Materials Literature
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To understand the role of type V collagen and its spatial interrelationship with type I collagen in bone matrix, the molecule's covalent intermolecular cross-links were structurally characterized. Type V collagen containing alpha 1(V), alpha 2(V) and alpha 1(XI) chains was isolated from bovine bone and reacted with Na…
Ferroelectric BaTiO 3 thin films were prepared on Pt(111)/ SiO 2 /Si(100) substrates at 650° C by the sol-gel method. Film thickness could be varied by repeating a dip coating/heating cycle. The texture of the BaTiO 3 thin films became more dense and homogeneous when the film thickness increased. The crystalline thin…
The mean size of colloidal lead sulfide particles in nanocomposites with organic materials was varied from 4 to 80 nm by addition of sodium dodecyl sulfate or acetic acid. The refractive index and absorption coefficients of the resulting nanocomposites were measured at 632.8 and 1295 nm. The refractive index of the re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLigand K-Edge X-ray Absorption Spectroscopy as a Probe of Ligand-Metal Bonding: Charge Donation and Covalency in Copper-Chloride SystemsSusan E. Shadle, Britt Hedman, Keith O. Hodgson, and Edward I. SolomonCite this: Inorg. Chem. 1994, 33, 19, 4235–4244Publication Date (Prin…
Abstract The hydroxyl stretching region of two montmorillonites (SW y-1 , Crook County, Wyoming, USA, and JP, Jelšový Potok, Slovakia) and a ferruginous smectite (SW a-1 , Grant County, Washington, USA) have been analysed using decomposition and curve-fitting. The positions and integrated intensities of component band…
Crystal structures are reported for the sterically crowded porphyrin Copper(II) 2,3,7,8,12,13,17,18-octaethyl-5,10,15,20-tetraphenylporphyrin (Cu(OETPP), 1) and its π cation radical Cu(OETPP).+ClO4- (2). 1 was chosen to assess the consequences of oxidation in a nonplanar porphyrin on the expectation that its multiple…
Abstract Bioabsorbable poly(ester‐urethane) networks were synthesized from ethyl 2,6‐diisocyanatohexanoate ( L ‐lysine diisocyanate) (LDI) and a series of polyester triols. LDI was synthesized by refluxing L‐lysine monohydrochloride with ethanol to form the ester, which was subsequently refluxed with 1,1,1,3,3,3‐hexam…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Neutron Reflectivity Investigation of Surface and Interface Segregation of Polymer Functional End GroupsJ. F. Elman, B. D. Johs, T. E. Long, and J. T. KobersteinCite this: Macromolecules 1994, 27, 19, 5341–5349Publication Date (Print):September 1, 1994Publication History P…
Similarities of large electromechanical coupling factors ( k s ) in perovskite binary material systems were studied. Five large- k s material systems, PZT 53/47, PZNT 91/9, PMNT 67/33, PSTT 55/45 and PSNT 57/43, were compared. These five large-ks material systems were found to show four similarities: rhombohedral and…
A system of averaged equations describing the motion of a mixture of spherical compressible bubbles in an inviscid liquid is derived by the ensemble-averaging method introduced in an earlier paper [Zhang and Prosperetti, J. Fluid Mech. 267, 185 (1994)]. The averaging procedure introduces new terms in the equations, am…
In doped Mott-Hubbard insulators, the electron-phonon interaction and strong Coulomb repulsion can reinforce each other to stabilize small polarons, domain walls, and charge-density waves. We discuss how the electron-phonon coupling stabilizes domain-wall states in an antiferromagnetic spin background for small doping…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDendrimers as Building Blocks for Multilayer ConstructionShinji Watanabe and Steven L. RegenCite this: J. Am. Chem. Soc. 1994, 116, 19, 8855–8856Publication Date (Print):September 1, 1994Publication History Published online1 May 2002Published inissue 1 September 1994https://…
A picosecond pump-probe technique is used to measure the room-temperature thermal conductivity κ and longitudinal sound velocity cl of amorphous diamond (a-D) and diamondlike carbon (DLC) thin films. Both κ and cl were found to decrease with film hydrogen content. Depending on the film deposition technique, κ is in th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrothermal Synthesis and Dielectric Properties of Tetragonal BaTiO3Prabir K. Dutta, Reza Asiaie, Sheikh A. Akbar, and Weidong ZhuCite this: Chem. Mater. 1994, 6, 9, 1542–1548Publication Date (Print):September 1, 1994Publication History Published online1 May 2002Published i…
Numerical hydrodynamic simulations of the growth and collapse of a 10 μm air bubble in water were performed. Both the air and the water are treated as compressible fluids. The calculations show that the collapse is nearly isentropic until the final 10 ns, after which a strong spherically converging shock wave evolves…
Ion-assisted pulsed laser deposition has been used to produce films containing ≳85% sp3-bonded cubic boron nitride (c-BN). By ablating from a target of hexagonal boron nitride (h-BN), BN films have been deposited on heated (50–800 °C) Si(100) surfaces. The growing films are irradiated with ions from a broad beam ion s…
Translational and rotational diffusion rates in low-molecular-weight liquids tend to conform well to the predictions of the classic Stokes-Einstein-Debye model if temperature T is not too low. Specifically, the diffusion constants ${\mathit{D}}_{\mathrm{trans}}$ and ${\mathit{D}}_{\mathrm{rot}}$ are proportional to T/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase Behavior of Poly(propylene oxide)-Poly(ethylene oxide)-Poly(propylene oxide) Triblock Copolymer Melt and Aqueous SolutionsKell Mortensen, Wyn Brown, and Erling JoergensenCite this: Macromolecules 1994, 27, 20, 5654–5666Publication Date (Print):September 1, 1994Publicat…
By A. Dembo and O. Zeitouni: 344 pp., £40.00, ISBN 0 86720 291 2 (Jones and Bartlett, 1993).
FSSP (families of structurally similar proteins) is a database of structural alignments of proteins in the Protein Data Bank (PDB). The database currently contains an extended structural family for each of 330 representative protein chains. Each data set contains structural alignments of one search structure with all…