نتایج جستجو برای: cell membrane
تعداد نتایج: 1916806 فیلتر نتایج به سال:
Medicinal plants exerted their antibacterial effects through many mechanisms included inhibition of cell wall synthesis, membrane disruption cytoplasmic membrane, bacterial proteins nucleic acid energy metabolism, as well virulence factors. The current review highlighted the medicinal with activity spectrum action.
Parametric study of the influence of cooling channel dimensions on PEM fuel cell thermal performance
In a polymer membrane fuel cell more than half of the chemical energy of hydrogen is converted to heat during generation of electricity. This causes an increase in the cell temperature. The Cooling field design has a significant role in cell cooling. The cell's performance and stability are reduced due to inappropriate heat dissipation. In this paper, the cooling flow and heat transfer in cooli...
Background and objectives: Black cumin is a herbaceous plant with scientific name Nigella sativa, that contains compounds such as fixed oils, proteins, alkaloids, saponins and essential oils. It has numerous health benefits including antioxidant and anti-inflammatory properties. In the current study, we have evaluated the cytotoxic effects of compounds isolated from th...
Abstract Background: The amniotic membrane has gained much attention in regenerative medicine as a precious cell source. Recently, reparation of three dimensional matrices (scaffold) with appropriate specificity for cell culture, which depends on cell type, has been the subject of many studies .This study aimed to design optimal three-dimensional matrices in order to utilize amniotic epithel...
In this paper we study the performance of a PEM stack fuel cell after 900 hours of operation. We tried to identify any voltage degradation and its causes. Microscopic cracks on some parts of MEA mainly due to uniformity of pressure, stress concentration and elongation of membrane in the edge of GDL has been identified as the most important cause of this gradual degradation. High contact resista...
The uptake and transport of 9-nitrocamptothecin (9-NC), a potent anticancer agent, across Caco-2 cell monolayers was studied as a free and PLGA nanoparticle loaded drug. Different sizes (110 to 950 nm) of 9-nitrocamptothecin nanoparticles using poly (lactic-glycolic acid) were prepared by via the nanoprecipitation method. The transport of nanoparticles across the Caco-2 cell monolayer as a func...
The uptake and transport of 9-nitrocamptothecin (9-NC), a potent anticancer agent, across Caco-2 cell monolayers was studied as a free and PLGA nanoparticle loaded drug. Different sizes (110 to 950 nm) of 9-nitrocamptothecin nanoparticles using poly (lactic-glycolic acid) were prepared by via the nanoprecipitation method. The transport of nanoparticles across the Caco-2 cell monolayer as a func...
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