搜索结果: 16-30 共查到“理学 copper”相关记录141条 . 查询时间(0.12 秒)
Proposal of an Amide-Directed Carbocupration Mechanism for Copper-Catalyzed meta-Selective C-H Arylation of Acetanilides by Diaryliodonium Salts
C bond activation Carbocupration Copper catalysis Density functional theory Selectivity
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2012/4/5
We examined the puzzling mechanism for Cu-catalyzed meta-C-H arylation reaction of anilides by diaryliodonium salts through systematic theoretical analysis. The previously proposed anti-oxy-cupration ...
A copper negative index metamaterial in the visible / near-infrared
copper negative index visible near-infrared Optics
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2011/8/11
Abstract: We propose a design for a novel plasmonic copper metamaterial with an index of refraction equal to -1 at an operating wavelength of 700 nm. Using numerical simulations, we demonstrate negati...
Numerical simulation of copper ablation by ultrashort laser pulses
Numerical simulation copper ablation ultrashort laser pulses
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2011/8/5
Abstract: Using a modified self-consistent one-dimensional hydrodynamic lagrangian fluid code, laser ablation of solid copper by ultrashort laser pulses in vacuum was simulated to study fundamental me...
Tribological Properties and Self-Repairing Effect of Palygorskite /Copper Nanocomposites as Lubricating Oil Additive
Nano Composite Nano-Copper Nano-Palygorskite Self-Repairing Film Wear
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2011/11/14
Palygorskite/copper nanocomposites were prepared in order to study the friction behaviour and self-repairing effect of HT200 tribopair. The friction and wear behaviors of the lubricant oil containing ...
The Effects of Copper Supplementation on the Performance and Hematological Parameters of Broiler Chickens
Copper Haemoglobin Blood Parameters Feed Intake Broiler Chicken
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2016/5/6
To determine the efficiency of copper (Cu) supplementation, a feeding experiment was carried out with 240 day old broiler chicks (vencobb-100). Birds were divided into four dietary treatments: i) C - ...
Determination of stability constants of 5-(2-hydroxybenzylidene)-2-thioxodihydropyrimidine-4,6(1H,5H)-dione with copper(II) and mercury(II) ions
Cu(II) and Hg(II) complexes 5-(2-hydroxybenzylidene)-2-thioxodihydropyrimidine-4,6(1H,5H)-dione spectrophotometry
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2011/4/6
In this work, a hard model chemometric method was used to determine the stability constants of copper(II) and mercury(II) complexes with the newly synthesized ligand 5-(2-hydroxybenzylidene)- 2-thioxo...
Stability study of passive film on copper surface as a function of anodic potential
Electrochemical impedance spectroscopy model circuits copper surface passive film transition stage interfaces diffusion coefficient
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2011/4/6
Results for passive film formation and breakdown on copper disk electrodes in buffer solutions, pH 9.2 and 8.5, were reported earlier. The present studies were carried out in a buffer solution, pH 8.0...
Controlled growth of two-dimensional copper nanoplates in graphite gallery
Carbon-encapsulated nanostructures electron microscopy Raman spectroscopy X-ray diffraction
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2011/4/6
Copper nanoplates embedded in a graphite gallery were obtained by in situ reduction of stage 1, stage 2, and stage 3 CuCl2-graphite intercalation compound precursors. The characterization results indi...
"Instantaneous superluminality" in a bimetallic wire consisting of a superconducting aluminum wire plated with a thick copper covering
"Instantaneous superluminality" bimetallic wire consisting superconducting aluminum wire plated thick copper covering
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2010/12/20
We shall analyze here the transmission of microwave-frequency electrical pulses through a \bimetallic" wire consisting of superconducting aluminum (Al) wire covered with a thick, nonsuperconducting co...
Electrochemical impedance spectroscopic studies of the passive layer on the surface of copper as a function of potential
cyclic voltammetry passive film interfaces
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2010/12/3
Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were used to investigate the oxide layer formed on a copper disc electrode and the changes that took place when treated potenti...
Solid phase extraction of copper, nickel, and cobalt in water samples after extraction using surfactant coated alumina modified with indane-1,2,3-trione 1,2-dioxime and determination by flame atomic absorption spectrometry
Solid phase extraction surfactant coated alumina atomic absorption spectrometry
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2010/12/3
A simple method for simultaneous pre-concentration of Cu, Ni, and Co metal ions prior to their determination by flame atomic absorption spectrometry is reported. The method is based on the extraction ...
Synthesis and crystal structure of a novel multimodal ligand, 6,6'-bis(2-(di(pyridin-2-yl)methylene)-1-methylhydrazinyl)-2,2'-bipyridine, and its copper(I) complex, {[Cu3L2](PF6)3° 3H2O} (1)
dipyridyl ketone metal complexes N-donor ligands
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2010/12/3
The single crystal X-ray structure of the novel multimodal ligand 6,6'-bis(2-(di(pyridin-2-yl)methylene)-1-methylhydrazinyl)-2,2'-bipyridine, C34H28N10 (L), was determined at 120 (2) K. The ligand pos...
Electrochemical Impedance Spectroscopic Studies of Passive Layer on Copper Surface as a Function of Potential.
Copper electrochemical impedance spectroscopy cyclic voltammetry
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2010/10/19
Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were used to investigate the oxide layer formed on a copper disc electrode and the changes that took place when treated potenti...
'Solid phase extraction of Copper, Nickel and Cobalt in water samples after extraction using surfactant Coated alumina modified with Indane-1,2,3-trione 1,2-dioxime and determination by flame atomic absorption
Solid phase extraction surfactant coated alumina atomic absorption spectrometry
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2010/10/19
A simple method for simultaneous pre-concentration of Cu, Ni, and Co metal ions prior to their determination by flame atomic absorption spectrometry is reported. The method is based on the extraction ...
Synthesis and crystal structure of a novel multimodal ligand, 6,6'-bis(2-(di(pyridin-2-yl)methylene)-1-methylhydrazinyl)-2,2'-bipyridine and its copper(I) complex, {[Cu3L2](PF6)3?3H2O} (1)
Bipyridine derivatives hydrazone dipyridyl ketone metal complexes
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2010/10/19
The single crystal X-ray structure of the novel multimodal ligand 6,6’-bis(2-(di(pyridin-2-yl)methylene)-1-methylhydrazinyl)-2,2’-bipyridine, C34H28N10 (L), was determined at 120 (2) K. The ligand pos...