Materials Literature
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Ruthenium tetroxide (RuO4) is a versatile agent for imparting mass density contrast to saturated hydrocarbon polymers. We have successfully employed RuO4 to examine the microdomain and crystallite morphologies of poly(ethylene-block-vinylcyclohexane) semicrystalline–glassy diblock copolymers via transmission electron…
Mullite whiskers and anisotropic grains that were derived from erbia‐doped aluminum hydroxide–silica gel were studied. Firing 3.0‐mol%‐erbia‐doped isostatically pressed pellets at 1600°C for 1.0–8.0 h resulted in a high surface concentration of mullite whiskers. Their c ‐axes were aligned preferentially along the pell…
The controlled release of citronellal and menthone from α-keto esters was tested in different household and bodycare applications by photochemical irradiation of these esters with artificial light sources or natural sunlight. Quantitative dynamic headspace analyses carried out with different application bases, such as…
The structural properties of Ru(0001) surfaces after various electrochemical treatments were investigated by ex-situ electron diffraction [low-energy electron diffraction (LEED)/reflection high-energy electron diffraction (RHEED)] and Auger spectroscopy experiments in conjunction with cyclic voltammetry. At potentials…
The Mac Donald-type 2 + 2 condensation of the readily available 5-mesityldipyrromethane with acenaphthenequinone leads to the trans (syn and anti) porphodimethenes, respectively, which, after treatment with KOH or NaOMe in THF and subsequent oxidation with air, yield the corresponding trans-8-carboxynaphthylporphyrins…
The liquid crystalline properties of a series of ionic silver complexes [Ag(NH2n-CnH2n+1)2]X (X = NO3, n = 6, 8, 10, 12, 14; X = BF4, n = 8, 10, 12, 14), derived from silver nitrate or tetrafluoroborate and aliphatic amines, have been investigated by optical microscopy, DSC, and X-ray diffraction. The materials exhibi…
A new method of probing surface–surface interactions and calculating attachment energies for morphology predictions, based on the interactions between an infinite surface and a thin finite slice (a nano-crystallite), has been implemented in the ORIENT program package. This, together with existing capabilities for stud…
Significantly prolonged survival rate was obtained for the first time using carcinoma mice models after the administration of single-component liposomes of dimyristoylphosphatidylcholine (DMPC) without any drug. An increase in lymphocytes under optical microscope was observed without any increase in the neutrophils co…
The crystal size of nanocrystalline CdS and CdSe films, electrodeposited from dimethyl sulfoxide solutions containing a Cd salt and elemental S or Se, is shown to depend on the nature of the anion of the Cd salt. Relatively strongly adsorbing anions, such as chloride, result in a smaller nanocrystal size than relative…
A new thermally stable oxo-bridged dinuclear nickel(III) complex has been synthesised and its crystal structure showed two nickel(III) ions with distorted square pyramidal coordination geometry.
This paper describes electrically conductive polymer blends consisting of polyaniline (PANI) dispersed in a polymer matrix. Melt blending of previously mixed, coagulated and dried aqueous dispersions of PANI and the polymer matrix lead to high conductivities at extremely low PANI concentrations (∼0.5 wt% PANI). In the…
Encapsulation of doxorubicin (Adriamycin) in liposome (LipADM) augments the anti-tumor effects of the drug and reduces side effects such as cardiotoxicity. However, it does not always enhance anti-tumor effects because of entrapment by the reticuloendothelial system. In this study, we investigated the anti-tumor effec…
We use the well-established functionals LDA, BLYP, BP86, BP91 and B3LYP as well as the more recent HCTH, PBE and PBE0 functionals to investigate the density functional theory (DFT) metal nuclear magnetic shieldings in ten transition-metal complexes ([Co(CN)6]3−, [Co(NH3)6]3+, Cr(CO)6, [CrO4]2−, Fe(CO)5 , Fe(C5H5)2, [M…
A mathematical model for the galvanostatic discharge and recovery of porous, electrolytic manganese dioxide cathodes, similar to those found within primary alkaline batteries is presented. The phenomena associated with discharge are modeled over three distinct size scales, a cathodic (or macroscopic) scale, a porous m…
The incorporation of Ga into the framework of zeolite Beta has been evidenced by X-ray absorption spectroscopy. Analysis of extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) data reveals the atomic environment of Ga in zeolite Beta. Both techniques provide evidence that…
The experimentally-optimized optical resolution of DL-phenylglycine (PG) with (1S)-(+)-camphor-10-sulfonic acid ((+)-CS) afforded the crystalline D-PG·(+)-CS salt in 45.7% isolated yield and 98.8% optical purity. This excellent resolution has been studied by comparison of the crystal properties of the diastereomeric s…
An investigation was conducted to determine the feasibility of analysing cement by introducing it as a slurry into an inductively coupled plasma optical emission spectrometer (ICP-OES). A complete analysis of cement for major (Ca, Si, Mg, Al, Fe) and minor and trace elements (S, K, Ti, Na, P, Mn and Sr) was accomplish…
The chemistry of cyclosilazanes and borazines is a topic of current interest in view of preceramic polymers which yield on pyrolysis various useful ceramic materials, e.g. silicon and boron carbide, silicon and boron nitride, and ternary or quaternary mixtures of these materials. These materials are hard and have high…
Bi 2 (Zn 1/3 Nb 2/3 ) 2 O 7 (BZN) thin films were prepared by using a pulsed laser deposition technique. For films in situ deposited on indium–tin oxide (ITO) coated glass substrates, the crystalline phase can be obtained by growing at a substrate temperature (Ts) higher than 475 °C. Too low a substrate temperature (T…
The sweeping of small dipolar loops by gliding dislocations is thought to be one of the mechanisms leading to dislocation pattern formation during cyclic deformation. The individual sweeping event was calculated within the framework of isotropic linear elasticity for an infinite straight gliding segment and a rigid di…