Works by Yokoyama, Tomoya

Results: 66

Revisiting the condensation reaction of lignin in alkaline pulping with quantitativity part I: the simplest condensation between vanillyl alcohol and creosol under soda cooking conditions.

Published in:

Journal of Wood Science, 2021, v. 67, n. 1, p. 1, doi. 10.1186/s10086-021-01978-4

By:

Komatsu, Toshihiro;
Yokoyama, Tomoya

Publication type:

Article

Effect of side-chain length in lignin model compound on MnO2 oxidation: comparison of oxidations between C6-C2- and C6-C1-type compounds.

Published in:

Journal of Wood Science, 2021, v. 67, n. 1, p. 1, doi. 10.1186/s10086-021-01964-w

By:

Sun, Shirong;
Yokoyama, Tomoya

Publication type:

Article

Revisiting the mechanism of β-O-4 bond cleavage during acidolysis of lignin VII: acidolyses of non-phenolic C6-C2-type model compounds using HBr, HCl and H2SO4, and a proposal on the characteristic action of Br− and Cl−.

Published in:

Journal of Wood Science, 2020, v. 66, n. 1, p. 1, doi. 10.1186/s10086-020-01928-6

By:

Ye, Qiaoqiao;
Yokoyama, Tomoya

Publication type:

Article

Effects of aromatic ring type on reactions subsequent to the β-O-4 bond cleavage of non-phenolic lignin model compounds under alkaline pulping conditions.

Published in:

Journal of Wood Science, 2018, v. 64, n. 5, p. 664, doi. 10.1007/s10086-018-1739-3

By:

Shimizu, Satoko;
Posoknistakul, Pattaraporn;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Stereo-preference in the degradation of the erythro and threo isomers of β-O-4-type lignin model compounds in oxidation processes III: in the reaction with chlorine- and manganese-based oxidants.

Published in:

Journal of Wood Science, 2018, v. 64, n. 4, p. 451, doi. 10.1007/s10086-018-1714-z

By:

Posoknistakul, Pattaraporn;
Akiho, Satoru;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Predominant formation of aromatic aldehyde and acid from a dimeric β- O-4-type lignin model compound under hydrogen peroxide bleaching conditions with high pH levels.

Published in:

Journal of Wood Science, 2017, v. 63, n. 2, p. 173, doi. 10.1007/s10086-017-1609-4

By:

Posoknistakul, Pattaraporn;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Effect of type of aromatic nucleus in lignin on the rate of the β- O-4 bond cleavage during alkaline pulping process.

Published in:

Journal of Wood Science, 2015, v. 61, n. 5, p. 529, doi. 10.1007/s10086-015-1488-5

By:

Shimizu, Satoko;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Effect of stereo-configurational difference of carbohydrate model compound on the reaction with active oxygen species under oxygen delignification conditions.

Published in:

Journal of Wood Science, 2015, v. 61, n. 5, p. 510, doi. 10.1007/s10086-015-1499-2

By:

Nakagawa, Akihiko;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Synergistic contribution of hydrosulfide and carbonate anions to the β- O-4 bond cleavage of lignin model compounds in a green liquor pretreatment for enzymatic hydrolysis of lignocellulosic materials.

Published in:

Journal of Wood Science, 2014, v. 60, n. 5, p. 346, doi. 10.1007/s10086-014-1411-5

By:

Gu, Feng;
Posoknistakul, Pattaraporn;
Shimizu, Satoko;
Yokoyama, Tomoya;
Jin, Yongcan;
Matsumoto, Yuji

Publication type:

Article

Enzymatic hydrolysis of wood with alkaline treatment.

Published in:

Journal of Wood Science, 2013, v. 59, n. 6, p. 484, doi. 10.1007/s10086-013-1359-x

By:

Oka, Dai;
Kobayashi, Kayoko;
Isobe, Noriyuki;
Ogawa, Yu;
Yokoyama, Tomoya;
Kimura, Satoshi;
Kim, Ung-Jin;
Tokuyasu, Ken;
Wada, Masahisa

Publication type:

Article

Significance of benzylic hydroxymethylene group in the reaction of lignin side-chain with active oxygen species under oxygen bleaching conditions.

Published in:

Journal of Wood Science, 2013, v. 59, n. 4, p. 337, doi. 10.1007/s10086-013-1339-1

By:

Ohmura, Satoshi;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Investigation on the hydrogen abstraction from methyl glucoside by active oxygen species under oxygen delignification conditions IV: appearance of kinetic isotope effect in the reaction between methyl glucoside and deuterated methyl glucoside.

Published in:

Journal of Wood Science, 2012, v. 58, n. 6, p. 563, doi. 10.1007/s10086-012-1289-z

By:

Nakagawa, Akihiko;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Progress of oxidation of non-phenolic lignin moiety in an oxygen bleaching process via the conversion of non-phenolic into phenolic lignin moiety.

Published in:

Journal of Wood Science, 2012, v. 58, n. 3, p. 243, doi. 10.1007/s10086-011-1244-4

By:

Ohmura, Satoshi;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Investigation on hydrogen abstraction from methyl glucoside by active oxygen species under oxygen delignification conditions III: effects of the origin of active oxygen species.

Published in:

Journal of Wood Science, 2011, v. 57, n. 6, p. 512, doi. 10.1007/s10086-011-1201-2

By:

Yokoyama, Tomoya;
Nakagawa, Akihiko;
Konishi, Fumiko;
Matsumoto, Yuji

Publication type:

Article

Revisiting the mechanism of β-O-4 bond cleavage during acidolysis of lignin IV: dependence of acidolysis reaction on the type of acid.

Published in:

Journal of Wood Science, 2011, v. 57, n. 3, p. 219, doi. 10.1007/s10086-010-1166-6

By:

Imai, Takaaki;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Application of the amount of oxygen consumption to the investigation of the oxidation mechanism of lignin during oxygen-alkali treatment.

Published in:

Journal of Wood Science, 2008, v. 54, n. 1, p. 62, doi. 10.1007/s10086-007-0906-8

By:

Aiko Imai;
Iori Tomoda;
Tomoya Yokoyama;
Yuji Matsumoto;
Gyosuke Meshitsuka;
Guolin Tong

Publication type:

Article

Enhancement of the reaction between pulp components and hydroxyl radical produced by the decomposition of hydrogen peroxide under alkaline conditions.

Published in:

Journal of Wood Science, 2002, v. 48, n. 3, p. 191, doi. 10.1007/BF00771366

By:

Yokoyama, Tomoya;
Matsumoto, Yuji;
Meshitsuka, Gyosuke

Publication type:

Article

Analysis of progress of oxidation reaction during oxygen-alkali treatment of lignin I: method and its application to lignin oxidation.

Published in:

Journal of Wood Science, 2000, v. 46, n. 1, p. 32, doi. 10.1007/BF00779550

By:

Tong, Guolin;
Yokoyama, Tomoya;
Matsumoto, Yuji;
Meshitsuka, Gyosuke

Publication type:

Article

Reaction selectivity of active oxygen species produced by oxygen-alkali oxidation of a phenolic compound.

Published in:

Journal of Wood Science, 1998, v. 44, n. 5, p. 421, doi. 10.1007/BF01130459

By:

Yokoyama, Tomoya;
Maekawa, Iwao;
Matsumoto, Yuji;
Meshitsuka, Gyosuke

Publication type:

Article

Arterial spin labeling imaging correlates with the angiographic and clinical vascularity of vestibular schwannomas.

Published in:

Neuroradiology, 2020, v. 62, n. 4, p. 463, doi. 10.1007/s00234-019-02358-y

By:

Tanaka, Yujiro;
Kohno, Michihiro;
Hashimoto, Takao;
Nakajima, Nobuyuki;
Izawa, Hitoshi;
Okada, Hirofumi;
Ichimasu, Norio;
Matsushima, Ken;
Yokoyama, Tomoya

Publication type:

Article

Practical high-yield production of vanillins from kraft or soda lignin using highly alkaline hydrogen peroxide treatment.

Published in:

Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 2025, v. 79, n. 4/5, p. 202, doi. 10.1515/hf-2024-0121

By:

Kuwabara, Masato;
Katsumata, Kyoko S.;
Komatsu, Toshihiro;
Yokoyama, Tomoya

Publication type:

Article

Formation rate of benzyl cations in various aqueous solutions containing different concentrations of acid but with a specific proton activity in lignin acidolysis.

Published in:

Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 2022, v. 76, n. 8, p. 722, doi. 10.1515/hf-2022-0053

By:

Ito, Hiroaki;
Yokoyama, Tomoya

Publication type:

Article

Effect of solvent type on the formation rate of benzyl cation intermediate in acidolysis of lignin.

Published in:

Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 2022, v. 76, n. 3, p. 223, doi. 10.1515/hf-2021-0193

By:

Hirata, Masaki;
Yokoyama, Tomoya

Publication type:

Article

Effects of lignin structure and solvent on the formation rate of quinone methide under alkaline conditions.

Published in:

Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 2020, v. 74, n. 6, p. 559, doi. 10.1515/hf-2019-0269

By:

Yamauchi, Fuyu;
Ito, Toko;
Kawamoto, Osamu;
Komatsu, Toshihiro;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Variation of the contents of biphenyl structures in lignins among wood species.

Published in:

Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 2019, v. 73, n. 6, p. 569, doi. 10.1515/hf-2018-0196

By:

Hirayama, Haruka;
Akiyama, Takuya;
Tamai, Akari;
Nawawi, Deded S.;
Syafii, Wasrin;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Investigation of hydrogen abstraction from methyl glucoside by active oxygen species under oxygen delignification conditions. Part 1: Study on the anomeric position.

Published in:

Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 2009, v. 63, n. 1, p. 52, doi. 10.1515/HF.2009.020

By:

Fumiko Konishi;
Tomoya Yokoyama;
Yuji Matsumoto

Publication type:

Article

Research Article.

Published in:

Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 2008, v. 62, n. 2, p. 164

By:

Tomoya Yokoyama;
Yuji Matsumoto

Publication type:

Article

Characterization of active oxygen species under oxygen-alkali bleaching conditions.

Published in:

Holzforschung: International Journal of the Biology, Chemistry, Physics, & Technology of Wood, 2005, v. 59, n. 3, p. 269, doi. 10.1515/HF.2005.044

By:

Tomoya Yokoyama;
Yuji Matsumoto;
Gyosuke Meshitsuka

Publication type:

Article

AFM observation of ultrathin microfibrils in fruit tissues.

Published in:

Cellulose, 2010, v. 17, n. 1, p. 13, doi. 10.1007/s10570-009-9361-6

By:

Niimura, Hiroshi;
Yokoyama, Tomoya;
Kimura, Satoshi;
Matsumoto, Yuji;
Kuga, Shigenori

Publication type:

Article

Revisiting the mechanism of β-O-4 bond cleavage during acidolysis of lignin. Part 9: Comprehensive results for guaiacyl-type compounds and the difference in participation mode of bromide and chloride anions between C6-C3-type and C6-C2-type compounds

Published in:

Journal of Wood Chemistry & Technology, 2024, v. 44, n. 3, p. 147, doi. 10.1080/02773813.2024.2314477

By:

Ye, Qiaoqiao;
Katsumata, Kyoko S.;
Komatsu, Toshihiro;
Yokoyama, Tomoya

Publication type:

Article

Promotive or suppressive effect of co-existing nucleophiles on lignin condensation in alkaline pulping processes.

Published in:

Journal of Wood Chemistry & Technology, 2023, v. 43, n. 2, p. 67, doi. 10.1080/02773813.2023.2183968

By:

Komatsu, Toshihiro;
Yamauchi, Kazutaka;
Yokoyama, Tomoya

Publication type:

Article

Revisiting the condensation reaction of lignin in alkaline pulping with quantitativity. Part 2: evaluation of self-condensation of vanillyl alcohol compared with its condensation with creosol under soda cooking conditions.

Published in:

Journal of Wood Chemistry & Technology, 2022, v. 42, n. 5, p. 361, doi. 10.1080/02773813.2022.2096636

By:

Komatsu, Toshihiro;
Yokoyama, Tomoya

Publication type:

Article

Revisiting the mechanism of β-O-4 bond cleavage during acidolysis of lignin. Part 8: Comparison between phenolic and non-phenolic C6-C2-type model compounds.

Published in:

Journal of Wood Chemistry & Technology, 2021, v. 41, n. 6, p. 294, doi. 10.1080/02773813.2021.1986072

By:

Ye, Qiaoqiao;
Yokoyama, Tomoya

Publication type:

Article

Syringyl ratio and its relation to the erythro ratio of β-O-4-structure in leaf cell walls.

Published in:

Journal of Wood Chemistry & Technology, 2021, v. 41, n. 2/3, p. 118, doi. 10.1080/02773813.2021.1916533

By:

Xu, Zeming;
Nakamura, Hirotaka;
Akiyama, Takuya;
Yokoyama, Tomoya;
Jin, Zhenfu;
Sasaki, Kiyokuni;
Matsumoto, Yuji

Publication type:

Article

Contribution of the γ-hydroxy group to the β-O-4 bond cleavage of lignin model compounds in a basic system using tert-butoxide.

Published in:

Journal of Wood Chemistry & Technology, 2020, v. 40, n. 5, p. 348, doi. 10.1080/02773813.2020.1812660

By:

Zeng, Xu;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Effect of Counter Cation on Alkaline Reaction of β-O-4-Type Substructure in Lignin.

Published in:

Journal of Wood Chemistry & Technology, 2019, v. 39, n. 2, p. 111, doi. 10.1080/02773813.2018.1508302

By:

Kato, Yuishin;
Shimizu, Satoko;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Chemical Factors Underlying the More Rapid β- O -4 Bond Cleavage of Syringyl than Guaiacyl Lignin under Alkaline Delignification Conditions.

Published in:

Journal of Wood Chemistry & Technology, 2017, v. 37, n. 6, p. 451, doi. 10.1080/02773813.2017.1340957

By:

Shimizu, Satoko;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Characteristics and Reactivity of Lignin in Acacia and Eucalyptus Woods.

Published in:

Journal of Wood Chemistry & Technology, 2017, v. 37, n. 4, p. 273, doi. 10.1080/02773813.2017.1291684

By:

Nawawi, Deded Sarip;
Syafii, Wasrin;
Tomoda, Iori;
Uchida, Yosuke;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Stereo-Preference in the degradation of the erythro and threo isomers of β-O -4-type lignin model compounds in oxidation processes. part 2: In the reaction with hydroxyl and oxyl anion radicals under hydrogen peroxide bleaching conditions.

Published in:

Journal of Wood Chemistry & Technology, 2017, v. 37, n. 2, p. 87, doi. 10.1080/02773813.2016.1235588

By:

Posoknistakul, Pattaraporn;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Formation rate of benzyl cation intermediate from p -Hydroxyphenyl, guaiacyl, or syringyl nucleus in acidolysis of lignin.

Published in:

Journal of Wood Chemistry & Technology, 2017, v. 37, n. 2, p. 75, doi. 10.1080/02773813.2016.1235587

By:

Shioya, Toshinao;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Analysis of Lignin Aromatic Structure in Wood Fractions Based on IR Spectroscopy.

Published in:

Journal of Wood Chemistry & Technology, 2016, v. 36, n. 5, p. 377, doi. 10.1080/02773813.2016.1179325

By:

Huang, Yu;
Wang, Zhiguo;
Wang, Linshan;
Chao, Yuesheng;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Stereo-Preference in the Degradation of the Erythro and Threo Isomers of β ‐ O ‐4‐Type Lignin Model Compounds in Oxidation Processes: Part 1: In the Reaction with Active Oxygen Species Under Oxygen Delignification Conditions.

Published in:

Journal of Wood Chemistry & Technology, 2016, v. 36, n. 4, p. 288, doi. 10.1080/02773813.2016.1138133

By:

Posoknistakul, Pattaraporn;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Hemicellulose Composition in Different Cell Wall Fractions Obtained using a DMSO/LiCl Wood Solvent System and Enzyme Hydrolysis.

Published in:

Journal of Wood Chemistry & Technology, 2016, v. 36, n. 1, p. 56, doi. 10.1080/02773813.2015.1074248

By:

Huang, Yu;
Wang, Zhiguo;
Wang, Linshan;
Chao, Yuesheng;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Relationships between Hemicellulose Composition and Lignin Structure in Woods.

Published in:

Journal of Wood Chemistry & Technology, 2016, v. 36, n. 1, p. 9, doi. 10.1080/02773813.2015.1039543

By:

Huang, Yu;
Wang, Linshan;
Chao, Yuesheng;
Nawawi, Deded Sarip;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Investigation on the Hydrogen Abstraction from Methyl Glucoside by Active Oxygen Species Under Oxygen Delignification Conditions. Part 5: Comprehensive Results on Experiments Using Deuterium-Labeled Methyl Glucosides.

Published in:

Journal of Wood Chemistry & Technology, 2015, v. 35, n. 6, p. 450, doi. 10.1080/02773813.2015.1039134

By:

Yokoyama, Tomoya;
Nakagawa, Akihiko;
Matsumoto, Yuji

Publication type:

Article

Revisiting the Mechanism of β- O -4 Bond Cleavage During Acidolysis of Lignin. Part 6: A Review.

Published in:

Journal of Wood Chemistry & Technology, 2014, v. 35, n. 1, p. 27, doi. 10.1080/02773813.2014.881375

By:

Yokoyama, Tomoya

Publication type:

Article

Fractionation and Characterization of Wood Cell Wall Components of Fagus crenata Blume Using LiCl/DMSO Solvent System.

Published in:

Journal of Wood Chemistry & Technology, 2013, v. 33, n. 3, p. 188, doi. 10.1080/02773813.2013.773042

By:

Wang, Zhiguo;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Structure of Cell Wall Components in the Sapwood of Quercus serrata Thunb. Attacked by Platypus quercivorous.

Published in:

Journal of Wood Chemistry & Technology, 2013, v. 33, n. 1, p. 65, doi. 10.1080/02773813.2012.739254

By:

YAMAGISHI, TAKAYUKI;
YOKOYAMA, TOMOYA;
YAMADA, TOSHIHIRO;
MATSUMOTO, YUJI

Publication type:

Article

Analysis of Lignin Aromatic Structure in Wood Based on the IR Spectrum.

Published in:

Journal of Wood Chemistry & Technology, 2012, v. 32, n. 4, p. 294, doi. 10.1080/02773813.2012.666316

By:

Huang, Yu;
Wang, Linshan;
Chao, Yuesheng;
Nawawi, Deded Sarip;
Akiyama, Takuya;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article

Revisiting the Mechanism of β - O -4 Bond Cleavage During Acidolysis of Lignin: Part 5: On the Characteristics of Acidolysis Using Hydrobromic Acid.

Published in:

Journal of Wood Chemistry & Technology, 2012, v. 32, n. 2, p. 165, doi. 10.1080/02773813.2011.624668

By:

Imai, Takaaki;
Yokoyama, Tomoya;
Matsumoto, Yuji

Publication type:

Article