28 items found

Types: publication Tags: Biochemistry Biotechnology Chemical Sciences not elsewhere classified Evolutionary Biology keywords.General Chemistry

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  • publication

    Generation and Characterization of Four Dilutions of Diesel Engine Exhaust fo...

    Exposure atmospheres for a rodent inhalation toxicology study were generated from the exhaust of a 2000 Cummins ISB 5.9L diesel engine coupled to a dynamometer and operated on a...
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    Dendrimer-Supported Oligothiophene Synthesis:  Aliphatic Ether Dendrimers in ...

    The first dendrimer-supported synthesis of oligothiophenes is reported. The dendrimer serves both as a solubilizing group and a “handle” to facilitate the iterative synthesis of...
  • publication

    Total Synthesis of the Ristocetin Aglycon

    The first total synthesis of the ristocetin aglycon is described employing a modular and highly convergent strategy. An effective 12-step (12% overall) synthesis of the ABCD...
  • publication

    Phase-Vanishing Reactions that Use Fluorous Media as a Phase Screen. Facile, ...

    In fluorous triphasic reactions, such as bromination of alkenes by dibromine and dealkylation of aromatic ethers by boron tribromide, the middle fluorous phase acts as a liquid...
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    Palladium-Catalyzed Aromatic C−H Halogenation with Hydrogen Halides by Means ...

    A new strategy for catalytic functionalization of C−H bonds by means of electrochemical oxidation is described. Combination of palladium-catalyzed aromatic C−H bond cleavage and...
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    Al-Containing Porous Titanium Dioxide Networks:  Sol−Gel Synthesis within Aga...

    Al-containing titania porous networks have been produced by conducting sol−gel chemistry within the porous structures of agarose gels. The use of the agarose template gives...
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    The Dark Side of Crystal Engineering:  Creating Glasses from Small Symmetric ...

    Glasses made from compounds of low molecular weight are useful materials with many attractive features, including well-defined compositions. At present, there are no reliable...
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    Rigid Oligonaphthalenediimide Rods as Transmembrane Anion−π Slides

    We report the design, synthesis, and evaluation of rigid oligonaphthalenediimide (O-NDI) rods that are expected to act as transmembrane anion−π slides. Studies in fluorogenic...
  • publication

    Digestion and Absorption of Ferulic Acid Sugar Esters in Rat Gastrointestinal...

    We estimated the absorption site and absorptivity of ferulic acid (FA) and its sugar esters, namely 5-O-feruloyl-l-arabinofuranose (FAA) and feruloyl−arabinoxylan (FAXn), in...
  • publication

    Debromination of Polybrominated Diphenyl Ethers by Nanoscale Zerovalent Iron:...

    The debromination of selected polybrominated diphenyl ethers (PBDEs) by nanoscale zerovalent iron particles (nZVI) was studied to investigate the degradation pathways and the...
  • publication

    Dual Memory of Enantiomeric Helices in a Polyacetylene Induced by a Single En...

    We report the dual memory of both the enantiomeric right- and left-handed helical conformations induced in a polyacetylene based on the temperature-stimulated helicity inversion...
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    Highly Enantioselective Hydrogenative Desymmetrization of Bicyclic Imides Lea...

    Highly enantioselective hydrogenative desymmetrization of bicyclic imides has been developed with chiral Cp*Ru(PN) catalysts. The present hydrogenation directly provides...
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    Defect-Site Promoted Surface Reorganization in Nanocrystalline Ceria for the ...

    Defect-site enriched nanocrystalline ceria prepared by an alcoholysis method favors oxidative dehydrogenation of ethylbenzene using nitrous oxide with high conversion and...
  • publication

    Planar Chiral Cyclic Ether:  Asymmetric Resolution and Chirality Transformation

    Remarkably stable planar chirality was found in a nine-membered diallylic cyclic ether. Enantiomerically enriched ether was prepared by a kinetic resolution of a racemic one,...
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    Chiral Brønsted Acid-Catalyzed Inverse Electron-Demand Aza Diels−Alder Reaction

    Inverse electron-demand aza Diels−Alder reaction of aldimine with enol ethers proceeded under the influence of a phosphoric acid diester, derived from (R)-BINOL, to give...
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    Generation of Chirality in Guest Aromatic Ketones Included in the Crystals of...

    Generation of Chirality in Guest Aromatic Ketones Included in the Crystals of Steroidal Bile Acids
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    Chiral Crown Ether Pillared Lamellar Lanthanide Phosphonates

    A new chiral bridging ligand, 2,2‘-pentaethylene glycol-1,1‘-binaphthyl-6,6‘-bis(phosphonic acid), was synthesized in 40.7% overall yield in five steps and used to generate...
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    Reactions of Strained Hydrocarbons with Alkene and Alkyne Metathesis Catalysts

    Here we describe the metathesis reactions of a strained eight-membered ring that contains both alkene and alkyne functionality. We find that the alkyne metathesis catalyst...
  • publication

    Facilitated transport of polychlorinated biphenyls and polybrominated dipheny...

    The exchange rate of hydrophobic organic chemicals between the aqueous phase and a sorbent (e.g., soil, organism, passive sampler) is relevant for distribution processes between...