The recovery of copper from circuit boards is currently a hot topic. However, recycling economically and environmentally still considerable challenge. In this study, simple hydrothermal method was used to synthesize MoS2 with nano-flower-like morphology using sodium molybdate dihydrate thiourea as molybdenum sulfur sources. metal in the chip successfully dissolved under action free radicals pro...

This is a summary report of the “AAPS Workshop on the Role of Dissolution in QbD and Drug Product Life Cycle” organized by the AAPS In Vitro Release and Dissolution Testing (IVDRT) Focus Group. Representatives from the pharmaceutical industry, regulatory authorities, and academia in the U.S. and Europe attended this workshop to discuss the role of dissolution in a Quality by Design (QbD) settin...

In spite of the environmental and commercial interests in the bacterial leaching of pyrite, two central questions have not been answered after more than 35 years of research: does Thiobacillus ferrooxidans enhance the rate of leaching above that achieved by ferric sulfate solutions under the same conditions, and if so, how do the bacteria affect such an enhancement? Experimental conditions of p...

Changes occurring in the degree of crystallinity and lamellar thickness distribution of poly(viny1 alcohol) (PVA) samples during dissolution in water were investigated. PVA samples of three different molecular weights were crystallized by annealing a t 90,110, and 120°C. The initial degrees of crystallinity measured by differential scanning calorimetry (DSC) and by attenuated total reflection F...

We have shown that the cholesterol monohydrate dissolution rate acceleration in chenodeoxycholic acid solutions due to the addition of hexylamine and octylamine may be directly related to their ability to bind to the negatively charged chenodeoxycholate micelles. Based on these results, we have proposed that the primary mechanism by which these amines accelerate the dissolution rate is by reduc...

The dissolution of deposited, protective iron carbonate fi lms in oil and gas transportation pipelines may drastically enhance corrosive processes on steel surfaces, and thus, seriously affect the longevity of the equipment in use. An investigation had been carried out to get a better understanding of the kinetics and underlying mechanism of fi lm dissolution, as well as to provide baseline dat...

Using tracings of (125)I-labeled fibrin(ogen) in rodents, we examined the hypothesis that platelets impede the lysis of pulmonary emboli. (125)I-Microemboli (ME, 3-10 micron diameter) lodged homogeneously throughout the lungs after intravenous injection in both rats and mice (60% of injected dose), caused no lethality, and underwent spontaneous dissolution (50 and 100% within 1 and 5 h, respect...