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J Sci Food Agric

Title:		Removal of C9-aldehydes and -alcohols from melon juice via cysteine addition
Author(s):		Aboshi T; Narita K; Katsumi N; Ohta T; Murayama T;
Address:		"Faculty of Agriculture, Yamagata University, Tsuruoka, Japan. Yamagata Integrated Agricultural Research Center, Minorigaoka, Yamagata, Japan"
Journal Title:		J Sci Food Agric
Year:		2022
Volume:		20220526
Issue:		13
Page Number:		6131 - 6137
DOI:		10.1002/jsfa.11965
ISSN/ISBN:		1097-0010 (Electronic) 0022-5142 (Linking)
Abstract:		"BACKGROUND: The aroma of a melon fruit is among the most crucial qualities that influence consumer preferences. However, strong grassy and cucumber-like aromas can prevent consumer acceptance. These grassy and cucumber-like aromas are produced by aldehydes containing nine-carbon chains. Several studies have revealed that aldehydes exhibit a high affinity toward cysteine. Thus, the effect of adding cysteine to volatile compounds to melon juice was investigated. RESULTS: The volatile compounds released from the melon juice were analyzed via solid-phase microextraction coupled with gas chromatography-mass spectrometry (SPME-GC-MS) after 0.5, 5, and 24 h of adding cysteine. The results indicated that the concentrations of aldehydes, such as (E,Z)-2,6-nonadienal and (E)-2-nonenal, in the melon juice decreased after the addition of cysteine at all the analyzed times. Additionally, (E)-2-nonenol and (E,Z)-2,6-nonadien-1-ol, which were formed by the enzymatic reduction of the aldehydes, also decreased by cysteine addition. To confirm the binding of cysteine with the aldehydes, two cysteine adducts were analyzed via liquid chromatography-mass spectrometry (LC-MS) employing (E)-2-nonenal in the melon juice after the addition of cysteine. CONCLUSION: This study demonstrates that cysteine addition could be potentially used to reduce the grassy and cucumber-like aromas of melon juice. (c) 2022 Society of Chemical Industry"
Keywords:		Alcohols/analysis Aldehydes/analysis *Cucumis sativus *Cucurbitaceae/chemistry Cysteine Odorants/analysis Solid Phase Microextraction/methods *Volatile Organic Compounds/chemistry C9-alcohol C9-aldehyde gas chromatography-mass spectrometry melon juice;
Notes:		"MedlineAboshi, Takako Narita, Konami Katsumi, Naoyuki Ohta, Tomoya Murayama, Tetsuya eng England 2022/04/29 J Sci Food Agric. 2022 Oct; 102(13):6131-6137. doi: 10.1002/jsfa.11965. Epub 2022 May 26"