Results 211 to 220 of about 29,290 (260)
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Biocatalytic Carbon Paste Sensors Based on a Mediator Pasting Liquid
Analytical Chemistry, 2004The preparation and advantages of a new generation of carbon paste enzyme electrodes where the redox mediator acts also as the pasting liquid are described. The mediator pasting liquid concept is illustrated for amperometric biosensing of glucose in connection with either the tert-pentylferrocene or n-butylferrocene mediator/binder along with the ...
Nathan S, Lawrence +2 more
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Activated carbon paste electrodes for biosensors
Analytical Chemistry, 1994A reagentless amperometric glucose biosensor was constructed using glucose oxidase and hydroquinone (H2Q) coimmobilized in carbon paste. The sensor response was studied by amperometry and cyclic voltammetry in quiescent solutions, as well as in a flow injection apparatus.
N, Motta, A R, Guadalupe
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Determination of Roxarsone Using Carbon Paste and Amberlite LA2 Modified Carbon Paste Electrodes
Electroanalysis, 2000The methods for determination of the growth promoter 4-hydroxy-3-nitrobenzenearsonic acid (Roxarsone) in veterinary product and in poultry drinks have been developed using differential pulse voltammetry with carbon paste and Amberlite LA2 chemically modified carbon paste electrodes.
Rahmalan Ahamad +4 more
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Voltammetric study of glibenclamide at carbon paste and Sephadex-modified carbon paste electrodes
Analytical and Bioanalytical Chemistry, 2004The oxidative behaviour of the antidiabetic agent glibenclamide on a bare carbon paste electrode (CPE) and a Sephadex-modified carbon paste electrode (SMCPE) was explored by cyclic and differential pulse voltammetry (DPV). The analysis procedure consisted of an open circuit accumulation step in stirred sample solution of Britton-Robinson buffer (0.04 ...
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Smart cement paste with carbon nanotubes
2016Carbon nanotubes can be added to cementitious materials to create a multifunctional nanocomposite with excellent piezoresistive and strain-sensing properties. The use of carbon nanotubes provides high strain sensitivity and signal-to-noise ratio, which are ideal for fabricating self-sensing nanocomposite cement paste for applications to structural ...
UBERTINI, Filippo +2 more
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The carbonation of hardened cement pastes
Advances in Cement Research, 1990The microstructure of hardened pastes of C3S and a C3S/silica fume blend have been examined by transmission electron microscopy before and after partial carbonation in pure CO2 at a relative humidity of 72·6%. Fibrillar outer product C-S-H and the outer regions of inner product C-S-H gel carbonate without change of morphology to silica gel.
G. W. Groves +2 more
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Collection of Czechoslovak Chemical Communications, 2000
In order to obtain modified electrodes with phenothiazines and to develop electrochemical methods for their determination in pharmaceutical formulations, promazine maleate, promethazine maleate and levomepromazine, were studied by linear sweep voltammetry using different types of working electrodes: carbon paste, solid carbon paste and glass-like ...
Robert V. Sandulescu +3 more
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In order to obtain modified electrodes with phenothiazines and to develop electrochemical methods for their determination in pharmaceutical formulations, promazine maleate, promethazine maleate and levomepromazine, were studied by linear sweep voltammetry using different types of working electrodes: carbon paste, solid carbon paste and glass-like ...
Robert V. Sandulescu +3 more
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CARBON DIOXIDE IN THE GEOLOGICAL PAST
2023AbstractWe trace CO2 concentrations through geological time. After the core and the crust were formed, 4.5 billion years ago (Gyr), Earth started to develop an atmosphere. An atmosphere that consisted of the exhaust gases from the interior: water vapour, nitrogen, and carbon dioxide.
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Carbon Nanotube Purification: Preparation and Characterization of Carbon Nanotube Paste Electrodes
Analytical Chemistry, 2003Paste electrodes have been constructed using single-wall carbon nanotubes mixed with mineral oil. The electrochemical behavior of such electrodes prepared with different percentages of carbon nanotubes has been compared with that of graphite paste electrodes and evaluated with respect to the electrochemistry of ferricyanide with cyclic voltammetry ...
Valentini F +4 more
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On the past and present of carbon nanostructures
physica status solidi (b), 2011AbstractA personal review is presented on 50 years of my research experiences in working on research on carbon science and carbon‐based nanostructures. The text is based on a talk given in Warsaw, Poland, on this topic, presented at a meeting of the European Materials Research Society in September 2010.
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