Materials Literature
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An investigation is made of the vectorial and geometrical representation of the polarization of light propagating through a weakly inhomogeneous absorbing anisotropic and optically active medium. When the approximations of geometrical optics are used, Maxwell’s equations lead to the equation ∂G/∂x3 = (i/2)(Ω + iT)G, g…
Summary Dialysis and re‐suspension of red‐brown earths showed dispersion in distilled water independent of the adsorbed cations. Whenever the electrolyte concentration is below the critical coagulation concentration the soil and clay will disperse. Mechanical disturbance greatly enhances the dispersion process. The ex…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA tetranuclear platinum compound containing two diamagnetically coupled platinum(III) atoms: x-ray structural analysis of bis[bis[.mu.-.alpha.-pyrrolidonato(1-)-N2O2]bis[cis-diammineplatinum(II, III)]](Pt-Pt) hexanitrate dihydrate, [Pt4(NH3)8(C4H6NO)4](NO3)6.2H2OKazuko Matsu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnalysis of the proton and carbon-13 NMR spectra of [Ir(Hbpy-C3,N')(bpy-N,N')2]3+: evidence for a carbon-bonded structurePeter J. Spellane, Richard J. Watts, and Calvin J. CurtisCite this: Inorg. Chem. 1983, 22, 26, 4060–4062Publication Date (Print):December 1, 1983Publicati…
Calorimetric measurements have been carried out on specimens of natrolite, mesolite, and scolecite in order to assess the thermodynamic properties of a zeolite series having the same alumino-silicate framework. Low-temperature heat capacity and high-temperature enthalpy increments of natrolite and scolecite were measu…
Abstract Neutron scattering studies have indicated that the non-coordinated water at smectite surfaces has a similar mobility to that of bulk water, but that the water coordinated to the cations is immobile on the time scale of the neutron measurements. Thus hydrophylic polymers can readily displace the non-coordinate…
The Dutch experience with pellet reactors is reviewed, with special emphasis on a new reactor concept based on crystallization on a seeding material with sodium hydroxide. During long‐term, full‐scale operations this concept has provided low‐cost softening and eliminated problems with solids disposal.
Abstract The limits and effect on cell size of silver substitution into synthetic tetrahedrite, Cu 10 (Zn,Fe,Cd 2 ) Sb 4 S 13 , are investigated for comparison with natural tetrahedrite. The limit of Ag substitution into natural zincian tetrahedrite is ∼ 4 atoms per half unit cell and into iron tetrahedrite ∼ 6.5 atom…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDielectric hysteresis and nonlinearity in a 52/48 molcopolymer of vinylidene fluoride and trifluoroethyleneT. Furukawa, A. J. Lovinger, G. T. Davis, and M. G. BroadhurstCite this: Macromolecules 1983, 16, 12, 1885–1890Publication Date (Print):December 1, 1983Publication Hist…
Evolution under the Fokker–Planck equation predicts that the central densities of globular clusters will become infinite in finite time with density profiles |$\rho\propto r^{-\alpha}$| at that moment (and |$\alpha\simeq2.21$|). The dynamical evolution of the cores after that time, t0, is predicted here. Reasons are…
Recent advances in the understanding of the dynamic plastic response of crystalline solids are discussed. At the level of individual dislocations progress is being made on measurements of dislocation mobility at high stress levels and on elastodynamics solutions for transient dislocation motions. More progress is requ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, characterization, and ground electronic state of the unstable monomeric manganese(IV) porphyrin complexes diazido- and bis(isocyanato)(5,10,15,20-tetraphenylporphinato)manganese(IV). Crystal and molecular structure of the bis(isocyanato) complexMark J. Camenzind,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConfirmation of the Mayo mechanism for the initiation of the thermal polymerization of styreneYen K. Chong, Ezio Rizzardo, and David H. SolomonCite this: J. Am. Chem. Soc. 1983, 105, 26, 7761–7762Publication Date (Print):December 1, 1983Publication History Published online1…
ABSTRACT The morphology of the valve of Coscinodiscus wailesii and the development of its siliceous architecture, studied in the SEM and TEM, is compared with valve formation in Thalassiosira eccentrica (Ehrenberg.) Cleve. Though the areolae‐architecture of these two species differs in such that the cribrum is proxima…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal complex formation with 1,10-diaza-4,7,13,16-tetraoxacyclooctadecane-N,N'-diacetic acid. An approach to potential lanthanide ion selective reagentsC. Allen Chang and Michael E. RowlandCite this: Inorg. Chem. 1983, 22, 26, 3866–3869Publication Date (Print):December 1, 19…
ABSTRACT Textural, mineralogical and chemical data are presented for glauconites and illites from the Lower Cretaceous Glauconitic Sand Formation, Alberta, Canada. Single crystal analyses by scanning transmission electron microscopy (STEM) indicate that both glauconite (29 analyses) and illite (44 analyses) correspond…
Abstract A complete conversion series for mica/smectites was found in a hydrothermal alteration envelope around Kuroko-type ore deposits at the Shinzan area, Akita Prefecture, Northeast Japan. The minerals are an alteration product of volcanic glass of Miocene age and are commonly associated with zeolites and silica m…
This paper deals with a model of silicon oxidation including stress relaxation by viscous flow during growth. Based on a Deal–Grove process and a Maxwellian stress relaxation approach, an integrodifferential equation giving the inverse growth rate dt/deox vs eox is established. Valid in any case of thickness growth ra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of 3' dangling end stacking on the stability of GGCC and CCGG double helixesSusan M. Freier, Barbara J. Burger, Dirk Alkema, Thomas Neilson, and Douglas H. TurnerCite this: Biochemistry 1983, 22, 26, 6198–6206Publication Date (Print):December 1, 1983Publication Histo…
Utilizing loading‐unloading procedures on the basis of nonlinear energy principles, an empirical method for evaluating the nonlinear fracture mechanics parameters, i.e. the nonlinear energy toughness G c , the crack growth resistance R , the J c value, and the plastic energy dissipation rate φ p , was established. The…