โ Scribed by Niloofar Asgharian; Xiaomao Wu; Ronald L. Meline; Bela Derecskei; Hong Cheng; Z.A. Schelly
No coin nor oath required. For personal study only.
Transient electric birefringence is induced by single, high-voltage electric square pulses in isotropic aqueous suspensions of unilamellar bilayer vesicles (liposomes) prepared from the surfactants egg L-a-phosphatidylcholine (EPC) or dioleoylphosphatidylcholine (DOPC). Preliminary results for DOPC vesicles are presented on the effects of concentration, temperature, and electric field strength on the steady-state induced optical retardation 6,. Within the ranges investigated, the positive 6. is relatively insensitive to change in temperature, but depends on the other variables. Possible mechanisms of the induction of birefringence are discussed. 0 1997 Ekevier Science B.V.
๐ SIMILAR VOLUMES
The polymerization of actin was followed by the measurement of electric birefringence. Small elementary polymers of actin which appeared at very low salt concentrations or at the initial stage of polymerization showed a positive electric birefringence. They were oriented with the long axis parallel