نتایج جستجو برای: semipermeable membranes
تعداد نتایج: 94007 فیلتر نتایج به سال:
Osmosis is usually taught from the point of view of the osmotic pressure developed when solutions of different concentrations of solute are separated by an ideal semipermeable membrane. The osmotic pressure is defined at equilibrium when there is no net flow, and it takes some time to reach this equilibrium. Although the osmotic pressure is certainly important, teaching only this point of view ...
In cell transplantation therapy for the treatment of neurodegenerative disorders, encapsulation of implanted cells in a semipermeable membrane is a promising approach to protect the implanted cells from host immune rejection and inhibit the invasion of tumor into surrounding tissue if the implanted cells form a tumor after transplantation. However, implanted neurons isolated by capsules could n...
Transplantation of macroencapsulated pancreatic islets within semipermeable membranes is a promising approach for the treatment type 1 diabetes. Encapsulation beneficially isolates implants from host immune system. Deleteriously however, it also limits oxygen supply to cells. This creates challenges in loading at amount and density required meet practical demands clinical usage. To overcome thi...
Osmotically driven membrane processes (ODMP) have gained renewed interest in recent years and they might become a potential solution for the world's most challenging problems of water and energy scarcity. Though the concept of utilizing osmotic pressure difference between high and low salinity streams across semipermeable membranes has been explored for several decades, lack of optimal membrane...
Bioencapsulation involves the envelopment of tissues or biological active substances in semipermeable membranes. Bioencapsulation has been shown to be efficacious in mimicking the cell's natural environment and thereby improves the efficiency of production of different metabolites and therapeutic agents. The field of application is broad. It is being applied in bioindustry and biomedicine. It i...
Adrenal medullary chromaffin cells are a potential source of neuroactive substances for transplantation into the CNS to alleviate neurochemical deficits. In particular, work in our laboratory has suggested that adrenal medullary transplants in the spinal subarachnoid space can alleviate pain by providing sustained local delivery of catecholamines and opioid peptides. One of the major limitation...
An excessive amount of renewable energy could be possibly produced when solutions dissimilar salinities are combined simultaneously in a semipermeable membrane. The aforestated harnessing for transformation into power achieved through the pressure retarded osmosis (PRO) process. PRO system utilizes membrane separating low concentration solution from pressurized-high concentrated solution. This ...
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