Results 51 to 60 of about 507 (132)

Synthesis of spiroketal and 3-ketotetrahydrofuran motifs from natural products using singlet oxygen [PDF]

, 2009
The synthesis of the [6,6,5]-bispiroketal skeleton of the natural product salinomycin is described in this thesis. A cascade sequence initiated by a [4+2]-cycloaddition of singlet oxygen (1O2) to a furylic ketone followed by two sequential cyclizations ...
Τοφή, Μαρία, Tofi, Maria
core   +2 more sources

Sublethal exposure of eastern oyster Crassostrea virginica to the goniodomin‐producing dinoflagellate Alexandrium monilatum: Fate of toxins, histopathology, and gene expression

Journal of Aquatic Animal Health, Volume 36, Issue 4, Page 374-394, December 2024.
Abstract Objective The dinoflagellate Alexandrium monilatum forms blooms during summer in tributaries of the lower Chesapeake Bay. Questions persist about the potential for A. monilatum to negatively affect aquatic organisms. Its main toxin, goniodomin A (GDA), a polyketide macrolide, has been shown to have adverse effects on animals, for example ...
Sylvain Gaillard, Hamish J. Small, Ryan B. Carnegie, Thomas M. Harris, Simon Tanniou, Damien Réveillon, Philipp Hess, Kimberly S. Reece   +7 more
wiley   +1 more source

Field monitoring of copepodamides using a new application for solid phase adsorption toxin tracking

Limnology and Oceanography: Methods, Volume 22, Issue 12, Page 877-888, December 2024.
Abstract Chemical signaling is ubiquitous in the marine environment. Plankton rely on chemical signals to find mates, hunt prey, and respond to threats, and these small‐scale interactions can propagate into community‐wide cascades and large‐scale ecological changes. The chemical signaling exchange in the open ocean is poorly understood, and fundamental
Aubrey Trapp, Erik Selander, Melissa Peacock, Raphael M. Kudela   +3 more
wiley   +1 more source

Prey morphotype and abundance controls plastid retention and bloom dynamics for a mixotrophic dinoflagellate

Limnology and Oceanography, Volume 69, Issue 11, Page 2732-2747, November 2024.
Abstract Dinophysis is an obligate mixotroph that relies on consumption of the ciliate, Mesodinium rubrum, to grow and form harmful algal blooms (HABs). In this study, blooms of Dinophysis acuminata in two NY, USA, estuaries were studied over the course of 3 yr (2019–2021) using discrete samples and an Imaging FlowCytobot (IFCB) to capture images of ...
Megan Ladds, Heidi M. Sosik, Christopher J. Gobler   +2 more
wiley   +1 more source

Scientific opinion on marine biotoxins in shellfish in the Republic of Croatia

Food Risk Assess Europe, Volume 2, Issue 2, April 2024.
Summary Marine biotoxins are thermostable, mostly non‐protein molecules with different chemical components. According to solubility, they are divided into water‐soluble (hydrophilic) and fat‐soluble (lipophilic). The regulations of the EU and the Republic of Croatia regarding the maximum limits (ML) in live shellfish cover several groups: azaspiracids (
Brigita Hengl, Jasenka Petrić, Andrea Gross – Bošković, Ivana Ujević, Eddy Listeš, Tanja Bogdanović, Natalija Džafić, Kristina Kvrgić   +7 more
wiley   +1 more source

Pectenotoxins - an issue for public health - A review of their comparative toxicology and metabolism

, 2001
Pectenotoxins (PTXs) are a group of toxins associated with diarrhetic shellfish poisoning (DSP) and isolated from DSP toxin-producing dinoflagellate algae.
Shaw, G, Glen Shaw, Vanessa Burgess, Burgess, V., Burgess, Vanessa, Shaw, Glendon Reginald   +5 more
core   +1 more source

Synthesis of the ABC spiroketal motif of pectenotoxins 2c,8 ,9 and 11c. [PDF]

, 2010
Στην παρούσα εργασία παρουσιάζεται η σύνθεση του ABC [6,6]-σπειροκεταλικού σκελετού των φυσικών προϊόντων Pectenotoxins 2c, 8, 9, και 11c. Στάδιο κλειδί είναι μια διπλή [4+2] κυκλοπροσθήκη μεταξύ του διεγερμένου οξυγόνου απλής κατάστασης (1O2) και ...
Αλεξοπούλου, Ιωάννα Αχιλλέα, Alexopoulou, Ioanna   +1 more
core  

Enzymatic hydrolysis of the esterfied diarrhetic shellfish poisoning toxins and pectenotoxins

, 2007
Okadaic acid (OA) and dinophysistoxins-1 and -2 (DTX1, DTX2), the toxins responsible for incidents of diarrhetic shellfish poisoning (DSP), can occur as complex mixtures of ester derivatives in both plankton and shellfish.
Quilliam, Michael A., Doucet, Erin, Ross, Neil N.   +2 more
core   +1 more source

Access to Both Anomers of Pectenotoxin Spiroketals by Kinetic Spiroketalization

, 2016
A concise synthesis of both AB ring spiroisomers of the pectenotoxins is described. The nonanomeric AB spiroketal ring system of the pectenotoxins-1, -2, -3, and -6 is formed under very mild, kinetic spiroketalization conditions, along with the anomeric ...
Jatta E. Aho (2416474), Petri M. Pihko (1702507)   +1 more
core   +1 more source

Notes on the Cultivation of Two Mixotrophic Dinophysis Species and Their Ciliate Prey Mesodinium rubrum

Toxins, 2018
Kleptoplastic mixotrophic species of the genus Dinophysis are cultured by feeding with the ciliate Mesodinium rubrum, itself a kleptoplastic mixotroph, that in turn feeds on cryptophytes of the Teleaulax/Plagioselmis/Geminigera (TPG) clade.
Jorge Hernández-Urcera, Pilar Rial, María García-Portela, Patricia Lourés, Jane Kilcoyne, Francisco Rodríguez, Amelia Fernández-Villamarín, Beatriz Reguera   +7 more
doaj   +1 more source