The paper introduced an industrial test(300 t/a) in which sucrose fatty acid esters(SE) were synthesized by transesterification of fatty acid ethyl esters with sucrose in propylene glycol solvent.
With n(potassium dichromate)∶n(sulfuric acid)∶n(1,2 propanediol)=1 0∶4 0∶(1 5-2 5),1,2 propylene glycol was oxidized with acidic aqueous potassium dichromate solution at 60-70 ℃ by bubbling nitrogen and adding the materials for 1 5 h while the solution was distilled.
In the solution which containing water,alcohol,propylene glycol,laurocapam(8∶85∶5∶2,% w/v) the percutaneous penetration rate of ACV was 180.83±25.5(μg·cm -2 ·h -1 ).
Results:1%～5% menthol and 1%～5% azone markedly enhanced Q and k of 2% amlodipine gel(P<0.01),but 10%～30% propylene glycol decreased Q and k value of 2% amlodipine gel(P<0.01).
The results showed that the composition of 5∶5∶4[(Na 4P 2O 7 )∶(Na 5P 3O 10 )∶((NaPO 3) 6)] and 2%+3%( propylene glycol and glycerin) had the best results, the A w of the products were respectively 0.57, 0.54.The ability of glycerin to reduce A w of semisoft chicken was better than propylene glycol.
The results showed that propylene glycol mannate sulfate (PGMS) antagonized the proliferation of BCMSMC induced by IL-1 at, the concentration of 0.2, 0.4, 0. 8, 1.6mg/ml.
It was shown that the microdischarge treatment leads to degradation of ethanol yielding hydrogen, carbon monoxide, С1-С4 hydrocarbons, methanol, formaldehyde, acetaldehyde, 1,2-propylene glycol, 2,3-butylene glycol, water, and acetic acid.
A series of binary catalysts based on oxides of zinc and variable-valence metals were tested in synthesis of 2-methylpyrazine by catalytic dehydrocyclization of 1,2-propylene glycol with ethylenediamine.
Synthesis of 2-methylpyrazine by cyclocondensation of ethylenediamine with 1,2-propylene glycol in the presence of zinc-molybdenum-chromium catalysts was studied.
The castor oil base brake fluid has been found unable to meet the present-day requirements both in its performances and resource.This paper discusses the feasibility of using alkylene oxide polyethers as the lubricant base of brake fluid to replace castor oil. It aslo explores the possibility of utilizing polytriols of different molecular weight range by use of propylene glycol.The technical performances of the new brake fluid ZSM41 as such is said to equal and partly exceed the conventional SY ...
The polyesters with terminal hydroxyl groups were prepared by condensation polymerization of adipic acid with 1,4-butanediol or ethylene glycol and, in some cases, a little amount of propylene glycol. The polyurethane thermoplastics were then prepared with the polyester, 4,4'-diphenylmethane diisocyanate and 1,4-butanediol. It was found that the NCO/OH ratio in the thermoplastics and the molecular weight of the polyester show apparent effects on the physical and mechanical properties of th...
Both rivanol solution and the mixture of rivanol, glycerol, and propylene glycol were injected into the peritoneal cavities of the female rabbits. There were not significant difference on SGPT and BuN in the rabbits before and after given both rivanol preparations (40mg/kg). The livers and kidneies didn't occur significantly pathological change than control. Rivanol intraperitoneal injection may not impair the liver and kidney. When intrauterine rivanol used for termination of early pregnancy en...
propylene glycol
丙二醇
查询“propylene glycol”译词为用户自定义的双语例句
相关查询:
2008 CNKI－中国知网