Materials Literature
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Flatband potentials of boron‐doped polycrystalline and single crystal chemical vapor deposition and high‐temperature, high‐pressure diamond electrodes were estimated by three photoelectrochemical methods (i) as the photocurrent onset potential, (ii) from the dependence of photopotential on the light intensity, and (ii…
Curve fitting analysis of Al K-edge XANES is employed as a novel characterization method for the quantitative estimation of tetrahedral and octahedral Al in various aluminas.
The lower-rim substituted calix[4]arene, 5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrakis(dimethylphosphinoylmethoxy)calix[4]arene (L) has been synthesized and characterised by the single-crystal structure of its acetonitrile adduct, L·2MeCN (monoclinic, space group P21/c). The ligand adopts a cone conformation and a…
Dielectric dispersion in disordered Pb(In 0.5 Nb 0.5 )O 3 crystals was studied. Two dispersion regions were found at 10 3 -10 5 Hz and 10 8 -10 9 Hz at room temperature. The low-frequency relaxation process, which has a very wide distribution of relaxation times, shifts to higher frequency (up to about 10 9 Hz) and be…
Cyanide in alkaline aqueous solution is reported to be destroyed by a facile sonochemical process. In the presence of power ultrasound emitted from a horn probe with a frequency of 20 kHz and up to 60 W cm-2 intensity a decay in the concentration with first order kinetics is monitored by ion selective electrode techni…
A number of carbosilane dendrimers derivatised on their external surface by silanol groups have been synthesized and characterised. The new molecules are prepared by repetitive hydrosilation/alkenylation reactions, and then careful hydrolysis of Si–Cl groups in one of two ways produces dendrimers with external Si–OH g…
After 3 years, an advanced transmission electron microscope (ARHVTEM) was finely tuned. Environmental mechanical vibration causing serious disturbance for atomic-resolution observation was effectively damped by an air spring suspension system. Stray magnetic fields from the subway running 250 m away were found to degr…
A physiologically based pharmacokinetic model was developed to evaluate the kinetics of one of the newest sonographic contrast agents available, FS069 or Optison. This material consists of octafluoropropane gas encapsulated in proteinaceous microspheres, injected intravenously for use as a myocardial contrast agent in…
A series of novel cationic merocyanine dyes were prepared by condensation of 1,2,3,3-tetramethylindolium derivatives and 3-formyl-4H-1-benzothiopyran or -benzopyran derivatives, and their photochromic properties were investigated, especially focusing on the substituent effect in the indolium moiety. These dyes were co…
A standardless semi-quantitative method for wavelength dispersive spectrometry (WDS) electron probe microbeam analysis was developed with a view to simplifying the analytical procedure required with this apparatus. Based on spectrum acquisition, this method is a way to obtain the sample composition in a short time wit…
A new material was studied for high-efficiency motor cores that need higher magnetic flux density, lower iron loss, and lower mechanical hardness. Excessively high Si content tends to decrease magnetic flux density of nonoriented electrical steel sheets. The composite addition of rare-earth metals (REM) and Al into mo…
For molecular-scale electronic devicesnon-conjugated materials whose π-orbitals are close enough to allow energy transfer by the so-called Dexter mechanism are of interest. In this paper the synthesis of a soluble polymer (see Figure) is described in which aromatic conjugation and through-space π-orbital overlap (homo…
An investigation of the dependence of the thermal stability of DLC (a-C:H) and silicon-modified DLC (a-C:H:Si) films on film-deposition conditions has been conducted. An interpretation based on plasma chemistry, x-ray photoelectron spectroscopy, confocal Raman spectroscopy and substrate-bias-voltage changes is propose…
pH microsensors were incorporated into a microcapillary cell to monitor pH changes simultaneously with electrochemical measurements. The microsensors ( diameter d = 10 μ m ) were positioned at the center of the microcapillary cell tip opening ( d = 100 μ m ) and 50 mm above the surface of the sample. During the dissol…
A new, convenient method for the preparation of functionalised precursors to stable tetraalkylisoindoline nitroxides (aminoxyls) is presented. Simple treatment of 2-benzyl-1,1,3,3-tetramethylisoindoline 2 with Br2 in CCl4 gives rapid oxidative debenzylation, generating benzaldehyde and an unusual bromoamine, 2-bromo-1…
A straight dislocation line in a decagonal quasicrystal is considered. For a decagonal quasicrystal of point groups 10, and 10/ m with a straight dislocation parallel to the periodic direction, the basic governing equations are solved by decoupling this problem into a plane elasticity problem and an antiplane elastici…
Complexes of 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrayltetramethylenetetrakis(phenylphosphinic acid) H4L1 with yttrium and a number of lanthanides were synthesized and the crystal structures of Li[LaL1(H2O)]·10H2O and Li[CeL1(H2O)]·10H2O determined. The complexes are isostructural with RSRS configurations at the…
The two termini of the torsionally strained dithiadiazolyl diradical S2N2C–C6H3Me–MeC6H3–CN2S2 3 possess different solid state structural environments; the bulk magnetic susceptibility of 3 is interpreted in terms of the distinct properties of the two radical centres.
Parallel (in-plane) electrical resistivities of single-layered Cu and Cr films, and Cu/Cr multilayered thin films sputter deposited on Si substrates were evaluated as a function of layer thicknesses ranging from 2.5 to 150 nm in the temperature range of 4–325 K. The resistivity of the multilayers at a given temperatur…
After providing basic information on enzymes involved in cholesterol homeostasis, and on management of hypertriglyceremia and hypercholesterolemia, with the aid of cholestyramine and fibric acid, this chapter examines the effects of the ingestion of chitosan. Dietary chitosan is effective on serum cholesterol and in a…