Ermolaeva Spravochnik Rabotnika Laboratorii Pivovarennogo Predpriyatiya
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• 45 Downloads Abstract Changes were studied that occurred during storage in the grain of the spring two-row barley of Get’man and Priazovskii 9 breeds permitted to use in the North Caucasian region and their influence on the malt quality. It is shown that the value of the germination indices within the time of the grain storage increases achieving maximum in 9 months. The germination index of Get’man breed was higher than in Priazovskii 9 breed. Both breeds had low water sensitivity within the whole storage period. In the malt obtained from the grain stored for more than 6 months, the content of protein reduced. It is stated that the indices of the barley grain during storage at the ambient temperature within the year changed constantly. Furthermore, the properties of the grain of different breeds changed differently, which favorably influenced the malt quality.
Title of article BEER QUALITY ASSURANCE BY CONTROLLING WORT POLYPHENOLIC CONTENT WITH ADSORPTION METHOD Authors Krasnova T.A., Kemerovo Institute of Food Science and Technology (University), Stroiteley blvd. 47, Kemerovo, 650056 Russian Federation, Gora N.V., Kemerovo Institute of Food Science and Technology (University), Stroiteley blvd. 47, Kemerovo, 650056 Russian Federation Golubeva N.S., Kemerovo Institute of Food Science and Technology (University), Stroiteley blvd. 47, Kemerovo, 650056 Russian Federation Section: FOOD PRODUCTION TECHNOLOGY Year 2016 Issue 1 DOI 10.-4057-2016-1-36-43 Annotation This research explores feasibility of adsorption method used for regulating polypenols content in wort with a view of improving beer quality.
It examines adsorption of polyphenols (quercetin, gallic acid, rutin) from pure substance solutions, their mixtures and beer wort treated by sorbents that differ by origin, making, structure and surface chemical composition. The work determines patterns and specific features of polyphenols adsorption with activated carbons. To describe adsorption mechanism more precisely, we specified structure, surface chemical condition, and calculated adsorption parameters using equations of Langmuir, Freundlich and Dubinin-Radushkevich, and the multilayer adsorption theory (BET model). It is demonstrated that polyphenols adsorption mechanism depends on carbon characteristics and is of physical nature that reveals itself in dispersion interaction in micropores and in specific one with oxygen-containing functional group (OFG) on carbon surface.
Polyphenol competitive adsorption in mixture and wort recognized. At polyphenols adsorption from model solutions and wort, carbon sorbents are identified to share sufficiently close sorption characteristics. We performed comparative evaluation of quality characteristics of beer produced from activated carbons treated and untreated worts. It is shown that beer samples produced from unhopped wort filtered through semi-coke adsorption, meet regulatory standards requirements of safety by organoleptic, physical and chemical indicators. Moreover, beer obtained from semi-coke treated wort exceeds control sample in terms of organoleptic and stability ensuring indicators. Keywords gallic acid, rutin, quercetin, wort, carbon sorbents, adsorption Artice information Received March 3, 2016 Accepted May 2, 2016 Available online June 27, 2016 Imprint article Krasnova T.A., Gora N.V., Golubeva N.S.
Beer quality assurance by controlling wort polyphenolic content with adsorption method. Food and Raw Materials, 2016, vol. Doi: 10.-4057-2016-1-36-43 Bibliography • www.baltika.ru (accessed 15 February 2016). (In Russian). • Khorunzhina S.I.
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