نتایج جستجو برای: chemical element
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Na2[MO4(OH)2], where M = Ru, Os, and Hs (element 108) V. Pershina and J. V. Kratz *GSI, Darmstadt **Institut für Kernchemie, Universität Mainz Recent experiments on the chemical identification of element 108, Hs, have delivered straightforward evidence that it belongs to group 8 of the Periodic Table [1]. In the presence of oxygen, Hs formed HsO4 which was deposited in a gas-phase chromatograph...
During the last 15 years a lot of effort has been invested in the experimental investigation of the chemical behaviour of superheavy elements. One was able to show that the general feature of the elements 104 to 108 is to follow the trend of the continuation of the Periodic Table [1]. Details of the experimental methods and results can be found in the recent review by Schädel [2]. These element...
The U.S. Chemical Safety Board (CSB), an independent, non-regulatory federal agency that investigates the root causes of major chemical incidents, has firstly analyzed safety culture as important element to maintain process in investigation report “BP America Refinery Explosion” 2007. On same year, Center for Process (CCPS) published Risk Based (RBPS) which was newly added element. author found...
Calcium is an attractive material for the negative electrode in a rechargeable battery due to its low electronegativity (high cell voltage), double valence, earth abundance and low cost; however, the use of calcium has historically eluded researchers due to its high melting temperature, high reactivity and unfavorably high solubility in molten salts. Here we demonstrate a long-cycle-life calciu...
Trace element speciation of an integrated soil amendment matrix was studied with a modified BCR sequential extraction procedure. The analysis included pseudo-total concentration determinations according to USEPA 3051A and relevant physicochemical properties by standardized methods. Based on the results, the soil amendment matrix possessed neutralization capacity comparable to commercial fertili...
Mouse ODC (ornithine decarboxylase) is quickly degraded by the 26S proteasome in mammalian and fungal cells. Its degradation is independent of ubiquitin but requires a degradation signal composed of residues 425-461 at the ODC C-terminus, cODC (the last 37 amino acids of the ODC C-terminus). Mutational analysis of cODC revealed the presence of two essential elements in the degradation signal. T...
In the present study, consider an influence of chemical reaction on an unsteady MHD free convective, viscous dissipative Casson fluid flow over a vertically inclined plate in presence of magnetic field, heat and mass transfer. The modeling equations are converted to dimensionless equations, then solved through finite element technique. Computations were performed to analyze the behavior of flui...
A gel is an aggregate of polymers and solvent molecules. The polymers crosslink into a three-dimensional network by strong chemical bonds, and enable the gel to retain its shape after a large deformation. The solvent molecules, however, interact among themselves and with the network by weak physical bonds, and enable the gel to be a conduit of mass transport. The time-dependent concurrent proce...
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