Isolation of the antioxidant pyranonigrin-A from rice mold starters used in the manufacturing process of fermented foods.

Isolation of the antioxidant pyranonigrin-A from rice mold starters used in the manufacturing process of fermented foods. Research Abstract Details 

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Isolation of the antioxidant pyranonigrin-A from rice mold starters used in the manufacturing process of fermented foods. Abstract Text:

Yoshiaki Miyake,Chihiro Ito,Masataka Itoigawa,Toshihiko Osawa,Yoshiaki Miyake,Chihiro Ito,Masataka Itoigawa,Toshihiko Osawa,

Rice mold starters prepared from Aspergillus species are commonly used for the manufacture of koji in the production of oriental fermented foods. Methanol extracts of rice mold starters fermented by the Aspergillus species, A. awamori, A. kawachii, A. oryzae, A. saitoi, and A. sojae, were examined for their antioxidative activity by using a 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging system. The extracts of A. awamori, A. kawachii, and A. saitoi exhibited higher activity than those of A. oryzae and A. sojae. An antioxidant was isolated from the extract of A. saitoi and identified as pyranonigrin-A by 1H-NMR, 13C-NMR, and FAB-MS analyses. The antioxidative activity of pyranonigrin-A was approximately equivalent to that of ferulic acid, an antioxidant in cereal grain. It was present in rice mold starters prepared by A. awamori, A. kawachii, and A. saitoi, although there was no pyranonigrin-A in the A. oryzae and A. sojae starters. The results suggest that the content of pyranonigrin-A in rice mold starters has a correlation with the antioxidative activity, and that it is induced in rice mold starters at the sporulation stage.

Isolation of the antioxidant pyranonigrin-A from rice mold starters used in the manufacturing process of fermented foods. Publishing Authors By Initials

Y Miyake,C Ito,M Itoigawa,T Osawa,Y Miyake,C Ito,M Itoigawa,T Osawa,

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Isolation of the antioxidant pyranonigrin-A from rice mold starters used in the manufacturing process of fermented foods. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Bioscience, biotechnology, and biochemistry

VOLUME: 71

Page Numbers: 2515-21

Journal Abbreviation: Biosci. Biotechnol. Biochem.

ISSN: 0916-8451

DAY: 7

MONTH: 10

YEAR: 2007

Isolation of the antioxidant pyranonigrin-A from rice mold starters used in the manufacturing process of fermented foods. Information

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LANGUAGE: eng

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AFFILIATION: Faculty of Human Wellness, Tokaigakuen University, Japan. miyakeyo@tokaigakuen-u.ac.jp

Country: Japan

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MEDLINETA: Biosci Biotechnol Biochem

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