Evaluation of microbial, physicochemical parameters and flavor of blueberry juice after microchip-pulsed electric field was written by Zhu, Ning;Zhu, Yue;Yu, Ning;Wei, Yulong;Zhang, Jiaying;Hou, Yanan;Sun, Ai-dong. And the article was included in Food Chemistry in 2019.Formula: C6H12O2 This article mentions the following:
The effect of microchip-pulsed elec. field (MPEF) and high temperature short time sterilization (HTST) technologies on microbiol., physicochem. properties and flavor of freshly squeezed blueberry juice were compared. Under the MPEF treatment at 350 V, total plate count, total yeast and molds were completely inactivated, meanwhile, Vitamin C, anthocyanin, total phenols, titratable acid and color had no significantly changes. During storage of 30 days at 4 °C, Vitamin C decreased by 11.52% and 26.78% after MPEF and HTST treatments, all treated juices showed to be microbiol. safe, whereas MPEF can protect nutritionally related properties and color of blueberry juice samples more efficiently. Besides, relatively small changes of juice in odor, taste and volatile compounds concentration was observed by MPEF treatment. Hence, application of MPEF may be an ideal alternative treatment to HTST processing in order to ensure longer shelf life, higher functional and nutritional values of blueberry juice. In the experiment, the researchers used many compounds, for example, Methyl2-methylbutyrate (cas: 868-57-5Formula: C6H12O2).
Methyl2-methylbutyrate (cas: 868-57-5) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Formula: C6H12O2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics