Materials Literature
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Chitosan was purportedly first discovered in 1859 by Rouget while he was experimenting with chemical and thermal manipulation of the natural fiber chitin (Au Natural Herbals, 2001). Since then, chitosan has been used as a pharmaceutical excipient in sustained release dosage forms, as an immunostimulant, and to promote…
Ag, Pt, and Pd were added to the cathode functional layer of planar solid oxide fuel cells to increase the current density. The addition was performed by four methods: infiltration (Pd), coating (Pt), mixing (Ag, Pd, Pt), and synthesis of La 0.65 Sr 0.30 MnO 3 with the addition of AgNO 3 . An electrocatalytic effect w…
The activation of clays by heat treatment will produce artificial pozzolana which reacts with Ca+2 or Ca(OH)2 in presence of water to form new building materials. In this study the montmorillonite clay was activated by burning at different temperatures (550,700,800,900 & 1000°C) then mixed with lime at different compo…
Hardwood and softwood fibers from high-temperature defibration (171-202°C) were treated with Fenton's reagent (H 2 O 2 -FeSO 4 ) or gamma-irradiated. The persistent radicals formed were quantified by ESR-spectrometry. A large increase in the fiber free radical content was obtained by H 2 O 2 -FeSO 4 treatment with H 2…
The solubility data are important for recovery process of spectinomycin dihydrochloride from its aqueous solution. Solubility of spectinomycin dihydrochloride in pure water at 9~55℃ and that in acetone-water mixture at 9~30℃ were experimentally determined by laser direct method. The solubility of spectinomycin dihydro…
The inspection index of eletromagnetic shielding was introduced.Four inspection methods that is waveguide method,microwave darkroom method, microwave dark trunk method and field method were discribed and compared.Their advantage and disadvantage of each method were pointed out.The result can provide references to…
This paper reviews burning-resistant mechanisms, alloy systems and methods of evaluating burn resistance of non-burning titanium alloys. The present status and future trends of non-burning titanium alloy research are also discussed. In addition, several suggestions are presented for boosting non-burning titanium alloy…
The atmospheric corrosion law of zinc in three typical arears in China such as Shenyang,Jiangjin and Qingdao was studied through out-door exposure test.An accelerated corrosion test consisted of cyclic steps immersion-dry-wet was also applied to simulate the process of atmospheric corrosion,the solutions of (NH 4) 2SO…
XRD Rietveld analyses show that La0.7Mg0.3(Ni0.85Co0.15)x 0=2.5, 3.0, 3.5, 4.0, 4.5, 5.0) alloys are consisted of (La, Mg)Ni3 phase and LaNi5 phase, and the (La, Mg)Ni3 phase content increases from 48.4% (x=2.5) to 78.2% (x=3.5) and then decreases to 12.2% (x=5.0). The LaNi5 phase content maintains unchanged (about 20…
The aim of the present study is to investigate strain rate dependency of Al-Mg alloys within a wide range of strain rates. Tensile tests of a wide range of strain rate are carried out using Instron universal, servo-hydraulic impact and split-Hopkinson bar testing machines. Also, strain rate sensitivity is evaluated by…
Irradiation assisted stress corrosion cracking (IASCC) is a potential failure mode suffered by the core-components of austenitic stainless steels in the aged light-water reactor (LWR), which is the intergranular type cracking caused by synergistic effects of neutron/gamma radiation and chemical environment. Effects of…
In order to investigate the texture formation of Nd-Fe-B system sintered magnet, 006 Miller indices pole figures of (Nd⋅Dy)2Fe14B phase were measured for as-compacted sample and for as-sintered one by X-ray diffraction. The degree of preferred orientation P was estimated by the integration of the product between the n…
he thermooxidative degradation of polytetrafluoroethylene (PTFE), both pure and containing additives such as: carbon (graphite) (C), bronze (BZ) and glass fibre (GF), has been studied by non-isothermal thermo-differential analysis (DTA). The values of kinetic parameters obtained from the DTA data, on the basis of ther…
A numerical model has been developed for simulating the rapid solidification processing (RSP) of Ni-Al alloy in order to predict the resultant phase composition semi-quantitatively during RSP. The present model couples the initial nucleation temperature evaluating method based on the time dependent nucleation theory,…
The synthesis of several mononuclear and binuclear manganese(III) complexes from 3,4:9,10-dibenzo-1,12[{N,N'-bis(4-methyl-1-oxa)-6,6'-formyl}-2-benzyldiaza]-5,8-dioxacyclotetradecane have been described. The X-ray crystal structure of the manganese(III) complex [MnL2a(H2O)(ClO4)]·(ClO4)2·3H2O·CH3OH revealed a six coor…
Grazing incidence small angle X-ray scattering was used with synchrotron beam to determine lateral pore sizes and distances between pores formed by anodizing thin (∼300 nm) surface layers of p-type silicon substrates with different current densities, electrolyte compositions, and temperatures. The diffuse scattering w…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation G. G. Fuentes, Ewa Borowiak‐Palen, T. Pichler, A. Graff, G. Behr, R. J. Kalenczuk, M. Knupfer, J.…
The Pd-B/γ-Al2O3 amorphous alloy catalyst and Pd/γ-Al2O3 crystalline metal catalyst were prepared by KBH4 reduction and routine impregnation, respectively. Pd-B/γ-A12O3 and Pd/γ-A12O3 catalysts were characterized by XRD and SEM. It was found that the catalytic activity of the Pd-B/γ-A12O3 amorphous alloy catalyst was…
The United States may well have spent more money in the effort to develop nuclear waste sites than any other nation on earth, but save for the case of a facility in New Mexico that handles only military wastes, every single effort to site a new repository in the last several decades has ended in failure.Given that the…
Different corrosion reactions were studied as a function of the bulk electrolyte pH, acidic, neutral and alkaline pH. Three variables, H+, OH‘ and dissolved metal ions concentration were modeled along with the water ionization reaction as a homogeneous reaction. Different geometries were selected to simulate metal cor…