Avtor/Urednik		Peterlin, Primož
Naslov		Frequency-dependent electrodeformation of giant phospholipid vesicles in AC electric field
Tip		članek
Vir		Journal of biological physics
Vol. in št.		Letnik 36, št. 4
Leto izdaje		2010
Obseg		str. 339-54
Jezik		eng
Abstrakt		A model of vesicle electrodeformation is described which obtains a parametrized vesicle shape by minimizing the sum of the membrane bending energy and the energy due to the electric field. Both the vesicle membrane and the aqueous media inside and outside the vesicle are treated as leaky dielectrics, and the vesicle itself is modeled as a nearly spherical shape enclosed within a thin membrane. It is demonstrated (a) that the model achieves a good quantitative agreement with the experimentally determined prolate-to-oblate transition frequencies in the kilohertz range and (b) that the model can explain a phase diagram of shapes of giant phospholipid vesicles with respect to two parameters: the frequency of the applied alternating current electric field and the ratio of the electrical conductivities of the aqueous media inside and outside the vesicle, explored in a recent paper (S. Aranda et al., Biophys J 95:L19-L21, 2008). A possible use of the frequency-dependent shape transitions of phospholipid vesicles in conductometry of microliter samples is discussed.
Deskriptorji		BIOPHYSICS PHOSPHOLIPIDS PARTICLE SIZE MEMBRANES, ARTIFICIAL ELECTROMAGNETIC FIELDS ELECTRIC CONDUCTIVITY CONDUCTOMETRY