Results 101 to 110 of about 324 (136)

Antiviral and Anticoagulant Activities of a Water-Soluble Fraction of the Marine Diatom Haslea ostrearia

Planta Medica, 1999
A water-soluble fraction from the marine diatom Haslea ostrearia was capable to inhibit the in vitro replication of HSV-1 in Vero cells with 50% inhibitory concentration (EC50) of 14 micrograms/ml at a multiplicity of infection of 0.01 ID50/cells. In addition, this fraction delayed the HIV-1-induced syncitia formation on MT4 cells. At concentrations up
Jean-Pascal Berge, Nathalie Bourgougnon, S Alban   +2 more
exaly   +4 more sources

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
core   +4 more sources

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Enhancement of marennine production by blue light in the diatom Haslea ostrearia

Journal of Applied Phycology, 2005
The marine diatom Haslea ostrearia Simonsen produces a blue pigment, marennine, which is used for greening oysters. This microalga is cultured industrially indoors with artificial light. The influence of light quality on marennine production by cultures of H. ostrearia was investigated in the laboratory and at a semi-pilot scale (300 L tanks).
Jean-Luc Mouget, Mouget Jean-Luc
exaly   +2 more sources

Hybrid photobioreactor operation for the intensified production of Haslea ostrearia and marennine in function of strain variability

Algal Research, 2023
International audience ; Marennine is a high-value compound produced by the benthic diatom Haslea ostrearia, which could be used as an alternative to synthetic antibiotics in aquaculture. Over the last few years, however, low production rates have been impeding its exploitation. Recent progress on H.
Pedron, Elodie, Gargouch, N., Mouget, J.-L., Tremblay, R., Deschênes, J.-S., Massé, A., Gonçalves, O.   +6 more
openaire   +3 more sources

Microalgal cell immobilization for the long-term storage of the marine diatom Haslea ostrearia

Journal of Applied Phycology, 2006
To preserve the characteristics of the marine diatom Haslea ostrearia during long term storage, particularly size and shape, the algal cells were immobilized in alginate beads and stored at 4 ∘C at reduced irradiance up to 4 months. Two clones of different size (Ho34, 63 μm and Ho40, 78 μm) were studied.
Thierry Lebeau, Jean-Michel Robert, Lebeau Thierry   +2 more
exaly   +2 more sources

Comparison of cryopreservation methods for the long term storage of the marine diatom Haslea ostrearia (simonsen)

Cryobiology, 2012
Long term maintenance of microalgal strains by serial subculturing is often expensive and time-consuming. Alternative methods, such as cryopreservation, present several benefits and thus seem more relevant. Our study aimed at comparing two cryopreservation procedures applied to the marine diatom Haslea ostrearia (Simonsen): (1) a two-step freezing ...
Tanniou, Anaelle, Turpin, Vincent, Lebeau, Thierry   +2 more
openaire   +5 more sources

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, Ita Widowati, Bruno Cognie   +2 more
exaly   +2 more sources

What Was Old Is New Again: The Pennate Diatom Haslea ostrearia (Gaillon) Simonsen in the Multi-Omic Age

Marine Drugs, 2022
The marine pennate diatom Haslea ostrearia has long been known for its characteristic blue pigment marennine, which is responsible for the greening of invertebrate gills, a natural phenomenon of great importance for the oyster industry. For two centuries,
Frédéric Verret, Aurélie Peticca, Igor Kryvoruchko   +2 more
exaly   +1 more source

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
openaire   +2 more sources

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
openaire   +2 more sources