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J Agric Food Chem

Title:		Key Odorants of Raw and Cooked Green Kohlrabi (Brassica oleracea var. gongylodes L.)
Author(s):		Marcinkowska M; Frank S; Steinhaus M; Jelen HH;
Address:		"Faculty of Food Science and Nutrition, Poznan University of Life Sciences, Wojska Polskiego 31, 60-624 Poznan, Poland. Leibniz Institute for Food Systems Biology at the Technical University of Munich, Lise-Meitner-Strasse 34, 85354 Freising, Germany"
Journal Title:		J Agric Food Chem
Year:		2021
Volume:		20211005
Issue:		41
Page Number:		12270 - 12277
DOI:		10.1021/acs.jafc.1c04339
ISSN/ISBN:		1520-5118 (Electronic) 0021-8561 (Linking)
Abstract:		"Volatile compounds of raw and cooked green kohlrabi were investigated using a sensomics approach. A total of 55 odor-active compounds were detected and identified in raw and cooked green kohlrabi using GC-O. Twenty-eight odor-active compounds with high flavor dilution (FD) factors ranging from 64 to 1024 were quantitated, and odor activity values (OAVs) were determined. Eight compounds showed high OAVs in raw and cooked kohlrabi: five sulfur compounds (dimethyl trisulfide, methyl 2-methyl-3-furyl disulfide, and three isothiocyanates (1-isothiocyanato-3-(methylsulfanyl)propane, benzyl isothiocyanate, and 1-isothiocyanato-4-(methylsulfanyl)butane)), two lipid oxidation products (1-octen-3-one and trans-4,5-epoxy-(2E)-dec-2-enal), and 2-isopropyl-3-methoxypyrazine. Among these, the sulfur compounds contributed most to the overall smell of the raw and cooked vegetables. The quantitation analysis indicates that the eight odorants are the backbone compounds for raw and cooked kohlrabi. The OAVs for the backbone compounds and also for minor odorants are clearly higher in raw kohlrabi than in the cooked one. Differences can be explained by the influence of the cooking process"
Keywords:		*Brassica Cooking Flavoring Agents Gas Chromatography-Mass Spectrometry Odorants/analysis Smell *Volatile Organic Compounds/analysis Gc-o aroma extract dilution analysis (AEDA) isothiocyanate (ITC) kohlrabi (Brassica oleracea var.gongylodes L.) nitrile o;
Notes:		"MedlineMarcinkowska, Monika Frank, Stephanie Steinhaus, Martin Jelen, Henryk H eng 2021/10/06 J Agric Food Chem. 2021 Oct 20; 69(41):12270-12277. doi: 10.1021/acs.jafc.1c04339. Epub 2021 Oct 5"