Materials Literature
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Based on biochemical and ultrastructural data, hyphochytriomycetes are believed to share an ancestor with oomycetes and heterokont algae. In order to study the phylogeny of the hyphochytriomycetes, we determined both the small- and large-subunit ribosomal RNA sequence of Hyphochytrium catenoides. Phylogenetic trees we…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNovel Synthetic Routes to Carbon NitrideM. Todd, J. Kouvetakis, T. L. Groy, D. Chandrasekhar, David J. Smith, and P. W. DealCite this: Chem. Mater. 1995, 7, 7, 1422–1426Publication Date (Print):July 1, 1995Publication History Published online1 May 2002Published inissue 1 July 19…
Abstract The 2,2′-bi-1H-imidazole (H2BIM) derivatives were studied from the point of the interplay of proton-transfer (PT) and electron (charge)-transfer (CT) interactions. Seven new states among the speculated 25 independent species were identified based on the study of their redox and acid dissociation properties. I…
The influence of chirality on the nonlinear optical properties of poly(isocyanide)s is examined. It is found that the chiral and nonlinear properties can occur on different levels of the molecular structure and can therefore be separately tuned, but that they still can be coupled together. The NLO properties of chiral…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoating Polystyrene Particles by Adsorption of Hydrophobically Modified DextranC. Fournier, M. Leonard, I. Le Coq-Leonard, and E. DellacherieCite this: Langmuir 1995, 11, 7, 2344–2347Publication Date (Print):July 1, 1995Publication History Published online1 May 2002Published…
Poly(viny1 alcohol) (PVA) and citric acid (CA) are a commonly used binder and dispersant, respectively, for aqueous Al 2 O 3 slurries. The competitive adsorption of these additives on A1 2 O 3 from aqueous solution was studied, as was the influence of this competition on the binder migration in centrifugally cast comp…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfrared spectroscopy and vibrational relaxation of CHx and CDx stretches on synthetic diamond nanocrystal surfacesH.-C. Chang, J.-C. Lin, J.-Y. Wu, and K.-H. ChenCite this: J. Phys. Chem. 1995, 99, 28, 11081–11088Publication Date (Print):July 1, 1995Publication History Publ…
We calculate the lubrication force that acts in the normal direction between spherical surfaces bearing grafted polymer brushes and immersed in a viscous fluid. Brinkman's equation is employed to describe the flow in the brushes. For noncompressed brushes we include a slip approximation that applies to poorly permeabl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTActive Sites on SiO2: Role in CH3OH DecompositionEdward A. Wovchko, John C. Camp, John A. Glass Jr., and John T. YatesCite this: Langmuir 1995, 11, 7, 2592–2599Publication Date (Print):July 1, 1995Publication History Published online1 May 2002Published inissue 1 July 1995htt…
Quasielastic neutron scattering measures ia a very direct way the decay of density correlations in the time range psec … nsec and on length scales of the order of ångströms. It seems therefore ideally suited to directly observe the critical dynamics predicted by the mode coupling theory of the glass transition. We rev…
A simple synthetic method for preparing aragonite whiskers has been developed. A suspension of CaCl 2 ‐MgCl 2 ‐Mg(OH) 2 with pH ∼9 has been prepared by adding Ca(OH) 2 to MgCl 2 aqueous solution. CaCO 3 whiskers (aragonite phase) have been prepared easily by blowing CO 2 ‐containing gas into the suspension. The whiske…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAppraisal of Chemical Bond Making, Bond Breaking, and Electron Transfer in Solution in the Light of the Principle of Maximum HardnessPratim K. Chattaraj, Andres Cedillo, Robert G. Parr, and Edward M. ArnettCite this: J. Org. Chem. 1995, 60, 15, 4707–4714Publication Date (Pri…
Lead titanate sols were prepared by a sol‐gel method from lead acetate trihydrate, Pb(OOCCH 3 ) 2 3H 2 O, and titanium di‐isopropoxide bis‐acetylacetonate, Ti (OC 3 H 7 ) 2 ‐ (CH 3 COCHCOCH 3 ) 2 , in 1,3‐propanediol, HO(CH 2 ) 3 OH, as solvent. IR analysis and NMR spectroscopic techniques were used to study the react…
Abstract Sophisticated methods have been put forward in the literature to calculate Debye temperatures from the elastic constants c ik . As a simple alternative method for cubic crystals, a relation is often used that correlates Debye temperature and bulk modulus (c 11 + 2c 12 )/3 by a square‐root law. It is shown tha…
Abstract In the first part of this series of papers, the tensile properties of microcellular foams of polystyrene (PS), styrene‐acrylonitrile copolymer (SAN), and polycarbonate (PC) were reported. In this part, the impact properties of unnotched, sharply and bluntly notched samples of microcellularly foamed PS and SAN…
Abstract The hydrothermal metamorphism of a sequence of Pliocene‐aged seamount extrusive and volcanoclastic rocks on La Palma includes a relatively complete low‐ P‐T facies series encompassing the zeolite, prehnite‐pumpellyite, and greenschist facies. The observed mineral zonations imply metamorphic gradients of 200–3…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDNA-tentacle porphyrin interactions: AT over GC selectivity exhibited by an outside binding self-stacking porphyrinNancy E. Mukundan, Gabor Petho, Dabney W. Dixon, and Luigi G. MarzilliCite this: Inorg. Chem. 1995, 34, 14, 3677–3687Publication Date (Print):July 1, 1995Public…
The subject contrast of bony anatomy in megavoltage medical radiographs is very low, making detection of bony landmarks difficult if additional noise sources are introduced into the images. One source of noise, which is inherent to the x-ray detection process, is x-ray energy absorption noise. X-ray energy absorption…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfluence of the Chain Length and Surface Density on the Conformation and Mobility of n-Alkyl Ligands Chemically Immobilized onto a Silica SurfaceIrene. Yarovsky, Marie-Isabel. Aguilar, and Milton T. W. HearnCite this: Anal. Chem. 1995, 67, 13, 2145–2153Publication Date (Pri…
Abstract Poly(( R )‐3‐hydroxybutyrate), P(3HB), is produced by Alcaligenes eutrophus from fructose or butyric acid. The kinetics and mechanism of P(3HB) biosynthesis are presented. Four types of copolymers, poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyvalerate), poly (3‐hydroxybutyrate‐ co ‐3‐hydroxypropionate), poly (3‐hydro…