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EN
Zinc is a naturally wide spread element, which generally finds its use in industry but also in numerous pharmaceutical, cosmetic and stomatology materials. Taking into consideration its frequent occurrence (in almost all biological materials) and its low quantities, a good choice of analytical method for zinc assay is a necessity. Apart from spectrophotometric methods – especially AAS (Atomic Absorption Spectrometry) which is a method of choice for zinc determination, also electroanalytical methods are used. Most frequently ASV (Anodic Stripping Voltammetry) or Polarography is applied. Despite the need of samples digestion electrochemical methods offer a price convenient method for determination of zinc, even in trace amounts (ppt – parts per trillion). Currently there is also new information about ion selective electrodes suitable for zinc assay.
EN
The aim of the research paper was to identify the relationship between a chronic cardiac disease and heart transplantation, and the level of patients’ selfcare. The notion of self-care and its levels has been defined, and the circumstances in which it becomes activate specified. Research findings showed that there is no difference in the level of self-care between the group of patients with a chronic heart condition and the group of patients with a heart transplant, and between cardiac patients and healthy individuals. The difference showed in the higher global level of self-care in patients after heart transplantation compared to healthy individuals. The research revealed that a heart transplantation treatment has a direct effect on the scope of self-care in patients. It can therefore be concluded that in the context of changes following a cardiac transplantation, self-care is activated as a buffering mechanism, facilitating a better adaptation of a patient. Yet, it cannot be stated that self-care is a rational mechanism consciously used in order to cope with the situation.
EN
Flexibility is one of the elements – components which support physical fitness and health as well (Howley, Franks, 1997; Bouchard, Shephard, 1994; Skinner, Oja, 1994). The purpose of this paper was to assess the impact of additional flexibility exercises on physical fitness in lower secondary school students, evaluated by means of IPFT (the International Physical Fitness Test). The study was conducted in two experimental groups, where extra flexibility exercises were added to all obligatory PE lessons, and one control group. 1. The decreased standard deviation observed in particular IPFT attempts in the experimental class is the correct tendency showing the favorable influence of flexibility exercises on students’ physical fitness and health. 2. An improvement and considerably better, though statistically insignificant, results were obtained by the students involved in the additional exercises, in all assessed motor skills (strength, speed, endurance and flexibility) and in the scoring reflecting the level of physical fitness. 3. After one year of exercises the control group had worse average results in two attempts – 50 m run (to assess speed) and standing forward bend (to measure flexibility). This trend indicates the importance of flexibility exercises as regards speed and agility.
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