The renal excretion of renin infused intravenously was studied in anesthetized rats. The renin in the urine was adsorbed onto DEAE cellulose and selectively eluted for separate assay on the rat blood pressure preparation. The influence of saline loading, furosemide, mercuric chloride, and maleic acid was determined by following the changes in renin excretion. Both mercuric chloride and maleic a...

Urea-hydrogen peroxide (UHP) was used in the presence of maleic anhydride as mediator in a simple and convenient method for the oxidation in high yield of some thiols to the corresponding disulfides. Peroxymaleic acid formed in situ from the reaction of UHP with maleic anhydride has a key role in this oxidation. Performance of the reaction in various solvents showed that methanol was the solven...

In this work, post-consumer polypropylene and wood flour from Pinus elliottii were used to produce wood plastic composites. The effect of polypropylene grafted with itaconic acid used as a coupling agent on mechanical properties, thermal stability and morphology of the composites was investigated and compared with the composite developed with polypropylene grafted with maleic anhydride, commonl...

In this paper, a kinetic study of the oxidation of maleic and fumaric acid organic particles by gas-phase ozone at relative humidities ranging from 90 to 93% is reported. A flow of single component aqueous particles with average size diameters in the range 2.6–2.9 mm were exposed to a known concentration of ozone for a controlled period of time in an aerosol flow tube in which products were mon...

The unexpected appearance of a new polymorph of maleic acid is reported and a computational study addresses the predictability of this new polymorph and future potential polymorphism.

Abstract In this manuscript the impact of three organic molecules (in presence and absence zinc ions) in a more realistic solution medium is presented. The synthetic urinary on morphology calcium oxalate monohydrate formed similar to that seen citric acid, dominant component. particles are relatively flat, rounded particles. ions, little changed with main change being different acids show impac...

A new biphasic organic solvent, phenoxyethanol-maleic acid, was carried out to pretreat and fractionate vinegar residue into glucan, xylan lignin under mild conditions. Additional effects of key factors, temperature phenoxyethanol concentration, on residue, were evaluated. Under the system (0.5% maleic 60% phenoxyethanol), 140 °C cooking for 1 h, 80.91% cellulose retention in solid 75.44% hemic...

This work is the continuation of a study focused on establishing relations between surface thermodynamic properties and in vitro release mechanisms using a model drug (ampicillin trihydrate), besides analyzing the granulometric properties of new polymeric materials and thus establishing the potential to be used in the pharmaceutical field as modified delivery excipients. To do this, we used cop...