The present paper explores the impact of an on-board hydrogen harvesting system (fuel reformer) on the overall efficiency of a fuel-cell powered vehicle. Various methods of hydrogen production for automotive applications have been discussed first. As the hydrogen production is one of the major challenges for application of proton exchange membrane (PEM) fuel cells, especially in vehicular indus...

A simple and reproducible HPLC method with spectrophotometric detection was developed for determination of rivastigmine in human plasma. Liquid-liquid extraction of rivastigmine and donepezil (as internal standard) from plasma samples was performed with 1-butanol/n-hexane (2:98 v/v) in alkaline condition followed by back-extraction into diluted acetic acid. Chromatography was carried out using ...

Production of antihydrogen atoms by mixing antiprotons with a cold, confined, positron plasma depends critically on parameters such as the plasma density and temperature. We discuss nondestructive measurements, based on a novel, real-time analysis of excited, low-order plasma modes, that provide comprehensive characterization of the positron plasma in the ATHENA antihydrogen apparatus. The plas...

background: fetal dna in maternal plasma and serum has been shown to be a useful material for prenatal fetal sex determination during early gestational ages. non-invasive prenatal diagnosis is now possible at 8th week of pregnancy, by maternal blood sample testing. objective: the purpose of this study was to evaluate two dna extraction methods from mother plasma and its routine clinical applica...

Blood plasma separation from undiluted blood is an essential step in many diagnostic procedures. This study focuses on the numerical optimization of microfluidic separator (BPS) and experimental validation results to achieve portable with high purity reasonable yield. The proposed design has two parts: a microchannel for processing tank below aforementioned main channel collection. uses 3D comp...

a simple, rapid and sensitive high-performance liquid chromatographic (hplc) method for the determination of risperidone in human plasma was developed. an hplc system based on a nucleosil c8 column (150?4 mm) and a uv detector (?= 280 nm) were used. a mixture of sodium dihydrogen phosphate buffer-acetonitrile (55:45, v/v) adjusted to ph 6.0 at a flow rate of 1.5 ml min-1 was used as mobile phas...

objective(s) the purpose of the present study was to evaluate the effect of ramadan fasting and weight-lifting training on plasma volume, glucose, and lipids profile of male weight-lifter. materials and methods forty male weight-lifters were recruited and divided into 4 groups (n=10 each) and as the following groups: control (c), fasting (f), training (t) and fasting-training (f-t). the t and f...

background activation of stress response during cardiac surgeries such as cardiopulmonary bypass (cpb) can increase myocardial oxygen demand and consumption through induced tachycardia and augmented peripheral vascular resistance. these physiologic consequences may lead to increased morbidity and mortality by putting too great a strain on the already compromised organ systems. material and meth...