[V. The phenolics of strawberries and their changes during development and ripeness of the fruits (author's transl)].
16 strawberry varieties contained ca. 10--70 mg (+)-catechin per kg freshweight, frequently up to 10 mg (-)-epicatechin, seldom (+)-gallocatechin and never (-)-epigallocatechin. The phenolic contents after hydrolysis were up to ca. 10 mg caffeic acid, ca. 10--15 mg p-coumaric acid, ca. 10--35 mg 4-hydroxybenzoic acid, up to 6 mg protocatechuic acid and ca. 10--40 mg gallic acid per 1000 g freshweight. From "Senga Sengana" ca. 10 mg/kg methyl gallate and ellagic acid were isolated. Salicylic acid, gentisic acid and vanillic acid were found in traces (1 mg/kg). The concentrations of all the examined phenolic acids, relating to the whole fruit (mg per fruit) increased, and, relating to fresh weight (mg per kg) decreased during the growth of the fruits with exception of 4-hydroxybenzoic acid. This acid appeared only in a relatively late stage of the fruit. The changes in catechins were similar. In the ripe fruit the catechin level was reduced a little.
D001578:Benzopyrans / Q000032:analysis; D002109:Caffeic Acids / Q000032:analysis; D003373:Coumaric Acids / Q000032:analysis; D004610:Ellagic Acid / Q000032:analysis; D005638:Fruit / Q000032:analysis*; D005707:Gallic Acid / Q000032:analysis; D005841:Gentisates / Q000032:analysis; D006868:Hydrolysis; D062385:Hydroxybenzoates / Q000032:analysis; D010636:Phenols / Q000032:analysis*; D012459:Salicylates / Q000032:analysis; D014641:Vanillic Acid / Q000032:analysis
D001578:Benzopyrans; D002109:Caffeic Acids; D003373:Coumaric Acids; D005841:Gentisates; D062385:Hydroxybenzoates; D010636:Phenols; D012459:Salicylates; D004610:Ellagic Acid; D005707:Gallic Acid; D014641:Vanillic Acid
Die phenolischen Inhaltsstoffe des Obstes. V. Die phenolischen Inhaltsstoffe der Erdbeeren und deren Veränderungen während Wachstum und Reife der Früchte.