Materials Literature
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We present the evidence for the surface density of states (SDOS) of the hydroxylated and reduced rutile TiO2 (110) single crystal different from the bulk electronic property by tunneling spectroscopy using scanning tunneling microscopy technique (STM/TS). The surface band gap energy (SEg) was 1.6 eV as the tunneling-a…
In order to further examine the effect of the addition of an excess amount of H 2 SO 4 to CuSO 4 solution on the morphological variation of copper film during electrodeposition carried out at relatively higher cathodic overpotentials, x‐ray diffraction patterns of the copper film were analyzed. The ratio of the relati…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEvidence for an Ag4O3 phase of silver oxideA. N. MansourCite this: J. Phys. Chem. 1990, 94, 2, 1006–1010Publication Date (Print):January 1, 1990Publication History Published online1 May 2002Published inissue 1 January 1990https://pubs.acs.org/doi/10.1021/j100365a093https://d…
Abstract A large number of polypropylene samples, of isotacticities spanning the range 0.35 to 1.00 mm, have been examined by differential scanning calorimetry (DSC) in order to establish a calorimetric index for determining stereostructure. Crystallization studies show that the crystallization onset temperature decre…
Self-accommodation process and the resulting structure of the orthorhombic martensite in a Ti-Ni-Cu shape memory alloy were investigated.Observations of the self-accommodation process of habit plane variants of the orthorhombic Ti-Ni-Cu martensite were made by transmission electron microscopy, and the three-dimensiona…
Various Nd-Fe-B sintered magnets of different sizes were prepared by mechanical cutting and by the Bond method. Magnetic properties were measured as a function of the S/V value, which is the ratio of surface area to volume of the sample. For samples with S/V>
Rotational dynamic magnetostriction was measured as a function of rotating magnetic flux density on nonoriented and grain-oriented silicon steel sheets under various magnetization conditions. Rotational dynamic magnetostriction was measured by using a special strain gage which provides x- and y-direction output. Rotat…
Surface prickle of fabrics can be a factor limiting the use of the coarser types of wool in apparel or upholstery products. An investigation is reported in which, in order to find a method of measuring prickle, a selection of fabrics with a widely differing number and stiffness of protruding fibres was assessed for pr…
The both-faces-hindered and highly symmetric complexes 5,10,15,20-tetra(2′,6′-dipivaloyl-oxyphenyl)porphyrinato-iron(II) and -cobalt(II), which have no amide residues but ester ones in the fence groups, have been synthesized. The iron(II) complex formed stable and reversible dioxygen adducts in toluene at 25 °C. The h…
Amorphous magnetostrictive Co-Fe-Si-B wires exhibiting square and bistable hysteresis loops have been obtained by tension annealing treatments of the wires cold-drawn to lower than 0.05 mm in diameter from the as-quenched state (0.125 mm in diameter). Bistable switching characteristics were observed even in a 1-cm len…
Unicellular algae are autotrophic eukaryotes which contribute to overall primary production in any aquatic ecosystems.Furthermore, some of them are very usefull in the aquaculture of fish, shrimp and shellfish as primary live food.However, the pathogens for the unicellular algae are not well known.Although various alg…
The crystal structures of [PPh3Me]2[CuBr3], [PPh3Me]2[CuBr2]Br, and [PPh3Me]2[AgI3] have been determined by single-crystal X-ray diffraction methods at 295 K. The salt [PPh3Me]2[CuBr3] contains a planar, almost perfectly trigonal tribromocuprate (I) ion [CuBr3]2–. The exact symmetry of the ion in the crystal is C2v, w…
Recent experiments on colloidal suspensions of silica spheres in a water-lutidine mixture close to the consolute point have revealed interesting sphere-aggregation behavior that has been linked to wetting phenomena. We carry out a theoretical analysis of the phase behavior in such mixtures and suggest that the observe…
The butyrylation of chitosan of various degrees of acetylation yielded derivatives soluble in water and methanol. Solutions of the derivatives in these solvents when evaporated afforded tough clear flexible films. The effect of the degree of butyrylation on a range of deacetylated chitins was investigated and the resu…
Ethanolic extracts of forty Jordanian medicinal plants were examined for cytotoxicity, mutagenicity and antimicrobial activity. Among the 40 tested plants, 12 extracts were active in brine shrimp cytotoxicity bioassay with LC50 in the range of 74-748 μg/rnl. These positive extracts were further tested for their antitu…
The early stage of corrosion of copper by moist air containing 0.5% sulfur dioxide (75% relative humidity at 25°C) has been studied. Scanning electron microscopy, Auger electron spectroscopy, and transmission electron microscopy have been used to examine the surface topography, surface chemistry, and microstructure of…
The photoinduced phase transition behavior of liquid crystals (LCs) was investigated. The rate of the phase transition increased with increasing temperature and decreasing cell gap. The amount of isomerization of photoresponsive molecules to induce the phase transition was found to depend on the LC forming force and a…
The crystal structure of the low temperature modification of Na 3 PO 4 ( T < 601 K) has been determined and refined by means of Rietveld's full-profile technique using X-ray and neutron powder diffraction data. T-Na 3 PO 4 is tetragonal with space group P [unk]2 1 c . The cell dimensions are a = 1080.84(6) pm, and…
The electronic structure of some monomethyl derivatives of alloxazine has been investigated by the INDO/S-Cl-1 method in both the ground and in the two first-excited singlet states. A description of the intrinsic states of molecules by the extensive use of HOMO/LUMO coefficients is suggested. The proposed method both…
The room temperature mechanical properties of SiC fiber reinforced reaction-bonded silicon nitride matrix composite laminates (SiC/RBSN) have been measured. The laminates contained ∼30 vol% fraction of aligned 142-μm diameter SiC fiber in a porous RBSN matrix. Three types of laminates studied were unidirectional lamin…