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2006
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tom Vol. 80, nr 2
205-226
EN
The review presents a concise discussion of reports on hydrogenation of N-containing heteroaromatic compounds in relation to the hydrodenitrogenation process (HDN), along with hydrogenation mechanisms of the most representative examples of the compounds studied. The influence of electronic properties of aromatic structures, with the special emphasis on the resonance stabilization energies and the interatomic C-C and C-N distances, on the susceptibility for their hydrogenation has been considered. The importance of an initial mode of substrate coordination in relation to the reaction products formed is underlined.
EN
Satisfaction, engagement and organisational commitment of employees are undoubtedly crucial elements when developing an effective organisation. The ambiguity of these concepts and the multiplicity of definitions hinder the analysis of the available studies. In this article, the author attempts to review the available concepts of these phenomena, indicates the relations between them as well as presents an original research model as a proposal for a starting point for further research.
EN
Cultural identity of the inhabitants of New Caledonia is at the stage of deeper and deeper absorption of Western culture patterns, while striving at the same time to preserve traditional cultural learning that is based on mythical thinking. Traditional perception of the world, and the resulting types of activities, gives way to modern professions connected with tourism services and the use of advanced technologies.
PL
Pomiary wielkości emisji pyłu regulują trzy podstawowe akty prawne i kilkadziesiąt aktów niższej rangi. Przebijanie się przez setki przepisów nie jest zadaniem łatwym, dlatego w artykule dajemy ich przegląd, co osobom zajmującym się pomiarami emisji pyłów być może ułatwi orientację w tym prawnym gąszczu.
EN
This paper presents the results of the studies of metal content in precipitation water in 2013, recorded at measuring points within Lubelskie and Lubuskie Voivodeships. It provides a detailed description of the method of collecting and analysing water samples in respect of light- and heavy-metal determination. Based on the results, a general assessment was made of the condition of the environment in the areas in question. Also, the sources of pollution in wet precipitation, and the effects of their introduction into the environment, were determined. It was found that the main pollution elements of precipitation water were linked to anthropogenic sources. The study also established that precipitation water, especially in the sparsely industrialised Włodawa region in the Lubelskie Voivodeship, had generally low pollution levels. It was also noted that in 2013, due to low total precipitation, the environmental impact of metal content was lower than in the preceding years.
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