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30.475 Aktuelle Fachpublikationen zum Thema temperature

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Sodium Aspartate as a Specific Enhancer of Salty Taste Perception—Sodium Aspartate Is a Possible Candidate to Decrease Excessive Intake of Dietary Salt

01.11.2014 | Tomohiro Nakagawa; Jun Kohori; Shin Koike; Yoshihisa Katsuragi; Takayuki Shoji, Chemical Senses, 2014

The excessive intake of dietary salt is a global issue in health. Attempts have been made to address this issue, including the development of salt substitutes. Yet, none of these substances are currently in wide use, because of their weak saltiness. The purpose of this study was to assess the ...

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Oxidative Addition of Dialkyldichalcogenanes to a Cyclic Bis(amino)germylene – Germane vs. Digermane Formation

21.10.2014 | Phillip Steiniger; Georg Bendt; Dieter Bläser; Christoph Wölper; Stephan Schulz, Chemical Communication, 2014

Chem. Commun., 2014, Accepted ManuscriptDOI: 10.1039/C4CC07921C, Communication Phillip Steiniger, Georg Bendt, Dieter Blaser, Christoph Wolper, Stephan SchulzThis is an Accepted Manuscript, which has been through the RSC Publishing peer review process and has been accepted for publication. ...

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Carbon quantum dots and their applications

21.10.2014 | Shi Ying Lim; Wei Shen; Zhiqiang Gao, Chemical Society Reviews, 2014

Fluorescent carbon nanoparticles or carbon quantum dots (CQDs) are a new class of carbon nanomaterials that have emerged recently and have garnered much interest as potential competitors to conventional semiconductor quantum dots. In addition to their comparable optical properties, CQDs have the ...

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Active site engineering in UiO-66 type metal–organic frameworks by intentional creation of defects: a theoretical rationalization

21.10.2014 | Matthias Vandichel; Julianna Hajek; Frederik Vermoortele; Michel Waroquier; Dirk E. De Vos; Veronique Van Speybroeck, CrystEngComm, 2014

The catalytic activity of the Zr-benzenedicarboxylate (Zr-BDC) UiO-66 can be drastically increased if some BDC linkers are missing, as this removes the full coordination of the framework metal ions. As a result, metal centers become more accessible and thus more active for Lewis acid catalysed ...

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Probing the role of an FeIV tetrazene in catalytic aziridination

21.10.2014 | S. Alan Cramer; Raúl Hernández Sánchez; Desirae F. Brakhage; David M. Jenkins, Chemical Communication, 2014

An iron(iv) tetrazene complex has been synthesized that is an important addition to a previously proposed catalytic aziridination cycle. It provides two key insights about the aziridination: an iron(iv) imide is formed and this imide can bind an additional ligand in the cis position.

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Evidence of Structural Variability among Synthetic and Biogenic Vaterite

21.10.2014 | Giuseppe Falini; Simona Fermani; Michela Reggi; Branka Njegić Džakula; Damir Kralj, Chemical Communication, 2014

Recently, the results of experimental and theoretical investigations have revealed that, in vaterite, two or even more crystalline structures coexist. In this communication we report evidence of diverse vaterite structures in biogenic samples of different origin. In addition, it is shown that the ...

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Palladium-Catalyzed Addition Reaction of Aroyl/Heteroaroyl Acid Anhydrides to Norbornenes

21.10.2014 | Mieko Arisawa; Saori Tanii; Masahiko Yamaguchi, Chemical Communication, 2014

A palladium complex derived from Pd2(dba)3 and dppp catalyzes the addition reaction of aroyl/heteroaroyl acid anhydrides to norbornenes, giving 2-aroyl/heteroaroyl-3-aroyloxy/heteroaroyloxy-bicyclo[2,2,1]heptanes. The C-O bond of acid anhydride is cleaved, and the aroyl/heteroaroyl and ...

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The effect of an ionic liquid on the rate of reaction at a phosphorus centre

21.10.2014 | Bradley J Butler; Jason B Harper, New Journal of Chemistry, 2014

The effect of the ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide on the ethanolysis of diethyl chlorophosphate was investigated. The addition of the salt increases the rate constant, though the extent of this increase was dependent on the mole fraction used and the ...

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Hydroarylations of Heterobicyclic Alkenes through Rhodium‐Catalyzed Directed CH Functionalizations of S‐Aryl Sulfoximines

20.10.2014 | Wanrong Dong, Kanniyappan Parthasarathy, Ying Cheng, Fangfang Pan, Carsten Bolm, Chemistry - A European Journal, 2014

Abstract Rhodium‐catalyzed directed CH‐functionalizations have been used in hydroarylations of heterobicyclic alkenes with NH‐sulfoximines. Unexpectedly, the bicyclic framework is retained, resulting in the formation of addition products being attractive intermediates for functionalized ...

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A Dehydratase Domain in Ambruticin Biosynthesis Displays Additional Activity as a Pyran‐Forming Cyclase

20.10.2014 | Gesche Berkhan, Frank Hahn, Angewandte Chemie International Edition, 2014

Abstract Hydropyran rings are a common structural motif in reduced polyketides. Information on their biosynthetic formation and particularly the biochemical characterization of the responsible enzymes has only been reported in few cases. The dehydratase domain AmbDH3 from the ambruticin ...

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