Joseph W. Lauher、James A. Ibers1974-07-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemistry of cobalt porphyrins. II. Characterization and structure of meso-tetraphenylporphinatobis(imidazole)cobalt(III) acetate monohydrate monochloroformate, [Co(Im)2(TPP)][OAc].H2O.CHCl3Joseph W. Lauher and James A. IbersCite this: J. Am. Chem. Soc. 1974, 96, 14, 4…
Metal complexes synthesis and propertiesPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms
W. Greubel1974-07-01Applied Physics Letters
With the homeotropic boundary condition, the field-induced cholesteric-to-nematic texture transition can show a large hysteresis effect such that at the same field strength either the cholesteric or the nematic texture is stable.
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsCharacterization and Applications of Magnetic Nanoparticles
Gilbert T. Feke、W. Prins1974-07-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpinodal Phase Separation in a Macromolecular Sol → Gel TransitionG. T. Feke and W. PrinsCite this: Macromolecules 1974, 7, 4, 527–530Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Published inissue 1 July 1974https://pubs.acs.org/doi/10.1…
Surfactants and Colloidal SystemsPolymer Surface Interaction StudiesBlock Copolymer Self-Assembly
William T. Winter、A. Sarko1974-07-01Biopolymers
Abstract The conformation and crystalline packing of V‐anhydrous amylose has been investigated by a combination of linked atom model building and X‐ray diffraction analysis. The unit cell, the P2 1 2 1 2 1 space group, the left‐handed sixfold helical conformation with all O(6) in gt rotational positions, and the intra…
Carbohydrate Chemistry and SynthesisEnzyme Structure and FunctionEnzyme Production and Characterization
R. J. Bratton1974-07-01Journal of the American Ceramic Society
A translucent polycrystalline MgAl 2 O 4 ceramic was prepared from finely divided coprecipitated spinel in which a small amount of CaO added as a sintering aid was uniformly distributed. The CaO promotes densification through the formation of a liquid phase at the sintering temperatures. Depending on the sintering tre…
Ferroelectric and Piezoelectric MaterialsAdvanced ceramic materials synthesisMicrowave Dielectric Ceramics Synthesis
David Carlson1974-07-01Journal of the American Ceramic Society
A theory is presented for the ion depletion of glass beneath a blocking anode. The theoretical model is based on the assumption that the alkali ions in an alkali silicate glass have a much greater mobility than the nonbridging oxygen ions in the alkali‐depleted region. In this case, the dc conduction properties of the…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsPhotonic Crystals and Applications
J. G. LEIPOLDT、L. D. C. Bok、P. J. Cilliers1974-07-01Zeitschrift für anorganische und allgemeine Chemie
Abstract K 4 W(CN) 8 · 2 H 2 O was prepared by the reduction of WO (in potassium cyanide medium) by KBH 4 . The reduction proceeds on the slow, drop‐by‐drop addition of concentrated acetic acid. The synthesis is simple and efficient because the reduction and complexation are accomplished at the same time.
Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesPolyoxometalates: Synthesis and Applications
Robert J. Young1974-07-01Philosophical magazine
The critical resolved shear stress (C.R.S.S.) for (010) [001] slip in oriented high- density polyethylene (HDPE) has been measured as a function of temperature between 0° and 100°C. The variation of the C.R.S.S. with temperature has been interpreted in terms of yield by means of the thermal activation of dislocations…
Polymer crystallization and propertiesComposite Material MechanicsFiber-reinforced polymer composites
R. Bonart、E. H. Müller1974-07-01Journal of Macromolecular Science Part B
In thermoplastic urethane elastomers, phase separation between hard and soft segments resulting in a domain structure is an essential condition for a sufficiently high heat distortion temperature. The state of segregation, i.e., the domain structure, is characterized by the following aspects: 1) the size distribution,…
Polymer Nanocomposites and PropertiesPolymer composites and self-healingMaterial Properties and Applications
Peter C. Schultz1974-07-01Journal of the American Ceramic Society
The optical absorption of 3d transition elements in fused silica was studied. A series of high‐quality silica glasses doped with 0.01 to 0.1 wt% of each transition element (V through Cu) was prepared by a vapor hydrolysis technique. Their optical spectra were measured, and their practical absorptivities were calculate…
Glass properties and applicationsPhotonic Crystals and ApplicationsPhotorefractive and Nonlinear Optics
Virgil A. Marple、Benjamin Y. H. Liu1974-07-01Environmental Science & Technology
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacteristics of laminar jet impactorsVirgil A. Marple and Benjamin Y. H. LiuCite this: Environ. Sci. Technol. 1974, 8, 7, 648–654Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Published inissue 1 July 1974https://doi.org/10.1021/es60092…
Combustion and Detonation ProcessesAerosol Filtration and Electrostatic PrecipitationEngineering and Material Science Research
A. F. Garito、Alan J. Heeger1974-07-01Accounts of Chemical Research
ADVERTISEMENT RETURN TO ISSUEPREVArticleDesign and synthesis of organic metalsAnthony F. Garito and Alan J. HeegerCite this: Acc. Chem. Res. 1974, 7, 7, 232–240Publication Date (Print):July 1, 1974Publication History Published online1 May 2002Published inissue 1 July 1974https://pubs.acs.org/doi/10.1021/ar50079a004htt…
Organometallic Complex Synthesis and CatalysisIonic liquids properties and applicationsOrganic and Molecular Conductors Research
Vidya rhushan gupta、Asok Majumdar、K. K. Seth1974-07-01Textile Research Journal
The structural changes on heat-setting and friction-twisted texturing of commercial nylon 6 multifilament yarn have been studied over a range of heater temperature and heater-contact time. Both heat-setting and texturing result in increase of crystalline content and decrease of crystallite orientation. The changes in…
Polymer crystallization and propertiesTextile materials and evaluationsFiber-reinforced polymer composites
Edward J. Krämer1974-07-01Journal of Macromolecular Science Part B
A zone of diffuse non-Hookean shear strain is shown by birefringence measurements to initiate before, and to propagate ahead of, shear bands in glassy polystyrene. A moiré analysis of the displacements around the propagating shear band packet reveals that the shear band packet, although highly visible, contributes onl…
Polymer crystallization and properties
Jürgen Hesse、A Rubartsch1974-07-01OpenAlex
A calculation scheme for the evaluation of hyperfine field distributions from overlapped Mossbauer spectra is being proposed. A different procedure for the same purpose has been used by Window (1971). Based on simulated Mossbauer spectra both methods are applied for three special cases. The obtained results are compar…
Geophysical and Geoelectrical MethodsElectromagnetic Scattering and AnalysisElectron and X-Ray Spectroscopy Techniques
Uwe Kreibig1974-07-01OpenAlex
Specimen size dependences of the dielectric constant and of its variations with temperature have been investigated by measuring the optical plasma resonance absorption of small silver particles embedded in glass. The following relations hold at the wavelength 405 nm: epsilon 2 (imaginary part at 300K)=0.23+2.64/R, and…
Gold and Silver Nanoparticles Synthesis and ApplicationsLaser-induced spectroscopy and plasmaSurface and Thin Film Phenomena
Gideon John Davies、Claude M. Penchina1974-06-28Proceedings of the Royal Society of London A Mathematical and Physical Sciences
Abstract In 1973, Clark & Walker showed that the GR1 doublet splits, under uniaxial stresses, in a way closely characteristic of transitions between E and A ground states and a T excited state. To clear up certain anomalies in their results, and to extend the analysis, independent experimental results are describe…
High-pressure geophysics and materialsDiamond and Carbon-based Materials ResearchAtomic and Molecular Physics
L. Piché、R. Maynard、Siegfried Hunklinger 等 4 位作者1974-06-24Physical Review Letters
The temperature dependence of the longitudinal sound velocity has been measured in vitreous silica between 0.28 and 4.2 K and at frequencies between 30 and 150 MHz. With decreasing temperature the sound velocity does not increase monotonically towards its value at $T=0$ K, but reaches a maximum around 2 K and decrease…
Material Dynamics and PropertiesGlass properties and applicationsThermography and Photoacoustic Techniques
Franz Wegner1974-06-21Journal of Physics C Solid State Physics
A generalization of Wilson's renormalization group equation is discussed. A large class of equivalent fixed points exists for each fixed point. The eigen perturbations fall into two classes: (i) scaling operators whose scaling exponents are independent of the fixed point within the class of equivalent fixed points, an…
Solid-state spectroscopy and crystallography
Z. Tomkowicz、B. van Laar1974-06-16physica status solidi (a)
The magnetic structure of the layer type compound α-NaFeO2 has been determined. The magnetic ordering scheme is distinctly different from that in NaCrX2 (X = S, Se), in accordance with the fact that no two-dimensional behaviour has been observed. An estimation for the magnitude of the various exchange interactions has…
Magnetic and transport properties of perovskites and related materialsSolid-state spectroscopy and crystallographyHeusler alloys: electronic and magnetic properties