نتایج جستجو برای: some gases
تعداد نتایج: 1350999 فیلتر نتایج به سال:
When looking at the effects of diesel engine exhaust on the environment, it is important to first look at the composition of the exhaust gases. Over 99.5% of the exhaust gases are a combination of nitrogen, oxygen, carbon dioxide, and water. With the exception of carbon dioxide, which contributes about 5% of the total volume, the diesel engine exhaust consists of elements which are part of...
Background: Some operating room personnel are occupationally exposed to genotoxic agents such as anesthetic gases and ionizing radiation. Adaptive response, as a defense mechanism, will occur when cells become exposed to a low dose of factors harming DNA (priming dose), which in the subsequent exposure to higher dose of those factors (challenging dose), show more resistance and sensibility.. <b...
Introduction Dissolved gases,with dissolved oxygen serving as the primary marker,have been widely documented to influence dissolution experiments. The dissolved gases can cause changes in the performance of the dissolution medium by changing pH,forming bubbles on the dosage form or altering the interaction of the medium and the active pharmaceutical ingredient [1]. Extensive studies have been p...
Amounts of source gases with stratospheric sinks (CFCs, N2O, CH4) are affected by changes in Brewer–Dobson circulation. Source gases and their degradation products are important for atmospheric chemistry and climate. With a simple model, we examine how amounts and lifetimes of source gases and products depend on speed of the circulation. Transient results differ from steady-state and stratosphe...
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