نتایج جستجو برای: chemical element
تعداد نتایج: 575159 فیلتر نتایج به سال:
CHEM-SHE-01 On the production and chemical separation of Hs (element 108) 183 Experiment Proposal Number: U205 Authors: Dvorak, J.; Krücken, R.; Nebel, F.; Novackova, Z.; Türler, A.; Wierczinski, B.; Yakushev, A.; Brüchle, W.; Jäger, E.; Schimpf, E.; Schädel, M.; Semchenkov, A.; Kuznetsov, A.; Chelnokov, M.; Yeremin, A.; Düllmann, C. E.; Nagame, Y.; Eberhardt, K.; Thörle, P.; Dressler, R.; Qin,...
It is well known that when chemical reactions occur, the masses of the participating molecules are not conserved, whereas the masses of the nuclei of the chemical elements constituting these same molecules, are conserved. Within the context of non-equilibrium thermodynamics, the first fact is expressed by the differential balance equations, for the densities of the chemically reacting molecules...
The heaviest element identified chemically is Z=112. Using the gas-phase thermochromatography technique, its volatility, i.e., the adsorption enthalpy, ∆Hads, on gold plated detectors located along the chromatography column was investigated and compared to that of Hg [1]. Very recently, results of the first chemical studies on element 114 using the same technique were reported [2,3]. Both eleme...
titanium and its alloy are known as important load-bearing biomaterials. the major drawbacks of these metals are fibrous formation and low corrosion rate after implantation. the surface modification of biomedical implants through various methods such as plasma spray improves their osseointegration and clinical lifetime. different materials have been already used as coatings on biomedical implan...
platinum is a metallic element, which may react with our cellular component through its involvement in cancer chemotherapy medications. cisplatin is one of the most useful antineoplastic drugs against human ovarian carcinoma, which has the central element of platinum in its structure. the nature of chemical interaction between platinum and cellular macromolecules is yet to be understood. we exa...
Around 2 × 103-2.5 × 103 million years ago, a unicellular organism with radically novel features, ancestor of all eukaryotes, dwelt the earth. This organism, commonly referred as the last eukaryotic common ancestor, contained in its proteome the same functionally capable ubiquitin molecule that all eukaryotic species contain today. The fact that ubiquitin protein has virtually not changed durin...
35 Chemical sensors consist of a recognition element that is sensitive to stimuli produced by various chemical compounds (analyte) and a transduction element that generates a signal whose magnitude is functionally related to the concentration of the analyte. Chemical sensors also include a special branch referred to as biosensors for the recognition of biochemicals and bio-reactions. The use of...
The distribution of elements in sauropod humeri and femora was determined by micro-X-rayfluorescence analysis (μ-XRF). Element distribution maps enable correlations between bone architecture and spatial distribution of the chemical elements. The investigations reveal no significant macroscopic gradients in the element distribution across the fossil bone cross-section. More detailed investigatio...
Abstract:The two point boundary value problems with Neumann and mixed Robbin’s boundary conditions have great importance in chemical engineering, deflection of beams etc. It is not easy task to solve numerically such type of problems. In this paper, Galerkin-finite element method is proposed for the numerical solution of the boundary value problem having mixed Robbin’s and Dirichlet’s condition...
We present a new method for the decomposition of an experimental absorbance matrix into concentration and molar absorption coefficient matrices. The decomposition in general is not unambiguous; therefore, the method may yield only ranges for these matrices. The experimental matrix is not changed, so deviations from the original data can be monitored element by element. Consequently, all chemica...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید