Results 31 to 40 of about 2,024 (141)

Methodology studies on one and two carbon ring expansion on polyether polycyclic natural products [PDF]

open access: yes, 2020
Medium sized cyclic ethers are found in many natural products, with the most notable example being the polyether polycyclic family of marine toxins. Due to their increased size loss of entropy, torsional strain and unfavourable transannular interactions,
Mamalis, Dimitrios
core   +1 more source

A Review on the Biodiversity and Biogeography of Toxigenic Benthic Marine Dinoflagellates of the Coasts of Latin America

open access: yesFrontiers in Marine Science, 2019
Many benthic dinoflagellates are known or suspected producers of lipophilic polyether phycotoxins, particularly in tropical and subtropical coastal zones. These toxins are responsible for diverse intoxication events of marine fauna and human consumers of
Lorena María Durán-Riveroll   +3 more
doaj   +1 more source

Association of the Toxigenic Dinoflagellate Alexandrium ostenfeldii With Spirolide Accumulation in Cultured Mussels (Mytilus galloprovincialis) From Northwest Mexico

open access: yesFrontiers in Marine Science, 2018
Spirolides are polyether cyclic imines considered as “fast acting toxins.” Long-term human health consequences of spirolide ingestion are uncertain, and hence regulatory limits for human consumption have not been established.
Patricia Paredes-Banda   +6 more
doaj   +1 more source

CuAAC click chemistry for the enhanced detection of novel alkyne-based natural product toxins [PDF]

open access: yes, 2018
In the context of discovering and quantifying terminal alkyne-based natural products, here we report the combination of CuAAC click chemistry with LC-MS for the detection of polyether toxins (prymnesins) associated with harmful algal blooms.
Wagstaff, Ben A.   +4 more
core   +1 more source

LC–HRMS and Chemical Derivatization Strategies for the Structure Elucidation of Caribbean Ciguatoxins: Identification of C-CTX-3 and -4

open access: yesMarine Drugs, 2020
Ciguatera poisoning is linked to the ingestion of seafood that is contaminated with ciguatoxins (CTXs). The structural variability of these polyether toxins in nature remains poorly understood due to the low concentrations present even in highly toxic ...
Fedor Kryuchkov   +4 more
doaj   +1 more source

Environmental Identification of Novel Enzymes for Polyurethane and Polyamide Degradation

open access: yesAngewandte Chemie, EarlyView.
Heteroatom‐containing plastics such as polyurethanes and nylons are produced at scale yet remain largely unrecycled. Biocatalysts offer a promising route to depolymerization under mild conditions. Here, we present a screening platform for the discovery of novel polyurethane‐ and nylon‐degrading enzymes from environmental samples and demonstrate ...
Malthe Kjær Bendtsen   +17 more
wiley   +2 more sources

Transcriptomic analysis of polyketide synthases in a highly ciguatoxic dinoflagellate, Gambierdiscus polynesiensis and low toxicity Gambierdiscus pacificus, from French Polynesia.

open access: yesPLoS ONE, 2020
Marine dinoflagellates produce a diversity of polyketide toxins that are accumulated in marine food webs and are responsible for a variety of seafood poisonings.
Frances M Van Dolah   +5 more
doaj   +1 more source

Alternative method to detect compounds produced by Gambierdiscus spp.

open access: yesFrontiers in Marine Science, 2014
Ciguatoxins (CTXs) and CTX precursors are produced by several Gambierdiscus spp. These polyether toxins are associated to ciguatera fish poisoning (CFP). In addition to CTX, maitotoxins (MTX) and gambierol are also produced by these dinoflagellates.
Jon Andoni Sánchez
doaj   +1 more source

Clusterization‐Triggered Emission from Cellulose‐Based Luminophores in Dilute Aqueous Solution through Imine Formation

open access: yesAdvanced Functional Materials, EarlyView.
Clusterization‐triggered emission is realized in dilute aqueous solution by introducing imine linkages into cellulose‐based luminophores. Imine functionalization creates O/N‐rich, hydrogen‐bonded clustered microenvironments that stabilize emissive states and restrict molecular motions. Luminescence is tunable by amine type and multiplicity.
Yazhou Su   +5 more
wiley   +1 more source

A New Cytotoxicity Assay for Brevetoxins Using Fluorescence Microscopy

open access: yesMarine Drugs, 2014
Brevetoxins are a family of ladder-framed polyether toxins produced during blooms of the marine dinoflagellate, Karenia brevis. Consumption of shellfish or finfish exposed to brevetoxins can lead to the development of neurotoxic shellfish poisoning.
Jennifer R. McCall   +2 more
doaj   +1 more source

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