An electron microscopic technique, energy-dispersive x-ray (EDX) analysis, was applied to rat tissue specimens containing gadolinium diethylenetriamine-pentaacetic acid (DTPA). EDX spectroscopy was able to detect the characteristic radiation spectra of gadolinium from tissues in concentrations as low as 0.005 mmol per gram of tissue. A mapping algorithm allowed the detected spectra to be assign...

In this work, CrAlN and TiAlN coatings were deposited on stainless steel substrates by a vacuum arc reactive deposition process from two lateral rotating elemental aluminum and chromium or titanium cathodes in a flowing pure nitrogen atmosphere. The composition and crystalline structure of the as-deposited coatings was analyzed by energy dispersive analysis of X-rays (EDX) and X-ray diffraction...

In modern Scanning Electron Microscopes (SEM) a large variety of different signals is collected to create images with various contrasts or to receive compositional information. Among others, Backscattered Electrons (BSE) and characteristic X-rays belong to the major signals which are collected routinely. Both give information about the sample composition and therefore complement each other very...

Thermal decomposition of two coal samples obtained from Top Seam Sibi (TSS) and Sore Range Quetta (SRQ) coal fields in their raw and acid washed forms were carried out in an open type tubular pyrolyzer coupled to a gas chromatograph with FID. Elemental analyses were carried out with Scanning Electron Microscope-Energy Dispersive X-rays (SEM-EDX) analyzer. Effect of inherent mineral contents...

Colloidal cadmium selenide (CdSe) and zinc selenide (ZnSe) quantum dots with a hexagonal structure were synthesized by irradiating an aqueous solution containing metal precursors, poly (vinyl pyrrolidone), isopropyl alcohol, and organic solvents with 1.25-MeV gamma rays at a dose of 120 kGy. The radiolytic processes occurring in water result in the nucleation of particles, which leads to the gr...

Gold nanoparticles supported on zinc oxide nanoparticles were synthesized at several pH levels via the deposition-precipitation (DP) method. The effects of pH on gold loading, particle size, and particle size distribution on the support were studied at the iso-electric point (IEP) as well as below and above the IEP of ZnO. The addition of the support significantly changed the pH of the solution...

Recent advances in the development of electron and X-ray detectors have opened up possibility to detect single events from which its time arrival can be determined with nanosecond resolution. This allows observing correlations between electrons X-rays transmission microscope. In this work, a novel setup is described measures individual using silicon drift detector digital pulse processor for Ti...

Morphological, chemical and optical absorbing characterization of aerosols in the urban atmosphere of Valladolid S. Mogo, V. E. Cachorro, and A. M. de Frutos Grupo de Óptica Atmosférica, Universidad de Valladolid, Valladolid, Spain Dep. de Fı́sica, Universidade da Beira Interior, Covilhã, Portugal Received: 28 February 2005 – Accepted: 20 April 2005 – Published: 13 June 2005 Correspondence to: S...

polyvinylpyrrolidone  /  nickel  oxide  (pvp/nio)  dielectrics  were fabricated  with  sol-gel  method  using  0.2  g  of  pvp  at  different working  temperatures  of  80,  150  and  200  ºc.  structural  properties and surface morphology of the hybrid films were investigated by x-ray  diffraction  (xrd)  and  scanning  electron microscope  (sem) respectively. energy dispersive x-ray spectrosc...