Materials Literature
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Pure, sulfur rich and wurtzite phase CdS nanoparticles with average size ~4.7 nm were prepared in aqueous solution using thioglycerol as a capping ligand.Approximately 542 molecules of thioglycerol molecules were present on the surface of each CdS-TG nanoparticle.CdS-TG nanoparticles can trap a large amount of water m…
Ballistic parameters have been studied on combustion of systems composed of salts of 5,5’-azotetrazole and active binder including active plasticizers including nitro-ester, nitro-amine, azido energetic groups was studied in the pressure interval 0.1-20 MPa. Effect of compounding as well as the chemical nature of the…
采用Q-P-T工艺对20SiMn2MoV钢进行热处理，利用扫描电镜、透射电镜研究其微观组织，使用XRD分析残留奥氏体的含量，并通过拉伸试验、冲击试验研究了Q-P-T工艺对钢力学性能的影响。结果表明，20SiMn2MoV钢经Q-P-T处理获得了板条马氏体＋残留奥氏体＋弥散析出碳化物的组织，残留奥氏体含量为4％～7％。淬火介质温度越高，残留奥氏体含量越高，钢的塑性、冲击韧性越好。碳分配时间应适中，过短则奥氏体稳定化不够，过长则发生碳化物析出及残留奥氏体分解。当淬火介质温度为90℃，碳分配60s时，钢的抗拉强度为1344MPa，伸长率达18．8％，强塑积为25267MPa·％，具有优良的强塑性匹配。
In this work dependence of structure and properties of yttrium-based Arc-PVD coating from their deposition parameters was studied.
본 연구에서는 메탈로센 폴리올레핀(metallocene polyolefin, me-PO)과 점착부여제(tackifier)를 이용해 열용융형 감압접착제(hot-melt pressure sensitive adhesives, HMPSAs)를 제조하여 물리적 특성을 확인하였고, me-PO가 HMPSAs의 용도에서 스타이렌계 블록 코폴리머(styrenic block copolymers, SBCs)를 대체하여 사용 가능한지에 대해 고찰하였다. 또한, me-PO를 베이스 폴리머로 사용한 HMPSAs의 성능을 최적화하기 위하여 점착부여제가 가져야 할 특성을 알아보고자 하였다. m…
ОСОБЕННОСТИ ДИСКУРСИВНОСТИ АНГЛИЙСКОЙ ОДЫ XVII-XIX ВЕКОВ Статья посвящена изучению особенностей дискурсивности английской оды XVII-XIX веков с точки зрения когнитивно-прагматического подхода. В статье рассмотрено само понятие дискурсивности, выделены основные подходы к формулированию понятий композиции и архитектоники…
Oxides of nitrogen (NOx) emitted from diesel engines consist of nitric oxide (NO) and nitrogen dioxide (NO2). Typically, NO2 emissions from diesel engines contribute up to 20%-30% of total NOx at low load and approximately 5% at medium to high load. Recent research into H2-diesel dual fuel engines reported the signifi…
The effects of the addition of Co on the martensitic transformation and Curie transition temperatures of polycrystalline Ni 46-x Cu 4 Co x Mn 33.5 Ga 16.5 (x = 0, 1, 3, 5) alloys are investigated. An abrupt decrease in the martensitic transformation temperature and an obvious increase in the Curie transition temperatu…
In this research, the effect of catalyst type on the CNTs synthesis was investigated. The carbonnanotubes (CNTs) were produced on stainless steel substrates and two of catalyst with differentcharacteristics by using Thermal chemical vapor deposition (TCVD) method. The catalysts have theimportant role for the growth ca…
以蒜（Alliu msativum）苗叶渣为吸附材料，建立吸附率对Cr^6＋浓度、蒜苗叶渣加入量、溶液pH值、吸附温度及吸附时间5个影响因素的二次回归正交旋转组合模型，研究蒜苗叶渣对重金属离子Cr^6＋的吸附作用。从模型推知，pH值为5、温度40℃、时间2h、浓度40mg·L^-1、加入量0．5g时达最大吸附率94．91％。试验结果表明，蒜苗叶渣可以用来吸附低浓度含铬废水。Langmuir和Freundlich等温吸附模型都可以描述C，。在蒜苗叶渣上的等温吸附行为，其中Langmuir较Freundlich更为拟合。蒜苗叶渣吸附Cr^6＋的动力学试验表明，吸附过程符合二级动力学模型，说明该吸附过程为混合吸附，以化学吸附为主，物理吸…
RNiO3 perovskites (R=rare earth) are one of the most interesting compounds in condensed matter physics presenting various unusual physical properties. The detailed electronic structure of these materials are very controversial at the present time. The charge transfer energy and the d-d Coulomb interaction are the two…
본 연구에서는 여러가지 메탈로센 촉매 및 trityl tetrakis(pentafluorophenyl)borate/triisobutylaluminium 공촉매 시스템을 이용하여 에틸렌, high α-olefin 및 divinylbenzene으로 구성된 삼원공중합체를 중합하였다. 우선 삼원공중합체 중합에 있어서, 최적의 촉매를 확보하기 위해 rac-Et(Ind)2ZrCl2, rac-SiMe2(Ind)2ZrCl2, rac-SiMe2(2-Me-Ind)2ZrCl2 등의 메탈로센 촉매들과 trityl tetrakis(pentafluorophenyl)borate/ triiso…
The synthesis of sodium salt of poly-2-acrylamido-2-methyl-1-propanesulfonic acid in aqueous medium using atom transfer radical polymerization has been considered. The obtained meanings of effective hydrodynamic radii indicate small polydispersity of synthesizing polyelectrolytes.
The motion of the hovercraft platform in microfine layer of broken ice is considered. The solution of the plane problem on the interaction of a plane contour composed of the surface of the flexible protection with broken ice is given. The analytical data for the constituents of the medium resistance while the platform…
les traumatismes pénétrants du pelvis ou plaies périnéo-pelvi-fessières sont des lésions extrêmement graves imposant d'une part un bilan lésionnel initial le plus complet possible, d'autre part le respect de certains principes thérapeutiques • un parage et un drainage très large quel que soit le type de lésion, • une…
有装载数量的不同 Ba 的一系列 Ba/CeO2 催化剂被早期的湿受精准备。他们的 NOx 吸附行为在下面没有并且 NO+O2 条件被调查由在 situ 飘移。NOx 在催化剂的表面上在 Ba 和 Ce 地点上在亚硝酸根和硝酸盐形式被吸附并且存储，这被发现。不太热地稳定的 BaCO3 被建议是为套住的 NOx 的主要活跃阶段。当 O2 不在时首先作为一个氧供应商服务的 Ceria，和对 Ba 地点上的硝酸盐的从亚硝酸根的反应是在这种情况中的关键步。然而，面对 O2，气体的 O2 成为了主要的氧来源。催化剂的 NOx 吸附能力被 Ba 内容统治。而且，在地点被发现比那些低的 Ce 上形成的亚硝酸根和硝酸盐的稳定性在 Ba 上形成了在…
Tematem me bakalařske je připrava koloidnich castic nikelnatých. Tyto castice byly připravovany hydrolýzou chloridu nikelnateho ve vodě za pomoci mocoviny a nasledna redukce tetrahydroboritanem sodným. Byl sledovan vliv stalibizatorů (želatiny, polyakrylove kyseliny a polyvinylalkoholu) na velikost vznikajicich castic…
在此研究中，將射頻濺鍍機(RF-sputter)成長出的金屬前驅物層(glass/mo/ZnSn/Cu)，放入緊密式的石墨盒中，填入適量地硫粉後，利用快速熱退火系統(RTP)進行高溫硫化製程，達到無毒且快速的CZTS薄膜製作。利用調整與設計實驗參數來成長出高品質的CZTS薄膜，並進一步探討與分析硫化製程參數對薄膜特性的影響。此外，探討不同銅含量的金屬前驅物層對薄膜特性的影響，其組成比控制在Cu/Zn+Sn=0.7~1.2範圍內，發現出薄膜中銅的含量對於CZTS 薄膜的特性有很大的影響。從中利用掃描式電子顯微鏡(SEM)、感應耦合電漿質譜分析儀(ICP-MS)、X光繞射儀(XRD)、拉曼光譜儀、紫外光/可見光光譜儀(UV/VIS)和…
La1-x Cax MnO3 (x=0-0.3) perovskite-type oxides were synthesized by citrate sol-gel method. The physical and chemical properties were characterized by X-ray diffraction (XRD), Brumauer-Emmett-Teller method (BET), X-ray photoelectron spectroscopy (XPS), NO+O2 -TPD (temperature-programmed desorption), activated oxygen e…
The freshwater cyanobacterium Microcystis aeruginosa has been extensively studied. The use of strain M•TY-1in our laboratory is to produce MC-LR. However, the fractions without MC-LR was not studied. It is known that Microcystis aeruginosa produces many classes of natural products. Several hypotheses on the function o…