Hiroharu Tokuda
Tokyo University of Agriculture
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Publication
Featured researches published by Hiroharu Tokuda.
Journal of Fermentation and Bioengineering | 1998
Kotoyoshi Nakanishi; Hiroharu Tokuda; Takahiko Soga; Takahiro Yoshinaga; Masahisa Takeda
The effects of electric current on the fermentation characteristics of yeast were investigated. When 10 mA direct current (DC) or 100 mA alternating current (AC) was applied to the culture broth, significant increases in cell growth and alcohol production rates occurred. The contents of higher alcohols, esters and organic acids in the culture broths to which AC and DC were applied, were different from those in the control culture (no current application). Several compounds such as acetaldehyde and acetic acid, were formed from ethanol as a result of electrode reaction.
Journal of the Society of Brewing, Japan | 2002
Hiroharu Tokuda; Mamoru Nakazawa; Kotoyoshi Nakanishi
Some properties of a non-woven fabric as a support for mycelia immobilization and characteristics of a immobilized mycelia prepared by gas phase cultivation method were examined. Water permeability and water absorbing capacity of the non-woven fabric were second highest among those of supports used in this study. Air permeability of the non-woven fabric was nearly equivalent to those of other supports. The adsorption rate of the proteins was higher in Bio-cube and non-woven fabric A 6. The gas phase cultivation method was applicable to immobilize some mycelia, which could not be immobilized by the liquid phase cultivation method. Furthermore, the productivity of xylanolytic enzyme, amylase and a-glucosidase of Aspergillus sp. immobilized by the gas phase cultivation method were higher than those obtained by liquid culture.
Food Science and Technology Research | 2004
So Sato; Hiroharu Tokuda; Takeo Koizumi; Kotoyoshi Nakanishi
Bioscience, Biotechnology, and Biochemistry | 1995
Hiroharu Tokuda; Kotoyoshi Nakanishi
Japanese Journal of Lactic Acid Bacteria | 2002
Kotoyoshi Nakanishi; Hiroharu Tokuda; Tatsuhiko Ando; Mizuo Yajima; Tomoyoshi Nakajima; Osamu Tanaka; Sadahiro Ohmomo
Bioscience, Biotechnology, and Biochemistry | 1997
Hiroharu Tokuda; Takashi Urata; Kotoyoshi Nakanishi
Journal of the Society of Brewing, Japan | 2002
So Sato; Hiroharu Tokuda; Kotoyoshi Nakanishi
Bioscience, Biotechnology, and Biochemistry | 1998
Hiroharu Tokuda; Keigo Sato; Kotoyoshi Nakanishi
Journal of the Society of Brewing, Japan | 2006
Hiroharu Tokuda; Michiko Tanaka; Hirohito Homma; Kotoyoshi Nakanishi
Grassland Science | 1996
Yasuyo Tomoda; Hiroharu Tokuda; Kotoyoshi Nakanishi; Sadahiro Ohmomo; Toshiaki Kono; Yutaka Tanno