نتایج جستجو برای: seeping of gases
تعداد نتایج: 21167542 فیلتر نتایج به سال:
introduction: following thoracic and abdominal surgery, all patients experience a decrease in pulmonary volumes and atelectasis. different methods are suggested for improvement of pulmonary volumes and blood gas parameters in these patients. in this study the effects of spirometry on pulmonary volumes and blood gases parameters (abg) in coronary artery bypass patients, were examined. materials...
landslides are natural disasters that annually inflict great damages to public and private properties which may associate with loss of life. in recent decades, research on developing methods for predicting the time of landslide has been one of the significant attempts made by scientists. since in some type of material, landslides are preceded by undetectable movements that cannot be recorded an...
In this paper, the Radiation Transfer Equation(RTE) for a non-gray gas between two large parallel planes has been solved and the temperature distribution obtained. With the RTE, solution heat fluxes are also determined. Since and are two components of most combustion products, the problem has been solved for these two gases. The results were, whenever possible, compared with data reported el...
Membranes offer remarkable attributes such as possessing small equipment footprints, having high efficiency and are environmentally friendly, with carbon membranes progressively investigated for gas separation applications. In this study, carbon tubular membranes for CO2 separationare prepared via the dip-coating method with P84 co-polyimide as the carbon precursor. The prepared membranes were ...
Introduction: Anesthetic gases used in hospitals include N2O and halogenated hydrocarbons (such as sevoflurane) which can be released through leakages and uncontrolled exhalation by the patient into the ambient air of clinical staff. These gases have greenhouse effect and damage to the ozone layer and serious risks such as reproductive, preterm delivery and fetal abnormalities and increased spo...
Biotrickling filters (BTFs) are becoming very potential means to purify waste gases containing multiple VOC components, but the removal of the waste gases by BTF has been a major challenge due to the extremely complicated interactions among the components. Four biotrickling filters packed with polyurethane foam were employed to identify the interactions among four aromatic compounds (benzene, t...
one of the current challenges and complications in the world is the climate change and global warming, which has numerous and varied effects and consequences in different regions. in this regard, the effects of economic activities on the increase in greenhouse gases and also the effects of greenhouse gases on economic activities have become increasingly controversial. in this study, an investig...
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