Two new grayanoids, rhodomollin A (1) and rhodomollin B (2), possessing an unprecedented D-homo grayanane carbon skeleton, were isolated from the fruits of Rhododendron molle. The structures of 1 and 2 were fully characterized using a combination of spectroscopic analyses and X-ray crystallography. Rhodomollin B (2) exhibited modest activity against influenza virus A/95-359, with an IC50 value ...

Hybridization has become a focal topic in evolutionary biology, and many taxonomists are aware that the process occurs more frequently than previously assumed. Nonetheless many species and varieties are still described without explicitly considering the possibility of hybridization, especially in countries that have relatively short scientific histories, but which often possess the highest spec...

African leaves (Vernonia amygdalina Del) is a plant that can be used as medicinal because it contains flavonoid compounds are effective natural antioxidants suppress free radicals. The purpose of this study was to determine the antioxidant activity purified extract Vernonia Del. Antioxidant test Del against 1,1-diphenyl-2-picrylhydrazil (DPPH) measured with UV-Vis spectrophotometer at wavelengt...

Aim to develop a methodology for qualitative and quantitative analysis of flavonoids in the herb Achillea millefolium L.
 Material methods. The material study was yarrow harvested 2020 2021, an industrial sample from JSC "Krasnogorskleksredstva". Additionally, we used reference samples flavonoids: rutin, quercetin, kaempferol, cynaroside, luteolin, received previously during our studies ra...

Rhododendrons are some of the most attractive flowering shrubs in landscape. The article presents results studying common problems Rhododendron collection Central Botanical Garden National Academy Sciences Belarus, conducted 2012-2020. There several diseases and pests that commonly occur on rhododendrons every year. These include powdery mildew ( Erysiphe azaleae ), fungal leaf spots Pestalotio...

Wide hybridization can lead to recombination of diverse traits and creation of unique phenotypes, but the resultant hybrids are often sterile as is the case with the intersubgeneric hybrid Rhododendron L. Fragrant Affinity . Sterility in wide hybrids can either be genic or chromosomal; the latter may be overcome by induction of polyploidy, which can restore chromosome homology and fertility. Cy...