Materials Literature
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A method for the parameterisation of molybdenum disulphide is presented which reproduces the crystal structure accurately. The method involves calculating parameters such that there is no net force contribution from any individual term of the potential on any atom. Ideal bond lengths and bond angles are taken from the…
The lattice invariant shear in the β1→γ1′ martensitic transformation in a Cu–Al–Ni alloy is confirmed to be 〈111〉γ1′ Type II twinning by X-ray diffraction and two-surface analysis using single crystals. However, Type II twins have not been observed by electron microscopy in the past. To resolve this conflict, the twin…
A semi-empirical model describing the plane wave shielding effectiveness (SE) of metallized fabrics, both woven and non-woven, has been developed. The model incorporates the plane wave shielding theory of homogeneous metal foils, meshes, and thick perforated metal panels into a formulation for predicting the shielding…
3. A User's Guide to Principal Components. By J. E. Jackson. ISBN 0 471 62267 2. Wiley, New York, 1991. xviii + 570pp. £55.15.
In this paper, computer programs to evaluate kinetic analysis from non-isothermal thermogravimetric data are discussed. The flowcharts for all the programs are shown. These include those based on single-heating-rate and multi-heating-rate procedures. The single-heating-rate methods include the differential and integra…
A method has been developed for screening stator bars and coils using a particular type of partial discharge (PD) detector. The objective in making PD screening tests was to identify those bars or coils which are more likely to fail on voltage endurance in a relatively short time. The majority of the examples given pe…
The low-temperature single-crystal absorption spectrum, far-infrared spectrum and single-crystal structure determination of [Ni(tacn)2][ClO4]2·H2O (tacn = 1,4,7-triazacyclononane) are reported. The compound crystallizes in the monoclinic space group P21/a(Z= 2) with a= 9.614(3), b= 13.451(6), c= 9.648(4)Å and β= 120.1…
Laser-induced multiphoton and SF6-photosensitised decomposition of tetramethoxygermane has been used for chemical vapour deposition of reactive organooxogermanium polymers, which were characterised by IR, VIS, and UV spectra and ESCA and TEM techniques. The properties of the deposited layers differed depending on the…
In view of the limitations inherent to phenomenological approaches, the problem of the internal structure of defects in nematics is here afforded from a molecular viewpoint. By using an extension of the Maier-Saupe mean-field potential which accounts for distorted states of nematics, the general equation applicable in…
The nickel(II) complex of the pendent-arm macrocycle 1-(3-dimethylaminopropyl)-1,5,9-triazacyclododecane (L1) sequesters CO2 from air to yield, after addition of thiocyanate ion, [{(HL1)Ni(NCS)}2(CO3)]2+, the first example of a µ-carbonato dinickel(II) complex; the Ni atoms are antiferromagnetically coupled with the e…
Space charge distributions of PLZT 8/65/35 were measured by the laser intensity modulation method. The effect of space charge on the micro-macro domain transition is shown. Large differences in the depolarization temperature T/sub d/ measured on heating and cooling are due mainly to the effect of space charge.>
The combined influence of temperature and food concentration on Pteria sterna growth was determined, using 3 temperatures and 3 food concentrations. During 15 wk, the shell was measured weekly along the axis of maximum growth. The 2 higher growth rates (4.8 and 4.2 mm mo-') were obtained with the highest ration, at 30…
Abstract Low reaction rates and distinct transition phenomena from the solid to the melt state restrain solid state polymerisation (SSP) reactions of nylon salts for industrial application. To alleviate these problems, catalysts containing nylon salts are employed. In this study, hexamethylenediammonium adipate (HMA)…
A kinetic study has been made on the reduction of iron oxide in molten slag with graphite. The composition of the primary slag was changed so that SiO2 concentration varied between 0.33 and 0.50 mole fraction, and slag basicity between 1 and 2. The experimental temperature was 1300°C. The reaction rate is significantl…
Improving the quality of our environment has become a growing concern in this country and around the globe. Research efforts in this field have recently been accelerated by the passage of the 1990 Clean Air Act. This book reports on a symposium that is part of a continuing series on the surface science of catalysis. I…
The electric strength of air, in millimeter gaps, decreases at frequencies exceeding 100 kHz, but the effect on the discharge inception voltage V/sub i/ in solid insulation is too small to explain the reduction in the short-time breakdown voltage V/sub st/ of solids at radio frequencies. When breakdown is caused by in…
Measurements on polymers (Teflon, FEP and Mylar) have shown that the secondary electron emission from uncharged surfaces exceeds that from surfaces containing a positive surface charge. The reduced emission of charged surfaces is due to recombination between electrons undergoing emission and trapped holes within the c…
A liposome-associated doxorubicin formulation that has been utilized in two phase I clinical trials at two separate medical centers is described. This work deals with formulation optimization, process development, quality control assays on raw materials, characterization assays for these liposomes, and their short-ter…
The effects of cold deformation on the morphology of α precipitates were examined for three β titanium alloys which were each mainly deformed by slip, twinning, and stress-induced martensitic transformation.Although α precipitated preferentially at β grain boundaries in the undeformed specimens, slight deformation (5%…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTValence band photoemission studies of corrosion inhibitor action on iron surfaces: effect of etidronateIan D. Welsh and Peter M. A. SherwoodCite this: Chem. Mater. 1992, 4, 1, 133–140Publication Date (Print):January 1, 1992Publication History Published online1 May 2002Publis…