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。
Abstract The oxygen isotope compositions of pedogenic calcite and illite in three Paleozoic vertic red bed paleosols record a complex history of pedogenic and diagenetic processes. The paleosols are preserved in the upper Mississippian (Chesterian) Mauch Chunk (Pennsylvania), Hinton (West Virginia), and Pennington (Te…
Single-wall carbon nanotubes (SWNTs) were synthesized in high yield by laser vaporization of a Rh/Pd-graphite composite rod at 1200 °C. Lattice constants of the bundle were estimated from transmission-electron-microscope images and were found to be distributed between 1.0 and 1.5 nm. Nine Raman peaks originating from…
Effects of the sample volume and frequency on the decomposition of 5,10,15,20-tetrakis(4-sulfonatophenyl) porphyrin (H 2 TPPS 4- ) were studied at frequencies of 126 and 500 kHz and 1 MHz. The decomposition of the porphyrin depended on the cell radius and liquid height. The decomposition ratio, (1- R TPPS ), was expre…
Electrochemical characteristics of Al 6061 (UNS A96061), Al and an Al-Cu alloy were investigated in aqueous solutions. Inhibition of the corrosion processes in basic solutions was studied using electrochemical impedance spectroscopy (EIS) and polarization techniques. Among a series of inhibitors, molybdate (MoO42–) an…
The interfacial resistance of Ni‐ ‐stabilized (Ni‐YSZ) anodes on YSZ electrolytes has been reduced by inserting thin interfacial layers of ‐doped YSZ (YZT) or ‐doped , (YDC). Impedance spectroscopy measurements at temperatures ranging from 600 to 750°C typically showed a high frequency arc (HFA) and a low frequency ar…
There are relatively few applications in the market that utilize SMA considering the large number of patents filed. This can be partly explained by the lack of design tools able to correctly predict SMA behavior. Due to the highly non-linear behavior of SMA, classical methods of design are inefficient. Furthermore, SM…
Stress relaxation behavior of short pineapple fiber reinforced polyethylene composites in tension has been studied with special reference to the effect of fiber loading, fiber length, chemical treatment and fiber orientation. Chemical treatments of fiber with reagents such as isocyanate, silane, alkali and peroxide we…
Two- and three-dimensional kinetic Monte Carlo simulations were used to model the deposition of a hyperthermal molecular beam at varying angles of incidence. The simulations incorporate realistic deposition and diffusional moves, and feature many-layer growth for large systems containing up to 80 000 atoms. Kinetic Mo…
Abstract The interactions of silica filler in zinc activated, sulfur vulcanized cis -1,4-polyisoprene (IR) were characterized using Fourier Transform Infrared (FTIR)-Attenuated Total Reflectance (ATR) spectroscopy. The variables examined were increased levels of silica and quality of mixing of the batch. The increased…
The four-electron reduction of dioxygen to water by trinuclear copper clusters is of great biological significance. Recently we reported the crystal structure of a trinuclear model complex in which the three coppers provide the four electrons necessary to fully reduce dioxygen, generating two μ 3 -oxo bridges. This co…
In this article we explore the relationship between the plasma-phase chemistry and deposit in the plasma deposition of acrylic acid. This is achieved through systematic variation of some of the plasma deposition variables, termed “processing parameters.” The surface chemical composition of deposits has been investigat…
A flash-annealing method has been developed that increases the diffraction limits, and simultaneously decreases the mosaicity of glycerol kinase crystals. This technique utilizes brief thawing and rapid freezing cycles of the crystal in the cold nitrogen stream. The effective resolution limits increased almost by 0.8…
The electrochemical characteristics and product distribution for a ceria‐based solid oxide fuel cell using hydrogen sulfide as the fuel were examined. The cell studied had the configuration , air. Low anode overpotentials and high exchange current densities (>60 mA/cm 2 in some instances) were observed. An analysis of…
The aggregate stability of several surface soils from Thessaly plain, Central Greece, was studied using an instability index which classified the soils according to the stability of their aggregates to water. This index was correlated to the basic soil properties influencing aggregate stability. It was found that soil…
Presence of H2S in a carburizing atmosphere causes S-adsorption which retards carbon transfer and deposition and can suppress metal dusting of iron and steels. In the latter process cementite Fe3C is an intermediate, graphite deposition would initiate its decomposition but graphite nucleation is prevented by adsorbed…
Abstract The title complex, [Co(odmbpc)], which is a single isomer and is highly soluble in common organic solvents, has been prepared and investigated electrochemically and spectroelectrochemically in dichloromethane solutions. The cyclic voltammograms of this complex at a concentration of ca. 6 × 10−5 mol dm−3 exhib…
Corrosion inhibition of SAE 1018 steel by Pseudomonas fragi and Escherichia coli biofilms has been evaluated using batch cultures in rich medium (LB) and seawater-mimicking medium (VNSS) at 23 degrees C and 30 degrees C with or without daily medium replenishment. Biofilm components have been stained simultaneously for…
Electric field induced ion drift processes in alkali‐borosilicate glasses play a key role in the silicon‐glass or metal‐glass compound formation in anodic bonding processes. By means of ex situ and in situ ion‐beam analysis, which allows a quantitative depth profiling of different elements, the formation of anodic, al…
The transcripts of structurally related cellobiohydrolase genes in Phanerochaete chrysosporium-colonized wood chips were quantified. The transcript patterns obtained were dramatically different from the transcript patterns obtained previously in defined media. Cellobiose dehydrogenase transcripts were also detected, w…
Microstructural changes in yttria‐stabilized zirconia with aging were investigated by X‐ray diffraction, high resolution transmission electron microscopy (TEM), energy dispersive X‐ray spectroscopy under TEM, and electron diffraction. First, various microstructural changes reported in the literature as the causes of t…