|
|
Vesnice jako komunita. Případová studie Rovečného
Melezínková, Petra
This bachelor thesis aims to characterize the village Rovečné and scrutinize it´s structure in terms of the relations the between members of the community. The location of the village, it´s equipment and historical and demographical development are all discribed. A survey was carried out in the village and several significant residents partiking in the govenance of the village were interviewed. The thesis focuses on the relations in the community and the interrelations of it´s segments that are defined basen on age, hobbies, and the way the people spend their leisure time. Stability in certain areas of the lives of the residents is also explored. The goal is to predict, record and analyze individual aspects of human behaviour within the community. In the concluding part of the thesis, the village is characterized and the community and the relations within it are discussed. Also included is the topic of a small-community family and it´s togetherness. A possible future development of this kind of family is estimated. The results show that Rovečné is a functioning community consisting of microcommunities defined by housing, hobbies and leisure time preferences. Newcomers and visitors do not disrupt the relations within the village and are thus not excluded by the natives from the life in the village. According to the carried out research, the village is a friendly and cohesive community.
|
|
|
Testy toxicity s perloočkou Daphnia magna
Melezínková, Petra
The aim of this thesis was to derermine the values of toxic effect of chemical sub-stance chemical on the tested organism Daphnia magna. For testing, these materials were selected: polyaluminiumchloride (PAX 18), its aqueous solution (PAX 19) and potassium dichromate. The thesis is divided into two parts, in the first half I devote to theory of the basic terminology of the issue and the general characterization of the tested organism. In the practical part I focus on the characteristics of the used substances, the course of the tes-ting and the results of the work together with the discussion. Experimental concentrations for PAX 18 were between 1-100 mg.l-1, for PAX 19 10-300 mg.l-1 and for potassium dichromate 40-150 mg.l-1. Testing was perfomed in 3 repeatings with ten individuals + control. 24hEC50 values were: for PAX 18 45,06 mg.l-1, for PAX 19 97,82 mg.l-1 and for potassium dichromate 1,569 mg.l-1. The values of 48hEC50 for PAX 18 byly 22,62 mg.l-1, for PAX 19 37,20 mg.l-1 and for potassium dichromate 0,864 mg.l-1. In all tests, fluctuations in pH and dissolved oxygen content, as well as the number of inhibited individuals, were observed. The results of the observations were plotted and then commented verbally.
|
guest ::
RSS feed.