Jun. 2024, 高分子学会, 高分子学会功績賞　　　　　　　　　　　　　　　
木質バイオマス高分子成分の機能解明と利活用
浦木康光

Sep. 2020, セルロース学会, セルロース学会賞　　　　　　　　　　　　　　　
浦木康光

Feb. 2007, The Japan Wood Research Society, The Japan Wood Research Society Prize　　　　　　　　　　　　　　　
リグニンを活用した機能性材料の開発
浦木康光

2007, 第５回北の木材科学賞　　　　　　　　　　　　　　　
Japan

2006, 日本木材学会賞　　　　　　　　　　　　　　　
Japan

2005, 第3回北の木材科学賞　　　　　　　　　　　　　　　
Japan

Jul. 2004, セルロース学会, セルロース学会林治助賞　　　　　　　　　　　　　　　
酢酸パルプ化リグノセルロースの特性と応用
浦木康光

Immunolocalization of the β– O –4 linked structure of lignin in wood and bamboo cell walls using a novel monoclonal antibody
Arata Yoshinaga, Munehisa Wada, Shingo Kiyoto, Shinichiro Hoshikawa, Yuta Nakamura, Noriaki Munekata, Taku Tsuyama, Rui Katahira, Yoshitaka Hirano, Hiroshi Kamitakahara, Toshiyuki Takano, Fumiaki Nakatsubo, Takao Kishimoto, Kengo Shigetomi, Yasumitsu Uraki, Keiji Takabe
Holzforschung, Walter de Gruyter GmbH, 09 Mar. 2026
Scientific journal, Abstract

A mouse monoclonal antibody was generated against a β– O –4 oligomer- p -aminohippuric acid-( p AHA)-bovine serum albumin (BSA) conjugate. Competitive ELISA showed that the antibody reacted specifically with β– O –4 oligomer conjugate and did not react with other dimeric model compound conjugates containing the β–5, β–β, or 5–5 linkages. This antibody reacted with both the β– O –4 linked guaiacyl and syringyl structures. In Chamaecyparis obtusa , labeling was strong in the secondary walls (SW), and weak in the compound middle lamella (CML). In Betula grossa , labeling was strong in the outer SW of wood fibers and uniform in the SW of vessel elements and the inner part of the SW of wood fibers. In contrast, labeling was strong in wood fibers rich in syringyl lignin in Quercus crispula and weak in CML, including cell corners, the SW of vessel elements, and vasicentric tracheids rich in guaiacyl lignin. In Phyllostachys edulis , labeling was uniform in developing fiber SW and stronger in inner part in developed fiber SW. The localization patterns were like those of feruloyl arabinoxylan epitopes. This novel antibody will be an effective tool to immunolocalize the β– O –4 linked structure of lignin in plant cell walls.

Reaction efficiency of derivatization followed by reductive cleavage (DFRC) for oligomeric and polymeric lignin models linked by only β-O-4' bonds
Keiichiro Takeuchi, Tatsuki Onoda, Kengo Shigetomi, Yasumitsu Uraki
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 46, 1, 33, 40, 02 Jan. 2026
English, Scientific journal

Solubility and structures of β- O -4 type lignin model compounds with different molar masses in aqueous 1,4-dioxane
Kengo Shigetomi, Tatsuki Onoda, Junko Miyazaki, Shiori Suzuki, Yasumitsu Uraki
Holzforschung, Walter de Gruyter GmbH, 23 Dec. 2025
Scientific journal, Abstract

Despite its macromolecular nature, the impact of the molecular sizes on the physicochemical behavior of lignin remains poorly understood. In this study, guaiacyl-type β- O -4 model compounds with varying chain lengths, corresponding to number–average degrees of polymerization (DP _n ) ranging from 2.2 to 35.8, and narrow molar mass dispersity were prepared to serve as simplified lignin models. The solubility of these model compounds was evaluated in a 1,4-dioxane/H ₂ O (96:4, v / v ) solvent system. Results showed that saturation dissolution concentrations ( C _sat ) significantly decreased with increasing chain length; specifically, the compound with a DP _n of 3.0 exhibited a C _sat of 289.7 g dm ⁻³ , whereas that with a DP _n of 35.8 showed a C _sat of only 0.9 g dm ⁻³ . Ultraviolet absorption and fluorescence spectroscopy indicated that J-aggregation-type π–π interactions occurred with increasing chain length. These findings offer novel insights into the conformational behavior of β- O -4 chains in solution and the solubility limitations imposed by lignin chain elongation.

Role of O-acetyl galactoglucomannan in softwood lignification
Shoichi Sato, Rikuto Watanabe, Kengo Shigetomi, Yutaka Tamai, Yuji Tsutsumi, Yasumitsu Uraki
Carbohydrate Polymers, 369, 124303, 124303, Elsevier BV, Dec. 2025
Scientific journal

5,5’-type coniferyl alcohol dimer as a potential lignin precursor: an investigation of reactivity in dehydrogenative polymerization
Kengo Shigetomi, Yasumitsu Uraki
Journal of Wood Science, 71, 1, Springer Science and Business Media LLC, 07 Jul. 2025
Scientific journal, Abstract

The 5–5’-type substructure in lignin is an important structure in that it can contribute to molecular branching as well as being condensed structure. To validate the involvement of the 5–5’-type dimer in lignin formation, 5,5’-dehydrodiconiferyl alcohol (bisCA) was synthesized, and its dehydrogenative polymerization was performed in mixed systems with coniferyl alcohol or deuterated ferulic acid (FA-d ₅) using horseradish peroxidase–H₂O₂. Interestingly, bisCA formed not only copolymers with coniferyl alcohol but also dehydrogenative polymers independently. The resulting products exhibited interunit linkages characteristic of lignin, such as β-β’ or dibenzodioxocin-type linkages. The dehydrogenative polymerization conducted with FA-d ₅ demonstrated chain growth from both side chains, which is essential for the formation of the internal 5–5’ substructure. These findings suggest that this dimeric substance is capable of contributing to the lignin formation in terms of reactivity., 45252819

Development of softwood kraft lignin-based conductive carbon for sustainable supercapacitor
Nutthira Pakkang, Masanori Hori, Shiori Suzuki, Yasumitsu Uraki
Holzforschung, Walter de Gruyter GmbH, 04 Feb. 2025
Scientific journal, Abstract

Electric double-layer capacitors (EDLCs) are promising devices for sustainable energy storage. However, EDLC components, such as separators and electrodes composed of activated carbon and conductive additives, are derived from fossil resources. To reduce this dependency, an EDLC was assembled using a separator and electrodes derived from hardwood kraft lignin, while still relying on fossil-based carbon black (CB) as the conductive additive. To achieve more sustainable EDLCs, this study developed all the conductive carbon, separator, and electrodes from softwood kraft lignin (SKL). When SKL was carbonized at 900 °C, it showed poor electrical conductivity and was unsuitable as a conductive additive. The carbon structures became more ordered with higher temperatures, and SKL-carbons prepared at 1,300–2,000 °C showed comparable conductivity to CB. The EDLCs with 1 wt % of these SKL-carbons exhibited higher capacitance and energy density than reference EDLCs with 1 and 5 wt % CB. Furthermore, a turbostratic (T) structure formed at 2,500 °C, enhancing conductivity and EDLC performance. SKL-carbon prepared at 2,800 °C exhibited a graphite structure in addition to the T structure, achieving the highest conductivity (0.54 S cm⁻¹), but the resulting EDLC showed low power density. Thus, SKL-carbon prepared at 2,500 °C was the best conductive additive for EDLCs.

UV irradiation during fluorescence measurements affects the structures and fluorescence properties of isolated lignins in solution
Keiichiro Takeuchi, Shiori Suzuki, Kengo Shigetomi, Yasumitsu Uraki
Journal of Wood Chemistry and Technology, 1, 11, Informa UK Limited, 12 Sep. 2024
Scientific journal

A quartz crystal microbalance with dissipation monitoring of dehydrogenative copolymerization of coniferyl alcohol and sinapyl alcohol
Shoichi Sato, Shiori Suzuki, Kengo Shigetomi, Yasumitsu Uraki
Journal of Wood Chemistry and Technology, 44, 3, 192, 199, Informa UK Limited, 18 Apr. 2024, [Peer-reviewed]
Scientific journal, 45252819

Facile Preparation of Optically Transparent Film of Acetylated Cellulose Nanofiber-Reinforced Poly(Methyl Methacrylate) Utilizing Cosolvency in Aqueous Ethanol
Shogo Taira, Ikuto Tanouchi, Shiori Suzuki, Tadahisa Iwata, Yasumitsu Uraki
Cellulose, 31, 3, 1559, 1568, Feb. 2024, [Peer-reviewed]

Swelling of lignin-based gel in salt-containing organic solvents and its application as gel electrolyte
Fumiya Honda, Shogo Taira, Shiori Suzuki, Kazuhiro Shikinaka, Kengo Shigetomi, Yasumitsu Uraki
Holzforschung, Walter de Gruyter GmbH, 31 Aug. 2023, [Peer-reviewed]
English, Scientific journal, Abstract

A lignin-based gel prepared by the chemical crosslinking of hardwood acetic acid lignin (AL) with poly(ethylene glycol) diglycidyl ether has been reported to shrink in water and organic solvents but swell specifically in aqueous binary solutions. In this study, the AL-based gel was also found to swell in lithium-salt-containing organic solvents, namely, liquid electrolytes. The uptake of salt solutions reached five times the dry weight of the gel. The ionic conductivity of the gel swollen with 1 M LiBF₄ in propylene carbonate or a mixed solution (1:1, v/v) of ethylene carbonate and dimethyl carbonate exceeded 1 mS cm⁻¹ at room temperature (25 °C), suggesting that this gel can be applied as a gel electrolyte for lithium-ion batteries (LIBs). A prototype LIB was assembled with the AL-based gel electrolyte and LiCoO₂/graphite-based electrodes and exhibited low bulk and charge transfer resistances of 4.1 and 9.7 Ω, respectively. Moreover, its initial specific capacity reached 104 mAh g⁻¹ at a current density of 28 mA g⁻¹, which is comparable to that of a reference LIB assembled using a commercial polyethylene separator. These results indicate the significant potential of this lignin-based gel for application in energy storage devices.

Pseudomonas bohemica strain ins3 eliminates antibacterial hinokitiol from its culture broth.
Ken Machino, Yoshimichi Sakakibara, Kota Osada, Takahiro Ochiai, Yasumitsu Uraki, Kengo Shigetomi
Bioscience, biotechnology, and biochemistry, 87, 2, 236, 239, 24 Jan. 2023, [International Magazine]
English, Scientific journal, A bacterial strain, Pseudomonas bohemica strain ins3 was newly isolated as a resistant strain against high concentrations of hinokitiol. This strain was revealed not only to show resistance but also completely remove this compound from its culture broth. In addition, its mechanism was revealed to be independent of conventional aromatic dioxygenases, ie catechol-1,2- or 2,3-dioxygenases.

Assembly of electric double-layer capacitors with hardwood kraft lignin-based electrodes and separator together with ionic liquid electrolyte
Nutthira Pakkang, Shiori Suzuki, Kengo Shigetomi, Yasumitsu Uraki
HOLZFORSCHUNG, Dec. 2022
English, Scientific journal

Synthesis of highly deuterated coniferyl alcohol for silencing of NMR signals in the resulting dehydrogenative polymer
Kengo Shigetomi, Mana Tokizawa, Yasumitsu Uraki
Journal of Wood Science, 68, 1, Springer Science and Business Media LLC, Dec. 2022
Scientific journal, Abstract

To establish a facile methodology for the elucidation of the lignin chain-growth mechanism, the preparation of monolignol that does not show NMR signals in the dehydrogenative polymer (DHP) was attempted. As a monolignol of which aliphatic moieties were deuterated, coniferyl alcohol-d₇ was successfully synthesized from protocatechualdehyde and malonic acid via the modified Knoevenagel–Doebner reaction and the Luche reduction. The process achieved high to excellent deuteration efficiencies at the aimed positions (i.e., methoxy: > 99%D, α: > 99%D, β: 92%D, and γ: 98%D). DHP was prepared solely from coniferyl alcohol-d₇, and its NMR spectra were compared with those from coniferyl alcohol. The results indicated that: (1) the deuterium atoms at methoxy group, α- and β-positions were highly retained even in the DHP, and their signals were effectively suppressed; (2) a part of the deuterium at γ-position was replaced with H through the reaction; (3) meanwhile, the formation of γ-CH₂ was negligible. This study demonstrated that coniferyl alcohol-d₇ could “silence” the majority of the signals even when converted to DHP. Highly deuterated monolignols can be a unique molecular tool that can differentiate the signals of interest from those derived from monolignols.

Effects of hemicelluloses on dehydrogenative polymerization of monolignols with cationic cell wall-bound peroxidase
Yan Lyu, Shiori Suzuki, Hiroki Nagano, Kengo Shigetomi, Yutaka Tamai, Yuji Tsutsumi, Yasumitsu Uraki
Carbohydrate Polymers, 301, 120305, 120305, Elsevier {BV}, 07 Nov. 2022, [Peer-reviewed]
English, Scientific journal

Stretched lignin/polyacrylonitrile blended carbon nanofiber as high conductive electrode in electric double layer capacitor
Manish Kumar, Shogo Taira, Nutthira Pakkang, Kengo Shigetomi, Yasumitsu Uraki
Advances in Natural Sciences: Nanoscience and Nanotechnology, 13, 2, Jun. 2022
Scientific journal

A NEW TEMPLATE OF MITSUNOBU ACYLATE CLEAVABLE IN NON-ALKALINE CONDITIONS
Yoshimichi Sakakibara, Yusuke Sai, Yasumitsu Uraki, Makoto Ubukata, Kengo Shigetomi
HETEROCYCLES, 104, 1, 140, 158, 2022
English, Scientific journal

Influences of polysaccharides in wood cell walls on lignification in vitro
Yan Lyu, Tatsuya Matsumoto, Shogo Taira, Kazumasa Ijiri, Arata Yoshinaga, Kengo Shigetomi, Yasumitsu Uraki
Cellulose, 28, 15, 9907, 9917, Springer Science and Business Media LLC, Oct. 2021, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Characterization of a lignin-based gel responsive to aqueous binary solvents and pH
Shogo Taira, Yuriko Usukura, Mitsukuni Nishida, Kengo Shigetomi, Yasumitsu Uraki
Holzforschung, 75, 8, 765, 772, Walter de Gruyter GmbH, 26 Aug. 2021, [Last author, Corresponding author]
English, Scientific journal

Direct deuteration of hinokitiol and its mechanistic study
Yoshimichi Sakakibara, Kota Osada, Yasumitsu Uraki, Makoto Ubukata, Kengo Shigetomi
Bioscience, Biotechnology, and Biochemistry, 85, 2, 215, 222, Oxford University Press (OUP), 18 Feb. 2021, [International Magazine]
English, Scientific journal,
Hinokitiol has a broad antibacterial activity against bacteria and fungi. While its biosynthetic pathway has been intensively studied, its dynamics in natural environments, such as biodegradation pathway, remain unclear. In this study, the authors report a direct deuterium labeling of hinokitiol as a traceable molecular probe to serve those studies. Hinokitiol was subjected to the H2-Pd/C-D2O conditions and deuterated hinokitiol was obtained with excellent deuteration efficiencies and in moderate yield. The 1H and 2H NMR spectra indicated that all ring- and aliphatic hydrogens except that on C-6 were substituted by deuterium. According to the substrate scope and computational chemistry, deuteration on tropolone ring was suggested to proceed via D+-mediated process, and which was supported by the results of the experiment with trifluoroacetic acid and Pd(TPP)4. On the other hand, the deuteration on aliphatic group was predicted to be catalyzed by Pd(II) species.

Effect of ozone treatment on softwood soda lignin-based water reducer performance for concrete
Shiho Takahashi, Yasumitsu Uraki, Tatsuhiko Yamada
BioResources, 16, 1, 1787, 1797, BioResources, 22 Jan. 2021, [Peer-reviewed]
English, Scientific journal, A lignin-based water reducer for concrete was prepared from softwood soda lignin. The soda lignin and the lignin-polyethylene glycol (PEG) derivative were modified with ozone to improve their performance as water reducers. The performance of ozone-treated soda lignin was superior than untreated soda lignin and commercial lignosulfonate-type water reducers in the mortar flow test. The soda lignin treated with a high ozone charge showed better performance than lignin treated with a low ozone charge. The ozone treatment improved the performance of the lignin-PEG derivative water reducer as well. The lignin-PEG derivative water reducer with a longer PEG chain length showed better performance than that of the shorter PEG chain. The zeta potential of cement suspension with the ozone-treated soda lignin showed a higher negative value than the untreated soda lignin. The data of zeta potential analysis suggested that the electrostatic repulsion force of cement particles with the ozone-treated lignin would be larger than the untreated lignin.

Preparation of kraft lignin-based activated carbon fiber electrodes for electric double layer capacitors using an ionic liquid electrolyte
Nutthira Pakkang, Manish Kumar, Shogo Taira, Keiichi Koda, Kengo Shigetomi, Yasumitsu Uraki
Holzforschung, 74, 6, 577, 588, Walter de Gruyter GmbH, 25 Jun. 2020, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal,
This article demonstrates the development of activated carbon fiber electrodes produced from hardwood kraft lignin (HKL) to fabricate electric double layer capacitors (EDLCs) with high energy and power densities using an ionic liquid (IL) electrolyte. A mixture solution of HKL, polyethylene glycol as a sacrificial polymer, and hexamethylenetetramine as a crosslinker in dimethylformamide/acetic acid (6/4) was electrospun, and the obtained fibers were easily thermostabilized, followed by carbonization and steam activation to yield activated carbon fibers (ACFs). The electrochemical performance of EDLCs assembled with the ACFs, 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF₄) as an IL electrolyte and a cellulosic separator was insufficient due to the low conductivity of the electrode. The conductivity of the electrode was improved successfully by spraying conductive carbon black (CB) onto the fibers mat during electrospinning. The CB containing electrodes with improved conductivity gave the resulting EDLCs a higher electrochemical performance, with an energy density of 91.5 Wh kg⁻¹ and a power density of 76.2 kW kg⁻¹.

A branched structure provides kraft lignins a denser morphology and a high molar mass for a given hydrodynamic radius
Linping Wang, Kengo Shigetomi, Keiichi Koda, Aori Gele, Yasumitsu Uraki
Holzforschung, 74, 6, 551, 558, 25 Jun. 2020, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal

Cellulose acetate with CTA I polymorph can be defibrated into nanofibers to produce a highly transparent nanopaper
Shogo Taira, Masataka Tsuruhara, Ryo Saito, Keiichi Koda, Yasumitsu Uraki, Haruo Konno, Shu Shimamoto
Cellulose, 27, 9, 4991, 5001, Springer Science and Business Media LLC, Jun. 2020, [Peer-reviewed], [Corresponding author]
English, Scientific journal

Comparison of Dehydrogenation Polymers by Commercial Enzymes, Laccase from Rhus vernicifera and Horseradish Peroxidase　　　　　　　　　　　　　　　
Tatsuya Matsumoto, Keiichi Koda, Kengo Shigetomi, Manish Kumar, Yasumitsu Uraki
Lignin, 1, 20, 28, Apr. 2020, [Peer-reviewed], [Last author]
English, Scientific journal

Effect of Vapor-Phase Surface Acetylation of Japanese Cedar Wood on Fungal Degradation and Dimensional Stability
Yuu Hasegawa, Mitsunori Mori, Keiichi Koda, Yasumitsu Uraki
Journal of Wood Chemistry and Technology, 40, 1, 1, 14, 02 Jan. 2020
English, Scientific journal

Direct Electrospinning of Cellulose Acetate onto Polyurethane Sheet and Effect of Its Saponification on Mechanical Properties
Md. Momotaz Ali, Nutthira Pakkang, Shogo Taira, Keiichi Koda, Koki Itoyama, Yasumitsu Uraki
Journal of Wood Chemistry and Technology, 39, 4, 282, 295, Informa UK Limited, 04 Jul. 2019, [Last author, Corresponding author]
English, Scientific journal

Development of Lignin-Based Terpolyester Film and Its Application to Separator Material for Electric Double-Layer Capacitor
Keiichi Koda, Shogo Taira, Atsushi Kubota, Tomofumi Isozaki, Xiangyu You, Yasumitsu Uraki, Kazuki Sugimura, Yoshiyuki Nishio
Journal of Wood Chemistry and Technology, 39, 3, 198, 213, Informa UK Limited, 04 May 2019
English, Scientific journal

Determination of the absolute molar mass of acetylated eucalyptus kraft lignin by two types of size-exclusion chromatography combined with multi-angle laser light-scattering detectors
Linping Wang, Yasumitsu Uraki, Keiichi Koda, Aori Gele, Xuesong Zhou, Fangeng Chen
Holzforschung, 73, 4, 363, 369, Walter de Gruyter GmbH, 24 Apr. 2019, [Peer-reviewed], [Corresponding author]
English, Scientific journal,
The molar mass (MM) and polydispersity indices (PDI) of acetylated hardwood kraft lignin (Ac-HWKL) and Ac-HWKL fractions were measured by size-exclusion chromatography with multi-angle laser light scattering (SEC-MALLS). The detectors worked at LL_{658 nm} and LL_{785 nm}. The MM of Ac-HWKL measured at 785 nm was much smaller than that measured at 658 nm. The number-average (Mn) and weight-average (Mw) molar masses of Ac-HWKL determined at 785 nm were approximately 6.2 and 6.5 times larger, respectively, than the values estimated using a conventional calibration curve created with authentic polystyrene standards in tetrahydrofuran (THF). Based on the Mw of Ac-HWKL fractions, the Mark-Houwink-Sakurada equation for Ac-HWKL was established to be [η]/ml g⁻¹=0.320 M^0.24 in THF and [η]/ml g⁻¹=0.142 M^0.26 in dimethyl sulfoxide (DMSO). These results demonstrate that Ac-HWKL has a more compact structure in an organic solvent than polystyrene.

TEMPO-oxidized cellulose nanofiber-reinforced lignin based polyester films as a separator for electric double-layer capacitor
Shogo Taira, Makoto Kurihara, Keiichi Koda, Kazuki Sugimura, Yoshiyuki Nishio, Yasumitsu Uraki
Cellulose, 26, 1, 569, 580, Springer Science and Business Media LLC, Jan. 2019, [Last author, Corresponding author]
English, Scientific journal

Preparation of Water-in-Oil Microemulsion from the Mixtures of Castor Oil and Sunflower Oil as Makeup Remover
Nutthira Pakkang, Yasumitsu Uraki, Keiichi Koda, Manit Nithitanakul, Ampira Charoensaeng
Journal of Surfactants and Detergents, 21, 6, 809, 816, Wiley, Nov. 2018, [Peer-reviewed], [Corresponding author]
English, Scientific journal

Optimization of simultaneous saccharification and fermentation conditions with amphipathic lignin derivatives for concentrated bioethanol production
Ningning Cheng, Keiichi Koda, Yutaka Tamai, Yoko Yamamoto, Taichi E. Takasuka, Yasumitsu Uraki
BIORESOURCE TECHNOLOGY, 232, 126, 132, May 2017, [Peer-reviewed]
English, Scientific journal

Association of amphipathic lignin derivatives with cellobiohydrolase groups improves enzymatic saccharification of lignocellulosics
Yoko Yamamoto, Ningning Cheng, Keiichi Koda, Kiyohiko Igarashi, Yutaka Tamai, Yasumitsu Uraki
CELLULOSE, 24, 4, 1849, 1862, Apr. 2017, [Peer-reviewed]
English, Scientific journal

Ligninolytic Activity at 0 °C of Fungi on Oak Leaves Under Snow Cover in a Mixed Forest in Japan　　　　　　　　　　　　　　　
T. Miyamoto, K. Koda, A. Kawaguchi, Y. Uraki
Microbial Ecology, 74, 2, 322, 331, Feb. 2017, [Peer-reviewed]
English, Scientific journal

Preparation of electric double layer capacitors (EDLCs) from two types of electrospun lignin fibers
Xiangyu You, Junlei Duan, Keiichi Koda, Tatsuhiko Yamada, Yasumitsu Uraki
HOLZFORSCHUNG, 70, 7, 661, 671, Jul. 2016, [Peer-reviewed]
English, Scientific journal

Preparation of High-Performance Internal Tandem Electric Double-Layer Capacitors (IT-EDLCs) from Melt-Spun Lignin Fibers
Xiangyu You, Keiichi Koda, Tatsuhiko Yamada, Yasumitsu Uraki
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 36, 6, 418, 431, 2016, [Peer-reviewed]
English, Scientific journal

Preparation of electrode for electric double layer capacitor from electrospun lignin fibers
Xiangyu You, Keiichi Koda, Tatsuhiko Yamada, Yasumitsu Uraki
HOLZFORSCHUNG, 69, 9, 1097, 1106, Nov. 2015, [Peer-reviewed]
English, Scientific journal

Dehydrogenative Polymerization of Coniferyl Alcohol in Artificial Polysaccharides Matrices: Effects of Xylan on the Polymerization
Qiang Li, Keiichi Koda, Arata Yoshinaga, Keiji Takabe, Masatsugu Shimomura, Yuji Hirai, Yutaka Tamai, Yasumitsu Uraki
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 63, 18, 4613, 4620, May 2015, [Peer-reviewed]
English, Scientific journal

Thermal Melting of Lignin Derivatives Prepared from Dried Black Liquor Powder of Softwood Soda-AQ Cooking and Polyethylene Glycol
Kukjin Yoon, Shiho Takahashi, Thi Thi Nge, Olov Karlsson, Akiko Nakagawaizumi, Hiroshi Ohi, Yasumitsu Uraki, Tatsuhiko Yamada
BIORESOURCES, 10, 1, 912, 921, 2015, [Peer-reviewed]
English, Scientific journal

PERFORMANCE OF SOFTWOOD SODA-ANTHRAQUINONE LIGNIN-POLYETHYLENE GLYCOL DERIVATIVES AS WATER-REDUCING ADMIXTURE FOR CONCRETE
Shiho Takahashi, Shuji Hosoya, Masami Hattori, Masakazu Morimoto, Yasumitsu Uraki, Tatsuhiko Yamada
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 35, 5, 348, 354, 2015, [Peer-reviewed]
English, Scientific journal

Amphipathic lignin derivatives to accelerate simultaneous saccharification and fermentation of unbleached softwood pulp for bioethanol production
Ningning Cheng, Yoko Yamamoto, Keiichi Koda, Yutaka Tamai, Yasumitsu Uraki
BIORESOURCE TECHNOLOGY, 173, 104, 109, Dec. 2014, [Peer-reviewed]
English, Scientific journal

Enzymatic Saccharification of Soda Pulp from Sago Starch Waste Using Sago Lignin-Based Amphipathic Derivatives
Ina Winarni, Keiichi Koda, Totok K. Waluyo, Gustan Pari, Yasumitsu Uraki
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 34, 3, 157, 168, Jul. 2014, [Peer-reviewed]
English, Scientific journal

Improvement of Mechanical Properties of Softwood Lignin-Based Carbon Fibers
Jian Lin, Keiichi Koda, Satoshi Kubo, Tatsuhiko Yamada, Makiko Enoki, Yasumitsu Uraki
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 34, 2, 111, 121, Jun. 2014, [Peer-reviewed]
English, Scientific journal

Performance of softwood soda-anthraquinone lignin as water reducing chemical admixture in concrete
ShihoTakahashi, Masami Hattori, Masakazu Morimoto, Yasumitsu Uraki, Tatsuhiko Yamada
Journal of Wood Chemistry and Technology, 34, 31, 38, Jan. 2014, [Peer-reviewed]
Scientific journal

Preparation of novel lignin-based cement dispersants from isolated lignins
Tomohiro Aso, Keiichi Koda, Satoshi Kubo, Tatsuhiko Yamada, Isamu Nakajima, Yasumitsu Uraki
Journal of Wood Chemistry and Technology, 33, 4, 286, 298, 2013, [Peer-reviewed]
English, Scientific journal

Improvement of Enzymatic Saccharification of Unbleached Cedar Pulp with Amphipathic Lignin Derivatives
Ina Winarni, Chihiro Oikawa, Tatsuhiko Yamada, Kiyohiko Igarashi, Keiichi Koda, Yasumitsu Uraki
BIORESOURCES, 8, 2, 2195, 2208, 2013, [Peer-reviewed]
English, Scientific journal

Utilization of Lignin Obtained by Separation of Wood Components
URAKI Yasumitsu
JAPAN TAPPI JOURNAL, 66, 10, 1120, 1125, JAPAN TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY, 01 Oct. 2012
Japanese, To establish chemical biorefinery for woody biomass, it is very important to convert lignin into value-added materials in addition to its use as an energy source. In this report, I would like to introduce its conversion to several valuable, functional materials on the basis of our recent research.
The first example is lignin-based carbon fibers (CF). In their production, spinning is a first process. There are proposed two methods, melt spinning and electro-spinning. The latter method for lignin was reported in the last decade. The second process is thermostabilization. The resultant lignin fibers prepared by both methods have high thermal mobility, such as glass transition and thermal flow. Thereby, the fiber morphology is changed by direct carbonization. To prevent morphological change, the thermostabilization process is very important. However, it is a tedious and time-consuming process. We developed a novel type of lignin fibers, which was easily converted into thermally stable fibers by the treatment with concentrated hydrochloric acid for 2 hs. The final product, CF, prepared from the lignin fibers had comparable tensile strength to lignin-based CF reported previously.
The other example for lignin-based functional materials is amphiphilic lignin derivatives, which are obtained by the reaction of isolated lignins or kraft black liquor with epoxylated polyethylene glycol. When these lignin derivatives were added to a saccharification medium using cellulase, the enzymatic saccharification efficiency was improved and residual activity of cellulase was maintained at a higher level. In addition, one type of the amphiphilic lignin derivative also had a superior ability for the cement dispersion to commercially available lignosulfonate that is well known as a cement dispersant.

Thermal Mobility of beta-O-4-Type Artificial Lignin
Yasumitsu Uraki, Yusuke Sugiyama, Keiichi Koda, Satoshi Kubo, Takao Kishimoto, John F. Kadla
BIOMACROMOLECULES, 13, 3, 867, 872, Mar. 2012, [Peer-reviewed]
English, Scientific journal

PREPARATION OF NOVEL LIGNIN-BASED CEMENT DISPERSANT VIA AMPHIPHILIC DERIVATIZATION OF TECHNICAL LIGNIN
Tomohiro Aso, Keiichi Koda, Satoshi Kubo, Tatsuhiko Yamada, Isamu Nakajima, Yasumitsu Uraki
PROCEEDING OF THE 4TH INTERNATIONAL CONFERENCE ON PULPING, PAPERMAKING AND BIOTECHNOLOGY (ICPPB '12), VOLS. I AND II, 90, 93, 2012, [Peer-reviewed]
English, International conference proceedings

PREPARATION OF CARBON FIBERS FROM SOFTWOOD LIGNIN THROUGH CHEMICAL THERMOSTABILIZATION
Jian Lin, Satoshi Kubo, Tatsuhiko Yamada, Keiichi Koda, Yasumitsu Uraki
PROCEEDING OF THE 4TH INTERNATIONAL CONFERENCE ON PULPING, PAPERMAKING AND BIOTECHNOLOGY (ICPPB '12), VOLS. I AND II, 860, 863, 2012, [Peer-reviewed]
English, International conference proceedings

ELECTRICITY-FREE PRODUCTION OF ACTIVATED CARBON FROM BIOMASS IN BORNEO TO IMPROVE WATER QUALITY
Masato Ogawa, Teuku B. Bardant, Yasutaka Sasaki, Yutaka Tamai, Seiichi Tokura, Yasumits Uraki
BIORESOURCES, 7, 1, 236, 245, 2012, [Peer-reviewed]
English, Scientific journal

CHEMICAL THERMOSTABILIZATION FOR THE PREPARATION OF CARBON FIBERS FROM SOFTWOOD LIGNIN
Jian Lin, Satoshi Kubo, Tatsuhiko Yamada, Keiichi Koda, Yasumitsu Uraki
BIORESOURCES, 7, 4, 5634, 5646, 2012, [Peer-reviewed]
English, Scientific journal

Novel Functions of Non-Ionic, Amphiphilic Lignin Derivatives
Yasumitsu Uraki, Keiichi Koda, Tatsuhiko Yamada, Chihiro Oikawa, Tomohiro Aso
FUNCTIONAL MATERIALS FROM RENEWABLE SOURCES, 1107, 243, +, 2012, [Peer-reviewed]
English, International conference proceedings

P108 Separation and Material Utilization of Woody Biomass Components in the Solvolysis Systems
Kubo Satoshi, Yamada Tatsuhiko, Honma Harumi, Uraki Yasumitsu
Proceedings of the Conference on Biomass Science, 4, 66, 67, The Japan Institute of Energy, 2009
Japanese, Japanese cedar was subjected to the acid catalyzed solvolysis using a mixed solvent of glycols and cyclic carbonates. In this one step solvolysis, lignin having oxyalkyl chains such as polyethylene glycol (EG) chains was prepared together with furfurals and levulinic acid from carbohydrate components. Solvolysis lignin was expected to be utilized as macromolecular surfactants from its amphiphile like chemical structure. However, dissolution properties to water and/or chain flexibility of introduced oxyalkyl chains of solvolysis lignin must be improved for the surfactant application. Another possibility of the solvolysis lignin could be found in the plastic applications. Thermal molding abilities of solvolysis lignin could be improved by the introduction of propylene glycol units in oxyalkyl chains instead of EG units. Solvolysis lignins having polypropylene glycol chains could be spun continuously by melt spinning using a laboratory mixing extruder. This lignin fibre could be thermally stabilized by removing PPG chains through a simple acid washing process. This result would indicate that solvolysis lignin fibres could be converted into carbon fibers with simplified process.

Preparation and Characterization of Amphiphilic Lignin Derivatives as Surfactants
Harumi Homma, Yasumitsu Uraki, Makoto Ubukata, Satoshi Kubo, Tatsuhiko Yamada
PROCEEDINGS OF INTERNATIONAL CONFERENCE ON PULPING, PAPERMAKING AND BIOTECHNOLOGY 2008: ICPPB '08, VOL I, 654, 658, 2008, [Peer-reviewed]
English, International conference proceedings

Reactivity of beta-O-4 Determination Methods to Artificial beta-O-4 Lignin Polymers
Yoshie Kanazawa, Takao Kishimoto, Keiichi Koda, Kazuhiko Fukushima, Yasumitsu Uraki
PROCEEDINGS OF INTERNATIONAL CONFERENCE ON PULPING, PAPERMAKING AND BIOTECHNOLOGY 2008: ICPPB '08, VOL I, 659, 663, 2008, [Peer-reviewed]
English, International conference proceedings

リグニン含有パルプを原料とする材料開発
浦木 康光
繊維学会誌, 63, 1, P.18, P.22, The Society of Fiber Science and Technology, Japan, 2007
Japanese

Fibrous carbons from woody biomass
Yasumitsu Uraki, Satoshi Kubo
MOKUZAI GAKKAISHI, 52, 6, 337, 343, 2006, [Peer-reviewed]
Japanese

Patterned cellulose films
Uraki Yasumitsu, Matsumoto Chiaki, Tamai Yutaka, Kishimoto Takao, Ubukata Makoto, Yabu Hiroshi, Tanaka Masaru, Shimomura Masatsugu, Beihai H, Shiya F, Fangeng C
Research Progress in Pulping and Papermaking, 2006, 898, 903, 2006, [Peer-reviewed]

Synthesis of polymeric lignin model compounds composed of β-O-4 structure and their analysis by MALDI-TOF-MS　　　　　　　　　　　　　　　
Takao Kishimoto, Yasumitsu Uraki, Makoto Ubukata
Appita Annual Conference, 2, 345, 348, 2005
English, International conference proceedings

Delignification mechanism during high-boiling solvent pulping. Part 6: Changes in lignin structure analyzed by 1H-13C correlation 2-D NMR spectroscopy　　　　　　　　　　　　　　　
Kishimoto T, Ueki A, Takamori H, Uraki Y, Ubukata M
Organic & Biomolecular Chemistry, 3, 1067, 1073, 2005, [Peer-reviewed]
English, Scientific journal

Easy synthesis of b-O-4 type lignin related polymers
Kishimoto, T, Y. Uraki, M. Ubukata
Org. Biomol. Chem., 3, 6, 1067, 1073, 2005, [Peer-reviewed]
English, Scientific journal

Creation of honeycomb-patterened cellulose by using a microorganism as a micro-machine
Uraki Y, Otsuka H, Ubukata M, Yabu H, Tanaka M, Shimomura M
Polymer Preprints, Japan, 54, 1, 1561, 2005, [Peer-reviewed]

Nemoto J., Uraki Y., Kishimoto T., Sano Y., Funada R., Obata N., Yabu H., Tanaka M., Shimomura M.
Nemoto J, Uraki Y, Kishimoto T, Sano Y, Funada R, Obata N, Yabu H, Tanaka M, Shimomura M
Bioresource Technology, 96, 17, 1955, 1958, 2005, [Peer-reviewed]
English, Scientific journal

Analysis of adsorption behavior of monolignols onto henficellulose using surface plasmon resonance
A Nakamura, Y Uraki, T Kishimoto, M Ubukata
2nd International Symposium on Technologies Of Pulping, Papermaking and Biotechnology on Fiber Plants, Proceedings, 521, 524, 2004, [Peer-reviewed]
English, International conference proceedings

Thermoresponsive gels prepared from hydroxypropylated unbleached pulp
T Imura, Y Uraki, T Kisimoto, M Ubukata
2nd International Symposium on Technologies Of Pulping, Papermaking and Biotechnology on Fiber Plants, Proceedings, 591, 594, 2004, [Peer-reviewed]
English, International conference proceedings

Lignin gel with unique swelling property
M Nishida, Y Uraki, Y Sano
BIORESOURCE TECHNOLOGY, 88, 1, 81, 83, May 2003, [Peer-reviewed]
English, Scientific journal

Ozone bleaching of atmospheric acetic acid hardwood pulp from Betula platyphylla var. japonica Hara
T Kishimoto, H Tsuji, Y Uraki, Y Sano
HOLZFORSCHUNG, 57, 2, 181, 188, 2003, [Peer-reviewed]
English, Scientific journal

Preparation of board-like moldings from composites of isolated lignins and waste paper
J Nemoto, Y Uraki, Y Sano
MOKUZAI GAKKAISHI, 49, 4, 287, 292, 2003, [Peer-reviewed]
Japanese, Scientific journal

Preparation and Characterization of Alginate-blended Rayon
URAKI Yasumitsu, MIHARU Yousuke, FUNADA Ryo, SANO Yoshihiro, MITSUHASHI Masaki, ITOYAMA Kohki, TANIBE Hiroaki
Sen-ito Kogyo, 56, 10, 482, 486, The Society of Fiber Science and Technology, Japan, 10 Oct. 2000
English, Alginate-blended rayon was prepared from a mixture of alginate and cellulose xantate in alkaline solution. Wide distribution of alginate in the whole fiber was revealed by scanning electron microscopy-energy dispersive X-ray microanalysis (SEM-EDX) and confocal laser scanning microscopy. The alginate blended in the rayon could not be removed by aqueous alkaline solution completely, suggesting that a part of the blended alginate formed tight complex with cellulose. The blended rayon had an excellent moisture sorption property such as a superior moisture sorption and a comparable heat of sorption to those of wool.

Activated carbon fibers from acetic acid lignin
Y Uraki, S Kubo, H Kurakami, Y Sano
HOLZFORSCHUNG, 51, 2, 188, 192, 1997, [Peer-reviewed]
English, Scientific journal

Thermomechanical analysis of isolated lignins
Satoshi Kubo, Yasumitsu Uraki, Yoshihiro Sano
Holzforschung, 50, 2, 144, 150, Walter de Gruyter and Co., 1996, [Peer-reviewed]
English, Scientific journal

PREPARATION OF CARBON-FIBERS FROM ORGANOSOLV LIGNIN OBTAINED BY AQUEOUS ACETIC-ACID PULPING
Y URAKI, S KUBO, N NIGO, Y SANO, T SASAYA
HOLZFORSCHUNG, 49, 4, 343, 350, 1995, [Peer-reviewed]
English, Scientific journal

Site specific binding of calcium ions to anionic chitin derivatives
Yasumitsu Uraki, Takatoshi Fujii, Tohru Matsuoka, Yoshiaki Miura, Seiichi Tokura
Carbohydrate Polymers, 20, 2, 139, 143, 1993
Scientific journal

Influence of Delignification on Physicochemical Properties of Solvolysis Pulp.
Uraki Yasumitsu, Ogawa Shoichi, Sano Yoshihiro, Sasaya Takashi, Takai Mitsuo
Sen-ito Kogyo, 49, 7, 367, 372, The Society of Fiber Science and Technology, Japan, 1993
English, Solvolysis pulps (CWPs) were prepared from two species of softwoods using the cresol-water system. The crystallinity, degree of polymerization (DP) and α-cellulose content of the CWPs were measured to elucidate the influence of delignification with sodium chlorite on the physicochemical properties of CWP. X-ray diffractograms revealed that the crystalline regions of CWPs maintained the cellulose I structure. An increase in the crystallinity of CWPs with increasing delignification was observed by X-ray diffraction and ¹³C-CP/MAS NMR studies. A further delignification brought about a slight destruction of the crystalline regions. DP was decreased significantly at the initial stage of the delignification and then was gradually decreased. α-Cellulose content of the delignified pulp was also reduced slightly at the final stage. A similar tendency was observed for commercial unbleached kraft pulp and sulfite pulp which underwent the same treatment. These results suggested that the amorphous regions of unbleached pulps were destroyed during the delignification treatment due to the acidic medium follwed by collapse of the crystalline regions.

Calcium-mediated adsorption of neutral amino acids to carboxymethylated chitin
Yasumitsu Uraki, Seiichi Tokura
Journal of Macromolecular Science: Part A - Chemistry, 25, 10-11, 1427, 1441, 1988, [Peer-reviewed]
English, Scientific journal

Hinokitiolの直接重水素標識とその反応機構
榊原義道, 長田晃汰, 浦木康光, 生方信, 重冨顕吾, 日本木材学会大会研究発表要旨集(完全版)(CD-ROM), 70th, 2020

S1+G型の引張あて材木部繊維におけるリグニンと非セルロース性多糖類、AGPの分布．　　　　　　　　　　　　　　　
吉永 新, 粟野達也, 幸田圭一, 玉井 裕, 浦木康光, 高部圭司, 第69回日本木材学会大会講演要旨集, Mar. 2019
Japanese, Summary national conference

コニフェリルアルコールの脱水素重合に及ぼすヘミセルロースの効果．　　　　　　　　　　　　　　　
松尾朱実, 古川貴大, 玉井 裕, 幸田圭一, 浦木康光, 吉永 新, 高部圭司, 第68回日本木材学会大会講演要旨集, Mar. 2018
Japanese, Summary national conference

樹木組織中での安定同位体標識モノリグノール類の移動～同位体顕微鏡による可視化～　　　　　　　　　　　　　　　
小川真由, 幸田圭一, 重富顕吾, 坂本直哉, 高部圭司, 吉永 新, 浦木康光, 第67回日本木材学会大会講演要旨集, 129, 129, Mar. 2017
Japanese, Summary national conference

両親媒性リグニン誘導体を用いたリグノセルロースからのバイオエタノール製造
CHENG Ningning, 山本陽子, 幸田圭一, 浦木康光, 五十嵐圭日子, セルロース学会年次大会講演要旨集, 23rd, 2016

Honeycomb-patterned cellulose films as a promising tool to investigate deformation of wood cross section and wood cell wall formation
Yasumitsu Uraki, Qiang Li, Teuku Bardant, Keiichi Koda, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 249, Mar. 2015
English, Summary international conference

Utilization of wood cell wall components. Journal of Wood Science
Yasumitsu Uraki, Keiichi Koda, Journal of Wood Science, 61, 3, 447, 454, 2015, [Peer-reviewed], [Invited]
English, Introduction scientific journal

セルラーゼ活性を増強する両親媒性リグニン誘導体-セルラーゼとの相互作用解析-
山本陽子, CHENG Ningning, WINARNI Ina, 五十嵐圭日子, 幸田圭一, 浦木康光, セルロース学会年次大会講演要旨集, 21st, 2014

バイオエタノール生産に有用な両親媒性リグニン誘導体
山本陽子, CHENG Ningning, 幸田圭一, 浦木康光, 五十嵐圭日子, 日本木材学会北海道支部講演集(Web), 46, 2014

セルラーゼと両親媒性リグニン誘導体との相互作用
山本陽子, 及川千皓, 幸田圭一, 浦木康光, 五十嵐圭日子, セルロース学会年次大会講演要旨集, 20th, 2013

Potential Functions and Utilization of Amphiphilic Lignin Derivatives
Yasumitsu Uraki, Keiichi Koda, Tatsuhiko Yamada, 機能材料, 32, 2, 42, 47, 2012, [Invited]
シーエムシー出版, Japanese, Introduction commerce magazine

Wood Biorefinery IV: Chemical Pulping and Utilization of Separated Compounds
Yasumitsu Uraki, Keiichi Koda, Journal of the society of materials science, Japan, 61, 10, 867, 871, 2012, [Peer-reviewed]
The Society of Materials Science, Japan, Japanese, Introduction scientific journal

ELECTRICITY-FREE PRODUCTION OF ACTIVATED CARBON FROM BIOMASS IN BORNEO TO IMPROVE WATER QUALITY
Masato Ogawa, Teuku B. Bardant, Yasutaka Sasaki, Yutaka Tamai, Seiichi Tokura, Yasumits Uraki, BIORESOURCES, 7, 1, 236, 245, 2012
English

Fabrication of honeycomb-patterned cellulose material that mimics wood cell wall formation processes
Yasumitsu Uraki, Yutaka Tamai, Takuro Hirai, Keiichi Koda, Hiroshi Yabu, Masatsugu Shimomura, MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS, 31, 6, 1201, 1208, Aug. 2011
English

Amphiphilic lignin derivatives as cellulase-aid agent and cement admixture
Yasumitsu Uraki, Chihiro Oikawa, Tomohiro Aso, Keiichi Koda, Tatsuhiko Yamada, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 241, Mar. 2011
English, Summary international conference

セルラーゼ活性増強剤となるリグニン誘導体の開発
及川千皓, イナウィナルニ, 幸田圭一, 浦木康光, 山田竜彦, 野尻昌信, 五十嵐圭日子, 高分子学会北海道支部研究発表会講演要旨集, 45th, 2011

両親媒性リグニン誘導体とセルラーゼ間の相互作用の解明
及川千皓, WINARNI Ina, 幸田圭一, 浦木康光, 山田竜彦, 野尻昌信, 五十嵐圭日子, セルロース学会年次大会講演要旨集, 18th, 2011

両親媒性リグニン誘導体とセルラーゼ間の相互作用の解明
及川千皓, イナウィナルニ, 幸田圭一, 浦木康光, 山田竜彦, 野尻昌信, 五十嵐圭日子, 日本木材学会北海道支部講演集(Web), 43, 2011

ヘミセルロース吸着ハニカムセルロースフィルムの調製とその肝実質細胞培養基質としての有用性の評価
田崎裕佳, テウク ベルナバルダント, 浦木康光, 幸田圭一, 藪浩, 下村政嗣, 高分子学会北海道支部研究発表会講演要旨集, 45th, 2011

ヘミセルロース吸着ハニカムパターン化セルロースの物性とその応用
田崎裕佳, BARDANT Teuku Berna, 浦木康光, 幸田圭一, 平井悠司, 藪浩, 下村政嗣, セルロース学会年次大会講演要旨集, 18th, 2011

UTILIZATION OF AMPHIPHILIC LIGNIN DERIVATIVES
Yasumitsu Uraki, Harumi Homma, Chihiro Oikawa, Tomohiro Aso, Keiichi Koda, 16TH INTERNATIONAL SYMPOSIUM ON WOOD, FIBER AND PULPING CHEMISTRY, PROCEEDINGS, VOLS I & II, 165, 169, 2011
English

ホットメルトするリグニン　　　　　　　　　　　　　　　
ホットメルト材料および装置、製品の最新技術と使い方ノウハウ, 78, 82, 2011

Chemicals from lignin based on thermal fusibility and amphiphilicity
Keiichi Koda, Satoshi Kubo, Yasumitsu Uraki, ACS Symposium Series, 1067, 261, 277, 2011
American Chemical Society, English

Fabrication of Artificial Wood Cell Wall Based on Honeycomb-patterned Bacterial Cellulose as a Basic Framework
URAKI Yasumitsu, Journal of the Surface Science Society of Japan, 31, 6, 301, 306, 10 Jun. 2010
日本表面科学会, Japanese

セルラーゼ活性増強剤となるリグニン誘導体の開発
及川千皓, 幸田圭一, 浦木康光, 山田竜彦, 野尻昌信, 五十嵐圭日子, セルロース学会年次大会講演要旨集, 17th, 2010

ヘミセルロース吸着ハニカムパターン化セルロースの調製とその応用
田崎裕佳, 浦木康光, 幸田圭一, 山本貞明, 藪浩, 下村政嗣, セルロース学会年次大会講演要旨集, 17th, 2010

アラビノガラクタン吸着ハニカムパターン化セルロースの特性
浦木康光, 田崎裕佳, 玉井裕, 山本貞明, 藪浩, 下村政嗣, 高分子学会予稿集(CD-ROM), 59, 2 Disk1, 2010

Mechanical Effect of Acetic Acid Lignin Adsorption on Honeycomb-Patterned Cellulosic Films
Yasumitsu Uraki, Chinatsu Matsumoto, Takuro Hirai, Yutaka Tamai, Makiko Enoki, Hiroshi Yabu, Masaru Tanaka, Masatsugu Shimomura, JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 30, 4, 348, 359, 2010
English

FABRICATION OF ARTIFICIAL WOOD CELL WALL AND ITS APPLICATION
Yuka Tasaki, Yasumitsu Uraki, Keiichi Koda, Sadaaki Yamamoto, Hiroshi Yabu, Masatsugu Shimomura, RESEARCH PROGRESS IN PAPER INDUSTRY AND BIOREFINERY (4TH ISETPP), VOLS 1-3, 3, 1465, 1468, 2010
English

IMPROVEMENT OF CELLULASE ACTIVITY WITH AMPHIPHILIC LIGNIN DERIVATIVE
Chihiro Oikawa, Keiichi Koda, Yasumitsu Uraki, Masanobu Nojiri, Tatsuhiko Yamada, Kiyohiko Igarashi, RESEARCH PROGRESS IN PAPER INDUSTRY AND BIOREFINERY (4TH ISETPP), VOLS 1-3, 2, 1306, 1309, 2010
English

FUSIBILITY OF ISOLATED LIGNINS
Yasumitsu Uraki, Keiichi Koda, Takao Kishimoto, Satoshi Kubo, RESEARCH PROGRESS IN PAPER INDUSTRY AND BIOREFINERY (4TH ISETPP), VOLS 1-3, 1, 315, 318, 2010
English

Improvement of Saccharification of Empty Fruit Bunch and Japanese Cedar Pulps with an Amphiphilic Lignin Derivative
Teuku Beuna Bardant, Chihiro Oikawa, Masanobu Nojiri, Keiichi Koda, Yasumitsu Uraki, Yanni Sudiyani, Tatsuhiko Yamada, Mokuzai Gakkaishi/Journal of the Japan Wood Research Society, 56, 6, 420, 426, 2010
English

Influence of Syringyl to Guaiacyl Ratio on the Structure of Natural and Synthetic Lignins
Takao Kishimoto, Wakako Chiba, Kaori Saito, Kazuhiko Fukushima, Yasumitsu Uraki, Makoto Ubukata, JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 58, 2, 895, 901, Jan. 2010
English

Conversion of Technical Lignins to Amphiphilic Derivatives with High Surface Activity
Harumi Homma, Satoshi Kubo, Tatsuhiko Yamada, Keiichi Koda, Yasuyuki Matsushita, Yasumitsu Uraki, JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 30, 2, 164, 174, 2010
English

Improvement of Saccharification of Empty Fruit Bunch and Japanese Cedar Pulps with an Amphiphilic Lignin Derivative
Teuku Beuna Bardant, Chihiro Oikawa, Masanobu Nojiri, Keiichi Koda, Yanni Sudiyani, Tatsuhiko Yamada, Yasumitsu Uraki, MOKUZAI GAKKAISHI, 56, 6, 420, 426, 2010
Japanese

Synthesis of artificial lignin polymer
Takao Kishimoto, Yasumitsu Uraki, Makoto Ubukata, Masahiro Hamada, Noriyuki Nakajima, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 237, Mar. 2009
English, Summary international conference

PREPARATION OF ACTIVATED CARBON FROM PEAT
Yasumitsu Uraki, Yutaka Tamai, Masato Ogawa, Sampang Gaman, Seiichi Tokura, BIORESOURCES, 4, 1, 205, 213, Feb. 2009
English

木材多糖類の機能化-人工細胞壁の創製に向けて-
浦木康光, 玉井裕, 平井卓郎, 藪浩, 田中賢, 下村政嗣, 高分子学会予稿集(CD-ROM), 58, 2 Disk1, 2009

CRYSTALLINITY OF POLYETHYLENE GLYCOL CHAINS ANCHORED ON LIGNIN MOLECULES　　　　　　　　　　　　　　　
15th International Symposium of Wood, Fiber and Pulping Chemistry, P-170, 2009

CONVERSION OF ACETIC ACID LIGNIN TO A NONIONIC POLYMERIC SURFACTANT　　　　　　　　　　　　　　　
15th International Symposium of Wood, Fiber and Pulping Chemistry, P-163, 2009

CLEAVAGE OF ETHEREAL BONDS IN LIGNIN STRUCTURE WITH ALUMINIUM IODIDE (III) -FORMATION OF CATECHOL MOIETIES FROM GUAIACYL UNITS　　　　　　　　　　　　　　　
15th International Symposium of Wood, Fiber and Pulping Chemistry, P-042, 2009

INFLUENCE OF SYRINGYL-TOGUAIACYL RATIO ON THE STRUCTURE OF LIGNIN　　　　　　　　　　　　　　　
15th International Symposium of Wood, Fiber and Pulping Chemistry, P-002, 2009

CREATION OF ARTIFICIAL CELL WALL BY USING HONEYCOMB-PATTERNED CELLULOSE.　　　　　　　　　　　　　　　
Proceedings of International Conference on Pulping, papermaking and Biotechnology, O-054, 2009

Evaluation of Reaction Efficiency of Thioacidolysis for Cleavage of -O-4 Interunitary Linkages by Using -O-4 Type Artificial Lignin Polymer
Yoshie Kanazawa, Takao Kishimoto, Keiichi Koda, Kazuhiko Fukushima, Yasumitsu Uraki, JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 29, 2, 178, 190, 2009
English

Synthesis of beta-O-4-type artificial lignin polymers and their analysis by NMR spectroscopy
Takao Kishimoto, Yasumitsu Uraki, Makoto Ubukata, ORGANIC & BIOMOLECULAR CHEMISTRY, 6, 16, 2982, 2987, Aug. 2008
English

Graft polymerization of vinyl monomers onto cotton fibres pretreated with amines
Md. Ibrahim H. Mondal, Yasumitsu Uraki, Makoto Ubukata, Koki Itoyama, CELLULOSE, 15, 4, 581, 592, Aug. 2008
English

Development of coagulant for dredging using sea alga; Preparation of algal paste and its coagulating effect for muddy water
Makiko Enoki, Michisuke Sato, Kodai Kaneda, Ryota Sekiyama, Akiko Nakagawa, Yasumitsu Uraki, Haruyuki Kanehiro, Nippon Suisan Gakkaishi (Japanese Edition), 74, 4, 688, 693, Jul. 2008
Chinese

Development of coagulant for dredging using sea alga; Preparation of algal paste and its coagulating effect for muddy water
Makiko Enoki, Michisuke Sato, Kodai Kaneda, Ryota Sekiyama, Akiko Nakagawa, Yasumitsu Uraki, Haruyuki Kanehiro, NIPPON SUISAN GAKKAISHI, 74, 4, 688, 693, Jul. 2008
Japanese

セルロース系繊維の吸放湿特性
浦木康光, 生方信, MONDAL Md, Ibrahim H, 糸山光紀, 繊維学会予稿集, 63, 1/2, 110, 18 Jun. 2008
Japanese

非イオン性リグニン界面活性剤の特性
本間春海, 浦木康光, 生方信, 久保智史, 山田竜彦, 繊維学会予稿集, 63, 1/2, 128, 18 Jun. 2008
Japanese

CELL 5-Enhancement of moisture sorption ability of cellulosic fibers by means of polymer blend and graft polymerization
Yasumitsu Uraki, Md Mondal H. Ibrahim, Koki Itoyama, Makoto Ubukata, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 235, Apr. 2008
English, Summary international conference

低分子リグニンによるNF‐κBの活性化の抑制
三橋進也, 岸本崇生, 浦木康光, 生方信, 日本農芸化学会大会講演要旨集, 2008, 168, 05 Mar. 2008
Japanese

Low molecular weight lignin suppresses activation of NF-kappa B and HIV-1 promoter
Shinya Mitsuhashi, Takao Kishimoto, Yasumitsu Uraki, Takashi Okamoto, Makoto Ubukata, BIOORGANIC & MEDICINAL CHEMISTRY, 16, 5, 2645, 2650, Mar. 2008
English

細胞壁モデルとしてのリグニン吸着ハニカムパターン化セルロースフィルム
松本千夏, 浦木康光, 平井卓郎, 生方信, 藪浩, 田中賢, 下村政嗣, 高分子学会北海道支部研究発表会講演要旨集, 42nd, 15, 29 Jan. 2008
Japanese

界面活性剤としての両親媒性リグニンの調製及びその機能評価
本間春海, 浦木康光, 生方信, 山田竜彦, 久保智史, 日本木材学会大会研究発表要旨集(完全版)(CD-ROM), 58th, ROMBUNNO.L19-0945, 2008
Japanese

細胞壁モデルとしてのリグニン吸着ハニカムパターン化セルロースフィルム
松本千夏, 浦木康光, 平井卓郎, 玉井裕, 生方信, 日本木材学会大会研究発表要旨集(完全版)(CD-ROM), 58th, ROMBUNNO.K18-1645, 2008
Japanese

Polymerization of coniferyl alcohol by chain reaction. Another reaction for lignin formation.　　　　　　　　　　　　　　　
Cellulose Chemistry and Technology, 41, 9-10, 505, 509, 2008

Preparation and Characterization of Amphiphilic Lignin Derivatives as Surfactants
Harumi Homma, Satoshi Kubo, Tatsuhiko Yamada, Yasuyuki Matsushita, Yasumitsu Uraki, JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 28, 4, 270, 282, 2008
English

Synthesis of bromoacetophenone derivatives as starting monomers for beta-O-4 type artificial lignin polymers
Takao Kishimoto, Yasumitsu Uraki, Makoto Ubukata, JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 28, 2, 97, 105, 2008
English

構造を制御した人工リグニンの化学合成
岸本崇生, 浦木康光, 生方信, リグニン討論会講演集, 52nd, 86, 89, 31 Oct. 2007
Japanese

β‐O‐4結合定量法としてのチオアシドリシス法の評価―β‐O‐4型人工リグニンポリマーの反応の定量性から―
金澤香枝, 浦木康光, 生方信, 岸本崇生, リグニン討論会講演集, 52nd, 90, 93, 31 Oct. 2007
Japanese

リグニン重合機構の解明―モノリグノールのラジカル重合の可能性―
鈴木啓介, 浦木康光, 生方信, リグニン討論会講演集, 52nd, 152, 153, 31 Oct. 2007
Japanese

β‐O‐4結合のみからなる人工リグニンの基本的性質 II.
杉山祐介, 浦木康光, 生方信, 岸本崇生, 日本木材学会北海道支部講演集, 39, 61, 64, 22 Oct. 2007
Japanese

人工細胞壁骨格としてのハニカムパターン化セルロースフィルム
松本千夏, 浦木康光, 生方信, 玉井裕, 平井卓郎, 藪浩, 田中賢, 下村政嗣, 日本木材学会北海道支部講演集, 39, 31, 34, 22 Oct. 2007
Japanese

β‐O‐4型人工リグニンの合成研究
岸本崇生, 浦木康光, 生方信, 天然有機化合物討論会講演要旨集, 49th, 49, 575, 580, 24 Aug. 2007
The β-O-4 structure is the most abundant substructure in lignin. Artificial lignin polymers composed exclusively of the β-O-4 structure were prepared from acetophenone derivatives as starting materials. Monomers with two-carbon side chain and with three-carbon side chain were polymerized in the presence of K_2CO_3, and reduced with NaBH_4 to give artificial lignin polymers. Both polymers are linear polymers which resemble natural lignins in their structure. The weight average degree of polymerization (DP_w) was comparable to enzymatically synthesized artificial lignin from p-hydroxycinnamyl alcohols (dehydrogenation polymer, DHP) and some isolated lignins. All artificial lignin polymers were fully characterized by ^1H, ^<13>C and ^1H-^<13>C correlation 2D-NMR spectroscopy. The spectra of guaiacyl-type homopolymer and guaiacyl/syringyl-type heteropolymer with three-carbon side chain were well consistent with β-O-4 substructure in milled wood lignin from Japanese todo fir wood (softwood) and Japanese white birch wood (hardwood), respectively. Using these new lignin model polymers, it will now be possible to reinvestigate the properties and reactivity of the main lignin structure in terms of its polymeric character., Symposium on the chemistry of natural products, Japanese

ハニカムパターンセルロースフィルムの力学特性
松本千夏, 浦木康光, 生方信, 平井卓郎, 藪浩, 田中賢, 下村政嗣, セルロース学会年次大会講演要旨集, 14th, 77, 15 Jul. 2007
Japanese

Honeycomb-like architecture produced by living bacteria, Gluconacetobacter xylinus
Yasumitsu Uraki, Junji Nemoto, Hiroyuki Otsuka, Yutaka Tamai, Junji Sugiyama, Takao Kishimoto, Makoto Ubukata, Hiroshi Yabu, Masaru Tanaka, Masatsugu Shimomura, CARBOHYDRATE POLYMERS, 69, 1, 1, 6, May 2007
English

β‐0‐4型人工リグニンポリマーの合成
岸本崇生, 浦木康光, 生方信, 日本農芸化学会大会講演要旨集, 2007, 105, 05 Mar. 2007
Japanese

針葉樹リグニンのモノマーであるコニフェリルアルコールのラジカル重合の可能性
鈴木啓介, 浦木康光, 岸本崇生, 生方信, 高分子学会北海道支部研究発表会講演要旨集, 41st, 38, 06 Feb. 2007
Japanese

The Japan Wood Research Society Prize for 2006: Development of functional materials based on lignin functionality
浦木 康光, Journal of the Japan Wood Researh Society, 53, 3, A14, A16, 2007
日本木材学会, Japanese

Developement of functional materials from lignin-bearing pulp
Yasumitsu Uraki, SEN-I GAKKAISHI, 63, 1, P18, P22, Jan. 2007
Japanese, Introduction commerce magazine

β‐Ο‐4結合のみからなる人工リグニンの基本的性質―熱運動性について―
杉山祐介, 浦木康光, 生方信, 岸本崇生, 日本木材学会大会研究発表要旨集(完全版)(CD-ROM), 57th, L08-0945, 2007
Japanese

Interaction of hemicelluloses with monolignols
Yasumitsu Uraki, Atsushi Nakamura, Takao Kishimoto, Makoto Ubukata, JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY, 27, 1, 9, 21, 2007
English

異なるモノリグノール組成のDHPの調製とその分析
千葉和歌子, 岸本崇生, 浦木康光, 生方信, 齋藤香織, 福島和彦, 日本木材学会北海道支部講演集, 38, 35, 38, 31 Oct. 2006
Japanese

リグニンにおける化学構造と熱的特性の関連性について
杉山祐介, 岸本崇生, 浦木康光, 生方信, 久保智史, 日本木材学会北海道支部講演集, 38, 39, 42, 31 Oct. 2006
Japanese

リグニンによる転写因子NF‐κBの活性化の抑制
三橋進也, 岸本崇生, 浦木康光, 生方信, リグニン討論会講演集, 51st, 112, 115, 10 Oct. 2006
Japanese

酢酸リグニンの工業利用に関する研究
宮田直紀, 荻野晋一, 浦木康光, 生方信, リグニン討論会講演集, 51st, 116, 119, 10 Oct. 2006
Japanese

β‐O‐4型人工リグニンポリマーの合成とその性質―シリンギルタイプの合成―
岸本崇生, 浦木康光, 生方信, リグニン討論会講演集, 51st, 212, 213, 10 Oct. 2006
Japanese

ハニカムパターン化多糖類の調製
松本千夏, 浦木康光, 岸本崇生, 生方信, 藪浩, 田中賢, 下村政嗣, セルロース学会年次大会講演要旨集, 13th, 32, 33, 01 Jul. 2006
Japanese

Body temperature-responsive gels derived from hydroxypropylcellulose bearing lignin II: adsorption and release behavior
Y Uraki, T Imura, T Kishimoto, M Ubukata, CELLULOSE, 13, 3, 225, 234, Jun. 2006
English

A novel preparation of microcast for wood micromorphology using polydimethylsiloxane without digesting cell wall
Y Uraki, J Nemoto, Y Sano, JOURNAL OF WOOD SCIENCE, 52, 2, 163, 166, Apr. 2006
English

人工リグニンポリマーの化学合成
岸本崇生, 浦木康光, 生方信, 日本農芸化学会大会講演要旨集, 2006, 16, 05 Mar. 2006
Japanese

β-O-4構造とそのキノンメチド中間体のC_β-O結合の結合解離エネルギーの計算
岸本崇生, 重松幹二, 浦木康光, 生方信, 日本木材学会大会研究発表要旨集(完全版)(CD-ROM), 56th, 2006

微生物培養基材としてのパターン化多糖類フィルム
浦木康光, 松本千夏, 岸本崇生, 生方信, 藪浩, 田中賢, 下村政嗣, 日本農芸化学会北海道支部・日本土壌肥料学会北海道支部・日本生物工学会北日本支部・日本応用糖質科学会北海道支部・北海道農芸化学協会合同学術講演会講演要旨, 2006, 13, 2006
Japanese

Amphiphilicity of a lignin-carbohydrate complex
Yasumitsu Uraki, Yuriko Usukura, Takao Kishimoto, Makoto Ubukata, HOLZFORSCHUNG, 60, 6, 659, 664, 2006
English

Chemical synthesis of beta-O-4 type artificial lignin
T Kishimoto, Y Uraki, M Ubukata, ORGANIC & BIOMOLECULAR CHEMISTRY, 4, 7, 1343, 1347, 2006
English

風倒木の有効利用―北大ポプラ並木のパルプ化を事例として―
重冨顕吾, 中村淳, 岸本崇生, 浦木康光, 生方信, 日本木材学会北海道支部講演集, 37, 17, 20, 21 Oct. 2005
Japanese

リグニンを含有するヒドロキシプロピルセルロースゲルの熱的性質とゲスト分子との相互作用
浦木康光, 井村健, 岸本崇生, 生方信, リグニン討論会講演集, 50th, 46, 49, 07 Oct. 2005
Japanese

HBSパルプ化の実証試験―リグニン利用の可能性―
生方信, 植木飛鳥, 三橋進也, 岸本崇生, 浦木康光, 藤田進一郎, リグニン討論会講演集, 50th, 50, 53, 07 Oct. 2005
Japanese

β‐O‐4Ο型人工リグニンポリマーの合成(4)―モノマー合成ルートの短縮―
岸本崇生, 浦木康光, 生方信, リグニン討論会講演集, 50th, 146, 147, 07 Oct. 2005
Japanese

酢酸菌によるハニカムパターンセルロースの創製
浦木康光, 大塚裕之, 玉井裕, 佐野雄三, 岸本崇生, 生方信, 杉山淳司, 田中賢, 藪浩, 下村政嗣, セルロース学会年次大会講演要旨集, 12th, 89, 90, 11 Jul. 2005
Japanese

A Short Review for Current and Future Developments in Lignin Based Carbon Fibers
KUBO Satoshi, KADLA John F., URAKI Yasumitsu, Wood industry, 60, 6, 250, 255, 01 Jun. 2005
日本木材加工技術協会, Japanese

微生物を用いたパターン化セルロース構造体の創出
浦木康光, 大塚裕之, 生方信, 薮浩, 田中賢, 下村政嗣, 高分子学会予稿集(CD-ROM), 54, 1 Disk1, 2M14, 10 May 2005
Japanese

凹部にハニカムパターンを有するフィルム上での酢酸菌によるセルロース産生
大塚裕之, 浦木康光, 根本純司, 岸本崇生, 生方信, 薮浩, 田中賢, 下村政嗣, 日本農芸化学会大会講演要旨集, 2005, 159, 05 Mar. 2005
Japanese

リグニンの主要構造を持つ規則性ポリマーの合成(2)
岸本崇生, 浦木康光, 生方信, 日本農芸化学会大会講演要旨集, 2005, 21, 05 Mar. 2005
Japanese

自己分子会合能を有する木材成分
臼倉ゆり子, 浦木康光, 植木飛鳥, 岸本崇生, 生方信, 日本農芸化学会大会講演要旨集, 2005, 194, 05 Mar. 2005
Japanese

表面プラズモン共鳴を用いたモノリグノール類とヘミセルロースの相互作用解析(IV)
中村淳, 浦木康光, 岸本崇生, 生方信, 日本木材学会北海道支部講演集, 37, 2005

表面プラズモン共鳴を用いたモノリグノール類とヘミセルロースの相互作用解析(III)
中村淳, 浦木康光, 岸本崇生, 生方信, リグニン討論会講演集, 50th, 2005

Investigation on interaction of hemicelluloses with monolignols using surface plasmon resonance　　　　　　　　　　　　　　　
Proceedings of 13th International Symposium on Wood, Fiber and Pulping Chemistry, 3, 277, 281, 2005

Preparation of intelligent gels with a body-temperature response from unbleached acetic acid pulp.　　　　　　　　　　　　　　　
Proceedings of 13th International Symposium on Wood, Fiber and Pulping Chemistry, 2, 545, 551, 2005

Preparation and chracterizaton of fiberboards from waste papers bonded by lignin.　　　　　　　　　　　　　　　
Proceedings of presimposium of 13th International Symposium on Wood, Fiber and Pulping Chemistry, 1, 159, 163, 2005

T. Kishimoto, Y. Uraki and M. Ubukata: Easy synthesis of -O-4 type lignin related polymers. Org. Biomol. Chem., 3, 1067-1073 (2005).*　　　　　　　　　　　　　　　
2005

J. Nemoto, Y. Uraki, T. Kishimoto, Y. Sano, R. Funada, N. Obata, H. Yabu, M. Tanaka, M. Shimomura: Production of mesocopically patterned cellulose film. Bioresource Tech., 96, 1955-1958 (2005).*　　　　　　　　　　　　　　　
2005

Preparation of board-like moldings from composites of isolated lignins and waste paper II: effect of inorganic salt addition on board performance and evaluation of practical use of MDF
Y Uraki, J Nemoto, K Yanaga, A Koizumi, T Hirai, JOURNAL OF WOOD SCIENCE, 51, 6, 589, 594, 2005
English

“森林の科学－森林生態系科学入門－”<中村太士、小池孝良編著>　　　　　　　　　　　　　　　
朝倉書店, 2005

Body temperature-responsive gels derived from hydroxypropylcellulose bearing lignin
Y Uraki, T Imura, T Kishimoto, M Ubukata, CARBOHYDRATE POLYMERS, 58, 2, 123, 130, Nov. 2004
English

リグニンを含有するヒドロキシプロピルセルロースゲルの刺激応答性
井村健, 浦木康光, 岸本崇生, 生方信, 日本木材学会北海道支部講演集, 36, 35, 38, 28 Oct. 2004
Japanese

β‐O‐4型規則性人工リグニンポリマーの合成(2)
岸本崇生, 浦木康光, 生方信, リグニン討論会講演集, 49th, 21, 24, 20 Oct. 2004
Japanese

キチンコートしたパルプの特性
田村裕, 戸倉清一, 山本克憲, 国安春子, 浦木康光, 生方信, 高分子学会予稿集(CD-ROM), 53, 2 Disk1, 2PF160, 01 Sep. 2004
Japanese

キチンをバインダーとした木質紙の特性
田村裕, 真田陽子, 戸倉清一, 浦木康光, 生方信, セルロース学会年次大会講演要旨集, 11th, 9, 10, 01 Jul. 2004
Japanese

酢酸菌の増殖方向を制御するパターン化フィルム
根本純司, 浦木康光, 岸本崇生, 生方信, 薮浩, 田中賢, 下村政嗣, セルロース学会年次大会講演要旨集, 11th, 105, 01 Jul. 2004
Japanese

Swelling mechanism of lignin gel showing specific behavior in aqueous organic solvents.
Y Usukura, Y Uraki, T Kishimoto, M Ubukata, T Hiraoki, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 227, U311, U311, Mar. 2004
English, Summary international conference

表面プラズモン共鳴を用いたモノリグノール類とヘミセルロースの相互作用解析
浦木康光, 中村淳, 岸本崇生, 生方信, リグニン討論会講演集, 49th, 2004

LCCの両親媒的性質
臼倉ゆり子, 植木飛鳥, 浦木康光, 岸本崇生, 生方信, リグニン討論会講演集, 49th, 2004

リグノセルロースゲルの刺激応答性
浦木康光, 井村健, 臼倉ゆり子, 岸本崇生, 生方信, 日本学術会議材料研究連合講演会講演論文集, 48th, 2004

リグニンとセルロース系バイオマスから調製した種々の成形活性炭　　　　　　　　　　　　　　　
木質炭化学会誌, 1, 1, 23, 29, 2004

Delignification mechanism during high-boiling solvent pulping. Part 6: Changes in lignin structure analyzed by H-1-C-13 correlation 2-D NMR spectroscopy
T Kishimoto, A Ueki, H Takamori, Y Uraki, M Ubukata, HOLZFORSCHUNG, 58, 4, 355, 362, 2004
English

T. Imura, Y. Uraki, T. Kishimoto and M. Ubukata: Thermoresponsive gels prepared from hydroxypropylated unbleached pulp. Proceeding of The 2nd International Symposium on Technologies of Pulping, Papermaking and Biotechnology on Fiber Plants, 595-528 (20・・・　　　　　　　　　　　　　　　
2004
T. Imura, Y. Uraki, T. Kishimoto and M. Ubukata: Thermoresponsive gels prepared from hydroxypropylated unbleached pulp. Proceeding of The 2nd International Symposium on Technologies of Pulping, Papermaking and Biotechnology on Fiber Plants, 595-528 (2004).

A. Nakamura, Y. Uraki, T. Kishimoto and M. Ubukata: Analysis of adsorption behavior of monolignols onto hemicellulose using surface plasmon resonance. Proceeding of The 2nd International Symposium on Technologies of Pulping, Papermaking and Biotechnolo・・・　　　　　　　　　　　　　　　
2004
A. Nakamura, Y. Uraki, T. Kishimoto and M. Ubukata: Analysis of adsorption behavior of monolignols onto hemicellulose using surface plasmon resonance. Proceeding of The 2nd International Symposium on Technologies of Pulping, Papermaking and Biotechnology on Fiber Plants, 521-524 (2004).

“木質系有機資源の新展開”<舩岡正光監修>　　　　　　　　　　　　　　　
シーエムシー, 2004

未利用バイオマス"リグニン"の用途研究の今 : 石油代替製品から環境調和型材料へ
浦木 康光, 化学と生物, 41, 12, 784, 786, 25 Dec. 2003
日本農芸化学会, Japanese

New process for producing cellulose acetate from wood in concentrated acetic acid
H Sato, Y Uraki, T Kishimoto, Y Sano, CELLULOSE, 10, 4, 397, 404, Dec. 2003
English

未漂白パルプから調製したゲルの膨潤挙動とそれに伴う物質の放出挙動
井村健, 浦木康光, 岸本崇生, 生方信, 日本木材学会北海道支部講演集, 35, 74, 77, 15 Oct. 2003
Japanese

HBSパルプ化におけるリグニンモデル化合物の反応(2)
高森ひとみ, 岸本崇生, 浦木康光, 生方信, リグニン討論会講演集, 48th, 176, 177, 15 Oct. 2003
Japanese

ヒドロキシプロピル未漂白パルプより調製したゲルの膨潤挙動
井村健, 浦木康光, 岸本崇生, 生方信, リグニン討論会講演集, 48th, 200, 201, 15 Oct. 2003
Japanese

HBSパルプ化における脱リグニン機構の解明―リグニンモデル化合物を用いた検証―
高森ひとみ, 岸本崇生, 浦木康光, 生方信, 日本木材学会北海道支部講演集, 35, 78, 81, 15 Oct. 2003
Japanese

メゾスコピックパターンを有するセルロースフィルムの調製
根本純司, 浦木康光, 岸本崇生, 生方信, 田中賢, 下村政嗣, 日本木材学会北海道支部講演集, 35, 25, 28, 15 Oct. 2003
Japanese

リグニンゲルの膨潤と応用
臼倉ゆり子, 浦木康光, 岸本崇生, 生方信, 平沖敏文, 福島和彦, リグニン討論会講演集, 48th, 202, 205, 15 Oct. 2003
Japanese

β‐O‐4結合からなる規則性人工リグニンポリマーの化学合成
岸本崇生, 浦木康光, 生方信, リグニン討論会講演集, 48th, 68, 71, 15 Oct. 2003
Japanese

リグニン誘導体が形成するLangmuir-Blodgett膜の構造―TOF-SIMSによる解析―
臼倉ゆり子, 浦木康光, 岸本崇生, 生方信, 加藤俊之, 福島和彦, 日本木材学会北海道支部講演集, 35, 70, 73, 15 Oct. 2003
Japanese

HBSパルプ化におけるリグニンの構造変化―チオアシドリシス及びNMRによる解析(2)―
植木飛鳥, 斉藤香織, 福島和彦, 岸本崇生, 浦木康光, 生方信, リグニン討論会講演集, 48th, 178, 179, 15 Oct. 2003
Japanese

T. Kishimoto, H. Tsuji, Y. Uraki and Y. Sano: Ozone bleaching of atmospheric acetic acid pulp from Betula platyphylla var. japonica Hara. Holzforschung, 57, 181-188 (2003).*　　　　　　　　　　　　　　　
2003

Y. Usukura, Y. Uraki, T. Kishimoto and Y. Sano: Characterization of amphiphilic lignin derivative-Formation of Langmuir Blodgett film and Gel. Proceedings of 12th International Symposium on Wood and Pulping Chemistry, vol.1, 329-332 (2003).　　　　　　　　　　　　　　　
2003

J. Nemoto, Y. Uraki and Y. Sano:Preparation of fiberboards from waste papers and isolated lignins. Proceedings of 12th International Symposium on Wood and Pulping Chemistry, vol.1, 219-222 (2003).　　　　　　　　　　　　　　　
2003

リグニン-古紙複合物を原料とするボード状成形物の作製とその特性　　　　　　　　　　　　　　　
木材学会誌, 49, 287, 292, 2003

Catalytic graphitization of hardwood acetic acid lignin with nickel acetate
S Kubo, Y Uraki, Y Sano, JOURNAL OF WOOD SCIENCE, 49, 2, 188, 192, 2003
English

M. Nishida, Y. Uraki and Y. Sano: Lignin gel with unique swelling property. Bioresource Tech., 88, 81 – 83 (2003).*　　　　　　　　　　　　　　　
2003

セルローステクノロジー セルロース系ポリマーブレンドによるポリウレタンの吸湿性の改善
浦木 康光, 糸山 光紀, Cellulose communications, 9, 4, 216, 220, 2002
セルロ-ス学会, Japanese

M. Mustafaev, Z. Mustafaeva, E. Ergen, Y. Uraki, Y. Sano: Novel betulin-containing polyelectrolyte conjugates. Journal of Bioactive and Compatible Polymers, 17(4), 251-269 (2002).*　　　　　　　　　　　　　　　
2002

Y. Miharu, Y. Uraki, K. Itoyama, F. Miyazawa, Hi. Tanibe and Y. Sano: Improvement of moisture sorption of polyurethane fiber by blending cellulose. Sen-i Gakkaishi, 58, 375-380 (2002).*　　　　　　　　　　　　　　　
2002

Preparation of activated carbon moldings from the mixture of waste newspaper and isolated lignins: mechanical strength of thin sheet and adsorption property
Y Uraki, S Kubo, Y Sano, JOURNAL OF WOOD SCIENCE, 48, 6, 521, 526, 2002
English

Bacterial cellulose production using monosaccharides derived from hemicelluloses in water-soluble fraction of waste liquor from atmospheric acetic acid pulping
Y Uraki, M Morito, T Kishimoto, Y Sano, HOLZFORSCHUNG, 56, 4, 341, 347, 2002
English

S. Kubo, Y. Uraki and Y. Sano: "Catalytic graphitization of hardwood acetic acid lignin with nickel (II) acetate.", Proceedings of11th Internatiuonal Symposium on Wood and Pulping Chemistry, vol. 2, 115-118 (2001).　　　　　　　　　　　　　　　
2001

Preparation of activated carbon fibers with large specific surface area from softwood acetic acid lignin
Y Uraki, A Nakatani, S Kubo, Y Sano, JOURNAL OF WOOD SCIENCE, 47, 6, 465, 469, 2001
English

Y. Uraki, M. Morito, T. Kishimoto and Y. Sano: "Conversion of hemicellulose sugar to carbon resources for bacterial cellulose production.", Proceedings of 11th Internatiuonal Symposium on Wood and Pulping Chemistry, vol. 2, 111-114 (2001).　　　　　　　　　　　　　　　
2001

Preparation of amphiphilic lignin derivative as a cellulase stabilizer
Y Uraki, N Ishikawa, M Nishida, Y Sano, JOURNAL OF WOOD SCIENCE, 47, 4, 301, 307, 2001
English

M. Nishida, Y. Uraki and Y. Sano: "Preparation of lignin based hydrogel and its interaction with amphiphilic compounds.", Proceedings of11th Internatiuonal Symposium on Wood and Pulping Chemistry, vol. 2, 43-46 (2001).　　　　　　　　　　　　　　　
2001

Optical properties and photopolymerization of liquid crystalline (acetyl) (ethyl) cellulose/acrylic acid system
S Shimamoto, Y Uraki, Y Sano, CELLULOSE, 7, 4, 347, 358, Dec. 2000
English

Activated carbon sheet prepared from softwood acetic acid lignin
Y Uraki, R Taniwatashi, S Kubo, Y Sano, JOURNAL OF WOOD SCIENCE, 46, 1, 52, 58, 2000
English

Self-assembly of pulp derivatives as amphiphilic compounds: Verification of molecular association and complexation with low and high molecular mass compounds
Y Uraki, A Hanzaki, K Hashida, Y Sano, HOLZFORSCHUNG, 54, 5, 535, 540, 2000
English

HBS Pulping (1):Pulping of Softwood
Kajimoto Junko, Sano Yoshihiro, Widodo Wahyu Eko, Kishimoto Takao, Uraki Yasumitsu, Journal of the Japanese Technical Association of the Pulp and Paper Industry, 54, 9, 1252, 1259, 2000
In order to develop a new pulping process with non-pollution and saving energy, softwood was subjected to pulping with 60-90% HBSs, such as 1, 4-butanediol, 1, 3-butanediol and tetrahydrofurfuryl alcohol, containing 0-10% AcOH at 200-220°C. Todomatsu (A. Sachalinensis Mast.). ezomatsu (P. Glehnii Mast.), karamatsu (L. leptolepis Gordon) and sugi (Cryptomeria japonica D. Don) were easily pulped with aqueous HBS of 70% such as butanediol-1, 4 containing 5% AcOH at 220°C for 1-2h. AcOH promoted the delignification reaction. HBS such as tetrahydrofurfuryl alcohol. butanediol-1, 3 and proplylene glycol were used with satisfactory results for HBS pulping. RHBS, which was obtained by separation of water insolubles such as HBS lignin and evaporation of water from waste liquor, was able to be reused at least five times as a HBS pulping solvent. The higher yield of HBS lignin than the amount of wood lignin is indicates that modified sugar compounds are recovered with the lignin as water insolubles. Pulp showed the strength properties equivalent to those of kraft pulp except tear index., JAPAN TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY

Y. Uraki, Y. Miharu, R. Funada, Y. Sano, M. Mitsuhashi, K. Itoyama and H. Tanibe: "Preparation and Characterization of Alginate-blended Rayon"., Sen-i Gakkaishi, 56, 482-486(2000).＊　　　　　　　　　　　　　　　
2000

『ウッドケミカルスの最新技術』<飯塚尭介, 監修>　　　　　　　　　　　　　　　
シーエムシー, 2000

Polyhydric alcohol pulping at atmospheric pressure: An effective method for organosolv pulping of softwoods
Y Uraki, Y Sano, HOLZFORSCHUNG, 53, 4, 411, 415, 1999
English

Y. Urakj, N. Ishikawa, M. Nishida and Y. Sano: "Stabilization of cellulase with amphiphilic acetic acid lignin derivative", Proceedings of 10th Internatiuonal Symposium on Wood and Pulping Chemistry, vol. I, 470-473 (1999).　　　　　　　　　　　　　　　
1999

S. Kubo, Y. Uraki Y. Sano and K.-l. Chen: ”Preparation of functional carbonaceous materials from isolated lignins”, Proceedings of10th Internatiuonal Symposium on Wood and Pulping Chemistry, vol. III, 388-393 (1999).　　　　　　　　　　　　　　　
1999

Antimicrobial Activity of Lignocellulose Film Containing Chitosan
URAKI Y., SANO Y., ITOYAMA K., TANIBE H., キチン・キトサン研究 = Chitin and chitosan research, 4, 2, 150, 151, 15 May 1998
Japanese

リグニンを原料とする炭素材料の開発
浦木 康光, 久保 智史, Cellulose communications, 5, 1, 19, 23, Apr. 1998
セルロ-ス学会, Japanese

Preparation of carbon fibers from softwood lignin by atmospheric acetic acid pulping
S Kubo, Y Uraki, Y Sano, CARBON, 36, 7-8, 1119, 1124, 1998
English

Atmospheric Acetic Acid Pulping of Rice Straw(1). Pulping conditions and properties of pulp.:Pulping conditions and properties of pulp
Pan Xue-Jun, Sano Yoshihiro, Nakashima Hiroshi, Uraki Yasumitsu, Journal of the Japanese Technical Association of the Pulp and Paper Industry, 52, 3, 408, 415, 1998
In order to make use of rice straw (Oryza sativa L. cv. Kirara 397) as agricultural wastes effectively and to develop a novel pulping method for rice straw without environmental impact, an atmospheric acetic acid pulping was studied. The results indicated that the acetic acid pulping process is a promising method for rice straw. The straw gave screened pulps with satisfactory strength properties when refluxed in 80-90% aqueous AcOH with 0.32% H₂SO₄ or 0.10% HCl as catalyst for 3 hours. The aqueous AcOH was recovered from the waste liquor and AcOH washings by distillation without troublesome problems, and AcOH lignin and water solubles as sugars were prepared as by-products from the concentrated waste liquor by fractional precipitation with water. The ash contents in screened pulp, fines, water solubles and AcOH lignin were about 18, 24, 18 and 1.5%, respectively. The ash in the pulp and fines consisted mainly of silica which located not in fiber and parenchyma cells but only in epidermal cells as shown by a SEM-EDXA photograph. The silica left in the pulp may function as a filler of paper., JAPAN TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY, Japanese

Y.-G. Kim, N. Watanabe, Y. Sano, Y. Uraki and Y. Sano:"Extractives of Kitakobushi Magnolia Kobus DC. var. borealis Sarg. III. -Antibacterial and Antifungal Activity of Extractives.-", Research Bulletin of The Hokkaido University Forests, 55, 63-73 (・・・　　　　　　　　　　　　　　　
1998
Y.-G. Kim, N. Watanabe, Y. Sano, Y. Uraki and Y. Sano:"Extractives of Kitakobushi Magnolia Kobus DC. var. borealis Sarg. III. -Antibacterial and Antifungal Activity of Extractives.-", Research Bulletin of The Hokkaido University Forests, 55, 63-73 (1998)*

Self-assembly of pulp derivatives as amphiphilic compounds: Preparation of amphiphilic compound from acetic acid pulp and its properties as an inclusion compound
Y Uraki, K Hashida, Y Sano, HOLZFORSCHUNG, 51, 1, 91, 97, 1997
English

Preparation of lignin fibers from softwood acetic acid lignin - Relationship between fusibility and the chemical structure of lignin
S Kubo, N Ishikawa, Y Uraki, Y Sano, MOKUZAI GAKKAISHI, 43, 8, 655, 662, 1997
English

Uraki, Y., Chen, C. -L. and Gratzl, J. : "Sonolysis of Chloro-Organics in Bleach Plant E-1 Effluents", Holzforschung, 51 : 452-458 (1997)＊　　　　　　　　　　　　　　　
1997

Uraki, Y., Kubo, S. and Sano, Y. : "Characteristics of Activated Carbon Fibers Prepared from Acetic Acid Lignin", Proceedings ATC '97 The 4th Asian Textile Conference, 1 : 36-41 (1997)　　　　　　　　　　　　　　　
1997

Uraki, Y., Kubo, S., Kurakami, T., and Sano, Y. : "Activated Carbon Fibers from Acetic Acid Lignin", Holzforschung, 51(2) : 188-192 (1997)＊　　　　　　　　　　　　　　　
1997

S. Kudo, Y. Uraki and Y. Sano : "Thermomechanical Analysis of Isolated Lignins", Holzforschung, 50 : 144-150 (1996)＊　　　　　　　　　　　　　　　
1996

Pulping at Atmospheric Pressure with Aqueous Acetic Acid Containing Sulfuric Acid：Pulping of Hokkaipopula (improved balsam poplar), Ezonokinuyanagi (Salix pet-susu Kimura) and Nagabayanagi (Salix sachalinensis Fr. Schm.)
佐野 嘉拓, 山村 孝次, 浦木 康光, 笹谷 宜志, 千葉 茂, Research bulletin of the Hokkaido University Forests, 49, 2, p277, 287, 1992
北海道大学農学部演習林, Japanese

Cooking of hardwoods with organosolv pulping in aqueous acetic acid containing sulfuric acid at atmospheric pressure
URAKI Y, Kami-pa Gikyoshi, 45, 1018, 1024, 1991

エレクトロスプレー/スピニング法とその応用 : 材料合成・成形・加工技術
浦木康光, 木材成分セルロースとリグニンのエレクトロスピニング
シーエムシー出版, Mar. 2021, 9784781315928, 9,341p, Japanese, [Joint work]

表面技術　　　　　　　　　　　　　　　
浦木康光, 蓄電デバイス用セパレータ
Jun. 2020, [Joint work]

リグニン利活用のための最新技術動向
浦木康光, リグニンの単離・改質とリグニンを活用した機能性材料の開発
シーエムシー出版, Mar. 2020, 9784781314945, iv, 227p, Japanese, [Joint work]

加工技術　　　　　　　　　　　　　　　
浦木康光, リグニンを主原料とするポリエステルフィルムの調製とその利用
May 2018, [Joint work]

木質の化学　　　　　　　　　　　　　　　
文永堂出版, 2010

「機能性リグニン－多糖複合体の開発」　　　　　　　　　　　　　　　
シーエムシー出版, 2007

Development of functional lignin-carbohydrate complex　　　　　　　　　　　　　　　
CMC Publisher, 2007

Nov. 2018 - Present
リグニン学会　　　　　　　　　　　　　　　

Clarification of propagation reaction for lignin formation by using artificial polysaccharide matrix
Grants-in-Aid for Scientific Research
05 Apr. 2021 - 31 Mar. 2026
浦木 康光, 堤 祐司, 玉井 裕, 綿岡 勲, 鈴木 栞, 重冨 顕吾
当該年度は、3つの課題について検討を行い、以下の成果を得た。
1. rCWPO-Cの高純度化と多量発現：組換体大腸菌によるタンパク質の発現と精製工程にいて、TAPS化とリフォールディングの間に遠心分離を2回の行う操作を加えた。この結果、精製rCWPO-Cの収率を維持したまま、ペルオキシダーゼの精製度を示すRZ値が約1.5倍に増加し、比活性も約1.5倍の560μmol/min/mgまで向上した。
2.細胞壁構成多糖類間および多糖類-ペルオキシダーゼ間のの相互作用解析：木材のヘミセルロース（キシラン、グルコマンナン、キシログルカン）とセルロースとの相互作用を、平衡吸着実験と速度論的解析が可能なQCM-Dを用いて行った。両測定とも、キシログルカンがセルロースに最も吸着することが明らかとなった。また、Horseradish peroxidase(HRP)と多糖類との相互作用解析では、HRPはセルロースに対し、高い親和性を示すことも分かった。さらに、多糖類が脱水素重合体(DHP)の形成に及ぼす影響も調べ、キシログルカンがDHPを多量生成させ、加えて、5-5’縮合結合の形成も促進することが示された。この結果より、一次細胞壁が縮合構造に富む理由が解明できた。
3.高分子リグニンの蛍光共鳴エネルギー移動（FRET)の測定：FRET測定の最初の取り組みとして、固体試料を対象とした蛍光顕微鏡でFRETが示されているリグニンと蛍光試薬ローダミンとの相互作用を、溶液中で検出することから検討した。使用したリグニンは広葉樹のクラフトリグニンである。この測定の結果、プロピレングリコールを溶媒とする溶液中で、FRETを観測することができた。モノリグノールとクラフトリグニンとのFRETの検出を試みたが、どちらも蛍光強度が弱かったために、明確なFRET検出には至っていない。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 21H04730

Investigation of lignin formed in the mimetics of wood cell wall and clarification of lignification-related compounds
Grants-in-Aid for Scientific Research
01 Apr. 2018 - 31 Mar. 2021
Uraki Yasumitsu
This study clearly demonstrated the effect of hemicelluloses on ligninfication through lignin formation in the artificial polysaccharide matrices; xylan contributed to lignin formation and generation of 8-O-4' interunitary linkage, which was a major linkage in native lignin, while glucomannan inhibited lignin formation. In addition, xyloglucan, which located only at primary wall of tree, was found to enhance the frequency of 5-5' interunitary linkage.
From the analysis of solution structure for isolated lignins by using size-exclusion chromatograph equipped with multi-angle laser light scattering detector, 5-5' linkage was found to be closely related to the densed structure, especially much compact structure of lignin fraction with larger molar mass compared to that with small molar mass.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 18H03954

Lignification in polysaccharide matrix mimicking wood cell wall and clarification of lignin structure -control factor
Grants-in-Aid for Scientific Research
27 Jun. 2014 - 31 Mar. 2018
Uraki Yasumitsu
An aim of this study is to elucidate lignin formation mechanism (lignification), especially influence of hemicelloses, with polysaccharide matrix mimicking wood cell wall structure. Polysaccharide matrix was successfully prepared by the deposition of hemicelluloses, xylan and glucomannan, onto bacterial cellulose. Dehydrogenative polymerization of coniferyl alcohol, which was one of monolignols, was attempted in the presence of such polysaccharide matrix. As a result, the polymerization was accelerated by xylan deposition, but was inhibited by glucomannan.
In addition, the structure of the resultant polymerized product (Dehydronation Polymer: DHP) was investigated on a size-exclusion chromatography equipped with a laser light-scattering detector by the comparison with solution structure of a non-branched lignin model compound that is comprised of only 8-O-4’ linkage. This investigation revealed that DHP had a significant frequency of branched structure.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 26252022

Clarification of hemicellulose functions using artificial wood cell wall and development of its functional materials
Grants-in-Aid for Scientific Research
2009 - 2011
URAKI Yasumitsu, TAMAI Yutaka, KODA Keiichi, HIRAI Takuro, SUGIYAMA Junji
In this study, hemicellulose-adsorbed honeycomb-patterned cellulose films termed as artificail wood cell wall were developed to investigate the function of hemicelluloses in wood cell wall and to develop the cell culture for liver cells. Tensile strength and its modulus of the cellulosic films were enhanced by the adsorption of hemicelluloses, xylan and arabinogalactan (AG). Xylan adsorption and its tensile modulus were improved by microwave irradiation. We judged proposed theory for the elucidation of deformation mechanism of wood cross-scetion upon the mechanical stress from the tensile properties of honeycomb-patterned films. As a result, the theory of bending-stretching model was suitable for the elucidation, and xylan-adsorbed film showed more fitting to the theory.
In addition, we evaluated AG-adsorbed honeycomb-patterned film as a culture substrate for mouse liver cells. The films with small pores were found to be a new type candidate substrate for the culture. On the other hand, the films with larger pores would be suggested to be a plate for cell array, but the number of attached cell was so small. For the industrial application, this problem should be overcome.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 21380104

Optimization of tropical peatland management based on carbon flow control
Grants-in-Aid for Scientific Research
2007 - 2010
INOUE Takashi, HIRANO Takashi, HATANO Ryusuke, TANI Hiroshi, SAITOU Hideyuki, TAMAI Yutaka, OSAKI Mitsuru, HATA Hiroshi, HASHIDOKO Yasuyuki, URAKI Yasumitsu, TAWARAYA Keitaro, HARAGUCHI Akira, ABE Ryuichiro
Tropical peat land is a huge carbon sink involving an ecosystem that is very fragile but rich in biodiversity. This study deployed on establishment of measures for optimum land use and land management based on the viewpoint of control of carbon flow in tropical peatland. Prevention of peat fire, restoration of devastated land, sustainable bioproduction, and the reduction of environment load are the special interest that is rendered for the approach.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 19255016

Creation of cellulosic materials mimicking secondary wall structure in tree cell wall
Grants-in-Aid for Scientific Research
2006 - 2008
URAKI Yasumitsu, HIRAI Takuro, TAMAI Yutaka, KISHIMOTO Takao, SUGIYAMA Junji
樹木細胞壁の二次壁の特徴は、他の壁組織に比べ多量に存在するリグニンとその化学構造である。本研究では、二次壁模倣材料の創出を目的に、二次壁リグニン模倣高分子を創製して、その物性を明らかにした。さらに、ハニカムパターン化セルロースにリグニンを吸着させて二次壁模倣セルロース材料を創製して、その物性解析からリグニンが高湿度における細胞壁の強度低下を抑制することを見出すと共に、木材成分のみで高強度材料を創出できることを明らかにした。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 18380100

Creation of artificial cell wall by mimicking the process of natural cell wall formation
Grants-in-Aid for Scientific Research
2003 - 2005
URAKI Yasumitsu, TAKABE Keiji, FUKUSHIMA Kazuhiko, KONDO Tetsuo, FUNADA Ryo, TAMAI Yutaka
An aim of this research is to clarify the construction mechanism of tree cell wall that had the hierarchical structure from molecular level to tissue level. In addition, our objective is to create an artificial cell wall by mimicking the formation process of natural wood cell wall on the basis of the results of former subjects. In this research project, we obtained experimental results and conclusions for five subjects.
Conclusion 1.Xylan is a key hemicellulose for lignification.
Conclusion 2.This finding for ConClusion 1 was supported by physicochemical analysis of the interaction between hemicelluloses and lignification-related compounds. These analyses were carried out on an apparatus based on the surface plasmon resonance.
Conclusion 3.We clarified solution behavior of LCC in water, such as interaction of solvent, self-assembly of LCC molecules and formation of hydrophobic domain in the self-aggregates. We proposed LCC functions in the wood from these results.
Conclusion 4.we developed a new analysis method, Time of Flight・Secondary Ion Mass spectroscopy (ToF-SIMS), for lignin structure, and artificial lignin polymer, which was merely comprised of β-O-4, as a lignin model for NMR assignment.
Conclusion 4 We elucidate the cell wall formation at the cell level in relation to cell-supported proteins, microtubles and actin in addition to tissue formation.
Conclusion 5.we developed a methodology to create artificial cell wall on the basis of findings obtained in this study.
The artificial cell wall backbone was fabricated by the conversion of bacterial cellulose to honeycomb-patterned material. The conversion was carried out by the control of the movement of cellulose-producing bacteria.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 15208016

人工細胞壁の創製　　　　　　　　　　　　　　　
科学研究費補助金
2002
Competitive research funding

Creation of artificial cell wall　　　　　　　　　　　　　　　
Grant-in-Aid for Scientific Research
2002
Competitive research funding

ESTABLISHMENT OF BIOMASS CONVERSION INDUSTRY IN HOKKAIDO
Grants-in-Aid for Scientific Research
1999 - 2001
SANO Yoshihiro, TABARA Masayoshi, URAKI Yasumitu, SHINOHARA Kunio, KISHIMOTO Takao
There are a large quantity of birch tree fast-growing in a cold district, and also poor-grade biomass materials such as thinning and agricultural wastes in Hokkaido, but they have been utilized less effective use or discarded. We carried out a fundamental investigation to establish a novel biomass-conversion mill in Hokkaido to convert their biomass materials to green chemicals, fine chemicals, biodegradation plastics, bioenergy and so forth.
We established two biomass refinery processes with non-pollution and save-energy. One is an atmospheric acetic acid method and another HBS method. Birch wood and other biomas materials were easily fractionated into cellulose, lignin and/or hemicellulose in almost quantitative yields. The resulting cellulose had excellent properties for paper and dissolving pulps, and biochemicals. Hemicellulose obtained as monosaccharides from the former can be used for biochemicals and food additives. Lignin can be utilized for biofuel with clean and high calorific value, and functional biopolymers (epoxide, phenol-resorcinol and maybe polyurethane resins), molding active carbons and so forth.
Betulin was extracted with acetic acid and other solvents in a yield of 30% from outer bark of birch. Betulin appears to be used as raw materials for fine chemicals, biodegradation polymers, and medicine such as anti-HIZ agents.
Japan Society for the Promotion of Science, Grant-in-Aid for University and Society Collaboration, HOKKAIDO UNIVERSITY, 11793013

DEVEPOLPMENT OF NOVEL PHAPULPING PROCESS BY ORGANIC SOLVENTS SELF-SUPPLIED FROM BIOMASS
Grants-in-Aid for Scientific Research
1998 - 2000
SANO Yoshihiro, KISHIMOTO Takao, URAKI Yasumitsu
Polyhydric alcohol (PHA) pulping was developed to separate components of low-quality softwoods that are produced by thinning and improvement cutting as well as to establish a new pulping process with solvent self-supplied from wood. Proplylene glycol (PG) was superior to ethylene glycol (EG) as solvent for PUA pulping at atmosphereic pressure. PHA pulping of fir, larch and cedar with PG containing sulfuric acid as a catalyst gave satisfactory pulps with few rejects and a very low level of residual lignin as compared with that with EG.PG pulps were readily bleached to approximately Kappa number 1 and 80% brightness by one treatment with sodium chlorite. The bleached pulp of fir was obtained in a yield of 44.7% of chips, had very high α-cellulose content and crystallinity, and had thesimilar strength properties to those for kraft pulp. Therefore, PHA pulping apperas to be promising for pulping of softwood, hardwood and nonwood.
Lignins were isolated and freezing-dried from spent liquors in PHA pulping of fir and birch. Both the lignins were obtained in almost quantitative yields, dissolved with conventional aqueous lignin-solvents such as acetone, dioxane and pyridine, and further hot-melted. Each content of carbon was higher than those for corresponding acetic acid lignin and protolignin. Lignins of birch and fir chips had lower weight average-molecular weight of 670-710 and 720-830 than those for corresponding actic acid lignins and MWLs.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B)., HOKKAIDO UNIVERSITY, 10556035

両親媒性リグノセルロース誘導体と生体高分子との相互作用の解明
科学研究費助成事業
1998 - 1999
浦木 康光
リグニンを含むパルプをリグノセルロースと見なし、ヒドロキシプロピル化により、水及び有機溶媒に可溶な両親媒性誘導体を調製した。本年度は、両親媒性誘導体と生体高分子との相互作用による生体高分子の構造変化について検討した。さらに、相互作用を解明する基礎研究として、この誘導体の水溶液中の構造及び温度変化による形態変化についても検討を加え、この誘導体の基本的物性と利用法について考察した。
牛血清アルブミン(BSA)を生体高分子として用い、誘導体との相互作用による形態変化を円二色性スペクトルにより調べた。BSAはリン酸緩衝液中で48時間2次構造変化は起こさなかったが、96時間以降α-helix構造に由来するコットン効果が減少して変性することが示された。一方、誘導体が存在してもBSAのスペクトルは変化せず、122時間後でも構造が保たれていることが分かった。このことは、誘導体が生体高分子を取り込むような相互作用をしていることを示唆しているが、その作用は生体高分子の構造を変化させるほど強くなく、単に運動性を抑制して変性を妨げていることを意味していると思われる。
物質の取り込み現象を明らかにするために、先ず、誘導体の溶液構造を検討した。X線小角散乱から、この誘導体分子はかなり剛直な棒状高分子であることが示された。光散乱より、誘導体の会合物は球状の構造をしており、これらの結果、残存リグニンが棒状高分子を結びつけ巨大な球状構造を形成していることが明らかになった。また、誘導体は残存リグニン量が多くなると下限共溶臨界温度が低下して、体温付近で沈殿現象を生じることが示され、球状構造の空隙に取り込んだ物質を温度上昇で放出する温度感応性物質として利用できることが分かった。
日本学術振興会, 奨励研究(A), 北海道大学, 10760102

Fractionation of main components in wind-fallen and thinning woods by continuous extraction with solvents at atmospheric pressure for utilization of poor-grade woods
Grants-in-Aid for Scientific Research
1994 - 1996
SANO Yoshihiro, TAKAI Mitsuo, OZAWA Shuji, URAKI Yasumitsu
Poor-grade woods obtained from thinning, storm-fallen-down and short-rotation trees were subjected to pulpings by continuous extraction systmes with organic solvents in order to utilize valuable products. The woods from most of hardwood such as birch, poplar and beech, and from spruce and todomatsu (Abies sachalinensis Masters.) as softwood were possible to be separated into AcOH pulp, hemicellulose and lignin quantitatively by a solvent pulping system with aqueous acetic acid containing a small amount of sulfuric acid or hydrochloric acid at reflux temperatures. However, thinning woods from larch and sugi (Cryptomeria japonica D.Don) yielded PHA pulps with large amounts of residual lignin by this pulping process. The larch and sugi woods were possible to be pulped by a novel polyhydric alcohol process either with sulfuric acid at reflux temperature or with acetic acid at higher temperatures. Acetic acid and polyhydric alcohols for pulping solvents may be prepared from wood polysaccharides.
AcOH pulps had satsfactory properties for paper-making. The water solubles recovered as sugars from the waste liquor consisted mainly of monosaccharides such as xylose, mannose and so forth. The sugars appear to be utilized as diet sweeteners, medicines and chemicals. AcOH lignin could be converted to carbon fibers and fibrous active carbon with good quality by use of simple and economical methods because it has the characteristic hot-melting. PHA pulps had the properties for paper-grade and dissolving pulps. Lignin was recovered in quantity from the waste liquor. Hemicelluolse obtained together with the pulping solvent may be used several times for pulpings without recovery and conversion.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), HOKKAIDO UNIVERSITY, 06556026

Three-dimentional images of deposition of microfibrils and matrix substances in the cell wall
Grants-in-Aid for Scientific Research
1994 - 1995
SANO Yoshihiro, KOJIMA Yasuo, URAKI Yasumitsu, SANO Yuzou, FUNADA Ryo, OHTANI Jun
The arrangement of cortical microtubules (MTs) in differentiating tracheids of conifers was examined by confocal laser scanning microscopy after immunofluorescent staining. The arrays of MTs in the tracheids during formation of the primary wall were not well ordered and the predominant orientation changed from longitudinal to transverse. During formation of the secondary wall, the arrays of MTs were well ordered and their orientation changed progressively from a flat S-helix to a steep Z-helix and then to a flat S-helix as the differentiation of tracheids proceeded. The orientation of cellulose microfibrils (MFs) on the innermost surface of cell walls observed by FE-SEM changed in a similar manner to that of the MTs. The MFs changed their orientation, with clockwise rotation (viewed from the lumen side), from a flat S-helix to a steep Z-helix and then from a steep Z-helix to a flat S-helix during the formation of secondary wall. These results provide strong evidence for the co-alignment of MTs and MFs during the formation of the semi-helicoidal texture of the cell wall in conifer tracheids. No tracheids in which the MTs had been disassembled were observed in any radial series during the successive steps of differentiation. The orientation of MTs might change progressively without depolymerization of MTs, supporting the dynamic helical model. On the basis of our results, we propose a model for the orientation of MTs and MFs during the differentiation of tracheids.
Japan Society for the Promotion of Science, Grant-in-Aid for General Scientific Research (A), HOKKAIDO UNIVERSITY, 06404013

リグニンの液晶紡糸に関する研究
科学研究費助成事業
1993 - 1993
浦木 康光
1.緒言 本研究の目的は、硫酸触媒による常圧酢酸パルプ化法によって得られるリグニン(AWL)から液晶を生成する物質を調整し、最終的に液晶紡糸を行うことであった。液晶物質の調整法として2法考えられ、1つはアルキル鎖の導入やメソ-ゲンとなる官能基導入などのAWLの化学修飾による改質である。もう1つは、高機能の炭素繊維を調整するためピッチ系原料で用いられている加熱によるメソフェーズいわゆる液晶の調整である。2番目の方法は、不均一構造の物質を熱分解と同時に、熱縮合を生じさせて、できるだけ均一構造の会合体を作り液晶を発現させるもので、不均一構造を有するリグニンの液晶化には、簡便で好適な方法と思われた。そこで、この研究では、加熱条件を変えての液晶生成を検討し、走査型電子顕微鏡(SEM)、偏光顕微鏡や熱分析により液晶生成を評価した。
2.実験 (1)AWLの液晶化:AWLを空気中の開放系及びミクロオートクレーブを用いた窒素雰囲気下で昇温速度3℃/minで160℃から430℃まで加熱し、所定温度を40minまたは90min維持した。熱処理AWLのキノリン不溶部を液晶画分としてろ過で回収し、エタノールで洗浄後減圧乾燥した。(2)顕微鏡観察:キノリン不溶部をSEM及び偏光顕微鏡により観察した。
3.結果 AWLを430℃で90min加熱した試料は、SEMでメソフェーズと思われる小球体の形成が観察された。さらに、偏光顕微鏡観察から超薄片部分にクロスニコル下での発光が観察され、液晶の生成を示唆する結果が得られた。また、160℃や250℃でもSEMよりピッチ系メソフェーズでも観察されるサンゴ状組織が見られたが、偏光観察からは液晶の形成は観察されなかった。高温処理試料は、示差走査熱量分析から液晶の熱相転移に起因すると考えられる吸熱ピークが観測され、リグニン液晶がサーモトロピック液晶に近い熱挙動を示すことが示唆された。現在、この液晶の構造を電子線解析により調べると共に、紡糸条件について検討している。
日本学術振興会, 奨励研究(A), 北海道大学, 05760131

APPLICATION OF PEN SHEET TO ARTIFICIAL SKIN AND MANUFACTURING OF CONTINUOUS PAPER-MAKING MACHINE
Grants-in-Aid for Scientific Research
1991 - 1992
TAKAI Mitsuo, SUGIYAMA Sadao, FUJIWARA Masashi, SHIMIZU Yu-ichi, URAKI Yasumitsu, TOKURA Seiichi
High resolution ^<13>C NMR spectra of alpha-chitin and beta-chitin in solid state can be distinguished from each other as well as the x-ray patterns or IR spectra. alpha-Chitin from crab or shrimp shell is known to be slightly soluble in general organic solvents and to have poor reactivity due to its rigid crystalline structure. beta-Chitin, on the other hand, from squid bone of Loligo pen, easily forms slurry when it was ground with water. This is responsible for the loose crystalline structure and the high hydrophilicity of Loligo pen chitin. Therefore it is much easier to prepare the paper sheet from beta-chitin than alpha-chitin without binder. Direct sheet preparation from Loligo pen gel is economically of greater advantage than nonwoven sheet from crab shell. The hand-made chitin paper from Loligo pen shows a high bursting factor of 7.4 and breaking length of 6.9 Km, compared with those of alpha-chitin from crab shell, 1.0 and 3.0 Km. The Loligo pen paper is obviously softer than that from crab shell as to rigidity or stiffness calculated from Young modulus. Furthermore the higher permeability of moisture together with water regain, a strong affinity for blood protein such as fibrinogen, albumin or gamma-globulin, and slow biodegradation by lysozyme were observed. Thus the pen sheet seems to be more suitable for temporarily artificial skin.
In this report, the direct preparation of chitin sheet from mechanically beated loligo pen chitin was investigated. A continuous paper-making machine for the chitin was designed in bench scale and constructed in our Machine Shop. Paper of 30m long and 80mm wide can be prepared by the machine at the speed of 0.5m/min.
Japan Society for the Promotion of Science, Grant-in-Aid for Developmental Scientific Research (B), HOKKAIDO UNIVERSITY, 03555187

パルプ廃液中リグニンの化学修飾による多機能性高分子材料化に関する研究
科学研究費助成事業
1991 - 1991
浦木 康光
日本学術振興会, 奨励研究(A), 北海道大学, 03760106

Separation and Utilization of Woody Biomass by Boilingaqueous Acetic Acid Containing Acid Catalyst.
Grants-in-Aid for Scientific Research
1989 - 1991
SANO Yoshihiro, URAKI Yasumitu, SASAYA Takashi
Separation and utilization of woody biomass were investigated by aqueous acetic acid of commercial hardwood chips(oak, alder, mangrove)with a catalst of sulfuric acid. When chips were boiled in 90% aqueous acid for 45 min, the chips-were filtrated. After repeated this pretreatment, they were cooked in a new 90% aqueous acetic acid with 0.32-0.40% H_2SO_4 for 3-4 h. Alder was easily pulped, but mangrove was done with a best deal of difficulty and produced a lot of reject. When the reject was repulped under similar conditions, it gave pulps with a good yield. Yields of the combined pulps were about 50% on basis of the starting chips for all of the species.
Pulping waste liquor was concentrated under reduced pressure and poured into 5 times volume of water to divide into acetic acid lignins and saccharides. When chips were pulped for 3 h and 4 h under the same conditions, saccharides were recovered in yields of 20% and 15% based on chips, respectively, as reducing sugars. The sugar composition of the saccharides suggested that most of xylose residue in them was composed mainly of monosaccharides. The aqueous solution containing the saccharides showed a dark-brown color. Decoloration of the aqueous solution was carried out effectively with active carbon and synthetic adsorbents. Decoloration by the adsorbents(XAD-2 and XAD-4)was achieved together with cation- and anionexchange resins. XAD-2 or XAD-4 is regenerated by washing with aqueous NaOH, polar-organic solvents such as methanol et al, so may be more effectively.
Japan Society for the Promotion of Science, Grant-in-Aid for General Scientific Research (C), Hokkaido University, 01560175

木質バイオマスのバイオリファイナリーと分離成分の有効利用,　　　　　　　　　　　　　　　
科学研究費補助金
1989
Competitive research funding

Biorefinery of woody biomass and effective utilization of refined components　　　　　　　　　　　　　　　
Grant-in-Aid for Scientific Research
1989
Competitive research funding