Materials Literature
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In order to improve the detonation performance of hexahydro‐1,3,5‐trinitro‐1,3,5‐triazine (RDX) explosive, addictives with high heat values were used, and magnesium hydride (MgH2) is one of the candidates. However, it is important to see whether MgH2 is a safe addictive. In this paper, the thermal and kinetic properti…
A wet chemistry synthesis of Pt-Ce doped catalysts on carbon Vulcan support using an impregnation method with EDTA is presented. The composite catalyst was characterized by XRD, XPS and TEM. The catalytic activity of the prepared material was tested in a direct fuel cell using methanol, ethanol and hydrogen as fuels.…
Dimethyltin(IV)dichloride-catalyzed selective oxidation of 1,2-diols in water was achieved using dibromoisocyanuric acid (DBI) or Br2 as oxidants. The catalyst activates the 1,2-diol moiety through the formation of stannylene acetal in addition to enhancing selectivity. Various cyclic and acyclic 1,2-diol substrates h…
The synthesis of a new linear bis-tetraamine ligand L1, based on two 1,4,8,11-tetraazaundecane units grafted at the 2 and 6 positions of a pyridinyl linker substituted by an anthracenyl fluorophore in the para position, is described and anion complexation studies of L1 with anionic substrates are reported. The protona…
The purpose of this study is to determine the optimum condition for the tenderization of beef by bromelain using Response Surface Methodology (RSM). Initially, bromelain powder was produced from pineapple crown of variety N36. Production of the bromelain powder involves several process steps such as extraction, purifi…
Two isoreticular semi-flexible metal–organic frameworks with different pendant alkoxy groups have been synthesized to realize guest-responsive behavior, resulting in high H 2 selectivity and capacity.
The sol–gel method was applied to Al-doped bis (triethoxysilyl) methane (BTESM, Si–C–Si unit) membranes. High C3H6 : C3H8 permeance ratios of approximately 40 at 200 °C were achieved through the precise control of the silica network size via a spacer method using Si–C–Si units as well as the incorporation of Al in BTE…
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Abstract In multi-step hot forming processes, static recrystallization (SRX), which occurs in interpass times, influences the microstructure evolution, the flow stress and the final product properties. Static recrystallization is often simply modeled based on Johnson-Mehl-Avrami-Kolmogorov (JMAK) equations which are l…
Nitinol is an attractive material for various types of medical implants due to its superior mechanical and unique properties (shape memory effect, superelasticity, high damping capacity etc). The Nitinol surface was modified with biocompatible coatings of calcium phosphate prepared by the sol-gel dipcoating method. Th…
Cardiovascular diseases, including myocardial infarction and heart failure, are the main causes of death worldwide. Classical pharmacological treatment may halt, but cannot reverse the underlying disease process. Cellular cardiomyoplasty has the potential to reconstruct myocardium in situ; yet, it is hampered by poor…
We studied the electronic structure of a conventional superconductor, ZrB12, using high resolutionx-ray photoemission spectroscopy and single crystalline samples. Experimental results withdifferent bulk sensitivity reveal boron deficiency at the surface while the bulk is stoichiometric anddifferent valence states of Z…
Linear gyro-kinetic stability calculations predict unstable toroidal ion temperature gradient modes (ITGs) with normalised poloidal wave vectors well above one (kθρi>1) for standard tokamak parameters with adiabatic electron response. These modes have a maximum amplitude at a poloidal angle θ that is shifted away from…
Nanotech materials can be easier to target for specific cells such as those in cancerous tumors. They can be shaped into containers - miniscule pockets to contain drugs, especially those for cancer that are toxic to healthy tissues and need to be encapsulated until they reach the target. The present research study is…
There are approximately 337 highway tunnels and 211 rail transit tunnels in the United States; many of these tunnels are beneath bodies of water.1 Every day, more than 11.3 million passengers in 35 metropolitan areas and 22 states use some form of rail transit, either commuter, heavy, or light rail.2 It is well known…
Angular X-ray cross-correlation analysis (XCCA) is an approach to study the structure of disordered systems using the results of X-ray scattering experiments. In this paper we summarize recent theoretical developments related to the Fourier analysis of the cross-correlation functions. Results of our simulations demons…
In this paper, we present a numerical simulation of a single liquid drop impacting onto solid surface with smoothed particle hydrodynamics (SPH). SPH is a Lagrangian, meshfree particle method, and it is attractive in dealing with free surfaces, moving interfaces and deformable boundaries. The SPH model includes an imp…
This thesis concerns hydrogen fuelling stations from an overall system perspective. The study investigates thermodynamics and energy consumption of hydrogen fuelling stations for fuelling vehicles for personal transportation. For the study a library concerning the components in a hydrogen fuelling station has been dev…
The equations of thermal radiative transfer are mathematical models that describe the physical processes of photons scattering through and being absorbed in and emitted by a high-energy background material. These processes are important research objects of inertial confinement fusion (ICF). Numerical simulation is an…
The outcome of in vitro interaction of standard antibiotics with ethanolic leaf extracts of three medicinal plants (Picralima nitida, Chromolaena odorata and Aspilia africana) against antibiotic resistant bacteria was investigated by agar disc diffusion methods and macrobroth dilution techniques. At least three isolat…