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Gen-ichiro Nonaka

Gen-ichiro Nonaka

D-Index & Metrics

Chemistry

D-Index
72
Citations
13402
World Ranking
5416
National Ranking
329

Overview

Gen-ichiro Nonaka is affiliated with Kyushu University in Japan and has contributed to several research fields including biochemistry, genetics, molecular biology, and medicine. Their work spans across specialized subfields such as molecular biology, biochemistry, applied microbiology and biotechnology, organic chemistry, and toxicology.

The scientist's research focuses primarily on phytochemicals and antioxidant activities, with notable investigations into plant biochemistry and biosynthesis as well as plant gene expression analysis. Additional topics frequently addressed in their publications include tannin, tannase, and anticancer activities, free radicals and antioxidants, and bioactive compounds with antitumor properties.

Their recent published papers include:

  • Highly Oxidized Ellagitannins of Carpinus japonica and Their Oxidation-Reduction Disproportionation, 2020, Journal of Natural Products
  • Ellagitannins and Oligomeric Proanthocyanidins of Three Polygonaceous Plants, 2021, Molecules
  • Yellow pigments produced by oxidative oligomerization of dihydrochalcone glucoside and the reaction mechanism, 2023, Food Chemistry

Frequent coauthors in their research collaborations include Yosuke Matsuo, Yoshinori Saito, Takashi Tanaka, Yong-Lin Huang, and Dianpeng Li.

The scientist's publications have appeared in various research venues, including the Journal of Natural Products, Molecules, and Food Chemistry.

Best Publications

  • Study on the Inhibitory Effect of Tannins and Flavonoids against the 1,1-Diphenyl-2-picrylhydrazyl Radical

    Takako Yokozawa;Cui Ping Chen;Erbo Dong;Takashi Tanaka

  • Tannins and related compounds. XV. A new class of dimeric flavan-3-ol gallates, theasinensins A and B, and proanthocyanidin gallates from green tea leaf (1)

    Genichiro Nonaka;Osamu Kawahara;Itsuo Nishioka

  • Antitumor Agents, 129. Tannins and Related Compounds as Selective Cytotoxic Agents

    Yoshiki Kashiwada;Gen Ichiro Nonaka;Itsuo Nishioka;Jer Jang Chang

  • Structure and antiherpetic activity among the Tannins

    Masayuki Takechi;Yasuo Tanaka;Manabu Takehara;Gen-Ichiro Nonaka

  • Tannins and Related Compounds. XC. : 8-C-Ascorbyl (-)-Epigallocatechin 3-O-Gallate and Novel Dimeric Flavan -3-ols, Oolonghomobisflavans A and B, from Oolong Tea. (3)

    Fumio Hashimoto;Gen-ichiro Nonaka;Itsuo Nishioka

  • Chemical evidence for the de-astringency (insolubilization of tannins) of persimmon fruit

    Takashi Tanaka;Ryuji Takahashi;Isao Kouno;Gen-ichiro Nonaka

  • Tannins and Related Compounds. I. Rhubarb (1)

    Genichiro Nonaka;Itsuo Nishioka;Tetsuro Nagasawa;Hikokichi Oura

  • Anti-AIDS Agents, 18. Sodium and Potassium Salts of Caffeic Acid Tetramers from Arnebia euchroma as Anti-HIV Agents

    Y. Kashiwada;M. Nishizawa;T. Yamagishi;T. Tanaka

  • Tannins and Related Compounds. LXIX. : Isolation and Structure Elucidation of B, B'-Linked Bisflavanoids, Theasinensins D-G and Oolongtheanin from Oolong Tea. (2)

    Fumio Hashimoto;Gen-Ichiro Nonaka;Itsuo Nishioka

  • Tannins and related compounds. XL: Revision of the structures of punicalin and punicalagin, and isolation and characterization of 2-O-galloylpunicalin from the bark of Punica granatum L.

    Takashi Tanaka;Gen-Ichiro Nonaka;Itsuo Nishioka

  • Magnesium and Ammonium-Potassium Lithospermates B, the Active Principles Having a Uremia-Preventive Effect from Salvia miltiorrhiza

    Takashi Tanaka;Satoshi Morimoto;Gen-ichiro Nonaka;Itsuo Nishioka

  • Tannins as Potent Inhibitors of DNA Topoisomerase II In Vitro

    Yoshiki Kashiwada;Gen-Ichiro Nonaka;Itsuo Nishioka;Kenneth Jiann-Hung Lee;Kenneth Jiann-Hung Lee

  • Hydrolysable tannins and proanthocyanidins from green tea

    Gen-Ichiro Nonaka;Ryo Sakai;Itsuo Nishioka

  • Punicafolin, an ellagitannin from the leaves of Punica granatum

    Takashi Tanaka;Gen-Ichiro Nonaka;Itsuo Nishioka

  • Tannins and Related Compounds. XXXVIII. : Isolation and Characterization of Flavan-3-ol Glucosides and Procyanidin Oligomers from Cassia Bark : Cinnamomum cassia BLUME

    Satoshi Morimoto;Gen-Ichiro Nonaka;Itsuo Nishioka

  • Tannins and Related Compounds. XLII. : Isolation and Characterization of Four New Hydrolyzable Tannins, Terflavins A and B, Tergallagin and Tercatain from the Leaves of Terminalia catappa L.

    Takashi Tanaka;Gen-Ichiro Nonaka;Itsuo Nishioka

  • Tannins and related compounds. Part 5. Isolation and characterization of polygalloylglucoses from Chinese gallotannin

    Makoto Nishizawa;Takashi Yamagishi;Gen-ichiro Nonaka;Itsuo Nishioka

  • Myricatin, a galloyl flavanonol sulfate and prodelphinidin gallates from Myrica rubra

    Gen-Ichiro Nonaka;Makiko Muta;Itsuo Nishioka

  • Tannins and Related Compounds. CXIV. Structure of Novel Fermentation Products, Theogallinin, Theaflavonin and Desgalloyl Theaflavonin from Black Tea, and Changes of Tea Leaf Polyphenols during Fermentation

    Fumio Hashimoto;Gen-ichiro Nonaka;Itsuo Nishioka

  • Tannins and Related Compounds. XLI. : Isolation and Characterization of Novel Ellagitannins, Punicacorteins A, B, C, and D, and Punigluconin from the Bark of Punica granatum L.

    Takashi Tanaka;Gen-Ichiro Nonaka;Itsuo Nishioka

  • Evaluation of the Anti-oxidative Effect (in vitro) of Tea Polyphenols

    Fumio Hashimoto;Masateru Ono;Chikako Masuoka;Yasuyuki Ito

Frequent Co-Authors

Itsuo Nishioka
Itsuo Nishioka Kyushu University
Takashi Tanaka
Takashi Tanaka Nagasaki University
Takako Yokozawa
Takako Yokozawa University of Toyama
Satoshi Morimoto
Satoshi Morimoto Kyushu University
Isao Kouno
Isao Kouno Nagasaki University
Yoshiki Kashiwada
Yoshiki Kashiwada University of Tokushima
Kuo Hsiung Lee
Kuo Hsiung Lee University of Minnesota
Hae Young Chung
Hae Young Chung Pusan National University
Junei Kinjo
Junei Kinjo Fukuoka University
Masami Niwa
Masami Niwa Nagasaki University

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