Institut Pasteur

Societe a Responsabilite Limitee Dite: 'korano'

Marie-Jose Brochon

Michel Robert Popoff

Georges Brault

Anne-France Corot

A flake-powder preparation of a polygalactan having randomly interlaced chains of alternating D and L forms and bonded to fine grain aluminum oxide, silicon oxide and titanium oxide disposed throughout the powder and chemically bonded to the chains to form chemical complexes therewith, is used as a substitute for agar-agar as a culture medium. The powder is soluble in water upon heating to a temperature of 80.degree. C. and forms a reversible gel upon cooling.

Gel-forming semisynthetic polygalactan metallic oxide complex

The invention relates to a device and a method for carrying out simultaneously multiple analyses in a liquid medium. The device comprises a compartment for introducing liquid, communicating through a distribution channel with separate analysis compartments. Each analysis compartment is provided with valve-forming means, such as a ball, isolating the liquid contained in the analysis compartment from the liquid remaining in the distribution channel. The device is particularly suitable for microbiological analyses.

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Fontenay sous Bois, France

Marie-Jose Brochon