Results 221 to 230 of about 29,290 (260)
Some of the next articles are maybe not open access.
Percolation behaviors of model carbon black pastes
Soft Matter, 2018The percolation behaviors of a series of high-structured carbon black (CB) pastes (CB weight fractions 10–25 wt%, ethyl cellulose as the binder, α-terpineol as the solvent) were systematically investigated using analyses of rheology and impedance spectra together with characterization via ...
Jung-Shiun Jiang +3 more
openaire +2 more sources
Effect of Carbonation on Alkali‐Activated Slag Paste
Journal of the American Ceramic Society, 2006Carbonation on waterglass‐ and NaOH‐activated slag pastes was analyzed and compared with carbonation in Portland cement pastes to determine possible differences. Thermogravimetry‐differential thermal analysis (TG/DTA), Fourier‐transform infrared spectrometry, and nuclear magnetic resonance were used to ...
Palacios, Marta, Puertas, Francisca
openaire +2 more sources
Blue carbon from the past forecasts the future
Science, 2020Coastal mangrove ecosystems must rise above sea level to ...
openaire +5 more sources
Electrochemical response of oligonucleotides on carbon paste electrode
Bioelectrochemistry, 2007Electrochemical response of synthetic oligonucleotides with different DNA bases sequences was investigated to find relationships between a chain composition and a signal. All DNA mononucleotides present electroactivity at a carbon paste electrode yielding anodic peaks at potentials: 1.00 (GMP), 1.28 (AMP), 1.47 (TMP) and 1.53 V (CMP).
I, Stempkowska +4 more
openaire +2 more sources
Voltammetric determination of azithromycin at the carbon paste electrode
Talanta, 2004Azithromycin (AZ) is the first member of a class of macrolide azalides antibiotics called azolides. A simple and selective square-wave voltammetric (SWV) method has been developed for the determination of azithromycin in pure form, in pharmaceutical preparation and in biological samples.
Othman Abd El-Moaty, Farghaly +1 more
openaire +2 more sources
Chemically modified carbon paste and carbon composite electrodes
Electroanalysis, 1989AbstractCarbon paste electrodes and composite carbon electrodes modified by 20% silica gel (30 μm) within the electrode material exhibit many properties typical of a strand of carbon fiber microelectrodes in voltammetric measurements. Charged and uncharged species were studied on these electrodes; phenol, ferricyanide, and potassium ethylxanthogenate ...
Věra Stará, Miloslav Kopanica
openaire +1 more source
Changes in microstructure characteristics of cement paste on carbonation
Cement and Concrete Research, 2018Abstract This study investigates the influence of carbonation on the microstructure of cement paste cast with Ordinary Portland Cement (OPC), fly ash based Portland Pozzolana Cement (PPC) and Limestone Calcined Clay Cement (LC3) using X-ray diffraction (XRD), thermal analysis (TGA), scanning electron microscope (SEM) and mercury intrusion porosimeter
Shah, V +3 more
openaire +2 more sources
Acid Stability of Carbon Paste Enzyme Electrodes
Analytical Chemistry, 2006This note reports on the unusual protection of several enzymes against harsh pH conditions provided by carbon paste electrodes. Both glucose oxidase and polyphenol oxidase carbon paste amperometric biosensors display a remarkable resistance to acid deactivation compared to conventional biosensors prepared by electropolymeric entrapment of enzymes.
Joseph, Wang +2 more
openaire +2 more sources