Materials Literature
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The paper reports on experimental study of the structure and microhardness of Fe-30%Cr8%Co hard magnetic alloy under comlex two-stage loading by tension and torsion . It was found that at all temperatures strain formed a gradient structure with a minimum grain size on the outer layer of the cylindrical surface of the…
Development of new pharmaceutical formulations based on using specific nanoscale carriers for improved drug delivery to target cells is one of crucial tasks of current pharmaceutics. Usage of such nanocomposites does not only extend the duration of action of drugs in the organism of patients, but also increases their…
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…
프탈로시아닌, 포르피린, 서브프탈로시아닌 및 퍼릴렌 화합물들은 광저장매체, 유기 태양전지, LCD, PDP, 반도체, 위폐 감별용 재료 등으로 응용된다. 본 연구에서는 퍼릴렌, 서브프탈로시아닌 및 포르피린을 프탈로시아닌 프레임에 가교 결합시켜서 프탈로시아닌계 하이브리드 유도체를 합성하였다. 합성된 하이브리드 시료들은 두 가지 다른 파장영역을 동시에 흡수하였다. 또한, 프탈로시아닌에 비하여 유도체의 도입으로 인하여 시료의 용해도가 향상되었으며, 치환된 유도체의 종류에 따라 Q-band가 장파장 영역으로 이동하는 정도가 상이하였다. 시료들의 화학적 특성 및 광학적 특성…
If all cells in a multicellular organism contain exactly the same genetic information, the question arises of how tissue types with distinct gene expression profiles are formed and maintained over the life of the organism. These different temporal and spatial gene expression patterns are thought to be built by activat…
본 연구에서는 가속된 이온이 전기장이 걸려있는 freestanding 단결정 실리콘 나노 박막에 충돌했을 때 발생하는 열-전계 전자 방출 특성을 여러 전계 및 열적 조건 아래 체계적으로 분석하였다. 이온 충돌에 의한 열-전계 전자 방출은 쇼트키 효과 (schottky effect)의 선형영역의 특성에 의해 예측된 바와 같이 전계의 세기가 증가할수록 선형적으로 증가했으며, 이온 충돌에 의해 발생하는 열에너지의 제곱에 비례하는 특성을 보여주었다. 이러한 특성들은 실리콘 나노 박막의 질량 분석기용 이온 검출기로의 사용 가능성을 보여준다.
A recent development in electron microscopy and diffraction is the achievement of ultrafast time resolution using high-repetition rate single electron sources and single-shot many-electron sources. Intrinsic heating mechanisms due to inter-particle Coulombic forces make it difficult to achieve large coherence lengths…
92 p. : ill. ; 30 cm%%%%L'objectif de ce travail est d'etudier la synthese et la caracterisation des catalyseurs nanostructures constitues de l'association de nanoparticules d'oxydes de metaux et d'evaluer leurs proprietes catalytiques. Quatre types de catalyseurs nanostructures ont ete synthetises par la methode sol-…
본 연구에서는 낮은 열전이 온도를 가지는 텅스텐이 도핑된 이산화바나듐(W-VO2)을 제조하였다. 텅스텐이 도핑된 이산화바나듐은 바나딜설페이트(VOSO4)와 중탄산암모늄((NH4) HCO3)을 전구체로 열분해 과정을 통해 제조하였다. 이에 대한 입자의 구조 및 열전이 특성을 FE-SEM, EDS, XRD, XPS, DSC 분석을 통해 조사하였다. 그 결과 텅스텐이 도핑된 이산화바나듐 입자의 형상은 판상형태로 텅스텐이 이산화바나듐 결정에 잘 도핑 되어 있음을 확인 하였다. 텅스텐이 도핑된 이산화바나듐의 결정 구조는 단사정으로 60 nm의 크기를 가지고 있었으며, 화학적…
Industrial nitric acid production by oxidation of gaseous ammonia with Ostwald procedure produces an unwanted by-product – colorless nitrous oxide, N2O. As emission of N2O represents a very serious problem due of its huge contribution to global warming, certain measures focused on its maximum reduction should be under…
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…
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…
In the second part of work, researches result of structure of rupture in various zones of destruction of samples of beryllium which tested for definition of fracture toughness of a material are described. In the first part of work results of researches of agency of a various structure factor and heat treatments on fra…
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…
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…
Conventional thermal barrier coatings(TBCs) consisting of a yttria stabilized zirconia(YSZ) ceramic coat and a metallic bond coat for industrial application cannot work long above 1 200 ℃.With aero-engines developing towards higher thrust-to-weight ratio,it is necessary to develop new ceramic coating materials with be…
Namen diplomskega dela je vpeljati in preveriti (validirati) analizno metodo za kvantitativno dolocitev vsebnosti glikola po standardni metodi ASTM E 2412:2010. S tem bi v laboratoriju podjetja Petrol d.d., kjer sem meritve opravljala, nadgradili tehniko za ugotavljanje glikola v rabljenih oljih. Do sedaj so imeli na…
This work deals with investigation of the interface between unidirectional E-glass fiber and epoxy matrix composites. The two parts in this work are: 1. A periodically constrained finite element (FE) model built as a Representative Volume Element (RVE). 2. A second FE model to predict the shear properties of the inter…
In the process of purification of biodiesel is of extreme importance washing methyl or ethyl ester rich- phase, since in conventional processes there is a great amount of water. During the washing is extracted primarily excess alcohol. Composition data for the washing process of biodiesel is still scarce in the litera…
Electronic and atomic structures of LiFe1/4Mn1/4Co1/4Ni1/4PO4 and LiFePO4 were investigated by using the first-principles density functional theory. Our calculations demonstrate that doping Mn, Co and Ni atoms at Fe sites of LiFePO4 enhances the electron localization at Fe sites, which leads to the metallic characteri…