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- W85491698 abstract "The Iodine-Laser Temperature-Jump (ILTJ) method has been used to measure the dynamic processes which represent the main phase transition in phospholipid bilay- ers. We found five well-separated relaxation phenomena between 10 -9 s and 10 ° s. By choosing turbidity, fluorescence of absorption as detection parameters it is possible to create a dynamic model which attempts to explain the complex molecular processes dur- ing the crystalline fluid transition. Bilayers containing cholesterol show strong changes in the relaxation times and the co-operativity of the processes between 10-6 s and 10-1 s. The incorporation of functional polypeptides or proteins like gramicidin and bacteriorhodopsin shifts the relaxations to shorter times and reduces the co-operativity. If we combine all the kinetic results we con- clude that there are certain time domains in which the interactions of phospholipids and functional units inside the bilayer favour the switching of the membrane from a passive into an active role or vice versa. Abstract: In order to gain information on the gelation mechanism of PVC in diethyl malonate, investigation of dilute solutions has been achieved through the use of transient electric birefringence, dynamic light scattering and viscometry. The dynamical structure factor obtained from the cumulant analysis of the autocorrelation function of scattered field exhibits an anomalous K dependence which can be assessed to an intra molecular effect. Transient electric birefringence experiments show that the aggregates exhibit a per- manent dipole which we assume to be associated with crosslinks of small syndiotactic crystallites. Measurements of intrinsic viscosity and rotational diffusion coefficient pro- vide information on the internal structure of the aggregates formed by quenching dilute PVC solutions." @default.
- W85491698 created "2016-06-24" @default.
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- W85491698 date "2007-09-19" @default.
- W85491698 modified "2023-09-27" @default.
- W85491698 title "Kinetics of the phase transition in phospholipid bilayers" @default.
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- W85491698 doi "https://doi.org/10.1007/3-798-50724-4_101" @default.
- W85491698 hasPublicationYear "2007" @default.
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