The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 2-Ethylpyrazine( cas:13925-00-3 ) is researched.Product Details of 13925-00-3.Sioriki, Eleni; Lemarcq, Valerie; Alhakim, Fauzan; Triharyogi, Harry; Tuenter, Emmy; Cazin, Catherine S. J.; Nolan, Steven P.; Pieters, Luc; Van de Walle, Davy; Dewettinck, Koen published the article 《Impact of alkalization conditions on the phytochemical content of cocoa powder and the aroma of cocoa drinks》 about this compound( cas:13925-00-3 ) in LWT–Food Science and Technology. Keywords: cocoa powder aroma drink alkalization phytochem content. Let’s learn more about this compound (cas:13925-00-3).
Alkalization is an important process in cocoa powder production that affects color and flavor. In this study, the impact of alkalization temperature (60, 70, 80, 90, 100°C), NaOH concentration (0.59, 1.17, 2.34, 3.59% weight/weight of cocoa powder) and alkalization time (1 and 10 min) on the physicochem. properties (pH, color) and phytochem. profile (theobromine, caffeine, epicatechin, catechin) of cocoa powder were investigated, while the aroma was studied on the corresponding cocoa drinks. High-performance liquid chromatog. coupled to an ultra-violet detector (HPLC-UV) was used for screening the non-volatiles and headspace solid – phase microextraction – gas chromatog. – mass spectrometry (HS-SPME-GC-MS) for the aromatic compounds Major changes of the cocoa properties occurred during the first minute of alkalization. Increase of temperature and alkali concentration generally reduced the levels of epicatechin and the lightness (L*), while the pH of the cocoa powder was affected by changing the alkali concentration On the other hand, the reddish (a*) and yellowish (b*) color component values and theobromine levels were not significantly affected by varying temperature and alkali concentration A higher temperature did not affect the concentration of the volatile compounds, while a decrease in certain chem. classes was observed by increasing the alkali concentration
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