Kawaguchi Toshikazu(Faculty of Environmental Earth Science　Materials Science　Molecular Materials Chemistry)

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Kawaguchi Toshikazu

Faculty of Environmental Earth Science　Materials Science　Molecular Materials Chemistry Associate Professor

Researcher basic information

■ Degree

博士 (地球環境科学), 北海道大学

■ URL
researchmap URL

https://researchmap.jp/kawaguchi3?lang=en

ホームページURL

https://jglobal.jst.go.jp/detail?JGLOBAL_ID=201301027071390531

http://kaken.nii.ac.jp/d/r/90448407.ja.html

■ Various IDs
J-Global ID

201301027071390531

■ Research Keywords and Fields
Research Keyword

System Engineering

Chemical Sensor

ナノテクノロジー

自己組織化膜

エネルギー

スーパーキャパシタ

界面制御技術

Research Field

Environmental Science/Agriculture Science, Environmental materials and recycle technology

Environmental Science/Agriculture Science, Environmental load reduction and remediation

■ Educational Organization

Bachelor's degree program, School of Science

Master's degree program, Graduate School of Global Food Resources

Doctoral (PhD) degree program, Graduate School of Global Food Resources

Career

■ Career
Career

Oct. 2009 - Present
北海道大学地球環境科学研究科(研究院), 准教授

Research activity information

■ Papers

Development of Absorbent Using Amylose-Graphite Composite Electrode for Removal of Heavy Metals
Shuang Li; Guizani Mokhtar; Ryusei Ito; Toshikazu Kawaguchi
Membranes, 11, 12, 930, 930, MDPI AG, 26 Nov. 2021
Scientific journal, Amylose of Phragmites Australis captures heavy metals in a box consisting of sugar chains. However, its absorption rate is low in the period of the month scale. Therefore, the electrochemical driving force was used to promote the absorption rate in this research. Amylose was doped with TiO2 porous graphite electrode. The composted absorbent was characterized using XRD(X-ray diffraction), SEM (Scanning Electrode Microscopy), Raman spectroscopy, and electrochemical methods. The affinity and maximum absorption amount were calculated using the isotherm method. In this study, Pb2+, Cu2+, Cd2+, and Cr6+ were chosen to demonstrate because these heavy metals are significant pollutants in Japan’s surface water. It was found that the maximum absorption was Cu2+ (56.82-mg/L) > Pb2+ (55.89-mg/L) > Cr6+ (53.97-mg/L) > Cd2+ (52.83.68-mg/L) at −0.5 V vs. Ag/AgCl. This is approximately the same order as the hydration radius of heavy metals. In other words, the absorption amounts were determined by the size of heavy metal ions. Subsequently, the mixed heavy metal standard solution was tested; the maximum absorption amount was 21.46 ± 10.03 mg/L. It was inferred that the electrochemical driving force could be shown as the ion size effect in the mixed solution. Despite there being no support for this hypothesis at this time, this study succeeded in showing that the electrochemical driving force can improve the ability of the absorbent.

The use of a two-step removal protocol and optimized culture conditions improve development and quality of zona free mouse embryos.
Weihong Fan; Misato Homma; Renliang Xu; Hiroki Kunii; Hanako Bai; Manabu Kawahara; Toshikazu Kawaguchi; Masashi Takahashi
Biochemical and biophysical research communications, 577, 116, 123, 05 Nov. 2021, [International Magazine]
English, Scientific journal, The zona pellucida (ZP) plays an important role in both the fertilization and embryonic development. For the successful handling of early stage blastomeres for differentiation analysis, the production of identical twins or quadruplets, nuclear transfer or gene introduction requires the removal of the ZP (ZPR). Although single use of either acidic Tyrode's solution or pronase are commonly used for ZPR, long-term exposure to these agents can result in the inhibition of development with the collapse of the three-dimensional blastomere structure. Here, we demonstrate the benefits of using a two-step combined ZPR method, which relies upon a customized well-of-well (cWOW) system with smaller well size, on developmental competence and the quality of the zona free (ZF) mouse embryos. We first isolated 2-cell embryos using acid Tyrode's solution and then cultured these embryos using either commercially available or cWOW, which had a smaller microwell size. The rate of blastocyst was significantly increased by use of cWOW when compared to other culture systems. Then we evaluated the use of a two-step ZPR protocol, relying on acid Tyrode's solution and proteinase K, and subsequent culture in the cWOW system. Although acid Tyrode's solution treatment alone reduced ZPR time, blastomere morphology became wrinkled, significant decrease in blastocyst rate associated with increased number of apoptotic cells and increased expression of apoptosis-related genes were observed. Using proteinase K alone increased ZPR time and significantly decreased the blastocyst rate, but did not induce an increase in apoptotic cell number or apoptosis-related gene expression. In contrast, two-step method significantly reduced ZPR time and improved blastocyst rate by increasing the total number of cells in these wells an reducing the number of apoptotic cells in these experiments. These results suggest that the two-step ZPR protocol is beneficial for reducing the toxic effects of zona removal on ZF embryo development and quality when combined with a suitable culture system.

Morphological, Chemical and Electrochemical Carbon Based and Nobel Metal Electrode Characterization for Use in Water Electrochemical Disinfection
Guizani Mokhtar; Yajima Kento; Kawaguchi Toshikazu; Ito Ryusei; Funamizu Naoyuki
RECENT ADVANCES IN ENVIRONMENTAL SCIENCE FROM THE EURO-MEDITERRANEAN AND SURROUNDING REGIONS, VOLS I AND II, 933, 935, 2018, [Peer-reviewed]

Surface plasmon resonance investigation of two-dimensional organic-inorganic hybrid materials with mouse IgG
Li Long; Wanjun Liu; Hengheng Xia; Yao Ken; Kawaguchi Toshikazu; Shimazu Katsuaki
SENSORS AND ACTUATORS B-CHEMICAL, 213, 248, 251, Jul. 2015, [Peer-reviewed]
English, Scientific journal

Zirconia-based planar NO2 sensor using ultrathin NiO or laminated NiO-Au sensing electrode
Vladimir V. Plashnitsa; Taro Ueda; Perumal Elumalai; Toshikazu Kawaguchi; Norio Miura
Ionics, 14, 1, 15, 25, Feb. 2008, [Peer-reviewed]
English, Scientific journal

Fabrication of a novel immunosensor using functionalized self-assembled monolayer for trace level detection of TNT by surface plasmon resonance
Toshikazu Kawaguchi; Dhesingh Ravi Shankaran; S. J. Kim; K. Vengatajalabathy Gobi; Kiyoshi Matsumoto; Kiyoshi Toko; Norio Miura
TALANTA, 72, 2, 554, 560, Apr. 2007, [Peer-reviewed]
English, Scientific journal

High electrocatalytic performance of Pd/Sn/Au electrodes for nitrate reduction
Keijiro Tada; Toshikazu Kawaguchi; Katsuaki Shimazu
Journal of Electroanalytical Chemistry, 572, 1, 93, 99, Elsevier, 15 Oct. 2004, [Peer-reviewed]
English, Scientific journal

Redox and mass transport characteristics of domain-free mixed ferrocenyloctanethiol/alkanethiol monolayers on gold
Toshikazu Kawaguchi; Keijiro Tada; Katsuaki Shimazu
Journal of Electroanalytical Chemistry, 543, 1, 41, 49, Elsevier, 13 Feb. 2003, [Peer-reviewed]
English, Scientific journal

Construction of mixed mercaptopropionic acid/alkanethiol monolayers on polycrystalline gold electrodes using underpotentially deposited lead as the control element
Katsuaki Shimazu; Youichi Hashimoto; Toshikazu Kawaguchi; Keijiro Tada
Journal of Electroanalytical Chemistry, 534, 2, 163, 169, 18 Oct. 2002, [Peer-reviewed]
English, Scientific journal

Preparation of binary metal electrocatalysts by self-assembly of precursor ionic species on gold and reduction of nitrate ions
Katsuaki Shimazu; Toshikazu Kawaguchi; Keijiro Tada
Journal of Electroanalytical Chemistry, 529, 1, 20, 27, 28 Jun. 2002, [Peer-reviewed]
English, Scientific journal

Construction of mixed mercaptopropionic acid/alkanethiol monolayers of controlled composition by structural control of a gold substrate with underpotentially deposited lead atoms
Katsuaki Shimazu; Toshikazu Kawaguchi; Takao Isomura
Journal of the American Chemical Society, 124, 4, 652, 661, 30 Jan. 2002, [Peer-reviewed]
English, Scientific journal

Composition control of mixed 2-aminoethanethiol/octadecanethiol monolayers by underpotentially deposited lead on gold
Toshikazu Kawaguchi; Katsuaki Shimazu
Chemistry Letters, 1, 90, 91, Chemical Society of Japan, 2001, [Peer-reviewed]
English, Scientific journal

Electrochemical quartz crystal microbalance investigation of the reductive desorption of self-assembled monolayers of alkanethiols and mercaptoalkanoic acids on Au
Toshikazu Kawaguchi; Hiroaki Yasuda; Katsuaki Shimazu; Marc D. Porter
Langmuir, 16, 25, 9830, 9840, ACS, 12 Dec. 2000, [Peer-reviewed]
English, Scientific journal

Underpotential deposition of zinc ions on polycrystalline platinum: FTIR and EQCM study
Akiko Aramata; Satoru Terui; Satoshi Taguchi; Toshikazu Kawaguchi; Katsuaki Shimazu
Electrochimica Acta, 41, 5, 761, 765, Apr. 1996, [Peer-reviewed]
English, Scientific journal

■ Other Activities and Achievements

二次免疫反応を利用した表面プラズモン共鳴バイオセンサ
川口俊一; KABIRAZ Dulal; 森田金市; 高橋昌志, 電気化学会大会講演要旨集(CD-ROM), 85th, ROMBUNNO.1B12, 23 Feb. 2018
Japanese

SPR BIOSENSING FOR DETECTION OF BETA AGONIST IN URINE OF COW
KABIRAZ Dulal; 森田金市; 川口俊一; 高橋昌志, Proceedings of the Chemical Sensor Symposium, 62, 67, 69, Sep. 2017
電気化学会化学センサ研究会, English

KINETIC STUDY OF SECONDARY IMMUNOREACTION IN INDIRECT COMPETITIVE INHIBITION IMMUNOASSAY
Kabiraz Dulal; 森田金市; 川口俊一, Proceedings of the Chemical Sensor Symposium, 61, 127, 129, Mar. 2017
電気化学会化学センサ研究会, English

Surface Plasmon Resonance Immunosensor Using Au Nanoparticle
KABIRAZ Dulal; 森田金市; 川口俊一; 川口俊一, 日本分析化学会年会講演要旨集, 65th, 115, 31 Aug. 2016
Japanese

澱粉工場廃液に含まれるリンの定量及び金属電極を用いたリン回収の検討
鎌田詢也; 上面雅義; 川口俊一; 田中俊逸, 日本分析化学会年会講演要旨集, 65th, 323, 31 Aug. 2016
Japanese

新規蛍光色素を用いた重金属分析用センサの開発
瀧谷明義; 大屋光平; 羽深昭; 川口俊一; 高橋正宏; 佐藤久, 日本水環境学会年会講演集, 50th, 114, 10 Mar. 2016
Japanese

JA士幌じゃがいもでんぷん工場廃液の分析と再利用化への検討
鎌田詢也; 上面雅義; 川口俊一; 田中俊逸, 化学系学協会北海道支部冬季研究発表会講演要旨集(CD-ROM), 2016, ROMBUNNO.P50, 2016
Japanese

アルギン酸‐タンニン酸複合ゲルビーズのストロンチウムに対する吸着評価
高橋慧良; 上面雅義; 川口俊一; 田中俊逸, 化学系学協会北海道支部冬季研究発表会講演要旨集(CD-ROM), 2016, ROMBUNNO.P45, 2016
Japanese

キラルシッフ塩基金属錯体の金表面への吸着構造の解析
大嶋美奈子; 堤友貴; 須永将光; 松野穣; 秋津貴城; 原賢二; 川口俊一, 錯体化学会討論会講演要旨集, 65th, 224, 01 Sep. 2015
Japanese

サイクリックボルタンメトリーを用いた腸管出血性大腸菌O157バイオセンサの開発
山田健太; 矢嶋健人; 川口俊一; 石井聡; 佐野大輔; 高橋正宏; 佐藤久, 日本水環境学会年会講演集, 49th, 504, 16 Mar. 2015
Japanese

DETECTION OF E.COLI. BY USING A THREE-ELECTRODE-SENSOR CHIP
川口俊一; 大森徹; 中村英博; 森田金市; 坂槙有紀恵; 山田健太; 津田収; 佐藤久; 嶋津克明, Chem Sens, 30, Supplement A, 31, 33, 29 Mar. 2014
電気化学会化学センサ研究会, Japanese

平板型電気化学チップを用いた大腸菌の直接検知
川口俊一; 大森徹; 中村英博; 森田金市; 坂槙有紀恵; 山田健太; 津田収; 佐藤久; 嶋津克明, 電気化学会大会講演要旨集, 81st, 275, 29 Mar. 2014
Japanese

表面プラズモン共鳴を利用した病原微生物バイオセンサの開発
坂槙有紀恵; 山田健太; 津田収; 大森徹; 川口俊一; 高橋正宏; 岡部聡; 佐藤久, 日本水環境学会年会講演集, 48th, 221, 17 Mar. 2014
Japanese

DEVELOPMENT OF AUTOMATIC TOTAL SENSING SYSTEM FOR DETECTION OF ILLEGAL CHEMICAL
川口俊一; 森田金市; 鈴木信二, Proceedings of the Chemical Sensor Symposium, 54, 138, 140, Mar. 2013
電気化学会化学センサ研究会, Japanese

New Aspect of Chromatography on Microchip
KAWAGUCHI Toshikazu, ぶんせき, 0, 436, 229, 230, 05 Apr. 2011
Japanese

High-performance surface plasmon resonance immunosensors for TNT detection
Norio Miura; Dhesingh Ravi Shankaran; Toshikazu Kawaguchi; Kiyoshi Matsumoto; Kiyoshi Toko, ELECTROCHEMISTRY, 75, 1, 13, 22, Jan. 2007
English, Book review

Fabrication of novel molecular recognition membranes by physical adsorption and self-assembly for surface plasmon resonance detection of TNT
Dhesingh Ravi Shankaran; Toshikazu Kawaguchi; Sook Jin Kim; Kiyoshi Matsumoto; Kiyoshi Toko; Norio Miura, INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY, 87, 10-11, 771, 781, 2007
English

Evaluation of the molecular recognition of monoclonal and polyclonal antibodies for sensitive detection of 2,4,6-trinitrotoluene (TNT) by indirect competitive surface plasmon resonance immunoassay
Dhesingh Ravi Shankaran; Toshikazu Kawaguchi; Sook Jin Kim; Kiyoshi Matsumoto; Kiyoshi Toko; Norio Miura, ANALYTICAL AND BIOANALYTICAL CHEMISTRY, 386, 5, 1313, 1320, Nov. 2006
English

■ Syllabus

食資源環境論, 2024年, 修士課程, 国際食資源学院

食資源環境特論演習, 2024年, 修士課程, 国際食資源学院

食資源環境特論, 2024年, 修士課程, 国際食資源学院

大学院共通授業科目（一般科目）：自然科学・応用科学, 2024年, 修士課程, 大学院共通科目

食資源特別講義, 2024年, 修士課程, 国際食資源学院

国際プレゼンテーションスキル演習, 2024年, 修士課程, 国際食資源学院

国際実践力演習, 2024年, 修士課程, 国際食資源学院

文系のための自然科学基礎論, 2024年, 修士課程, 国際食資源学院

大学院共通授業科目（一般科目）：複合領域, 2024年, 修士課程, 大学院共通科目

食資源学総論, 2024年, 修士課程, 国際食資源学院

大学院共通授業科目（一般科目）：自然科学・応用科学, 2024年, 修士課程, 大学院共通科目

環境科学総論, 2024年, 修士課程, 環境科学院

化学Ⅰ, 2024年, 学士課程, 全学教育

国際交流Ⅱ, 2024年, 学士課程, 国際本部

■ Research Themes