The Effect of Particle Size on the Electrical Conductivity of CuCl ( Al2 O 3 ) Composites
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Artificial intelligence in organic synthesis. SST: starting material selection strategies. An application of superstructure search
A program for the interactive selection of potential starting materials given a desired target molecule is described. The program uses hierarchical search to rapidly select candidates from a large starting material library and contains a function to evaluate the appropriateness of the functionality of the starting mat…
Higher valent manganese chemistry. Synthetic, structural, and solution studies on [Mn(catecholate)3]n- (n = 2, 3) complexes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigher valent manganese chemistry. Synthetic, structural, and solution studies on [Mn(catecholate)3]n- (n = 2, 3) complexesJudithAnn R. Hartman, Bruce M. Foxman, and Stephen R. CooperCite this: Inorg. Chem. 1984, 23, 10, 1381–1387Publication Date (Print):May 1, 1984Publicati…
Calibration of ac susceptometer for cylindrical specimens
The absolute magnetic susceptibility of cylindrical specimens is obtained with an ac susceptometer whose calibration is based on a calculation of mutual inductance. An axially magnetized cylinder is modeled as a solenoid of the same size. The mutual inductance between such a solenoid and a pickup coil of arbitrary dim…
Reflection electron-energy-loss investigation of the electronic and structural properties of palladium
The versatility of electron-energy-loss spectroscopy for investigating the electronic as well as the structural properties of a bulk sample is shown. The technique should be considered a powerful tool for ranging from low to high energies in the same experimental apparatus. The electronic properties of palladium are i…
Compatibility of poly(ϵ‐caprolactone) (PCL) and poly(styrene‐co‐acrylonitrile) (SAN) blends. II. The influence of the AN content in SAN copolymer upon blend compatibility
Abstract The compatibility of polymer blends of poly(ϵ‐caprolactone) (PCL) and poly(styrene‐co‐acrylonitrile) (SAN) containing various acrylonitrile (AN) contents was studied to evaluate the influences of copolymer composition and PCL concentration upon blend compatibility. Blend compatibility was characterized by the…
Crystal structure of diamondlike carbon films prepared by ionized deposition from methane gas
Diamondlike carbon films have been prepared by ionized deposition from methane gas. The film structures were examined by transmission electron microscopy, electron diffraction, and electron spectroscopy for chemical analysis techniques. It was found that the structure of the carbon films could be classified into three…
Polypeptide composition of rat sperm outer dense fibers. A simple procedure to isolate the fibrillar complex.
Treatment of caput or cauda epididymal rat sperm with a low concentration (0.05%) of the cationic detergent cetyltrimethylammonium bromide and 30 mM 2-mercaptoethanol solubilized most of the sperm structures except for the sperm head and the outer dense fiber-connecting piece complex. The latter were purified, and abo…
Sinusoidal Pulsewidth Modulation Strategy for the Delta Inverter
A method by which sinusoidal pulsewidth modulation can be implemented on the delta inverter is described. Analysis of the resulting waveforms, in terms of the exponential form of the Fourier series, is provided, along with a comparison of harmonic content with a conventional sinusoidally modulated waveform. Experiment…
Free radical decay kinetics in PMMA bone cement
Electron-spin resonance has been used to measure the decay of the concentration of polymerization radicals in polymethyl methacrylate (PMMA) bone cement and the kinetics of the decay determined. Thermal annealing at various temperatures has shown that the logarithm of the concentration of radicals varies linearly with…
Elastic and pseudoviscous properties of coal under quasi-static and impact loadings
An investigation of the elastic and viscoelastic properties of Nova Scotia coal was carried out over a wide range of strain rates (quasi-static to impact). High resolution stress–strain diagrams for the coal were obtained from compression tests for the lower and medium strain rates up to [Formula: see text] and with t…
Polarization properties of the variable-grating-mode liquid-crystal device
The principal features of the liquid-crystal molecular orientation within the variable-grating-mode liquid-crystal device have been determined as a function of the applied voltage across the cell by measurement of the polarization properties of light diffracted by the liquid-crystal birefringent phase grating.
Prüfmethoden zur Ermittlung des Verhaltens von Polyolefinen bei der Einwirkung von Chemikalien
Abstract Zwei Prüfmethoden zur Ermittlung des Verhaltens von thermoplastischen Kunststoffen bei der Einwirkung von Chemikalien werden gegenübergestellt. Dies sind der Immersionsversuch und der Zeit‐stand‐Innendruckversuch an Rohrproben mit Mediumfüllung. Beim Immersionsversuch wird die Veränderung der mechanischen Eig…
Microstructural rearrangement during heat treatment of drawn nylon 66 fiber
Abstract Melt‐spun nylon 66 fibers were drawn and subsequently heat treated isothermally and quenched. The heat‐treated fibers were then examined by wide‐and small‐angle x‐ray scattering (WAXS and SAXS), by differential scanning calorimetry (DSC), and by static mechanical testing. These measurements allow one to follo…
Zinc Oxide Crosslinking Chemistry of Halobutyl Elastomers—A Model Compound Approach
Abstract The study of the crosslinking reactions of halobutyl rubbers with zinc oxide, conducted on low molecular weight model compounds, has brought about a thorough understanding of the chemistry of this process. It has been shown that there are two competitive processes taking place, with the major one generating t…
15—THE INITIAL SHEAR MODULUS OF PLAIN-WOVEN FABRICS
A theoretical expression for the initial shear modulus of a plain-woven fabric is derived and is then compared with the moduli of a range of woven fabrics.
X-Ray Study of the Phase Transitions in {N(CH3)4}2ZnBr4 and {N(CH3)4}2CoBr4
The space group of each low temperature phase in {N(CH 3 ) 4 } 2 ZnBr B and {N(CH 3 ) 4 } 2 CoBr 4 was determined by X-ray diffraction as P 12 1 / c 1. The characteristic diffuse streaks along the b * - and c * -directions were observed in the high temperature phase in both materials.
In Vitro Biaxial Stress-Strain Response of Human Skin
The development of new experimental methods and test equipment has permitted a study of the mechanical characteristics of unembalmed human cadaver skin. Excised tissue specimens were exposed to dynamic, biaxially applied displacements and forces in order to quantify the skin's anisotropic, viscoelastic stress-strain r…
Electric Field-Induced Birefringence in Liquid-Crystalline Blue Phases
The optical behaviour of liquid-crystalline 'Blue Phases' (BP) of polar cholesterogenic compounds in electric Fields up to 100 kV • cm -1 has been investigated by means of polarization microscopy. By an observation parallel to the field direction a birefringence dependent on the Field strength was detected in the BP I…
Considerations of the Stability of Pit Repassivation during Pitting Corrosion of Passive Metals
The repassivation of pits, by which pitting corrosion initiated in an aggressive environment ceases, is studied from the kinetic point of view. Consideration of irreversible thermodynamic stability suggests that the repassivation process starts as soon as the monolayer formation of the metal oxide becomes stable at th…