Materials Literature
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Simultaneous application of colloidal processing and liquid‐forming additives to alumina resulted in a sintered density of >99% in 1 h at a temperature as low as 1070°C for a commercial high‐purity alumina powder at a total dopant level of 2 mol%. The additives were 0.9% CuO + 0.9% TiO 2 + 0.1% B 2 O 3 + 0.1% MgO.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanical spectrometry of the .beta.-relaxation in poly(methyl methacrylate)E. Muzeau, J. Perez, and G. P. JohariCite this: Macromolecules 1991, 24, 16, 4713–4723Publication Date (Print):August 1, 1991Publication History Published online1 May 2002Published inissue 1 August…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrogen bonding in polybenzimidazole/poly(ether imide) blends: a spectroscopic studyP. Musto, F. E. Karasz, and W. J. MacKnightCite this: Macromolecules 1991, 24, 17, 4762–4769Publication Date (Print):August 1, 1991Publication History Published online1 May 2002Published ini…
Jute fibers were investigated to verify their possible application in reinforcement of thermoplastics. A laboratory press was modified and laminates were produced using polymer films of LDPE, HDPE, PE copolymer, and PP as interlayers. Variations of the processing parameters were carried out in order to find optimal ad…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA photochemical study of poly(3-hexylthiophene)Steven HoldcroftCite this: Macromolecules 1991, 24, 17, 4834–4838Publication Date (Print):August 1, 1991Publication History Published online1 May 2002Published inissue 1 August 1991https://pubs.acs.org/doi/10.1021/ma00017a017htt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of ligands, solvent, and variable sulfonation on dimer formation of aluminum and zinc phthalocyaninesulfonatesPaul C. Martin, Martin Gouterman, Barry V. Pepich, George E. Renzoni, and Deborah C. SchindeleCite this: Inorg. Chem. 1991, 30, 17, 3305–3309Publication Date…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of compounding and starch modification on properties of starch-filled low-density polyethyleneRoque L. Evangelista, Wei Sung, Jay Lin Jane, Robert J. Gelina, and Zivko L. NikolovCite this: Ind. Eng. Chem. Res. 1991, 30, 8, 1841–1846Publication Date (Print):August 1, 1…
Vitronectin (VN) was competitively adsorbed with human serum albumin (HSA), fibrinogen (FGN), and fibronectin (FN) from binary component mixtures in order to compare the relative affinities of these proteins for various polymer materials. Competitive adsorption was monitored by incubating radiolabeled protein solution…
Abstract An elegant procedure is proposed for obtaining components of the orthotropic or anisotropic in‐plane permeability tensor from experimental data on flow front position and time. A radial flow geometry allows the shape of the advancing flow front to be dictated by the in‐plane permeability of the fabric media.…
This manuscript considers certain aspects of mineral deposition in bone and other vertebrate calcifying tissues in order to examine physical, chemical, and biological factors important in the mineralization process. The paper in a discussion format principally presents a new data and the formulation of concepts based…
Orientational order in the isotropic phase of liquid crystals confined to 0.2-\ensuremath{\mu}m-diam cylindrical channels of Anopore membranes is measured by deuterium nuclear magnetic resonance. At temperatures deep in the isotropic phase, the measurements reveal the order of the first molecular layer at the cavity w…
Plates of calcite (CaCO3) were implanted in rabbit tibiae, and their biocompatibility and bonding ability to bone were studied. The plates were also implanted subfascially in rabbit muscle for 8 weeks, and changes on their surfaces in the body were examined. Contact microradiography and Giemsa surface stain demonstrat…
Abstract A detailed analysis of the structure of poly[( L , L ‐lactide)‐ co ‐(ε‐caprolactone)] IUPAC‐preferred name is dilactide: was performed by means of high resolution 13 C NMR (75 MHz) spectroscopy. The polyesters were obtained using various comonomer ratios and initiators aluminium tris(acetylacetonate) or the s…
The intense bright red color of the diprotonated derivatives of rubyrin (1), the largest expanded porphyrin to be characterized so far, is the source of the compound's name. A diprotonated alkyl derivative of 1 was synthesized efficiently. The molecule is nearly planar in the crystal—not unexpected for a large porphyr…
The kinetics of the reversible folding and unfolding of Escherichia coli dihydrofolate reductase have been studied by stopped-flow circular dichroism in the peptide region at pH 7.8 and 15 degrees C. The reactions were induced by concentration jumps of a denaturant, urea. The method can detect various intermediates tr…
Gallium is a metal that literally melts in your hand. It has low toxicity, near-zero vapor pressure, and a viscosity similar to water. Despite possessing a surface tension larger than any other liquid (near room temperature), gallium can form nonspherical ...Read More
Drop tubes and electromagnetic levitation are described as techniques for containerless processing. The constraints of maximum undercoolability of metals are discussed with respect to thermodynamic considerations and the onset of homogeneous nucleation. Dendrite growth occurring in undercooled melts is described on th…
ABSTRACT The nuclear gene encoding the small subunit (16S‐like) ribosomal RNA molecule was sequenced from four isolates of the marine coastal planktonic diatom Skeletonema costatum (Grev.) Cleve. Each isolate originated from a geographically separate water mass. Sufficient morphological and genetic differences were fo…
Part 1 Precipitation and nucleation: studies on the early stages of crystal nucleation, R.Popovitz-Biro et al solute clustering and secondary nucleation, M.A.Larson induction time in seeded and unseeded precipitation, M.S. van der Leeden et al dissolution kinetics of calcium phosphates involved in biomineralization, J…
In its simplest form, the geometric model of crystal growth is a third‐order, nonlinear, ordinary differential equation for θ ( s , ε ): urn:x-wiley:-wiley:00222526:media:sapm1991852129-math-0001 A needle crystal is a solution that satisfies boundary conditions urn:x-wiley:-wiley:00222526:media:sapm1991852129-math-000…