Materials Literature
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The development of thin macromolecular layers with incorporated disulfide bonds that can be disrupted and formed again under redox stimulation is of general interest for drug release applications, because such layers can provide rapid and reversible responses to specific biological systems and signals. However, the pr…
Flory-Huggins theory is the main basis of polymer solution and blend thermodynamics. A key piece of this theory is a parameter quantifying the enthalpic interactions between the components; however, experiments have revealed that this parameter is not composition independent, as originally assumed. This composition de…
The capability of natural circulation for core cooling has been evaluated in detail for a station blackout (SBO) event induced by an earthquake and a subsequent tsunami hit. The evaluation was prompted by the accident at the Fukushima Daiichi nuclear power station of Tokyo Electric Power Company. The plant dynamics co…
Cobalt oxide (Co3O4) nanoparticleshave been synthesized by hydrothermal method using mixture of cobalt(II)chloride, Triton X-100 and KOH in an autoclave at 180 °C for 6 h followed by heating at 400 ºC for 3 h in air. The product have been characterized by Fourier transform infrared (FT-IR), UV-Vis spectroscopy, powder…
Abstract The new mineral species barlowite, ideally Cu 4 FBr(OH) 6 , has been found at the Great Australia mine, Cloncurry, Queensland, Australia. It is the Br and F analogue of claringbullite. Barlowite forms thin blue, platy, hexagonal crystals up to 0.5 mm wide in a cuprite-quartz-goethite matrix associated with ge…
Produksi bioplastik dari sorgum dan selulosa hasil ekstraksi rumput laut eucheuma spinosum dengan gliserol sebagai pemplastis secara termoplastik telah diteliti. Variabel yang diteliti adalah perbandingan massa pati sorgum dengan selulosa sebesar 10:0; 9,5:0,5; 8,5:1,5; 7,5:2,5; 6,5:3,5; 5,5:4,5 (w/w). Partikel pati s…
C. Yu and co-workers demonstrate silica vesicles with fine control over the entrance size in the siliceous walls (<3.9–34 nm). On page 5068, the entrance size is shown to be crucial for the loading and releasing of biomolecules. Silica vesicles with an optimal entrance size exhibit high loading capacity, sustained rel…
Highly branched SnO <sub>2</sub> -decorated TiO <sub>2</sub> interpenetrating network architectures were fabricated with superior denitration catalytic activity over a broad temperature range.
Mechanical alloying under various gas atmospheres such as Ar, an Ar-H2 mixture, and He gases were carried out, and its effects on the powder properties, microstructure and mechanical properties of ODS ferritic steels were investigated. Hot isostatic pressing and hot rolling processes were employed to consolidate the O…
Solid heteropolyacids (HPAs) are promising nonpolluting superacids used as catalysts and solid proton conductors. The catalytic and conducting properties of HPAs are very sensitive to the amount of hydration water present in the system, as water molecules tend to interact with the HPA acid protons to form [H 3 O] + an…
A new detection technique, pump-spin orientation-probe ultrafast spectroscopy, is developed to study the hole trapping dynamics in colloidal CdS nanocrystals. The hole surface trapping process spatially separates the electron-hole pairs excited by the pump pulse, leaves the core negatively charged, and thus enhances t…
Poly(styrene-co-ethyl acrylate) [P(St-co-EA)] with different ratios of St/EA was mixed with the small molecule 4,4′-thio-bis(6-tert-butyl-m-methyl phenol) (AO300) to investigate the influence of hydrogen bonding strength on the glass transition behavior. The glass transition temperature (Tg) linearly increased after a…
Highly transparent, flexible and conductive networks of carbon nanotubes-silver nanowire networks were formed on polyethylene terephthalate (PET) substrates. The high temperature and humidity tests reveal that our CNT–AgNW composite networks maintain high durability and reliability in the electrical and optical proper…
The effect of hot isostatic pressing (HIP) treatment on microstructure of gas-turbine vanes made of K452 alloy was investigated by OM, SEM and TEM. The results showed that HIP treatment played a great role in the porosity healing processing, where 80% of porosities were eliminated and the diameter of remnant porositie…
Biodegradable polymers and plastics are environment friendly because they decrease environmental pollution, conserve resources and reduce non-recyclable waste. Poly lactic acid (PLA) is a biodegradable plant derived polymer. Their properties are improved by copolymerization, blending, plasticization, polymer alloy tec…
The aim of this study was to investigate the physicochemical characteristics of various viscosity grades of hydroxypropyl methylcellulose (HPMC) for mucoadhesive buccal films. The HPMC used in this study was K4M, K15M and K100M which their viscosity were 4000, 15000 and 100000 mPas respectively. Using HPMC as film for…
Inherent nanomaterial characteristics, composition, surface chemistry, and primary particle size, are known to impact particle stability, uptake, and toxicity. Nanocomposites challenge our ability to predict nanoparticle reactivity in biological systems if they are composed of materials with contrasting relative toxic…
Among the most fascinating nanostructure morphologies are spirals, hybrids of somewhat obscure topology and dimensionality with technologically attractive properties. Here, we investigate mechanical and electromechanical properties of graphene spirals upon elongation by using density-functional tight-binding, continuu…
The present work aims at obtaining a suitable and selective catalyst for catalytic dehydrogenation reactions through designing pore structures of silica-containing alumina nanocomposites by optimizing silica content in the structure. In this trend, series of silica-containing alumina nanocomposites with different mola…
Low-molecular-weight heparin (LMWH)-stearylamine (SA) conjugates (LHSA)-based self-assembled nanoparticles were prepared for intravenous delivery of docetaxel (DCT). 1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide and N-hydroxysuccinimide were used as coupling agents for synthesis of LHSA conjugates. The physicochemica…