Topic
Buffer solution
About: Buffer solution is a research topic. Over the lifetime, 6948 publications have been published within this topic receiving 112440 citations. The topic is also known as: pH buffer & buffer.
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TL;DR: In this article, the Tafel analyses of the cyclic voltammograms (CVs) of the electrocatalytic reaction of the GOx and β-d-glucose were performed on rotating Pt disc electrodes (RDEs).
36 citations
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TL;DR: New intravenous conjugates of amphotericin B with poly(ethylene glycols) (PEG) (M=5000, 10,000, 20,000) have been synthesized and characterised and can be presumed to exhibit antimycotic effect at sites with lowered pH value.
36 citations
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TL;DR: In this paper, a super-active and robust Cu-CuxO-Pt nanoparticulate electrocatalyst is reported, which displays a small Tafel slope (44 mV dec-1) and a large exchange current density (1.601 mA cm-2) in neutral buffer solution.
Abstract: Electrocatalysts that are stable and highly active at low overpotential (η) under mild conditions as well as cost-effective and scalable are eagerly desired for potential use in photo- and electro-driven hydrogen evolution devices. Here the fabrication and characterization of a super-active and robust Cu-CuxO-Pt nanoparticulate electrocatalyst is reported, which displays a small Tafel slope (44 mV dec-1) and a large exchange current density (1.601 mA cm-2) in neutral buffer solution. The catalytic current density of this catalyst film reaches 500 mA cm-2 at η = -390 ± 12 mV and 20 mA cm-2 at η = -45 ± 3 mV, which are significantly higher than the values displayed by Pt foil and Pt/C electrodes in neutral buffer solution and even comparable with the activity of Pt electrode in 0.5 m H2SO4 solution.
36 citations
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TL;DR: In this article, two kinds of electrochemical sensors were prepared using glassy carbon electrodes modified with poly(9-aminoacridine) and PAA-functionalized multi-walled carbon nanotubes (PAA-MWCNTs) for the determination of tryptophan (Trp) in the presence of tyrosine (Tyr).
35 citations
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TL;DR: The electrokinetic technology was applied in bioremediation for the purpose of supplying a Pseudomonas strain capable of degrading diesel to contaminated soil bed, and their biodegradation of diesel was carried out after a desired cell distribution was obtained.
Abstract: The electrokinetic technology was applied in bioremediation for the purpose of supplying a Pseudomonas strain capable of degrading diesel to contaminated soil bed, and their biodegradation of diesel was carried out after a desired cell distribution was obtained. Electrokinetic injection of the strain was made possible because the cells acted as negatively charged particles at neutral pH, and thus the cells were transported with a precise directionality through the soil mostly by the mechanism of electrophoresis and in part by electroosmosis. A severe pH change in the soil bed was formed due to the penetration of electrolysis products, which was harmful to the cell viability and cell transport. To achieve a desirable cell transport and distribution, the control of pH in soil bed by a recirculating buffer solution in electrode chambers was essential during the application of an electric field. The judicious selections of electrolyte concentration and conductivity were also important for achieving an efficient electrokinetic cell transport since a higher electrolyte concentration favored the maintenance of pH stability in soil bed, but lowered electrophoretic mobility on the other hand. With electrolyte solution of pH 7 phosphate buffer, a 0.05 M concentration showed a better cell transport than 0.02 M and 0.08 M. The cells under pH 8 were transported more efficiently, and even more cell distribution was obtained, compared to the cells under pH 7 or pH 9 in a given time period. Up to 60% of diesel was degraded in 8 days by the Pseudomonas cells, which were distributed electrokinetically under the conditions of pH 8 (1,800 μS/cm, a mixture of phosphate and ammonia buffers) and 40 mA in a soil bed of 15 cm length.
35 citations