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Titolo:
Film formation by marine bacteria at a model fluid interface
Autore:
Zutic, V; Ivosevic, N; Svetlicic, V; Long, RA; Azam, F;
Indirizzi:
Rudjer Boskovic Inst, Ctr Marine & Environm Res, Zagreb 100001, Croatia Rudjer Boskovic Inst Zagreb Croatia 100001 m Res, Zagreb 100001, Croatia Univ Calif San Diego, Scripps Inst Oceanog, Div Marine Biol Res, La Jolla,CA 92093 USA Univ Calif San Diego La Jolla CA USA 92093 iol Res, La Jolla,CA 92093 USA
Titolo Testata:
AQUATIC MICROBIAL ECOLOGY
fascicolo: 3, volume: 17, anno: 1999,
pagine: 231 - 238
SICI:
0948-3055(19990618)17:3<231:FFBMBA>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
ORGANIC-MATTER; SEA-WATER; ELECTRIFIED INTERFACE; NATURAL-WATERS; POLAROGRAPHY; PARTICLES; ADHESION; SURFACES; SEAWATER; HYDROPHOBICITY;
Keywords:
marine bacteria films; bacterial attachment; electrochemical detection of adhesion;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
48
Recensione:
Indirizzi per estratti:
Indirizzo: Zutic, V Rudjer Boskovic Inst, Ctr Marine & Environm Res, Zagreb 100001, Croatia Rudjer Boskovic Inst Zagreb Croatia 100001 greb 100001, Croatia
Citazione:
V. Zutic et al., "Film formation by marine bacteria at a model fluid interface", AQUAT MIC E, 17(3), 1999, pp. 231-238

Abstract

We have characterized the nonspecific interactions in the initial attachment and film formation by marine bacteria at a dynamic fluid interface: seawater/dropping mercury electrode. Experimental evidence is presented that bacteria readily establish molecular contact with the metal substrate withoutmediation of a conditioning film. Prevalence of hydrophobic over electrostatic interactions and the possible importance of Ca2+ bridging could be inferred. The attachment of individual bacterial cells is faster than their transport from the aqueous medium, as is the case in the transport-controlledadsorption of biopolymers. The cell aggregates yield distinct electrical attachment signals, allowing a comparison between cell-cell and cell-substrate affinities. The cell-cell interactions, as well as the interaction of cell aggregates with negatively charged substrate, were greatly enhanced in seawater compared to pure NaCl solutions. The model experiments point out that marine bacteria should represent a significant component of the initial film formed at freshly exposed surfaces in seawater. This was found to holdfor bacterial strains whether they were initially isolated as attached or as free-living.

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Documento generato il 03/12/20 alle ore 12:17:28