Materials Literature
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Yeni metalli ftalosiyaninler 4-(2-dimetilaminoetilsulfanil)ftalonitril ve dietil 3,4 disiyanofenilmalonat'dan sentezlendi. Metalli ftalosiyaninler (Co II,Ni II and Zn II) i ve ii nin metal tuzlar ile siklotetramerizasiyondan hazirlandi. Ftalosiyaninler farkli cozuculer ile yikandi ve izole edildi. Yeni sentezlenen bil…
OBJECTIVE: To investigate the effect of carbon ion implantation on the surface properties of denture base resins. METHODS: Twenty heat-curing denture base resins specimens were made in this study. All the specimens were equally divided into two groups randomly with each group ten specimens. One was experimental group…
Proton exchange membrane fuel cells (PEMFCs) have attracted great attention due to their high power density, low-temperature operation and high energy conversion efficiency. However, the high cost of Pt catalysts and durability problems hinder their commercialization. So their cost must be lowered drastically and thei…
The Fe-doped TiO2 films were prepared by sol-gel method and characterized by X-ray photoelectron spectroscopy(XPS), X-ray diffraction(XRD), confocal microscope Raman spectrometer(Raman), UV-Vis absorption spectroscopy(UV-Vis) and atomic force microscopy(AFM). The photocatalytic activities of the films were evaluated b…
Zyklopen (ZP) is a recently identified ceruloplasmin homologue. ZP is predicted to be tethered to the plasma membrane by its primary sequence. In addition to the placenta, ZP is also present in brain, kidney, retina, mammary gland and testes, but its role in these tissues remains unknown. The protein possessed ferroxi…
Manganese oxide octahedral molecular sieves (OMS-2) for VOCs catalytic combustion were synthesized by refluxing method. The crystal structure, particle morphology, pore structure and H2-reduction ability were characterized by XRD, SEM, N2 adsorption-desorption and H2-TPR techniques. The catalytic activities of the OMS…
The impedances of cathode materials have a great impact on the performance of solid oxide fuel cells. XRD, symmetrical cell and performance test were used to systematically study the four most commonly investigated cobalt-contained cathode materials on the YSZ electrolyte film directly and with the introduction of SDC…
为了解嘌呤合成途径的关键酶——IMP环水解酶的多样性，从深海沉积物样品中提取总DNA构建Cosmid宏基因组文库，从中筛选出一个具有IMP环水解酶活性的克隆（CAIMP1）. 通过基因步移的方法从CAIMP1的约35 kb的插入片段中扩增出长度为1 599 bp的完整的IMP环水解酶基因，该基因包含MGS和AICARFT_IMPCHas两个保守结构域. 活性检测结果表明CAIMP1克隆的发酵液上清具有较强的IMP环水解酶活性. 该酶与数据库中收录的IMP环水解酶的氨基酸序列同源性较低，系统发育分析也表明该酶与其它参照序列亲缘关系较远，表明该序列可能为一个新的IMP环水解酶基因. 图5 表3 参17
Lily's hand is not resting carelessly in her lap. Lily's sandy feet are not up on the dashboard. Lily's salty hair is not blowing into a knotted, lovely mess.
According to the thermal-electric analogies,an equivalent circuit model of the polymerase chain reaction(PCR) thermal cycle system based on thermoelectric coolers was established.System thermal parameters were replaced by equivalent electric parameters.With the equivalent circuit model,the system thermal performance w…
Ni-Ti-O/SiO2 catalyst was prepared by impregnation method, and its photocatalytic performance for carbonylation of methanol with CO2 was investigated under UV light. The in-situ IR, XPS and MS were carried out to analyze the possible photocatalytic reaction mechanism. Results indicated that the Ni-Ti-O/SiO2 exhibited…
Zinc powders were firstly modified by mechanic-chemistry method using titanate coupling agent, silane coupling agents and sodium dodecylbenzenesulfonate. Their dispersion stabilities were investigated via measuring the height with the sedimentation method. The results showed that different species and concentrations o…
Co3O4 nanorods were fabricated by the low-temperature hydrothermal method. The Co3O4 nanorods were formed through adding a small amount of surfactants (Polyvinylpyrrolidone, referred to as PVP) and reacting at 95 degrees C. Controlling the reaction time of preparation and pH of the solution can affect the properties o…
Abstract : The Navy's focus on lighter and faster ships has resulted in the increased use of composite materials for new ship designs. There are a variety of resources available that contain background information on composite materials and the methodology for the development of design and materials allowables for com…
【The severe corrosion environment makes the steel product lifecycle short while Cu-alloys with anti-corrosion characteristic used in sea water are too expensive. This study shows that the Cu-alloy(Cu-37.25% Zn-0.67%Al) used in sea water environment can be superseded by SS400 with various coating process, evaluating el…
A kind of hydrophobic zeolitic monolith were prepared by mixing HY/ZSM-5, additives and water, followed by processes of extrusion and drying, and then hydrophobic modification with SiCl4. The structures and properties of the adsorbent were examined by nitrogen adsorption and desorption measurement, XRD, and benzene ad…
Sr2SiO4:Eu0.03(2+) phosphors were synthesized through the solid-state reaction technique. The X-ray diffraction shows that the phase of the phosphors is orthorhombic alpha'-Sr2SiO4. The produced phosphors show one intense emission band located at 490 nm. The phosphor shows a long afterglow properties excited by the su…
The effect of methanol concentration on the performances for passive air-breathing direct methanol fuel cell (DMFC) was studied by single cell tests and methanol transfer theory. With the increase of methanol concentration, the Faradic efficiency and energy efficiency were decreased due to the methanol crossover effec…
A novel bisphenol F-type dianhydride(BPFDA) monomer was synthesized using 4-chlorophthalimide through hydration, acidification, and dehydration. Its structure was determined with 1H NMR and IR. Two types of polyimide films were prepared with the dianhydride and 4,4′-diaminodiphenyl ether(ODA) or 4,4′-methylene dianili…
The synthesis, characterization, and photovoltaic performance of two new organic dyes, hexapropyltruxeneamino-rhodanine-3-acetic acid(MXD8) and hexapropyltruxeneamino-3,4-ethylenedioxythiophene rhodanine-3-acetic acid(MXD9), were reported. The two dyes contain truxene-based triarylamine as electron donor and a rhodani…