IOP Conference Series: Earth and Environmental Science PAPER • OPEN ACCESS Study of physic-chemical and biochemical parameters of technical varieties of grapes To cite this article: S N Cherviak et al 2021 IOP Conf. Ser.: Earth Environ. Sci. 659 012087 View the article online for updates and enhancements. This content was downloaded from IP address 170.106.34.90 on 24/09/2021 at 23:33 ESCGAP 2020 IOP Publishing IOP Conf. Series: Earth and Environmental Science 659 (2021) 012087 doi:10.1088/1755-1315/659/1/012087 Study of physic-chemical and biochemical parameters of technical varieties of grapes S N Cherviak, N S Anikina, N V Gnilomedova, V G Gerzhikova and A V Vesiutova Laboratory of Chemistry and Biochemistry of Wine, Russian national research institute viticulture and winemaking “Magarach”, Yalta, Russia E-mail:
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[email protected] Abstract. The authors studied introduced (Aligote, Rkatsiteli, White Muscat, Riesling Rhine), indigenous (Kokur white, Sabbat) and classified varieties of grapes of Magarach Institute (first- born Magarach, Citron Magaracha, Muscat aligote), growing in Crimea, according to physicochemical and biochemical indicators. The feature of grape aromatic varieties is the high content of phenolic substances in the must (404–640 mg/l), the activity of monophenol- monooxygenase, macerating ability. Indigenous grape varieties are characterized by a low content of titratable acids. The activity of monophenol-monooxygenase is interconnected with the content of phenolic substances in the must (r = 0.77). The ratio of tartaric and malic acids increases in the series introduced → indigenous → classified varieties.