Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCritical molecular weight for block copolymer reinforcement of interfaces in a two-phase polymer blendCostantino Creton, Edward J. Kramer, and Georges HadziioannouCite this: Macromolecules 1991, 24, 8, 1846–1853Publication Date (Print):April 1, 1991Publication History Publis…
We previously reported that acetaldehyde increases the production of type I collagen in cultured rat fat-storing cells. We studied the regulation of this effect by determining the expression of procollagen type I, fibronectin and transforming growth factor-beta 1 messenger RNAs in passage 1 and 2 cultures of fat-stori…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolubility and heat of solution of potassium dihydrogen citrateThomas V. Van AukenCite this: J. Chem. Eng. Data 1991, 36, 2, 255–257Publication Date (Print):April 1, 1991Publication History Published online1 May 2002Published inissue 1 April 1991https://pubs.acs.org/doi/10.1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of novel poly(ether ketones) containing the o-dibenzoylbenzene moietyRina Singh and Allan S. HayCite this: Macromolecules 1991, 24, 9, 2637–2639Publication Date (Print):April 29, 1991Publication History Published online1 May 2002Published inissue 29 April 1991https…
Abstract The phase transitions in CsSnCl 3 and CsPbBr 3 have been studied by X-ray powder diffraction, by 81 Br-NQR and by 'H-, 119 Sn-, and 113 Cs-NMR. At room temperature in air CsSnCl 3 forms a hydrate which can be dehydrated to the monoclinic phase II of CsSnCl 3 . The high temperature phase I has the Perovskite s…
Results from centrifuge and 1‐g model tests of projectile penetration into granular soils are described. Solid spherical projectiles in four calibers were fired into uniform samples of dry sand at approximately 305 m/s. Comparison to full‐scale test results verified the suitability of the centrifuge testing technique…
The origin of “sonochemistry” is acoustic cavitation: the formation, expansion, and implosive collapse of bubbles in liquids irradiated with ultrasound. The compression of such bubbles generates intense local heating, which has been quantified recently from both chemical kinetic thermometry and from high-resolution so…
The temperature and frequency dependence of $^{7}\mathrm{Li}$, $^{19}\mathrm{F}$, and $^{23}\mathrm{Na}$ nuclear-spin relaxation (NSR) has been studied in various fluorozirconate (Zr-F) glasses between about 0.4 and 600 K. Below about 200 K the NSR is caused by low-frequency excitations of disordered modes intrinsic t…
Abstract The rehydration properties and behavior of interlayer cations of Ca-, Mg-, Na-, and K-saturated homoionic saponite and vermiculite heated at various temperatures were examined and their rehydration mechanisms elucidated. The most notable features of saponite were (1) except for the Mg-saturated specimen, all…
An electronic technique which greatly increases the apparent permeability of a magnetic core of a current transformer, without a galvanic connection to either of the usual primary or secondary winding circuits, is described. The number of turns and the turns ratio can be selected independently as desired. Means are av…
When the short-time electric strength (E/sub st/) of low loss polymers is determined in accordance with IEC 243, breakdown is usually caused by 'surface discharges'. Unless there are gross isolated defects, E/sub st/ is more dependent on the thickness d than on the area of the samples. E/sub st/ is affected by the per…
Abstract Possibilities and thermal preconditions of the preparation of filled β‐PP composites were studied. Two types of mineral fillers (chalk and talc) were found considerably different. Chalk, as a weak α‐nucleating agent, exerts minimum influence on the rate of crystallization, on the polymorphic composition, and…
We have calculated for the first time the contribution to the shear viscosity η of a dilute suspension of hard spheres from the full hydrodynamic interactions involving three spheres. Using the multiple scattering theory, we find the third order coefficient k3 in η=η0(1+k1Φ+k2Φ2+k3Φ3 +⋅⋅⋅) to be 6.40 for a suspension…
Different models for linear transformers are discussed relative to their use in circuit simulation. These models include: the reluctance model, the permeance model, the inductance matrix model, the T-model and the reduced T-model. Equations relating the parameter values of the models are derived for the two- and three…
Abstract Aqueous gels of unaltered (oxidized) and chemically reduced ferruginous smectite (SWa-1 from the Source Clays Repository of The Clay Minerals Society) were characterized by transmission electron microscopy, electron diffraction, and energy-dispersive X-ray fluorescence to establish details regarding their tex…
Abstract The potential role of phosphoproteins in the regulation of carbonate biomineralization is examined by comparing the EDTA‐soluble matrix (SM) of bivalve shells from representatives of eight superfamilies having various aragonitic and calcitic microstructures. In each case the SM is separated into two fractions…
High-resolution powder diffraction coupled with the total-pattern-fitting technique revealed unusual and hitherto unreported diffraction effects for samples of copper(II) oxide. Data were obtained with a conventional diffractometer and strictly monochromatic Cu Kα1 radiation and also with the Daresbury Laboratory sync…
Cristallisation a 294 K dans Pca2 1 avec a=12,924, b=14,034, c=15,364 A, Z=4; affinement jusqu'a R=0,032. A T=349 K, cristallisation dans Pcab avec a=13,003, b=14,038, c=15,450 A, Z=4; affinement jusqu'a R=0,044. Dans la phase haute temperature, les anions sont des bioctaedres centrosymetriques et trois des cinq catio…
The average structure of mullite with approximate composition SiOr.2AlrO, has been refined using single-crystal neutron ditrraction data. A split-site model for both tetrahedral and O positions was refined in order to reflect the local structural variation arising from both O-vacancy and Al-Si ordering. The resulting…
Modeling of shape-memory alloys represents a multiscale problem due to the occurrence of a martensite/austenite phase transformation and a microstructure in the deformation gradient typical for a martensitic phase. Inspired by relaxation in a static situation, a limit passage between two modeling scales, called micro-…