نتایج جستجو برای: flat tubes

تعداد نتایج: 85384  

Journal: :international journal of reproductive biomedicine 0
leili hafizi mostafa gholizadeh mohammad karimi golkoo hosseini hesam mostafavi-toroghi mehdi haddadi

background: magnetized water has made many improvements in industry, agriculture and medicine. however its utilization in medicine still remains controversial. objective:  in this study we aimed to investigate the effects of magnetized water on height of epithelial cells in pre-implantation stage endometrium and fallopian tube and number of corpus lutea in female mice. materials and methods:  e...

Journal: :journal of membrane science and research 0
gohar gholami department of chemical engineering, amirkabir university of technology, no.424, hafez ave., po box 15875-4413, tehran, iran mansooreh soleimani department of chemical engineering, amirkabir university of technology, no.424, hafez ave., po box 15875-4413, tehran, iran maryam takht ravanchi catalyst research group, petrochemical research and technology company, national petrochemical company, tehran, iran

carbon molecular sieve membranes (cmsms) have been considered as very promising candidates for gas separation, in terms of separation properties as well as thermal and chemical stability. due to the numerous advantages and wide applications of carbon membranes, their application for gas separation is of special importance. because of the importance of carbon membranes and a large number of stud...

Journal: :journal of membrane science and research 0
nayef ghasem department of chemical & petroleum engineering, uae university, al-ain city, united arab emirates mohamed al-marzouqi department of chemical & petroleum engineering, uae university, al-ain city, united arab emirates

comin the present study, co2 removal from natural gas stream has been studied using a flat sheet membrane contactor. a three dimensional mathematical model is developed to describe the process. the model considers the transport of a gas mixture containing carbon dioxide and methane through a flat sheet membrane contactor module. the model is based on the non-wetted mode of operation, in which t...

Journal: :فصلنامه علمی پژوهشی مهندسی مکانیک جامدات واحد خمینی شهر 0
masoud zadkhast msc student, department of mechanical engineering, najafabad branch, islamic azad university, isfahan, iran davood toghraee assistant professor, department of mechanical engineering, khomeinishahr branch, islamic azad university, isfahan, iran arash karimipour assistant professor, department of mechanical engineering, najafabad branch, islamic azad university, isfahan, iran

this work presents a model for calculating the effective ‎thermal conductivity of nanofluids. the proposed model ‎includes the effects of nanoparticles and thermal conductivity ‎base fluid.we will focus on experimental of the volume ‎concentration parameter and temperature on thermal ‎conductivity, nano-fluid combination and multi-walled ‎carbon nanotubes-oxide / copper-paid deionized water. th...

Journal: :فصلنامه علمی پژوهشی مهندسی مکانیک جامدات واحد خمینی شهر 0
gholamreza mazruei graduate student, faculty of mechanical engineering, islamic azad university of khomeini shahr ali heidari assistant professor, young researchers and elite club, khomeinishahr branch, islamic azad university, khomeinishahr, iran

in this study, a new method for joining aluminum tubes in subsurface structures using steel converting and aluminum welding are presented and reviewed. but near the weld area is under high thermal cycle and will cause residual stresses in heat affected zone. therefore for assessment of proposed connection from the perspective of residual stress by using the finite element method welding of tube...

Journal: :iran agricultural research 2008
m. majzoobi a. farahnaky r. ostovan

there are many reports on the application of different hydrocolloids in the production of leavened breads; most of which show positive effects on bread quality. however, there is little information to prove such effect on flat breads. the main aim of this study was to improve the quality of barbari dough and bread (iranian flat bread) in terms of texture, taste and general acceptability of fres...

Journal: :iranian journal of science and technology (sciences) 2008
n. sadegh-zadeh

the main objective of this paper is to find the necessary and sufficient condition of a given finslermetric to be einstein in order to classify the einstein finsler metrics on a compact manifold. the consideredeinstein finsler metric in the study describes all different kinds of einstein metrics which are pointwiseprojective to the given one. this study has resulted in the following theorem tha...

Journal: :bulletin of the iranian mathematical society 0
m. soleimani-damaneh {school of mathematics‎, ‎statistics and computer science‎, ‎college of science‎, ‎university of‎ ‎tehran‎, ‎enghelab avenue‎, ‎tehran‎, ‎iran. m. movahedi department of mathematics‎, ‎faculty of sciences‎, ‎alzahra university‎, ‎tehran‎, ‎iran. d. behmardi department of mathematics‎, ‎faculty of sciences‎, ‎alzahra university‎, ‎tehran‎, ‎iran.

in this paper, we deal with the subdi erential concept onhadamard spaces. flat hadamard spaces are characterized, and nec-essary and sucient conditions are presented to prove that the subdif-ferential set in hadamard spaces is nonempty. proximal subdi erentialin hadamard spaces is addressed and some basic properties are high-lighted. finally, a density theorem for subdi erential set is establi...

Journal: :British journal of anaesthesia 1978
D J Hatch

The dimensions of tracheal tubes and connectors in common use were measured together with the resistance to breathing at flow rates occurring in babies breathing quietly. The outside diameters of rubber tubes varied more than those of plastic tubes. The main factors influencing resistance were the internal diameter and a sudden change in diameter or direction of flow. These are of particular im...

Journal: :acta medica iranica 0
ata mahmoodpoor department of anesthesiology and intensive care, general icu, shohada hospital, faculty of medicine, tabriz university of medical sciences, tabriz, iran. ali peyrovi-far department of anesthesiology and intensive care, general icu, shohada hospital, faculty of medicine, tabriz university of medical sciences, tabriz, iran. hadi hamishehkar department of clinical pharmacy, faculty of pharmacy, tabriz university of medical sciences, tabriz, iran. zhaleh bakhtyiari department of anesthesiology and intensive care, general icu, shohada hospital, faculty of medicine, tabriz university of medical sciences, tabriz, iran. mir mousa mirinezhad department of anesthesiology and intensive care, general icu, shohada hospital, faculty of medicine, tabriz university of medical sciences, tabriz, iran. masoud hamidi department of anesthesiology and intensive care, general icu, shohada hospital, faculty of medicine, tabriz university of medical sciences, tabriz, iran.

because microaspiration of contaminated supraglottic secretions past the endotracheal tube cuff is considered to be central in the pathogenesis of pneumonia, improved design of tracheal tubes with new cuff material and shape have reduced the size and number of folds, which together with the addition of suction ports above the cuff to drain pooled subglottic secretions leads to reduced aspiratio...

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