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Volatile and Sensory Profiles of Different Black Rice (Oryza Sativa L.) Cultivars Varying in Milling Degree

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Journal Food Res Int
Date 2021 Mar 1
PMID 33642016
Citations 6
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Abstract

In this study, we compared the volatile and sensory profiles of various black rice (Oryza sativa L.) cultivars varying in milling degree. In total, 51 volatiles were identified. 2-Acetyl-1-pyrroline (2-AP) was only detected in aromatic cultivars, and the amount varied depending on the cultivar. Additionally, a nonaromatic black rice cultivar (cv. Sinnongheukchal) contained high amounts of guaiacol. Descriptive analyses revealed significant differences in 13 sensory attributes between aromatic and nonaromatic black rice samples. After milling, the intensities of most volatile compound concentrations and sensory attributes decreased. However, the intensities of the "floral," "sweet aroma," and "sweet taste" sensory attributes increased, regardless of the cultivar. Partial least squares regression analysis showed that 2-AP correlated with the "popcorn" sensory attribute of aromatic black rice cultivars, whereas guaiacol was related to the "smoky" sensory attribute of cooked black rice. This information aids in the selection of black rice cultivars for various purposes in the food industry. For example, Heukhyangchal can be used as sources of food additives due to its smoky and popcorn-like aroma.

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