Materials Literature
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Abstract The measurement of the polarization resistance using AC enables the corrosion losses to be determined with certain difficulties only, Despite that the AC methods are of technical interest because they allow the determination of corrosion rate/time curves without difficulties and enable potentiel fluctuation t…
Abstract The formation of polyion complexes in aqueous medium between polycations carrying charges in the chain backbone and poly(carboxylic acid)s, such as poly(methacrylic acid) (PMAA), poly(carboxylic acid) (PAA), and poly(itaconic acid) (PIA), were studied. It was found that polycations formed more stable complexe…
The two-dimensional solubility parameter approach has been applied to the prediction of solubility of one polymer in another. The solubility parameters of a number of polymers have been calculated and the second dimension shown to improve the agreement between the calculated solubility and that measured using a ternar…
The effect on the diffusion coefficient of nondissipative interactions between diffusing macromolecules is evaluated for two-component solvent-macromolecule solutions. For linear concentration gradients, the generalized Stokes-Einstein relation is obtained from purely microscopic arguments. Application of these result…
Hydrothermal experiments with fresh basalt in a high pS 2 environment yielded cordierite–sulfide-bearing assemblages. These results suggest that during thermal metamorphism of a volcanic exhalative sulfide deposit, progressive sulfurization of the enclosing basalts takes place. Cordierite–anthophyllite and cordierite–…
An extensive computer program has been developed to check the internal consistency of published, numeric, crystallographic data prior to storage in the data files of the Cambridge Crystallographic Data Centre. The coding is in Fortran IV for an IBM 3701165 with 1 megabyte store. The atomic coordinates, constitution an…
Abstract A mathematical representation of the plasticating process in a reciprocating‐screw injection‐molding machine has been formulated as a design tool for simulating the effect of processing parameters on the melting performance, the melt temperature, and the pressure profile. Comparisons with experimental data on…
The dose dependence of the lattice parameter change for neutron-irradiated copper has been measured in the range (1.0–10.8)×1018 neutrons/cm2. The lattice parameter changes were measured directly by using a multiply reflecting monochromator, and an analysis of the effects of misalignment in the geometry has been given…
Longitudinal and transverse relaxation times of 119Sn have been measured as a function of temperature at several field strengths in SnCl4, SnBr4, and SnI4. T2 in all three liquids is field independent and is governed by scalar coupling to the halogen. T1 is strongly field dependent in SnBr4 and SnI4 and exhibits a min…
Crystallization during melt spinning is studied as an example of the nonisothermal crystallization of polymers. The following equation is derived, taking the temperature distribution within a filament into consideration: where T = temperature, X = crystallinity, κ = thermal diffusivity, V = velocity, ΔH = heat of crys…
The packings considered in this paper are packings of a unit sphere in iV-dimensional Euclidean space by an infinite number of unequal spheres. More specifically, we are interested in complete packings, those which exhaust the volume of the packed sphere.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPorphyrin-annulene redox-related ligand pair. Electrochemical synthesis and characterization of the reduction products of the cobalt, copper, and nickel complexes of a tetraaza[16]annuleneNurhan Takvoryan, Keith Farmery, Vladimir Katovic, Frank V. Lovecchio, Ernest S. Gore,…
In a study on the mechanism of pitting corrosion, a gas evolution in the pit has been observed. This gas has been gaschromatographically identified as hydrogen. The explanation of the evolution of hydrogen by the acidification of the pit electrolyte and the potential drop across the pit have been experimentally proved…
<div class="htmlview paragraph">The analysis method presented in this paper provides a systems approach to determine the influence of body connection flexibility upon automobile body structural response. In this approach, a baseline finite element model is created to simulate the in-plane response of the passeng…
A model for cholesteric liquid crystals with biaxial molecules is introduced. It is found that the biaxial order parameter for such systems is of order ${({q}_{0}a)}^{2}$ where $a$ is a molecular length and ${q}_{0}=\frac{2\ensuremath{\pi}}{p}$ where $p$ is the helical pitch. The generalized susceptibility is calculat…
Negatively charged titanium and zirconium complexes with α-hydroxy carboxylic acids and fluorides can be exhausted on the positively charged wool fibre in acid conditions, the result being a significant improvement in the natural flame-resistance of wool that is fast to washing and dry-cleaning. The complexes with car…
For part 2, see Am. Jour. Sci., Vol. 272, p. 840, 1972; see also this Bibliography, Berner and Morse, 05
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSquare-planar transitioin metal complexes with tetradentate thioiminato Schiff base ligandsPatricia R. Blum, Richard M. C. Wei, and Sue C. CummingsCite this: Inorg. Chem. 1974, 13, 2, 450–456Publication Date (Print):February 1, 1974Publication History Published online1 May 2…
Article Notizen: Zur Struktur ternärer Chalkogenide des Thalliums mit Aluminium, Gallium und Indium, XXII* / On the Structure of Ternary Thalliumchalkogenides with Aluminium, Gallium and Indium, XXII* was published on February 1, 1974 in the journal Zeitschrift für Naturforschung B (volume 29, issue 1-2).
We examine the temperature and frequency dependence of the proton spin-lattice relaxation rate $\frac{1}{{T}_{1}}$, as a probe of the electron-spin dynamics of the quasi-one-dimensional exchange-coupled paramagnet TMMC [${(\mathrm{C}{\mathrm{H}}_{3})}_{4}$ NMn${\mathrm{Cl}}_{3}$]. The rate is measured from 5.5-16 MHz…