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1

Distribution and activity of proteolytic bacteria in the surface and subsurface water layers in the region of the Gdansk Deep

100%
Mudryk Z., Donderski W.
Oceanological Studies
|
1996
|
vol. 25
|
issue 4
3-17
EN
The abundance and proteolytic activity of bacteria inhabiting the surface microlayers and subsurface water in the region of the Gda?sk Deep have been determined. Proteolytic bacteria occurred in large numbers, making up 60-100% of the total number of strains in the water layers investigated. Bacteria inhabiting the subsurface water layer displayed the highest mean activity of enzymes catalysing protein decomposition processes. The considerable impact of temperature, pH and salinity on protease activity was noted.
2

The effect of Attribut 70 WG herbicyde on physiological activity of selected entomophagous fungi

80%
Mazurkiewicz-Zapalowicz K., Michalcewicz W., Mietkiewski R., Janowicz K., Daraz L.
Biotechnologia
|
2004
|
issue 1
201-209
EN
In vitro examination has been carried out to determine the influence of sodium propoxycarbazone, an active ingredient of Attribut 70 WG herbicyde, in a dose of 1,10,100 and 1000 ppm on the growth, sporulation, respiration and lipolytic and proteolytic activities of Beauveria brongniartii (Sacc.) Petch and Metarrhizium flavoviride Gams et Rozsypol mycelia. A specific response of each strain to the contact with the tested herbicyde was found. Higher concentrations of Attribut 70 WG (100 and 1000 ppm) stimulated M. flavoviride sporulation, whereas they significantly reduced the reproductive potentials of B. brongniartii. However, the contact of B. brongniartii with higher doses of Attribut 70 WG had an effect on significant increase of lipolytic and proteolytic activities of that entomophage. Such a response is very indicated for soil ecosystem, as it may be employed in biological plant protection in which B. brongniartii is a very valuable fungi species that produces epizootics of numerous plant pest insects.
3

Entomopathogenic fungi of Zoophthora and Paecilomyces genus

80%
Zabza A., Greb-Markiewicz B.
Biotechnologia
|
2000
|
issue 3
47-58
EN
Variations of enzymatic activity, pH and mycelium growth during life cycle of representatives of Zoophthora and Paecilomyces species and correlation between these properties, were described. Apart from monoamino oxalate and low molecular carboxylic acids, any other compounds which could be considered as mycotoxines were not found. The enzymatic activity seems to be the main factor in the mechanism of insect infection and intoxication by both analyzed fungus species.
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