The accurate habitat suitability evaluation of forest species is vital for resource management and conservation. Therefore, the previously published thresholds soil organic carbon (SOC) contents six main were used to screen sample points in this study; maximum entropy modeling (MaxEnt) was applied predict potential distribution those Lvliang Mountain, Shanxi Province, China. following results d...

BACKGROUND AND AIMS Betula L. (birch) is a genus of approx. 60 species, subspecies or varieties with a wide distribution in the northern hemisphere, of ecological and economic importance. A new classification of Betula has recently been proposed based on morphological characters. This classification differs somewhat from previously published molecular phylogenies, which may be due to factors su...

Betulin and its derivatives (especially betulinic acid) are known to possess very interesting prospects for their application in medicine, cosmetics and as bioactive agents in pharmaceutical industry. Usually betulin is obtained by extraction from the outer layer of a birch bark. In this work we describe a simple method of betulin isolation from bark of various species of Betulaceae trees and p...