Jane V. Stark、Kenneth J. Klabunde1996-01-01Chemistry of Materials
Adsorption of HCl, HBr, NO and SO 3 on nanoscale MgO (autoclave prepared = AP-MgO) and microscale MgO (conventionally prepared = CP-MgO) has been studied. The higher surface area of AP-MgO allows a higher capacity of these gases to be adsorbed/mol MgO. However, at pressures of 100 Torr or higher, the amounts adsorbed/…
Catalytic Processes in Materials ScienceCatalysis and Oxidation ReactionsMagnesium Oxide Properties and Applications
Donald A. Tomalia1996-01-01Macromolecular Symposia
Abstract Construction of dendritic macromolecules based on the mimicry of macroscopic branching patterns found in trees is reviewed. From this mimicry, synthetic strategies have been developed for the preparation of precise macromolecular building blocks referred to as Starburstr̀/Cascade dendrimers. These dendrimer c…
Advanced Polymer Synthesis and CharacterizationDendrimers and Hyperbranched PolymersFerrocene Chemistry and Applications
M. Fischer、G. P. Hellmann1996-01-01Macromolecules
High-impact-modified polystyrene (HIPS) is made by thermal or radical polymerization of styrene containing dissolved polybutadiene (PB). The reaction leads, intermediately, to blends of yet ungrafted PB, of the homopolymer PS, and of graft copolymers PBgS varying in the number of PS grafts per PB chain. The polymeriza…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
William J. Landis1996-01-01Connective Tissue Research
This paper presents a general overview of calcification and involves aspects of the chemical, physical, and biological nature of mineral crystals in invertebrate and vertebrate tissues, with selected examples of the latter. Two broad areas are described: mineral structure and composition. Mineral formation is detailed…
Bone Tissue Engineering MaterialsBone health and osteoporosis researchCalcium Carbonate Crystallization and Inhibition
Feibo Xin、Michael T. Pope、Gary J. Long 等 4 位作者1996-01-01Inorganic Chemistry
Eight tris(organotin)-substituted Keggin tungstosilicate heteropolyanions have been synthesized and characterized by elemental analysis, infrared and Mössbauer spectroscopy, multinuclear NMR, and X-ray crystallography. The new anions contain alpha- or beta-SiW(9)O(34)(10)(-) moieties and are of two structural types, […
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsVanadium and Halogenation Chemistry
Charles Michael Drain、Christine Kirmaier、Craig J. Medforth 等 6 位作者1996-01-01The Journal of Physical Chemistry
Transient absorption measurements with subpicosecond resolution have been performed on nickel(II) dodecaphenylporphyrin (NiDPP), a highly nonplanar tetrapyrrole. Following photoexcitation, NiDPP deactivates by the pathway (π,π*) → (d,d) → ground state, the route proposed previously for planar analogues. However, the (…
Porphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer StudiesMetal-Catalyzed Oxygenation Mechanisms
Helge A. Reisch、Uwe M. Wiesler、Ullrich Scherf 等 4 位作者1996-01-01Macromolecules
This communication describes the synthesis of a novel low band gap hydrocarbon polymer, poly(indenofluorene), PIF, composed of 3,9-di- tert -butylindeno[1,2- b ]fluorene building blocks. The polymer, with high degrees of polymerization (DP > 20), was generated by coupling alkylated 6,6,12,12-tetrachloro-6,12-dihydroin…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsLuminescence and Fluorescent Materials
Z. C. Kang、Zhong Lin Wang1996-01-01The Journal of Physical Chemistry
In this paper, the high chemical activity of the newly synthesized nanosize carbon spheres is demonstrated. The carbon spheres can be accreted by a treatment in acetone. The mechanism for the accretion is attributed to the combination of the hydrogen and oxygen atoms belonging to the acetone molecules with the adsorbe…
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications
作者信息未提供1996-01-01Water Science & Technology
Hydrotalcite-like compounds (HTLCs), which are also called anionic clay minerals or Layered Double Hydroxides (LDHs), can be formulated by M(II) 1−x M(III) X (OH) 2 (A n− ) X/n yH 2 O. This chemical, which has anoin exchange capacity, could be an alternative chemical for phosphorus removal. The phosphate uptake by HTL…
Layered Double Hydroxides Synthesis and ApplicationsPhosphorus and nutrient management
T. H. Hou、B. J. Jensen、P. M. Hergenrother1996-01-01Journal of Composite Materials
A phenylethynyl terminated imide (PETI) oligomer from the reaction of 3,3',4,4'-biphenyltetracarboxylic dianhydride, an 85:15 molar ratio of 3,4'-oxydianiline and 1,3-bis(3-aminophenoxy)benzene and 4-phenylethynylphthalic anhydride as the end-capper at a theoretical number average molecular weight (Mn) of - 5,000 g/mo…
Epoxy Resin Curing ProcessesSynthesis and properties of polymersTribology and Wear Analysis
Catherine Branger、M. Lequan、Rose Marie Lequan 等 5 位作者1996-01-01Journal of Materials Chemistry
New molecules with dimesitylboron as the acceptor group and bithiophene as the unsaturated chain have been synthesized and their non-linear optical properties investigated. The theoretical first hyperpolarizabilities determined by calculations are compared with experimental results.
Nonlinear Optical Materials ResearchPhotochromic and Fluorescence ChemistrySolid-state spectroscopy and crystallography
Naoto Koike、Hidehiro Uekusa、Yuji Ohashi 等 7 位作者1996-01-01Inorganic Chemistry
Four crystal structures of the title complexes have been analyzed by X-ray crystallography. 1: C 80 H 68 N 17 Nd, a = 17.0545(6) Å, c = 22.807(3) Å, tetragonal, P 4/ ncc, Z = 4. 2: C 80 H 68 N 17 Gd, a = 17.399(8) Å, c = 11.377(6) Å, tetragonal, P 42 1 2, Z = 2. 3: C 80 H 70 N 17 OHo, a = 18.096(5) Å, c = 11.079(6) Å,…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryLanthanide and Transition Metal Complexes
Alex De Visscher、Peter Van Eenoo、David Drijvers 等 4 位作者1996-01-01The Journal of Physical Chemistry
The breakdown of benzene, ethylbenzene, styrene, and o -chlorotoluene in aqueous solution by 520 kHz ultrasonic waves was studied at various initial concentrations in the millimolar range. First-order reaction rates depend upon both initial concentration and sonication time. These variations can be explained by a mode…
Ultrasound and Hyperthermia ApplicationsUltrasound and Cavitation PhenomenaThermal and Kinetic Analysis
Paul O’Brien、Tahir Saeed、Jonathan C. Knowles1996-01-01Journal of Materials Chemistry
Thin films of monophasic crystalline hexagonal ZnO were deposited from solutions of zinc acetate in presence of ethane-1,2-diamine and sodium hydroxide onto glass microscope slides and tin oxide coated glass. At least two distinct morphologies of ZnO were observed, depending on the deposition conditions, by scanning e…
ZnO doping and propertiesQuantum Dots Synthesis And PropertiesCopper-based nanomaterials and applications
Krishna Kumar、Zhe Lin、David H. Waldeck 等 4 位作者1996-01-01Journal of the American Chemical Society
Electron transfer (eT) rate constants are determined, in part, by the magnitude of donor (D)/acceptor (A) electronic coupling, {vert_bar}V{vert_bar}. When the D and A are separated beyond van der Waals contact, the intervening medium may mediate {vert_bar}V{vert_bar}. Herein, we report (1) electronic coupling mediated…
Porphyrin and Phthalocyanine ChemistryMolecular Junctions and NanostructuresLuminescence and Fluorescent Materials
G. Wrobel、Carole Lamonier、Abdelrhani Bennani 等 5 位作者1996-01-01Journal of the Chemical Society Faraday Transactions
Interaction of hydrogen with a series of mixed oxides CeMx(M = Cu, Ni; 0 < x⩽ 5) precursors of catalysts for hydrogenation reactions has been studied in the 300–1073 K temperature range. In situ XRD, XPS, EPR and thermogravimetric techniques have been used to characterize the processes occurring during the hydrogen tr…
Catalytic Processes in Materials ScienceHydrogen Storage and MaterialsCatalysis and Hydrodesulfurization Studies
Susan L. Schafer、William C. Barrett、Abraham T. Kallarakal 等 9 位作者1996-01-01Biochemistry
On the basis of the available high-resolution structures of mandelate racemase (MR) from Pseudomonas putida [Landro, J.A., Gerlt, J.A., Kozarich, J.W., Koo, C.W., Shah, V.J., Kenyon, G.L., Neidhart, D.J., Fujita, J., & Petsko, G.A. (1994) Biochemistry 33, 635-643], Lys 166 and His 297 are positioned appropriately to p…
Protein Structure and DynamicsMicrobial Metabolic Engineering and BioproductionEnzyme Structure and Function
Steven H. Bertz、Magnus Eriksson、Guobin Miao 等 4 位作者1996-01-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTβ-Silyl Organocuprates: The Grail of Organocuprate Chemistry?1aSteven H. Bertz, Magnus Eriksson, Guobin Miao, and James P. SnyderView Author Information Complexity Study Center Mendham, New Jersey 07945 Department of Organic Chemistry Chalmers University of Technology…
Organometallic Complex Synthesis and CatalysisMesoporous Materials and CatalysisSynthesis and characterization of novel inorganic/organometallic compounds
Shiliang He、Amy T. Kan、Mason B. Tomson1996-01-01Langmuir
A semiempirical mathematical model has been developed to predict inhibitor efficiency for barium sulfate scale control in industrial processes. This model can be used for selecting effective inhibitors and determining the minimal effective concentration needed for a given system. The model incorporates experimental da…
Calcium Carbonate Crystallization and InhibitionMinerals Flotation and Separation TechniquesCrystallization and Solubility Studies
Michael A. Sinev、Elena V. Sineva、Varda Ittah 等 4 位作者1996-01-01Biochemistry
The method of time-resolved dynamic nonradiative excitation energy transfer (ET) was used to analyze the proposed domain closure in adenylate kinase (AK). A highly active mutant of Escherichia coli AK, (C77S, V169W, A55C)-AK, was prepared, in which the solvent- accessible residues valine 169 and alanine 55 were replac…
Protein Kinase Regulation and GTPase SignalingMicrotubule and mitosis dynamicsEnzyme Structure and Function