Selective catalytic reduction of NO by methane over CoH-ZSM-5 in the presence of SO_2 was studied. SO_2-TPSR and NO+(O_2)-TPD techniques were applied to quantify the active sites and probe the poison effect.
A new MLNi 4 5 Al 0 5 hydrogen storage was prepared. The PCT property,dynamics characteristic,property of activation,property of cycle and CO poison resistance of MLNi 4 5 Al 0 5 were investigated. The results show that all these properties of MLNi 4 5 Al 0 5 are better than those of LaNi 5,which has been used extensively.
Moreover, Ru/C has been believed to be able to resist the poison of a trace CO2, CO and H2O in synthetic gas for ammonia synthesis, while it has beennot revealed that whether the gasification of support carbon and CO2 would take place during the synthesis process.
Results showed that hydrogen damage did not form in the specimens charged in 0.5 mol/L H_2SO_4 solution without poison, and occurred with addtion of 250 mg / L As_2O_3 even at very low current density.
One problem is that commonly used Pt catalyst has low electrocatalytic activity for the methanol oxidation and the intermediates of the methanol oxidation, such as linearly adsorbed CO species would poison the Pt catalyst.
The results indicate that there no envenom condition of DSP and PSP in both producing area and temporary cultivating area of Asiatic hard clam in Fujian seaboard.
The article introduces the advantages and principium of SPE water electrolysis,and describes membrane-electrode assemblies(MEAs) and all kind preparation methods of MEAs,including pretreatments of membrane and mechanism of impurity ions envenom the Pt electrode,The article summarizes the selection of substrate as current collector,and the method of coatings preparation,the key issues on the cell configuration design,and brings forward expectation to SPE water electrolysis.
X-ray photoelectron spectra for the La, Ni, Al of LaNi4.7Al0. 3 after poisoned by oxygen have been studied. After argonion sputtering,the change of La, Ni,Al, O core level spectra with XPS sputter depth has been obtained. La(OH)3, LaH2, Ni,NiO, Ni2O3, Al2O3 were observed at the surface.
We propose that therapy of patients with anticancer drugs that poison DNA topoisomerases induces formation of covalent complexes of cellular RNAs and DNA topoisomerases.
All of these complexes, metal nitrates, fungicides (bavistin and emcarb), and ligands are screened for their antifungal activity against Aspergillus niger, Fusarium oxysporum, and Aspergillus flavus using a plate poison technique.
Under steady-state conditions, a state of modes is formed with nonclassical correlation characterized by sub-Poison statistics of photons and leading to complete suppression of shot noise.
(1)In the chloralose-urethanized or curarized rabbits,infusion of saline or blood into the right auricle in amount of 8—10 ml/kg at the rate of 0.5—1.0 ml/sec induced bradycardia and hypotension. (2)Section of sino-aortic nerves and bilateral vagotomy did not alter the negative chronotropic effect due to auricular infusion,thus indicating that a local mechanism was responsible for the effect. (3)Distension of the right auricle by inflating an indwelling balloon with various pressures(20—70 mm Hg)also evoked...
The experiments were carried out on 45 adult light chloralose anaesthetizedand curarized cats.Stimulation of the right saphenous nerve with strong electric pul-ses was used as noxious stimulus.Single unit discharges of the left hippocampal forma-tion were recorded by tungsten microelectrode.The changes in unit dischargeswere recorded immediately following the acupuncture and after two,four and sixminutes respectively.Among 177 units observed,53% was pain-sensitive,40% pain unrelated and7% inhibited by noxio...
Experiments were undertaken to examine the effects of electro-acupuncture(EA)and/or,stimulation of the nucleus periventricularis hypothalami(HPV:oneof nuclei of the enkephalin system)or the nucleus arcuatus hypothalami(AR:the origin of β-endorphin system)on nucleus raphe magnus(NRM)in conscious,paralysed male rats.The unit discharge rate of NRM neurones was increased byEA.Naloxone(i.v.)blocked this effect completely.Stimulation of unilateralHPV or AR activated NRM neurons in the same way as the effect of EA...