نتایج جستجو برای: chemical absorption
تعداد نتایج: 499616 فیلتر نتایج به سال:
A rapid progress in the theoretical developments based on modulations of absorption cross section due to single and multiple scattering of an electron emitted from an inner shell by X-rays impinging on the target atom to understand the EXAFS and XANES in recent years and harnessing of the highly powerful synchrotron radiation source for the X-rays have bestowed immense capability on X-ray absor...
چکیده ندارد.
Low intensity ultrasound (approximately 10(-6) W cm-2) in the frequency range 0.5-6.0 MHz was employed to investigate the ultrasound absorption properties of doxorubicin (DOX) at several temperatures. At physiological temperatures, we found enhanced ultrasound absorption from DOX, and its closely related analogue daunorubicin (DNR), in the upper kilohertz frequency range. The findings do not co...
Introduction: In Iran country, there is a lack of reliable data on acoustic characteristics of building materials applied in the offices and industrial rooms. This study aimed to investigate noise absorption characteristics for current building and acoustics materials and provided the acoustic database. Method: In this cross sectional study, the minimum of 60 building and acoustic mate...
The capabilities and applicability of the radiotracer technique for methodological studies in hydride generation and electrothermal atomic absorption spectrometry are discussed and demonstrated by using several selected examples. It is shown that, for studying chemical and physico-chemical aspects of atomic absorption spectrometric methods, the radiotracer technique is superior to other techniq...
Addition of EDTA to the KDP solution is an effective method to increase the stability zone and the crystal growth rate. EDTA neutralizes the chemical activity of metal ions impurity such as Al+3, Fe+3, Cr+3 (that exist in the chemical materials as impurity). Effect of Al+3, Fe+3, Cr+3 ions on the KDP crystal is investigated. Growth method was based on the “point seed” method following spontaneo...
Reactive absorption — i.e., the absorption of gases in liquid solutions accompanied by chemical reactions — is an important industrial operation for the production of basic chemicals (e.g., sulfuric or nitric acid) and for the removal of harmful substances (e.g., H2S) from gas streams. In recent decades, this process has become especially important for the purification of gases to high purities...
Transmission X-ray microscopy (TXM) is a rapidly developing technique with the capability of nanoscale three dimensional (3D) real-space imaging. Combined with the wide range in energy tunability from synchrotron sources, TXM enables the retrieval of 3D microstructural information with elemental/chemical sensitivity that would otherwise be inaccessible. The differential absorption contrast abov...
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