نتایج جستجو برای: gas forming
تعداد نتایج: 354238 فیلتر نتایج به سال:
We present adaptive optics assisted integral field spectroscopy of nine Hα-selected galaxies at z=0.84–2.23 drawn from the HiZELS narrow-band survey. Our observations map the kinematics of these star-forming galaxies on ∼ kpc-scales. We demonstrate that within the ISM of these galaxies, the velocity dispersion of the star-forming gas (σ) follows a scaling relation σ ∝ Σ SFR + constant (where ΣS...
Pneumocephalus is defined as "the presence of air or gas within the cranial cavity" [1] , but no distinction is made between localized and diffuse gas collections . We report a case of diffuse pneumocephalus caused by the gas-forming organism Clostridium perfringens. To the best of our knowledge, this is the first demonstration of diffuse pneumocephalus associated with Clostridium meningitis an...
light-weight and high strength alloys such as al-mg alloys are used in order to reduce the weight of industrial components. however these materials should be formed at elevated temperatures due to their poor formability at room temperature. hot metal gas forming is one of the high-tech forming processes that is used to solve this problem. recent investigation on tube hydroforming showed positiv...
We review the Lyα emission in local star-forming galaxies. In most cases as already shown by the IUE, the emission is absent or much weaker than expected. This occurs because Lyα photons can be resonantly scattered by the neutral gas and destroyed by even very low amounts of dust. However new Hubble Space Telescope observations (HST) indicate that other factors such as the velocity structure of...
Vacuum physics is the necessary condition for scientific research and modern high technology. In this introduction to the physics and technology of vacuum the basic concepts of a gas composed of atoms and molecules are presented. These gas particles are contained in a partially empty volume forming the vacuum. The fundamentals of vacuum, molecular density, pressure, velocity distribution, mean ...
The correlation between defect structure, metal segregation, and electrical resistivity of indium-tin-oxide nanopowder upon treatment in reducing atmosphere was investigated. Morphology and defect structure have been investigated by in situ synchrotron x-ray diffraction and transmission electron microscopy, while traces of metallic indium have been detected by susceptibility measurements utiliz...
The resurgence of Group A Streptococcus (GAS) infections in the past two decades has been a rising major public health concern. Due to a large number of GAS infections occurring in the skin, mast cells (MCs), innate immune cells known to localize to the dermis, could play an important role in controlling infection. MCs can exert their antimicrobial activities either early during infection, by d...
A few extremely halophilic Archaea (Halobacterium salinarum, Haloquadratum walsbyi, Haloferax mediterranei, Halorubrum vacuolatum, Halogeometricum borinquense, Haloplanus spp.) possess gas vesicles that bestow buoyancy on the cells. Gas vesicles are also produced by the anaerobic endospore-forming halophilic Bacteria Sporohalobacter lortetii and Orenia sivashensis. We have extensive information...
An ultracold Fermi gas with repulsive interaction has been studied. For weak interactions, the atomic gas is metastable, and the interactions were characterized by obtaining the isothermal compressibility from atomic density profiles. For stronger interactions (kFa 1), rapid conversion into Feshbach molecules is observed. When the conversion rate becomes comparable to the Fermi energy divided...
اکثر خطوط لوله انتقال gas-condensate در مناطق نفت خیز ایران، دارای قطر زیاد و تحت فشار بالا، درخارج از محدوده شرایط به کار رفته درایجاد مدل های دوفازی موجود می باشند. مدلهای فعلی، عموما براساس اطلاعات تجربی بدست آمده از لوله های کم قطر، در فشارهای پایین و تحت شرایط آزمایشی با مقدار مایع بیش از 10 ارائه گردیده اند. و به دلیل آنکه میزان مایع جمع شده در خطوط انتقال گاز و یا gas-condensate کمتر ازا...
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