the cytotoxic chloroform fraction of euphorbia aellenii afforded two cycloartane type triterpenes — cycloart-25-en-3,24-diol (1) and 24-methylene-cycloartan-3-ol (2) — for the first time from this plant. preparation of cycloartane derivatives, 3, 24-o-diacetyl-cycloart-25-en as compound 3 and 3-o-acetyl-24-methylene-cycloartan (4) were conducted by acetylating of 1 and 2, respectively. the ...

Studie se zabĂ˝vĂĄ dosud opomĂ­jenou počátečnĂ­ fĂĄzĂ­ politickĂŠ kariĂŠry přednĂ­ho komunistickĂŠho funkcionáře MiloĹĄe JakeĹĄe (1922–2020), kterĂ˝ později po porĂĄĹžce praĹžskĂŠho jara stal členem novĂŠho, normalizačnĂ­ho vedenĂ­ KomunistickĂŠ strany Československa a v letech 1987 aĹž 1989 stanul jejĂ­m čele jako generĂĄlnĂ­ tajemnĂ­k. Tato etapa je spjata s jeho pĹŻsobenĂ­m...

The hawthorn fruits have been used as food and medicine for centuries. In the present study, pulp and seed extract of Crataegus elbursensis Rech. F. fruits belonging to the family Rosaceae and native of northern part of Iran were evaluated for the polyphenol contents, antiradical, antioxidant, and antibacterial activities. The total phenolic, flavonoid, and anthocyanin contents of methanolic pu...

The aerial parts of Stachys laxa Boiss. and Buhse. from Siah-bishe in Mazandaran province, Stachys trinervis Aitch. and Hemsl. from Karaj in Alborz province, Stachys subaphylla Rech. F. and Stachys turcomanica Trautv. from Golestan province have been collected in May 2008. Total extracts were obtained through MeOH/H2O (80/20) and then partitioned between CHCl3, EtOAc and MeOH. These fractions a...

Salvia mirzayanii is member of Lamiaceae family, which distributes only in south of Iran. Phytochemical composition of essential oil isolated by hydro distillation from the aerial parts of Salvia mirzayanii Rech. & Esfand. grown wild and cultivated in Iran were determined using Gas Chromatography (GC) and Gas Chromatography/Mass Spectrometry (GC/MS). Forty nine components were identified in the...

Marked differences exist in the industrial and regional policy regimes adopted in Israel and Ireland. This paper reviews these differences and investigates their influence on the development of the high-tech sector in each area. Using survey data from Irish and Israeli firms we examine the influence of public policy on the characteristics, location and innovation capability of high-tech firms. ...