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A novel optical technique is used to investigate the dynamics of coagulation of particle suspensions with aluminum salt. The relative size of aggregates formed during coagulation, expressed as a ''coagulation index,'' can be continuously measured by this t ...
The electropolishing of a B-doped diamond (BDD) film deposited by CVD was studied in HOAc-H2SO4 media. The electropolished surface was characterized by SEM, XPS, and electrochem. measurements. In 1 M H2SO4 no polishing of the surface occurred even after pr ...
4-benzoylpyridine thiosemicarbazone (H(4)Bz(4)DH) and N(4')-phenyl-4-benzoylpyridine thiosemicarbazone (H4Bz4Ph) were obtained and fully characterized by infrared, UV and NMR spectroscopies. The assignment of the NMR signals was made by using DEPT135 and t ...
Ozone prodn. in 5M H2SO4 with Ti/IrO2/SnO2 - Sb2O5 electrodes was studied. Electrodes were prepd. at 550 Deg by spray pyrolysis of a soln. of precursors contg. tin and antimony chlorides. The aim of this work was to elucidate the mechanism of activation an ...
We have studied the role of the CD28/B7 co-stimulatory pathway in the development of a Th2-type lung immune response. Mice injected two or three times intraperitoneally with ovalbumin in alum adjuvant and then re-exposed to the same antigen by intranasal ( ...
A new industrial process for the electrolytic regeneration Mn2(SO4)3 is presented in which: a slurry of MnSO4/Mn2(SO4)3 in 55% H2SO4 was used as a carrier, the electrolyte is purified with an optimum mode before electrogeneration, and a new industrial elec ...
A symposium report on the gas-phase methylation of catechol by methanol on g -Al2O3 modified by the basic elements: K, Li, Mg and Ca. Addn. of 7.5 at % Mg to g-Al2O3 was optimal and increased the 3-Me catechol selectivity from 0.26 to 0.65. X-ray diffracti ...
After a partial deactivation, g-alumina (g-Al2O3) is a good catalyst for selective methylation of 1,2-benzenediol at 260-310 Deg. The main products are the desired 3-methyl-1,2-benzenediol and 2-methoxyphenol, which may be converted in another step into 3- ...
The electrochem. oxidn. of Mn(II) in H2SO4 (30% wt.) has been studied using cyclic voltammetry. The mechanism was shown to be of the type ECE (Electrochem.-Chem.-Electrochem.). The deposition of MnO2 on the anode can be avoided by inhibiting the chem. reac ...
In this process a carrier (Mn+) is electrochem. oxidized (or reduced) and then allowed to react with the org. compd. in a sep. vessel. When the reaction is complete a sepn. of product is made and the spent liquor is returned to the electrochem. cell where ...
