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Evaluation of the degree of synergy between fractions of essential oils of Cymbopogon citratus, Ocimum gratissimum and Thymus vulgaris against Penicillium expansum

Ousman TAMGUE student laureate

°1979 Cameroon
Master of Biochemistry, 2004

Evaluation du degré de synergie entre les fractions des huiles essentielles de Cymbopogon citratus, Ocimum gratissimum et Thymus vulgaris contre Penicillium expansum

Mr Ousman Tamgue has submitted a thesis in which he puts forward the use of mixtures of fractions of essential oils to prevent rotting in many fruits and vegetables and in particular apples infected with the Penicillium expansum. This fungus, moreover, produces patulin, a mycotoxin that is particularly harmful to human and animal health.
The originality of this study lies in that he uses common plants as a source of active substances and then observes a greater fungicidal activity in the fractions that contain oxygenated terpenes. The study also shows - and therein lies its great originality - that the fractions that have weak or strong antifungal activity can, if judiciously mixed, generate products whose activity is strongly increased. In other cases, the mixture of fractions (even the most active) can lead to negative effects.
In addition, the products preserve the original organoleptic properties in the fruit and vegetables that have been protected in this way.
The research has been extremely well carried out and the most modern methods of analysis have been judiciously implemented.

report: Prof. A. Krief, Laboratory of Synthetic Organic Chemistry, Faculté Notre-Dame de la Paix, Namur, Belgium