Manioc : Portail | resultats 21 - 40 pour la recherche: Walker, Thomas J.

Antigua and the Antiguans: a full account of the colony and its inhabitants from the time of the Caribs to the present day, interspersed with anecdotes and legends : also, an impartial view of slavery and the free labour systems, the statistics of the island, and biographical notices of the principal families, Volume 1
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Manuel des cultures tropicales. Tome II, 1ère partie, Culture du caféier : semis, plantation, taille, cueillette, dépulpation, décorticage, expédition, commerce, espèces et races
Auteur(s) : Raoul, Edouard François Armand (1845-1898)
Auteurs secondaires : Darolles, Jean-Bertrand-Henry-Edouard (1843-1916)
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De la pétition des ouvriers pour l'abolition immédiate de l'esclavage
Auteur(s) : Schoelcher, Victor (1804-1893)
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Reports from committees : eighteen volumes. Sugar and coffee planting. Session 18 november 1847 - 5 september 1848. Part. 2
Auteur(s) : Grande Bretagne. House of commons. Library
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Reports from committees : eighteen volumes. Sugar and coffee planting. Session 18 november 1847 - 5 september 1848. Part. 1
Auteur(s) : Grande Bretagne. House of commons. Library
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Reports from committees : eighteen volumes. Sugar and coffee planting. Session 18 november 1847 - 5 september 1848. Part. 3
Auteur(s) : Grande Bretagne. House of commons. Library
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Rapport sur les questions coloniales adressé à M. le duc de Broglie,... à la suite d'un voyage fait aux Antilles et aux Guyanes pendant les années 1838 et 1839. Tome 1, Documents et pièces justificatives. Première partie, Pièces écrites et recueillies pendant le voyage, enquêtes
Auteur(s) : Lechevalier Saint-André, Jules (1806-1862)
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Bibliographie d'histoire coloniale : 1900-1930
Auteur(s) : Martineau, Alfred (1859-1945) Roussier, Paul (1882-1965) Tramond, Joannès (1882-1935)
Auteurs secondaires : Congrès international d'histoire coloniale (1 ; 1931 ; Paris)
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State of knowledge and concerns on cyanobacterial blooms and cyanotoxins.
Auteur(s) : Merel, Sylvain Walker, David Chicana, Ruth Snyder, Shane Baurès, Estelle Thomas, Olivier
Auteurs secondaires : University of Arizona ; University of Arizona LERES ; Institut de recherche, santé, environnement et travail [Rennes] (Irset) ; INSERM - École Nationale de la Santé Publique - Université de Rennes 1 (UR1) - Université des Antilles et de la Guyane (UAG) - Structure Fédérative de Recherche en Biologie-Santé de Rennes (Biosit) ; Université de Rennes 1 (UR1) - INSERM - CNRS - INSERM - CNRS - INSERM - École Nationale de la Santé Publique - Université de Rennes 1 (UR1) - Université des Antilles et de la Guyane (UAG) - Structure Fédérative de Recherche en Biologie-Santé de Rennes (Biosit) ; Université de Rennes 1 (UR1) - INSERM - CNRS - INSERM - CNRS

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
Cyanobacteria are ubiquitous microorganisms considered as important contributors to the formation of Earth's atmosphere and nitrogen fixation. However, they are also frequently associated with toxic blooms. Indeed, the wide range of hepatotoxins, neurotoxins and dermatotoxins synthesized by these bacteria is a growing environmental and public health concern. This paper provides a state of the art on the occurrence and management of harmful cyanobacterial blooms in surface and drinking water, including economic impacts and research needs. Cyanobacterial blooms usually occur according to a combination of environmental factors e.g., nutrient concentration, water temperature, light intensity, salinity, water movement, stagnation and residence time, as well as several other variables. These environmental variables, in turn, have promoted the evolution and biosynthesis of strain-specific, gene-controlled metabolites (cyanotoxins) that are often harmful to aquatic and terrestrial life, including humans. Cyanotoxins are primarily produced intracellularly during the exponential growth phase. Release of toxins into water can occur during cell death or senescence but can also be due to evolutionary-derived or environmentally-mediated circumstances such as allelopathy or relatively sudden nutrient limitation. Consequently, when cyanobacterial blooms occur in drinking water resources, treatment has to remove both cyanobacteria (avoiding cell lysis and subsequent toxin release) and aqueous cyanotoxins previously released. Cells are usually removed with limited lysis by physical processes such as clarification or membrane filtration. However, aqueous toxins are usually removed by both physical retention, through adsorption on activated carbon or reverse osmosis, and chemical oxidation, through ozonation or chlorination. While the efficient oxidation of the more common cyanotoxins (microcystin, cylindrospermopsin, anatoxin and saxitoxin) has been extensively reported, the chemical and toxicological characterization of their by-products requires further investigation. In addition, future research should also investigate the removal of poorly considered cyanotoxins (β-methylamino-alanine, lyngbyatoxin or aplysiatoxin) as well as the economic impact of blooms.
Environment International

hal-00875835
https://hal-univ-rennes1.archives-ouvertes.fr/hal-00875835
https://hal-univ-rennes1.archives-ouvertes.fr/hal-00875835/document
DOI : 10.1016/j.envint.2013.06.013
PUBMED : 23892224

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