Three new natural coumarin substances 1, 2 and 3 (derivatives of 2',2'-dimethyl-3',4'-dihydroxydihydropyrano-5',6':6,7-coumarin) were isolated from the roots and fruits of Peucedanum arenarium W.K. On the basis of the spectral data from UV, IR, and NMR spectra of coumarin 1, named peuarenarine, it was assumed, that, it is an ester of 2',2'-dimethyl-3',4'-dihydroxy-dihydropyrano5',6' :6,7-coumar...

Lycium species is a popular medicinal plant in the traditional Chinese medicine and Lycium ruthenicum is a native medicinal plant of Iran. Lycium genus has several biologically important properties too. Investigation of chemical composition of ethyl acetate extract of this plant is the goal of this study. Two coumarins (Scopoletin and Sculetin) and Methyl-2-hydroxy-4-undecanoxy-trans-cinamate w...

With the intensification of desertification in northwest China, drought has become a serious environmental problem restricting plant growth and ecological restoration. Recently, dark septate endophytes (DSEs) have attracted more attention because their ability to improve plants’ resistance drought. Here, we investigated DSE colonization species diversity roots Lycium ruthenicum collected from A...

Several related yellow-flowered houseleek species which occur on the Balkan Peninsula are divided into two complexes: Sempervivum ciliosum (S. ciliosum, S. jakucsii, klepa, octopodes, and galicicum) ruthenicum complex ruthenicum, leucanthum, kindingeri, zeleborii). Due to strong phenotypic plasticity a limited number of studies, it is difficult assert at this point whether all above well define...

The article presents the current state of two pasture varieties types from Anabasis salsa: 1. salsa with Caroxylon orientale, Artemisia terrae-albae, A. kemrudica; 2. terrae-albae and sparse-mixed shrubs (Convolvulus fruticosus, Lycium ruthenicum, brachiata, Nanophyton erinaceum, Nitraria schoberi, Malacocarpus crithmifolius, Xylosalsola chiwensis), single specimens Crambe edentula in Karakalpa...

Praeruptorins belonging to the angular-type pyranocoumarins are bioactive constituents that have been isolated from some Peucedanum species such as P. praeruptorum, which is used in traditional Chinese medicine for treatment of cold, cough, upper respiratory infections, and so forth. Many reports have demonstrated that the beneficial pharmacological effects of P. praeruptorum root on cardiovasc...

Although the copula literature has many instances of bivariate copulas, once more than two variates are correl ated, the choice of copulas often comes down to selection of the degrees-of-freedom parameter in the t-copula. In search for a wider selection of multivariate copulas we review a generalization of the t-copula and some copulas defined by Harry Joe. Generalizing the t-copula gives more ...