The combination of high-performance thin-layer chromatography (HPTLC) with image analysis (IA) and chemometrics becomes an attractive tool for natural extracts investigations. The large variability of these samples requires powerful image acquisition devices, multivariate image processing techniques and advanced chemometric methods to facilitate the interpretation of the chromatographic data. In the current study, two image acquisition devices and different image processing procedures were investigated using the HPTLC chromatograms of hydroalcoholic extracts of Gallium verum. Different sets of chromatographic data were generated for both UV chromatograms (obtained at 254 nm and at 366 nm) using images acquired with a digital camera and an UV-Vis TLC scanner. In all cases the Principal Component Analysis (PCA) technique was used in order to extract the information from chromatographic profiles. Variables of gray and pure colour red, green and blue intensities of pixels from start to front were used as input data in all cases. The results obtained by PCA investigations of HPTLC data from UV chromatograms at 254 nm and 366 nm respectively, provided complementary information related to the characteristics of the investigated extracts. Moreover, important steps as appropriate color scale selection and image processing/analysis procedures were pointed out based on the obtained results.
Stress is one of the most common side-effects of the educational process, especially in learning, teaching and evaluation. Without proper coping strategies, all those involved in education (pupils, teachers, parents, leaders) might experience burn-out syndrome, anxiety and avoiding behavior.This article reflects on the significant positive effects of introducing fractals images in workspaces. The purpose of this paper is to explore whether fractals can reduce stress, increase openness to experience and raise tolerance to frustration and angst.Fractals are computer generated shapes with the help of a mathematical formula that describes the complex look of geometrical natural things like clouds, trees, ferns, blood vessels, muscle tissues. Even the human brain has a fractal dimension. These shapes can be broken into an infinite number of pieces and still be self-similar with the whole, no matter what scale. Actually, fractals are the mathematics behind nature and behind all dynamic non-linear systems (human behavior, learning, weather and economics)Scientist and human know that being exposed to natural environments can have an effect in reducing psychological and physiological stress. This raises the question if fractals are responsible for this and if they can offer the same benefits.It is important to focus on the possible positive effects of fractals because they can be a useful, cheap and easy way to improve the educational workspaces in such a manner that can reduce stress and increase wellbeing without any effort. Keywords: fractals; psychological stress; healthy education; education workspace; environmental stressors
Introduction: Recommended by the World Health Organization as the optimal way of infant feeding, maternal breast milk represents the best nourishment for the newborn baby during its first six months. The purpose of this study was to evaluate some of the Romanian mothers’ characteristics that can influence their attitude towards breastfeeding and food diversification. Methods: A questionnaire about 32 questions, including demographics items and breastfeeding attitudes, was sent online (socializing platforms) in 2020 to mothers from all Romania districts. Our sample included at the end 1768 subjects, who fully completed the questionnaire. Statistical analysis was carried out using the GraphPad statistical software. Results: The prevalence of breastfeeding for more than six months was only 32.18% in our group, and most of them were educated mothers who lives in urban areas (OR=2.76), were married (OR=1.98), had over 30 years old (OR=1.43) and have more than one child (OR=1.74). Conclusions: We underline the importance of tackling in our future community interventions some of the socio-demographic characteristics of pregnant women (like groups education, good and accessible information about breastfeeding, young age, first pregnancy, or mothers from rural areas as well) in developing good habits of breastfeeding or complementary feeding, in order to improve their children health status and proper development.
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