منابع مشابه
metallicity of starburst galaxies in chandra deep field south (cdf-s) , at 0.5
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15 صفحه اولExperimental Study on Diesel Exhaust Particles Agglomeration Using Acoustic Waves
Diesel exhaust particles are a complex mixture of thousands of gases and fine substances that contain more than 40 different environmental contaminants. Being exposed to these exhaust particles (called soot) can cause lung damage and respiratory problems. Diesel particulate filters are used in many countries for mobile sources as a legal obligation to decrease harmful effect of these fine pa...
متن کاملExperimental investigation of minimum fluidization velocity of micron size particles in presence of an acoustic field
The fluidization behavior of silica gel was tested in a fluidized bed under different sound pressure levels and sound frequencies. It has been found that the particle mixtures can be fluidized smoothly with sound assistance at low sound frequency owing to the sound energy disrupting large size of agglomerates. The minimum fluidization velocity was found to decrease with increasing sound frequen...
متن کاملLiquid Crystals in Tribology
Two decades ago, the literature dealing with the possible applications of low molar mass liquid crystals, also called monomer liquid crystals (MLCs), only included about 50 references. Today, thousands of papers, conference reports, books or book chapters and patents refer to the study and applications of MLCs as lubricants and lubricant additives and efforts are made to develop new commercial ...
متن کاملAcoustic Vibrations in Nanosized Gold-Shell Particles
We demonstrate and discuss acoustic vibrations in spherical shell particles. The particles consist of 38-nm-thick gold shells, sandwiched between an inner silica core of 456 nm in diameter and an outer silica shell of 10 nm in thickness. Employing standard and asynchronous optical sampling (ASOPS) ultrafast pump-probe experiments, we excite acoustic vibrations of the shells and detect the oscil...
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ژورنال
عنوان ژورنال: Ultrasound
سال: 2011
ISSN: 1392-2114
DOI: 10.5755/j01.u.66.3.653