نتایج جستجو برای: ray fluorescence spectra
تعداد نتایج: 493581 فیلتر نتایج به سال:
Near-infrared, Raman, fluorescence and X-ray fluorescence spectra of multiple soy hydrolysate lots manufactured by different vendors were analyzed for comprehensive characterization of raw materials used in mammalian cell culture processes. The variability of soy hydrolysates, as well as the correlation between multiple spectra and cell culture performance was addressed. The identified composit...
The identification of organic colorants in works of art has traditionally been one of the most difficult challenges in cultural heritage science. While non-invasive methods such as X-Ray fluorescence spectrometry (XRF), or Raman microscopy are extremely useful for the identification of inorganic pigments, they remain generally unsuitable for the analysis of most organic colorants. The absence o...
PURPOSE To measure the attenuation effectiveness and minimize the weight of new non-Pb radiation shielding materials used for radiation protection by interventional radiology (IR) physicians, to compare the accuracy of the different standard measurement geometries of these materials, and to determine x-ray qualities that correspond to the scattered radiation that IR physicians typically encount...
This work described a continuous method to synthesize CdTe/CdS/ZnS core/shell/shell quantum dots. In an integrated system by flawlessly combining the chemical aerosol flow system working at high temperature (200-300 degrees C) to generate CdTe/CdS intermediate products and an additional heat-up setup at relatively low temperature to overcoat the ZnS shells, the CdTe/CdS/ZnS multishell structure...
Indium borate has been prepared by a sol-gel method. The structure, morphology, and photophysics of the resultant photocatalysts have been studied via the techniques of X-ray diffraction (XRD), transmission electron microscopy (TEM), and diffuse reflectance UV-visible light spectroscopy. These photocatalysts have been used to photodegrade 4-chlorophenol. The photocatalytic activity depends on t...
Handwritten characters in administrative antique documents from three centuries have been detected using different synchrotron X-ray imaging techniques. Heavy elements in ancient inks, present even for everyday administrative manuscripts as shown by X-ray fluorescence spectra, produce attenuation contrast. In most cases the image quality is good enough for tomography reconstruction in view of f...
High energy synchrotron radiation X-ray fluorescence (SR-XRF) spectra for the forensic analysis of Wakayama arsenic poisoning case, Japan, were revisited. The spectra were measured at SPring-8 synchrotron facility by Nakai in December 1998 and Mo, Sn, Sb, and Bi were used as index elements at that time to demonstrate that the suspected saleswoman’s pesticide and that found near the curry pot we...
A Si-photodiode array detector operated in the photovoltaic mode is shown to offer several advantages over other fluorescence detectors: high efficiency, perfect linearity of the response, vacuum compatibility for soft X-ray measurements, absence of gas and voltage supplies. Low temperature cooling down to 120°c is needed in order to decrease the dark current and thermal noise of the shunt resi...
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