Materials Literature
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Neutron spin echo (NSE) and small angle neutron scattering (SANS) are used to investigate the structure and short-time dynamics of lysozyme protein solutions with the presence of the equilibrium clusters. The Q dependent collective diffusion coefficient indicates there are no significant inter-monomeric-protein dynami…
Dumping of wastes at ocean 15 strongly prohibited from 2012 by London Dumping Convention. So, treatment of food waste leachate at ground is needed urgently. As the solution for above mentioned problem, we suggest the food leachate resources by using Upflow Anaerobic Sludge Blanket(UASB) process. The aim of this study…
Y was used as a dopant in preparing conductive powder to improve its performance. Y and Sb co-doped SnO2 conductive nanoparticles were prepared by the complexation-coprecipitation method with Sn,Sb2O3 and Y2O3 as the raw materials. Crystal phase,thermal behavior and structure of the prepared conductive nanoparticles w…
利用熱碳還原法在溫度550-750℃，以Ar為載流氣體生長Ge摻雜In2O3奈米線和In2Ge2O7奈米線並藉由調整Ge/In2O3粉末重量比例作為參數，調控生長Ge摻雜In2O3奈米線和In2Ge2O7奈米線。Ge/In2O3粉末重量比例範圍0.1-0.3％生長鍺摻雜氧化銦奈米線，0.4-10％鍺摻雜氧化銦奈米線和In2Ge2O7奈米線會混合生長，當Ge/In2O3粉末重量比例為10％只有In2Ge2O7奈米線生長。鍺摻雜氧化銦奈米線和In2Ge2O7奈米線生長機制皆遵循自我催化VLS機制。隨著氧化銦奈米線鍺含量增加，誘發PL光譜和光學能隙往高能量位移。此現象可以用壓縮應力在氧化奈米線所造成的影響和Burstein –Moss…
Influence of the structural parameters (namely, angle of rise, half structural period, volume fraction of metal inclusion, columns shape factor, thickness) and the dielectric dispersion function on the optical activity of axially excited chiral nano-sculptured copper thin films are investigated for both s and p linear…
利用OP-10/正丁醇/环己烷微乳体系制备出固体超强酸Ce4＋-SO42-/SnO2.以乙酸正丁酯合成为探针反应,得出Ce4＋-SO42-/SnO2的优化制备条件：R=65∶100（表面活性剂∶水）、陈化时间12 h、Ce（SO4）2.4H2O占8%、浸渍浓度3 mol/L、焙烧温度550℃、焙烧时间3 h.并采用XRD、FTIR、TG-DTA和SEM表征技术对该催化剂的结构进行研究.
Peculiarity of chemical modification of epoxy compositions by glycidylic ethers of phosphorus acids was studied. Heat and fire resistant compositions with high physico-chemical characteristics were developed.
Safe and effective load of nuclear reactor fuel cells demands qualitative and quantitative analysis of relations between coolant temperature in fuel cell outlet temperature measured by thermocouple and middle temperature of coolant in thermocouple plane position. In laboratory at Insitute of thermal power engineering…
Amylase and cellulase production from Bacillus licheniformis P1 and Bacillus amyloliquefaciens UMAS 1002 was enhanced using Submerged Liquid Fermentation (SmF) with respect to the use of types of substrates, time course of incubation and volume of inoculums. Banana peel was chosen as the best substrate for both enzyme…
本文对La2/3Sr1/3MnO3单晶中b和a（c）轴方向的磁热效应进行了研究,由于晶体的磁晶各向异性,磁热效应表现出一定的各向异性.通过不同温度下的等温起始磁化曲线的实验分析表明,在外加场为10kOe的情况下,b和a（c）轴方向的磁熵变-ΔSM（H）在370K达到最大值,分别为1.942Jkg^-1K^-1和1.873Jkg^-1K^-1.低场下较大的磁熵变是由于磁化强度随外场迅速变化以及自旋-晶格的耦合造成的.La2/3Sr1/3MnO3单晶在低场下表现出相对较大的磁热效应,表明其在磁制冷方面有一定的潜在应用价值.
采用微波加热法成功制备了YVO4：Eu3＋荧光粉，分别用x射线衍射（XRD）、扫描电镜（SEM）、激光粒度仪对产物的晶相、形貌和粒度进行表征，用光致发射光谱（PL）对产物的发光性能进行研究。结果表明，样品为立方晶系YVO4，形貌完整，粒度分布均匀，D50=2．4μm，PL谱呈现Eu3＋的特征发射峰，最强峰为619nm的红色发射峰。
我国是煤炭开采和消费大国，煤炭在我国一次能源的生产和消费结构中均占70％左右。由于石油、天然气资源短缺，其他新能源难以大规模发展，而煤炭资源丰富、价格稳定，其在我国能源消费中的比重虽然会逐年下降，但其主导地位在50a内仍然不会改变。因此，如何高效、清洁、合理地使用煤炭资源是一个十分重要的问题。
凹凸棒石是一种链层状结构的含水镁铝硅酸盐矿物。凹凸棒石粘土是以凹凸棒石为特征组分的粘土,是一种重要的稀缺非金属矿物材料,由于凹凸棒石特殊的晶体结构和性质,使这类粘土具有特殊的应用性能。
目的钒具有胰岛素样作用,合成具有大共轭环状结构四-β-（邻苯二甲酰亚胺甲基）酞菁钒配合物,测试其光谱性质。方法以邻苯二甲酰亚胺甲基邻苯二甲腈为原料,采用固相缩合法合成得到标的物四-β-（邻苯二甲酰亚胺甲基）酞菁钒配合物（简称VOPcP4）,并通过红外吸收光谱、紫外-可见电子吸收光谱和元素分析进行表征。测试标的物在不同溶剂和不同浓度中的紫外-可见电子吸收光谱。结果标的物VOPcP4的Q带电子吸收光谱λmax值在供电子能力DMF、DMSO等极性溶剂中比在无供电子能力弱极性甲苯溶剂中略向蓝移。结论标的物酞菁钒配合物的Q带λmax值基本上随溶剂偶极矩增大而略向蓝移,在DMF溶液中浓度在0.2～1.8×10-5mol.L-1范围内基本没有聚…
Pure SnO2 and Ce-doped(1%,4%,7%,10% in mass ratio) SnO2 powders were prepared by a simple sol-gel method.The as-prepared samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),and Brunauer-Emmett-Teller(BET) specific surface area analyzers.Results showed that the 7% Ce-doped sample has…
采用中频感应熔炼-快淬炉制备了La15-xNdxFe14Ni64Mn5B2（x=0、2、4、6）储氢合金。扫描电镜（SEM）及能谱（EDS）分析表明,这些合金由（La,Nd）Ni5相、（Fe,Ni）相和（La,Nd）3Ni13B2相组成。X射线衍射（XRD）分析表明,Nd含量对合金的相组成没有影响,但随Nd含量的增加,衍射峰向高角度方向轻微位移。电化学测试表明,随x值的增大,合金电极的放电容量及高倍率放电能力（HRD）先增加后减小,x=2时的放电容量（302mAh.g-1）最高,HRD值（1050 mA.g-1放电时为65.6%）最大。充放电循环稳定性随x值的增大而增加。适量的Nd替代La有利于改善LaFeNiMnB储氢合金的综合…
The analysis of application possibility for the offered finite-element model in calculations of bridge spans is offered in this article.
将IrO2掺杂到固相反应法制备的La0.7Ca0.2Sr0.1MnO3（LCSMO）微粉中,制备了（1-x）La0.7Ca0.2Sr0.1MnO3＋xIrO2（LCSMO/IrO2）复合体系。通过X射线衍射（XRD）、振动样品磁强计（VSM）以及直流四探针法测试,对复合材料的结构及性能进行了研究。结果发现,在复合体系中,一部分Ir4＋离子取代了B位的Mn4＋离子,另一部分以IrO2氧化物的形式存在于颗粒的边界处。随着IrO2掺杂量的增加,样品的比饱和磁化强度（σs）快速下降,而居里温度（TC）先下降后上升,电阻率也发生显著变化。与此同时,IrO2的掺杂使样品的低场磁电阻效应（LFMR）和高场磁电阻效应（HFMR）都有所增强,在H=…
The paper presents some of the most recently used materials and welding technologies suitable for application in steam boiler power plants. It provides an insight into important properties of these materials and some aspects of weldability. Moreover, the authors explained the most important mechanical engineering tech…
In the experiment,cottonseed meal and cottonseed shell were used to induce urinary calculi of male fine-wool sheep in order to investigate the pathogenic factor.Serum and urine of the stone sheep were detected to observe the morphology change of urine crystal and urinary tissues.Furthermore,X-ray spectrum analysis,X-r…