نتایج جستجو برای: chemical separation
تعداد نتایج: 493930 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,...
Introduction: Water-fat separation is of interest in several MRI applications including fat suppression and fat quantification. Chemical shift imaging allows robust water-fat separation [1, 2], however the acquisition of multiple images results in prolonged scan time. Accelerated water-fat separation using compressed sensing (CS) was partly addressed in [3] by considering the separation as a sp...
Airflow-enhanced evaporation is investigated as a method for rapid chemical preconcentration on a thin porous substrate. The mechanism is described by combining 1D models of capillary rise, chromatography, and pervaporation concentration. It is shown that the effective length of the column can be shorter than its actual length, allowing concentrate to be held at a stagnation point and then rele...
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PURPOSE To integrate water-fat-resolved spiral gradient-echo imaging with off-resonance correction into a clinical MR scanner and to evaluate its basic feasibility and performance. MATERIALS AND METHODS Three-point chemical shift imaging was implemented with forward and strongly T(2)*-weighted reverse spiral sampling and with off-resonance correction after water-fat separation. It was applied...
INTRODUCTION Quantitative water/fat separation in MRI requires careful modeling of the acquired signal. Multiple signal models have been proposed in recent years, but their relative performance has not yet been established. This abstract presents a comparative study of 12 signal models for water/fat separation. The models were selected according to three criteria: magnitude or complex fitting [...
Many diffusion-ordered spectroscopy (DOSY) NMR techniques have recently been developed to aid in the deconvolution of complex mixtures. Spectroscopic separation based on chemical and physical properties facilitates the identification of mixture components while eliminating time-consuming separation steps and preserving the chemical environment. One way to improve resolution in such experiments ...
Oxygen is one of the most important products in chemical industries. This chemical element is used in various processes such as: refinery industries, manufacturing metal and other industrial operations. For instance, oxygen with high purity is utilized in different chemical processes like: steel construction, paper industries, wastewater treatment and glass production. In 1907, oxygen was produ...
Chemical separation has great importance in industrial applications. Separation of xylene isomers still prevails to be one of the most important challenges in chemical industry, due to the large amount of commercial use of p-xylene in the production of beverage bottles, fibers and films. A novel Zn(II)-based dynamic coordination framework based on flexible ether-linkage, exhibiting selective ad...
In this research, Effect of thermal treatment on beneficiation of low-grade laterite nickel by calcination-magnetic separation method was studied. In order to determine the components and elements of the sample, to recognize the main and minor minerals and their bond, and phase transformation caused by thermal treatment, Chemical analysis (XRF and ICP), microscopic studies and XRD analysis ...
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