Naslov
Investigation of Sea-surface Microlayer and Phytoplankton Culture Samples by Monolayer Techniques and Brewster Angle Microscopy
(Investigation of sea-surface microlayer and phytoplankton culture samples by monolayer techniques and Brewster angle microscopy)

Autori
Kozarac, Zlatica ; Moebius, Dietmar ; Spohn, Daniela B.

Izvornik
Croatica chemica acta (0011-1643) 71 (1998), 2; 285-301

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Sea-surface microlayer; Phytoplankton culture; Monolayer techniques; Brewster angle microscopy

Sažetak
Natural samples of sea-surface microlayer and phytoplankton culture samples have been studied by monolayer techniques and by Brewster angle microscopy (BAM). Surface pressure-area (pi-A) and surface potential-area isotherms have been measured. Simultaneously BAM video images have been recorded. The pi-A isotherms, as well as BAM images of monolayers of dipalmitoyl phsophatidylcholine (DPPC), dimyristoylphosphatidic acid (DMPA) and dioctadecyldimethyl ammonium bromide (DOMA) spread on an aqueous subphase containing a sample of phytoplankton culture show that surface active substances released by phytoplankton influence molecular organization as well as domain morphology of the lipid monolayers. The sea-surface microlayer sample spread at the air/water interface exhibits the characteristics of a liquid expanded phase without undergoing a phase transition. The BAM images taken from this film depend on surface pressure, showing at low surface pressures liquid condensed domains surrounded by a liquid expanded phase, and at higher surface densities only a liquid condensed phase.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA