the present study was undertaken to compare the in hospital results of coronary artery bypass graft (cabg) with (on pump) or without (off pump) cardiopulmonary bypass (cpb). data were collected on all first-time isolated cabgs with saphenous vein and/or artery grafts at shahid madani hospital in tabriz-iran, between 2006 and 2009. age and clinical profile were marched between on pump and off pu...

The fate of hydrocarbons in the subsurface near Bemidji, Minnesota, has been investigated by a multidisciplinary group of scientists for over a quarter century. Research at Bemidji has involved extensive investigations of multiphase flow and transport, volatilization, dissolution, geochemical interactions, microbial populations, and biodegradation with the goal of providing an improved understa...

The exponential increase of plastic production produces 100 million tonnes of waste plastics annually which could be converted into hydrocarbon fuels in a thermal cracking process called pyrolysis. In this research work, a direct current (DC) thermal plasma circuit is designed and used for conversion of low density polyethylene (LDPE) into diesel oil in a laboratory scale pyrolysis reactor. The...

Slugging flow in offshore oil & gas multi-phase transportation pipelines cause big challenges as the flow regime induces flow and pressure oscillations in the multi-phase pipelines. The negative impacts of the most severe slugs are significant and thus the elimination of slugging flow in the pipelines is a highly investigated topic. To eliminate the slug in an online manner real-time slug detec...

Biodiesel is a promising non-toxic and biodegradable alternative fuel used in the transport sector. Nevertheless, the higher viscosity and density of biodiesel poses some acute problems when it is used it in unmodified engine. Taking this into consideration, this study has been focused towards two objectives. The first objective is to identify the effect of temperature on density and viscosity ...

INTRODUCTION Intramural oesophageal dissection (IOD) is a rare clinical condition and there is a paucity of information regarding the appropriate diagnosis and management. It is described as bleeding in the submucosal plane of the oesophagus, and has various documented causes. PRESENTATION OF CASE We report a case of a 73 year old female who developed IOD. She presented with severe chest pain...

According to the working principle of A10VNO swashplate axial piston pump, output flow model an pump in ideal state and theoretical considering leakage distribution process are established. The pulsations odd even pumps simulated analyzed by Matlab, influence a closed dead angle mismatch port plate on pulsation is obtained. Based model, AMESim used establish overall leakage, oil compressibility...

The end clearance and radial of the gear pump are most important factors affecting its internal leakage viscous friction loss, also total efficiency a high-speed pump. reasonable value is decisive condition for high-efficiency performance pumps. Based on certain type with speed 6000 r/min, influence loss analyzed under rated working outlet pressure 8 MPa. flow field simulation model oil flowing...

background: it is well documented that coronary artery bypass grafting (cabg) with cardiopulmonary bypass (cpb) causes ischemia and oxidative stress of the whole body. to compare the effect of on – pump and off –pump cabg on the induction of the oxidative stress and the metabolism of homocysteine which is involved in the synthesis of glutathione was investigated in the cabg patients during the ...