Materials Literature
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The interatomic distance distribution, P(r), is a valuable tool for evaluating the structure of a molecule in solution and represents the maximum structural information that can be deterministically derived from solution scattering intensities, I(q). While P(r) is related to the Fourier transform of I(q), it unfortuna…
In view of the wide use of butoconazole nitrate in practical gynecology, a method for determining this drug in the blood of experimental animals has been developed based on the capillary electrophoresis technique. The samples were prepared using the sedimentation of plasma proteins by acetonitrile. The separation was…
Nanotechnology is the science that studies, designs, synthesizes, manipulates and controls matter in a nanometric scale. This includes concepts such as nonoelements, nanomaterials, nanosensors and nanoarrisers as elements that deliver medications to specific targets, elements used in the early detection of tumor lesio…
In this thesis the adsorption properties of carbon monoxide (CO) on the epitaxial fcc-Co/Cu(100), Ni/Cu (100) and Cu/fcc-Fe/Cu(100) systems are reported.The fcc-Co/Cu(100), Ni/Cu(100) systems are known to exhibit metallic quantum well (MQW) states at energies 1 eV or greater above the Fermi level, that disperse upward…
The applicability of the kinetic analysis of data obtained by non-isothermal differential scanning calorimetry (DSC) is discussed. Using different heating rates, the crystallization kinetic parameter of a glassy system can be calculated in sequences. Theses parameters include the activation energy of crystallization E…
The efficient utilization of cellulosic biomass is limited by the selective conversion of fructose, the dominant sugar in cellulose, to 5-Hydroxymethylfurfural (HMF). HMF is a platform chemical for the production ofuseful intermediates. It can be formed in homogeneous metal chloride/ionic liquid systems. In industrial…
The main indices of desublimator operation have been determined and the program of commercial tests has been developed. By the results of the experimental investigations the quantitative estimations of the influence of desublimator operation mode on desublimation degree and bulk weight of uranium hexafluoride UF were…
Solid-state nuclear magnetic resonance (SSNMR) is an important tool for the study of structure, function and dynamics of many chemical and biological systems. By using this technique we are able to study molecules that are insoluble or would not be in their native state when dissolved in solution. This is of particula…
Microsecond long Molecular Dynamics (MD) trajectories of biomolecular processes are now \npossible due to advances in computer technology. Soon, trajectories long enough to probe \ndynamics over many milliseconds will become available. Since these timescales match the \nphysiological timescales over which many small p…
This work focussed on how tubular steel structures similar to that in frontal car frames deform under crash conditions. The novelty comes from finding three crash modes: axial crush, transitional and global bending. Each mode was categorised by reaction force and energy absorption, this allowing for better structural…
Conference Theme: Converging frontiers in biomedical engineering from novel research to patient benefits
The composition and quality of plasma sputtered thin films depends on the properties of the plasma. To investigate these phenomena, theoretical and experimental techniques have been used to characterize the plasma. Langmuir probe has been used to investigate the plasma’s electron temperature, ion density and the elect…
We studied the photochemical reactivity of 2-alkylamino-3-bromo-1,4-naphthoquinones, 2-alkylamino-3-chloro-1,4-naphthoquinones, and 2-alkylamino-1,4-naphthoquinones. In general, 2-alkylamino-3-bromo-1,4-naphthoquinones and 2-alkylamino-3-chloro-1,4-naphthoquinones undergo dealkylation when exposed to UV light. The dea…
Effect of design of gas-turbine engine and cooling system on energy saving indices of contact gas-steam turbine plant in conditions of marine referencing and maintenance is defined
The magnetomechanical coupling tests were performed on Q235 steel tubular model specimens in NIM-2000HF magnetomechanical coupling equipment. The hysteresis loops were obtained in different magnetic fields and stresses. The magnetization curves were also achieved at different stresses. The influence of applied stresse…
高强度螺栓用钢42CrMo（B7）要求高强度的同时,还要求良好的抗低温脆性以及严格的晶粒度。通过Cr、Mo合金化、控制钢中碳含量和残余元素以及控制轧制控制钢中的第二相,实现了细晶强化和提高钢的低温性能。检验表明,钢的实际晶粒度为6～8级,各类夹杂物在0.5级以下,AkV达到27J（-100℃）,力学性能完全满足用户要求。
采用感应熔炼方法制备了La0.75Mg0.25Ni3.5-xFex（x=0,0.05,0.1,0.2,0.3）四元贮氢合金,系统地研究了合金B侧Fe对Ni部分替代对合金相结构及电化学性能的影响。X射线衍射（XRD）分析表明,La0.75Mg0.25Ni3.5-xFex由（La,Mg）2Ni7相（包括Gd2Co7型高温相和Ce2Ni7型低温相）组成。此外,随着Fe元素的加入,该类合金中出现CaCu5型LaNi5相,且随着Fe含量的增加而增多。电化学测试表明,随Fe含量的增加,合金电极活化次数变化不大,而其最大放电容量呈现先增后减的趋势,合金的最大放电容量由x=0.05时的376.21mAh·g^-1下降到x=0.3时的340.89m…
To date, one-dimensional ZnO micro/nanostructures have been attracting much attention for wide potential applications due to their unique electrical, piezoelectric, optoelectronic, and photochemical properties. The overall objective of this dissertation is to grow various ZnO micro and nanostructures using a novel mic…
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009.
LF-FSP provides access to novel single phase nanopowders, known phases at compositions outside their published phase diagrams, intimate mixing at nanometer length scales in multi metallic oxide nanopowders, and control of stoichiometry to ppm levels. The materials produced may exhibit unusual properties including stru…