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Molecules

Title:		The Combined Effect of Lactic Acid Bacteria and Galactomyces geotrichum Fermentation on the Aroma Composition of Sour Whey
Author(s):		Szudera-Konczal K; Myszka K; Kubiak P; Drabinska N; Majcher MA;
Address:		"Faculty of Food Science and Nutrition, Poznan University of Life Sciences, 60-624 Poznan, Poland"
Journal Title:		Molecules
Year:		2023
Volume:		20230524
Issue:		11
Page Number:		-
DOI:		10.3390/molecules28114308
ISSN/ISBN:		1420-3049 (Electronic) 1420-3049 (Linking)
Abstract:		"The increase in demand for food flavorings due to the shortening and simplification of food production technology also entails an increase in the demand for new technologies for their production. The biotechnological production of aromas is a solution characterized by a high efficiency, an independence from environmental factors and a relatively low cost. In this study, the influence of the implementation of lactic acid bacteria pre-fermentation into the production of aroma compounds by Galactomyces geotrichum on a sour whey medium on the intensity of the obtained aroma composition was analyzed. The monitoring of the culture in terms of biomass buildup, the concentration of selected compounds, and the pH resulted in the confirmation of interactions between the analyzed microorganisms. The post-fermentation product underwent a comprehensive sensomic analysis for the identification and quantification of the aroma-active compounds. The use of gas chromatography-olfactometry (GC-O) analysis and the calculation of odor activity values (OAVs) allowed 12 key odorants to be identified in the post-fermentation product. The highest OAV was found for phenylacetaldehyde with a honey odor (1815). The following compounds with the highest OAVs were 2,3-butanedione with a buttery aroma (233), phenylacetic acid with a honey aroma (197), 2,3-butanediol with a buttery aroma (103), 2-phenylethanol with a rosy aroma (39), ethyl octanoate with a fruity aroma (15), and ethyl hexanoate with a fruity aroma (14)"
Keywords:		Odorants/analysis *Lactobacillales Whey/chemistry Fermentation Olfactometry/methods Whey Proteins/analysis *Volatile Organic Compounds/analysis Gc-o Galactomyces geotrichum Lab Oav aroma biotechnology aroma-active compounds sour whey stable isotope diluti;
Notes:		"MedlineSzudera-Konczal, Kamila Myszka, Kamila Kubiak, Piotr Drabinska, Natalia Majcher, Malgorzata Anna eng 2017/25/B/NZ9/01520/National Science Center/ Switzerland 2023/06/10 Molecules. 2023 May 24; 28(11):4308. doi: 10.3390/molecules28114308"