Two types of cupric oxide (Cu₂O) nanoarchitectures (nanobelts and nanopetal networks) have been achieved via immersion nanoporous copper (NPC) templates in anhydrous ethanol. NPC templates with different defect densities have been prepared by dealloying amorphous Ti60Cu40 ribbons in a mixture solution of hydrofluoric acid and polyvinylpyrrolidone (PVP) with different ratios of HF/PVP. Both a wa...

A spectrophotometric method was used to determine the acidity constant of 4'-carboxybenzo-24-crown-8 in 52% (w/w) ethanol-water mixture. The acid dissociation constant, Ka, was found to increase in the presence of Na+, K+, Rb+, Cs+ and Tl+ ions. The formation constants of the resulting 1:1 complexes between the carboxycrown a...

The effects of preparation parameters on the performance and morphology of polydimethylsiloxane/ polysulfone (PDMS/PSf) membranes were investigated. The PDMS layer is mainly used for sealing the defects of the PSf selective layer. The membrane morphologies were characterized by using scanning electron microscopy (SEM). The CO2/CH4 separation performance of membranes was studied by a pure gas pe...

TO THE EDITOR: As ethanol is frequently used in radiopharmaceutical injections, we were interested in the effect of ethanol by injection. Several questions crossed our mind. What is the maximum concentration of ethanol that we can inject without side effects? What is the hemolytic potential of ethanol? Can we dilute ethanol-containing injections just with water? Ethanol can be used in radiophar...

BACKGROUND The reinforcing properties of orally self-administered drugs have been evaluated by using choice procedures. The preference for the drug over a nondrug alternative has indicated that the drug has greater value than the nondrug alternative as a reinforcer at some drug concentrations. However, at large drug concentrations, the fluid deliveries of the drug may be equal to or less than t...

Nonstationary motion of a liquid binary mixture in narrow long horizontal channel with rigid walls heated according to certain law is considered. The possibility applying the Ostroumov-Birikh solution description flow under study used. It reduces problem solving mixed boundary value for system parabolic equations. A feature an additional integral condition on fluid rate. allows finding pressure...

Rifabutin is wide spectrum antimicrobial agent, effective in the treatment of infection caused by M. tuberculosis, avium and Leprae also used multidrug resistant TB. very poorly water soluble drug (0.19mg/ml) with high permeability. For enhancement solubility a hydrophobic has significant role development liquid dosages form. The main purpose this study was to improve co solvency method. Differ...

PURPOSE To evaluate the feasibility and effectiveness of transcatheter embolization by forcible intraarterial injection of a mixture of ethylene vinyl alcohol copolymer (EVAL) and ethanol under microballoon occlusion compared with conventional transcatheter arterial embolization methods in nontumoral swine liver. MATERIALS AND METHODS Nine swine were divided into three groups: embolization wi...

In this work, we propose the optimal flowsheet for the production of bioethanol from switchgrass, via hydrolysis. A superstructure embedding a number of alternatives is proposed. Two technologies are considered for switchgrass pretreatment, dilute acid and ammonia fibre explosion (AFEX) so that the structure of the grass is broken down. Next, enzymatic hydrolysis follows any of the pretreaments...