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A pyrene-based fluorescent sensor for the discrimination and estimation of hydrazine and hydrogen sulfide and its application in assessing food spoilage.
J Hazard Mater
January 2025
Department of Chemistry, National Institute of Technology Calicut, Kerala 673601, India. Electronic address:
Hydrazine (NH) and hydrogen sulfide (HS) are environmental contaminants that adversely affect human health. Fluorescence-based detection methods for these analytes utilize their nucleophilicity and reducing ability. Therefore, fluorescent sensors capable of detecting and distinguishing hydrazine and HS are highly beneficial.
View Article and Find Full Text PDFA dye-decolorizing peroxidase from Vibrio cholerae can demetallate heme.
J Inorg Biochem
January 2025
Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan; Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-8628, Japan.
Iron is an essential element for bacterial survival. Bacterial pathogens have therefore developed methods to obtain iron. Vibrio cholerae, the intestinal pathogen that causes cholera, utilizes heme as an iron source.
View Article and Find Full Text PDFManganese Sulfanyl Porphyrazine-MWCNT Nanohybrid Electrode Material as a Catalyst for HO and Glucose Biosensors.
Sensors (Basel)
September 2024
Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland.
Article Synopsis
- The demetallation and remetallation of sulfanyl magnesium(II) porphyrazine with manganese(II) salts produce a novel manganese(III) derivative (Pz3), which was characterized using various spectroscopy techniques.
- Electrochemical testing showed that Pz3 has notable activity, especially when combined with multiwalled carbon nanotubes (MWCNTs), leading to improved detection of hydrogen peroxide (HO) compared to other electrode configurations.
- A biosensing platform for glucose detection was developed by integrating a glucose oxidase enzyme with the modified electrode, resulting in effective glucose readings in a linear range from 0.2 to 3.7 mM.
Paper-based isotachophoretic preconcentration technique for low-cost determination of glyphosate.
Anal Bioanal Chem
December 2024
Chemistry Department, Eberhard Karls Universität, Auf der Morgenstelle 18, 72076, Tübingen, Germany.
Electrophoretic microfluidic paper-based analytical devices (e-µPADs) are promising for low-cost and portable technologies, but quantitative detection remains challenging. In this study, we develop a paper-based isotachophoretic preconcentration and separation method for the herbicide glyphosate as a model analyte. The device, consisting of two electrode chambers filled with leading and terminating electrolytes and a nitrocellulose strip as the separation carrier, was illuminated by a flat light source and operated with a voltage supply of 400 V.
View Article and Find Full Text PDFA water-soluble colorimetric chemosensor for sequential probing of Cu and S and its practical applications to test strips, reversible test, and water samples.
J Inorg Biochem
July 2024
Department of Fine Chem., SNUT (Seoul National Univ. of Sci. and Tech.), Seoul 139-743, Republic of Korea. Electronic address:
A water-soluble colorimetric chemosensor NHOP ((E)-1-(2-(2-(2-hydroxy-5-nitrobenzylidene)hydrazineyl)-2-oxoethyl)pyridin-1-ium) chloride) was developed for the sequential probing of Cu and S. NHOP underwent a color change from pale yellow to colorless in the presence of Cu in pure water. The binding ratio between NHOP and Cu was confirmed to be 1:1 by the Job plot and ESI-MS (electrospray ionization mass spectrometry).
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