asymmetric membranes are widely used in many industrial membrane separation processes. the major advantage of membrane filtration over the conventional process is its ability to remove a wider spectrum of particles without using any chemicals. hollow fiber configuration offer many advantages over flat-sheet or tubular membranes. the spinning process of hollow fiber may look simple, yet it is te...

Introduction: Today, due to the increasing demand for health services and the increase in health care costs, it is necessary to pay attention to cost management in hospitals. The present study was conducted with the aim of developing and psychometric "Hospital Cost Management Scale". Methods: The present research method is a combined (qualitative-quantitative) method. In the qualitative section...

in this thesis, a new optically active poly(amide-imide) (pai) was synthesized by the indirect polycondensation reaction of the l-phenylalanine based diacid chloride and 4,4?-diaminodiphenylether in the presence of triethylamine in n-methyl-2-pyrrolidone. the formation of pai was confirmed by ftir, 1h nmr and elemental analysis. in next step, the surface of titanium dioxide (tio2) nanoparticles...

Objective In Iran, the tariffs’ book of “Relative Values of Health Services” is the basis ‎for calculating the costs of health services. Since orthopedic surgery is one of the largest fields of surgery ‎in which most body tissues are involved, coding orthopedic procedures is more difficult. The present study aims to investigate the problems of coding orthopedic ‎procedures using the Tariffs’ bo...

the present study aimed to investigate the possible effects of focused highlighted error feedback on grammatical accuracy of writing among iranian intermediate efl learners. after selecting 52 homogenous participants from among 70 university students attending azad university of rasht and randomly dividing them into two intact groups of 26 students, the researcher exposed the participants of th...