Materials Literature
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Rhizosphere processes, such as the production and release of organic acids, contribute to differences in properties between rhizosphere (R) and nonrhizosphere (NR) soils. We compared the organic acid composition/concentrations in the R and NR soil extracts of Picea glauca and Abies lasiocarpa, and in the root exudates…
For Crenarchaea, two new autotrophic carbon fixation cycles were recently described. Sulfolobales use the 3-hydroxypropionate/4-hydroxybutyrate cycle, with acetyl-coenzyme A (CoA)/propionyl-CoA carboxylase as the carboxylating enzyme. Ignicoccus hospitalis (Desulfurococcales) uses the dicarboxylate/4-hydroxybutyrate c…
A novel esterase was identified through functional screening of a metagenomic library in Escherichia coli obtained from Antarctic desert soil. The 297-amino-acid sequence had only low (<29%) similarity to a putative esterase from Burkholderia xenovorans. The enzyme was active over a temperature range of 7 to 54 degree…
Phenotypic mutants of Sporosarcina pasteurii (previously known as Bacillus pasteurii) (MTCC 1761) were developed by UV irradiation to test their ability to enhance urease activity and calcite production. Among the mutants, Bp M-3 was found to be more efficient compared to other mutants and wild-type strain. It produce…
The corrosion and behavior of carbon steel in 2 M HCl in the presence of N-(2-hydroxybenzilidene) thiosemicarbazide (HBTC) was investigated using weight loss and electrochemical studies. The morphology of carbon steel surface was investigated using scanning electron microscopy (SEM) and Mössbauer spectrometry. The cor…
Wide band gap semiconductors such as GaN and ZnO have continued to be at the forefront of spintronics research due to the demonstration of room-temperature ferromagnetism in these materials. A goal of this research is the fabrication of a spintronic device that may provide easy incorporation into existing GaN and ZnO…
The objective of this review is to outline the beneficial role of surfactants as corrosion inhibitors in the petroleum field. After an introduction and brief notes on fundamentals of surfactants, the article shows the most important corrosion problems in the oil industry and the effective role of surfactants to solve…
Occurrence of surface ferromagnetism in inorganic nanoprticles as a universal property not only explains many of the unusual magnetic features of oxidic thin films, but also suggests its possible use in creating new materials, as exemplified by multiferroic BaTiO3 nanoparticles. While the use of Mn-doped ZnO and such…
Millimeter size single crystals of double perovskite La2NiMnO6 (LNMO) were grown by the High Temperature Solution Growth Method. The magnetic measurements and polarized Raman spectra between 5 and 350K provide evidence that the crystals have high degree of Ni(2+)/Mn(4+)ordering, small amount of lattice defects and hig…
Poster presentation
Three years ago, a new universality class, associated with the metal-insulator transition in quasi-two--dimensional compounds, was discovered.Imada has given explanation of the observed critical behaviour.Considerations in this work are based on the assumption that the one-particle dispersion is quartic one instead of…
用密度泛函B3LYP方法, 研究了二重态和四重态势能面自旋禁阻反应Ti+(4F, 3d24s1) + C2H4 → TiC2H2+ (2A2) + H2的微观机理. 通过自旋-轨道耦合的计算讨论了势能面交叉点和可能的自旋翻转过程. 中间体IM1-4B2处, 四重态和二重态间的旋-轨耦合值为59.3 cm-1. 自旋多重度必将发生变化, 从四重态系间穿越到二重态势能面形成共价型复合物IM1-2A1, 同时导致四重态势能面的势垒明显降低. 到插入中间体IM2后, 二重态势能面上有两条不同的反应路径, 即分步和协同路径, 后者在二重态势能面上得到放热产物TiC2H2+ (2A2) + H2具有较低的活化势垒, 4.52 kcal/mol…
A new complex (bpy H)2 [Bi2I8 (bpy)2] was synthesized by the reaction of BiI3 and 4,4'-bpy in solution. The results of single-crystal X-ray diffraction revealed that it consists of (bpy H)2 [Bi2I8 (bpy)2] units in which the Bi(Ⅲ) ion is located in a slightly distorted octahedral center. Two separate [4,4'-bpy H](super…
$Zn_{2}SiO_{4}$ :Mn green phosphors doped with Mg for PDP were synthesized by solid state reaction method. $Zn_{2}SiO_{4}$ :Mn, Mg phosphors with increasing Mg concentration were changed from Rhombohedral to Orthorhombic structure. Photoluminescence intensity of $Zn_{2}SiO_{4}$ :Mn phosphors doped with Mg 0.5 mol was…
Effects of ceramic filler types and dose on the low temperature sintering and dielectric properties of ceramic/ $CaO-Al_{2}O_{3}-SiO_2$ (CAS) glass composites were investigated. All of the specimens were sintered at $850{\sim}900^{\circ}C$ for 2 h, which conditions are required by the low-temperature co-firing ceramic…
Phosphor Sr3Al2O6: Eu was synthesized in thermal carbon reduction atmosphere with (NH4)3PO4 as the assisted reducing agent. The characterized emission of Eu(superscript 2+) can be observed when the phosphor is excited by the ultra violet with the wavelength of 360 nm, and the characterized emissions of Eu(superscript…
A process has been developed for fabricating perfluoropolyether (PFPE) membranes that contain microscopic holes of precise sizes at precise locations. The membranes are to be incorporated into laboratory-on-a-chip microfluidic devices to be used in performing capillary electrophoresis. The present process is a modifie…
Several metal alloys have shown promise as improved catalysts for catalytic thermal decomposition of hydrocarbon gases to produce carbon nanotubes (CNTs). Heretofore almost every experiment on the production of carbon nanotubes by this method has involved the use of iron, nickel, or cobalt as the catalyst. However, th…
A 1 MW class HTS (High-Temperature Superconducting) synchronous motor has been developed. This motor is aimed to be utilized for industrial application such as large motors operating in large plants. The HTS field coil of the developed motor is cooled by way of neon thermo siphonmechanism and the stator (armature) coi…
Silicon nanowires (SiNWs) with a diameter about a few nanometers and a length of tens of micrometers on silicon wafers were synthesized by thermal evaporation of silicon monoxide (SiO). The SiNWs were measured by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and Raman spectroscopy.…