Analysis of physicochemical properties of wines available on the polish market

W pracy omówiono wina gronowe, ze szczególnym uwzględnieniem ich właściwości prozdrowotnych. Zaprezentowano wyniki badań laboratoryjnych, określające ekstrakt ogólny, kwasowość ogólną oraz zawartość antocyjanów, a także autorską kartę oceny organoleptycznej sześciu półsłodkich, czerwonych win, różniących się po-chodzeniem. Wyniki badań zaprezentowano na wykresach, do których dołączono krótki opis. W odniesieniu do ogólnej pożądalności wykazano różnice pomiędzy poszczególnymi próbami (W1-W6). Poddane ocenie wina charakteryzowały się również odmiennym składem fizykochemicznym.The thesis discusses grape wines, with particular emphasis on their pro-health properties. Laboratory results were presented the total extract, total acidity and anthocyanin content, as well as the author’s organoleptic evaluation card of six semi-sweet red wines of different origins. Test results are presented in diagrams, which are accompanied by a short description. With respect to overall desirability, differences between individual samples were shown. The wines under evaluation were also characterized by a different physicochemical composition

Changes in the quality characteristics of raspberry fruit due to mechanical vibrations and storage conditions

The paper presents the results of a study investigating a mechanical impact, in the form of vibrations, on the overall quality of raspberry fruits after harvest, in view of the conditions of their transport to the consumer and the processing plant. The degree of compaction of the raspberry fruit layer was determined during a test carried out under laboratory conditions, and the amount of juice leakage, resulting from the vibrations to which the raspberries were subjected, was measured. It was demonstrated that the quantity (mass) of juice leakage was considerably affected by the mechanical impact, in the form of vibrations, exerted on a layer of raspberry fruits. The leakage was smaller in cooled fruits, and significantly greater in fruits that were not subjected to cooling immediately after harvest, and were stored under ambient conditions