Materials Literature
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Mechanisms of destruction of aviation motors advanced materials (aluminum alloy AMg6, pure titanium Grade-4 and titanium alloy TiAl6V4) are studied in terms of high- and gigacycle fatigue, including the influence of preliminary dynamic loading on the fatigue life. The theoretical understanding of the kinetics of fatig…
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 structure and tensile properties of diffusion bonding of hard magnetic alloy 25H15K with low carbon steel 3 processed by pressure welding in vacuum using interlayer of nickel. The microstructure of the compounds was investigated by scanning electron microscopy, electron microprobe analysis of the data presented, a…
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The approaches to the selection of the optimal chromatographic conditions to assess the content of high molecular weight aggregates in glatiramer acetate - compounds belonging to nonbiological medicines of complex chemical structure - are described. It is found that accelerated aggregate formation occurs under stringe…
Reverse gyrase is the only known topoisomerase enzyme with positive supercoiling activity on covalently-closed DNA. This positive supercoiling is required to prevent DNA from denaturation at high temperatures. The gene that codes for this protein is present in all hyperthermophiles and absent from all mesophilic and t…
ISSN:2339-5427
Scrophularia lucida wird, wie auch andere Arten der Gattung Scrophularia, seit langer Zeit in der traditionellen Medizin zur Behandlung von entzündlichen Erkrankungen wie Ekzemen und Psoriasis angewendet. Aktivitätsgeleitete Untersuchungen zeigten einen inhibierenden Effekt des methanolischen Extraktes auf einen wicht…
This work presents the results of experimental studies and computer modeling of the crystallographic texture evolution in the billets of titanium alloy VT6, subjected to plane rolling in the coarse-grained and ultrafine-grained (UFG) states. UFG state has been formed by the method of multiaxial isothermal forging at 6…
Import 22/07/2015
Coating disbondment on pipelines is a common phenomenon that leads to exposure of the pipeline metal to the surrounding soil and ground water solutions. The exposure of pipelines to those corrosive environments is associated with development of corrosion and Stress Corrosion Cracking (SCC) on the pipeline steel. Despi…
Within the packaging industry, the increasing demand for sustainable packaging is driving research towards renewable coating materials for paper or paperboard with high barrier properties against gas, water vapour and odours. Poly(vinyl alcohol) (PVOH), a water soluble and biodegradable polymer, is a real option for s…
The hindrance effect for corrosion of some drugs on metal in 0.5M hydrochloric acid was done by chemical (WL) and electrochemical(EIS, EFM, tafel polarization) techniques. Themorphology of surface utilized by EDX and electron scanning microscopy (SEM) method. From the data obtain the efficiency inhibition rise with hi…
A major part of the world’s iron production is presently using fossil reductants. The climate effect would be improved if renewable raw material could be used instead. One way could be to gasify biomass and use the gas to produce DRI (Direct reduced Iron). This is studied in a cooperative project. LTU, MEFOS, ETC and…
Solar energy holds great potential in securing humanity’s energy future in a sustainable manner. Unfortunately, the costs of silicon photovoltaics continue to impede the use of solar energy. Polymer solar cells (PSCs) can make solar energy more affordable due to their lower production costs. However, PSC efficiencies…
In the last few years biosensors have been used broadly in diagnostics, especially in application of point-of-care (POC). POC diagnostics required to be easy-to-use and affordable. Microfluidic paper-based analytical devices (µPADs) have been one of the POC diagnostic devices. In order to fabricate µPADs are developed…
In this paper, predictions of failure strength of carbon-fiber laminate composites are attempted using an improved continuum damage mechanics (CDM) model with emphasis on the material nonlinearity of the fiber, shear stiffness reductions, the damage contribution of matrix cracks in adjacent layers and the multi-scale…
Atomic layer deposition (ALD) enables uniform and conformal deposition of sub-nanometer thick films over large substrate area, hence is the most suitable technique for deposition of critical features in modern semiconductor fabrication. Compared to other transition metal nitrides, reported studies on zirconium nitride…
The performance of powertrain components and rock tools relies on the inherent strength and hardness of ferrous martensite. Currently the industry uses experimental measurements of surface hardness ...
本文的研究工作利用NMR、EPR以及UV-vis等光譜方法配合DFT理論計算，比較一系列平面及馬鞍型變形鐵卟啉中軌域作用及電子組態的差異。2003年陳如珍教授發現在高自旋平面三價鐵卟啉中配位數的變化導致分子對稱的改變，使得金屬dz2與卟啉環a2u軌域之交互作用存在於五配位錯合物，當配位數變為六配位時此作用消失；並結合理論計算及順磁NMR光譜證明所謂“對稱開關”的現象。本文將對三價鐵卟啉軌域交互作用及電子組態的研究擴展到中自旋馬鞍型變形三價鐵卟啉，Fe(OETPP)ClO4。發現不同於平面的系統，卟啉大環產生馬鞍型變形後分子對稱降低使得金屬dx2-y2與卟啉環a2u能夠產生交互作用，雖然dz2與卟啉環a2u軌域之交互作用仍然存在，金…