https://repository.utm.md/handle/5014/8302 2026-05-07T07:34:10Z https://repository.utm.md/handle/5014/36077 The Quality of Grapes of the Moldova Variety According to the Foliar Fertilization System in the Phenophase of the Berry Growth PROCOPENCO, Valeria The fertilization of the vineyards is an important and sometimes decisive technological process in the production technology of table grapes. Knowing the nutritional needs of the grapevine in different phenophases ensures obtaining homogeneous, quantitative and qualitative harvests, but also increases the plants' resistance to adverse environmental conditions. The aim consists in the analysis of the quality indices of the Moldova table grape variety, following the application of Ca treatments, in the phenophase of berry growth. In the research, different variants of application of treatments with Ca (Calcinite) were studied, with 1-4 treatments, in different periods. Observations, measurements and determinations were carried out in the field, as well as chemical laboratory analyzes according to the methods approved in viticulture. The growth of the berries on the vine begins a few days after flowering and lasts until the grapes enter the field. Following the study, a positive influence of calcium treatments on grain firmness was observed in the variants with the highest number of foliar applications. The use of individual or combined calcium fertilization of the Moldova variety in the production conditions with 1-4 post-fertilization treatments, depending on the conditions of the year, positively influenced the quality of the harvest. 2024-01-01T00:00:00Z https://repository.utm.md/handle/5014/36069 Determination of tetracycline residues in honey BURLACU, Svetlana Antibiotics from the tetracycline group are widely used for prevention and control of infectious diseases and have a great activity against variety of Gram-positive and Gram-negative bacteria. Due to the widespread use of tetracyclins in animal husbandry, it can lead to an increase the risk of antibiotics remaining in human food. In this study, the degree of contamination of honey from the markets with antibiotics from the tetracycline group was examined. Antibiotics from the tetracycline group: Tetracyclin, Oxitetracyclin and Chlortetracyclin were examined by competitive enzyme immunoassay method for the quantitative analysis using the kits R-biopharm, Biopanda Reagen oxitetracyclin and chlortetracyclin. The principle of the method is to identify the unknown amount of antibiotic by present in the sample and the fixed amount of antibiotic antigens pre-coated on the wells of microtiter strips compete for the antiantibiotics antibodies, which in turn is detected with enzyme conjugate. After incubation the wells are washed and the bound enzyme is visualised by adding TMB solution. Any coloured product is measured at 450 nm after adding stop solution. The absorbance value of the developed colour is inversely proportional to the amount of the antibiotics in the sample. The quantity of antibiotics in the test sample can be interpolated from the standard curve constructed from the standards, and corrected for sample dilution. 2022-01-01T00:00:00Z https://repository.utm.md/handle/5014/36068 The effects of various organic acids on grow performance and gut microbiota of broiler chickens MALANCEA, Nicolae The aim of this study was to evaluate the influence of organic acids, administered through the drinking water, on growth performance and controlling bacterial infections of broiler chickens as an alternative for antibiotics. 2022-01-01T00:00:00Z https://repository.utm.md/handle/5014/36067 The age of farrow in piglets and its effect on the comparative characteristics of hematological, biochemical indices and average daily growth MILEȘCO, Vladislav; STICI, Valentina Piglets are weaned gradually, on the first day of weaning the piglets are only allowed to suckle 5 times, on the 2nd day 4 times, on the 3rd day 3 times and on the 4th day 2 times, and in 5th and 6th days only once. On the 6th day after weaning, the sows are removed from the pens and moved to another place, the weaned piglets being left in the pen where they grew for a few days. If the piglets are taken out of the pen on the same day as the sow, they become very agitated, often losing their appetite, with corresponding negative consequences. For efficiency in breeding sows, piglets at 21-28 days or even younger are also often weaned. The study of hematological and biochemical blood indices showed an increase in the amount of erythrocytes. The average daily gain was higher in piglets that were kept in smaller numbers in pens. The participation of the Great White, Durok and Landrace breeds in the given complex plays a very important role in fattening. No abnormalities, illnesses or deaths were reported. 2022-01-01T00:00:00Z