Materials Literature
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Chemical inhibitors that prevent the formation of sulphate and carbonate mineral scale formation are used in field squeeze treatments. The demand for competent evaluation of all issues associated with mineral scaling in wells and pipelines is continuous throughout the lifetime of any producing asset and the cost impli…
In this paper,La 0.66 x Li 3x TiO 2.993 (x≤0.11) series oxides were synthesized hydrothermally.The crystallite products were characterized by mean of XRD,IR,SEM,XPS and ICP.The results indicated that the product with cubic perovskitr type structure has a particle size in the range of 100～800nm with agglomeration to a…
The electrodeposition of a sufficiently large amount of silver on silver films at high over potentials leads to excellent substrates for surface-enhanced Raman scattering (SERS) spectroscopy. The surfaces roughened in this manner show great uniformity across the active area and exhibit SERS enhancement factors which a…
Poly(aniline-co-o-chloroaniline) salts were synthesized by chemical copolymerization of aniline with o-chloroaniline using three different acids. The polymer salt samples were heat treated at four different temperatures (150, 200, 275 and 375 °C) and the thermal stability of the polymer salts were studied by conductiv…
Gd 2 O 3 :Eu phosphor particles of high brightness were directly prepared by the spray pyrolysis from solution with boric acid flux. The particles prepared from solutions with boric acid flux had higher photoluminescence (PL) intensities than that of particles prepared from solution without flux. The particles prepare…
To elucidate the process of the uptake of suspended particles into the skin, fins and gills of rainbow troutOncorhynchus mykiss, 100 fingerlings were immersed in a suspension of 1μm diameter fluorescent microspheres and rinsed with water. The fate of microspheres adhering to body surface was traced for elapsed times r…
It was confirmed by 1H NMR measurements that poly(4-hydroxystyrene sulfone) (PHOSS) was decomposed in dissolving in a deuterium oxide solution of sodium deuteroxide to give trans-2-(4-hydroxyphenyl)ethenesulfinic acid (HESA) and 4-hydroxystyrene (HOSt) quantitatively. HESA and HOSt were formed in the mole ratio of abo…
The primary goal of a materials scientist is a predictive understanding of materials properties and that requires a clear picture of the role played by electrons in determining the materials' behavior. Only then can one hope to design and build new materials with desired physical, chemical and engineering characterist…
The concept of higher order frequency response functions (FRFs) is used for the analysis of non-linear adsorption kinetics on a particle scale, for the case of non-isothermal micropore diffusion with variable diffusivity. Six series of FRFs are defined for the general non-isothermal case. A non-linerar mathematical mo…
Conduritol F 3-0- and 4-O-glucosides were obtained from Cynanchum liukiuense, along with conduritol F which was identified in all Asclepiadaceous plants examined, Tylophora tanakae, Asclepias curassavica and A. fruticosa, as well as in Marsdenia tomentosa. The pattern of the glucosidic linkage to conduritol F differed…
Six different carbonaceous polymers—polyethylene (PE), polypropylene (PP), polystyrene (PS), polyoxymethylene (POM), polymethylmethacrylate (PMMA) and polyethylene terephthalate (PET)—are submitted to a flowing nitrogen post-discharge plasma under similar experimental conditions. The nitrogen and oxygen implantations…
Microstructural evolution of 12Cr–2W–Cu–V–Nb steel tubes (ASME SA213-T122) after one-year and three-year service exposure tests in a Japanese practical boiler has been investigated from a standpoint of the phase stability of precipitates. The test tubes consist of tempered martensite and δ-ferrite, and the main precip…
The structures of mesoporous solids of abbreviated formula Al100PxVy where x, y = 0, 5, 10 have been characterised by multinuclear magnetic resonance techniques. 31P MAS spectra indicate that two phosphorus environments (threefold or fourfold O–Al coordination) are incorporated within the aluminium network. 51V magic-…
The useful perturbation expressions for wave functions and energies that are needed in perturbational molecular orbital (PMO) theory are rederived and generalized in two aspects: First, degenerate systems now can be treated in a systematic manner, as in the case of nondegenerate systems. Second, the new expressions ca…
The thermal stability of Eudragits RL, RS, E 30D, and E films was qualitatively investigated by the reflectance Fourier transform infrared microspectroscopy equipped with differential scanning calorimetry (FTIR/DSC microscopic system). DSC and thermogravimetric analysis (TGA) were also used to study the thermal behavi…
The intent of the stored energy test (SET) is to provide information on the potential for burn injury for a firefighter as a result of prolonged exposure in a structural fire within a room which has not reached a flashover condition. The SET attempts to simulate a firefighter in these conditions suddenly compressing a…
15. Axial Coordination Chemistry of Metalloporphyrins. 16. Systematics of the Stereochemistry of Porphyrins and Metalloporphyrins. 17. Alkali Metal Porphyrins. 18. Chemistry of Water Soluble Porphyrins. 19. Synthesis, Spectroscopic and Structural Studies of Metal-Metal-Bonded Metalloporphyrins. 20. Metal Tetrapyrrole…
Andy Van Kerckvoorde, Koen Trappeniers, Ivan Nijs, Louis Beyens, The Epiphytic Diatom Assemblages from Terrestrial Mosses in Zackenberg (Northeast Greenland), Systematics and Geography of Plants, Vol. 70, No. 2, Fresh Water Algae: Taxonomy, Biogeography and Conservation (2000), pp. 301-314
The effects of cotton fabric grafting with hydroxyethyl methacrylate (HEMA) and treatment with polycarboxylic acids (BTCA and CA) are studied. FTIR analysis confirms the successful graft copolymerization of HEMA onto cotton fabrics. Moisture regain decreases as the graft add-on increases, but the mechanical properties…
The usefulness of in-situ neutron and synchrotron X-ray powder diffraction methods is stressed presenting the current possibilities, limitations and potential of these techniques in the study of chemical processes. The opportunity of following the evolution of a chemical phenomenon as a function of an external or inte…