Materials Literature
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In situ Raman spectra of D,L-mandelic acid were characterized under high pressure generated by diamond anvil cell at room temperature. The pressure was up to 2. 2 GPa. Around 0. 6 GPa,some original Raman peaks disappear or split,and some new Raman peaks emerge. Within the experimental pressure range,the curve of Raman…
在过去几十年期间，有许多的 nanocatalysts 上有全面研究在他们一纳米上的结构和形态学的精确操作的创新进展由化学家和材料科学家可伸缩[1 ] 。与体积催化剂相比， nanocatalysts 由于小粒子有高 surface-to-volume 比率并且与挂在表面上暴露的契约有活跃原子的大部分，它能在催化活动产生重要增加[2  ； and ； 3 ] 。与外部壳包含的一个内部核心，核心壳 nanoparticle 结构为高效 nanocatalysts 的制造被认为一个好平台[4， 5， 6， 7， 8， 9  ； and ； 10 ] 。核心壳 nanocatalysts 能不仅改进催化表…
The effect of tramp elements in the steel was intensively studied.It was found that the solubility of tramp elements decreased as the temperature decreased under normal cooling conditions.The tramp elements(Cu,Pb,and Sn)diffused toward the grain boundaries,and intermetallic compounds or rich phases which have low melt…
A plasma driven catalyst reactor was applied to the degradation of gaseous xylene combined with the TiO2 catalyst processed by an acidized treatment, which pro- moted both Lewis and Bronsted acid sites on the surface of the catalyst. Results showed that the acidized TiO2 performed much better than untreated TiO2 in th…
Ni类型合金。氢存储动力学的测量显示 Nd 的增加显著地改进合金的气体、电气化学的氢存储动力学。 Nd 的增加在合金提高氢原子的散开能力，但是它在合金电极的表面上损害费用转移反应，它首先造成合金电极的高率分泌物能力( HRD )增长在上面然后因成长 Nd 内容倒下。
The influences of thermal cycling treatment in the temperature range of B2-B19 martensitic transformations(-150 to 150 °C) on the Ti Ni alloy structure and properties were studied. Different states named the initial coarse-grained(CG) state, the ultrafine-grained(UFG) state after ECAP(with a grain size of 200 nm), the…
目的：建立肾上腺素光学异构体中 S-对映体的高效液相色谱手性流动相检测方法。方法 Purospher STAR RP-18色谱柱（4.6 mmx250 mm,5μm）,流动相：10 mmol·L-1磷酸二氢钠缓冲液（含10 mmol·L-1手性添加剂磺丁基-b-环糊精,磷酸调节 pH 至3.0）-乙腈（98.5：1.5）,流速0.8 mL·min-1,柱温30℃,检测波长280 nm。结果肾上腺素 S-对映体在浓度5.02-501.50μg · mL-1范围内与峰面积呈良好的线性关系,相关系数0.9997,检测限0-05μg·mL-1。结论该方法重复性、耐用性好,适用于盐酸肾上腺素注射液中 S-对映体杂质含量的测定。
Cross-linked gelatin has been prepared using ferulic acid as cross-linking agent in a previous article. The moisture sorption isotherm of the cross- linked gelatin was determined gravimetrically at25℃. The gel strength and the viscosity of solutions with different concentrations of cross- linked gelatin were determine…
Very small nickel oxide nanoparticles were prepared by a sol–gel procedure using nickel nitrate hexahydrate and ammonium hydroxide as precursors. The particles are in the range of 5 nm–11 nm. The x-ray diffraction(XRD) crystallography and high resolution transmission electron microscopy(HRTEM) were employed to charact…
A spiro-type quaternary ammonium salt, spiro-(1,1′)-bipyrrolidinium tetrafluoroborate(SBP-BF4) was successfully prepared by an economical and efficient three-step process comprising the cyclization reaction of 1,4-dibromobutane and pyrrolidine, and subsequent ion exchange pathway with KOH followed by neutralization re…
The conventional wisdom is that the distribution and sizes of reinforcements, as well as the bonding strength of the matrix–reinforcement interface tend to be the crucial factors in determining the resulting properties of composites: the optimum mechanical properties are likely to be achieved when fine and thermally s…
转变行为和极端高张力的导致转变的粘性(旅行) 的张力的性质钢(0.2C-2.0Si-1.8Mn ) 被不同的热处理为汽车应用调查。结果显示出那 F 旅行钢，作为原来的微观结构包含 as-cold-rolled 铁酸盐和珠泽铁的传统的旅行钢，由 M/RA 和 B 的分离粒子包围的 intercritical 铁酸盐的 equiaxed 谷物组成。相反， M 旅行钢，有是的马氏体的修改的帮助旅行的钢原来的微观结构，当原来的微观结构由铁酸盐的塑造板条的谷物组成，包含完整的马氏体由塑造板条的 martensite/retained 奥氏体和 bainite 分开了。大多数在 F 旅行钢的奥氏体是小粒的，当在 M 旅行钢的奥氏体是塑造板条的…
The composite Multi-walled carbon nanotubes/Polyacrylic acid(MWCNTs/PAA) was prepared by chemical functionalization, and Zn4O(1,4-benzenedicarboxylate)3(MOF-5) and hybrid materials MWCNTs/PAA/MOF-5 were obtained by solvothermal method. The resulted samples were characterized by XRD, FTIR, TG,HRTEM, the specific surfac…
High-performance solar-blind UV （ultraviolet） photodetectors （PDs） based on low-dimension semiconducting nanostructures with high sensitivity, excellent cycle stability, and the ability to operate in harsh environments are critical for solar observations, space communication, UV astronomy, and missile tracking. In thi…
A simple method for the preparation of dinitronaphthalene from the nitration reaction of 1-nitronaphthalene with NO2 as nitration reagent under the mild conditions has been successfully developed in this work. The results indicated that Ni(CH3COO)2� 4H2O catalyst shows better catalytic performances, and the con- versi…
一套概括答案为估计管道的最终的负担能力，任意的腐蚀形状使遭到了到联合内部压力，轴的力量和弯曲时刻被建议。在管道的纵、环绕的方向的各向同性、各向异性的材料特征也在建议方程被考虑。简化数字方法被用来解决概括表情。数字结果的比较基于概括答案，照原尺寸的试验性的结果被执行。预言的结果与实验结果相当同意很好。同时，最终的负担能力上的腐蚀形状和地点的效果被学习。
Facile and fast combustion method was used to synthesize Zn O and Ce-doped Zn O(CZO) nanocrystalline powders photocatalysts with different cerium concentrations(0.5 wt.%–10.0 wt.%) followed by calcination at 700 oC for 3 h. The prepared samples were characterized by a variety of characterization techniques such as X-r…
Reversible addition-fragmentation chain transfer(RAFT) mediated grafting of acrylonitrile onto Polyethylene/Poly(ethylene terephthalate)(PE/PET) composite fibers was performed using γ-irradiation as the initial source at ambient temperature. Different initial concentrations of 2-cyanoprop-2-yl dithiobenzonate were use…
The effects of p-In Ga N layer thickness on the performance of p-i-n structure In Ga N solar cells were investigated. Through theory calculation,it is found that the conversion efficiency of In Ga N solar cells decreases with the increasing of p-In Ga N thickness. The poor Ohmic contact properties of metal to p-In Ga…
Degradation behaviors and degradation mechanisms of bridged-grain (BG) polycrystalline silicon thin film transistors (TFTs) under DC bias stresses are studied and investigated. Compared to normal poly-Si TFTs, BG poly-Si TFTs exhibits better negative bias temperature instability (NBTI), better self-heating (SH) reliab…