نتایج جستجو برای: oxygen content
تعداد نتایج: 612136 فیلتر نتایج به سال:
Oxygen functional groups were removed from activated carbon in order to improve the electrochemical supercapacitor performance. Commercially available and surface-modified activated carbon electrodes were compared in non-aqueous electrolyte, which allowed stable experimentation at high voltages. N2-adsorption, FT-IR, and elemental analyzer were used to characterize the surface areas, pore volum...
Supported vanadia catalyst was successfully synthesized using wet impregnation of gamma-Alumina to study Propane Oxidative Dehydrogenation (POD). The prepared catalysts were characterized with XRD, BET, and TPR tests. In a broad temperature range (340 to 630°C), effects of vanadia loading (2.7, 5.4, and 9 wt%) and propane to oxygen ratio (3/1 to 1/3) were investigated on propane conversion as w...
Supported vanadia catalyst was successfully synthesized using wet impregnation of gamma-Alumina to study Propane Oxidative Dehydrogenation (POD). The prepared catalysts were characterized with XRD, BET, and TPR tests. In a broad temperature range (340 to 630°C), effects of vanadia loading (2.7, 5.4, and 9 wt%) and propane to oxygen ratio (3/1 to 1/3) were investigated on propane conversion as w...
Neurogenesis in the adult brain occurs mainly within two neurogenic structures, the dentate gyrus (DG) of the hippocampus and the sub-ventricular zone (SVZ) of the forebrain. It has been reported that mild hypoxia promoted the proliferation of Neural Stem Cells (NSCs)in vitro. Our previous study further demonstrated that an external hypoxic environment stimulated neurogenesis in the adult rat b...
Hyperbaric oxygen therapy is a treatment that has been gradually implemented for the treatment of several pathologic conditions. The present study evaluated the effect of hyperbaric oxygen therapy for hepatic regeneration and its relationship to mitochondrial function. Male Wistar rats underwent partial hepatectomy (70%) and subsequently underwent two sessions of hyperbaric oxygen (90 minutes e...
This research presents the results of a series of stability studies on freeze-dried formulations of human growth hormone (hGH). Chemical decomposition via methionine oxidation and asparagine deamidation as well as irreversible aggregation are characterized by HPLC. Water sorption isotherms, DSC thermograms, and pulsed proton NMR data are also obtained. No glass transition temperatures are obser...
the debate whether esp teachers need to have knowledge of the specialized field they are teaching has been an issue in the literature over the last two decades. the aim of conducting this study was to explore iranian learners’ and instructors’ beliefs and attitudes concerning the role of specialized knowledge in teaching esp classes. a seventeen item questionnaire was administered to 400 esp le...
Binding of several nitroheterocycles by mammalian cells is a function of the ambient oxygen concentration; anoxic single cells bind up to 10 times as much of these drugs as do aerobic cells. We thus hypothesized that fluorescent nitroheterocyles could be used to quantitate the fraction of hypoxic cells in multicell systems, and this was tested in multicell spheroids using a relatively nontoxic ...
In rabbits with a severe pneumococcus bacteremia, the oxygen-combining power of the blood falls progressively up to the time of death. Coincident with this there is an even more marked fall in the oxygen content of the arterial blood. The changes in the blood in infected animals are analogous to those seen when the pneumococcus is grown on blood in vitro. They are due to the conversion of hemog...
After decades of efforts, the research on resistance switching (RS) behavior in transition metal oxides has shifted to the stage of verifying the proposed models by direct experimental evidences. In this paper, RS behavior and oxygen content variation of La0.85Sr0.15TiO3/SrTiO3:Nb (LSTO/STON) were investigated by in situ transmission electron microscopy observation and in situ electron energy l...
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