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Journal Article
Review
Identification of a novel umami compound in potatoes and potato chips.
Food Chemistry 2018 Februrary 2
The influence of frying time on the taste profile of potato chips was characterized. Direct comparison of isolates from potato chip samples fried for 170s and 210s indicated longer frying time increased the perceived umami intensity and decreased the sour intensity. The compounds responsible for the greater umami intensity were identified as monosodium l-pyroglutamate (l-MSpG) and monosodium d-pyroglutamate (d-MSpG). The reduction in sour intensity was attributed to the degradation of d-chlorogenic acid. MSpGs were endogenous in raw potatoes and also thermally generated from glutamic acid during frying. Taste recombination studies further confirmed the contribution of both compounds to the umami character of potato chips. Furthermore, time-intensity taste analysis revealed that topical addition of both l- and d-MSpG enhanced the perceived intensity of the umami taste and the overall flavor characteristic of the potato chips.
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