Materials Literature
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This paper examines the role of iron in mullite nucleation and growth from kaolins. We chose two typical raw kaolins containing a reduced impurity level and characterized by very different degrees of crystallinity of the kaolinite phase. Both the structural iron in kaolinite and also some iron deposited onto phyllosil…
Single-walled carbon nanotubes are treated as cylindrical structures of which their extensional, torsional, and bending rigidities are investigated. Using the potential energy for interatomic forces of the molecular mechanics model, pin-jointed truss models for single-walled carbon nanotubes were created. These truss…
A solgel process was developed, through which silica films possessing both high antireflection and super water repellence were obtained. In this process, methyl-modified SiO2 sols synthesized by colloidal suspension of SiO2 particles and hexamethyldisilazane (HMDS) were used to deposit spinning-coating films on optica…
In order to obtain a gelatin hydrogel crosslinked by a reagent-free method, gamma-ray and electron beam radiation was applied to porcine, bovine and fish gelatin gels and the products were characterized by measuring the gel fraction, the swelling ratio and the enzymatic degradability. On increasing the radiation dose,…
Sintering tests, involving airflow measurements before and after bed ignition, were carried out on three optimized iron ore blends-containing only hematite (HAEM), hematite with pisolite (PISO), and hematite with pisolite and hematite-goethite (PIMM)-to assess the resistance of the flame front and associated regions.…
Abstract This study was aimed at understanding how the process conditions affect the weld‐line strength and microstructure of injection molded microcellular parts. A design of experiments (DOE) was performed and polycarbonate tensile test specimens were produced for tensile tests and microscopic analysis. Injection mo…
Magnetic properties of double perovskites A2LnRuO6 (A = Sr, Ba; Ln = Tm, Yb) have been reported. Powder neutron diffraction measurements have been performed at 10 K and higher temperatures (≥100 K) to determine their crystal and magnetic structures. As a result of the Rietveld analysis of the diffraction profiles, it…
Novel gemini organogelators based on L-lysine, in which two L-lysine derivatives are linked by different alkylene chain lengths through the amide bond, have been simply and effectively synthesized, and their organogelation abilities and thermal stabilities have been investigated. In a series of L-lysine ethyl ester de…
A solid-state NMR study of an α-keratin sourced from equine hoof has revealed a strong dependence of molecular conformation and molecular dynamics on the degree of hydration of the material. 13C cross-polarization, magic-angle spinning experiments were used in conjunction with two-dimensional 13C-1H WISE and 2H NMR to…
A new permeameter for both metallic and insulative thin-films is proposed for up to 9 GHz range. The film sample is driven by a traveling electromagnetic field and the output signal is sensed by a planar shielded-loop coil. The electric field induced voltage at the pickup coil can well be suppressed by the nature of t…
A de novo designed gadolinium metallopeptide was found to be a very efficient relaxation agent, with 100% increase in relaxivity upon binding to DNA.
Microbiology-related corrosion has been noted in industry for many years. It is widely recognized that microorganisms affect the corrosion of metal and alloys immersed in aqueous environments. Under similar conditions, the effect of bacteria in the oral environment on the corrosion of dental metallic materials remains…
A physically based model is used to describe the resistivity increase of sub-100 nm copper interconnect structures. The main factors determining the increase are additional scattering of electrons at the surface as well as at the grain boundaries of the conductor. The model has been applied to several sets of experime…
Several panels of date palm leave (DPL) reinforced composites were fabricated using either autoclaving technique with vacuum bagging or press moulds with controlled temperature. Several fibre orientation and dimensions were tested. Two types of resins were selected. The first was a high temperature curing Phenolic (ph…
The release of chromate ions from chromate conversion coatings (CCCs) on Al alloys was studied, and the effect of aging of CCCs on the chromate release kinetics was investigated. Chromate release from CCCs into aqueous solutions was monitored by measuring the change in the chromate concentration in solution using UV-v…
Scale-resolved electrochemical surface structuring of titanium leads to well-defined topographies at the micrometer and nanometer scales, which are of interest for biomedical applications. Electrochemical procedures are described that lead to improved reproducibility and more precise shape control in through-mask elec…
A three dimensional micromechanical modeling approach was previously developed for predicting elastic constants of 2D woven fabric composites [Sheng, S.Z. and Hoa, S.V. (2001). Three dimensional micromechanical modeling of woven fabric composites. Journal of Composite Materials, 35(19): 1701-1729.]. In this paper, the…
Ferric hydroxide supported Au prepared with co-precipitation without heat treatment could be a very effective catalyst for selective CO oxidation in the presence of H2 at lower temperatures.
ABSTRACT Whey protein concentrates with ˜80% protein (WPC‐80) plasticized with 0.64 M glycerol or sucrose, or with 0.34 or 0.64 M sorbitol or polyethylene glycol (PEG) 200, produced flexible films. WPC‐80 with hydrolyzed lactose required addition of less sucrose to produce flexible films. WPC‐80 films formed as coatin…
The dissolution of nickel oxide cathodes in the electrolyte is one of the major technical obstacles to the commercialization of molten carbonate fuel cells (MCFC). A novel alternative cathode material for MCFC was synthesized, which was made of nano-size Co3O4 coated on the surface of Ni powder using a polymeric precu…