Nowadays Heat pump water heater becomes a very hot topic in hot water industry. However it has many problems because of higher condensing temperature and large-scale operation conditions. Based on the problems, this paper presents a prototype which was assembled using a rotary compressor with refrigerant injection port. By making use of the liquid injection function of the compressor, the syste...

Plastic injection is a method in which, with using an extruder in granules, plastic is injected in a hole with high pressure. Because of meeting the two flow fronts in this process welding line will be made. Along the welding line the strength of produced part is low; therefore the position of welding line and its clarity are very important. In this paper, analyzes have been done with Fluent an...

nanotechnology has the potential to introduce revolutionary changes to several areas of oil and gasindustry such as exploration, production, enhanced oil recovery, and refining. in this paper, the effectof different concentrations of fe2o3 nanoparticles as a catalyst on the heavy oil viscosity at varioustemperatures is studied. furthermore, the effect of a mixture of fe2o3 nanoparticles and ste...

gravity drainage is one of the important recovery mechanisms in fractured carbonate and conventional reservoirs. it occurs due to density difference between the gas in fracture and the oil in matrix as well as in conventional tilted reservoirs. oil phase will form films which are produced under gravity forces (film flow). many gas injection experiments have been done on laboratory scales with d...

the objective of this study was to compare the effectiveness of various combination activators of bovine oocyte following intracytoplasmic sperm injection (icsi) in terms of cleavage and embryo development. bovine icsi oocytes were treated with a variation of treatments of combined or single activators as follows; 30 v for 15 x 2 μsec of electrical pulse +10 μg/ml cycloheximide (chx),7% ethanol...

background: vesicoureteral reflux (vur) is a common condition among children. although, subureteral injection is a minimally invasive new method for vur treatment, ideal bulking agent in endoscopic treatment still remains controversial. we aimed to evaluate vantris subureteral injection efficacy in vur treatment in pediatric patients. materials and methods: all patients who referred to imam kho...

introduction: ghrelin, increases food intake, decreases t3 and t4 concentrations and stimulates insulin release, while leptin reduces food intake and suppresses appetite. considering the importance of thyroid hormones, ghrelin and leptin in body metabolism, the purpose of this study was to investigate the effect of interactions between ghrelin and leptin (injected via icv route) and plasma t3 a...

conclusions the major risk factor of hcv infection was injection drug use. the patient’s awareness of his or her hcv status had a minor effect in reduction of illicit drug use and improvement in mmt retention. therefore, adequate counseling is necessary for drug users in mmt clinics in xi’an. background hepatitis c virus (hcv) infection rates in drug users vary among different regions of china....

objective: the study aimed to determine the relationship between presence of antiphospholipid antibodies (apls) and clinical pregnancy rate in patients undergoing ivf/icsi procedures. materials and methods: this descriptive-analytic study performed on two hundred consecutive women referred for ivf/icsi in vali-e-asr reproductive health research center. serum levels of apls , anticardiolipin [ac...