Results 81 to 90 of about 291 (104)

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

Algal Research, 2023
International audienceMarennine is a high-value compound produced by the benthic diatom Haslea ostrearia, which could be used as an alternative to synthetic antibiotics in aquaculture.
Tremblay R
exaly   +4 more sources

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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 ...
Thierry Jouenne, G -A Junter
exaly   +2 more sources

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
exaly   +2 more sources

Purification of the blue-green pigment “marennine” from the marine tychopelagic diatom Haslea ostrearia (Gaillon/Bory) Simonsen

Journal of Applied Phycology, 2006
International audienceThe diatom Haslea ostrearia that lives in oyster ponds has the distinctive feature of synthesizing “marennine”, a blue-green pigment of which the chemical nature still remains unknown. This pigment is responsible for the greening of
Jean-Bernard Pouvreau, Joel Fleurence, Michele Morancais   +2 more
exaly   +2 more sources

Extraction and quantitative analysis of the blue-green pigment “marennine” synthesized by the diatom Haslea ostrearia

Journal of Applied Phycology, 2002
This study reports further information on “mareninne,” awater-soluble blue-green pigment synthesized by the diatom Hasleaostrearia, which is essential to the greening of maturing oysters inFrench production areas. The extraction process is reported, as well aspreliminary characterization of a partially purified marennine extract,including quantitative ...
Jean-Michel Robert, Michèle Morançais, Elisabeth Pradier, Jean-Luc Mouget, Gérard Tremblin   +4 more
openaire   +1 more source

Continuous marennin production by agar-entrapped Haslea ostrearia using a tubular photobioreactor with internal illumination

Applied Microbiology and Biotechnology, 2000
The marine diatom Haslea ostrearia was immobilized in a tubular agar gel layer introduced into a photobioreactor of original design with internal illumination for the continuous synthesis of marennin, a blue-green pigment of biotechnological interest. Marennin was produced for a long-term period (27-43 days) and the volumetric productivity was maximum (
T, Lebeau, P, Gaudin, G A, Junter, L, Mignot, J M, Robert   +4 more
openaire   +2 more sources

IN-VIVO FLUORESCENCE MEASUREMENT OF PHOTOSYNTHESIS OFHASLEA OSTREARIASIMONSEN IN RELATION TO MARENNINE CONTENT

Diatom Research, 1995
Isolates of Haslea ostrearia containing different amounts of marennine have been investigated to elucidate the physiological role of this enigmatic blue pigment. Fluorescence analyses at room temperature and 77K showed that marennine is not involved in light-harvesting for either PS II or PS I. On the other hand, a light-shielding function of marennine
Hendrik Schubert, Gerard Tremblin, Jean-Michel Robert, Sigrid Sagert, Yves Rincé   +4 more
openaire   +1 more source

Preliminary characterisation of the blue-green pigment “marennine” from the marine tychopelagic diatom Haslea ostrearia (Gaillon/Bory) Simonsen

Journal of Applied Phycology, 2006
International audienceHaslea ostrearia is a common marine tychopelagic diatom which has the particularity of synthesizing a blue-green hydrosoluble pigment called “marennine”.
Fabrice Fleury, Jean-Bernard Pouvreau, Joel Fleurence   +2 more
exaly   +1 more source

Antioxidant and Free Radical Scavenging Properties of Marennine, a Blue-Green Polyphenolic Pigment from the DiatomHaslea ostrearia(Gaillon/Bory) Simonsen Responsible for the Natural Greening of Cultured Oysters

Journal of Agricultural and Food Chemistry, 2008
International audienceAmong microalgae, the marine diatom Haslea ostrearia has the distinctive feature of synthesizing and releasing, into the surrounding environment, a blue-green polyphenolic pigment called marennine.
Frédéric Taran, Laurent Dufossé, Jean-Bernard Pouvreau   +2 more
exaly   +2 more sources

Effect of marennine produced by the blue diatom Haslea ostrearia on behavioral, physiological and biochemical traits of juvenile Mytilus edulis and Crassostrea virginica

Aquaculture, 2017
Abstract Haslea ostrearia is a marine diatom that synthesizes and releases marennine, a water-soluble blue-green pigment responsible for the greening of the gills and labial palps of bivalves. The present study evaluated the effect of different marennine concentrations (0, 0.5, 1.0 and 2.0 mg l− 1) on the behavior (valve opening), physiology ...
Fiddy Semba Prasetiya, Romain Gastineau, Priscilla Decottignies   +2 more
exaly   +2 more sources