نتایج جستجو برای: copper ions

تعداد نتایج: 213109  

Journal: :The Journal of biological chemistry 1966
G F Bryce R W Roeske R N Gurd

1. The association and ionization constants for nickel (II) and a selection of L-histidine-containing peptides have been computed together with the constants for copper (II) and acetylglycylglycyl-L-histidylglycine. 2. A close parallel between the titration behavior of copper (II) apomyoglobin complexes and model peptides has been obtained on the assumption that 1 of the 4 bound metal ions is s...

2015
Sarah Triboulet Catherine Aude-Garcia Lucie Armand Véronique Collin-Faure Mireille Chevallet Hélène Diemer Adèle Gerdil Fabienne Proamer Jean-Marc Strub Aurélie Habert Nathalie Herlin Alain Van Dorsselaer Marie Carrière Thierry Rabilloud

Titanium dioxide and copper oxide nanoparticles are more and more widely used because of their catalytic properties, of their light absorbing properties (titanium dioxide) or of their biocidal properties (copper oxide), increasing the risk of adverse health effects. In this frame, the responses of mouse macrophages were studied. Both proteomic and targeted analyses were performed to investigate...

Journal: :Applied and environmental microbiology 2011
Christophe Espírito Santo Ee Wen Lam Christian G Elowsky Davide Quaranta Dylan W Domaille Christopher J Chang Gregor Grass

Metallic copper surfaces rapidly and efficiently kill bacteria. Cells exposed to copper surfaces accumulated large amounts of copper ions, and this copper uptake was faster from dry copper than from moist copper. Cells suffered extensive membrane damage within minutes of exposure to dry copper. Further, cells removed from copper showed loss of cell integrity. Acute contact with metallic copper ...

2001
Craig Meyer

www.waterinfocenter.com The biocidal effects of copper and silver have been used for centuries. The early Greeks and Romans made water storage and drinking vessels out of these metals, and enough dissolved in the water stored in them to produce substantial disinfection. More recently, copper and silver ions have been used in hospital, recreational, drinking and industrial water systems. Unlike ...

Journal: :Materials science & engineering. C, Materials for biological applications 2013
Paul-Louis Fabre Laure Latapie Jérôme Launay Olivier Reynes Pierre Temple-Boyer

Effect of copper ions on the electrochemical behaviour of an alkylaminethiol monolayer has been studied by electrochemical impedance spectrosocpy. RAMAN experiment shows the effective adsorption of receptor onto the gold surfaces. The study of Nyquist plot shows that the gold/monolayer/electrolyte interface can be described by a serial combination of two R, CPE electrical circuits. In the prese...

Journal: :Journal of materials chemistry. B 2015
Murthi S Kandanapitiye Chamila Gunathilake Mietek Jaroniec Songping D Huang

High thiophillicicity of the Au-nanoparticle (Au NP) surface leads to covalent attachment of D-penicillamine molecules to Au NPs to form biocompatible D-penicillamine conjugated Au NPs. The latter are highly water-dispersible, exhibit no cytotoxicity, and can readily penetrate the cell membrane to target intracellular free copper ions for selective copper detoxification in the presence of the o...

Journal: :Dalton transactions 2009
Markus Tonigold Julia Hitzbleck Stefan Bahnmüller Gerhard Langstein Dirk Volkmer

The self-assembly of copper(II) ions and 5-(2-hydroxyethoxy)benzene-1,3-dicarboxylate (1) leads to Nanoballs in which twelve dinuclear copper(II) paddle-wheel units are interconnected via 24 ligands. The structure of the spherical coordination compound decorated with 24 hydroxy groups has been determined by single crystal X-ray structure analysis. As a model for the integration of Nanoballs int...

The efficiency of using a composite of carbon black and sodium bentonite in treating drinking water contaminated with lead and copper ions was analysed. The effects of pH, contact time, concentration and adsorbent dosage using an adsorbent composite of 20 % sodium bentonite and 80 % carbon black were studied. The adsorption data was tested with respect to Langmuir, Freundlich and Temkin iso...

2010
Min Feng Aria Yang Xu Zuo Carmine Vittoria Vincent G. Harris

The impact of cation distribution on electronic structure and magnetic properties is investigated by the first-principle calculation. The structure optimization is based on generalized gradient approximation GGA exchange-correlation and projector augmented wave method. The optimized structures of inverse and normal copper ferrite are tetragonal c /a=1.06 and cubic, respectively. The optimized s...

Journal: :The Journal of biological chemistry 1967
W T Shearer R A Bradshaw F R Gurd T Peters

1. The amino acid sequence of peptide (1-24) obtained from limited peptic digestion of bovine serum albumin has been determined from characterization of its tryptic and chymotryptic peptides. The 3 histidyl residues have been shown to occupy positions 3,9, and 18. 2. Hydrogen ion titration of this peptide with and without copper ions indicates that at neutral pH there are two copper(binding sit...

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