Materials Literature
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A study using synchrotron radiation X-ray absorption spectroscopy at In L3-edge is presented, as a contribution to interpret the binding state of indium in natural chalcogenides considering the increase of applications of this scarce metal.
Magnesium alloys are excellent material candidate to reduce mass of automotive structures, and as such to meet the Department of Energy's targets in fuel economy and clean energy. However, magnesium alloys show poor ductility at room temperature, which is one of the most important impediments to achieving cost-effecti…
Results of laboratory researches are resulted according to cutting properties of a firm alloy of mark H05.
Polyhydroxyalkanoates (PHAs) are biologically derived polymers that have been shown to have properties similar to their petrochemical polyolefin counterparts. As such, PHAs are considered to be a true alternative for the latter which, in most applications, have limited use life span but a long post-use life causing a…
A new method for making of high-strength glued bondings is suggested by impact of constant magnetic field on polymer basis of glue composition, the influence of different factors was examined, an installation was created and set in motion in the working mode that allowed to get the constant magnetic field with the str…
he purpose of the present work is to investigate the dynamic compressive behavior of as-received bearing steel, SAE 52100 at different strain rates (0.001s-1 - 3000s-1). Quasi-static tests of the material are conducted on universal testing machine, whereas, the experiments at high strain rates are performed on split H…
La toxicite des nanoparticules est un sujet crucial. La production et l'utilisation de nanoparticules etant en constante augmentation, il est necessaire de connaitre leurs effets sur l’organisme. Dans ce travail de these, nous avons etudie les effets des proprietes de surface et de taille de nanoparticules d’oxyde de…
The methods of growing single crystals. A variant of the design of microwave high-install without interrupting the growth process for growing single crystals.
The increasing demand for electrical energy requires the development of power plants with high efficiencies and low emissions. Hybrid power plants consisting of an SOFC system coupled with a gas turbine promise to fulfil both requirements reaching electrical efficiencies above 60% [1]. They can also be used for a larg…
Microbiologically influenced corrosion (MIC) can lead to localized material degradation rates that are orders of magnitude higher than would normally be expected from standard, abiotic corrosion. This can lead to the premature failure of a wide range of important structures that can not only be costly to repair, but i…
Isoprenoids are the largest family of biologically active compounds, synthesized by five carbon subunits namely isopentenyl pyrophosphate (IPP) and dimethylallyl pyrophosphate (DMAPP). For long time the mevalonate-dependent (MVA) pathway has been considered as the sole source of IPP and DMAPP, until recently a new non…
Photoinduced reduction of surface states in the visible light sensitized photocatalyst Fe doped ZnO
It is shown that applying of a factor of stress intensity is very important at an estimation and survivability of welded metal constructions. Some methodical examples of defi nition of stresses are solved. The calculation formulas of stress intensity factors are determined on the basic of the fi nite element method. T…
为了提高MNOz／TiO2催化剂催化氧化NO的活性，在载体TiO2上负载醋酸锰的同时掺杂了一定量的硝酸铈，构成了Ce（1）Mn（3）Ti催化剂，并对催化剂进行XRD、BET和XPS等表征。重点考察了H2O和SO2对催化剂活性的影响，通过FT-IR、SEM和BET等表征手段对毒化前后的催化剂组成及结构进行了分析。结果表明，Ce（1）Mn（3）Ti催化剂具有较好的活性，在空速41000h^-1、NO体积分数为300×01^-6及O2含量10％的条件下，反应温度200℃时NO转化率可达58％，250℃时NO转化率达到最高值85％。单独加入4％H2O使得催化剂活性降低，升高反应温度，H2O对催化剂的影响减弱；同时通入4％H2O和100×1…
A fiber-level simulation of paper forming in a twin-wire roll former is conducted with a furnish typical of fine paper. A mix of bleached kraft softwood and hardwood pulps was chosen, each refined to different levels. The resultant web structure obtained from the couch roll was determined from these numerical experime…
Представлены результаты 3D-моделирования процесса деформации слоя геосреды в условиях разрывного горизонтального сдвига основания. Рассмотрены закономерности формирования полос локализованного сдвига и исследовано изменение их формы с глубиной. Получена и проанализирована пространственная структура зон локализации.
Quantum dots in the Si/Ge and InAs/GaAs materials systems are examined by means of photoluminescence. The spectroscopic study of Si/Ge quantum dots has demonstrated two different radiative recombination channels in the type II band alignment: The spatially direct transition inside the dot and the spatially indirect tr…
Sulfur removal in crude oil, is one of most important application when designing catalytic material to target hydrodesulphurization reactions. This particular study comprehends the quantum computational calculations for the transitional states during the HDS reaction in the molecular model of MoS2/Co9S8, which is a th…
Kainate, a glutamate receptor agonist, is a potent neuroexcitatory agent that produces epileptiform activity and selective neuronal degeneration. Binding studies using neuronal membrane homogenates or brain sections have identified sites having either high or low affinity for [3H]kainate. Here we report the cloning of…
The structural integrity and/or electrical or thermal conductivity of a component can be improved with the optimal topological placement of very high strength or very high conductivity nanofibers. This thesis presents a heuristic procedure for the estimation of the optimal location for the nanofibers based on topologi…