polyethylene imide was synthesized from the reaction of high density polyethylene grafted maleic anhydride (pe-g-ma) and 1,4-diaminobutane in boiling xylene. the chemical compositions of the reaction products were examined by fourier transform infrared spectroscopy. different conditions and parameters like the effect of temperature, time, monomer concentration and oxygen on the extent of reacti...

in the current study, the effects of ethanol (etoh) on toxicokinetics of methamphetamine (ma) and its metabolite amphetamine (ap) were investigated. a single dose of ma hydrochloride at 15 mg/kg was given intragastrically, either alone (ma group; n = 8) or in conjunction with 3 g/kg etoh (ma+etoh group; n = 8) to rabbits. in placebo group, normal saline only was given (placebo group; n = 4). pl...

BACKGROUND Mandelic acid (MA), an important component in pharmaceutical syntheses, is currently produced exclusively via petrochemical processes. Growing concerns over the environment and fossil energy costs have inspired a quest to develop alternative routes to MA using renewable resources. Herein we report the first direct route to optically pure MA from glucose via genetic modification of th...

BACKGROUND Microalbuminuria (MA) is a known predictor of cardiovascular disease (CVD) in European origin populations, but such data are lacking in native Indo-Asian populations, where CVD risks are high. Major electrocardiographic (ECG) changes are predictive of cardiovascular mortality. We determined the association of MA with major ECG changes in the general population of Pakistan. METHODS ...

Purpose: This paper investigates how entrepreneurial finance in Qatar affects the performance of small and entrepreneurship businesses (SEB). It is first study examining financial decisions SEB Qatar, illustrating advantages disadvantages traditional innovative sources finance. In addition, we investigate impact different funding on three dimensions performance: financial, marketing internal bu...

A simple one-step route for preparing α-MnO(2) nanotubes is reported. The α-MnO(2) nanotubes exhibit a high surface area of 226 m(2) g(-1) and reversible capacity of 512 mA h g(-1) at a high current density of 800 mA g(-1) after 300 cycles, as well as cycling stability when measured as an anode in lithium batteries.

An in situ chemical synthetic approach has been designed for the fabrication of a covalently coupled hybrid consisting of graphitic carbon nitride (g-C3N4) with reduced graphene oxide (rGO) with differing g-C3N4/rGO ratio. The epoxy groups of graphene oxide (GO) undergo a nucleophilic substitution reaction with dicyandiamide (C2H4N4) to form the C2H4N4-GO composite via a covalent C-N bond, and ...