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You searched for: Subject liquid chromatography Remove constraint Subject: liquid chromatography Subject term Gonyaulax Remove constraint Subject term: Gonyaulax
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1. The marine dinoflagellate Alexandrium ostenfeldii (Dinophyceae) as the causative organism of spirolide shellfish toxins

Author:
A. D. Cembella; N. I. Lewis; M. A. Quilliam
Source:
Phycologia 2000 v.39 no.1 pp. 67-74
ISSN:
2330-2968
Subject:
Alexandrium tamarense; Gonyaulax; coasts; light microscopy; liquid chromatography; plankton; shellfish; tandem mass spectrometry; Nova Scotia
Abstract:
... A suite of biologically active compounds, fast-acting toxins called spirolides, were recently isolated and characterized from shellfish and plankton samples collected from southeastern Nova Scotia, Canada. Circumstantial evidence from natural plankton assemblages has linked spirolides to gonyaulacoid dinoflagellates, particularly athecate cells (GB-42) that are derived from motile stages from this ...
DOI:
10.2216/i0031-8884-39-1-67.1

2. Analytical screening of marine algal toxins for seafood safety assessment in a protected Mediterranean shallow water environment

Author:
Monica Mattarozzi; Antonella Cavazza; Anna Calfapietra; Monica Cangini; Silvia Pigozzi; Federica Bianchi; Maria Careri
Source:
Food additives & contaminants 2019 v.36 no.4 pp. 612-624
ISSN:
1944-0057
Subject:
Alexandrium; European Union; Gonyaulax; amnesic shellfish poisoning; aquaculture; breeding sites; clams; coasts; disease severity; ecosystems; farms; food safety; imines; lakes; lipophilicity; liquid chromatography; mass spectrometry; microalgae; monitoring; multiresidue analysis; mussels; natural toxicants; paralytic shellfish poisoning; phytoplankton; safety assessment; screening; seafoods; shellfish; toxicity; yessotoxin; Sicily
Abstract:
... Microalgal species growing in marine and aquaculture environments can be responsible for harmful events because of their ability to produce potent natural toxins that can accumulate in edible mollusc species. Their consumption can cause severe illness and even be lethal. The European Union provides comprehensive regulations covering various general food safety aspects to manage the risk of contami ...
DOI:
10.1080/19440049.2019.1581380

3. Contamination status of lipophilic marine toxins in shellfish samples from the Bohai Sea, China

Author:
Yang Liu; Ren-Cheng Yu; Fan-Zhou Kong; Chen Li; Li Dai; Zhen-Fan Chen; Hui-Xia Geng; Ming-Jiang Zhou
Source:
Environmental pollution 2019 v.249 pp. 171-180
ISSN:
0269-7491
Subject:
Dinophysis acuminata; Dinophysis fortii; Gonyaulax; Prorocentrum; aquaculture; azaspiracid; clams; lipophilicity; liquid chromatography; monitoring; mussels; okadaic acid; oysters; poisonous algae; scallops; seafoods; seasonal variation; shellfish; tandem mass spectrometry; yessotoxin; China; Yellow Sea
Abstract:
... Lipophilic marine toxins in shellfish pose significant threats to the health of seafood consumers. To assess the contamination status of shellfish by lipophilic marine toxins in the Bohai Sea, nine species of shellfish periodically collected from five representative aquaculture zones throughout a year were analyzed with a method of liquid chromatography-tandem mass spectrometry (LC–MS/MS). Lipophi ...
DOI:
10.1016/j.envpol.2019.02.050

4. Phylogenetic analysis and yessotoxin profiles of Gonyaulax spinifera cultures from the Benguela Current upwelling system

Author:
Chibo Chikwililwa; Pearse McCarron; Joanna J. Waniek; Detlef E. Schulz-Bull
Source:
Harmful algae 2019 v.85 pp. 101626
ISSN:
1568-9883
Subject:
Gonyaulax; algal blooms; coasts; euphotic zone; hydroxylation; liquid chromatography; mass spectrometry; molecular genetics; oceans; phylogeny; phytoplankton; poisonous algae; primary productivity; toxicity; yessotoxin; Italy; Namibia; New Zealand
Abstract:
... The Benguela Current in the Atlantic is one of the four major upwelling systems on the Eastern boundary of the world ocean. Thus the coastal regions off Namibia are prone to high primary productivity that can lead to Harmful Algae Blooms as this nutrient rich water reaches the euphotic zone. Yessotoxins (YTXs) produced by G. spinifera were detected in Namibian phytoplankton field samples in 2011. ...
DOI:
10.1016/j.hal.2019.101626

5. Structure Elucidation and Relative Toxicity of (24R)-24-Hydroxyyessotoxin from a Namibian Isolate of Gonyaulax spinifera

Author:
Isabelle Rajotte; Cheryl Rafuse; Elliott J. Wright; John C. Achenbach; Lee D. Ellis; Pearse McCarron
Source:
Journal of natural products 2019 v.82 no.7 pp. 1945-1952
ISSN:
1520-6025
Subject:
Danio rerio; Gonyaulax; biomass; hydroxylation; liquid chromatography; mass spectrometry; nuclear magnetic resonance spectroscopy; solvents; toxicity; yessotoxin
Abstract:
... Liquid chromatography–high-resolution mass spectrometry (LC-HRMS) analysis of a Namibian strain of Gonyaulax spinifera showed the presence of a number of yessotoxins (YTXs). Principal among these were YTX (1), homoYTX (2), and a tentative hydroxylated analogue that did not correspond to any previously confirmed YTX structures. Culturing the G. spinifera strain afforded sufficient biomass for purif ...
DOI:
10.1021/acs.jnatprod.9b00318

6. Assessment of the Presence of Lipophilic Phycotoxins in Scallops (Argopecten purpuratus) Farmed along Peruvian Coastal Waters

Author:
Vanessa Leyva; Helena Maruenda
Source:
Journal of food protection 2021 v.84 no.2 pp. 204-212
ISSN:
0362-028X
Subject:
Argopecten purpuratus; Dinophysis acuminata; Gonyaulax; azaspiracid; coastal water; coasts; dinophysistoxins; food safety; hepatopancreas; lipophilicity; liquid chromatography; monitoring; okadaic acid; phytoplankton; poisonous algae; scallops; shellfish; tandem mass spectrometry; yessotoxin; Peru
Abstract:
... Some harmful algal blooms produce lipophilic marine biotoxins (LMTs) such as okadaic acid (OA; and its analogs dinophysistoxins [DTXs]), yessotoxins (YTXs), pectenotoxins (PTXs), and azaspiracids (AZAs), all of which may accumulate in filter-feeding bivalve mollusks. European health regulations stipulate a limit of 160 μg/kg for OA or DTXs, PTXs, and AZAs and 3.75 mg/kg for YTXs. Argopecten purpur ...
DOI:
10.4315/JFP-20-212

7. Unraveling the Gonyaulax baltica Species Complex: Cyst–theca Relationship of Impagidinium variaseptum, Spiniferites pseudodelicatus sp. nov. and S. ristingensis (Gonyaulacaceae, Dinophyceae), With Descriptions of Gonyaulax bohaiensis sp. nov, G. amoyensis sp. nov. and G. portimonensis sp. nov.

Author:
Haifeng Gu; Kenneth Neil Mertens; Amélie Derrien; Gwenael Bilien; Zhen Li; Philipp Hess; Véronique Séchet; Bernd Krock; Ana Amorim; Zhun Li; Vera Pospelova; Kirsty F. Smith; Lincoln MacKenzie; Joo Yeon Yoon; Hyun Jung Kim; Hyeon Ho Shin
Source:
Journal of phycology 2022 v.58 no.3 pp. 465-486
ISSN:
0022-3646
Subject:
Gonyaulax; algology; genes; germination; liquid chromatography; new species; phylogeny; tandem mass spectrometry; yessotoxin; New Zealand; South Korea
Abstract:
... The taxonomy of the extant dinoflagellate genus Gonyaulax is challenging since its thecate morphology is rather conservative. In contrast, cysts of Gonyaulax are varied in morphology and have been related with the fossil‐based genera Spiniferites and Impagidinium. To better understand the systematics of Gonyaulax species, we performed germination experiments on cysts that can be identified as S. r ...
DOI:
10.1111/jpy.13245