Abstract
Volatile components of flavored yogurt preserved at 5°C in the dark for 0 day, 3 days and 10 days were recovered by simultaneous distillation extraction (SDE) and headspace (HS) procedures. Gas chromatography (GC) and GC-mass spectrometry (GC-MS) analyses of those samples showed remarkable changes in some compounds. Aldehydes which contribute to expressing citrusy notes were reduced to alcohols during fermentation process and storage. As a result, the strength of flavors which expressed well-balanced citrusy notes in yogurt were weakened, and fatty or oily notes mainly caused from alcohols were strengthened reversely. Hydrocarbons were also digested by bacteria during a fermentation process. A small amount of other compounds, such as esters and terpene alcohols changed. Fewer effects of sorption into a package material and chemical reactions, such as hydrolysis esters, hydration or oxidation of hydrocarbons, were observed.
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Harasawa, N., Tateba, H., Ishizuka, N., Wakayama, T., Kishino, K., Ono, M. (1998). Flavor Deterioration in Yogurt. In: Shahidi, F., Ho, CT., van Chuyen, N. (eds) Process-Induced Chemical Changes in Food. Advances in Experimental Medicine and Biology, vol 434. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-1925-0_24
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DOI: https://doi.org/10.1007/978-1-4899-1925-0_24
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