the present study was designed to explore the flavonoid contents and the radical scavenging activities of 50% ethanol extracts of leaves, stems, rachis and roots of dryopteris erythrosora. the total flavonoid contents in various parts were determined as: stems > roots > rachis > leaves. all extracts from different parts of d. erythrosora showed strong bioactivities. the dpph free radical scaven...

En este estudio se provee la primera evidencia de comunicación acústica Podocnemis lewyana presentando los resultados grabaciones realizadas a individuos que estaban próximos eclosionar y post eclosionados hasta dos meses edad una especie endémica Colombia. Se encontró un repertorio vocal conformado por 7 tipos sonidos varían pulsos con bandas armónicas no armónicas, tonos simples agudos, frecu...

In this paper, we introduce a notion of unistructural cluster algebras, for which the set of cluster variables uniquely determines the clusters. We prove that cluster algebras of Dynkin type and cluster algebras of rank 2 are unistructural, then prove that if A is unistructural or of Euclidean type, then f : A → A is a cluster automorphism if and only if f is an automorphism of the ambient fiel...

This study presents the results of phytosociological analyses ash-alder swamps found in Nyirseg, NE Hungary. These host a number locally or regionally rare species, such as Urtica kioviensis, Thelypteris palustris, Hottonia Dryopteris carthusiana, Listera ovata, and Oenanthe banatica. Based on their characteristics, these are identified with Pannonian ashalder (Fraxino pannonicae-Alnetum glutin...