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Haslea ostrearia-like Diatoms

2014
Diatoms are usually referred to as golden-brown microalgae, due to the colour of their plastids and to their pigment composition, mainly carotenoids (fucoxanthin, diadinoxanthin, diatoxanthin), which mask chlorophylls a and c. The species Haslea ostrearia Gaillon/Bory (Simonsen) appears unique because of its extraplastidial bluish colour, a consequence
Romain Gastineau, Nikolai Davidovich, Gert Hansen, Jan Rines, Angela Wulff, Irena Kaczmarska, James Ehrman, Dorothée Hermann, Florian Maumus, Yann Hardivillier, Vincent Leignel, Boris Jacquette, Vona Méléder, Gustaaf Hallegraeff, Marian Yallop, Rupert Perkins, Jean-Paul Cadoret, Bruno Saint-Jean, Grégory Carrier, Jean-Luc Mouget   +19 more
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Configurations of polyunsaturated sesterterpenoids from the diatom, Haslea ostrearia

Phytochemistry, 2000
The partial configurations of C25 isoprenoid alkenes isolated from the diatom Haslea ostrearia Gaillon (Simonsen) have been established. A combination of NMR spectroscopy studies of the alkenes with chiral shift reagents in conjunction with soluble silver beta-diketonate complexes and enantioselective gas chromatography of oxidation products of the ...
L, Johns, S, Belt, C A, Lewis, S, Rowland, G, Massé, J M, Robert, W A, König   +6 more
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Tetra-unsaturated sesterterpenoids (Haslenes) from Haslea ostrearia and related species

Phytochemistry, 2001
The structures and distributions of C25 highly branched isoprenoid (HBI) alkenes (Haslenes) have been determined following isolation from cultures of the diatoms Haslea ostrearia, Haslea crucigera, Haslea pseudostrearia and Haslea saltstonica. The distributions of the HBIs change between Haslea species and also between different cultures of the same ...
W G, Allard, S T, Belt, G, Massé, R, Naumann, J M, Robert, S, Rowland   +5 more
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Effects of temperature on polyunsaturation in cytostatic lipids of Haslea ostrearia

Phytochemistry, 2001
Unusual chemicals produced by the-'blue oyster' diatom, Haslea ostrearia, include the water-soluble blue pigment marennine and numerous polyunsaturated sesterterpene oils or haslenes. Aqueous extracts of the alga exhibit in vitro and in vivo activities against human lung cancer cells and anti-HIV effects.
S J, Rowland, S T, Belt, E J, Wraige, G, Massé, C, Roussakis, J M, Robert   +5 more
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Distribution of copper in the diatom Haslea ostrearia simonsen

Marine Environmental Research, 1998
Abstract Haslea ostrearia is a pennate diatom important for oysters culture. This species was selected to study experimentally the distribution of copper in algal cells since the phytoplankton exhibits a high capacity for metal accumulation and thus influences metal transfer to consumers. This alga was grown in batch culture and exposed to copper (30
L. Joux-Arab, B. Berthet, J.M. Robert
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Marennine production by agar-entrapped Haslea ostrearia Simonsen

Bioresource Technology, 1999
Abstract The pennate Diatom Haslea ostrearia was successfully immobilized in agar-gel disks and tested for marennine production in batch experiments. The concentration of pigment recovered varied between 34 and 92 mg l−1 liquid medium, according to the initial cell loading of the gel structures, which corresponded to volumetric production rates ...
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Alginate-entrapped Haslea ostrearia as inoculum for the greening of oysters

Biotechnology Techniques, 1998
Entrapment in calcium alginate beads of the marine diatom, Haslea ostrearia, was successfully used for stock-culture managment and afterwards the sowing of ponds for the greening of oysters. After storage during almost 2 months, viable and cultivable cells were recovered from beads by dissolving alginate matrix but an original way lies in directly ...
Thierry Lebeau, Richard Moan, Vincent Turpin, Jean-Michel Robert   +3 more
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Highly branched isoprenoid alcohols and epoxides in the diatom Haslea ostrearia Simonsen

Organic Geochemistry, 2006
Abstract The ability of certain diatoms, notably genera of Haslea and Rhizosolenia , to biosynthesise a series of C 25 highly branched isoprenoid (HBI) alkenes or haslenes seems to have first evolved about 90 million years ago in the late Cretaceous.
Simon T. Belt, Guillaume Massé, Steven J. Rowland, Michel Rohmer   +3 more
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Does allelopathy affect co-culturing Haslea ostrearia with other microalgae relevant to aquaculture?

Journal of Applied Phycology, 2015
Haslea ostrearia is a marine diatom known to produce marennine, a water-soluble blue-green pigment responsible for the greening of oysters in ponds along the French Atlantic coast. This phenomenon occurs seasonally when H. ostrearia blooms in oyster ponds, and it increases the economic value of cultured oysters.
Fiddy S. Prasetiya, Ikha Safitri, Ita Widowati, Bruno Cognie, Priscilla Decottignies, Romain Gastineau, Michèle Morançais, Eko Windarto, Réjean Tremblay, Jean-Luc Mouget   +9 more
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