Naslov
An electrochemical approach to organic aggregation

Autori
Žutić, Vera ; Ivošević, Nadica ; Kovač, Solveg ; Svetličić, Vesna

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Abstracts of the 5th International Symposium on Model Estuaries New approaches to estuarine chemistry / Sundby, Bjorn - : INRS-Oceanologie, 1997, 48-48

Skup
International Symposium on Model Estuaries (5 ; 1997)

Mjesto i datum
Rimouski, Kanada, 25.05.1997. - 29.05.1997

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
organic aggregation; Mediterranean estuaries; hydrophobic interaction

Sažetak
We study aggregation processes of organic matter in stratified Mediterranean estuaries. A fast aggregation and importance of hydrophobic interactions have been inferred. The electrochemical probe, renewable mercury sphere electrode, allowed simultaneous detection of submicron particles collective response and individual attachment signals of larger reactive partcles (um size). Estuarine fluid surface active particles seem to be closely related to flexible transparent exopolymeric particles indentified more recently. The electrode is used as a model interface in order to decouple physico-chemical interactions in the interfacial process involving extracellular polymers, marine bacteria and phytoplankton cells. Laboratory experiments were performed in diluted seawater and conditions of enhanced transport by convective streaming. Hydrophobic interactions were identified to prevail over electrostatic repulsion in the attachment of aggregated bacteria, nanoflagellates and flexible nonliving aggregates.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA