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Shimizu Naoto
| Research Faculty of Agriculture Fundamental AgriScience Research Bioresource and Environmental Engineering | Associate Professor |
Researcher basic information
■ Degree■ URL
researchmap URLホームページURL■ Various IDs
J-Global ID■ Research Keywords and Fields
Research KeywordResearch Field
- Environmental Science/Agriculture Science, Agricultural environmental engineering and agricultural information engineering, Renewable energy
- Nanotechnology/Materials, Nanobioscience
- Bachelor's degree program, School of Agriculture
- Master's degree program, Graduate School of Agriculture
- Doctoral (PhD) degree program, Graduate School of Agriculture
Research activity information
■ Awards- Sep. 2019, Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists, Academic Award
Naoto Shimizu
- Subcritical solvent extraction and microencapsulation of flavonoids from onion skin waste
Nagohira Sato; Naoto Shimizu
Applied Food Research, 5, 2, 101391, 101391, Elsevier BV, Dec. 2025, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Design and Optimization of a Smart IoT-Integrated Bioreactor for Enhanced Biogas Production Using Multi-Algorithm Modelling Approaches
Mohammed I S.; Aliyu M.; Simeon IM; Akande TY; Mohammed AS; Usman M.; Anumiri CE, Isah AG; Shimizu N.
NiJASIT, 1, 3, 359, 371, 25 Sep. 2025, [Peer-reviewed], [Last author]
English, Scientific journal - Efficacy of bottle gourd (Lagenaria siceraria) leaf extract in protecting against cabbage looper (Trichoplusia ni) (Lepidoptera: Noctuidae) infestation
Mst. Samia Sultana; Naoto Shimizu; Takanori Itoh; Kazunori Iwabuchi
Crop Health, 3, 1, Springer Science and Business Media LLC, 23 May 2025, [Peer-reviewed], [Corresponding author]
English, Scientific journal, Abstract
Cabbage (Brassica oleracea L.) crops are frequently attacked by cabbage looper larvae (Trichoplusia ni), which severely reduce cabbage production. This experiment was conducted in the late spring crop season from April 15, 2024, to August 20, 2024, at the Field Science Center for the Northern Biosphere, Hokkaido University, Japan. In this study, the efficacy of an ethanolic extract of bottle gourd (Lagenaria siceraria (Molina) Standl.) leaves was compared with those of the chemical insecticide permethrin 3.2 EC and aqueous dimethyl sulfoxide (DMSO; the control). The experiment was carried out using a randomized complete block design in which each treatment comprised three replications consisting of 24 plants in total. Compared with the control, the bottle gourd leaf extract had high biopesticide activity against cabbage looper, increasing the cabbage yield by 15.98%. The yield was almost equal to that achieved with Permethrin 3.2 EC. Compared with the control, the application of the extract significantly decreased looper larval infestation in field-grown cabbage by 41.18%, 39.71%, 52.08%, and 37.96% at the fifth, sixth, seventh, and eighth weeks, respectively. Five possible biopesticide compounds, namely, apigenin-7-O-glucoside, indole-3-butyric acid, strychnine, phytol and hexadecanoic acid, were identified in the ethanolic extracts of bottle gourd leaves by liquid chromatography–mass spectrometry analysis. Bottle gourd leaf extract has potential as an environmentally friendly and sustainable alternative to toxic chemical pesticides for controlling cabbage looper infestation. - Digital Analysis of Mycelium Growth and Mycelium Density In Vitro of Pleurotus ostreatus with Submerged Fermentation as Substrate Treatment
Jorge Andres Magaña Amaya; Naoto Shimizu
Mycobiology, 1, 11, Informa UK Limited, 13 Feb. 2025, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Effect of Hydrolysate Derived from Subcritical Seawater Treatment of Buckwheat Waste on the Growth of Lettuce (Lactuca sativa L.)
Yongheng Yuan; Faqinwei Li; Naoto Shimizu
Plants, 14, 2, 149, 149, MDPI AG, 07 Jan. 2025, [Peer-reviewed], [Corresponding author]
English, Scientific journal, This study explores the effects of a subcritical seawater treatment (SST) on buckwheat waste (BW), and the use of the hydrolysate as a liquid fertilizer to improve the growth of lettuce (Lactuca sativa L.). Three temperature treatments (110 °C, 170 °C, 230 °C) were used for the SST, and the ionic composition in the seawater achieved the depolymerization and degradation of BW. The X-ray diffraction of the residual solids showed that the structure of BW was destroyed. Compared with seawater, the hydrolysate contained higher amounts of elements beneficial to plant growth, such as N, P, K, and organic compounds such as phenolics and sugars, as a result of the degradation of BW caused by the SST. The hydrolysate was tested as a liquid fertilizer (treatments H110°C, H170°C, H230°C) to irrigate lettuce. The content of proteins, phenolics, and chlorophyll, as well as the weight of the lettuce in the H110°C and H170°C treatments, were significantly higher than those in the seawater and the H230°C irrigation treatments (p < 0.05). The hydrolysate from the SST of BW, being rich in various organic and inorganic nutrients, can act as a liquid fertilizer that promotes the growth of lettuce, whereas hydrolysate from higher SST temperatures might inhibit the growth of lettuce, because of the excessive total nitrogen and organic acid. - Efficacy of aqueous extracts from three plants in controlling cabbage aphid [Brevicoryne brassicae L. (Hemiptera: Aphididae)] on field-grown cabbage (Brassica oleraceae L.)
Mst. Samia Sultana; Md. Abul Kalam Azad; Naoto Shimizu; G. M Masud Rana; Mst. Sarmina Yeasmin
Technology in Horticulture, 4, 1, Maximum Academic Press, Oct. 2024, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Development of a fed-batch-scale anaerobic co-digestion control system based on multivariable output error state space and model predictive control
Ruijie Bai; Xiaojue Li; Naoto Shimizu
Results in Engineering, 102284, 102284, Elsevier BV, 17 May 2024, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Techno economic analysis of the production of potato powder applying potato starch purification system in Japan
Nagohira Sato; Naoto Shimizu; Mitsutoshi Nakajima
Discover Applied Sciences, 6, 5, Springer Science and Business Media LLC, 08 May 2024, [Peer-reviewed], [Corresponding author]
English, Scientific journal, Abstract
To implement the technology for producing potato powder, significant investment is required. This study evaluated the techno-economic feasibility of the dried potato powder production process, based on a scenario developed in a starch plant process in Japan. The simulation was performed with SuperPro Designer® software. The annual production volume and the unit production cost were estimated to be 15,786,585 kg and 1056 Japanese yen/kg, respectively. According to economic evaluation indicators—the gross margin, return on investment, payback time, internal rate of return, and net present value (at a 7% interest rate)—the scenario was profitable and investment worthwhile. A sensitivity analysis was conducted to evaluate the impact of the variable parameters (the purchasing price of raw potatoes, the selling price of potato powder, and labor and electricity costs) on the net present value (at the 7% interest rate). The analysis suggested that the purchasing price of raw potatoes and the selling price of potato powder had particularly large impacts on the net present value. - Enhancing bio-based chemical production and reducing pollutants emission through the synergistic effect of ZSM-5/CaO during hydrogen-deficient biomass pyrolysis
Mudassir Hussain Tahir; Naoto Shimizu
Thermal Science and Engineering Progress, 49, 102494, 102494, Elsevier BV, Mar. 2024, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Early-Stage Life Cycle Assessment and Optimization of Aqueous Crude Glycerol Extraction and Nanofiltration Concentration of Tomato Leaf Residue
Xiaojue Li; Yongheng Yuan; Faqinwei Li; Naoto Shimizu
ACS Sustainable Chemistry & Engineering, American Chemical Society (ACS), 24 Jan. 2024, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal - Impact of organic fertilization by the digestate from by-product on growth, yield and fruit quality of tomato (Solanum lycopersicon) and soil properties under greenhouse and field conditions
Faqinwei Li; Yongheng Yuan; Naoto Shimizu; Jorge Magaña; Pengxuan Gong; Risu Na
Chemical and Biological Technologies in Agriculture, 10, 1, Springer Science and Business Media LLC, 03 Aug. 2023, [Peer-reviewed], [Corresponding author]
English, Scientific journal, Abstract
Background
The application of organic fertilizer is a sustainable approach to maintain soil fertility in agricultural crop production. In contrast to other organic fertilizers, the digestate from by-products of anaerobic digestion has not been well characterized in terms of its agronomic properties. In this study, different fertilization treatments were investigated to evaluate their impacts on growth, yield and fruit quality of tomatoes and on soil properties under greenhouse and field conditions. The experiments comprised a control (unfertilized) and three treatments with the same nitrogen dose: chemical fertilizer, digestate from by-product (organic fertilizer) and digestate combined with chemical fertilizer.
Results
The results showed that the application of digestate significantly increased the growth and fruit quality of tomato including height, stem diameter, leaf chlorophyll content index, and photosynthetic rate of tomato plant and sugar–acid ratio, protein content, and ascorbic acid content of the fruit. The nitrate contents in tomato fruit were lower in the digestate treatment and digestate combined with chemical fertilizer treatment than in the chemical fertilizer. The digestate combined with chemical fertilization resulted in the greatest increase in tomato yield, up to 26.29% and 10.78% higher than that in the chemical fertilizer treatment under field and greenhouse conditions, respectively. Moreover, fertilization with digestate treatment and digestate combined with chemical fertilizer treatment increased soil fertility, including soil nitrogen and carbon contents, and enhanced soil enzyme activities under both field and greenhouse conditions. In addition, the growth, yield, and fruit quality of tomato were significantly correlated with soil chemical characteristics and soil enzyme activities.
Conclusions
The effects of digestate treatments to maintain a stable tomato yield and improve fruit quality may be due to the enhanced soil enzymatic activities and chemical properties. These results suggest that the use of digestate as a full or partial replacement for chemical fertilizer could improve the growth and fruit quality of tomato, maintain the yield, and reduce the use of inorganic fertilizers in tomato production.
Graphical Abstract - By-Product from Livestock Waste Recovery System Used as Fertilizer: Bioactive Compounds and Antioxidant Activity of Tomato Fruit as Affected by Fertilization under Field and Greenhouse Conditions
Faqinwei Li; Yongheng Yuan; Nanding Han; Xiaojue Li; Ruijie Bai; Jorge Magaña; Naoto Shimizu
Fermentation, 9, 8, 714, 714, MDPI AG, 27 Jul. 2023, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal, Conversion of livestock manure into organic fertilizer is a sustainable strategy in crop production. In contrast to composted manure, the agronomic characteristics of an anaerobic digestion by-product, digestate, have not been well characterized. This study aimed to investigate the effects of digestate and compost, derived from a pilot-scale livestock waste recycling system, on bioactive compounds in tomato fruits. Both field and greenhouse experiments were conducted to compare the effects of these two organic fertilizers with the application of chemical fertilizer. These comparisons were made by evaluating their influence on tomato yield and bioactive compound contents and antioxidant activity of fruits. The experiment included a control (no fertilizer) and three fertilization treatments with the same nitrogen dose: chemical fertilizer, digestate, and compost. The results revealed that the application of digestate and compost yielded similar results in terms of tomato production, surpassing both the chemical fertilizer application and the control group under both field and greenhouse conditions. Fertilization exhibited a significant influence on the bioactive compound contents and antioxidant capacity of the fruits. Furthermore, the application of digestate and compost led to an increase in the concentration of sugars, phenolic compounds, and several organic acids in the fruits while simultaneously reducing the citric acid levels in comparison to the chemical fertilizer treatment. Moreover, the application of both organic fertilizers improved the total phenol and total flavonoid contents in tomato fruits, and the antioxidant capacity in fruits was significantly higher than that of the chemical fertilizer treatment. In conclusion, the application of digestate or compost derived from the livestock waste recycling system reduced use of chemical fertilizers and resulted in higher tomato yields and fruit with considerably superior bioactive compounds. The results suggested that using digestate or compost as an alternative to inorganic fertilizers for tomato cultivation could assist farmers in increasing productivity, improving the content of bioactive compounds in tomato fruit, and promoting agricultural waste management. - Investigation of coupling synergistic interaction during Co-pyrolysis of cabbage waste and tire waste
Mudassir Hussain Tahir; Naoto Shimizu
Journal of Analytical and Applied Pyrolysis, 172, 105992, 105992, Elsevier BV, Jun. 2023, [Peer-reviewed]
English, Scientific journal - Buckwheat waste depolymerization using a subcritical ethanol solution for extraction of bioactive components: from the laboratory to pilot scale
Yongheng Yuan; Naoto Shimizu; Faqinwei Li; Jorge Magaña; Xiaojue Li
Journal of Environmental Chemical Engineering, 109807, 109807, Elsevier BV, Mar. 2023, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Synthesis evaluation on thermophilic anaerobic co-digestion of tomato plant residue with cattle manure and food waste
Xiaorui Xue; Xiaojue Li; Naoto Shimizu
Resources, Environment and Sustainability, 13, 100119, 100119, Elsevier BV, Mar. 2023, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Biochar-promoted methane production and mitigation of acidification during thermophilic anaerobic co-digestion of food waste with crude glycerol: comparison with re-inoculation
Xiaojue Li; Naoto Shimizu
Sustainable Environment Research, 33, 1, Springer Science and Business Media LLC, 07 Feb. 2023, [Peer-reviewed], [Corresponding author]
English, Scientific journal, Abstract
Food waste and crude glycerol were anaerobically co-digested for 100 days at 52 ± 1 °C with an organic loading rate of 1.0 g L−1 d−1. This long-term thermophilic anaerobic digestion (AD) system encountered severe inhibition from volatile fatty acids (VFAs). The study investigated the impacts of re-inoculation (RI) and biochar addition (BA) on this AD process, and monitored the variation of pH, VFAs, total alkalinity and total ammonia nitrogen during treatment. RI treatment was effective in the short term by recovering reactivity after inhibited sludge was mixed 1:1 with active inoculant. In the long term, RI could not reverse process imbalance and finally failed on day 56. Superior performance in methane production and process stability was observed in BA reactors when compared with control and RI reactors. Overall, the biochar contributed to alkalinity and facilitated the activation of methanogenesis and stimulated the conversion of VFAs. - Comparative effects of mineral fertilizer and digestate on growth, antioxidant system, and physiology of lettuce under salt stress
Li Faqinwei; Yongheng Yuan; Pengxuan Gong; Yoshiaki Imazumi; Risu Na; Naoto Shimizu
Horticulture, Environment and Biotechnology, Jan. 2023, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal - Exploring the Valorization of Buckwheat Waste: A Two-Stage Thermo-Chemical Process for the Production of Saccharides and Biochar
Yongheng Yuan; Li Faqinwei; Nanding Han; Bingyao Zeng; Yoshiaki Imaizumi; Risu Na; Naoto Shimizu
Fermentation, 8, 11, 573, Oct. 2022, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal - Modeling Anaerobic Co-Digestion of Corn Stover Hydrochar and Food Waste for Sustainable Biogas Production
Ibrahim Shaba; Risu Na; Naoto Shimizu
Fermentation, 8, 3, 110, 110, MDPI AG, 03 Mar. 2022, [Peer-reviewed], [Last author, Corresponding author]
Scientific journal, Despite the importance of the biodegradability of lignocellulose biomass, few studies have evaluated the lignocellulose biomass digestion kinetics and modeling of the process. Anaerobic digestion (AD) is a mature energy production technique in which lignocellulose biomass is converted into biogas. However, using different organic waste fractions in AD plants is challenging. In this study, lignocellulose biomass (corn stover hydrochar) obtained from hydrothermal carbonization at a temperature, residential time, and biomass/water ratio of 215 °C, 45 min, and 0.115, respectively, was added to the bioreactor as a substrate inoculated with food waste and cow dung to generate biogas. A state–space AD model containing one algebraic equation and two differential equations was constructed. All the parameters used in the model were dependent on the AD process conditions. An adaptive identifier system was developed to automatically estimate parameter values from input and output data. This made it possible to operate the system under different conditions. Daily cumulative biogas production was predicted using the model, and goodness-of-fit analysis indicated that the predicted biogas production values had accuracies of >90% during both model construction and validation. Future work will focus on the application of modeling predictive control into an AD system that would comprise both models and parameters estimation. - Pilot-scale extraction of polyphenols from spent black tea by semi-continuous subcritical solvent extraction
Surakshi Rajapaksha; Naoto Shimizu
Food Chemistry: X, 13, 100200, 100200, Elsevier BV, Mar. 2022, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Effects of Lipase Addition, Hydrothermal Processing, Their Combination, and Co-Digestion with Crude Glycerol on Food Waste Anaerobic Digestion
Xiaojue Li; Naoto Shimizu
Fermentation, 7, 4, 284, 284, MDPI AG, 27 Nov. 2021, [Peer-reviewed], [Corresponding author]
English, Scientific journal, To enhance anaerobic fermentation during food waste (FW) digestion, pretreatments can be applied or the FW can be co-digested with other waste. In this study, lipase addition (LA), hydrothermal pretreatment (HTP), and a combination of both methods (HL) were applied to hydrolyze organic matter in FW. Furthermore, the effects of crude glycerol (CG), which provided 5%, 10%, and 15% of the volatile solids (VS) as co-substrate (denoted as CG5, CG10, and CG15, respectively), on the anaerobic digestion of FW were assessed. With an increasing proportion of CG in the co-digestion experiment, CG10 showed higher methane production, while CG15 negatively affected the anaerobic digestion (AD) performance owing to propionic acid accumulation acidifying the reactors and inhibiting methanogen growth. As the pretreatments partially decomposed hard-to-degrade substances in advance, pretreated FW showed a stronger methane production ability compared with raw FW, especially using the HL method, which was significantly better than co-digestion. HL pretreatment was shown to be a promising option for enhancing the methane potential value (1.773 NL CH4/g VS) according to the modified Gompertz model. - Development of an Efficient Anaerobic Co-digestion Process for Biogas from Food Waste and Paper
Naoto SHIMIZU; Kazuto YOSHIDA
Environment Control in Biology, 59, 4, 165, 171, Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists, 01 Oct. 2021, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Development and Characterization of Functional Starch-Based Films Incorporating Free or Microencapsulated Spent Black Tea Extract
Surakshi Wimangika Rajapaksha; Naoto Shimizu
Molecules, 26, 13, 3898, 3898, MDPI AG, 25 Jun. 2021, [Last author, Corresponding author]
English, Scientific journal, Antioxidant polyphenols in black tea residue are an underused source of bioactive compounds. Microencapsulation can turn them into a valuable functional ingredient for different food applications. This study investigated the potential of using spent black tea extract (SBT) as an active ingredient in food packaging. Free or microencapsulated forms of SBT, using a pectin–sodium caseinate mixture as a wall material, were incorporated in a cassava starch matrix and films developed by casting. The effect of incorporating SBT at different polyphenol contents (0.17% and 0.34%) on the structural, physical, and antioxidant properties of the films, the migration of active compounds into different food simulants and their performance at preventing lipid oxidation were evaluated. The results showed that adding free SBT modified the film structure by forming hydrogen bonds with starch, creating a less elastic film with antioxidant activity (173 and 587 µg(GAE)/g film). Incorporating microencapsulated SBT improved the mechanical properties of active films and preserved their antioxidant activity (276 and 627 µg(GAE)/g film). Encapsulates significantly enhanced the release of antioxidant polyphenols into both aqueous and fatty food simulants. Both types of active film exhibited better barrier properties against UV light and water vapour than the control starch film and delayed lipid oxidation up to 35 d. This study revealed that starch film incorporating microencapsulated SBT can be used as a functional food packaging to protect fatty foods from oxidation. - Hydrogen Generation from Wood Chip and Biochar by Combined Continuous Pyrolysis and Hydrothermal Gasification
Bingyao Zeng; Naoto Shimizu
Energies, 14, 13, 3793, 3793, MDPI AG, 24 Jun. 2021, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal, Hydrothermal gasification (HTG) experiments were carried out to extract hydrogen from biomass. Although extensive research has been conducted on hydrogen production with HTG, limited research exists on the use of biochar as a raw material. In this study, woodland residues (wood chip) and biochar from wood-chip pyrolysis were used in HTG treatment to generate hydrogen. This research investigated the effect of temperature (300–425 °C) and biomass/water (0.5–10) ratio on gas composition. A higher temperature promoted hydrogen production because the water–gas shift reaction and steam-reforming reaction were promoted with an increase in temperature. The methane concentration was related positively to temperature because of the methanation and hydrogenation reactions. A lower biomass/water ratio promoted hydrogen production but suppressed carbon-monoxide production. Most reactions that produce hydrogen consume water, but water also affects the water–gas shift reaction balance, which decreases the carbon-monoxide concentration. By focusing on the practical application of HTG, we attempted biochar treatment by pyrolysis (temperature of heating part: 700 °C), and syngas was obtained from hydrothermal treatment above 425 °C. - Hydrothermal liquefaction of wood chips under supercritical and subcritical water reaction conditions
Naoto Shimizu; Bingyao Zeng; Keisuke Kushima
SN Applied Sciences, 3, 5, Springer Science and Business Media LLC, May 2021, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal,Abstract This work describes batch-type hydrothermal liquefaction (HTL) treatments of conifer wood chips at 180–425 °C, under either air or nitrogen atmosphere. Such experiments allow efficient extraction of 5-hydroxymethyl furfural (HMF) and other valuable chemical substances, such as glycolic acid and acetic acid, from the lignocellulosic biomass. These compounds and their decomposition products present in the samples after HTL are analyzed and quantified using spectroscopic and chromatographic techniques. In general, the relatively higher-pressure nitrogen atmospheric condition is more suitable for obtaining the desired products, relative to the air atmosphere. Based on the quantitative results, the optimal temperatures for producing acetic acid, glycolic acid, and HMF are 300 °C, 250 °C, and 180 °C, respectively. The interesting relationship between HMF yield and temperature is also discussed; as the temperature increases, the yield of HMF first decreases and then increases. This phenomenon is explained by the exothermic nature of the HMF decomposition reaction, which is inhibited by excessively high temperature (in the range from 380 to 425 °C). At moderately high temperatures (optimized conditions; 300 °C), the generation rate of HMF exceeds its decomposition rate, resulting in a high yield of HMF. Based on the results of the experiments conducted in this study, the decomposition mechanism describing HTL treatment of wood chips can be elucidated. This study therefore provides guidance for future work involving HMF extraction from lignocellulosic biomass. - Stabilization of Anaerobic Co-Digestion Process via Constant the Digestate Solids Content
Risu Na; Keisuke Uchitani; Kazuto Yoshida; Naoto Shimizu
Processes, 9, 2, 197, 197, MDPI AG, 21 Jan. 2021, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal, The process instability of anaerobic digestion (AD) is a common issue and may result in underperformance or short-term process failure. Extensive research has shown that total solids (TS) content in AD has a significant impact on system stability and performance. However, no study has examined the feasibility of stabilizing the AD process by maintaining constant TS content in the digestate. In this study, an innovative control approach based on constant TS content in the digestate during AD was developed using a mass balance equation. Two levels of TS content (desired values of 4% wet basis (w.b.) and 6% w.b.) were compared with conventional control. The process stability was examined by monitoring digestate components and pH. Substrate-specific methane yield (m3 CH4/kg VS) was used to assess the effectiveness of the controlled conditions. The results showed that the digestate TS content during AD can be controlled and that the digestion process can be stabilized by controlled conditions. In addition, constant TS in the digestate (within 1% w.b. of the desired level) gave increased levels of biogas production (10.2%), methane (13.5%), and substrate-specific methane yield (43.3%) at 4% TS, and respective increases of 16.6%, 21.2%, and 20.8% at 6% TS when compared with standard operation. - Effects of Pyrolysis on Biogas Production during Anaerobic Co-digestion of Corn Stover
Risu Na; Keisuke Kushima; Naoto Shimizu
MATEC Web of Conferences, 333, 07011, 07011, EDP Sciences, 2021, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal, The effects of pyrolysis pretreatment on biogas production during anaerobic co-digestion of corn stover were studied. The corn stover characteristics were investigated by performing thermogravimetric analysis using a heating rate of 10.0°C/min and an air atmosphere at atmospheric pressure. Corn stover aliquots pretreated in an electric furnace at 100°C for 360 min, 200°C for 15 min, and 300°C for 5 min were used. Untreated and pretreated corn stover samples were analyzed by scanning electron microscopy and other methods, and the bulk densities and component ratios were compared to identify changes caused by the pretreatments. The amounts of total solids, volatile solids, volatile fatty acids, and total ammonia nitrogen produced when the stover samples were anaerobically digested were measured. The biogas production rate and the methane concentration in the biogas were determined. The substrate-specific methane yields were determined, and the relationships between the yields and pretreatment conditions were assessed. The sample pretreated at 300°C for 5 min produced the most biogas. The corn stover total solid bulk density was directly related to the substrate-specific methane yield, the substratespecific methane yield decreasing as the total solid bulk density increased. - Biogas production management systems with model predictive control of anaerobic digestion processes
Kazuto Yoshida; Naoto Shimizu
Bioprocess and Biosystems Engineering, 43, 12, 2189, 2200, Springer Science and Business Media LLC, Dec. 2020, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal,Abstract We developed a biogas production management system to control biogas production by determining the feedstock inputs to the anaerobic digestion process according to fluctuations of the renewable energy supply. The developed system consists of three functions: a prediction model for the anaerobic digestion processes, a parameter-estimation system, and a feedstock-determination controller. A prediction model for the anaerobic digestion processes in a state-space representation was constructed for the input–output relationship of biogas generation from organic compounds and the state of methane fermentation. A parameter-estimation system that estimated the parameters included in the prediction model from actual operating process data was built based on adaptive identification theory. The feedstock-determination controller was established based on model predictive control as a method to control biogas production. From the results of the identification experiment, the least square estimator of the parameters converged as the training data increased, and a reliable parameter was given in 1 week. From the results of the numerical simulation and the control experiment, it was confirmed that the biogas production management system developed in this study had a high prediction accuracy and control performance. - Valorization of spent black tea by recovery of antioxidant polyphenolic compounds: Subcritical solvent extraction and microencapsulation
D.S.W. Rajapaksha; Naoto Shimizu
Food Science & Nutrition, 8, 8, 4297, 4307, Wiley, Aug. 2020, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Investigating the Effect of Processing Parameters on the Products of Hydrothermal Carbonization of Corn Stover
Ibrahim Shaba Mohammed; Risu Na; Keisuke Kushima; Naoto Shimizu
Sustainability, 12, 12, 5100, 5100, MDPI AG, 23 Jun. 2020, [Peer-reviewed], [Last author, Corresponding author]
English, Scientific journal, Corn stover is an abundant and underused source of lignocellulose waste biomass that can be transformed into a high-quality energy resource using hydrothermal carbonization (HTC). This investigation has focused on the effect of processing parameters on the products of HTC—namely solid fuel or hydrochar and liquid and gas fractions. HTC was conducted in a temperature-controlled small batch reactor with corn stover and deionized water under oxygen-free conditions obtained by pressurizing the reactor headspace with nitrogen gas. The properties of the hydrochar and liquid and gas fractions were evaluated as a function of the process temperature (250–350 °C), residence time (30–60 min) and biomass/water ratio (0.09–0.14). Central composite design modules in a response surface methodology were used to optimize processing parameters. The maximum mass yield, energy yield and high heating value (HHV) of the hydrochar produced were 29.91% dry weight (dw), 42.38% dw and 26.03 MJ/kg, respectively. Concentrations of acetic acid and hydrogen gas were 6.93 g/L and 0.25 v/v%, respectively. Experimental results after process optimization were in satisfactory agreement with the predicted HHV. The optimal HTC process parameters were determined to be 305 °C with a 60 min residence time and a biomass/water ratio of 0.114, yielding hydrochar with a HHV of 25.42 MJ/kg. The results confirm the feasibility of an alternative corn stover management system. - Effect of temperature on the hydrolysis of levan treated with compressed hot water fluids
Naoto SHIMIZU; Andres ABEA; Tetsuya USHIYAMA; Ebru Toksoy ÖNER
Food Science & Nutrition, Mar. 2020, [Peer-reviewed], [Lead author, Corresponding author], ［Internationally co-authored］
English, Scientific journal - Parboiled Paddy Drying with Different Dryers: Thermodynamic and Quality Properties, Mathematical Modeling Using ANNs Assessment
Ebrahim Taghinezhad; Antoni Szumny; Mohammad Kaveh; Vali Rasooli Sharabiani; Anil Kumar; Naoto Shimizu
Foods, 9, Jan. 2020, [Peer-reviewed], ［Internationally co-authored］
English, Scientific journal - The Hydrolysis Mechanism of Inulin and Its Hydrolysate in the Reaction Field by the Hot Compressed Water
Naoto Shimizu; Tetsuya USHIYAMA; Takanori Itoh
Environmental Control in Biology, 57, 4, 87, 92, Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists, Oct. 2019, [Peer-reviewed], [Lead author]
English, Scientific journal - Adaptive identification of anaerobic digestion process for biogas production management systems
Kazuto YOSHIDA; Keita KAMETANI; Naoto SHIMIZU
Bioprocess and Biosystems Engineering, 43, 45, 54, Sep. 2019, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Structure of Fine Waxy Rice Starch Prepared Via a Compressed Hot Water Process
Naoto Shimizu; Tetsuya Ushiyama
Food Science and Technology Research, 24, 5, 795, 801, Sep. 2018, [Peer-reviewed]
English, Scientific journal - Microencapsulation using Spray-drying: The Use of Fine Starch Solution for the Wall Material
Tetsuya Ushiyama; Naoto Shimizu
Food Science and Technology Research, 24, 4, 653, 659, Jul. 2018, [Peer-reviewed]
English, Scientific journal - Cattle manure composting in a packed-bed reactor with forced aeration strategy
Naoto Shimizu; Joko Nugroho Wahyu Karyadi; Michio Harano; Kazunori Iwabuchi; Toshinori Kimura
Engineering in Agriculture, Environment and Food, 11, 2, 65, 73, Elsevier B.V., 01 Apr. 2018, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal - The start-up of thermophilic anaerobic digestion of municipal solid waste
Subaru Nakajima; Naoto Shimizu; Hiroyuki Ishiwata; Tadahiko Ito
Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy, 95, 8, 645, 647, Japan Institute of Energy, 2016, [Peer-reviewed], [Corresponding author]
English, International conference proceedings - Drip Fertigation Using Dairy Cow Slurry Processed by Solid-Liquid Separation and Aerobic Digestion
山下 善道; 福原 資雄; 岩田 晃一郎; 佐藤 達雄; 荒木 肇; 近江谷 和彦; 清水 直人; 岩渕 和則
Journal of the Society of Agricultural Structures, Japan, 45, 1, 8, 13, Mar. 2014, [Peer-reviewed]
Japanese, Scientific journal - Characterization of the nanoscale processing of waxy rice starch using compressed hot water
Hirotsugu Yoshioka; Naoto Shimizu
Japan Journal of Food Engineering, 15, 2, 95, 100, Japan Society for Food Engineering, 2014, [Peer-reviewed], [Last author, Corresponding author]
Japanese, Scientific journal - Mass spectrometry of inulin hydrolyzate prepared using subcritical water
Takanori Itoh; Naoto Shimizu
Japan Journal of Food Engineering, 15, 3, 165, 172, Japan Society for Food Engineering, 2014, [Peer-reviewed], [Last author, Corresponding author]
Japanese, Scientific journal - Pulverization of Rice by Ultracentrifuge Cryomilling and Microstructure of Various Pulverized Rice
Toshiaki TAKAHASHI; Naoto SHIMIZU; Katerina Irene BUTRON FUJIU; Marcos Antonio das NEVES; Sosaku ICHIKAWA; Mitsutoshi NAKAJIMA
Japan Journal of Food Engineering, 14, 1, 59, 67, Japan Society for Food Engineering, 2013, [Corresponding author]
Japanese, Scientific journal, Six types of pulverized rice were prepared by ultracentrifuge cryomilling. In this method, the sample being pulverized is immersed in liquid nitrogen. The moisture content and protein content of pulverized rice obtained were determined, and their characteristics were compared with those of rice flours pulverized with three types of mill (disk mill, hammer mill, and jet mill) and a purified non-waxy rice starch. The particle size distributions of rice pulverized by ultracentrifuge cryomilling showed two peaks at 14.3–17.8 μm and 52.1–92.1 μm. The most finely pulverized rice showed a major peak at 17 μm. The pulverized rice particles (average particle size of 40 μm) were composed of spherical shapes. Rice flour pulverized to a micro-scale point (average particle size of 6.5 μm) was characterized by the enhancement of whiteness, which is one of the most important indices for bulk flours. - Ultra-fine Pulverization of Rice: Effects on Hydration Properties and Enzymatic Hydrolysis
Md. Sharif HOSSEN; Itaru SOTOME; Makiko TAKENAKA; Seiichiro ISOBE; Mitsutoshi NAKAJIMA; Naoto SHIMIZU; Hiroshi OKADOME
Japan Journal of Food Engineering, 14, 1, 37, 46, Japan Society for Food Engineering, 2013
English, Scientific journal - Micro- and nanotechnology for food processing
Naoto Shimizu; Hiroshi Okadome; Mitsutoshi Nakajima
Resource: Engineering and Technology for Sustainable World, 16, 6, 19, 20, Sep. 2009
English, Scientific journal - Measurement and fissuring of rice kernels during quasi-moisture sorption by image analysis
N. Shimizu; M. A. Haque; M. Andersson; T. Kimura
JOURNAL OF CEREAL SCIENCE, 48, 1, 98, 103, Jul. 2008, [Peer-reviewed], [Lead author, Corresponding author], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - Chemometric amylose modeling and sample selection for global calibration using artificial neural networks
Shimizu, N; Okadome, H; Wada, D; Kimura, T; Ohtsubo, K
Chinese Food Science, 29, 8, 118, 124, 2008, [Invited], [Lead author, Corresponding author]
English, Scientific journal - Investigation of Fissure Formation During the Drying and Post-Drying of Japonica Aromatic Rice
Jafar Hashemi; Naoto Shimizu
International Journal of Agriculture and Biology, 10, 2, 179, 184, 2008, [Peer-reviewed], [Last author]
English, Scientific journal - Influence of Drying and Post-drying Conditions on the Head Rice Yield of Aromatic Rice
Jafar Hashemi; Md. Ashraful Haque; Naoto Shimizu; Toshinori Kimura
Agricultural Engineering International: the CIGR Ejournal, Manuscript FP 07 034. X, 2008, [Peer-reviewed], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - Kinetics of bioethanol production from wheat milling by-products
Marcos Antonio Das Neves; Naoto Shimizu; Toshinori Kimura; Kiwamu Shiiba
JOURNAL OF FOOD PROCESS ENGINEERING, 30, 3, 338, 356, Jun. 2007, [Peer-reviewed], [International Magazine]
English, Scientific journal - Life cycle of rice: Challenges and choices for Bangladesh
Poritosh Roy; Naoto Shimizu; Hiroshi Okadome; Takeo Shiina; Toshinori Kimura
Journal of Food Engineering, 79, 4, 1250, 1255, Apr. 2007, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Effect of soaking and gaseous treatment on GABA content in germinated brown rice
Noriko Komatsuzaki; Kikuichi Tsukahara; Hidechika Toyoshima; Tadanao Suzuki; Naoto Shimizu; Toshinori Kimura
JOURNAL OF FOOD ENGINEERING, 78, 2, 556, 560, Jan. 2007, [Peer-reviewed], [International Magazine]
English, Scientific journal - Net isosteric heats of adsorption and desorption for different forms of hybrid rice
Md. Ashraful Haque; Naoto Shimizu; Toshinori Kimura; B. K. Bala
INTERNATIONAL JOURNAL OF FOOD PROPERTIES, 10, 1, 25, 37, 2007, [Peer-reviewed], [Corresponding author], ［Internationally co-authored］, [International Magazine]
English, Scientific journal - Degradation of Organic Matter in Cattle Manure Composting by Aeration and Turing in a Packed-Bed Reactor
Joko Nugroho; Wahyu Karyadi; Michio Harano; Naoto Shimizu; Tomohiro Takigawa; Toshinori Kimura
Journal of the Japanese Society of Agricultural Machinery, 69, 4, 71, 78, The Japanese Society of Agricultural Machinery and Food Engineers, 2007, [Peer-reviewed], [Corresponding author], ［Internationally co-authored］
English, A mixture of cattle manure and sawdust was composted using an 18.8 L reactor at aeration rates of 0.05, 0.15, and 0.50L/min.kgdm, employing three turning patterns (no turning, full turning, and turning with position change of the layers). The maximum temperatures for aeration were 64.3°C at 0.05L/min.kgdm, 73.2°C at 0.15L/min.kgdm, and 70.8°C at 0.50L/min.kgdm. An aeration rate of 0.50L/min.kgdm effectively accelerates composting in the early stage. A combination of aeration and the turning operation were found to resulting in different composting process patterns. Organic matter reduction in forced aeration composting can be enhanced with turning and its reduction in composting with full turning was somewhat greater than that for turning with a position change. We propose major composition changes in compost material by aeration and turning in a fabricated packed-bed reactor. - Effect of Intermittent Ventilation on Composting of Cattle Manure with a Small-Scale Reactor
Toshinori Kimura; Naoto Shimizu; Joko nugroho; wahyu Karyadi; Keisuke Sato
Journal of the Japanese Society of Agricultural Machinery, 69, 5, 78, 87, The Japanese Society of Agricultural Machinery and Food Engineers, 2007, [Peer-reviewed]
Japanese, Scientific journal, In order to reduce the operation cost of composting process with forced air ventilation, this study investigated the effect of intermittent ventilation on composting. Experiments with a small-scale reactor system were conducted for several combinations of ventilation rate, ratio of ventilation period and resting period, and cycling time of intermittent ventilation.
The experiment results demonstrated that a relatively higher ventilation rate and specific combination of ventilation/resting ratio could provide more effective composting than continuous ventilation. The tendency of the results seemed reasonable from our previous analyses on composting with continuous ventilation. - Energy consumption and cost analysis of local parboiling processes
Poritosh Roy; Naoto Shimizu; Takeo Shiina; Toshinori Kimura
Journal of Food Engineering, 76, 4, 646, 655, Oct. 2006, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Production of alcohol by simultaneous saccharification and fermentation of low-grade wheat flour
Marcos Antonio das Neves; Toshinori Kimura; Naoto Shimizu; Kiwamu Shiiba
Brazilian Archives of Biology and Technology, 49, 3, 481, 490, May 2006, [Peer-reviewed]
English, Scientific journal - Polyunsaturated fats attenuate the dietary phytol-induced increase in hepatic fatty acid oxidation in mice
T Hashimoto; N Shimizu; T Kimura; Y Takahashi; T Ide
JOURNAL OF NUTRITION, 136, 4, 882, 886, Apr. 2006, [Peer-reviewed], [International Magazine]
English, Scientific journal - Performance of an accelerated method for the determination of equilibrium moisture content
Ashraful Haque; M. K. K. Sudeepa; Naoto Shimizu; Toshinori Kimura
FOOD SCIENCE AND TECHNOLOGY RESEARCH, 12, 1, 1, 7, Feb. 2006, [Peer-reviewed]
English, Scientific journal - Kinetics of Ethanol Production by Zymomonas mobilis using Low-Grade Flour Wheat Flour in Batch Fermentation
Marcos A. das Neves; Naoto Shimizu; Toshinori Kimura; Kiwamu Shiiba
Journal of the Japanese Society of Agricultural Machinery, 68, 6, 109, 116, The Japanese Society of Agricultural Machinery and Food Engineers, 2006, [Peer-reviewed]
English, Scientific journal, An overview on the potential application of wheat milling by-products as substrate for fermentation in a small-scale bioreactor is presented. Model fermentations were conducted using glucose and dry baker's yeast. The overall ethanol yield was nearly stable (c.a. 0.35g/g), independent of mash glucose concentration. An overall ethanol productivity (Qv) of 3.48g/L⋅h was obtained using 100g-glucose/L as substrate. Slurries containing low-grade wheat flour (LG) (100, 200 or 300g/L) were used for simultaneous saccharification and fermentation (SSF) with Z. mobilis. The LG fermentation performance was evaluated based on the final ethanol concentration (P), Qv, ethanol yield (YP/S), ethanol production rate (Qp) and the glucose consumption rate (Qs). Mashes containing 200g-LG/L produced about 52g-ethanol/L, with an Qv of 2.17g/L⋅h. Based on the relatively high fermentation rate obtained from LG, reaching peak productivity after c.a. 9h of SSF, considerable savings on fermentation time was achieved, compared to industrial batch processes. In the year 2000 c.a. 0.34 million tons of LG were produced in Brazil; assuming that this by-product could be fully used as feedstock, the potential for producing bioethanol from LG would be 78.2 million L. - Effect of the Drying Process on the Physical Properties and Cooking Quality of Japonica Aromatic Rice
Jafar Hashemi; Naoto Shimizu; Toshinori Kimura
Japan Journal of Food Engineering, 7, 4, 233, 244, 2006, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Near-infrared transmission and reflectance spectroscopy for the determination of dietary fiber in barley cultivars
SE Kays; N Shimizu; FE Barton; K Ohtsubo
CROP SCIENCE, 45, 6, 2307, 2311, Nov. 2005, [Peer-reviewed], ［Internationally co-authored］, [Domestic magazines]
English, Scientific journal - Quality prediction of rice flour by multiple regression model with instrumental texture parameters of single cooked milled rice grains
H Okadome; H Toyoshima; N Shimizu; K Suzuki; K Ohtsubo
CEREAL CHEMISTRY, 82, 4, 414, 419, Jul. 2005, [Peer-reviewed], [International Magazine]
English, Scientific journal - The viscoelastic properties of soybean curd (tofu) as affected by soymilk concentration and type of coagulant
YQ Cheng; N Shimizu; T Kimura
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY, 40, 4, 385, 390, Apr. 2005, [Peer-reviewed], [Corresponding author], [Domestic magazines]
English, Scientific journal - Life Cycle Inventory Analysis of Rice Produced by Local Processes
Poritosh ROY; Naoto SHIMIZU; Toshinori KIMURA
Journal of the Japanese Society of Agricultural Machinery, 67, 1, 61, 67, The Japanese Society of Agricultural Machinery and Food Engineers, 2005, [Peer-reviewed], [Corresponding author]
English, Rice processing is one of the most important agro-industry. It consumes a considerable amount of energy and is responsible for environmental pollution. Life cycle inventory analysis has been performed on rice (parboiled and fresh) produced by different production processes (vessel, small-boiler, medium-boiler and untreated) to find an environmentally-friendly rice production process. The inventory results (energy consumption, atmospheric emission and solid waste) gradually decreased from the small-boiler to the untreated process (small-boiler>vessel>medium-boiler>untreated) and there is no waterborne emission in the case of the untreated process. The untreated process was found to be more environmentally-friendly compared to the others, however due to the lowest head rice yield (whole kernels after milling), it consumes greater resources (paddy). Among the parboiling processes the medium-boiler was found to be better, which has a lower energy inventory, atmospheric emission and solid waste compared to the others. This study also reveals that fuel switching only for cooking (biomass to electricity; electricity was assumed to be generated from biomass by IGCC technology) conserved primary energy (biomass) and reduced atmospheric emission (CO2, CO, CH4, TSP, NOx, and SOx) significantly. - Extraction of Wax from Banana Leaves as an Alternative Way of Utilizing Agricultural Residues
Takashi Yanagida; Naoto Shimizu; Toshinori Kimura
Japan Journal of Food Engineering, 6, 1, 29, 35, 2005, [Peer-reviewed]
English, Scientific journal - Performance of the Traditional Parboiling Process
Poritosh Roy; Naoto Shimizu; Toshinori Kimura
Journal of the South Pacific Agriculture, 9, 1&2, 28, 37, 2005, [Peer-reviewed], [Domestic magazines]
English, Scientific journal - Extraction of Wax and Functional Compounds from Fresh and Dry Banana Leaves
Takashi Yanagida; Naoto Shimizu; Toshinori Kimura
Japan Journal of Food Engineering, 6, 1, 79, 87, 2005, [Peer-reviewed]
Japanese, Scientific journal - Energy requirement in parboiling and its relationship to some important quality indicators
MR Islam; N Shimizu; T Kimura
JOURNAL OF FOOD ENGINEERING, 63, 4, 433, 439, Aug. 2004, [Peer-reviewed], [Corresponding author], [International Magazine]
English, Scientific journal - Effect of temperature distribution on the quality of parboiled rice Produced by traditional parboiling process
Poritosh Roy; Naoto Shimizu; Toshinori Kimura
Food Science and Technology Research, 10, 3, 254, 260, KARGER, Aug. 2004, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Energy conservation in cooking of milled raw and parboiled rice
P Roy; N Shimizu; T Kimura
FOOD SCIENCE AND TECHNOLOGY RESEARCH, 10, 2, 121, 126, May 2004, [Peer-reviewed]
English, Scientific journal - Present Status and Problems in Waste Disposal and Application of Technologies to the Agricultural Processing Residues
SHIMIZU Naoto
Journal of JSAM, 66, 3, 8, 15, The Japanese Society of Agricultural Machinery and Food Engineers, 01 May 2004
Japanese - Rheological Properties of MgCl2-coagulated Tofu and Conditions for Hard Tofu Production in China
Yongqiang Cheng; Naoto Shimizu; Toshinori Kimura
Journal of the Japanese Society of Agricultural Machinery, 66, 3, 98, 104, The Japanese Society of Agricultural Machinery and Food Engineers, 2004, [Peer-reviewed]
English, Scientific journal, This study investigates the rheological properties and microstructure of MgCl2-coagulated tofu (Mg-tofu) to obtain useful information for hard tofu production in China. The rheological properties of Mg-tofu are affected by soymilk concentrations and coagulant concentrations. A low MgCl2 concentration (15mM) resulted in soft tofu gel; increasing the MgCl2 content produced a hard tofu. Increasing the protein content of soymilk also commonly increases the rupture stress of tofu. However, an excessively high concentration of MgCl2 caused a ductile rupture of tofu at low protein concentration. MgCl2 exhibited a relatively narrow optimal range for coagulation of tofu. The stress relaxation curve of Mg-tofu, similar to that of CaSO4 and glucono-delta-lactone (GDL), can be fitted with a four-element Maxwell model that includes two Maxwell models. The parameters obtained from the four-element Maxwell model, in particular the viscous parameters and stress relaxation times, increased with an increase of the protein content in soymilk. It is possible to produce Mg-tofu that has a similar rupture stress to that of commercial tofu in China. The narrow optimal range and its rapid reaction with soy protein may cause difficulties in handling during industrial hard tofu production using MgCl2; this might be improved by mixing it with GDL or CaSO4. - Application of visible/near-infrared transmittance spectroscopy for the improvement of amylose determination accuracy
N Shimizu; H Okadome; T Yanagisawa; H Andren; K Thente; T Kimura; K Ohtsubo
FOOD SCIENCE AND TECHNOLOGY RESEARCH, 9, 2, 134, 136, May 2003, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal - Energy Consumption in Local Parboiling Process
Poritosh Roy; Naoto Shimizu; Toshinori Kimura
Journal of the Japanese Society of Agricultural Machinery, 65, 5, 133, 141, The Japanese Society of Agricultural Machinery and Food Engineers, 2003, [Peer-reviewed]
English, Scientific journal, Local parboiling processes (vessel, small boiler, medium boiler) were evaluated at Gazole under the Malda district in West Bengal, India. The energy consumption and the qualities of the parboiled rice produced in the vessel, small boiler and medium boiler process were measured. The initial installation cost of parboiling facilities was also worked out. Little difference in hardness value was observed among the processes. The color and lightness values were found to be the same in all processes. The parboiled rice produced under small and medium boiler methods had higher customer acceptance and market value compared to the vessel process but required higher initial installation cost. The small and medium boiler processes were found to be less tedious and provide better working environment compared to the vessel process. Among the studied processes, the medium boiler consumed the lowest amount of energy (1659MJ/t). The experimental results reveal that the local parboiling process can be improved in terms of energy consumption and market value of parboiled rice by adopting the medium boiler process. - Improvement of Traditional Parboiling Process
Poritosh Roy; Naoto Shimizu; Shingo Furuichi; Toshinori Kimura
Journal of the Japanese Society of Agricultural Machinery, 65, 1, 159, 166, 2003, [Peer-reviewed]
English, Scientific journal - Effect of Processing Conditions on Cooking Qualities of Parboiled Rice
Md. Rabiul Islam; Naoto Shimizu; Singo Furuichi; Toshinori Kimura
Journal of the Japanese Society of Agricultural Machinery, 65, 2, 85, 93, The Japanese Society of Agricultural Machinery and Food Engineers, 2003, [Peer-reviewed]
English, Scientific journal, A laboratory-scale experimental setup was fabricated to produce parboiled rice at lower temperatures (80, 90 and 100°C) to determine cooking qualities for different processing conditions and sample sizes (75, 120, 200 and 400g). The cooking qualities, such as water uptake value, solid content in the cooking gruel and cooking time of parboiled rice, were investigated. The cooking time of parboiled rice can be determined at the water uptake value of 2.5. The water uptake value and solid content decreased, and cooking time of parboiled rice increased according to the severity of the heat treatment in the parboiling process. A good linear relationship between the thermal property and cooking time clarified the cooking behavior of parboiled rice. A cooking time of 20 to 24min was obtained for the improved quality of parboiled rice produced at the processing conditions of 90°C-30min and 100°C-10min. It was assumed that for the respective cooking time, cooked under identical conditions, all parboiled rice might show the distinct level of solid contents. - Effect of processing conditions on thermal properties of parboiled rice
MR Islam; N Shimizu; T Kimura
FOOD SCIENCE AND TECHNOLOGY RESEARCH, 8, 2, 131, 136, May 2002, [Peer-reviewed]
English, Scientific journal - Effect of processing conditions on physical properties of parboiled rice
MR Islam; P Roy; N Shimizu; T Kimura
FOOD SCIENCE AND TECHNOLOGY RESEARCH, 8, 2, 106, 112, May 2002, [Peer-reviewed]
English, Scientific journal - Chemometric formulas based on physical properties of single-cooked milled rice grains for determination of amylose and protein contents
H Okadome; H Toyoshima; N Shimizu; T Akinaga; K Ohtsubo
JOURNAL OF FOOD SCIENCE, 67, 2, 702, 707, Mar. 2002, [Peer-reviewed], [International Magazine]
English, Scientific journal - Texture Evaluation of Tofu(Soybean Curd)by Viscoelastic Tests
Yongqiang Cheng; Naoto Shimizu; Toshinori Kimura
Journal of the Japanese Society of Agricultural Machinery, 64, 6, 137, 144, The Japanese Society of Agricultural Machinery and Food Engineers, 2002, [Peer-reviewed]
English, Scientific journal, Viscoelastic tests (stress-strain and stress relaxation tests) were applied to evaluate the texture of tofu. Tofu was made in the laboratory by using different concentrations of soymilk (5%, 6%, 7%, 8% and 9%, w/v) and coagulants, such as glucono-delta-lactone (GDL) and calcium sulfate. The parameters of stress-strain behaviors of GDL-coagulated tofu were higher than that of CaSO4-coagulated tofu at the same soymilk concentration. A 4-element model, composed of 2 Maxwell models, was conformed to fit the stress relaxation curves. The elastic parameters E1, E2 for the 4-element model did not significantly change while viscous parameters η1, η2 and relaxation time τ1, τ2 increased with increasing soymilk concentration. Viscoelastic behaviors of tofu suggested the stronger structures accompanying with the increase of soymilk concentration. It seemed that the stress-strain behavior was involved more with the viscous parameters than the elastic ones. These results showed that viscoelastic tests were effective for texture evaluation of tofu. Using this method, the commercial tofu in a local market of China was analyzed. The results showed that very hard tofu was being distributed in the market of China and it was possible to produce tofu by the production method of kinugoshi tofu (no press tofu) with a texture similar to the commercial tofu in China when using CaSO4 as a coagulant. - A Simplified Evaluation Method of Biodegradable Plastic (poly (lactic acid)) Products
石田頼子; 井原望; 斎藤由香; 清水直人; 木村俊範
農業機械学会誌, 64, 3, 121, 125, 2002, [Peer-reviewed]
Japanese, Scientific journal - Hydrolysis characteristics of biodegradable plastic (Poly Lactic Acid)
T Kimura; N Ihara; Y Ishida; Y Saito; N Shimizu
JOURNAL OF THE JAPANESE SOCIETY FOR FOOD SCIENCE AND TECHNOLOGY-NIPPON SHOKUHIN KAGAKU KOGAKU KAISHI, 49, 9, 598, 604, 2002, [Peer-reviewed], [Last author]
Japanese, Scientific journal - Measurement of total dietary fiber in milled barley using near-infrared transmittance spectroscopy
N Shimizu; K Sandra; F Barton; M Fujita; N Ishikawa; S Oda; T Kimura; K Ohtsubo
JOURNAL OF THE JAPANESE SOCIETY FOR FOOD SCIENCE AND TECHNOLOGY-NIPPON SHOKUHIN KAGAKU KOGAKU KAISHI, 49, 9, 620, 623, 2002, [Peer-reviewed], [Lead author, Corresponding author]
Japanese, Scientific journal - Quality Evaluation of Parboiled Rice with Physical Properties
Rabiul Islam; Naoto Shimizu; Toshinori Kimura
Food Science and Technology Research, 7, 1, 57, 63, S. Karger AG, 2001, [Peer-reviewed]
English, Scientific journal - Determination of Maximum Viscosity of Milled Rice Flours Using Near-Infrared Transmittance Spectroscopy
Naoto Shimizu; Takashi Yanagisawa; Hiroshi Okadome; Hidechika Toyoshima; Henrik Andren; Toshinori Kimura; Ken'ichi Ohtsubo
Food Science and Technology Research, 7, 2, 104, 109, S. Karger AG, 2001, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal - Viscoelastic Components of Hard-To-Cook Defect in Soybean Cotyledons Subjected to Accelerated Storage
O. N. K; Ojijo; Toshinori Kimura; Naoto Shimizu; Hiroshi Koaze
The Journal of the Society of Agricultural Stuctures, Japan, 30, 4, 383, 394, 農業施設学会, 2000, [Peer-reviewed]
English, Scientific journal - Charactersation of Textural Changes in Soy bean Cotyledons Subjected to Accelerated Storage and Salt Soaking
O. N. K; Ojijo; Toshinori Kimura; Naoto Shimizu; Hiroshi Koaze
The Journal of the Society of Agricultural Structures, 30, 4, 353, 364, 2000, [Peer-reviewed]
English, Scientific journal - Development of Rice Quality Evaluation Technique Based on Physical Properties of Cooked Rice (Part 2)
Naoto SHIMIZU; Toshinori KIMURA; O.N.K. Ojijo
Journal of the Japanese Society of Agricultural Machinery, 62, 2, 94, 100, The Japanese Society of Agricultural Machinery and Food Engineers, 2000, [Peer-reviewed], [Lead author]
Japanese, Scientific journal, In order to clarify effect of rice physical properties on the cooked rice adhesion. The present paper deals with the changes in rice indices related to rice stickiness during cooking on the Excess Water Cooking Method. The correlation of rice indices is discussed. The rates of degree of rice gelatinization were found to be corresponding with the rates of TS increment. The cooked rice adhesion was considered to be affected by both degree of rice gelatinization and TS. These results led the conclusion that degree of rice gelatinization and TS can be used for the indicator of cooked rice adhesion during rice cooking process. - Analysis of Practical Calibration Models Characteristics for Rice Quality Evaluation Using Near-infrared Spectroscopy
Naoto Shimizu; Toshinori Kimura; Takashi Yanagisawa; Henrik Andren; Hiroshi Okadome; Hidechika Toyoshima; Ken'ichi Ohtsubo
2000 ASAE Annual Intenational Meeting, Technical Papers: Engineering Solutions for a New Century, 2, 1303, 1311, 2000
English, International conference proceedings - Determination of Apparent Amylose Content in Japanese Milled Rice Using Near-Infrared Transmittance Spectroscopy
Naoto Shimizu; Jyunji Katsura; Takashi Yanagisawa; Shigeru Inoue; Robin P. Withey; Ian A. Cowe; Colin G. Eddison; Anthony B. Blakeney; Toshinori Kimura; Shigeru Yoshizaki; Hiroshi Okadome; Hidechika Toyoshima; Ken'ichi Ohtsubo
Food Science and Technology Research, 5, 4, 337, 342, S. Karger AG, 1999, [Peer-reviewed], [Corresponding author]
English, Scientific journal - Experimental Studies on Rice Stickiness in Varietal Difference Evaluation
Naoto SHIMIZU, Toshinori KIMURA, Ken'ichi OHTSUBO, Takaaki MAEKAWA, Shigeru YOSHIZAKI
農業施設, 28, 1, 31, 38, 1997, [Peer-reviewed], [Lead author]
Japanese, Scientific journal - Development of Rice Quality Evaluating Technique Based on Physical Properties of Cooked Rice (Part 1)
Naoto SHIMIZU; Toshinori KIMURA; Ken'ichi OHTSUBO; Hidechika TOYOSHIMA
The Japanese Society of Agricultural Machinery, 59, 6, 75, 82, 1997, [Peer-reviewed], [Lead author]
Japanese - Experimental Studies on Rice Stickiness in Varietal Difference (Part 1)
Toshinori KIMURA; Naoto SHIMIZU; Shigeru YOSHIZAKI; Shin'ichi TANEYA
The Society of Agricultural Structures, 27, 1, 3, 10, 1996, [Peer-reviewed]
Japanese, Scientific journal - Trials of Quality Evaluation for Parboiled and Other Rice by Means of the Near Infrared Spectroscopy and the Rapid Visco Analyzer
Toshinori Kimura; Naoto Shimizu; Tooru Shimobara; Jiro Warashina
The Journal of the Society of Agricultural Structures, Japan, 25, 4, 175, 182, 1995, [Peer-reviewed]
English, Scientific journal
- 微細化米微粉末水溶液のDifferential Scanning Calorimetry(DSC)による熱的特性の解析
清水直人; 岡留博司, 日本食品工学会年次大会講演要旨集, 15th, 72, 15 Jul. 2014
Japanese - マイクロスケール米粉の作製と加工適性の検討
岡留博司; HOSSEN Sharif Md; 五月女格; 竹中真紀子; 五十部誠一郎; 中嶋光敏; 清水直人, 農業食料工学会年次大会講演要旨, 72nd, 77, 01 Sep. 2013
Japanese - マイクロスケール米粉の加工用途の検討
岡留博司; HOSSEN Sharif Md; 五月女格; 竹中真紀子; 五十部誠一郎; 中嶋光敏; 清水直人, 日本食品工学会年次大会講演要旨集, 14th, 32, 16 Jul. 2013
Japanese - 各種粉砕・分級操作による米の微粉末化と素材の品質・安定性
清水 直人; 岡留 博司; 中嶋 光敏, 化学工学会 研究発表講演要旨集, 2010, 0, 589, 589, 2010
公益社団法人 化学工学会, Japanese - New Food Materials by Fermentation of Indica Type Rice, Pulse and Tofu-byproduct : Production of dosa・okara dosa
SHIMIZU Naoto; KIMURA Toshinori, Journal of the Brewing Society of Japan, 100, 4, 224, 229, 15 Apr. 2005
日本醸造協会, Japanese - 米飯物性値による米品質予測モデルの検討
岡留博司; 清水直人; 鈴木啓太郎; 大坪研一, 日本食品科学工学会大会講演集, 50th, 2003 - 透過型近赤外分光法による米の非破壊的品質評価 (第3報):可視・近赤外分光によるアミロース測定モデルの精度改善
清水 直人; 木村 俊範; ヘンリック アンドレン; カリン テント; 岡留 博司; 大坪 研一, 農業機械学会誌, 65, 0, 443, 444, 2003
The Japanese Society of Agricultural Machinery and Food Engineers, Japanese - 透過型近赤外分光法による米の非破壊的品質評価 (第2報):最高粘度の測定
清水 直人; 木村 俊範; フォス ティケータ; 岡留 博司; 大坪 研一, 農業機械学会誌, 64, 0, 507, 508, 2002
The Japanese Society of Agricultural Machinery and Food Engineers, Japanese - 中国における豆腐品質改善のための基礎解析 : 豆腐のテクスチャー評価
程 永強; 清水 直人; 木村 俊範, 農業機械学会年次大会講演要旨, 60, 139, 140, 01 Apr. 2001
Japanese - 軽発酵パンケーキ(ドーサ)の発酵とテクスチャとの関係
長嶺 清司; 石橋 慶子; 木村 俊範; 清水 直人, 農業機械学会年次大会講演要旨, 60, 283, 284, 01 Apr. 2001
Japanese
- Utilization and profiles of spent black tea, In book: Tea in Health and Disease Prevention
Surakshi Rajapaksha; Naoto Shimizu
Academic Press, Jan. 2025, 9780443141584, Spent black tea is the residue after tea brewing and usually discarded as a waste. Mild conditions in black tea brewing produce a high content of phenolic compounds in the residue. Complexity and high molecular weight of these remained polyphenols require a modern extraction technique. These polyphenols, such as theaflavins and thearubigins, exhibit strong antioxidant properties, which can be beneficial for human health. Due their ability to scavenge free radicals, the underutilized phenolic compounds in spent black tea can be used as a functional food ingredient in foods or packaging materials. Effectiveness of polyphenols may lower when direct inclusion due their stability to undesirable environmental conditions, low water solubility, and low bioavailability; thus, microencapsulation of polyphenols would be protected until further applications. This review complies the polyphenols profile in spent black tea and their health benefits, different extraction methods, microencapsulation, and uses of spent black tea., [Joint work] - CHARACTERIZATION OF FRUCTANS BY SIZE-EXCLUSION CHROMATOGRAPHY: A REVIEW, In book: Agricultural Research Updates.
Naoto SHIMIZU; Andrés ABEA
Nova Science Publishers, Inc., Feb. 2020, [Joint work] - Structure of Fine Starch Prepared Via a Compressed Hot Water Process, In book: Frontiers in Natural Product Chemistry
Naoto Shimizu; Tetsuya Ushiyama
Bentham Science Publishers: Vol. 6, 2020, In a “top-down” process, starch nanoparticles can be produced by structural and size refinements through the breakdown of large particles. In this study, the structure of fine starches prepared via a compressed hot water process at different temperatures (160 – 180°C) was analysed using dynamic light scattering and sizeexclusion chromatography with multi-angle light scattering (MALS) and differential refractive index detection. Changes in the molecular weight, polydispersity, hydrodynamic radius, and radius of gyration were assessed. The intrinsic viscosity of the fine starch solution was derived from the Flory-Fox and Ptitsyn-Eizner equation. The weight-average molecular weight decreased to 7.29×10-5 g/mol while the average hydrodynamic radius and weight-average radius of gyration decreased by 34.9 nm and 14.6 nm respectively, in fine starch prepared at 180 °C. In fine starches prepared at 160 °C, 165 °C, and 170 °C, tails in the multi-angle light scattering peaks, upswings in the conformation plots, and upturns in the plots of gyration radii and elution volumes were all the result of branching structures. In fine starches prepared at 175 °C and 180 °C, amylopectin branching was diminished and symmetrical scattering peaks were detected in the MALS analysis. We propose a pathway for waxy rice starch hydrolysis by a compressed hot water process., [Joint work] - Process Optimization of Composting Systems, In book: Robotics and Mechatronics for Agriculture
CRC Press, Nov. 2017, [Single work] - 米澱粉のナノスケール加工技術の開発と機能性マイクロカプセル化の検討
化学工学会 バイオ部会 Newsletter No. 44, Feb. 2017, [Single work] - 農業・食料由来残さからのエネルギー回収
87-93
食品と容器, Feb. 2017, [Single work] - 微粉砕穀物の特性と利用
シーエムシー出版, Oct. 2013 - Micro- and Nanotechnology for food processing
Resource, 2009 - 微粉砕穀類の品質と利用特性
シーエムシー出版, 2009 - Micro- and Nanotechnology for food processing
Resource, 2009 - 食品リサイクル
２００８年版 農産物流通技術年報, 2008 - Food recycle
2008 Nousanbutsuryutsugijyutunenpo, 2008 - 食品加工副産物等からの有用成分抽出技術
食品と技術, 2007 - 米，豆類，オカラの発酵による新食品素材の開発
日本醸造協会誌, 2005 - New Food Materials by Fermentation of Indica Type Rice, Pulse and Tofu-byproduct -Production of dosa, okara dosa
NIPPON JOZOKYOKAI SHI, 2005 - 農産加工残さの処理・利用技術の現状と課題
農業機械学会誌, 2004 - Rice Mill Byproduct Utilization Technology
KOKKEN, PRPC, In "RICE POSTPRODUCTION TECHNOLOGY"A Technical Reference Guide, 2003 - 食品産業における環境問題
木村俊範編著：食品のゼロエミッション，幸書房, 2003 - 米の形態・組織，米の食味評価法，米の炊飯特性試験（分担執筆）
熱帯農業事典編集委員会編：熱帯農業事典，養堅堂, 2003 - Rice Mill Byproduct Utilization Technology
KOKKEN, PRPC, In "RICE POSTPRODUCTION TECHNOLOGY" A Technical Reference Guide, 2003 - 食料生産系物質循環システムと未利用資源利用技術(共著)
食品産業環境保全研究組合編 恒星社厚生閣, 1999
- スマート生産システムの構築：複合型センサーによる青果物 （玉ねぎ，馬鈴薯）の品質評価と応用
「北海道大学とＪＡ北海道グループとの連携協力に関するセミナー」, 27 Apr. 2017, Japanese, Public discourse
[Domestic Conference] - 乾式メタン発酵に関する研究概要
エコロジア北海道２１推進協議会勉強会, Mar. 2017, Japanese, Public discourse
[Domestic Conference] - バイオマス製品中のバイオマス含有率測定技術
木村 俊範; 清水 直人; 上野 孝; 加藤 俊明; 酒井 正裕
農業機械学会誌, 2008, The Japanese Society of Agricultural Machinery and Food Engineers, Japanese
2008 - 2008 - 豆臭さ低減を目的とした豆腐加工法の基礎的研究
清水 直人; 辻 典子; 木村 俊範
農業機械学会誌, 2008, The Japanese Society of Agricultural Machinery and Food Engineers, Japanese
2008 - 2008 - 実規模畜糞堆肥化設備における間欠通気の影響
原野 道生; 木村 俊範; 清水 直人; 道宗 直昭; 原田 泰弘; 村岡 和浩
農業機械学会誌, 2004, The Japanese Society of Agricultural Machinery and Food Engineers, Japanese
2004 - 2004 - Study on the texture of okara-added tofu
CHENG Yongqiang; SHIMIZU Naoto; KIMURA Toshinori
Journal of JSAM, 2002, The Japanese Society of Agricultural Machinery and Food Engineers, English
2002 - 2002 - 農業用生分解性プラスチック (ポリ乳酸) 製品の分解性
高橋 洋一; 石田 頼子; 清水 直人; 木村 俊範
農業機械学会誌, 2002, The Japanese Society of Agricultural Machinery and Food Engineers, Japanese
2002 - 2002 - オカラなど未利用資源を活用した発酵による新食品開発 (第2報):オカラ添加によるパンケーキの物理的性質の変化
清水 直人; 長嶺 清司; 星真 里子; 木村 俊範
農業機械学会誌, 2002, The Japanese Society of Agricultural Machinery and Food Engineers, Japanese
2002 - 2002 - 分子生物学的手法を用いた発酵食品安全性評価法に関する研究
小山 英亮; 井上 高一; 清水 直人; 木村 俊範
農業機械学会誌, 2002, The Japanese Society of Agricultural Machinery and Food Engineers, Japanese
2002 - 2002 - 米飯物性による米の品質評価技術の開発 (第3報):炊飯過程における米の理化学特性が米飯の粘着力に及ぼす影響
清水 直人; 木村 俊範
農業機械学会誌, 1999, The Japanese Society of Agricultural Machinery and Food Engineers, Japanese
1999 - 1999
- 有機資源循環学特論, 2024年, 修士課程, 農学院
- 食品・循環農業システム工学特論, 2024年, 修士課程, 農学院
- 応用力学, 2024年, 学士課程, 農学部
- 熱力学, 2024年, 学士課程, 農学部
- 農作業学, 2024年, 学士課程, 農学部
- The Society of Agricultural Structures, Japan
- The Japanese Society of Applied Glycoscience
- The Japanese Society of Agricultural Machinery and Food Engineers
- Chemical Engineering of Japan
- Japan Society for Food Engineering
- The Japanese Society for Food Science and Technology
- The American Society of Agricultural and Biological Engineers
- Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists
- Development of Microencapsulation System for Functional Nanoparticles via Carbohydrate Polymer
Grants-in-Aid for Scientific Research
01 Apr. 2021 - 31 Mar. 2024
清水 直人
本研究では，糖質高分子を用いる機能性ナノ粒子のマイクロカプセル化システムの確立をめざして，申請者が開発を進めてきた加圧熱水反応場を活用するナノメートルスケールの微粒子調製技術を用いて試料を作成する。この研究によりナノメートルスケールの微粒子における糖質高分子鎖や階層構造が多様な動的・静的性質の変化に及ぼす影響を解き明かすために２つの課題を進めた。
糖質高分子の分岐―線状トポロジ（一次構造）と物性解析法の構築について，ナノメートルまで微細化された粒子は，マイクロメートルの微細化粒子と異なる挙動を示すことが予備実験にて確認されており，分子量と固有粘度の関係を調べた。糯米由来澱粉と超純水を供試し，希薄溶液（濃度0.1 % （w/w））を調製する。澱粉ナノ粒子分散系の調製方法に従って，熱水場による所定の微細化プロセスにより5 水準の澱粉ナノ粒子分散系を調製した。調製試料について，サイズ排除クロマトグラフィ（SEC-LS）を用いて回転半径（Rg），分子量，分子形状について分析を行い，固有粘度との関係を求めた。さらに，STEMによる電子線トモグラフィを用いるナノ微粒子のメゾスケール構造観察に着手し，澱粉ナノ粒子の調製条件，及び試料前処理について検討を行い，電子線トモグラフィ画像を積層させてソフトウエアにより立体画像を構成した。
玉ねぎ外皮からのケルセチン等ナノろ過による抽出・濃縮の検討について，熱水場を用いて玉ねぎ外皮から成分を抽出し，その溶液から定量ろ紙を用いて玉ねぎ外皮浮遊物を取り除いた。さらに，遠心分離機を行い，上澄み液を得て，これを0.45 μmのニトロセルロースフィルタに通してナノろ過装置への供給溶液を調製した。機能性成分のナノろ過を検討した結果，透過液においては，ケルセチン以外の物質を除去させることができ，ケルセチン純度を高められることが明らかになった。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 21K05451 - 加圧熱水による多糖類のナノ分散系の調製
May 2011 - Mar. 2014
Competitive research funding - Development of the Nano Scale Processing Technology for Starch/polysaccharides Nano Dispersion by the Reaction Field of Compressed Hot Water
Grants-in-Aid for Scientific Research
2011 - 2013
SHIMIZU NAOTO; KIMURA Toshinori
We proposed that the nano meter scale processing for starch/polysaccharides dispersion by the reaction field of compressed hot water with pressure vessel and heating equipment was effective for producing nano starch dispersion and we have new attempted to determine the reaction field of subcritical water by the ionic product. The inulin hydrolyzate component also was determined by mass spectrometry. The proposed nanoscale processing method and its measurement of reaction field of compressed hot water by ionic product is feasible to control of the reaction field of subcritical water in reactor for produced starch/polysaccharides nano dispersion.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 23580157 - 穀類のマイクロ/ナノスケール加工
2007 - 2011
Competitive research funding - Development of Biomass Content Measurement in Biomass Products by Accelerator Mass Spectrosc Sopy
Grants-in-Aid for Scientific Research
2007 - 2008
KIMURA TOSHINORI; UENO Takashi; SHIMIZU Naoto
貝殻などの生物由来無機物質をも含むバイオマス・ニッポン総合戦略のバイオマス定義に基づく各種バイオマス資源、製品中のバイオマス含有量(バイオマス度)を高精度に計測するため、前処理、及び計測プロトコールを開発した。これに基づき、バイオマスマーク取得製品やバイオ燃料など、さらに誤差要因として影響の大きいと思われた木材、海生バイオマスを測定した。
それらの結果、上記、木材、海生バイオマスを除き、極めて高精度にバイオマス度を計算でき、高精度測定法として類似測定法の基準とできるものと判断された。一方、着色の強いバイオ燃料、及び木材、海生バイオマス由来のものについては、栽培年代、採取地域、深度などの影響を受けることが再確認された。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 19380180
