Extraction and chromatographic separation of the extracts of dried stem barks of Glycosmis macrantha lead to isolation of two new acridone alkaloids, macranthanine and 7-hydroxynoracronycine, and a known acridone, atalaphyllidine. The structures of these alkaloids were determined by detailed spectral analysis and also by comparison with reported data.

Little is known about how exotics influence the ecophysiology of co-occurring native plants or how invader impact on plant physiology may be mediated by community diversity or resource levels. We measured the effect of the widespread invasive forb spotted knapweed (Centaurea maculosa) on leaf traits (leaf dry matter content, specific leaf area, leaf nitrogen percentage, leaf C:N ratios, and del...

A specimen of Agapetes from Myanmar is described and illustrated as grandiflora Hook.f., a result comparison with A. burmanica W.E.Evans, macrantha (Hook.) Hook.f. variegata (Roxb.) D.Don ex G.Don. This species has extrafloral nectaries on the margins young leaves at apex calyx lobes.

The different responses of plant species to resource stress are keys to understand the dynamics of plant community in a changing environment. To test the hypothesis that nitrogen (N) increase would benefit N competitive species, rather than N stress-tolerant species, to compete with neighbours, we conducted an experiment with neighbour removal, N addition and soil moisture as treatments in an a...

We consider the radial quantization of N = 4 super Yang-Mills (SYM) in 4 dimensions, i.e., N = 4 SYM on a cylinder R × S 3. We construct the generators of superconformal symmetry in the case of U (N) gauge group, generalizing the earlier work by Nicolai et al. for U (1) gauge group. We study how these generators contract to the symmetry of pp-wave when they act on a state with large R-charge.

HIGHLIGHTS Essential oil contents of T. spicata, L. X Intermedia, S. macrantha and R. officinalis was determined. The main components these plants were monoterpenoid spicata showed strong effects against three microorganisms.

Stachys, Lamiaceae familyasının en geniş yayılış gösteren cinslerinden birisidir. Bu cinse ait türler biyolojik aktiviteleri ve etnomedikal kullanımları ile bilinmektedir. çalışmada, Stachys macrantha’nın toprak üstü kısımlarının farklı çözücülerle (etanol, metanol etil asetat) elde edilen ekstraktlarının toplam fenolik flavonoid içeriği antioksidan (ABTS, DPPH) enzim inhibisyon (α-amilaz, α-gl...