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1

The distribution, species composition and abundance of Enteromorpha spp. in the Gulf of Gdansk

100%
Haroon A. M., Szaniawska A., Plinski M.
Oceanological Studies
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1999
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vol. 28
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issue 1-2
31-39
EN
The variations in distribution, species composition, biomass and water content of Entero-morpha spp. in the Gulf of Gdansk in relation to sampling stations and season are discussed. Only four Entero-morpha species were identified in the samples collected, the most frequent being E. intestinalis (L.) Link. The species composition was found to vary in relation to sampling stations and seasons. The abundance of Enteromorpha spp. varied at different stations with a maximum at Puck variations in biomass were observed. Although Enteromorpha spp. were characterised by a high water content (96.56?0.40% of WW), no statistically significant variations in the water contents of these species with respect to sampling stations could be detected. Although there was a tendency towards seasonal changes, these occurred within a narrow range.
2

Selected issues of non-conventional enzymology Part I. ? Characterization of enzymatic processes carried out in a medium with subcritically low water content

100%
Antczak T., Szczesna-Antczak M.
Biotechnologia
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2003
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issue 3
124-138
EN
Enzymology of non-aqueous media, also termed a non-conventional enzymology, is a discipline focused on chemical reactions catalysed by enzymes in the media other than water. However, such environments always contain certain amount of water, either dissolved in a solvent or enzyme-bound. The latter fraction of water is called an essential one, and it is crucial for the non-aqueous enzymology, since it stabilises the conformation of protein molecule and determines its enzymatic activity. The paper presents structure, function, and methods of assays of the enzyme-bound water together with other water forms that can also be found in reaction milieu. The methods of regulation of enzymatic activity in non-aqueous media by using compounds capable of associating with polar atoms of amino acid residues involved in catalysis, and thus positively influencing activity of enzymes, have also been discussed. The factors giving rise to a decrease in catalytic activity of enzymes under non-aqueous conditions, and methods of prevention against this phenomenon have also been analysed.
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