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Evaluation of the enzymatic activity of selected bacterial strains

100%
Wierzba S., Latała A.
Polish Journal of Chemical Technology
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2007
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vol. 9
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issue 2
68-72
EN
In these studies we attempted to evaluate the lipolytic, proteolytic and cellulolytic activity of bacterial strains isolated from water and the bottom sediments of Turawa Lake. The following bacterial genera prevailed among the isolated strains: Bacillus, Pseudomonas, Enterobacter, Cellulomonas and Cytophaga. The lipolytic activity was determined using a titrimetric method, the proteolytic activity - using a modified Anson method, and the cellulolytic activity - on the basis of mass decrement of a cellulose disk after 14 days of bacterial culture. The cultures were maintained at 28°C, pH 7.0 with the following substrates: olive oil, albumin and cellulose disk. Among the analysed microorganisms, Bacillus and Pseudomonas strains showed the highest lipolytic and proteolytic activity. In the cellulolytic assay Cytophaga bacteria showed about twofold higher activity than that of Celulomonas.
2
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Microflora of the selected water reservoirs in Swietokrzyskie Voivodship

100%
Adamus-Bialek W., Karwacka K., Bak L.
Acta Biochimica Polonica
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2013
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vol. 60
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issue 4
689-693
EN
One of the important environmental issues is the quality of surface waters in the world. Poland belongs to countries with a low quality of the inland waters. The sanitary condition of the five water reservoirs of south-east Poland was analyzed. Water and sediment samples were incubated on the selective and/or differential media. High concentrations of many common and pathogenic microbial indicators were shown in those samples. Those reservoirs are used by people, especially during summer. Because of the high epidemiological risk, detailed analysis of all inland waters should be performed routinely.
3
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The effect of bottom sediment on biomass production by Italian ryegrass and maize

75%
Wiśniowska-Kielian B.
Polish Journal of Chemical Technology
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2007
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vol. 9
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issue 4
48-51
EN
A two-year pot experiment (2005 and 2006) was conducted to estimate an effect of dredged bottom sediment from Rożnów Reservoir addition to the light, very acid soil on the plant biomass production. The sediment was applied in the amount from 1 to 20% of the substratum mass. Italian ryegrass (Lolium multiflorum L.) and maize (Zea mays L.) were cultivated as the successive test plants. The lowest amount of plant biomass was obtained on the soil (control) and each sediment addition to the substratum caused an increase of the biomass production, both tops as well as the roots of the plant. Larger sediment additions (7% and more) caused a significant increase of the yield, of both the individual plant species and the total biomass during the two years of the experiment. The bottom sediment added to the light, very acid soil distinctly improved the plant yielding and the way of biomass utilisation should be assessed on the basis of its chemical composition analysis.
4
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Determination of Degradation Products of Plant Origin Pigments in the Bottom Sediments of Lakes / Oznaczanie Zawartości Produktów Degradacji Barwników Pochodzenia Roślinnego W Osadach Dennych Jezior

75%
Cieślewicz J.
Chemistry-Didactics-Ecology-Metrology
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2012
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vol. 17
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issue 1-2
69-74
EN
The objective of this exercise was to introduce students to one of the methods used for determination of the content of pigments’ degradation products in lake bottom sediments characterised by heterogeneous physical and chemical properties. The research revealed that the studied bottom sediments were characterised by diverse content of products produced during degradation of pigments of plant origin, whereas higher concentrations of these compounds were found in sediments containing inorganic carbon (carbonates). The obtained results also indicate that it is important to have the results properly presented, particularly in the case of samples containing the carbonates.
PL
Celem opracowanego ćwiczenia było zapoznanie studentów z jedną z metod oznaczania zawartości produktów degradacji barwników w jeziornych osadach dennych o zróżnicowanych właściwościach fizykochemicznych. Badane osady denne charakteryzowały się zróżnicowaną zawartością produktów degradacji barwników pochodzenia roślinnego, przy czym wyższe stężenia tych związków otrzymano w osadach zawierających węgiel nieorganiczny (węglany). Uzyskane wyniki wskazują również, że istotną rolę odgrywa sposób przedstawiania wyników, przy czym jest to szczególnie ważne w przypadku próbek zawierających węglany.
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