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56.633 Aktuelle Fachpublikationen zum Thema temperature

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Cationic Pd(II)-catalyzed C–H activation/cross-coupling reactions at room temperature: synthetic and mechanistic studies

20.05.2016 | Takashi Nishikata, Alexander R. Abela, Shenlin Huang and Bruce H. Lipshutz, Beilstein Journal of Organic Chemistry, 2016

Abstract Cationic palladium(II) complexes have been found to be highly reactive towards aromatic C–H activation of arylureas at room temperature. A commercially available catalyst [Pd(MeCN)4](BF4)2 or a nitrile-free cationic palladium(II) complex generated in situ from the reaction of Pd(OAc)2 ...

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Comparing three stochastic search algorithms for computational protein design: Monte Carlo, replica exchange Monte Carlo, and a multistart, steepest‐descent heuristic

20.05.2016 | David Mignon, Thomas Simonson, Journal of Computational Chemistry, 2016

Computational protein design depends on an energy function and an algorithm to search the sequence/conformation space. We compare three stochastic search algorithms: a heuristic, Monte Carlo (MC), and a Replica Exchange Monte Carlo method (REMC). The heuristic performs a steepest‐descent ...

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Non‐monotonic molecular weight dependence of crystallization rates of linear and cyclic poly(epsilon‐caprolactone)s in a wide temperature range

20.05.2016 | Zhaolei Li, Jing Wang, Ricardo A. Pérez‐Camargo, Alejandro J. Müller, Boyu Zhang, Scott M. Grayson, Wenbing Hu, Polymer International, 2016

Abstract By using a commercial fast‐scan chip‐calorimeter, the effect of molecular weight on the isothermal crystallization rates of linear and cyclic poly(epsilon‐caprolactone) samples (PCLs) are investigated. The results confirmed the non‐monotonic molecular weight dependence of the ...

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Preparation of poly(vinylalcohol)/poly(acrylamide‐co‐vinyl imidazole)/γ‐Fe2O3 semi‐IPN nanocomposite and their application for removal of heavy metal ions from water

20.05.2016 | Zahra Sekhavat Pour, Mousa Ghaemy, Polymers for Advanced Technologies, 2016

A series of magnetic semi‐interpenetrating polymer network (semi‐IPN) hydrogels was prepared in one‐stage strategy composed of linear poly(vinyl alcohol) (PVA) chains and magnetic γ‐Fe2O3 nanoparticles entrapped within the cross‐linked poly(acrylamide‐co‐vinylimidazole) (poly(AAm‐co‐VI)) ...

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Generation of Aspherical Optical Lenses via Arrested Spreading and Pinching of a Cross-Linkable Liquid

20.05.2016 | Abhijit Chandra Roy; Mridul Yadav; Edward Peter Arul; Anubhav Khanna; Animangsu Ghatak, Langmuir, 2016

Aspherical optical lenses with spatially varying curvature are desired for capturing high quality, aberration free images in numerous optical applications. Conventionally such lenses are prepared by multistep top-down processes which are expensive, time-consuming, and prone to high failure rate. ...

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IJMS, Vol. 17, Pages 764: Development of Therapeutic Chimeric Uricase by Exon Replacement/Restoration and Site-Directed Mutagenesis

20.05.2016 | Xie, Guangrong ; Yang, Weizhen ; Chen, Jing ; Li, Miaomiao ; Jiang, Nan ; Zhao, Baixue ; Chen, Si ; Wang, Min ; Chen ..., International Journal of Molecular Sciences, 2016

The activity of urate oxidase was lost during hominoid evolution, resulting in high susceptibility to hyperuricemia and gout in humans. In order to develop a more “human-like” uricase for therapeutic use, exon replacement/restoration and site-directed mutagenesis were performed to obtain ...

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Acid-Induced Room Temperature RAFT Polymerization: Synthesis and Mechanistic Insights

20.05.2016 | Joke Vandenbergh; Bertrand Schweitzer-Chaput; Martin Klussmann; Thomas Junkers, Macromolecules, 2016

An acid-induced cyclohexanone/tert-butylhydroperoxide initiation system for ambient temperature reversible addition–fragmentation transfer (RAFT) polymerization of vinyl monomers is presented. The reaction system is optimized for the synthesis of poly(n-butyl acrylate) of various chain length. ...

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Molecular Ecological Insights into Neotropical Bird–Tick Interactions

20.05.2016 | Matthew J. Miller; Helen J. Esser; Jose R. Loaiza; Edward Allen Herre; Celestino Aguilar; Diomedes Quintero; Eric Al ..., PLoS ONE, 2016

by Matthew J. Miller, Helen J. Esser, Jose R. Loaiza, Edward Allen Herre, Celestino Aguilar, Diomedes Quintero, Eric Alvarez, Eldredge Bermingham In the tropics, ticks parasitize many classes of vertebrate hosts. However, because many tropical tick species are only identifiable in the adult ...

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[Report] Ubiquitous signatures of nematic quantum criticality in optimally doped Fe-based superconductors

20.05.2016 | Hsueh-Hui Kuo; Jiun-Haw Chu; Johanna C. Palmstrom; Steven A. Kivelson; Ian R. Fisher, Science , 2016

A key actor in the conventional theory of superconductivity is the induced interaction between electrons mediated by the exchange of virtual collective fluctuations (phonons in the case of conventional s-wave superconductors). Other collective modes that can play the same role, especially spin ...

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[Report] Rewritable artificial magnetic charge ice

20.05.2016 | Yong-Lei Wang; Zhi-Li Xiao; Alexey Snezhko; Jing Xu; Leonidas E. Ocola; Ralu Divan; John E. Pearson; George W. Crabt ..., Science , 2016

Artificial ices enable the study of geometrical frustration by design and through direct observation. However, it has proven difficult to achieve tailored long-range ordering of their diverse configurations, limiting both fundamental and applied research directions. We designed an artificial spin ...

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