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

نویسندگان

  • Yoshiaki Miyake
  • Chihiro Ito
  • Masataka Itoigawa
  • Toshihiko Osawa
چکیده

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.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Antioxidative pyranonigrins in rice mold starters and their suppressive effect on the expression of blood adhesion molecules.

Antioxidants having a 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging capacity in rice mold starters, which are used for the preparation of various Japanese fermented foods, and their effectiveness against the expression of blood adhesion molecules were examined. An antioxidant was isolated from the rice mold starters used for shochu and identified as pyranonigrin-S (PG-S) by (1)H-NMR, ...

متن کامل

Effects of Lactic Fermentation by Lactobacillus acidophilus and Lactobacillus plantarum on Antioxidant Characteristics and Lipase and Lipoxygenase Activities of Wheat Germs

Background and Objectives: Wheat germ is the most nutritious part of wheat grains, which has a short shelf-life due to its high lipid contents and presence of lipase and lipoxygenase enzymes. Thus, wheat germs are separated from the whole wheat grains during the flouring process, mostly used as animal foods. The objective of this study was to investigate effects of fermentation by Lactobacillus...

متن کامل

Comparative Studies in the Manufacturing of Acidophilus, Bifidus and Acido-bifidus Milks

ABSTRACT: The “Encyclopedia of Fermented Fresh Milk” has classified Acidophilus and Bifidus milks as Non-traditional fermented milk products. These products contain Lactobacillus acidophilus and Bifidobacterium spp., respectively, that are known as probiotic microoganisms. In this study, some aspects of acidity development, pH measurement and bacterial counts were monitored when these micro-org...

متن کامل

Evaluating the Effect of Diversity of Lactobacillus plantarum Strains Isolated from Different on Their Antagonistic, Antioxidant and Aggregation Activities

Background and Objectives: Lactic acid bacteria are usually involved in the preparation of fermented foods and can produce different metabolites according to their strain type. The aim of this study was to evaluate the antimicrobial, antioxidant and aggregation activities of 10 different strains of Lactobacillus plantarum isolated from native fermented foods including Koozeh cheese, fermented o...

متن کامل

Antimicrobial Effects of Lactobacillus Plantarum and Pediococcus Acidilactici Bioprotective Starters against Foodborne Pathogens in Fermented Chicken Meats

Background and Objectives: Bioprotective starters, especially lactic acid bacteria, are used in fermentation and biological preservation of the meat products and considered as appropriate substitutes for the chemical preservatives. The aim of this study was to use Lactobacillus plantarum and Pediococcus acidilactici as bioprotective cultures and probiotics for the growth control of important fo...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Bioscience, biotechnology, and biochemistry

دوره 71 10  شماره 

صفحات  -

تاریخ انتشار 2007