منابع مشابه
Martensite phase reversion-induced nano/ ultrafine grained AISI 304L stainless steel with magnificent mechanical properties
Austenitic stainless steels are extensively used in various applications requiring good corrosion resistance and formability. In the current study, the formation of nano/ ultrafine grained austenitic microstructure in a microalloyed AISI 304L stainless steel was investigated by the advanced thermomechanical process of reversion of strain-induced martensite. For this purpose, samples were subjec...
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We studied the properties of two morphologically reverted cell clones isolated as chromosomal segregants from a "hybrid" clone of BHK 21/13 hamster fibroblasts, transformed with polyoma virus. Both clones were less tumorigenic than control transformed cells. They contained no detectable polyoma-specific complement-fixing antigen. Induced transplantation antigen also appeared to be lost or reduc...
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Excision of transposable genetic elements from host DNA is different from the classical prophage lambda type of excision in that it occurs at low frequency and is mostly imprecise; only a minority of excision events restores the wild-type host sequences. In bacteriophage Mu, a highly efficient transposon, imprecise excision is 10-100 times more frequent than precise excision. We have examined a...
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The occurrence in 6 patients of premature ventricular beats before reversion to sinus rhythm, after the intravenous administration ofverapamil-for the treatment of supraventricular tachycardia, is reported. Four patients had pre-excitation syndromes (Wolff-Parkinson-White in I and Lown-Ganong-Levine in 3) and one patient had bradycardia-tachycardia syndrome. In the remaining patient, at previou...
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From the spot prices we have to identify the following six parameters: α , μ, σ, Km , γ, Φ. If necessary, a seventh parameter, λ, should be identified from the futures prices. The six parameters mentioned above can be identified using the maximum likelihood method (Ball and Torous, 1983; Lien and Strom, 1999; Clewlow and Strickland, 2000) or the moments method (Lien and Strom, 1999; Deng, 1999)...
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ژورنال
عنوان ژورنال: Science
سال: 1909
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.30.764.241