Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A series of polyoxometalates have been synthesized and evaluated for their inhibitory effects on HIV-1(III(B)) and HIV-1(ROD) replication in MT-4 cells. All compounds showed activity against HIV-1 and HIV-2, but the antiviral potency of the heteropolytungstates varied considerably depending on their chemical structure…
A new general approach for improving polymer substratum biocompatibility is proposed. In a first example, polysulfone (PSf) film was modified by covalent end-on grafting of poly(ethylene glycol) (PEG) (2, 5, and 10 kDa) using well-defined, photoreactive α-4-azidobenzoyl β-methoxy PEG conjugates (ABMPEG). After adsorpt…
The formation processes of the silica nanotubes by a surfactant-assisted templating mechanism were elucidated in a laurylamine hydrochloride (LAHC)/tetraethoxysilane (TEOS) system by measuring the evolution of the shape and size of surfactant/silicate molecular assemblies with small-angle X-ray scattering, together wi…
Dense perovskite-structured membranes with desired composition of La 0.8 Sr 0.2 Co 0.6 Fe 0.4 O 3 - δ (LSCF) were prepared from powders produced by four different methods. LSCF powders prepared by citrate, solid-state, and spray−pyrolysis methods had compositions close to the desired stoichiometry with a slight differ…
A rigorous study was made of the different experimental conditions that affect the obtention of high-area spinels. Some of the key factors in the preparation of NiAl 2 O 4, such as precipitation and calcination temperatures, have been carefully studied and correlated to the reducibility of the final spinel. All the sa…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTTemperature-Sensitive Dendritic Hosts: Synthesis, Characterization, and Control of Catalytic ActivityMutsumi Kimura, Michinori Kato, Tsuyoshi Muto, Kenji Hanabusa, and Hirofusa ShiraiView Author Information Department of Functional…
The effect of impurities on epitaxial growth in the submonolayer regime is studied using kinetic Monte Carlo simulations of a two-species solid-on-solid growth model. Both species are mobile, and attractive interactions among adatoms and between adatoms and impurities are incorporated. Impurities can be codeposited wi…
Abstract Ordinary foams such as the head of a glass of beer and more exotic ones such as solid metallic foams raise many questions for the physicist and have attracted a substantial research community in recent years. This book describes the results of extensive experiments, computer simulations and theories in an aut…
Abstract In recent years a number of new HT/HP reservoirs have been developed in the North Sea, for example the ETAP (Eastern Trough Area Project) and Shearwater fields, which have a number of important "scale" control issues. In addition to harsh downhole conditions (T > 175°C; P • 13,000 psi), high salinity (…
Abstract An alternative scale inhibition method using encapsulated scale inhibitor has been successfully used to control calcium carbonate scaling in the Ghawar Field oil wells of Saudi Aramco, Saudi Arabia. Field tests indicate that the Ghawar Field requires a low threshold scale inhibitor concentration for scale mit…
Highly transparent carbon nitride thin films have been prepared on transparent plastic substrates at low temperatures by radio frequency reactive magnetron sputtering of a graphite target in the plasmas of pure nitrogen and nitrogen-hydrogen gas mixtures. The amorphous films thus obtained have been characterized for t…
Abstract The squeezing of scale inhibitors into the near well bore region of oil producing wells is a recognised solution to downhole scale prevention. In many cases, this downhole application leads to an initial decrease in the well productivity, which can recover to the pre squeeze level with time. However, in some…
The transition between cubic and tetragonal phases in KMnF 3 has been studied by x-ray diffraction rocking curves and calorimetry. Comparison of the excess entropy with the order parameter Q obtained from spontaneous strain shows that the mean field relationship S Q 2 is obeyed to within experimental error. The data a…
The influence of probing laser power density on the band-edge and the trap luminescence from CdS x Se 1- x nanoparticles embedded in a glass matrix is reported. Both the position and the strength of the band-edge luminescence are found to be very sensitive to the laser power. It is observed for the first time that the…
Abstract In the development of Elf Exploration Angola’s Girassol field located approximately 200 km west of the coast of Angola in 1,500 m of water depth, 390,000 barrel per day of seawater will be needed for a waterflood operation. Formation water analysis indicate both barium and strontium levels of approximately 23…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTPerfluorocyclobutyl Liquid Crystalline Fluoropolymers. Synthesis and Thermal Cyclopolymerization of Bis(trifluorovinyloxy)-α-methylstilbeneD. W. Smith, H. W. Boone, R. Traiphol, H. Shah, and D. PerahiaView Author Information Departm…
Abstract Ester cross-linking of various classes of organic acid scale inhibitors has been investigated as a possible means to enhance inhibitor retention in the near wellbore reservoir. Three generically different polycarboxylic acid based inhibitors have been successfully ester cross-linked. Inhibition tests indicate…
Abstract 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 c…
Abstract This paper describes the development of a PMPA scale inhibitor chemistry, for potential ‘squeeze’ application, to provide scale inhibition under severe Barium Sulphate scaling conditions. Phosphonate type inhibitor chemistries have been applied in ‘squeeze’ treatments as they have the desired adsorption chara…
Abstract Carbonate or sulphate scaling is usually mitigated by using chemical inhibitors that alter the growth mode of the scale mineral, but with halite scaling the apparent absence of a suitable inhibitor has meant that periodic removal with low-salinity water has been favoured. We report laboratory testing and the…