MOTIVATIONAL COMPONENT OF PEDAGOGICAL SKILLS’ DEVELOPMENT OF FUTURE TEACHERS OF LABOR EDUCATION AND TECHNOLOGIES

Relevance. The future teachers’ motivation problem and value orientations as basic characteristics of readiness for the pedagogical skills development is one of the key issues in the conditions of professional training in higher education institutions.Objective: The article's aim is to substantiate in a theoretical way and experimental investigation the reasons, to disclose the set of values orientation of future teachers of labour education and technologies as development factors of their pedagogical skills.Methods: theoretical: analysis of current psychological and pedagogical research on the development difficulties of pedagogical skills; generalization and systematization of approaches to the study of personal motivation and values; empiric: questionnaire according to the M. Rokych’s method "Value Orientations", correlation of ranking results with A. Maslow's pyramid of values and needs; methods of mathematical statistics.Results: Results: The essence of the "pedagogical skills" concept has been clarified. Based on the analysis of academic sources, the content of such categories as motives, motivation, values, and value orientations has been specified. The research method of the features of the motivational and value sphere for future teachers of labour education and technologies have been described. A qualitative and quantitative analysis of the distribution of value orientations of future teachers of labour education and technologies have been represented.Conclusions: Founded on the study results, the priority groups of motives and values that are leading for those seeking education at this day stage of social evolution are identified, that is safety and comfort, health, interesting work, freedom and independence, productive life, development, and communication.

Effect of foliar treatment with chitosan on phenolic composition of ῾Fetească neagră’ grapes and wines

The objective of this study was to determine the influence of chitosan treatments, applied in vineyard for plan protection, on the phenolic quality of grapes. The study was conducted for two consecutive years (2020-2021) in the wine center of Murfatlar, Romania, on ‘Fetească neagră’, an ancient but well-known indigenous Romanian grape variety for red wines. Chitosan is meant to offer an alternative for the classic treatment with Bordeaux mixture (BM), which represented the control variant. A combination treatment with half dose of chitosan and half dose of BM was also applied and evaluated.  Chemical composition at harvest time was evaluated by measuring the content of sugar, total acidity, pH, total anthocyanin potential (ApH1), anthocyanins extractable at wine pH (ApH3.2), total polyphenol index, skin tannins, seed tannins and seeds maturity. In wines the colour parameters were determined by spectrophotometry and individual phenolic compounds by UHPLC-HRMS. In grapes, accumulation of anthocyanins increased with the total dose of chitosan applied in the vineyard, with higher values in 2020 when temperatures were higher and the rainfall values were typical for the region. Accumulation of tannins in grape skins followed a similar trend. In wine, chitosan determined a significant 72% increase in colour intensity in 2020. Among the individual phenols gallic acid was predominant, with higher values in the rainier year (2021) and significant increases determined by chitosan treatment (especially in 2021 when it increased by 97% as compared to BM treatment). Catechin and epicatechin recorded important increases in the less favourable year (2021), with confirmed increases in both years elicited by the chitosan. Quercetin and myricetin were not influenced by the chitosan treatment, but their increase was correlated with higher temperatures and inversely correlated to the amount of rainfall. Trans-resveratrol ranged between 4.3-8.0 mg L-1 in 2020 and 5.0-6.5 mg L-1 in 2021, with an important increase determined by the chitosan treatment in 2020 (89% increase compared to BM treatment)

Modern Methods for Identification of Synthetic Dyes used in Counterfeit Wines

This paper presents partial results obtained in Sectoral Plan Project 314/2006, funded by Agricultural Ministry- MARD. The quantitative method HPLC (High Perfomance Liqhid Chromatography), is powerful and fast. Because of its resolution, sensitivity and accuracy, in recent years has become the preferred method for quantitative analysis of synthetic dyes in wines. For testing the efficiency of this method used in identifying artificial dyes were used contaminated tipical wine samples from the research zones with the most known artificial colorings used in couterfeit wine. At ICSI Rm Vâlcea HPLC method was adapted for simultaneous determination of five synthetic food dyes: Azorubin, Amaranth, Ponceau 4R, Red Allure AC, Erythrosin, which can be used to detect synthetic additives in red wines in order to correct color deficiencies and to achieve red wines from white wines. The figure below is reproduced chromatogram from a sample of Italian Riesling from SCDVV Murfatlar contaminated with dye red-allure AC