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Abstract

The aim of this study was to examine the possibility of use of synchronous culture of Chlorella vulgaris algae as a biotest in water quality control. In the experiment the samples of water collected from seven sampling points in Goczałkowice Reservoir were used. The criterion of changes was the concentration of photosynthetic pigments, from 24'" hour of the cell life cycle, separated by HPLC technique. On the basis of changes taking place in the cells of the algae cultures it was possible to establish the timing of the flood period and autumnal changes in a water quality. It was also proved that the water quality in the main water current that fall into the western part of reservoir carried by the Wisła River after the flood period significantly differed from the water quality in the other parts of the reservoir, particularly in its eastern section.
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Authors and Affiliations

Anna Czaplicka-Kotas
Joanna Lodowska
Adam Wilczok
Zbigniew Ślusarczyk
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Abstract

The purpose of this article is to show the contribution of fi lm in shaping of social imagination of Katyń crime in Poles’ minds. Author places described fi lms in the background of today’s knowledge.
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Authors and Affiliations

Tadeusz Lubelski
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Abstract

This article describes comprehensive conservation works and examinations carried out on the late-Gothic painting “Annunciation to the Blessed Virgin Mary” from the Kórnik Library of PAN [the Polish Academy of Arts and Sciences] from 2013 until 2014. The painting underwent conservation several times in the 19th and 20th centuries. A detailed analysis of the state of preservation of the work, determination of the causes of its damage, and the chemical composition of the particular technological layers with the help of such examination methods as laboratory analyses of the pigments and binders, and UV and IR analysis of the painting, made it possible for the researchers to identify and remove all the secondary layers and to restore the work in such a way as to recover its original aesthetic value and technological properties.

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Authors and Affiliations

Piotr Dybalski

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