Search results for "Sideritis"
showing 10 items of 35 documents
Eine neue Art der Gattung Sideritis L. (Lamiaceae) aus Spanien
1992
Aus der spanischen Flora wird eine neue Art der Gattung Sideritis L. beschrieben. A description is given of a new species of the genus Sideritis L. for the Spanish Flora.
Eubotriol and eubol, new diterpenes fromSideritis euboea
1977
2 new diterpenes Eubotriol (ent-kaur-16-ene-7α, 15β, 18triol) (I), and eubol (ent-kaur-16-ene-7α-acetoxy-15β, 18 diol) (II) have been isolated from Sideritis euboea Helder.
Anti-HIV Agents Derived from the ent-Kaurane Diterpenoid Linearol
2002
Twenty-six semisynthetic ent-kaurane derivatives of linearol (1) have been investigated for their anti-HIV effects. Five compounds (4, 7, 11, 25, and 26) showed significant activity against HIV replication in H9 lymphocyte cells with EC(50) values in the range <0.1-3.11 microg/mL. With TI values of 163 and 184, compounds 4 and 25 are especially promising for further development as potential anti-HIV agents.
Flavone Glycosides of Sideritis incana
1986
Ucriol, an epoxy-diterpene from Sideritis syriaca
1983
Abstract The isolation of a new epoxy-diterpene from the inflorescence of Sideritis syriaca (S. sicula Ucria) is described. Its structure and stereochemistry were established by spectroscopy and partial synthesis.
Chromosome numbers of severalLamiaceae from Spain
1998
Chromosome numbers of twenty taxa, almost all of them Iberian endemics, of the generaTeucrium, Sideritis, Thymus andSalvia are reported. New chromosome numbers are given for the following taxa:Teucrium homotrichum (2n=78),T. hifacense (2n=26),T. rivasii (2n=26),T. rivas-martinezii (2n=26),Sideritis edetana (2n=30),S. murgetana subsp.littoralis (2n=28), and the hybridS. xviciosoi (2n=27). The first count on Iberian material forSalvia pratensis (2n=18) is reported. Chromosome numbers have been confirmed for the rest of the taxa studied on material from SE Spain. Karyotype analyses and taxonomic remarks are included.
Volatile compounds of flowers and leaves of Sideritis italica (Miller)Greuter et Burdet (Lamiaceae), a plant used as mountain tea
2010
Sideritis italica (Miller) Greuter et Burdet (Lamiaceae), widely used in ethnopharmacological medicine, occurs in Southern Italy and Sicily. The phytochemical composition of the essential oils of S. italica flowers and leaves, harvested in Piano Battaglia (Sicily), was analysed by GC and GC-MS. Of the 51 compounds, 43 in the oil from flowers and 29 in the oil from leaves were identified. Kaur-15-ene (20.0%) was recognised as the main constituent of the oil from flowers, together with beta-cubebene (12.1%), beta-pinene (8.5%), (Z)-nuciferol (6.5%), tricyclene (4.5%) and alpha-bisabolol (4.0%). In the oil from leaves, p-methoxyacetophenone (26.0%) prevailed, as did hexadecanoic acid (21.3%), …
Isolation, culture and plant regeneration from protoplasts of Sideritis angustifolia
1998
Summary Factors promoting high yields of viable protoplasts from leaves of Sideritis angustifolia are reported. Isolated protoplasts divided and gave rise to callus when plated in modified liquid MS medium with growth regulators. Best plating efficiency was obtained when protoplast were cultured in the presence of 6 μM BA and 2 μM NAA. Calli were then transferred onto solidified regeneration media. Adventitious bud differentiation was only observed in calli grown on medium containing 8 μM BA and 2 μM NAA. These buds proliferated quickly when placed on hormone-free medium and subsequendy regenerated new buds and shoots. Once developed shoots were excised, the remaining tissues maintained thi…
Studies on the gastric anti-ulcer activity of hypolaetin-8-glucoside
1988
The gastric anti-ulcer activity of hypolaetin-8-O-β-D-glucoside (H-8-G), a flavonoid isolated from Sideritis leucantha, has been studied in rats. This compound significantly reduced gastric lesions induced by ethanol or acetylsalicylic acid (ASA), with an increase in mucus production. In the pylorus-ligated rat, H-8-G did not affect the volume of gastric secretion but decreased its acidity and peptic activity. The anti-ulcer activity of this flavonoid does not depend on stimulation of cell proliferation in the rat gastric mucosa. Our results suggest that H-8-G activity is related to its cytoprotective effects [mediated by endogenous prostaglandins (PGs) and associated to an increase in gast…