Abstract: The present invention describes a method for treating a biological material, said method comprising exposing the biological material to vacuum impregnation or pressure impregnation, preferably vacuum impregnation, in an aqueous impregnation solution comprising at least one surfactant.

Abstract: The present invention is directed to a cut flower with at least one leaf, wherein the silver content is at least 3.0 mg/kg dry substance in said at least one leaf, preferably at least 5.0 mg/kg dry substance in said at least one leaf, more preferably at least 7.0 mg/kg dry substance in said at least one leaf, more preferably at least 10.0 mg/kg dry substance in said at least one leaf, more preferably at least 15.0 mg/kg dry substance in said at least one leaf, more preferably at least 20.0 mg/kg dry substance in said at least one leaf, more preferably at least 25.0 mg/kg dry substance in said at least one leaf, most preferably at least 30.0 mg/kg dry substance in said at least one leaf.

Abstract: The present invention describes a method for treating one or more cut flowers each including a stem, possibly leaves and a flower bud, said method comprising—arranging one or more cut flowers in an impregnation solution so that at least a portion of the stem of said one or more cut flowers are immersed in the impregnation solution, but where the flower bud is free from impregnation solution; and—applying vacuum impregnation or pressure impregnation, preferably vacuum 10 impregnation, to the impregnation solution when said at least portion of the stem are immersed into the impregnation solution.

Abstract: The present invention describes a method for treating a plant material, said method comprising the following steps: —exposing the plant material to vacuum impregnation in an aqueous solution; —applying a pulsed electrical field (PEF) treatment to the plant material in the aqueous solution before, simultaneously as or after exposing the plant material to vacuum impregnation in an aqueous solution; —applying a drying step to the PEF treated plant material for removing water/moisture from surfaces of the plant material before packing the treated plant material; said method also comprising an active step for preventing microbial contamination of the aqueous solution.