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Although the statutory minimum wage is not a new category, in the Czech Republic we encounter the definition and regulation of a minimum wage for the first time in the 1990 amendment to Act No. 65/1965 Coll., the Labour Code. The specific amount of the minimum wage and the conditions of its operation were then subsequently determined by government regulation in February 1991. Since that time, the value of minimum wage has been adjusted fifteenth times (the last increase was in January 2007).
The aim of this article is to present selected results of two researches of acceptance of the statutory minimum wage by Czech enterprises. The first research makes use of the data collected by questionnaire research in 83 small and medium-sized enterprises in the South Moravia Region in 2005, the second one the data of 116 enterprises in the entire Czech Republic (in 2007). The data have been processed by means of the standard methods of descriptive statistics and of the appropriate methods of the statistical analyses (Spearman correlation coefficient of sequential correlation, Kendall coefficient, χ² - independence test, Kruskal-Wallis test, and others).

The paper presents results of research aimed at the examination of connections between selected personality characteristics and the duration of unemployment in examined people. Our assumption that the duration of unemployment decreases with better education was confirmed. On the other hand, it is also age that plays an important part in finding a new job. The more advanced the age the longer the duration of unemployment. Groups of older individuals were more frequently unemployed for long time. The value of the personality characteristic - perseverance in the Sense of coherence concept prominently decreases with the prolonged unemployment. A conspicuous decrease in the Sense of coherence value - dimension of manageability occurs after one year of unemployment. This prominent decrease is caused namely by results recorded in the group of females.
The number of people composing the social support decreases with the duration of unemployment and with the increasing age, in males particularly. The negative impact of social support on the reintroduction of unemployed people into labour process is mitigated by possible distinctive and firm action orientation and Sense of coherence (namely the dimension of manageability).

Woody debris is an inseparable part of natural river channels. In a river ecosystem it affects the hydraulic, hydrological and morphological properties of the channel, and it is also of a biological significance. However, besides the positive effects, the woody debris can also have a negative impact, e.g. the reduction of the flow profile capacity or the destruction of waterside buildings. With the development of log floating and timber trade, the woody debris started to be removed from the channels. Currently, within the process of stream revitalization, woody debris is being artificially placed into rivers. This paper deals with the possible dendrochronological dating of large woody debris (LWD) and wood jams in the river channel and the riparian zone. Two sites have been chosen for the research, the Morávka River and the Černá Opava River. These sites have been chosen because of two different types of riparian stands. The banks of the Morávka River are a soft wood floodplain forest (350 m ASL); the Černá Opava River has stands with nearly a hundred percent proportion of spruce (600 m ASL). The results of the research show that the species with diffuse-porous wood structure are very hard to date on the basis of Pressler borer cores. On the other hand, the sites with softwood species are easily datable, especially if the trunks contain more than 40 tree-rings. At these sites it is possible to use the dendrochronological dating for the establishment of the temporal dynamics of the woody debris input in the river ecosystem.

In our research were evaluated sixteen varieties of vegetable pepper in technical ripe and twenty-eight tomato varieties in content of vitamin C in mg.kg^-1. The experimental works were made on the open field and in the laboratories of the Research Institute of Vegetables in Nové Zámky, Slovak Republic. The trials have been made in years 2005, 2006 and 2007.
The average vitamin C content of fruits in the technical maturity of all sixteen pepper varieties evaluated in 2005 was 1 813.06 mg.kg^-1. In the year of 2006, the average content of vitamin C was 1 909.43 mg.kg^-1 and in the third experimental year 2 392.49 mg.kg^-1. When analyzing the variance of vitamin C, varieties are the sources of the significant variability (F = 2.08). Years as factors of variability are highly significant different (F = 28.78).
The mean vitamin C content in tomato fruits in the year 2005 was 317.63 mg.kg^-1, in 2006 the mean value of vitamin C was 345.09 mg.kg^-1 and in 2007 the average content was 316.14 mg.kg^-1. The tomato varieties and years were the source of the variability factors and highly significant different (F = 6.85, F = 16.27) by the Fisher test.