نتایج جستجو برای: membrane permeability
تعداد نتایج: 427273 فیلتر نتایج به سال:
Abstract Synthesis of proton-conducting materials based on track-etched membranes from polyvinylidene fluoride and sulfonated cross-linked polystyrene is described. The synthesis has been carried out by filling the pores original or gamma-irradiated membrane copolymerization styrene/divinylbenzene followed sulfonation with chlorosulfonic acid. resulting have studied scanning electron microscopy...
The nano-aggregation of carotenoids in microbial membranes increases membrane stability upon butanol exposure by reducing the fluidization effect and permeability butanol.
Membrane permeability to ions and small molecules is believed to be a critical step in the pathology of Alzheimer's disease (AD). Interactions of oligomers formed by amyloid-β (Aβ) peptides with the plasma cell membrane are believed to play a fundamental role in the processes leading to membrane permeability. Among the family of Aβs, pyroglutamate (pE)-modified Aβ peptides constitute the most a...
Silica scaling is one of the major challenges in Reverse Osmosis (RO). The safe operation practice to keep silica concentration below 150 mg/L RO concentrate. This study addresses effects divalent cations such as calcium and magnesium on a seawater installation used pretreatment Eutectic Freeze Crystallisation (EFC). Results showed that absence antiscalant sustained approximately 280 concentrat...
1. We have examined the inter-relationships between erythrocyte sodium content and sodium transport in a group of healthy subjects and in groups of patients with disorders known to change the sodium content of erythrocytes. 2. In the healthy subjects the sodium content of erythrocytes was inversely related to both the permeability of the erythrocyte membrane to sodium (as measured by the unidir...
Polyvinylchloride (PVC) based heterogeneous cation exchange membranes were prepared by the solution casting technique. The effect of super activated carbon nanoparticles concentration as filler additive in membrane matrix on ionic transfer behaviors of the membrane was studied. SOM images showed uniform particles distribution and relatively uniform surfaces for the membranes. The membrane water...
The electrical membrane potential (E(m)) and electrical membrane resistance (R(m)) were measured continuously during the first cleavage of Xenopus eggs, using intracellular microelectrodes. A sharp hyperpolarization of E(m) and decrease in R(m) can be observed from 6 to 8 min after the onset of cleavage. This moment coincides with the onset of the insertion of new membrane (Bluemink and de Laat...
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