Materials Literature
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Poly(lactic acid) [PLA] and its co-polymers with glycolic acid [PLCG] have been known to be biodegradable and histocompatible for the past 20 years. Their physico-chemical and biological properties have been found suitable, in many instances, for sustaining drug release in vivo for days or months. Several dosage forms…
Zn(4,4′-bipy)2SiF6·2H2O (4,4′-bipy = 4,4′-bipyridine) consists of two perpendicular and equivalent stacks of infinite, essentially square grid [Zn(H2O)2(4,4′-bipy)2]n2n+ sheets, which interpenetrate so that any particular sheet has an infinite number of perpendicular ones enmeshed or concatenated with it.
Cu-content dependence of the shape memory characteristics in Ti–Ni–Cu alloys has been investigated by means of electrical resistivity measurements, differential scanning calorimetry and constant load thermal cycling tests. Transformation start temperature for the B19′ martensite, Ms, decreased largely, whereas that fo…
A novel convergent approach for the synthesis of dendritic macromolecules is presented and its scope and versatility demonstrated with the synthesis of a series of monodisperse dendritic polyether macromolecules based on 3,5-dihydroxybenzyl alcohol as the monomer unit up to a molecular weight of 40 689.
A treatment of the self-heating problem is presented. It is based on the laws of phenomenological irreversible thermodynamics (e.g. Onsager's relations and conservation of total energy) and is also consistent with the physical models usually considered in the isothermal drift diffusion approximation. The classical iso…
Perspective on the Analysis of Surfaces and Interfaces Instrumentation Spectral Interpretation Depth Profiling in AES and XPS Quantification of AES and XPS Applications of AES in Microelectronics AES in Metallurgy Applications of Electron Spectroscopy to Heterogeneous Catalysis Applications of XPS in Polymer Technolog…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBiodegradation of microbial copolyesters: poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and poly(3-hydroxybutyrate-co-4-hydroxybutyrate)Yoshiharu Doi, Youko Kanesawa, Masao Kunioka, and Terumi SaitoCite this: Macromolecules 1990, 23, 1, 26–31Publication Date (Print):January 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRoom temperature polyesterificationJeffrey S. Moore and Samuel I. StuppCite this: Macromolecules 1990, 23, 1, 65–70Publication Date (Print):January 1, 1990Publication History Published online1 May 2002Published inissue 1 January 1990https://pubs.acs.org/doi/10.1021/ma00203a0…
When exponentially growing Escherichia coli cell cultures were transferred from 37 degrees C to 10 degrees C or 15 degrees C, the production of a 7.4-kDa cytoplasmic protein (CS7.4) was prominently induced. The rate of CS7.4 production reached 13% of total protein synthesis within 1-1.5 hr after a shift to 10 degrees…
Abstract A simple method for estimating the oxide thickness on aluminum alloys using ESCA was investigated. The method is based on a uniform overlayer model and requires only a single ESCA measurement per sample. Expressions are shown which relate the experimental intensity ration of the oxidic and metallic Al 2p ESCA…
Introduction to Impact Phenomena (T. Nicholas & R. Recht) Material Failure at High Strain Rates (R. Woodward) Material Characterization at High Strain Rates (T. Nicholas & A. Rajendran) Introduction to Penetration Mechanics (J. Zukas) Long-Rod Penetration Mechanics (V. Hohler & A. Stilp) Analytical Models for Kinetic…
Chitosan [a (1----4) 2-amino-2-deoxy-beta-D-Glucan] is a unique polysaccharide derived from chitin. Several attempts have been made to use this biopolymer in biomedical field. The use of this material in the development of hemodialysis membranes, artificial skin, drug targetting and other applications are discussed. I…
Abstract A finite‐field method for the calculation of polarizabilities and hyperpolarizabilities is developed based on both an energy expansion and a dipole moment expansion. This procedure is implemented in the MOPAC semiempirical program. Values and components of the dipole moment (μ), polarizability (α), first hype…
ABSTRACT: Depending on the spinning and drawing conditions, two crystal structures for solution-spun poly(L-lactide) are obtained. The pseudoorthorhombic a structure (a = 10.6, b = 6.1, and c = 28.8 A) contains two chains in the unit cell and is found at relatively low drawing temperatures and/or low hot-draw ratios.…
Volume 1 addresses the selection and application of ferrous metals and alloys, including cast irons, carbon and low-alloy steels, tool steels, stainless steels, and nickel and cobalt-base superalloys. As the lead volume in the Handbook series, it lays the groundwork for understanding the hierarchical nature of metals…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthetic routes to boron nitrideRobert T. Paine and Chaitanya K. NarulaCite this: Chem. Rev. 1990, 90, 1, 73–91Publication Date (Print):January 1, 1990Publication History Published online1 May 2002Published inissue 1 January 1990https://pubs.acs.org/doi/10.1021/cr00099a004h…
The methods of synthesis, properties, structure, and electronic structure of binuclear molybdenum(III) complexes are reviewed. Dimers without monatomic bridges and dimers with oxygen, sulphur, and halogen bridging atoms are described. The effect of the bridging ligands on the nature of the M–M bond and the dependence…
Cellulose is an old polymer with new industrial applications. The derivatization of cellulose has opened up tremendous production and marketing possibilities for the adhesives industry. Various important adhesives have been derived from cellulose ethers. The structure and molecular size of cellulose and their influenc…
Despite present trends toward use of synthetic polymers developed over the last 10 or 20 years, starches are still being widely used as an adhesive in such applications as the production of paper and paperboard products, warp sizing, and bonding charcoal briquettes. Because of a unique combination of properties and lo…
Volume 20 of Reviews in Mineralogy attempted to: (1) provide examples illustrating the state-of-the-art in powder diffraction, with emphasis on applications to geological materials; (2) describe how to obtain high-quality powder diffraction data; and (3) show how to extract maximum information from available data. In…