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4.672 Aktuelle Fachpublikationen zum Thema temperature

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Can A Denaturant Stabilize DNA? Pyridine Reverses DNA Denaturation in Acidic pH

24.07.2015 | Guillem Portella, Montserrat Terrazas, Núria Villegas, Carlos González, Modesto Orozco, Angewandte Chemie International Edition, 2015

Abstract The stability of DNA is highly dependent on the properties of the surrounding solvent, such as ionic strength, pH, and the presence of denaturants and osmolytes. Addition of pyridine is known to unfold DNA by replacing π–π stacking interactions between bases, stabilizing conformations ...


The chemical behavior of terminally tert-butylated polyolefins

24.07.2015 | Dagmar Klein, Henning Hopf, Peter G. Jones, Ina Dix and Ralf Hänel, Beilstein Journal of Organic Chemistry, 2015

Abstract The chemical behavior of various oligoenes 2 has been studied. The catalytic hydrogenation of diene 3 yielded monoene 4. Triene 7 was hydrogenated to diene 8, monoene 9 and saturated hydrocarbon 10. Bromine addition to 3 and 7 yielded the dibromides 17 and 18, respectively, i.e., the ...


Cyclometalation of Phenylpyridines by Rhodium(I) via Room‐temperature C–H Bond Activation

24.07.2015 | Hans‐Christian Böttcher, Marion Graf, Peter Mayer, Zeitschrift für anorganische und allgemeine Chemie, 2015

Abstract A convenient synthesis of cyclometalated complexes [{Rh(μ‐Cl)(C N)2}2] [C N = ppy, 2‐phenylpyridinato (2); C N = ptpy, 2‐(p‐tolyl)pyridinato (3); 4‐Clppy = 4‐chloro‐2‐phenylpyridinato (4)] at room temperature is described. The compounds were obtained by the oxidative addition ...


Integrating expanders into heat exchanger networks above ambient temperature

24.07.2015 | Chao Fu, Truls Gundersen, AIChE Journal, 2015

Abstract The integration of expanders into heat exchanger networks (HENs) is a complex task since both heat and work are involved. In addition, the role of streams (as hot or cold), the utility demand, and the location of pinch points may change. With certain well‐defined conditions, four ...


Cytocompatible Fluorescent Quantum Dot/PEG‐Chitosan Bioconjugates for Nanomedicine Applications

23.07.2015 | Alexandra A. P. Mansur, Camila G. de Almeida, Sandhra M. de Carvalho, Lucas V. de Faria, Mauro V. de Almeida, Herman ..., European Journal of Inorganic Chemistry, 2015

Abstract In this study, novel nanobioconjugates based on quantum dots and a PEGylated chitosan derivative (PEG‐CHI) have been designed and synthesised by a single‐step aqueous route at room temperature. Chitosan was chemically modified by PEGylation aiming to significantly improve its water ...


Effects of glass fiber on the properties of polyoxymethylene/thermoplastic polyurethane/multiwalled carbon nanotube composites

22.07.2015 | Bo‐Yuan Zhang, Ling Xu, Zhao‐Xia Guo, Jian Yu, Satoshi Nagai, Polymer Composites, 2015

The effects of epoxy‐functionalized glass fiber (GF) on the electrical conductivity, crystallization behavior, thermal stability, and dynamic mechanical properties of polyoxymethylene (POM)/thermoplastic polyurethane (TPU)/multiwalled carbon nanotube (MWCNT) composites are investigated. The ...


Materials, Vol. 8, Pages 4593-4607: Engineering of Iron-Based Magnetic Activated Carbon Fabrics for Environmental Remediation

22.07.2015 | Haham, Hai ; Grinblat, Judith ; Sougrati, Moulay-Tahar ; Stievano, Lorenzo ; Margel, Shlomo, Materials, 2015

Magnetic Fe3O4, Fe and Fe/Pd nanoparticles embedded within the pores of activated carbon fabrics (ACF) were prepared by impregnation of the ACF in iron acetylacetanoate (Fe(acac)3) ethanol solution, followed by thermal decomposition of the embedded iron precursor at 200, 400 and 600 °C in an ...


Phase Separation and Crystallization in High Hard Block Content Polyurethane Thin Films

22.07.2015 | Long Jiang; Jia Wu; Chinemelum Nedolisa; Alberto Saiani; Hazel E. Assender, Macromolecules, 2015

Following studies of bulk behavior, the morphological evolution in thin films of linear TPUs with a high content of hard segment (HS) (from 70 to 100 wt %) on annealing is investigated. In contrast to melt-quenched bulk samples, a mixed phase was obtained for as-spin-cast films, and then, on ...


Solubility of Amorphous Clopidogrel Hydrogen Sulfate in Different Pure Solvents

22.07.2015 | Yan Liu; Zhi-Peng Zhao; Jingbin Cui; Guobin Ren, Journal of Chemical & Engineering Data, 2015

At the temperature range (273.15 to 308.15) K, the solubility of amorphous clopidogrel hydrogen sulfate (CHS) in pure 1-butanol, 2-butanol, 2-propanol, methyl acetate, ethyl acetate, acetone, and methyl tert-butyl ether (MTBE) were experimentally measured. The order of solubility of amorphous CHS ...


N-Heterocyclic Carbene-Palladium(II)-1-Methylimidazole Complex Catalyzed -Arylation Reactions of Tetralones with Aryl Chlorides and Further Transformation of the Products

21.07.2015 | Hui-Ying Yin; Xia-Li Lin; Shu-Wan Li; Li-Xiong Shao, Organic & Biomolecular Chemistry, 2015

NHC-Pd(II)-Im complex 1 have proven an efficient catalyst in the reaction between tetralones 2 and aryl chlorides 3, giving the alfa-arylated tetralones 4 in good to high yields. In addition, if the above reaction mixture was exposed to air at room temperature for another 3 h, the normal ...


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