Materials Literature
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X-ray Rheology is an experimental technique which uses time-ressolved x-ray scattering as probe of the molecular level structural reorganisation which accompanies flow. It provides quantitative information on the direction alignment and on the level of global orientation. This information is very helpful in interpreti…
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space grou…
Despite the immense progress in established surgical therapies, cardiovascular diseases remain the leading cause of death in the Western society. Coronary artery bypass surgeries or balloon angioplasties represent the gold standard for cardiac infarction cure. Unfortunately, these procedures have drawbacks that make a…
研究了纯TEA、纯MAO和TEA/MAO混合助催化剂对二醚类Ziegler-Natta催化剂和二酯类Ziegler-Natta催化剂催化丙烯聚合的影响,并用DSC、GPC和WAXD等表征手段对聚丙烯结构进行分析.结果表明:纯TEA、纯MAO以及任意比例的TEA/MAO混合助催化剂均能催化Ziegler-Natta催化剂,表现出较高的聚合活性;此外,随着TEA/MAO混合助催化剂中MAO含量的增加,聚丙烯的结晶温度、熔点、结晶度和分子量均呈下降趋势,而晶型不发生变化;另外,相同聚合条件下,二醚类Ziegler-Natta催化剂比二酯类Ziegler-Natta催化剂具有更好的聚合活性、更高的聚丙烯分子量以及更宽的分子量分布.
Polyethylene is a low cost versatile polymer used in numerous applications, ranging from automotive parts to carpet fibers, food containers, toys, stretch film/shrink film, diapers and trash bags, whose world demand is approximately 76 million metric tons per year. Together with polypropylene, it represents almost two…
HPW/BMMs catalyst was prepared by supported phosphotungstic acid on mesoporous SiO2 with two different mesoporous structures via impregnation method,and characterized by means of XRD,FTIR,nitrogen adsorptiondesorption,TG and SEM.The effects of solvents,such as water,ethanol,acetone and acetonitrile,on the structure an…
Vidros do sistema Li2O CaO SiO2 podem apresentar algumas propriedades potencialmente interessantes, dentre elas, a possibilidade de se obter fases cristalinas interdispersas (tipo eutético) que levem a altos valores de tenacidade pelos vitrocerâmicos resultantes de cristalização controlada. No entanto, há pouquíssima…
Huminstoffe sind in der Biosphäre allgegenwärtig. Sie spielen eine wichtige Rolle in biologischen Prozessen in Böden, Flüssen und Meeren (Pflanzenwachstum und Pflanzenatmung, Metall–Aufnahme durch Organismen, katalytische Polymerisation und aquatische Redox–Reaktionen). Sie kontrollieren den Transport von organischen…
The prospects for the use of vacuum ion-plasma methods for the formation of heat-resistant coatings on the gas paths details of aviation and space technics were considered. The research results of heat-resistant coatings were analyzed. The principles of formation of heat-resistant nanocomposite coatings on the «NIU «M…
采用同向旋转双螺杆挤出机制备了聚乳酸/有机改性蒙脱土(PLA/OMMT)体系;通过差示扫描量热和偏光显微镜研究了不同含量的OMMT对PLA结晶形态和结晶行为的影响.结果表明:纯PLA结晶时间接近30 min;加入OMMT后能够明显提高结晶速率,改善球晶尺寸分布.但是OMMT的加入量存在阈值,超过3％时,反而会使体系的成核速率以及结晶速率下降,球晶尺寸分布开始变宽,而且整个体系的结晶度也会降低.
Poly ethylene glycol (PEG) is widely used to fabricate silver nanoparticles (NPs), because it can not only stabilize but also nucleate and grow silver NPs.The conformation of PEG, which is dependent on molecular weight and the type of end group, has a crucial role in the process of silver NPs fabrication.Here, the mol…
Gd2O3:Eu3+ phosphors were synthesized by hydrothermal method using aqueous ammonia and ammonium bicarbonate as the precipitation agents respectively. TG-DTA, FT-IR and XRD were used to analyze the thermal decomposition behavior of hydrothermal precursors and the formation process of target product. SEMwas used to char…
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space grou…
The starting point of modern biosensing was the application of actual biological species for recognition. Increasing understanding of the principles underlying such recognition (and biofunctionality in general), however, has triggered a dynamic field in chemistry and materials sciences that aims at joining the best of…
第１部 ロシア研究（事実と記録のあいだ：ロシア／ソ連ドキュメンタリー映画をめぐる言説と実践について；過去への回帰—歴史に問いかけるということ） 第２部 ドイツ研究（ドイツ記録映画史序説；ドイツ民主共和国の崩壊と社会主義の体験） 第３部 東中欧・バルカン・バルト研究（『シベリアのレッスン』：ドキュメンタリーフィルムとポーランドの「小さな祖国」；チョコスロヴァキアという国があった—国際政治における「小国」のジレンマ；ハンガリーのドキュメンタリー映画にみる「お国柄」—体制転換後の記憶と視点の変容；体制転換後のブルガリア—変わったもの、変わらないもの；バルト諸国・独立と社会の変容—大国の狭間で；コソボ紛争の舞台裏—「第４の席」）
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space grou…
Density function M06 method has been used to optimize the geometries of camptothecin-cytosine at 6-31+G* basis.Finally, thirteen stabilized complexes have been obtained.Theories of atoms in molecules (AIM) and natural bond orbital (NBO) have been utilized to investigate the hydrogen bonds involved in all the complexes…
Lange Zeit stand die Gruppe der Archaeen nicht im Fokus der Wissenschaft bis Woese sie 1987 als dritte Domäne des Lebens definierte. Danach gewann die Arbeit mit Archaeen mehr und mehr an Bedeutung, da sie Eigenschaften besitzen, die andere Organismen nicht aufweisen. In dieser Studie wird der halophile Virus ɸCh1, de…
Novel two-dimensional materials with weak interlayer Van der Waals interaction are fantastic platforms to study novel physical phenomena. This thesis describes our investigation on two different Van der Waals materials: graphene and bismuth selenide with calcium doping (CaxBi2-xSe3, x as the doping level) in the topol…
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space grou…