Results 221 to 230 of about 488,446 (257)
Some of the next articles are maybe not open access.
Determinants of apical membrane permeabilities of barrier epithelia
American Journal of Physiology-Cell Physiology, 1994Renal collecting duct and thick ascending limb, as well as stomach, exhibit strikingly low permeabilities to water and solutes. However, the apical membrane characteristics responsible for these unique permeabilities remain unknown. While the lipid composition of artificial membranes governs membrane permeability, exoplasmic and cytoplasmic leaflets ...
M B, Lande, N A, Priver, M L, Zeidel
openaire +2 more sources
The Influence of Barrier Membranes on Autologous Bone Grafts
Journal of Dental Research, 2008In implant dentistry, there is continuing debate regarding whether a barrier membrane should be applied to cover autologous bone grafts in jaw augmentation. A membrane would prevent graft remodeling with resorption and enhance graft incorporation.
Gielkens, P. F. M. +7 more
openaire +3 more sources
Membrane barrier of a porcine hepatocyte bioartificial liver
Liver Transplantation, 2003Pores in the membrane of a bioartificial liver (BAL) allow it to function as a semipermeable barrier between its contents (i.e., liver cells) and components of the recipient’s immune system. This study is designed to assess the influence of pore size on immune response to a BAL containing porcine hepatocytes.
Scott L, Nyberg +6 more
openaire +2 more sources
Modifying a Proton Conductive Membrane by Embedding a “Barrier”
The Journal of Physical Chemistry B, 2010For development of proton conductive membranes, it is a difficult dilemma to balance proton conductivity and methanol permeability; however, this research proposes a simple strategy to solve this problem, i.e., embedding a proton conductive "barrier" into the perflorosulfonated matrix.
Liang, Wu +7 more
openaire +2 more sources
ELUSIVE BARRIERS: THE CHALLENGES OF DIAGNOSING SUBAORTIC MEMBRANES
Journal of the American College of CardiologySubvalvular aortic stenosis (SAS) is a relatively uncommon cause of left ventricular outflow tract (LVOT) obstruction, constituting only 8-20% of cases. Among the etiologies, subaortic membranes (SAoM) are the most prevalent, manifesting in various anatomical forms, including thin discrete membranes, fibromuscular ridges, and diffuse tunnel-like ...
Malik Alqawasmi +3 more
openaire +2 more sources
The Nuclear Membrane as a Barrier to the Free Diffusion of Proteins
Nature, 1960A RECENT investigation of the osmotic properties of the nucleus in intact frog oocytes has indicated that the nuclear membrane of these cells is not freely permeable to large molecules (mol. wt. 40,000 or greater)1. The present investigation was carried out in order to determine whether or not similar results could be obtained for oocytes of an ...
C M, FELDHERR, A B, FELDHERR
openaire +2 more sources
Structural Features of Barrier Membranes
2000Most cell membranes are surprisingly permeable to water and small uncharged solutes. This property is a consequence of both the fluid and anisotropic nature of the phospholipid bilayer. Water molecules are able to partition into the proximal region of the hydrocarbon core and then diffuse across the bilayer before dissolving in the aqueous environment ...
Warren G. Hill +2 more
openaire +1 more source
Membranes and barriers: with a focus on the gastric mucosal barrier.
Clinical and investigative medicine. Medecine clinique et experimentale, 1987In this review I have discussed the importance of barriers retarding the transport of electrolytes, non-electrolytes, proteins, and water to the maintenance of physiological homeostasis, and how disruption of these barriers can lead to severe pathological consequences. At the cellular level, I have discussed the potential localization of these barriers
openaire +1 more source
Crossing the Hydrophobic Barrier--Insertion of Membrane Proteins
Science, 1996In this issue of Science , Song et al . ( p. 1859 ) provide the first high-resolution x-ray view of a transmembrane protein that spontaneously inserts into the lipid bilayer.
openaire +2 more sources