Wang Yuehui, Liang Huixin, Hu Zhongyuan, Chen Lei, Zhu Lijie, Zhuang Kun, Ding Wenping, Shen Qian
Key Laboratory for Deep Processing of Major Grain and Oil, Ministry of Education, School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430048, China.
School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan, Hubei 430048, China.
Food Chem X. 2025 May 9;28:102516. doi: 10.1016/j.fochx.2025.102516. eCollection 2025 May.
Rice bran (RB) as an available agricultural by-product is currently underutilized due to its susceptibility to oxidation and rancidity. This study investigated the evaluation of flavor properties in RB by solid-state fermentation with yeast (). The volatile compounds (VOCs) in fermented RB were detected by chromatography-ion mobility spectrometry (GC-IMS), and headspace solid-phase microextraction gas chromatography-mass spectrometry (HS-SPME-GC-MS). A total of 76 volatile compounds (VOCs) including 10 aldehydes, 6 ketones, 9 alcohols, 20 esters, 10 hydrocarbons, 10 acids, and 11 compounds from other classes were identified. The odor intensity of RB fermentation by yeast was enhanced, especially for sulfides, hydrocarbons, and aromatic compounds. The fermented rice bran (FRB) exhibited a more diverse aroma profile, characterized by wine-like, fruity, and sweet odors, which significantly improved the overall sensory qualities of RB. This study provided the fermentation method for rice processing to promote the deep processing of by-products for more food resources.
米糠(RB)作为一种可用的农业副产品,由于其易氧化和酸败,目前未得到充分利用。本研究通过酵母固态发酵对米糠的风味特性进行了评估。采用色谱-离子迁移谱(GC-IMS)和顶空固相微萃取气相色谱-质谱联用(HS-SPME-GC-MS)检测发酵米糠中的挥发性化合物(VOCs)。共鉴定出76种挥发性化合物,包括10种醛类、6种酮类、9种醇类、20种酯类、10种烃类、10种酸类和11种其他类别的化合物。酵母发酵米糠的气味强度增强,尤其是硫化物、烃类和芳香族化合物。发酵米糠(FRB)呈现出更多样化的香气特征,具有类似葡萄酒、水果和甜味的气味,显著改善了米糠的整体感官品质。本研究为大米加工提供了发酵方法,以促进副产品的深加工,从而获得更多的食物资源。