Materials Literature
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We study the Lyapunov exponent for electron and phonon excitations, in pure and random Fibonacci quasicrystal chains, using an exact real-space renormalization-group method, which allows the calculation of the Lyapunov exponent as a function of the energy. It is shown that the Lyapunov exponent on a pure Fibonacci cha…
The molecular characterization of the maltohexaose-producing amylase gene of Klebsiella pneumoniae revealed an open reading frame in which 2,031 base pairs encode a protein of 677 amino acids with a calculated molecular weight of 75,921. The amylase gene had high similarities of 73.6% in DNA sequence and 79.3% in dedu…
Prediction of the cure-induced Tg increases and associated matrix and composite mechanical property deterioration of BMI systems in real service environments is attempted by network structure interrelations with mechanical and thermal properties as a function of composition (initial monomer ratio) and time-temperature…
Effects of a strong magnetic field on recrystallization and coarsening of grains after primary recrystallization were studied in non-oriented 3% silicon steels. The strongest applied magnetic field strength was 10 tesla. It was found that primary recrystallization process is retarded by applying a strong magnetic fiel…
During corrosion of Zr alloys in pressurized water at high temperatures a fraction of the corrosion-hydrogen is picked up by the metal. Long-term out-of-pile corrosion experiments have shown that chemical composition of Zr alloys and the size of second-phase particles (SPP) in Zircaloy-4 (Zry-4) affect the corrosion a…
Layered composites have been proposed as advanced materials for future use in large naval sonar domes. Unlike today’s steel/rubber composite domes, such materials promise engineered acoustic properties and less costly resin-transfer fabrication methods. The development and deployment of these large and complex composi…
Abstract A current sheet separates, beyond the closed part of the pulsar magnetosphere, two half-spaces with oppositely directed magnetic fields. It is shown that reconnection in this sheet may provide a source for high-energy emission.
Soil sample collected from industrial area of Kadi and Mehshana, India. Twelve bacterial isolates were found to be the most promising PHA accumulating bacteria among 15 isolates screened from soil. Screening for PHA was done by Sudan black staining. PHA extraction was carried out by chloroform digestion method. Bioche…
Abstract. Tranparent conducting coatings have been prepared by sol gel methods either by a conventional sol-gel process (Antimony doped Tin Oxide—ATO, Aluminium doped Zinc Oxide—AZO) or a new wet chemical process using fully dispersed crystalline nanoparticles (ATO, Indium Tin Oxide—ITO). The dip coating technique has…
Journal URL: http://www.societyofglasstechnology.org.uk/cgi-bin/open.cgi?page=journal&sessionid=85597106; http://www.ingentaconnect.com/content/sgt/pcg; http://www.societyofglasstechnology.org.uk/cgi-bin/open.cgi?page=%20PC/PC-00a&sessionid=85597106
"We describe an experimental method by which site-specific valence-electronic structure may be obtained. Itutilizes the spatial dependence of the electric-field intensity that results from the superposition of the incidentand reflected x-ray beams within the vicinity of a crystal x-ray Bragg reflection. Resolution of…
Studies on shock response of circular plates subjected to underwater explosion is of interest to ship designers. Non‐contact underwater explosion experiments were carried out on air backed circular High Strength Low Alloy (HSLA) steel plates of 4 mm thickness and 290 mm diameter. The experiments were carried out in tw…
(Pro-Pro-Gly)(10) is one of the most widely studied collagen polypeptide models. Microgravity crystal growth of (Pro-Pro-Gly)(10) was carried out in the Advanced Protein Crystallization Facility aboard the Space Shuttle Discovery during the STS-95 mission. Crystals were successfully grown in all experiments, using bot…
Ethylene-propylene-diene elastomer (EPDM), which is grafted with an isocyanate-containing monomer (HI), was blended with polyethyleneterephthalate (PET) and its morphological, thermal, rheological, and mechanical properties were studied. HI was incorporated onto EPDM backbone through a solution graft reaction. When th…
Assemblies of short CdS nanofibers/poly(styrene-alt-maleic anhydride) were prepared via a one-pot procedure in anhydrous ethanol for the first time by γ-irradiation under ambient conditions. The as-prepared copolymer matrix can successfully control the morphology of nanocrystalline CdS and prevent aggregation. Carbon…
This paper demonstrates that measurements on well-defined ‘dots’ of a material on a substrate provide a useful experimental approach for determining the area of a specimen that contributes to a small-area XPS measurement. The method provides information that can verify instrument operation conditions and the adequacy…
A LiAl2(OH)6+ intercalated montmorillonite was prepared from a montmorillonite by using a hydrothermal soft chemical process. As a first step, lithium aluminium hydroxide complex ions (LixAln(OH)mz+) were inserted into the interlayer space of the montmorillonite by an ion-exchange reaction. In the second step, the ion…
Dynamic differential scanning calorimetry (DSC) using paper samples of different compositions has evidenced varying degrees of endothermic activity prior to the exothermic, oxidative decomposition of cellulose under static air. Whereas cotton cellulose papers displayed a significant endothermic activity, wood-pulp pap…
The formation of scale on heat transfer surfaces in cooling water systems is a frequent engineering problem. The present paper deals with the scaling process of calcium carbonate on a copper modified heat transfer surface with low surface energy—electroless plating (ELP) surface. The induction period of calcium carbon…
The present paper discusses the theoretical modelling of liquid impact damage thresholds as a result of spatial and temporal distributions of transient stresses in elastically deformable brittle materials. The model predicts changes in the response characteristics of brittle materials owing to an idealised representat…