Nanotec Solution

Compagnie Gervais Danone

Hamilton Bonaduz Ag

Université Montpellier II

Geoffrey Esteban

Frédéric Ossart

Bruno Luong

Philippe Teissier

Charles Ghommidh

Anne-Solenn Arnoux

Jean-Yves Barbeau

Laurence Preziosi-Belloy

A process for on-line and in situ counting of cells in a biological culture medium, including a plurality of steps of measuring the capacitance of the medium or a plurality of steps of measuring the conductance of the medium, at distinct frequencies varying within a predetermined range of measurement frequencies. The process includes an extraction of information on the variation of permittivity due to the &#x3b2;-dispersion in the medium, from the capacitance measurements, and processing of the variation of this information on the variation of permittivity as a function of the frequency, in order to provide information regarding the counting of cells in the medium.

Process and system for on-line and in situ counting of cells in a biological culture medium

Method for biomass determination in a medium, in particular a medium containing biological cells suspended in a conductive fluid, the biomass concentration (X) being obtained from a difference between a first capacitance signal (C') of the medium, measured at a first frequency, and a second capacitance signal (C&#x2032;) of the medium, measured at a second frequency. The method includes a separate correction of each of the measured signals, based at least on one correction level, the first correction level including a correction of the signals measured in accordance with a model dependent on the conductance of the medium at the first and second frequencies. The invention is useful in biomass measurement systems.

Method and device for biomass determination in a medium, in particular a medium containing biological cells, and measurement apparatus implementing same

Growing community of inventors

Nimes, France

Geoffrey Esteban