Materials Literature
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Abstract PMMA encapsulated silica particles were synthesized by the dispersion polymerization of MMA in supercritical carbon dioxide (scCO 2 ). Nanosized silica particles pretreated with 3‐(trimethoxysilyl) propyl methacrylate (γ‐MPS) were used as seeds in the polymerization. Polymeric stabilizer, poly(dimethylsiloxan…
Tumor specific delivery of anti-cancer drugs is one of the major challenges faced by drug development processes. In this study, we prepared a doxorubicin (DOX)-conjugated liposome (DCL) by incorporating the newly synthesized DSPE-PEG2000-DOX (DPD) into liposomes as a lipid component and tested its anti-tumor activity…
Convective instabilities of an autocatalytic propagating chemical front in a porous medium are studied. The front creates temperature and concentration gradients which then generate a density gradient. If the front propagates in the direction of the gravity field, adverse density stratification can lead to Rayleigh–Ta…
Nuclear power currently contributes nearly a quarter of the electricity needs of the UK. Much of this is from nuclear reactor plants developed some fifty years ago. Consequently, in the next few decades, many of these reactors and components are coming to the end of their 'useful' life and strategies for the effective…
Abstract PLGA nanofibers were prepared by an electrospinning method (mean diameter, 340 nm) and treated with plasma in the presence of either oxygen or ammonia gas to modify the surface of the nanofibers. The surface hydrophilicity of electrospun PLGA nanofibers was greatly increased by plasma treatment, which was con…
Abstract An optimization of SiO x N y anti‐reflective coatings with graded index layers for silicon solar cells based on the Bruggeman's effective medium approximation is presented. For simulation of reflectance and absorption of graded layer, the experimental optical data of silicon nitride SiN x :H and oxynitride Si…
Abstract Poly(ε‐caprolactone) (PCL) was melt blended with thermoplastic polyurethane based on polycaprolactone diol (TPU( PCL diol )). The amount of PCL was varied from 20% to 50% by weight. A single composition dependent glass transition temperature (from DSC) shows the miscibility of system. Also the negative value…
The complex dication of the diruthenium(II) compound {(mu-tppz)[Ru(bik)Cl]2}(ClO4)2 can be oxidized and reduced in two one-electron steps each. In CH3CN/0.1 M Bu4NPF6, the odd-electron intermediates{(mu-tppz)[Ru(bik)Cl]2}n+, n=1 and 3, have comproportionation constants of 7x10(8) and 1x10(5), respectively. Both exhibi…
Abstract As a new clinical examination apparatus for cardiac diseases, attention is focused on the magnetocardiograph, which can represent electrophysiological phenomena of the heart noninvasively as graphical information. We have been developing a compact and portable high‐temperature superconducting magnetocardiogra…
X-ray absorption near-edge structure (XANES) and valence-band photoemission spectroscopy (VB-PES) were used to elucidate the electronic and mechanical properties of diamond-like carbon (DLC) thin films deposited by the plasma-enhanced chemical vapour deposition method at various bias voltages (V(b)) using a C(2)H(2) v…
The reactions of trimethylindium (TMIn) with HN3 and NH3 are relevant to the chemical vapor deposition of indium nitride thin film. The mechanisms and energetics of these reactions in the gas phase have been investigated by density functional theory and ab initio calculations using the CCSD(T)/Lanl2dz//B3LYP/Lanl2dz a…
Abstract Octakis[2‐carbazol‐9‐yl]ethyldimethylsiloxy]silsesquioxane ( POSS‐Cz ) was newly synthesized and its photoluminescence properties in both solution and solid states were investigated. POSS‐Cz showed monomeric emission peak not only in solution state but also in solid state. This result suggests that the introd…
The theory describing the magnetic interaction of superparamagnetic compounds with water protons has been described by different theoretical models derived from the classical outer-sphere paramagnetic relaxation model. Consequently, a full set of analytical methods should be used to characterize the efficacy, purity o…
Abstract Multi‐walled carbon nanotubes (MWCNTs) were successfully functionalized with water‐soluble poly(2‐ethyl‐2‐oxazoline) (PEOX) through a polymer wrapping process. Pristine MWCNTs were first treated with nitric acid (HNO 3 ) at 120 °C for 24 hours. The resulting carboxylated MWCNTs were then mixed with 10 wt.% PE…
Abstract The adhesion strength of polyimide films were enhanced by treatment with alkali and/or alkaline potassium permanganate. No effect observered on the thermal decomposition as measured by TGA. The chemically modified PI film surface was then treated with a catalyst, coated with nickel by electroless plating, and…
Abstract Polymer blend/clay nanocomposites were prepared by ultrasonic‐assisted continuous extrusion process. This process was employed to enhance the compatibility between two polymers, and nano‐scale dispersion between the polymer blend and organically modified clay. Materials were linear polypropylene and polystyre…
Abstract The rheological properties of pure starch and blends of gelatinized starch/poly(lactic acid) (PLA) were studied using a rheometer incorporating a twin‐roll mixer and a single‐screw extruder. The mixer provides a useful and convenient tool to study the rheological properties and gelatinization processes of sta…
Abstract Waterborne polyurethane (WBPU)/clay nanocomposites were synthesized using prepolymer process with different clay content (0–5 wt%) of organoclay cloisite 15A. The optimum dispersion temperature of clay in polyol was found to be 80 °C at 3 hours. The XRD confirmed the exfoliation dispersion of clay by polyol i…
Several Hypoxis species and infraspecific taxa in southern Africa were found to be conspecific with the taxa described earlier. In this paper, thirteen validly published names are reduced to synonyms. Nine currently recognized taxa out of about 30 species in the Flora of southern Africa region are listed together with…
Abstract Wavelength dispersion of birefringence in a miscible polymer blend of a polynorbornene and poly(styrene‐ co ‐maleic anhydride) was investigated. By adjusting the blend composition, the drawing ratio and the drawing temperature, the wavelength dispersion was controlled and the wide band quarter‐wave film was o…