10 aryl propylene oxides and 6 aryl butylene oxides were synthesized. Dose-mutagenicity relationships were studied for these compounds and for 1,2-epoxybutane, using both the preincubation and plate incorporation Ames tests with Salmonella typhimurium strains TA100 and TA1535. Structure-mutagenicity relationships were further examined by concurrent testing at single doses with the plate incorpo...

Introduction Debridement of devitalised tissue is essential for successful wound healing, as formation of granulation tissue requires a clean wound bed. Devitalised tissue that may have an imbalance of bacteria may retard the healing process. Amorphous hydrogels are primarily designed to promote autolytic debridement of devitalized tissue. Hydrogels contain polymers, or gelling agents that infl...

Concentrated aqueous cornstarch (CS) suspensions are often used to demonstrate an extreme example of shear thickening rheological behaviour. Here, we describe the increased rheological complexity that occurs on the addition of poly(propylene glycol) 10 (PPG) to an aqueous CS suspension. The appearance of shear thickening/jamming, shear thinning, yield stress and near-Newtonian behaviours is dep...

A synthetic route to create highly exposed, monovalent metal cations within the linkers of metal−organic frameworks (MOFs) is proposed and analyzed computationally. Quantum chemical calculations demonstrate the thermodynamic feasibility of incorporating Cu or Ag into a MOF containing an acetylene-bearing linker via postsynthesis modification. These highly exposed metal sites are predicted to bi...

A new product (Application 460B-00) from Agilent Technologies/WassonECE uses a 5973N GC/MSD (gas chromatograph/mass selective detector) for the determination of trace levels of impurities that are moderate-to-low carbon-content such as oxygenates, mercaptans, sulfides, arsine, and phosphine in ethylene and propylene. This work describes the performance of Application 460B-00 with respect to lin...

Fisher-Tropsch synthesis (FTS) is a promising method to make alternative hydrocarbons from biomass or other resources. Upgrading the primary FTS products of considerable interest. Cracking FT wax economically attractive produce light olefins. Herein, effects zeolite type, Si/Al ratio ZSM-5, and reaction condition on catalytic cracking were investigated. It was found that pore structure acid pro...

Abstract: In this work, several metal oxides and zinc salts were used to catalyze propylene carbonate (PC) synthesis from urea and propylene glycol (PG). According to the results of catalytic test and characterization, the catalytic pattern of ZnO was different from that of other metal oxides such as CaO, MgO and La2O3, but similar to that of zinc salts. In fact, the leaching of Zn species took...