Postdoc position IMMM, Le MansR&D engineer position in natural substances chemistry/ biochemistry


Company presentation

« Ouest Valorisation » is a « Société d’Accélération du Transfert de Technologies » or Technology Transfer Office (TTO) created in July 2012 through the government « Programme des Investissements d’Avenir ». Our mission is to add value to the results produced by public research laboratories in Brittany and Pays de la Loire regions, and to provide socio-economic actors with attractive innovation resources. We are working for 26 higher education and research establishments and organisms. SATT Ouest Valorisation is recruiting a R&D engineer in natural substances chemistry/biochemistry.

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A post-doctoral position is open in the frame of the Valdemar program « Valorization of Haslea and marennine ». The marine diatom Haslea ostrearia synthesizes a blue-green pigment, named marennine.

Currently, the only known exploitation of this pigment is the greening of oysters in oyster ponds in Western France. So far, this use has remained empirical because of the difficulty in growing the microalgae in large scale and in marennine chemical structure identification. However, there is a great demand for natural blue pigments.

Valdemar will also benefit from the contribution of the European program H2020 GHaNA (The Genus Haslea, New marine resources for blue biotechnology and Aquaculture) (2017-2021).


The recruited post doc will be paid by SATT Ouest Valorisation and he/she will work at Le Mans University, at the Institut des Molécules et Matériaux du Mans and at the Mer-Molécules-Santé department, in collaboration with an interdisciplinary team composed by chemists, biologists, physicists, and also with foreign colleagues on secondment in France in the framework of the GHaNA project.


Under the responsibility of the maturation project leader of Ouest Valorisation and of the scientific coordinators of the Valdemar project, the recruited engineer will have to complete the determination of the marennine chemical structure and to study its physicochemical properties. To do that, he (or she) will use the recent results about the characterization of the glycosidic backbone and of a patent concerning a new method to obtain marennine by concentration of the Haslea culture supernatant.



Main activities

- complete the study of marennine chemical structure and identify the nature of the chromophore and its bond to the glycosidic backbone. The work will be carried out on the entire molecule and on the fragments obtained by chemical and enzymatic hydrolysis

- study of marennine physico-chemical properties (colorimetric properties, stability in formulations) in view of the applications in the food and cosmetic industries

- other species of blue Haslea have been recently discovered so the characterization would be also carried out on their pigments to make comparison and draw conclusions.



Candidate profile - Diplomas – Experience


- PhD in chemistry or biochemistry

- experience in extraction, purification and identification of natural compounds, preferably macromolecules

- familiarity with chromatography (HPLC) and Nuclear Magnetic Resonance analytical techniques

- autonomous, independent, proactive

- able to perform team work, to exploit the results by writing papers, reports and in oral presentations.


Contract - Location

18-months fixed-term contract


Institut des Molécules et Matériaux du Mans (IMMM, UMR CNRS 6283) and Laboratoire Mer-Molécules-Santé (MMS, EA 2160), Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans cedex 9, France


Scientific coordinators contact information for applications:



Prof. Jean-Luc Mouget

e-mail: jean-luc.mouget(at)

téléphone: +33 (0)2 43 83 32 42



Dr. Pamela Pasetto

e-mail: pamela.pasetto(at)

téléphone: +33 (0)2 43 83 33 35





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