Search results
Results From The WOW.Com Content Network
The solid phase is commonly referred to as a “gel” phase. All lipids have a characteristic temperature at which they undergo a transition from the gel to liquid phase. In both phases the lipid molecules are constrained to the two dimensional plane of the membrane, but in liquid phase bilayers the molecules diffuse freely within this plane.
This random walk exchange allows lipid to diffuse and thus wander across the surface of the membrane.Unlike liquid phase bilayers, the lipids in a gel phase bilayer have less mobility. [31] The phase behavior of lipid bilayers is determined largely by the strength of the attractive Van der Waals interactions between adjacent lipid molecules ...
In physics, chemistry, and other related fields like biology, a phase transition (or phase change) is the physical process of transition between one state of a medium and another. Commonly the term is used to refer to changes among the basic states of matter : solid , liquid , and gas , and in rare cases, plasma .
Historically, many cellular non-membrane bound compartments identified microscopically fall under the broad umbrella of biomolecular condensates. In physics, phase separation can be classified into the following types of colloid, of which biomolecular condensates are one example:
The material of the membrane plays an important role in its ability to provide the desired performance characteristics. It is optimal to have a membrane with a high permeability and sufficient selectivity and it is also important to match the membrane properties to that of the system operating conditions (for example pressures and gas composition).
The following was determined regarding the liquid-order and liquid-disordered transitions during the addition of cholesterol in the presence of ethanol in each model membrane: 1) 0–15 mol% cholesterol a liquid-disordered phase was present 2) from 15 to 30 mol% there was a co-existence of both phases and 3) above 27 mole% of cholesterol the ...
In thermal equilibrium, each phase (i.e. liquid, solid etc.) of physical matter comes to an end at a transitional point, or spatial interface, called a phase boundary, due to the immiscibility of the matter with the matter on the other side of the boundary. This immiscibility is due to at least one difference between the two substances ...
CL shows a great variety of forms of aggregates. It is found that in the presence of Ca 2+ or other divalent cations, CL can be induced to have a lamellar-to-hexagonal (L a-H II) phase transition. And it is believed to have a close connection with membrane fusion. [16]