نتایج جستجو برای: metal melting
تعداد نتایج: 222752 فیلتر نتایج به سال:
Mixed ligand complexes of bivalent metal ions, viz; Co(II), Ni(II), Cu(II) and Zn(II) of the composition (ML1L2) in 1:1:1 molar ratio, (where L1=diphenylamine-2-mercapto-2’-carboxylic acid (DPMC) and L2=2-furyl glyoxalanthranilic acid (FGAA) have been synthesized and characterized by repeated melting point determination, elemental analyses, IR, H-NMR, magnetic susceptibility measurements and el...
We investigate the mechanisms of the nonmetal-metal transitions of Se and Te induced by the volume compression both in the solid and liquid states by the density functional method. The volume compression increases the band width and the system transforms from nonmetal to metal phase both in the crystalline Se and Te. When the system has structural disorder, the energy of the anti-bonding level ...
Aluminum nanocontact conductance histograms are studied experimentally from room temperature up to near the bulk melting point. The dominant stable configurations for this metal show a very early crossover from shell structures at low wire diameters to ionic subshell structures at larger diameters. At these larger radii, the favorable structures are temperature-independent and consistent with t...
In this article, a 3D finite element simulation of a material accumulation process based on rod end and blank end melting is discussed. This process represents the first step of a two-level cold forming process in microrange and can be modeled mathematically by coupling the Stefan problem with the Navier-Stokes equations including a free capillary surface. Numerical results for melting the tip ...
Introduction: During the past 30 years, the melting methods and associated molten metal-handling systems used by the U.S. foundry industry have changed significantly. During the same period, while ductile iron production has experienced continued growth, the quality of metallic scrap and other ironunit feed stocks has steadily deteriorated. The result: slag related melting problems have become ...
We report the thermal stability of wild type (WT) and 14 different variants of human copper/zinc superoxide dismutase (SOD1) associated with familial amyotrophic lateral sclerosis (FALS). Multiple endothermic unfolding transitions were observed by differential scanning calorimetry for partially metallated SOD1 enzymes isolated from a baculovirus system. We correlated the metal ion contents of S...
We describe here a short and efficient synthetic route for incorporating terpyridine based metal complexes at the 3'-extremity of both single and bis-oligonucleotide (bis-ODN) stretches to form novel metal complex-ODN conjugates. All single stranded mono and bis-ODN tethered metal complexes and the respective duplex ODNs were characterized by circular dichroism spectroscopy and UV-Vis melting e...
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