| Title: | Free and bound volatile compounds in the Rubus coreanus fruits of different ripening stages |
| Author(s): | Yu AN; Yang YN; Yang Y; Zheng FP; Sun BG; |
| Address: | "Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University (BTBU), Beijing, China. School of Chemistry & Environmental Engineering, Hubei University for Nationalities, Enshi, Hubei, China" |
| ISSN/ISBN: | 1745-4514 (Electronic) 0145-8884 (Linking) |
| Abstract: | "The aim of the present study was to investigate the free and bound volatiles in the Rubus coreanus (RC) fruits of different ripening stages. Thirty-seven free volatiles and 28 bound volatiles were identified in RC fruit for the first time. The contents of free (E)-2-hexen-1-ol, 1-hexanol, 2-heptanol, beta-myrcene, (E), (Z)-beta-ocimene, allo-ocimene, linalool, cosmene, alpha-terpineol, methyl salicylate, eugenol, and beta-damascenone remain high, and increased with the ripening of RC fruit. The contents of 11 bound volatiles decreased during the ripening, and became lower than the contents of their free volatiles in the ripe fruit. The ripe black fruit is closely correlated to the free nonanal, sulcatone, (E)-2-hexen-1-ol, 1-hexanol, 2-heptanol, 1-heptanol, 1-nonanol, (E)-linalool oxide (furanoid), and beta-damascenone, and bound (E)-2-hexen-1-ol and (E)- beta-ocimene. The ripe RC fruit is more fruity and floral than unripe fruit. The gradually hydrolyzed bound volatiles can enhance the fruity, floral, and herbaceous odors. PRACTICAL APPLICATIONS: Rubus coreanus (RC) fruit is a functional natural fruit. Both fresh and processed Rubus coreanus fruits including jams, confitures, wine, yogurt, vinegar, and beverages, as well as ingredients in functional foods or cosmetics have been extensively consumed. However, the free and bound aroma compounds in RC fruit have not been well understood. This work illustrates the contributions of free and bound volatiles to the flavor of RC fruit" |
| Keywords: | Acyclic Monoterpenes/chemistry Aldehydes/chemistry Cyclohexane Monoterpenes/chemistry Fruit/*chemistry/growth & development Odorants/analysis Rubus/chemistry/*growth & development Volatile Organic Compounds/*chemistry Rubus coreanus Bokbunja Cha-tian-pao; |
| Notes: | "MedlineYu, Ai-Nong Yang, Yi-Ni Yang, Yan Zheng, Fu-Ping Sun, Bao-Guo eng Research Support, Non-U.S. Gov't 2019/10/15 J Food Biochem. 2019 Oct; 43(10):e12964. doi: 10.1111/jfbc.12964. Epub 2019 Jun 26" |
