نتایج جستجو برای: hydrogen peroxide decomposition
تعداد نتایج: 247531 فیلتر نتایج به سال:
Background and purpose: About 50% of infertility in couples is related to male factors and oxidative stress is one of the main causes of infertility in men. Hydrogen peroxide has an adverse effect on male reproductive system due to its free radicals. Spirulina and phycocyanin are known to have antioxidant properties and can modify stressors. Materials and methods: In this experimental study, ...
Crosslinked functionalized polymers are highly efficient in immobilizing transition metal ions. The activity of Fe(III), Co(II), Ni(II) and Cu(II) complexes of polystyrene bound Isoxazole resin have been tested towards the decomposition of hydrogen peroxide. The decomposition reaction followed a first order dependence on the concentration of both the substrates and the catalyst. The metal compl...
conclusions the bleaching procedures using 20% carbamide peroxide and 45% carbamide peroxide and diode laser significantly decreased shear bond strength of brackets to the teeth. 45% carbamide peroxide had a more significant effect on bond strength compared to 20% carbamide peroxide. the difference in bond strength was not significant between laser group and either carbamide peroxide groups. re...
Hydrogen peroxide has recently been considered as a monopropellant in micropropulsion systems for the next generation of miniaturized satellites (‘nanosats’) due to its high energy density, modest specific impulse and “green” characteristics. Efforts at the University of Vermont have focused on the development of a MEMS-based microthruster that uses the catalyzed decomposition of hydrogen perox...
recent developments in hydrogen production by thermochemical water decomposition are reported,with an emphasis on hydrogen production from non-fossil energy sources such as nuclear and solar. numerousdevelopments have been made on sulphur-iodine, copper-chlorine and other thermochemicalcycles. efforts are described to lower the temperatures required in thermochemical cycles, so as to broadenthe...
Deepak Ahuja, Leonidas Bachas, D.Bhattacharyya Department of Chemical & Materials Engineering, and Department of Chemistry, University of Kentucky, Lexington, KY 40506-0046 *Corresponding author: Dr. D.Bhattacharyya, Alumni Professor, Phone: (859)257-2794, e-mail: [email protected] . Abstract. Various remediation technologies are being developed for the destruction of groundwater pollutants like ...
Background: There is clear evidence to support the importance of regular physical activity and the use of antioxidants in the prevention or control of cardiovascular diseases, especially those that cause cardiac apoptosis. Our aim in this study was to determine the simultaneous effect of six weeks forced swimming and Crocin supplementation on the expression of 3 cardiomyocyte gene caspase in ma...
A one-dimensional model has been developed to investigate the thermal decomposition of rocket grade hydrogen peroxide (HP) in a stream of previously decomposed HP products. The model developed assumes steady, one-dimensional adiabatic flow and includes basic mass balances, droplet evaporation, gasphase decomposition kinetics, droplet dynamics, and control volume conservation laws. The code is a...
Background: Poly chlorinated biphenyls (PCBs) are a class of chlorinated organic chemicals that do not easily degrade in the environment. This study was conducted to determine the effect of microwave rays, hydrogen peroxide, dioxide titanium and ethanol solvent on the degradation of PCBs. Methods: A 900w domestic MW oven with a fixed frequency of 2450 MHZ was used to provide MW irradiation. R...
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