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Aim The aim of this paper is the assessment of eating habits of high school students from grades 2 and 3, including eating habits, self-evaluation of diet and the most common nutrition mistakes committed by the members of the studied group. Materials and methodology The study involved 333 high school students between the age of 17 and 19. The group consisted of 150 girls and 183 boys. Data was collected using an original survey which consisted of questions dealing with diet and respondent’s particulars. The study was anonymous. The results have been subjected to statistical analysis using Pearson’s chi-squared test. The statistical differences recognized as significant were those with probability of p<0.05 Results The majority reaching nearly 40% of respondents declared that they eat 4 meals a day. Over 60% eat breakfast every day. The number of students who declared that they do not eat breakfast at all amounted to 48. Over 55% do not pay attention to their eating habits, whereas 45 students consider them unhealthy. About 60% of respondents declare that they do not drink energy drinks. Within the group of students who consume such drinks the most often declared frequency was 1-2 times a week. The answers, however, vary between the female and the male group (chi-square=82.72121, p≤0,05); 75% of males do not consume energy drinks, among females the percentage amounts to mere 43%. Conclusions The students taking part in the study commit nutrition mistakes which might be a sign of unsufficient level of health education within that field. The nutritional education of the youth should start in primary school and be adapted to the needs and possibilities of the target group. In the face of poor diet, it seems justified to analyze the sources of information on nutrition used by the youth in terms of their credibility.
Cornus mas L., C. officinalis Sieb. et Zucc. and their putative interspecific hybrid specimens were examined in order to describe their morphological, anatomical and genetic differentiation. Petiole length, number of leaf veins, pedicel and bract length, stone size, thickness of pericarp layers, the size and number of locules and the number of cavities were measured. Pedicels and bracts were shown to be significantly longer for C. mas (7.22 and 6.95 mm) and for the putative hybrid (9.11 and 6.61 mm) than for C. officinalis (6.86 and 5.81 mm, respectively). Average values of stone width and thickness, exocarp and mesocarp thickness, the number of cavities in the endocarp obtained for the putative hybrid differed significantly in comparison to C. mas and were similar to C. officinalis. Genotypes of the examined species were evaluated for genetic relationships using random amplified polymorphic DNA (RAPD) markers. Initial screening of the bulks of C. mas and C. officinalis compared with their putative hybrid using 72 decamer random primers resulted in the identification of 24 primers differentiating both species and their putative hybrid and showing reliable polymorphisms. Among a total of 485 amplified fragments, 89.7% were polymorphic, 18.8% were specific to C. mas individuals, and 18.6% were specific to the individuals of C. officinalis. In obtained profiles of the examined hybrid individual specific products absent in the genotypes of both parents were observed. The phylogenetic tree revealed two separate clusters including C. mas and C. officinalis accessions, respectively. The biggest genetic distance was observed for hybrid specimens, although the hybrid belonged to the C. mas cluster.
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