The present study investigated a novel method of alkaline ferricyanide leaching to extract palladium (Pd) from Western Australian disseminated platinum-group metal (PGM) oxide ore that bears Ni and Cu. While cyanide has been used leach Pd, it is well known for its toxicity large consumption in the presence base metals. A more benign alternative, form ferricyanide, evaluated this research serve ...

Pentoxifylline is a methylxanthine derivative that has been used for several decades in the symptomatic management of intermittent claudication. For reasons that remain fairly obscure, this drug benefits blood rheology in a number of complementary ways: decreasing blood and plasma viscosity, lowering plasma fibrinogen while promoting fibrinolysis, and improving blood filterability by enhancing ...

By JOHN E. ULTMANN AND CLARA S. GORDON T HE LIFE SPAN and sites of sequestration of erythrocytes with naturally occurring or induced red cell abnormalities in man and in animals have been studied by a number of investigators. Injuries induced by heat treatment or prolonged incubation,1 lecithin,5 l fluoride,6 incomplete agglutinins,4’79 metalloproteins,5 or by sulfhydryl inhibition with N-ethyl...

Viruses may be major structuring elements of phytoplankton communities and hence important regulators of nutrient and energy fluxes in aquatic environments. In order to ascertain whether viruses are potentially important in dictating phytoplankton community structure, it is essential to determine the extent to which representative phytoplankton taxa are susceptible to viral infection. We used a...

N-Phenylacetyl-L-phenylalanine (PAP) and L-phenylalanyl-3-aminopyridine ( PAPA ) are biaromatic agents with properties that make them suitable candidates for the development of a useful therapeutic agent for the treatment of sickle cell disease. PAP and PAPA are taken up by the erythrocyte to give intra-/extracellular concentration ratios of 2.2 and 1.5, respectively, after a 2-hr exposure peri...

Silicon (Si), as silicic acid, is suggested to be the natural antidote to aluminium (Al) toxicity, and was recently shown to promote the urinary excretion of Al from body stores. The metabolism of Si in man, however, remains poorly investigated. Here we report on the pharmacokinetics and metabolism of Si in healthy volunteers following ingestion of orthosilicic acid (27-55 mg/l Si) in water. We...

Procaine hydrochloric acid, a cationic anesthetic, although unable to prevent the effect of calcium ionophore A23187 on erythrocytes, inhibited the discocyte--echinocyte transformation, increased viscosity, and decreased filterability of red cells undergoing ATP depletion. The effects were abolished by washing ATP-depleted, procaine HCl-treated red cells prior to these determinations. Procaine ...

Consideration has been given to the effect of vacuum pan circulation on sugar quality particularly with reference to filterability. It has been suggested1 that the introduction of a mechanical circulator, or stirrer, would enable the process to be carried out within closer temperature limits, so that the occlusion of undesirable substances could be prevented. In considering the possible install...