Materials Literature
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A macro-scale ProCAST and a meso-scale Cellular Automaton Finite Element model (CAFE) are used to simulate the competitive growth and grain selection during solidification in spiral grain selector, which is widely used in industry to produce single crystal turbine blades. The macro-model ProCAST calculates the macrosc…
Aluminum doped zinc oxide (AZO) thin film was deposited on microscopic glass substrate following a chemical technique called successive ion layer adsorption and reaction (SILAR). The technique involves multiple dipping of the substrate in an aqueous solution of sodium zincate kept at room temperature and deionized wat…
The antiferromagnetic resonance in single crystals of the YFe3(BO3)4-GdFe3(BO3)4 system is studied in the frequency range 25–140 GHz and the temperature range 4.2–50.0 K. It is established that the YFe3(BO3)4 crystal containing only the magnetic subsystem of Fe3+ ions is an antiferromagnet with an easy anisotropy plan…
A novel synthetic route has been developed to couple selectively a modified octa-peptide, that is able to gel at low temperature, to the prototypical thermoresponsive polymer poly(N-isopropylacrylamide) to give a bioconjugate that exhibits double thermoresponsiveness.
The present work was designed to examine the interaction of collagen/calcium phosphate during the initial mineralization process. Circular dichroism analysis was performed to investigate the conformation change of collagen during the initial process. An ultraviolet photometer was used for turbidity measurements in sit…
Luminescent triple-stranded helicates, formed between Tb(iii) ions and bis-acylpyrazolones, were directly assembled into a 1-D polymeric system.
Semi-quantitative analysis of two algal samples from the Mantaro River taken few kilometres downstream from La Oroya city at Junin, Peru, contained both organic-pollution tolerant and morphologically abnormal diatom associations. The organic pollution is inferred by elevated percentages of Nitzschia palea, Gomphonema…
Controlled deposition of calcium carbonate crystals can be obtained on degummed Bombyx mori silk fibers through the use of a silk fibroin solution; aragonite crystallites are found on the surface of the fiber with consistent orientation along the longitudinal axis; the results indicate that the combination of the orde…
In this study, poly(hydroxybutyrate) microparticles containing piroxicam were prepared by the oil-in-water emulsion-solvent evaporation method. The effects of some process conditions on drug content were determined using a 2³ factorial design. The piroxicam loading efficiency varied from 5.5 to 89.8 %. Hollow and irre…
This study reports the development of liposomal system for a potent antitumor drug, topotecan. To achieve this goal conventional and PEGylated liposomes were prepared according to a factorial design by hydration method followed by extrusion. Parameters such as type of lipid, percentage of cholesterol, percentage of ph…
AbstrAct Purpose: Nanospider technology is modified electrospinning method for production nanofiber textile from polymer solutions. This material can be used as wound dressing and filter materials for example. Carbon coatings deposited onto surface of polymer nanofiber textiles are predicted to improve filtration effe…
Processability, morphology, optical, and mechanical properties of acrylonitrilebutadiene-styrene (ABS) polymers were studied by simulation of its reprocessing and service life. A series of ABS samples were prepared by melt-mixing of SAN and g-ABS. All specimens were characterized by melt mass-flow rate (MFR) measureme…
Assembly of nanoscale materials and functional hierarchical structures is a big challenge now faced by nanotechnology. Learning from biology, using proteins and protein assembled structures as scaffolds to control the synthesis and organization of materials like living tissues provides the perfect solution to this pro…
The results of two published genome sequences from marine diatoms provide basic insights into how these remarkable organisms evolved to become one of the most successful groups of eukaryotic algae in the contemporary ocean.
Abstract Summary: A copolycondesation‐type poly (amic acid) (PAA) was synthesized using pyromellitic dianhydride (PMDA) and 3,3′,4,4′‐benzophenonetetracarboxylic dianhydride (BTDA) as dianhydride monomers, and 4,4′‐oxydianiline (ODA) as a diamine monomer under microwave irradiation in dimethylformamide (DMF). PAA was…
A series of melts with carbon content 1.38–4.16% and that of vanadium 5.25–15.50% was made. The X-ray diffraction of the examined alloys revealed the presence of three phases, i.e. ferrite, alloyed cementite, and VCx carbide. The relationships between the content of carbon and vanadium corresponding to eutectic struct…
Effects of anions and cations in the supporting electrolyte on the storage capacity of a hybrid capacitor were studied, and it was found that the large discharge capacity of 95 mAh/g was achieved by using triethylmethylammonium as a supporting electrolyte. Storage mechanisms of positive and negative electrodes were al…
The mechanism of anodic alkaline dissolution of aluminum was investigated through the analysis of cyclic voltammetry (CV) and potential step experiments. Attention was focused on the role of aluminum hydride as a reaction intermediate, as suggested by the recent detection of formation during open-circuit dissolution.…
In this work we prepared icosahedral gold particles using hydrogen tetrachloroaurate(III) hydrate (HAuCl4·3H2O) as precursor and poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymers as both reductant and directing agent. The products were characterized by scanning electron…
Electron paramagnetic resonance spectroscopy has unmasked for the first time the spin-delocalised doublet- and triplet-ground states of azacalix[4]arene cation radicals.