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Pigmented edible bean coats as natural sources of polyphenols with antioxidant and antibacterial effects

Journal name:LWT - Food Science and Technology
Literature No.:
Literature Url: http://www.sciencedirect.com/science/article/pii/S0023643816303449
Date publication:November 2016
Food preservatives are important for the storage of foods, and natural polyphenols with antioxidant and antibacterial effects are often effective as food preservatives. In this study, we systemically investigated the phenolic composition, antioxidant and antibacterial effects of 28 pigmented edible bean coat extracts. Most of these bean coat extracts had a relatively high level of total phenolic content, mainly flavonoids and proanthocyanidins, and they also exhibited much higher antioxidant effect than most common fruits, vegetables and cereal grains. In addition, most of them showed antibacterial effects, mainly against gram-positive bacteria, higher than the effect of phenol. Correlation analysis and principal component analysis indicated that flavonoids and proanthocyanidins were mostly responsible for the antioxidant and antibacterial effects of these bean coat extracts. Therefore, the pigmented bean coats rich in polyphenols with antioxidant and antibacterial effects are potential candidates as food preservatives.

... Louis, MO, USA), methyl gallate was purchased from Yuanye Bio-tech (Shanghai, China), 
vitexin and isovitexin were purchased from Biopurify Phytochemicals (Chengdu, China), and cyanidin-3-galactoside, malvidin-3-glucoside, cyanidin-3-glucoside and peonidin-3-glucoside ...
 
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