Results 21 to 30 of about 925 (177)

Revisiting the HPLC-FLD Method to Quantify Paralytic Shellfish Toxins: C3,4 Quantification and the First Steps towards Validation

Toxins, 2022
Paralytic shellfish toxins (PSTs) are a large group of biotoxins that cause paralytic shellfish poisoning. Their appearance in natural waters and their ingestion by aquatic species have a huge socio-economic impact, whereby their monitoring is of the ...
Joana F. Leal, Maria L. S. Cristiano
doaj   +1 more source

A Year of Bio-Monitoring (2021): Presence of Algae of the Genus Alexandrium, Dinophysis, Prorocentrum and Non-Compliance for Paralytic Toxins and Lipophilic Toxins in Bivalve Mollusks Bred in Sardinia (W Mediterranean Sea)

Journal of Marine Science and Engineering, 2022
Bivalve mollusk production represents the principal aquaculture activity in Sardinia (40°03′ N, 9°05′ E). In 2021, 859 water samples and 1270 mollusk samples were analyzed.
Giuseppa Lorenzoni, Anna Maria Bazzoni, Monica Cangini, Sonia Dall’Ara, Rita Melillo, Alessandro Graziano Mudadu, Simona Cau, Barbara Soro, Salvatore Ledda, Gabriella Piras, Tiziana Tedde, Sara Salza, Igor Arras, Giuseppa Porqueddu, Domenico Meloni   +14 more
doaj   +1 more source

Cyanotoxins and water quality parameters as risk assessment indicators for aquatic life in reservoirs

Ecotoxicology and Environmental Safety, 2022
We assessed the extent of pollution in an essential public water supply reservoir (southeastern Brazil). An environmental monitoring study was performed at the Billings Reservoir (at the water catchment site) to assess the water quality in 2017, 2018 ...
Larissa Souza Passos, Éryka Costa de Almeida, Alexandre Villela, Adilson Nunes Fernandes, Marcelo Manzi Marinho, Levy Carvalho Gomes, Ernani Pinto   +6 more
doaj   +1 more source

Latitudinal Variation in the Toxicity and Sexual Compatibility of Alexandrium catenella Strains from Southern Chile

Toxins, 2021
The bloom-forming toxic dinoflagellate Alexandrium catenella was first detected in southern Chile (39.5–55° S) 50 years ago and is responsible for most of the area’s cases of paralytic shellfish poisoning (PSP).
Camilo Rodríguez-Villegas, Patricio A. Díaz, Pilar Riobó, Araceli E. Rossignoli, Francisco Rodríguez, Patricia Loures, Ángela M. Baldrich, Daniel Varela, Alondra Sandoval-Sanhueza, Rosa I. Figueroa   +9 more
doaj   +1 more source

Review on Cyanobacterial Studies in Portugal: Current Impacts and Research Needs

Applied Sciences, 2021
Cyanobacteria have long been associated with harmful effects on humans, animals and aquatic biota. Cyanotoxins are their most toxic metabolite. This review summarizes the current research, impacts and future needs in cyanobacterial studies undertaken in ...
Cristiana Moreira, Alexandre Campos, José Carlos Martins, Vitor Vasconcelos, Agostinho Antunes   +4 more
doaj   +1 more source

Cyanotoxins Occurrence in Portugal: A New Report on Their Recent Multiplication

Toxins, 2020
Historical reports show that in Portugal, cyanotoxins reports were mainly in the Center (cylindrospermopsins) and South (cylindrospermopsins, saxitoxins) regions of the country apart from the well distributed microcystins.
Cristiana Moreira, Cidália Gomes, Vitor Vasconcelos, Agostinho Antunes   +3 more
doaj   +1 more source

A Stereocontrolled Synthesis of (+)-Saxitoxin [PDF]

Journal of the American Chemical Society, 2011
A concise stereoselective total synthesis of (+)-saxitoxin is described. A silver(I)-initiated hydroamination cascade constructs the bicyclic guanidinium ion core from a alkynyl bisguanidine. This sequence creates two C-N bonds, one C-O bond, and three rings and forms a single stereoisomer in a single synthetic transformation.
Vasudev R, Bhonde, Ryan E, Looper
openaire   +2 more sources

Statewide Intensification of Harmful Algal Blooms Across California Lakes and Reservoirs. [PDF]

Geohealth
Abstract Monitoring cyanobacteria is crucial for assessing water quality, safeguarding public health, and understanding ecosystem dynamics impacted by harmful algal blooms. This study explores the potential of satellite remote sensing (SRS) to assess risks of cyanotoxin exposure in California's recreational waters from 2002 to 2011 and 2016 to 2023 ...
Barreto Martinez BN, Hestir EL, Beutel MW, Lee CM.   +3 more
europepmc   +2 more sources

Semiquantitation of Paralytic Shellfish Toxins by Hydrophilic Interaction Liquid Chromatography-Mass Spectrometry Using Relative Molar Response Factors

Toxins, 2020
Paralytic shellfish toxins (PSTs) are a complex class of analogs of the potent neurotoxin saxitoxin (STX). Since calibration standards are not available for many PSTs, including C-11 hydroxyl analogs called M-toxins, accurate quantitation by liquid ...
Jiangbing Qiu, Elliott J. Wright, Krista Thomas, Aifeng Li, Pearse McCarron, Daniel G. Beach   +5 more
doaj   +1 more source

First Toxicological Analysis of the Pufferfish Sphoeroides pachygaster Collected in Italian Waters (Strait of Sicily): Role of Citizens Science in Monitoring Toxic Marine Species

Animals, 2023
Pufferfish (Tetraodontidae) inhabiting the Mediterranean Sea may represent an emerging public health risk due to the possible accumulation of marine neurotoxins such as tetrodotoxin (TTXs) and saxitoxin (STXs) in their tissues.
Chiara Malloggi, Biagio Rizzo, Alice Giusti, Lisa Guardone, Laura Gasperetti, Sonia Dall’Ara, Andrea Armani   +6 more
doaj   +1 more source