Materials Literature
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Abstract 1,2-Bis(3,5-dimethyl-2-thienyl)perfluorocyclopentene which shows a reversible color change from colorless to yellow by UV irradiation was synthesized. The color of the photogenerated closed-ring forms was dependent on the substitution position of the thiophene rings to the perfluorocyclopentene moiety.
We describe our analysis of primordial germ cell migration in Drosophila wild-type and mutant embryos using high resolution microscopy and primary culture in vitro. During migratory events the germ cells form transient interactions with each other and surrounding somatic cells. Both in vivo and in vitro they extend ps…
Abstract The experience of microparacrystals, in intermediate stages between “perfect crystalline” and “amorphous structures,” and as “building bricks” in condensed matter, has become accepted as a basic physical concept. Their existence was proven by optical and x-ray diffraction studies. A review and summary of the…
Early Miocene through Pleistocene diatom datum levels are identified along with North Pacific diatom zones in the sections cored during Ocean Drilling Program Leg 145 at Sites 881 to 884 and 887. Recording of the first complete late early Miocene through Miocene magnetostratigraphies in the North Pacific at Sites 884…
Abstract The development of multiphase liquid‐liquid morphologies during mixing at small Reynolds numbers has been modeled. The mixing process is divided into (i) stretching of dispersed drops. (ii) breakup of the liquid threads formed, and (iii) coalescence of the final droplets upon collision. Rules and criteria of…
In this study, adhesion and spreading of human skin fibroblasts on gradient surfaces of dichlorodimethylsilane (DDS) coupled to glass was investigated. Gradient surfaces were prepared by the diffusion technique and characterized by the Wilhelmy plate technique and characterized by the Wilhelmy plate technique for thei…
Compression experiments in which plastically deformed austenite is allowed to transform to bainite have revealed that bainite, like martensite, is susceptible to mechanical stabilisation. The overall transformation kinetics becomes slower and the maximum attainable fraction of bainite decreases in deformed austenite.…
Structural instabilities and electronic properties of ${\mathrm{PrZrO}}_{3}$ are investigated using local-density calculations. Substantial hybridization is found in the electronic band structure, both between O 2p and Zr 4d states and between O 2p and Pb s and p states. A very strong \ensuremath{\Gamma} point phonon…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Intramolecular Electron- and Energy-Transfer Reactions of Polyyne- or Polyene-Bridged DiporphyrinsAtsuhiro Osuka, Nobuhiro Tanabe, Shigeki Kawabata, Iwao Yamazaki, and Yoshinobu NishimuraCite this: J. Org. Chem. 1995, 60, 22, 7177–7185Publication Date (Print):N…
The effect of dopants on the characteristics of titania particles made by oxidation of TiCl 4 in a laminar diffusion flame reactor is presented. Introduction of dopant SiCl 4 inhibits the transformation of anatase to rutile, due to the formation of interstitian solid solution of SiO 2 and TiO 2 . Silica decreases the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNoble Metal (RuIII, PdII, PtII) Substituted "Sandwich" Type Polyoxometalates: Preparation, Characterization, and Catalytic Activity in Oxidations of Alkanes and Alkenes by PeroxidesRonny Neumann and Alexander M. KhenkinCite this: Inorg. Chem. 1995, 34, 23, 5753–5760Publicati…
Abstract The acidification of aqueous solutions containing Na2MoO4·2H2O in the presence of a chiral lysine ligand (d- and l-form) gives octamolybdates coordinating two lysine ligands, Na2[Mo8O26(d-lysH2)2]·8H2O (Mo8-d) and Na2[Mo8O26(l-lysH2)2]·8H2O (Mo8-l) (where lysH2 is 2,6-diammoniohexanoato), respectively. These…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTControl of a Biphasic Surface Reaction by Oxygen Coverage: The Catalytic Oxidation of Ammonia over Pt{100}J. M. Bradley, A. Hopkinson, and D. A. KingCite this: J. Phys. Chem. 1995, 99, 46, 17032–17042Publication Date (Print):November 1, 1995Publication History Published onli…
The tricarboxylic acid cycle enzyme fumarase catalyzes the interconversion of fumarate to L-malate. Escherichia coli contains three biochemically distinct fumarases. While the fumA and fumB genes encode heat-labile, iron-containing fumarases, the fumC gene product is a heat-stable fumarase which does not require iron…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEpoxy-Aromatic Diamine Kinetics. Part 1. Modeling and Influence of the Diamine StructureE. Girard-Reydet, C. C. Riccardi, H. Sautereau, and J. P. PascaultCite this: Macromolecules 1995, 28, 23, 7599–7607Publication Date (Print):November 1, 1995Publication History Published o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel Aromatic Polyimides for Nonlinear OpticsDong Yu, Ali Gharavi, and Luping YuCite this: J. Am. Chem. Soc. 1995, 117, 47, 11680–11686Publication Date (Print):November 1, 1995Publication History Published online1 May 2002Published inissue 1 November 1995https://doi.org/10.…
Based on experimental findings, a mechanism of structural formation during the induction period of polymer crystallization is proposed. Recently we have found that, during the induction period of crystallization of poly(ethylene terephthalate) before crystal nuclei are produced, a correlation peak appears in small-ang…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDispersion Polymerization of Methyl Methacrylate Stabilized with Poly(1,1-dihydroperfluorooctyl acrylate) in Supercritical Carbon DioxideYu-Ling Hsiao, Elise E. Maury, Joseph M. DeSimone, Simon Mawson, and Keith P. JohnstonCite this: Macromolecules 1995, 28, 24, 8159–8166Pub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA New Type of Thermally Induced Spin Transition Associated with an Equatorial .dblarw. Axial Conversion in a Copper(II)-Nitroxide ClusterFabrice Lanfranc de Panthou, Elie Belorizky, Roberto Calemczuk, Dominique Luneau, Christophe Marcenat, Eric Ressouche, Philippe Turek, and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSymmetry of Annealed Wurtzite CdSe Nanocrystals: Assignment to the C3v Point GroupJ. J. Shiang, A. V. Kadavanich, R. K. Grubbs, and A. P. AlivisatosCite this: J. Phys. Chem. 1995, 99, 48, 17417–17422Publication Date (Print):November 1, 1995Publication History Published onlin…