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Chlorine-substituted transformation products generated during chlorination of the organophosphorus insecticide disulfoton induce anti-acetylcholine esterase activity.
Chemosphere
January 2025
Faculty of Engineering, Hokkaido University, N13W8, Sapporo, 060-8628, Japan. Electronic address:
Global concern regarding transformation products (TPs) derived from contaminants, including pesticides, in the environment and during water treatment has been growing markedly. In the present study, we investigated the anti-acetylcholinesterase (AChE) activity of an aqueous solution of the organophosphorus insecticide disulfoton, a toxicological endpoint for determining the acceptable daily intake of disulfoton, both in the presence and the absence of metabolism during chlorination. Disulfoton rapidly reacted with free chlorine and completely disappeared within 0.
View Article and Find Full Text PDFQuantification of micro- and nano-plastics in atmospheric fine particles by pyrolysis-gas chromatography-mass spectrometry with chromatographic peak reconstruction.
J Hazard Mater
January 2025
State Key Laboratory of Advanced Environmental Technology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou 510640, China.
The effects of micro- and nano-plastics (MNPs) on human health are of global concern because MNPs are ubiquitous, persistent, and potentially toxic, particularly when bound to atmospheric fine particles (PM). Traditional quantitative analysis of MNPs by pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS) is often inaccurate because of false positive signals caused by similar polymers and organic compounds. In this study, a reliable analytical strategy combining HNO digestion and chromatographic peak reconstruction was developed to improve the precision of pyrolysis-gas chromatography-mass spectrometry analysis of multiple MNPs bound to PM.
View Article and Find Full Text PDFPhytochemical profile of Taxus globosa Schltdl. and its anxiolytic, antinociceptive, and toxicological evaluation in mice.
J Ethnopharmacol
January 2025
Posgrado en Botánica, Colegio Postgraduados Campus Montecillo Km. 36.5 Carretera México-Texcoco C.P. Montecillo, 56264, Texcoco Estado de México, México. Electronic address:
Ethnopharmacological Relevance: Taxus globosa Schltdl. (Taxaceae) is commonly named "Tejo mexicano". It's a Mexican plant known in folk medicine as a remedy for pain such as stomachache and headache, arthritis, gout, and other inflammatory conditions.
View Article and Find Full Text PDF20-Deoxyingenol ester and ether derivatives: Synthesis, properties and cytotoxicity.
Bioorg Chem
January 2025
Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning 110016, China. Electronic address:
The C-3 and C-5 substituted 20-deoxyingenol monoesters are important active components in Euphorbiaceae plants. Nonetheless, their similar physical properties make them difficult to distinguish. The present study developed fast and efficient rules for identifying the esterification sites of 20-deoxyingenol based on a series of chemical syntheses of monoesters and literature research, utilizing NMR spectroscopy, optical rotation analysis, and chromatographic retention behavior.
View Article and Find Full Text PDFHydrophilic interaction chromatography coupled to high resolution mass spectrometry (HILIC-LC-HRMS): An approach to study natural peptides in Viperidae snake venom.
J Chromatogr A
January 2025
Laboratório Bioquímica e Biofísica, Instituto Butantan, São Paulo, Av. Vital Brasil 1500, São Paulo, SP 05503-900, Brazil. Electronic address:
Although proteins in snake venoms have been extensively studied and characterized, low-mass molecules remain relatively unexplored, mainly due to their low abundance, secondary role in envenomation, and some analytical technique limitations. However, these small molecules can provide new important data related to venom toxins' molecular structure, functions, and evolutionary relationships. This research aimed to characterize molecules below 10 kDa in the venoms of snakes from the Viperidae families (Bothrops, Agkistrodon, and Bitis) and compare two chromatographic approaches: reverse-phase chromatography (RP), a classic technique, and hydrophilic interaction liquid chromatography (HILIC), an alternative technique, both coupled with high-resolution mass spectrometry (HRMS).
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