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Do humic substances reduce nitrite toxicity to fish?
VANĚČEK, Miloslav
The aim of this work was to verify the hypothesis that humic substances reduce toxicity of nitrite to fish. Under laboratory conditions, tests of acute toxicity were performed on aquarium fish: zebrafish (Danio rerio) and guppy (Poecilia reticulata). Fish were exposed to nitrite in the presence or absence of humic substance HS 1500. Nitrite was dosed as NaNO2. Preparation Dupla Cur (manufacturer Dohse Aquaristik KG) was a source of the humic substance (HS 1500). The preparation was tested in two different concentrations: 0.5 ml.l-1 and 1 ml.l-1. Toxicity tests were performed according to Czech standard ČSN EN ISO 7346-2. Based on the observed mortality in the acute toxicity tests, 96hLC50 values of sodium nitrite for selected species were calculated in the presence or absence of the tested preparation Dupla Cur. Tests on zebrafish showed a positive effect of Dupla Cur preparation at a concentration of 0.5 ml.l-1 on decreasing of nitrite toxicity. In this case 96hLC50 value was about 73 % higher than the value found in the test where the preparation was omitted. At a concentration of 1 ml.l-1 of the preparation a significantly positive effect was not observed. In the tests on guppy, an effect of Dupla Cur preparation on the toxicity of sodium nitrite was not observed. The tested humic substance does not have the same effect on all fish species. The effect depends on its concentration in the water.
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Primary field data measurement
Kasíková, J. ; Novák, P. ; Nováková, L. ; Michálková, J. ; Vaněček, M. ; Vanerová, Z. ; Semíková, H. ; Zuna, M. ; Skřipko, J. ; Nováková, Lucie ; Plšková, M. ; Vojtěchová, A. ; Sosna, K. ; Kocourek, R. ; Záruba, J.
The report delineates drilling and well logging including acoustic borehole imaging applied in 2011 in the project. Description and interpretation of the data is given subsequently.
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Sequencing and management of the field works
Kasíková, J. ; Novák, P. ; Nováková, L. ; Michálková, J. ; Vaněček, M. ; Vanerová, Z. ; Semíková, H. ; Zuna, M. ; Skřipko, J. ; Nováková, Lucie ; Plšková, M. ; Vojtěchová, A. ; Sosna, K. ; Záruba, J.
Description of the 2011 field works has been given. Drilling and well logging including acoustic borehole imaging were the principal methods. Moreover an interpretation of the attained data has been introduced.
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Satisfaction analysis
Macháček, Petr ; Lorencová, Hana (advisor) ; Vaněček, Michal (referee)
This thesis deals with entry analysis of frame of personnel work in the T-SOFT company which is followed by the evaluation of job satisfaction of its employees concerning separate aspects of work-life e.g. motivation instruments, social relationships on site, system of education or possibility of participating in the system of company's management. Lastly, this thesis provides some recommendations for development of HR processes and their integration into the system of company's management.
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Customer relationship management in outsourcing of IT
Horáček, Jan ; Bruckner, Tomáš (advisor) ; Vaněček, Michal (referee)
Outsourcing of IT is likely to be a perspective model of IT service delivery. However, only a small number of companies have adopted it and according to surveys, their satisfaction is relatively low. On the contrary, customer relation management (CRM) is a marketing approach that still keeps its popularity. Is not therefore CRM a solution also for outsourcing of IT? How should it be applied in the field? This master's thesis is intended for providers of outsourcing of IT and it aims to find answers to the questions above. The first step towards the goal is to identify main characteristic features of outsourcing of IT, which consequently provide a guideline for a systematic approach to the solution. The thesis does not presume reader's familiarity with CRM, hence the second chapter offers a brief yet holistic view of the issue. A synthesis of the information from the first two parts leads to a conclusion that it is not possible to decide about suitability of CRM in outsourcing of IT on a general basis, but always in the particular situation. Therefore the work suggests a set of criteria for the choice. The consecutive chapters deal with the application of CRM. Firstly, an entire system of tools for evaluation of customers is proposed. It enables providers to determine the suitable level of individual approach to each customer with consideration of both business and technical factors. Consequently, a provider can start building a relationship with his customer taking advantage of number of recommendations and tools given by this paper. It includes measures not only for convincing customers but also for increasing their retention. The thesis discusses broad variety of aspects of marketing in outsourcing of IT. Its scope ranges from customer uncertainty mitigation and purchasing process of a corporate customer, over tips on how to manage customer satisfaction, to appropriate adjustments of a service level agreement (SLA). The paper also briefly analyses the specifics of CRM in outsourcing of IT in the public sector.
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