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Salt ooids that form in the solar salt works of Berre (France) are studied principally through SEM imagery. They are compared to halite particles obtained in the laboratory by bacterial mediation under controlled conditions. Salt crystallisation appears to be induced and oriented by the growth of bacterial colonies. The main bacterial processes involved are the multiplication of cells and the regulation...
The ability of the so-called carbonatogenic bacteria may be used for producing surficial protecting coatings (biocalcin) on limestones buildings, monuments and statuary. This is the concept of biomineralisation. Laboratory experiments were undertaken in order to choose the most active bacterial strains and to improve the composition of the nutritional media suitable for stimulating the nitrogen cycle...
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