Pharmacological activities and biologically active compounds of Bulgarian medicinal plants.
- S. Ivancheva, M. Nikolova, R. Tsvetkova, F. Imperato
- Biology
- 2006
Bulgarian medicinal plants, which have been studied during the last years, are reviewed and main pharmacological properties are antiviral, antimicrobial, antioxidative, anti-inflammatory, antiseptic, spasmolytic, sedative and hypotensive.
Some allometric and non-allometric relationships between chlorophyll-a and abundance variables of phytoplankton
- R. Kalchev, M. Beshkova, C. S. Boumbarova, R. Tsvetkova, D. Sais
- Environmental Science, MathematicsHydrobiologia
- 1 December 1996
The frequently investigated relationship between chlorophyll-a and biovolume ranged from statistically notsignificant in the mesotrophic to highly significant in the eutrophic reservoir, and this tendency was generalized by obtaining a statistically significant rank correlation between the levels of significance of chlorophyLL-biovolumes correlations and the corresponding chlorophyill-a concentrations.
Alkaloids from Sternbergia colchiciflora
- S. Berkov, J. Bastida, R. Tsvetkova, F. Viladomat, C. Codina
- Biology, MedicineZeitschrift für Naturforschung C - A Journal of…
- 1 June 2009
The alkaloid pattern during both periods of leaf development and fructification was dominated by haemanthamine-type in the leaves and lycorine-type compounds in the bulbs, respectively.
Evaluation of antioxidant activity in some Geraniacean species.
- M. Nikolova, R. Tsvetkova, S. Ivancheva
- Chemistry
- 2010
Methanol extracts of nine species of Geraniaceae, namely G. sylvaticum L., G. sanguineum L., G. columbinum L., G. caeruleum Schur, G. pyrenaicum Burn.fi ll, G. lucidum L., G. marcorrhizum L., G.…
Distribution of flavonoid aglycones in tribe Anthemideae (Asteraceae).
- S. Ivancheva, R. Tsvetkova, F. Imperato
- Biology
- 2003
Characterisation of Collagenolytic Enzymes Produced by Thermophylic Actinomycetes
- A. Gousterova, I. Goshev, P. Christov, R. Tsvetkova, P. Nedkov
- Biology
- 1 January 2003
Preliminary experiments show that proteolytic enzymes produced by extremophilic microorganisms in soil samples, collected from different regions in Bulgaria could be applied for pre-treatment of collagen-rich raw materials, e.g. in the pelt industry.
[A method of determining polyether antibiotics].
- R. Rachev, M. Darakchieva, R. Tsvetkova, M. Sakhanekova, L. Stefanova
- MedicineActa microbiologica Bulgarica
- 1985
[Isolation, purification and separation of the antibiotics produced by Streptomyces hygroscopicus IM-110-81 (DIKLS)].
- R. Rachev, M. Darakchieva, M. Sakhanekova, R. Tsvetkova, P. Panaiotov
- BiologyActa microbiologica Bulgarica
- 1985
[Taxonomic studies of Streptomyces hygroscopicus strain IM-110-81 (DIKLS)--producer of a polyether antibiotic complex].
- M. Darakchieva, R. Tsvetkova, R. Gesheva, P. Panaiotov, L. Mikhaĭlova
- EngineeringActa microbiologica Bulgarica
- 1985
[The dissociation of a mutant strain of Streptomyces levoris 41-08, a producer of ichthiomycin].
- K. Popov, I. Ognianov, I. Gameĭska, R. Tsvetkova
- BiologyActa microbiologica Bulgarica
- 1990
The statistical processing of data shows that the oligospore and the asporogene variants with their limits of activity to 121.8 and 119.3% respectively are promising, while the existence of white representatives in the population is not recommended since they are low-active minus variants.