Solvent extraction studies of copper and zinc have been carried out using Versatic 10 acid and Cyanex 272 separately from a model brass pickle liquor. Various parameters for the extraction and separation of copper and zinc such as effect of pH, extractant concentration, phase ratio etc. have been optimized. It was observed that copper was almost completely extracted into the organic phase compr...

A quick, simple and effective chromatographic method for the separation of beryllium from a wide range of elements is described. The elements selected comprise elements which can interfere with the determination of beryllium by inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and elements which commonly occur in environmental and industrial sample matrices. Beryllium is separat...

La recuperación del ion de Litio se ha vuelto una búsqueda constante debido al incremento demanda baterías recargables. El objetivo este trabajo fue evaluar los extractantes; Cyanex 272 y 936P para determinar el extractante con mayor afinidad Li. Se analizó la eficiencia extracción ambos extractantes utilizando licores lixiviación sintéticas que contenían Li, K Al, donde evaluó pH porcentaje co...

This year the University of Waterloo (UW) participated in the TREC Legal Interactive track and used the same process as last year except that this year we used three different human operators as opposed to only one as UW did last year. We participated in three topics: 301, 302, and 303. Relative to other participants, we performed well on one of the three topics. For two of the topics, low reca...

We investigated the preparation of CMB (cobalt-manganese-bromide) and CMA (cobaltmanganese-acetate) liquid catalysts as petroleum liquid catalysts by simultaneously recovering Co and Mn from spent Li-ion battery cathode material. To prepare the liquid catalysts, the total preparation process for the liquid catalysts consisted of physical pre-treatments, such as grinding and sieving, and chemica...

Solvent extraction (SX) separation of Al from Ni sulphate leach liquor (LL) of spent Raneynickel catalyst containing 0.12 M Al and 1.448 M Ni using organophosphorus extractants has been investigated. Optimization of process conditions includes aqueous pH, extractant concentration, phase ratio, and stripping. Comparison of Al extraction efficiency with 0.45 M extractant concentration for TOPS 99...

This case examines the business development and strategic expansion of Greenway Medical Technologies, a software company delivering electronic healthcare solutions to physicians operating small practices. Over a period of seven years and with an investment of $70 million, Greenway built a best-in-class software application. The case also describes the electronic medical record systems industry ...

I t has recently been observed that many weeks after injection of small amounts of antigen, removal of ant ibody from the circulation results in a specific, secondary-type, ant ibody response (1, 2). This observation suggests that a dynamic equilibrium between persisting immunogen and circulating antibody regulates the immune response (3), and further, that immunocompetent cells can capture ant...

Icariin is recognized as the major bioactive component of Herba Epimedii. The aim of this study was to evaluate the anti-fatigue properties of icariin using a weight-loaded forced swimming test. The mice were randomly divided into four groups, a control group and three icariin treatment groups. The icariin treated groups received different doses of icariin per os (100, 200 and 400 mg/kg of body...