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ENZYMATIC ACTIVITIES FOR THE CRIÂȘUL ALB RIVER SEDIMENTS


MARIOARA NICOLETA FILIMON, MIHAI DRĂGAN-BULARDA

Issue:

SCSB, Volume X

Section:

Biochemistry

Abstract:

The activity of many enzymes from the soil, or sediments, is a composition of the varied intracellular and extracellular enzymatic components which are produced by microorganisms (bacteria, fungi) or derivatives from the animal and vegetal sources (rests from plants). The enzymatic activities from the soil or sediments are controlled by enzymes included in 4 classes: hidrolase, oxidoreductase, transferase and liase. Urease catalyses the reactions both inside and outside of the organisms that synthesize them, some proteinases can function only outside the cells because of their large size of their substratum and other enzymes such as dehidrogenase ones with some implications in important aspect of the metabolism can function only intracellular (Gianfreda and co., 1996).

The sediments are a key link in the biochemical cycle of the elements from the aquatic ecosystem. The organic substances are mineralized here, the ones which were not degraded in water (Muntean and co., 2001).

We made a lot of research on the quantitative and qualitative enzymatic activities in the aquatic sediments in the MureÂș river (Muntean and all, 2004), in the lakes Ursu and Negru (Muntean and co., 1999), Bazna and Blaj (DrĂŁgan-Bularda and co., 2000), GilĂŁu (Lumperdeanu and DrĂŁgan-Bularda, 2002).

Keywords:

bacteriologic enzymes, phosphatase, catalase, dehydrogenase, urease, olygase, polyase, CriÂșul Alb river.

Code [ID]:

SCSB200510V10S02A0009 [0002577]


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