نتایج جستجو برای: constant potential direct coulometry
تعداد نتایج: 1630160 فیلتر نتایج به سال:
This study investigated the effect of anodal tDCS on motor control and corticomotor excitability in healthy controls, with the long-term goal of investigating the use of anodal tDCS to improve motor function in covertly aware vegetative state patients. Experiment I investigated the effects of anodal tDCS on a motor reaction time task, and found no effect of tDCS on performance, whether or not p...
Apparatus and techniques a re dc~cribed for t he t itration of ac ids a nd. bases by constantcurrent coulometry. The precision nnd accuraey of t he method aI~e JndLcated by tl traLlons of benzoic acid, potass ium acid pMhalate, adLpiC aCld, hydroc~lo l'l c aCid, ~nd sod ium eal'bonate. Standard deviations of ± 0.003 p er cent have been obtaIned which LndlCatp. that the reliabi li ty of the meth...
The electrooxidation of methylhydrazine, 1,2-dirnethylhydrazine, and 1,1 -dimethylhydrazine at a platinum electrode was studied using chronopotentiometry, coulometry, and product analysis. The results show that methjJlhydrazine is oxidized in an over-all four-electron reaction to nitrogen and methanol. The oxidation of 1,2-dimethylhydvazine proceeds by an initial two-electron oxidation, followe...
Conditions have been found for the determination of some phenoxazones by titanometric coulometry using platinum electrode to generate Ti(III) ions, while the point of equivalency was recorded potentiometrically. It has been found, that correct and accurate results can be obtained when the amount of ethanol in the coulometric vessel is within 2—7 ml and the amount of the substance determined is ...
In this paper, polyacrylonitrile PAN - titania TiO2 electrospun nanofiber PAN/TiO2 nanofiber was prepared via a facile electrospinning method. The characteristics of the PAN/TiO2 nanofiber were investigated using SEM and FTIR. The nanofiber showed retained nanofiber structures and high photocatalytic efficiency under UV light for the degradation of Direct Red 80 DR80 and Direct Red 23 DR23 in w...
this study examined the effects of collaborative strategic reading and direct instruction in persuasion on iranian high school students persuasive writing and attitudes. students in three intact classes were assigned to one of three treatment conditions: collaborative strategic reading and direct instruction in persuasion or direct instruction in persuasion or a control group. treatment effects...
BACKGROUND The classic sweat test (CST) is the golden standard for cystic fibrosis (CF) diagnosis. Then, our aim was compare the production and volume of sweat, and side effects caused by pulsed direct current (PDC) and constant direct current (CDC). To determine the optimal stimulation time (ST) for the sweat collection. To verify the PDC as CF diagnosis option. METHODS Prospective study wit...
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