Materials Literature
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For the MHD equilibrium reconstruction of a reverse field pinch device, it is a big issue to identify accurately the strong eddy current flow on the shell. In the present work, boundary integrals of the eddy current along the shell are added to the conventional Cauchy-condition surface method formulation. The eddy cur…
The poly(2-chloroaniline) and poly(2-chloroaniline)-DBSA/Silk and P2ClAn/Silk were prepared by insituchemical oxidative polymerization technique using ammonium per sulphate (oxidant), HCl and dodecyl benzene sulphonic acid (DBSA) as the dopant and sodium lauryl sulphate as the surfactant. The formation of polymers and…
BACKGROUND: Occlusions of artificial small-diameter cardiovascular grafts are frequent events after implantation, often caused by clot formations. A main factor is the insufficient hemocompatibility of the inner artificial graft surface, which could be improved by endothelialization. Therefore, one challenge in cardio…
Experimental tests of metal extraction from stones sampled from articially contaminated railway ballasts are presented and discussed. Metal extraction was performed by washing with aqueous solutions of disodium ethylenediaminetetraacetate (EDTA), at selected concentrations. The eectiveness of the remediation process w…
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In the present work, the effect of SiO2 was analyzed in different molar ratios (Lu : Si = 4 : 1, 6 : 1, 8 : 1, 10 : 1 and 1 : 0), in order to prepare SiO2 embedded Lu2O3:Eu3+ sol-gel luminescent powders, from a modified PVP-containing solution. The crystalized SiO2 embedded Lu2O3:Eu3+ powders were characterized by Fou…
Global warming arising from the emission of greenhouse gases, especially CO 2 , has become a biggest issue all over the world in the recent years.Though various CO 2 capture technologies have been proposed, chemical absorption and adsorption are currently believed to be the most suitable ones for post-combustion power…
Various quasi-2D systems are examined experimentally, particularly via the radial distribution function, in an inexpensive and convenient driven granular system. Results regarding the effects of polydispersity and granular collapse are presented. It is found that, even using a simple size distribution, Monte Carlo equ…
A study of natural radioactivity of Rock, Sediment, and Building samples collected from different areas of Sikiti settlement, in southwestern Nigeria was carried out via gamma-ray spectrometry, using NaI (Tl) detector. The mean Activity concentration of 40K, 226Ra and 232Th in Rock samples was 935.05 ± 702.08 BqKg-1,…
1 CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France. Association EURATOM-Belgian State, LPP-ERM-KMS, TEC partner, Brussels, Belgium Euratom/CCFE Fusion Association, Culham Science Centre, Abingdon, OX14 3DB, UK Max-Planck-Institut fur Plasmaphysik, EURATOM-Assoziation, Garching, Germany Forschungszentrum Julich, EURAT…
Intake and exhaust valves of naval Diesel engines suffer from several problems due to the combined and synergistic effects of mechanical stresses and a chemically aggressive environment. Hard chrome plating has been widely used as the standard solution for valves stem, but its limited wear-orrosion resistance and the…
Al-doped zinc-oxide (AZO) thin films treated by oxygen and chlorine inductively coupled plasma (ICP) were compared. Kelvin probe (KP) and X-ray photoelectron spectroscopy (XPS) were employed to characterize the effect of treatment. The results of KP measurement show that the surface work function of AZO thin films can…
Gemini PEO-PPO-PEO * ( 100190) (NOESY, ), pH9 Gemini 12-3-12(SO 3 ) 2 PEO-PPO-PEO F127 (EO 97 PO 69 EO 97 ) P123 (EO 20 PO 70 EO 20 ). , 12-3-12(SO 3 ) 2 , (CMT). , 12-3-12(SO 3 ) 2 CMT . , CMT , 12-3-12(SO 3 ) 2 /; CMT
As restrições de difusão dos reagentes, causadas pelos microporos, limitam a utilização de zeólitas no processamento de moléculas volumosas. Isto exige o desenvolvimento de materiais que combinem as propriedades das zeólitas com aquelas dos materiais mesoporosos. Com este objetivo, neste trabalho, estudou-se a influên…
Abstract - The use of fly ash products by the South African cement and construction industries has saved the country over 6 million tons of harmful greenhouse gas emissions. Fly ash is an industrial by-product that is normally consigned to landfills and the re-use of it as cement extenders provides an immediate benefi…
The back junction back contact cell, and more specifically the interdigitated back contact (IBC) cell is among the most appropriate cell design to achieve high cell efficiency. An important aspect to improve manufacturability (e.g. reduce cost) of the cell and module is allowing larger feature sizes for the different…
This review provides an overview of the basic principles and key technical issues of surface enhanced Raman scattering (SERS) and tip enhanced Raman scattering (TERS). After a brief introduction to surface plasmon resonance (SPR) absorption and the b
The electromagnetic incremental forming (EMIF) method is used for tube forming process. Suitable 2D FE models are designed to predict the forming process with a moving coil. In comparison with experimental values, simulation method can obtain accurate results. Then, effect factors named overlapping ration of adjacent…
En este trabajo, se evaluaron las condiciones de operacion de los procesos quimicos que se realizan para la obtencion de quitina y quitosano en un reactor piloto y se comparo con un reactor industrial.. utilizando los exoesqueletos de cangrejo de la variedad de cangrejo azul (Callinectes sapidus). Se evaluo el proceso…
The reduced equilibrium moisture content (EMCR) and moisture exclusion efficiency (MEE) of acetylated rattan was studied in relation with age and time of acetylation. Rattans aged 10 and 13 years grown under rubber trees were reacted with acetic anhydride for 0.25 to 30 hours. Results showed that the lowest EMCR and t…