Abstract
A novel method for evaluating pigment production during fermentation ofMonascus ruber has been developed and consists of reflectance measurement with a 10° observer under an artificial illuminant. A spectrophotometer was adapted to measure pigmentation during culture in a bioreactor. The lightness parameter L was the most useful information delivered by this sensor. An absorbency over 30 units at 480nm on batch cultures was estimated on-line without dilution.
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