Microsoft Word - Acta_TA_10_1__2011
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چکیده
Background. Amount of monoterpene alcohol and their glycoside precursors in grapes is determined by the type of grapes, and the availability of specific hydrolytic enzymes during the manufacturing process. Addition of these enzymes, hydrolysing β-glycosidic bond, to the grape can be used to increase the potential of aromatic raw material, releasing odoriferous aglycons from non-volatile glycosides and in consequence to enhance the flavour of white wines. In this study complex enzyme preparations AR2000 and Rapidase X-Press were used as a supplement to the musts. Material and methods. Two white grape varieties (Nachodka and Perła Zali) grown in Golesz vineyard in Jasło were used for winemaking. Aglycone analysis was conducted on the basis of fast acid hydrolysis and solid phase extraction (SPE-C18) with subsequent GC-MS analysis. Wines treated with enzymes and without enzyme treatment were prepared. Dominating terpenes (linalool, nerol, geraniol, β-citronelol, α-terpineol) were quantified in this study. Results. Amount of free terpenes was comparable in musts of both varieties (42.7 μg/L for Perła Zali, 46.3 μg/L for Nachodka), however Nachodka had 228.9 μg/L of bound terpenes, compared to 88.8 μg/L in Perła Zali. Addition of glycosidases to musts resulted in an approximately 50 μg/L increase in investigated monoterpenes in Perła Zali and appr. 100 μg/L in Nachodka. Total amount of monoterpenes decreased after 6 months storage, however their levels in enzyme treated wines were significantly higher than in control samples. Enzyme treated wines were evaluated by sensory panel and perceived different from control samples with more pronounced selected notes mainly fruity and floral. Conclusion. Addition of enzymes can be used to improve the flavour of white wines produced from the average quality of raw material, influencing the increase in aromatic
منابع مشابه
Microsoft Word - Acta_TA_10_1__2011
Corresponding author – Adres do korespondencji: Dr hab. inż. Stanisław Błażejak, Department of Food Biotechnology and Microbiology of Warsaw University of Life Sciences, Nowoursynowska 159 C (build. 32), 02-787 Warsaw, Poland, e-mail: [email protected] APPLICATION OF IMMOBILIZED CELL PREPARATION OBTAINED FROM BIOMASS OF GLUCONACETOBACTER XYLINUS BACTERIA IN BIOTRANSFORMATION OF GLYCERO...
متن کاملMicrosoft Word - Acta_TA_10_1__2011
Corresponding author – Adres do korespondencji: Dr inż. Zuzanna Goluch-Koniuszy, Department of Human Nutrition Physiology of Western Pomeranian University of Technology in Szczecin, Papieża Pawła VI/3, 71-451 Szczecin, Poland, e-mail: [email protected] APPRECIATION OF CONCENTRATION OF LIPOPROTEINS AND APOLIPOPROTEINS IN SERUM OF MALE RATS UNDER THE INFLUENCE OF DIET CHANGE COMP...
متن کاملMicrosoft Word - Acta_TA_10_1__2011
Background. The use of plant origin polyphenols as food ingredients, supplements or antioxidants is very promising as a future trend for human health and food stability. Free radical activity, responsible for human ageing and food deterioration could be delayed by the use of antioxidants present in fruit and vegetables. The aim of the present research was to evaluate and compare the antiradical...
متن کاملMicrosoft Word - Acta_TA_10_1__2011
Background. Phenolic acids were repeatedly pointed out as powerful antioxidants. The studies in the past prove the differences in the phenolic acids content in malts and worts. In this work, the influence of wort boiling and whirlpool separation on the phenolic acid content was studied. Material and methods. Worts were produced in the local brewery by the infusion method using pale pilsner-type...
متن کاملMicrosoft Word - Acta_TA_10_1__2011
Background. The aim of the study was to observe the effects of a modified diet, in which whole grains of cereals had been isocalorically substituted with wheat flour (type “500”) and saccharose, and supplementation with B-group vitamins, on selected calcium metabolism parameters in female rats. Material and methods. The experiment was carried out on 36 female rats aged 6 months. Animals were fe...
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تاریخ انتشار 2010