Materials Literature
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It is reported that alkali-metal borohydrides(MBH4, M = Li, Na and K) are efficient catalysts for ring opening polymerization(ROP) of α-amino acid N-carboxyanhydrides(NCAs). Polypeptides are prepared in quantitative yields with relatively narrow molecular weight distributions(MWDs = 1.1~1.5) which depend on the reacti…
Gliding arc gas discharge plasma was used for the generation of hydrogen from steam reforming of dimethyl ether(DME). A systemic procedure was employed to determine the suitable experimental conditions. It was found that DME conversion first increased up to the maximum and then decreased slightly with the increase of…
Poly(N-isopropylacrylamide)(PNIPAAm)-based thermo-responsive surfaces can switch their wettability(from wettable to non-wettable) and adhesion(from sticky to non-sticky) according to external temperature changes. These smart surfaces with switchable interfacial properties are playing increasingly important roles in a…
稳定的水的氨基接枝的硅 nanoparticles (SiNPs-NH2 ) 经由一个壶答案方法被准备。由 grafting，粒子上的氨基的组出现，水里的 SiNPs 的分散成为了很稳定、清楚的水的答案能被获得。由把 SiNPs-NH2 合并到洞搬运层 poly ( 3,4-ethylenedioxythiophene ) /polystyrene 酸性硫酸基的酸( PEDOT : PSS )，聚合物太阳能电池的表演创作了 poly [2-methoxy,5-( 2-ethylhexyloxy ) -1,4-phenylene vinylene ]( MEH-PPV ):[ 6,6 ] -phenyl-C61-butyric 酸甲…
A series of high surface area graphitic carbon materials(HSGCs) were prepared by ball-milling method. Effect of the graphitic degree of HSGCs on the catalytic performance of Ba-Ru-K/HSGC-x(x is the ball-milling time in hour) catalysts was studied using ammonia synthesis as a probe reaction. The graphitic degree and po…
采用浊度法和静态抑垢法,研究了抑制剂2-膦酸基-1,2,4-三羧酸丁烷（PBTCA）与水解聚马来酸酐（HPMA）对氟硅酸钠（钾）结晶的影响.运用经典结晶成核理论解释了抑制机理,利用扫描电子显微镜和X射线衍射技术表征了氟硅酸钠（钾）的晶体形貌和晶型.结果表明,PBTCA与HPMA通过提高氟硅酸钠（钾）结晶时的表面自由能而抑制氟硅酸钠（钾）的析出.PBTCA与HPMA之间存在明显的协同作用,PBTCA与HPMA共同作用使Na2SiF6的结晶表面自由能从108 mJ/m2升高至126 mJ/m^2,溶液中Na＋的阻垢率从6.2％上升至70.3％;使K2SiF6的结晶表面自由能从199 mJ/m^2升高至230 ml J/m^2,溶液中K…
不同淀粉明胶混合的形态学和阶段作文被各种各样的显微镜调查：光， SEM 和同步加速器 FTIR 显微镜学。高直链淀粉(80%) 玉米淀粉，有 hydroxypropyl 的 grafted 提高 flexibilty 和 hydrophilicity，和 plasticized 由 poly (乙烯乙二醇)( 木钉) ，在这个工作被使用。SEM 表明表面在增加木钉以后变得更光滑。光显微镜学观察表明在明胶和淀粉之间的相容性被增加木钉改进。一根 FTIR 横梁集中了于 5 m 桴瑡 ?? 慦楣楬慴整 ? 桴 ? 潦浲瑡潩 ? 景洠牯 ? 潣灭捡 ? 湩畴敭 ' 諟?档牡氠祡牥
The composition of solid products of vacuum decomposition of K2O2 ⋅ 2H2O2 (I) on a glass fiber matrix was determined by Raman spectroscopy. The products were mainly mechanical mixtures of potassium superoxide KO2 (II) with KOH ⋅ nH2O (III) and, in some cases, with KOH (IV). The n value in III varies from sample to sam…
As the forth-generation technology, nanopore-based DNA sequencing technology has many advantages such as low cost, long read-length, and easy integration on chips. At present, the rapid development of semiconductor technology makes it possible to fabricate nanopore-based DNA sequencing microchips of high speed and thr…
1 Introduction It is the focus of geology and biology that the creature preserved in the geological history and the organic evolution.The creature preserved in geological history by these things:sedimentary,frozen earth,chrysophoron and evaporation salt.Evaporation salt can preserve the microbe
The grain refinement mechanism and synergistic effect of Mn and Ti involved in the Ti-microalloying technology of thin slab casting and direct rolling(TSCR)were elucidated.Because the inevitable precipitation of TiN in high Ti-containing liquid steel decreases the volume fraction of TiN precipitated from austenite and…
这个工作的目的是在小粒的 bainite 微观结构上调查 La2O3 的效果并且穿 hardfacing 层金属的抵抗。有 La2O3 的不同内容的 hardfacing 层金属被准备。hardfacing 层金属的微观结构被扫描电子显微镜学(FESEM ) 和传播电子显微镜学(TEM ) 的领域排放观察。坚硬并且穿 hardfacing 层金属的抵抗分别地被测量。结果显示与 La2O3 的增加的内容，小粒的 bainite 的数量增加了，当马氏体的减少了时并且保留的奥氏体的没显然变化。当 La2O3 的内容是 2.55 wt.% 时，在 hardfacing 层金属的小粒的 bainite 的体积部分是 73.2% 。同时， h…
Eighteen azobenzene derivatives,1a—6a,1b—6b and 1c—6c,were synthesized and their gelation behaviors were tested. The synthesized azobenzenes readily formed stable gels in many polar or apolar organic solvents. As the representative,the structures of gels from compound 4b and the driving force of the gel formation were…
The optimization of electrolytes and the material removal mechanisms for Cu electrochemical mechanical planarization (ECMP) at different pH values including 5-methyl-1H-benzotriazole (TTA), hydroxyethylidenediphosphoric acid (HEDP), and tribasic ammonium citrate (TAC) were investigated by electrochemical techniques, X…
polyaniline/partially phosphorylated (乙烯基白酒)(PANI/P-PVA ) poly， nanoparticles 被苯胺单体的化学氧化分散聚合在 0.5 mol/L HCl 水的媒介准备与部分 phosphorylated poly (乙烯基白酒)(P-PVA ) 作为 stabilizer 和合作掺杂物。PANI/P-PVA nanoparticles 被传播电子显微镜学(TEM ) 描绘， Fourier 变换红外线的光谱学(FTIR ) ，热 gravimetric 分析(TGA ) ， X 光检查衍射(XRD ) ，电的传导性大小和测试的重新分散稳定性。所有结果与在 emerald…
This study attempted to develop an appropriate catalyst used for the steam reforming of gasified spent solvents. Rh2O3/ CeO2-Al2O3 catalysts with various CeO2 loadings were prepared and heated at different temperatures of 500 and 800 oC, and their surface properties were studied using X-ray diffraction(XRD), X-ray pho…
Corrosion inhibition of fluconazole on cupper in 3.5% NaCl solution was studied by means of electrochemical measurements and surface morphology observation.The results show that fluconazole exhibited good performance as corrosion inhibitor for copper and its effectiveness increases with the increasing concentrations o…
Structural, elastic, electronic and optical properties of zinc-chalcogenides(viz. ZnX, X=S, Se and Te)are studied in zinc-blende structure under hydrostatic pressure using the full-potential linearized augmented plane wave method. Generalized gradient approximation is used for exchange correlation potentials. Pressure…
Binary bright Ni–Co alloy films were electrodeposited on titanium in the chloride–sulfate electrolytes.The influences of Co2?concentration, current density, and temperature on the Ni–Co alloy films electrodeposition were investigated. The films were analyzed by scanning electron microscope(SEM), energy dispersive spec…
Loach skin mucin was isolated from loach skin mucus and found to be similar to mammalian mucins in many aspects, i.e., low amino acid residue content, high molecular weight, presence of hydrophobic blocks and gel-forming characteristics in water. However, loach skin mucin can form a weak gel in water at a much lower c…