نتایج جستجو برای: trans membrane pressure

تعداد نتایج: 843070  

Journal: :journal of petroleum science and technology 2013
ghasem khatinzadeh mohammad mahdyarfar ali mehdizadeh

the effects of operating parameters such as feed temperature and permeate-side pressure on the performance of a commercial pva membrane in the dehydration of toluene by a pervaporation (pv) membrane system is studied in the present work. the results obtained indicate that increasing temperature in the range of 40 to 70 °c and reducing permeate pressure in the range of 1 to 10 mmhg increase memb...

The effects of operating parameters such as feed temperature and permeate-side pressure on the performance of a commercial PVA membrane in the dehydration of toluene by a pervaporation (PV) membrane system is studied in the present work. The results obtained indicate that increasing temperature in the range of 40 to 70 °C and reducing permeate pressure in the range of 1 to 10 mmHg increase memb...

Journal: :Genetics and molecular research : GMR 2014
W Gao J H Xi N Y Ju G X Cui

Extubation response can lead to cardiovascular and respiratory complications. Here, we aimed to evaluate the effect of ropivacaine injected via the trans-cricothyroid membrane on the extubation response. This prospective, double-blind, randomized study included 70 patients classified as American Society of Anesthesiologists status I-II, who required general anesthesia with nasotracheal intubati...

Ali Asghar Peyvandi, Mohammad Ebrahim Mahdavi,

Background: With respect to physical relations in force and pressure, we hypothesized that the prevalence of traumatic tympanic membrane perforation in patients with a patulous Eustachian tube is greater than normal, because in Eustachian tube patency, the internal air pressure of the middle ear will not increase after compression, subsequent to trauma. Therefore the force upon the tympanic...

This communication demonstrates the relevance of membrane sealing in a test cell to its performance. Membranes need to be sealed, and therefore a more or less signifcant (depending on the test cell design) peripheral part of the membrane is supported directly by the cell body (instead of a permeate spacer). Although it may seem that there should be no fltration through ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Wensi Vennekate Sabrina Schröder Chao-Chen Lin Geert van den Bogaart Matthias Grunwald Reinhard Jahn Peter Jomo Walla

In neurotransmission synaptotagmin-1 tethers synaptic vesicles to the presynaptic plasma membrane by binding to acidic membrane lipids and SNAREs and promotes rapid SNARE-mediated fusion upon Ca(2+) triggering. However, recent studies suggested that upon membrane contact synaptotagmin may not only bind in trans to the target membrane but also in cis to its own membrane. Using a sensitive membra...

Natural gas produced at high pressure (50-70 bar) is the only industrial source of helium (He). A membrane separation process may offer a more efficient production system with smaller footprint and lower operational cost than conventional cryogenic system. Inorganic membranes with high mechanical strength are known to exhibit good stability at high pressure. In this work, two inorganic membrane...

ژورنال: طلوع بهداشت یزد 2016
اسماعیلی, حبیب الله, رحیمی, حمزه, قلیان اول, مهدی, واحدیان شاهرودی, محمد,

Introduction: The high prevalence of hypertension all over the world and serious side effects is a major health problem in all societies. To reduce these effects, control of blood pressure is very important. Regular physical activity is one of the most effective strategies to reduce the risk of some noncommunicable diseases such as cardiovascular. The present study aimed to determine the effect...

Journal: :Water research 2009
L Wang C Albasi V Faucet-Marquis A Pfohl-Leszkowicz C Dorandeu B Marion C Causserand

The rejection of cyclophosphamide (CP) by nanofiltration (NF) and reverse osmosis (RO) membranes from ultrapure (Milli-Q) water and membrane bioreactor (MBR) effluent was investigated. Lyophilization-extraction and detection methods were first developed for CP analysis in different water matrices. Experimental results showed that the RO membrane provided excellent rejection (>90%) under all ope...

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