Materials Literature
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The nature of a biomaterial surface governs the processes involved in biological response. Surface properties such as surface chemistry, surface energy, and morphology may be measured in order to understand the surface region of a biomaterial. In this article, we describe the surface characteristics of a few common bi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFenestranes and the flattening of tetrahedral carbonBhaskar Rao. Venepalli and William C. AgostaCite this: Chem. Rev. 1987, 87, 2, 399–410Publication Date (Print):April 1, 1987Publication History Published online1 May 2002Published inissue 1 April 1987https://pubs.acs.org/do…
A novel synthesis for the covalent linkage of cobalt(II) tetrasulfophthalocyanine (Co^(II)TSP) to the surface of titanium dioxide (TiO_2) particles (d ≤ 0.5 µm) is described. Upon irradiation with light that exceeds the bandgap energy (E_g) of TiO_2 (i.e., ⋋ 5 380 nm), Co^(II)TSP is reduced to Co^ITSP under anoxic con…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUnusual orientation of axial ligands in metalloporphyrins. Molecular structure of low-spin bis(2-methylimidazole)(meso-tetraphenylporphinato)iron(III) perchlorateW. Robert Scheidt, John F. Kirner, J. L. Hoard, and Christopher A. ReedCite this: J. Am. Chem. Soc. 1987, 109, 7,…
Abstract The solubility behavior of O‐methyl cellulose (MC) in water was investigated in terms of the distribution of substituents along the cellulose chain as well as in the anhydroglucose (AHG) units. For this purpose, three different types of MC samples were prepared by respective homogeneous reaction, i.e.. (i) me…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpin coupling in metalloporphyrin .pi.-cation radicalsBrian S. Erler, William F. Scholz, Young Ja Lee, W. Robert Scheidt, and Christopher A. ReedCite this: J. Am. Chem. Soc. 1987, 109, 9, 2644–2652Publication Date (Print):April 1, 1987Publication History Published online1 Ma…
Ceramics fibers in the system Si-C-N-O prepared by pyrolysis of melt-spun, cured, amorphous organosilicon polymers have a predominantly amorphous chemical structure, consisting of carbon, nitrogen, and oxygen bonds to silicon. These amorphous silicon oxycarbonitrides have chemical bonding approach a random distributio…
The phase diagram of a two-dimensional system consisting of colloids is investigated within the Kosterlitz-Thouless-Halperin-Nelson-Young theory of dislocation-mediated two-dimensional melting. We also present results for the interaction energy, the phonon spectrum, and the longitudinal and transverse sound velocity f…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic model for tensile deformation of polymersYves Termonia and Paul SmithCite this: Macromolecules 1987, 20, 4, 835–838Publication Date (Print):April 1, 1987Publication History Published online1 May 2002Published inissue 1 April 1987https://pubs.acs.org/doi/10.1021/ma001…
Deacetoxycephalosporin C synthetase (expandase), which catalyzes ring expansion of penicillin N to deacetoxycephalosporin C (DAOC), has been stabilized in vitro and purified to near homogeneity from the industrially important fungus Cephalosporium acremonium. Throughout the purification, the expandase activity remaine…
This review is concerned with the fundamentals of the theory of the transport of atoms through crystalline solids, such as may result from the existence of gradients of chemical and isotopic composition, electrical potential, stress, temperature, etc. The main emphasis is on the statistical description of these proces…
The electronic spectrum and eigenstates of a one-dimensional aperiodic Thue-Morse crystal isstudied with an on-site tight-binding model. The relation between the constructing elements andthe hierarchical splitting of the bands into subbands is analysed. The eigenstates are shown to be much more similar to those of a p…
Abstract The structure of ethylene copolymers modified by α‐olefins has become an area of intense investigation since the successful commercialization of so‐called linear low‐density polyethylene (LLDPE) resins. The molecular structure of a series of typical commercial LLDPE copolymers was investigated and compared to…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSuperconductivity above liquid nitrogen temperature: preparation and properties of a family of perovskite-based superconductorsE. M. Engler, V. Y. Lee, A. I. Nazzal, R. B. Beyers, G. Lim, P. M. Grant, S. S. P. Parkin, M. L. Ramirez, J. E. Vazquez, and R. J. SavoyCite this: J…
Abstract The underpotential deposition of Cu onto Au(111) in different electrolytes has been investigated by LEED, RHEED and AES. Ordered layers of (√3 × √3) R30° and (2.2 × 2.2) type were found for Cu at medium coverages in sulfate and perchlorate solutions, respectively. The formation of different superstructures in…
A high-resolution infrared spectroscopic investigation of structure related to the O-H dipole stretching mode (around 3500 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$) was carried out in ${\mathrm{SrTiO}}_{3}$. We discuss various models for the position of the hydrogen impurity in the matrix and justify the position th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTViscosity of the eutectic dilithium carbonate-disodium carbonate-dipotassium carbonate meltTatsuhiko Ejima, Yuzuru Sato, Tsutomu Yamamura, Kyoko Tamai, mayasayuki Hasebe, Mark S. Bohn, and George J. JanzCite this: J. Chem. Eng. Data 1987, 32, 2, 180–182Publication Date (Prin…
Polyimide precursors were synthesized from a diamine and a diacid chloride that was derived from the reactant with promellitic dianhydride and o-nitrobenzyl alcohol. Their thermal properties were studied in nitrogen using dynamic thermogravimetry, and the photoreaction mechanism was investigated by ultraviolet and inf…
Prony's method is usually used for the determination of poles from experimental data in the singularity expansion method (SEM) literature, It is the aim here to show that this is not the best method and that Jain's pencil-of-functions (POF) method can be generalized to provide a better method. An example of such a met…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal and molecular structure of bis(imidazole)(meso-tetraphenylporphinato)iron(III) chloride. A classic molecule revisitedW. Robert Scheidt, Sarah R. Osvath, and Young Ja LeeCite this: J. Am. Chem. Soc. 1987, 109, 7, 1958–1963Publication Date (Print):April 1, 1987Publicat…