Yongzhu Zhang , Mingxin Liu , Fenghua Wu , Jinmei Li , Fidelis Azi , Ke Yu , Zhiping He , Peng Wang , Changling Wu , Baiyi Lu , Xingquan Liu
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引用次数: 0
Abstract
Highland barley bran (HBB), as a by-product during the milling of highland barley, is under-utilized. Food-grade fungi R. oligosporus and A. elegans were used in this study to improve the food quality of HBB. Macromolecular nutrients were converted into small molecules during fermentation, which was further identified by scanning electron microscope (SEM), particle size, and metabolite analysis. The insoluble fibers were effectively bio-transformed into the soluble form, inducing significant improvements in the bran's physicochemical properties including water-holding capacity, oil-holding capacity, water solubility, and swelling capacity. The antioxidant activity of HBB was also enhanced by fungal fermentation due to the increased phenolics released by fungal enzymes. SPME-GC-MS analysis demonstrated that the HBB's flavors were significantly improved by fungal fermentation due to the increased alcohols, hydrocarbons, and esters. Additionally, R. oligosporus fermentation tended to release phenolics to achieve high antioxidant activities, and A. elegans fermentation preferred to improve physicochemical properties to enhance the processing applicability of HBB, which were mainly due to their individualized metabolic pathways triggered during fermentation. In conclusion, fermentation with probiotic fungi significantly improved the food quality and processing applicability of HBB, implying a high application potential of fermented HBB to develop functional foods.
期刊介绍:
The Journal of Cereal Science was established in 1983 to provide an International forum for the publication of original research papers of high standing covering all aspects of cereal science related to the functional and nutritional quality of cereal grains (true cereals - members of the Poaceae family and starchy pseudocereals - members of the Amaranthaceae, Chenopodiaceae and Polygonaceae families) and their products, in relation to the cereals used. The journal also publishes concise and critical review articles appraising the status and future directions of specific areas of cereal science and short communications that present news of important advances in research. The journal aims at topicality and at providing comprehensive coverage of progress in the field.