نتایج جستجو برای: activation energy and sol

تعداد نتایج: 16997413  

2003
Wanderley dos Santos Roberto Marivalda Magalhães Pereira

This paper presents the chemical and physical characterizations of SiO 2 and SiO 2 -CaO bioactive glasses incorporated with samarium atoms, produced by sol-gel synthesis. The objective is to provide biocompatible and biodegradable radioactive seeds as an alternative to be used in Brachytherapy for the treatment of prostate cancer. The glasses were produced and analyzed by X-ray fluorescence spe...

Oils of vegetable origin are of great importance in food, soap, and cosmetic industries and they may also be used as lubricants and raw materials for biodiesel production depending on their viscosity and thermal stability. This work provides insight into the fatty acid components, physicochemical properties and thermal stability of some refined vegetable oils. The Saponification values, peroxid...

2013
R. Kannan

Nano-phasic Ba1-XSbXMnO3 have been synthesised through sol-gel citrate route. The XRD pattern has been found to be having some brown millerite phase along with pervoskite due to doping induced anti-site effect. The dependence of electrical transport at high temperatures have been studied employing thermal activation model, variable range hopping (VRH) and small polaron hopping model (SPH) to ac...

Journal: :Journal of applied physiology 2000
G E McCall R E Grindeland R R Roy V R Edgerton

Immunoassayable and bioassayable growth hormone responses to vibration-induced activation of muscle spindle afferents of the soleus (Sol) or tibialis anterior (TA) muscles were studied in 10 men. Subjects were supine while a 10-min vibration stimulus (100 Hz; 1.5-mm amplitude) was applied to the muscle, with each of the muscles tested on separate days. Blood samples were collected before, durin...

Journal: :Processing and Application of Ceramics 2022

Ce0.82Dy0.155Sr0.025O2-? (SDDC) powder was synthesized by a sucrose-pectin modified sol-gel process. The pressed and sintered at different temperatures, 1200, 1250 1300?C, to prepare dense ceramics with relative density of 91, 93 95%TD, respectively. Crystal structure phase composition were analysed XRD using Rietveld refinement. sample compositional analysis element mapping carried out energy-...

2000
A. Hassanein

A comprehensive computer package, High Energy Interaction with General Heterogeneous ‘&i.rget&ystems (HEIGHTS), has been developed to evaluate the damage incurred on plasma-facing materials during loss of plasma confinement. The HEIGHTS package consists of several integrated computer models that follow the start of a plasma disruption at the scrape-off layer (SOL) through the transport of the e...

Journal: :Journal of nanoscience and nanotechnology 2005
M A Barakat G Hayes S Ismat Shah

Co-doped TiO2 nanoparticles containing 0.0085, 0.017, 0.0255, 0.034, and 0.085 mol % Co(III) ion dopant were synthesized via sol-gel and dip-coating techniques. The effects of metal ion doping on the transformation of anatase to the rutile phase have been investigated. Several analytical tools, such as X-ray diffraction (XRD), transmission electron microscope (TEM), X-ray photoelectron spectros...

Journal: :Analytical chemistry 2002
Ya-Shiuan Lin Yu-Chie Chen

This work presents a novel method for direct desorption/ ionization of analytes from sol-gel-derived film. 2,5-Dihydroxy benzoic acid (DHB), a common MALDI matrix, was incorporated into a sol-gel polymeric structure. The sol-gel-derived DHB thin film can assist the mass analysis of analytes by laser desorption/ionization, with a matrix interference-free background in the mass spectra. The sol-g...

2003
Andrew Burns G. Hayes W. Li J. Hirvonen J. Derek Demaree Ismat Shah

Doped and undoped nanostructured titanium dioxide was synthesized via a sol–gel method under varying conditions to determine the effects of neodymium ion doping on the titania lattice. Specifically, the effects of doping on the anatase to rutile phase transformation were studied. Samples were analyzed by a variety of techniques, including X-ray diffraction, Rutherford back-scattering spectrosco...

Journal: :international journal of bio-inorganic hybrid nanomaterials 0

in this work facile sol-gel (pechni) method has been successfully established to synthesize zn4b6o13 nanocrystals which have cubic crystals with lattice parameter: a =7.48 a. the structure and morphology of the obtained material were studied by x-ray diffraction (xrd), infrared spectra (ir), scanning electron microscopy (sem) and photoluminescence analysis. the experimental results show a band ...

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