Original scientific paper

Polarography of Marine Bacteria: A Preliminary Study

Vesna Svetličić ; Ruđer Bošković Institute, Center for Marine Research, P.O.B. 1016, 10001 Zagreb, Croatia
Nadica Ivošević ; Ruđer Bošković Institute, Center for Marine Research, P.O.B. 1016, 10001 Zagreb, Croatia
Vera Žutić ; Ruđer Bošković Institute, Center for Marine Research, P.O.B. 1016, 10001 Zagreb, Croatia
Dragica Fuks ; Ruder Bošković Institute, Center for Marine Research - Rovinj, G. Paliage 5, 52210 Rovinj, Croatia

Abstract

We report the first investigations of marine bacteria interactions with the mercury electrode/seawater interface. The effect of marine bacteria on the oxygen electro-reduction process in seawater was studied. The presence of bacteria (N > 109/mL) is manifested in a high surface activity and rapid oxygen consumption. In more diluted suspensions of bacteria (N < 109/mL), attachment of aggregated cells produces specific current transients that can be distinguished from the background response caused by the collective effect of adhesion of single cells and/or adsorption of their release products.
The general pattern of current-time curve sequences has not been described before; it seems to simultaneously reflect a heterogeneous volume distribution of cells and their release products, as well as their interfacial properties.

Keywords

Hrčak ID:

135610

URI

https://hrcak.srce.hr/135610

Publication date:

3.4.1997.

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