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Keyword:'05-5870'
Showing 1-30 of 57 results for "

05-5870

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Bonil Koo et al.
Journal of the American Chemical Society, 131(9), 3134-3135 (2009-02-17)
The synthesis of monodisperse chalcopyrite (tetragonal) CuInSe(2) nanocrystals is reported. The nanocrystals have trigonal pyramidal shape, and they exhibited a common crystallographic orientation when drop-cast onto carbon substrates. A crystallographic model for the nanocrystals was developed. The nanocrystals are bounded
B Ceken et al.
Bioorganicheskaia khimiia, 34(4), 546-557 (2008-08-13)
We investigated the reactions of substituted aryl radicals and aryl cations derived from arenediazonium ions and their ability to cause cleavage of supercoiled DNA and their tendency toward free radical or cation formation in the presence and absent of copper
Derak J James et al.
ACS applied materials & interfaces, 7(42), 23623-23632 (2015-10-20)
Derivatives of synthetic tetrahedrite, Cu12Sb4S13, are receiving increasing attention in the thermoelectric community due to their exploitation of plentiful, relatively nontoxic elements, combined with a thermoelectric performance that rivals that of PbTe-based compounds. However, traditional synthetic methods require weeks of
Željka Vidaković-Cifrek et al.
Arhiv za higijenu rada i toksikologiju, 66(2), 141-152 (2015-06-26)
Metals have a variety of negative outcomes on plants, essential components of any ecosystem. The effects of CdCl2 (5 μmol L-1), ZnCl2 (25 or 50 μmol L-1), and CuCl2 (2.5 or 5 μmol L-1) and combinations of CdCl2 with either
Xiaoliang Xu et al.
Organic letters, 12(5), 897-899 (2010-02-04)
Promoted by CuCl/CCl(4), a variety of sulfonyl azides and tertiary amines were successfully coupled to give sulfonyl amidine derivatives in good to excellent yields. A possible mechanism for this reaction is discussed.
Nicolas Visez et al.
Chemosphere, 73(1 Suppl), S90-S93 (2008-04-29)
Chlorination and thermal degradation of 2-chlorodibenzodioxin and dibenzofuran were investigated using sealed tubes at 350 degrees C in the presence of CuCl(2) or CuCl. Twelve organic species, including polychlorobenzenes, were identified and quantified as a function of residence time. Time
Shih-Chen Hsu et al.
Small (Weinheim an der Bergstrasse, Germany), 11(2), 195-201 (2014-08-15)
Au-Cu2 O core-shell nanocubes, octahedra, and rhombic dodecahedra display facet-dependent optical properties. Furthermore, different-sized Au-Cu2 O octahedra with 58, 65, 68, and 73 nm octahedral gold cores clearly show a transition from the shell thickness-independent gold surface plasmon resonance band
Pan Dang et al.
Organic letters, 17(1), 34-37 (2014-12-17)
An efficient copper catalyzed strategy for the synthesis of a variety of benzothiazolethione derivatives has been developed. In the presence of CuCl, the three-component reaction of o-iodoanilines and K2S with p-toluenesulfonylmethyl isocyanide proceeded smoothly to obtain the corresponding benzothiazolethiones in
Shota Konno et al.
PloS one, 13(8), e0202816-e0202816 (2018-08-28)
As a frontier topic of soft condensed matter physics, irreversible aggregation has drawn attention for a better understanding of the complex behavior of biomaterials. In this study, we have described the synthesis of an artificial amphiphilic molecule, an alternating tetra-block-like
Michela Puddu et al.
Advanced healthcare materials, 4(9), 1332-1338 (2015-04-23)
As a consequence of the latest revolutionary discoveries on its functions, RNA is certainly the hottest topic at the moment, being an exceptional tool in biology as well as in medicine. For the various applications, a proper RNA storage is
Parthiban Ramasamy et al.
Chemistry, an Asian journal, 10(7), 1468-1473 (2015-05-02)
The first colloidal synthesis of Cu2 GeS3 (CGS) nanocrystals with a thermodynamically metastable wurtzite crystal phase is reported. As a benefit of the sulfur precursors used in the synthesis, the shape of the as-synthesized wurtzite CGS nanocrystals can be controlled
Nail Altunay et al.
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment, 32(9), 1475-1487 (2015-07-15)
A new ultrasonic-assisted cloud-point-extraction (UA-CPE) method was developed for the pre-concentration of Cu(II) in selected beverage and food samples prior to flame atomic absorption spectrometric (FAAS) analysis. For this purpose, Safranin T was used as an ion-pairing reagent based on
Takayoshi Arai et al.
The Journal of organic chemistry, 73(13), 4903-4906 (2008-06-03)
A catalytic asymmetric Henry reaction has been developed with use of a sulfonyldiamine-CuCl complex as a catalyst. A series of new binaphthyl-containing sulfonyldiamine ligands (2a-h) were readily synthesized in two steps starting from commercially available chiral 1,2-diamines. The (R,R)-diamine-(R)-binaphthyl ligand
Krassimira Yoncheva et al.
International journal of pharmaceutics, 490(1-2), 298-307 (2015-06-01)
The aim of the present study was to develop curcumin loaded cationic polymeric micelles and to evaluate their loading, preservation of curcumin antioxidant activity and intracellular uptake ability. The micelles were prepared from a triblock copolymer consisting of poly(ϵ-caprolactone) and
Si Yin Tee et al.
Nanoscale, 7(25), 11190-11198 (2015-06-11)
Herein, we report a facile two-step approach to produce gold-incorporated copper (Cu/Au) nanostructures through controlled disproportionation of the Cu(+)-oleylamine complex at 220 °C to form copper nanowires and the subsequent reaction with Au(3+) at different temperatures of 140, 220 and
Shuzhao Li et al.
Materials science & engineering. C, Materials for biological applications, 43, 350-358 (2014-09-02)
A water-soluble cationic diblock copolymer, CD-PAM-b-PMeDMA, was synthesized through atom transfer radical polymerization (ATRP) from a β-cyclodextrin (CD) macroinitiator with 10-active sites (10Br-β-CD). In order to reduce the cytotoxicity of the CD-PAM-b-PMeDMA, biocompatible polyacrylamide (PAM) was first introduced onto the
Milena E Miska et al.
Rapid communications in mass spectrometry : RCM, 29(24), 2341-2348 (2015-11-14)
The environmental occurrence of chlorinated acetic acids (CAAs) has been extensively studied, but the sources and transport are still not yet fully understood. A promising approach for source apportionment and process studies is the isotopic characterization of target compounds. We
Yin-Hua Shih et al.
Head & neck, 35(2), 250-256 (2012-03-01)
Lysyl oxidase (LOX) is a copper-dependent enzyme that cross-links collagen and elastin in the extracellular matrix. LOX overexpressed in various tumors. The manner in which LOX affects tumor growth remains controversial. Chemical treatment and gene transfection were used to induce
Moglan Simona et al.
Revista medico-chirurgicala a Societatii de Medici si Naturalisti din Iasi, 116(3), 914-919 (2013-01-01)
Enalapril is an angiotensin-converting enzyme inhibitor widely used in the treatment of hypertension and heart failure. To design and validate a simple and sensitive spectrophotometric method. This method is based on a ternary complex formation between enalapril, copper (II), and
František Surman et al.
Macromolecular bioscience, 15(5), 636-646 (2015-02-04)
In the current study, well-defined polymer brushes are shown as an effective surface modification to resist the adhesion of whole blood and its components. Poly[oligo(ethylene glycol)methylether methacrylate] (poly(MeOEGMA)), poly(hydroxyethyl methacrylate) (poly(HEMA)), poly[N-(2-hydroxypropyl) methacrylamide] (poly(HPMA)), and poly(carboxybetaine acrylamide) (poly(CBAA)) brushes were
Tatiana V Porto et al.
Dalton transactions (Cambridge, England : 2003), 44(46), 20176-20185 (2015-11-05)
The intricate interplay between polypeptide and metal ion binding underscores many of life's fundamental processes. Metalloregulators recognise and bind cognate metal ions during cellular metal stress, evoking a transcriptional response so as to maintain metal ion homeostasis. Members of the
Xiao-ying Yuan et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 75(2), 520-524 (2009-12-22)
To study the interaction between gatifloxacin (GT), metal ions (Cu(2+), Cd(2+), Co(2+), Mg(2+)) and calf thymus DNA under condition of physiology pH, UV absorption and fluorescence methods were adopted. Result shows that metal ions and DNA are able to react
Marie S T Morin et al.
The Journal of organic chemistry, 77(4), 2013-2017 (2012-01-31)
A copper-catalyzed Petasis-type reaction of imines, acid chlorides, and organoboranes to form α-substituted amides is described. This reaction does not require the use of activated imines or the transfer of special units from the organoboranes and represent a useful generalization
Qian Luo et al.
Chemical communications (Cambridge, England), (13)(13), 1593-1595 (2008-03-21)
Mediated by CuCl, 1,4-dilithio-1,3-dienes reacted with carbon monoxide (CO) to generate multi-substituted cyclopentadienones and/or their head-to-head dimers, via tandem CO insertion and intra/intermolecular cycloaddition of organocopper compounds.
Yan Xiao et al.
International journal of oncology, 37(1), 81-87 (2010-06-02)
The metal ion copper is a cofactor essential for maintaining normal biological and physical functions in human beings. High copper levels have been found in variety of tumor tissues and are involved in tumor angiogenesis processes. The ubiquitin-proteasome system plays
Yew-Foon Tan et al.
Journal of proteome research, 11(7), 3860-3879 (2012-05-12)
Plant mitochondria are highly responsive organelles that vary their metabolism in response to a wide range of chemical and environmental conditions. Quantitative proteomics studies have begun to allow the analysis of these large-scale protein changes in mitochondria. However studies of
Akira Mochizuki et al.
Journal of biomaterials science. Polymer edition, 26(12), 750-765 (2015-05-30)
The water structure and platelet compatibility of poly(methyl methacrylate (MMA)-block-2-hydroxyethyl methacrylate (HEMA)) were investigated. The molecular weight (Mn) of the polyHEMA segment was kept constant (average: 9600), while the Mn of the polyMMA segment was varied from 1340 to 7390.
Sung Hoon Ahn et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 15(9), 1841-1848 (2014-05-13)
A facile way of controlling the structure of TiO(2) by changing the amount of water to improve the efficiency of dye-sensitized solar cells (DSSCs) is reported. Hierarchically ordered TiO(2) films with high porosity and good interconnectivity are synthesized in a
Yanfei Hu et al.
International journal of pharmaceutics, 491(1-2), 152-161 (2015-06-23)
Thermo-responsive brush-like amphiphilic poly[2-(2-methoxyethoxy) ethyl methacrylate-co-oligo(ethylene glycol) methacrylate]-b-poly(l-lactide)-b-poly[2-(2-methoxyethoxy) ethyl methacrylate-co-oligo(ethylene glycol) methacrylate] [P(MEO2MA-co-OEGMA)-b-PLLA-b-P(MEO2MA-co-OEGMA)] triblock copolymers were synthesized by atom transfer radical polymerization of MEO2MA and OEGMA co-monomers using a α,ω-Bromopropionyl poly(l-lactide) (Br-PLLA-Br) macroinitiator. The resulting copolymers with MEO2MA/OEGMA molar ratio
Xiao Shen et al.
Nature communications, 5, 5431-5431 (2014-11-15)
The search for optimal thermoelectric materials aims for structures in which the crystalline order is disrupted to lower the thermal conductivity without degradation of the electron conductivity. Here we report the synthesis and characterisation of ternary nanoparticles (two cations and
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