Materials Literature
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Nickel as economical catalyst has been used in various process application. One process application that uses this catalyst is the steam reformer in PT PUSRI II Palembang, Indonesia as part of an overall process to produce syngas from natural gas. Through nickel catalyst, the conversion of steam reformer is definitely…
A systematic comparison of the accuracies of scalar diffraction integral and angular spectrum method with respect to FDTD calculations are done. Validity regions of the methods are derived and optimal method for each region is determined.
Oxisols and Ultisols of Thailand, generally have kaolinite as the dominant clay mineral. Surface charge properties of kaolinite in these soils have a major influence on chemical and physical properties of the soils yet a limited research has been done to determine the nature of the charge on soil kaolinites, especiall…
We report a theoretical investigation of thermal hysteresis in magnetic nanoelements. Thermal hysteresis originates in the existence of meta-stable states in temperature intervals which may be tuned by small values of the external magnetic eld, and are controlled by the systems geometric dimensions as well as the comp…
Cell encapsulation has been widely studied as an alternative therapy for almost every human diseases and disorders. This technique enables the inclusion of various types of living cells inside spherical systems which, among other capabilities, mimic the environment provided by the extracellular matrix. This new therap…
This paper presents an investigation into the evaluation of corrosion resistance of mild steel as a result of coating with two different silanes, bis[triethoxysilyl]ethane or octadecyltrimethoxy silane (a long aliphatic chain silane). The silanes were hydrolysed using water alcoholic mixture and the coatings were deve…
爆轰驱动过程中产生的高温高压气流对铝质膜片、激波管壁产生烧蚀和冲刷作用，以致激波管壁、端盖上附有氧化铝等杂质，而高温下AlO自由基在气体分子的高速碰撞下被激发并产生强烈的辐射，从而干扰了高温气体辐射光谱的分析。用爆轰驱动加热技术将空气加热到4000-7000K，利用多通道光学分析仪对AlO自由基辐射光谱进行分析，实验发现在460-530nm波长范围内有多支辐射非常强烈的AlO自由基B^2∑＋-X^2∑＋（T00-20689cm^1）带系辐射谱带，且每支谱带都由多个带头组成，带头间隔约为2nin，带头处于高频位置并向低频方向伸延。通过实验与理论计算相结合，重点分析了AlO自由基B^2∑＋-X^2∑＋矿带系辐射光谱的结构特征。AlO自…
\n\t\t\t\t\tSmall angle X-ray scattering (SAXS) is useful to explain the formation of microstructures and the mechanism of microphase separation in self-assembled blends and complexes. In our study, we have used SAXA to examine the ordered and disordered nanostructures as well as morphological transitions in block cop…
采用甘氨酸-硝酸盐法合成了钙钛矿结构LSCFM（y=0．20、0．35、0．50、0．65、0．80）材料。用直流四探针法测定了材料在100～800℃静态空气气氛中的电导率，结果表明，其导电行为符合小极化子导电机制，电导率随温度的升高而增大。电子跳跃能随Mn含量的增大而减小，而小极化子跳跃几率随Mn含量的增大而增大，使材料电导率随Mn含量的增大而增大。用碘滴定法测定了材料的氧非化学计量值，结果表明，氧非化学计量值随Mn含量的增大而增大，LSCFM（y=0．20）晶格内存在一定的间隙氧，而LSCFM（y=0．35、O．50、0．65、0．80）晶格内存在少量的氧离子空位。
In recent years, the usage of polymer nanocomposites has increased rapidly but although their functional properties are generally superior, often the relevant mechanical properties do not give sufficient consistency to satisfy the expectations of the end users. In most cases, the property variations come from the manu…
Bakalářská práce se zabývá přípravou a studiem objemového skla a tenkých vrstev systému Ge-As-Se. Tenké vrstvy byly připraveny technikou pulzní laserové depozice. U připravených tenkých vrstev byly pomocí spektrální elipsometrie s proměnným úhlem dopadu studovány reverzibilní i ireverzibilní fotoindukované jevy.
Corrosion of re-bars causes performance reduction of seashore concrete structures. Many methods have been developed to predict concrete durability associated with corrosion of re-bars. Two tests are widely used in practice, namely the immersion test and the electrical test. In the immersion test, much time is consumed…
Si3N4 particle reinforced MoSi2 composite powder has been successfully synthesized combustion synthesis method. XRD and SEM results showed that the combustion product was mainly composed by MoSi2 and Si3N4. The as-prepared Si3N4/MoSi2 composite powder has been pressureless sintered at 1600°C for 1h. The microstructure…
Nanoparticles (NP) and even microparticles (MP) are ubiquitous present in the food chain. They occur naturally (e.g. resulting from the biomineralisation process in plants) and/or can be added deliberately (e.g. to increase flavor or color in the so-called “nanofood”). However, because of proportional larger surface a…
Step-by-step procedure of fatigue allowable stress evaluation for transport airplane airframe structural elements is offered, allowing to present details and considerably to specify results of such evaluations. On an instance of an evaluation of fatigue allowable stress for the wing lower surface of modern regional pa…
The linear method of calculation of the loading consumption mode probability, indicators of the electrical supply system reliability is considered in the article. Conclusion about the likelihood-statistical loading model formation depending on an interval of the casual processes consideration and the technique of esti…
Chemical exchange saturation transfer (CEST) provides a novel contrast based on the chemical environment of protons. It has been shown its ability to detect the pH change in MRI. Here we try to reproduce the pH-sensitive contrast using our MR scanning system. Our study involves three parts: parameters optimization, in…
Microscopically in the development of hyper plastic processes in the endometrial is disrupted architectonics of functioning layers. On sections of endometrial undifferentiated basal and functional layer. The most characteristic feature of the process was an increase in stromal and glandular components. Iron acquired c…
Die vorliegende Dissertation beschäftigt sich mit der Komplexierung von dreiwertigen Actiniden bei erhöhten Temperaturen. Die Motivation der Arbeit ist es, ein besseres Verständnis der geochemischen Prozesse, die für die Migration von Actiniden im Nahfeld eines nuklearen Endlagers von Bedeutung sind, zu erhalten. Abhä…
We have studied the influence of the main process parameters on the formation of the diamond-like carbon films on alumina substrates deposited by microwave plasma enhanced chemical vapor deposition (MW-PECVD) technique. Process parameters include methane (CH4) concentration (0.5-5%), deposition pressure (10-50 torr),…