Rapid Arctic climate change is leading to woody plant-dominated ecosystems with potential consequences for caribou foraging and nutritional ecology. While warming has been clearly linked shrub expansion, the influence of higher temperatures on variables leaf-level quality forage equivocal. Moreover, results in a complex set ecosystem changes that operate different timescales such as not only ra...

Alkannin/shikonin (±)-5, 8-dihydroxy-2-(1-hydroxy-4-methyl-3-pentenyl)-1,4-naphthoquinone), also known as Shikalkin, is a racemic mixture of naturally occurring isohexenylnaphthazarin compounds. The (S) isomer is called as alkannin and (R) isomer is called as shikonin. Study was undertaken with an objective to develop a method for isolation of shikalkin from roots of Arnebia nobilis Reichb.f. b...

OBJECTIVES The aim of this study was to investigate wound healing effects of Arnebia densiflora (Nordm.) Ledeb. root extracts on rat palatal mucosa. METHODS A 10-mm full-thickness mucosal wounds were created on midline of rats' palate by using scalpel. In the experimental groups, a ten percent extract of A. densiflora roots was topically applied once a day as ointment on the wounds. After wou...

(Leaf contents of nitrogen and phenolic compounds and their bearing with herbivore damage to Tibouchina pulchra Cogn. (Melastomataceae), under the influence of air pollutants from industries of Cubatão, São Paulo). The Atlantic Forest on the slopes of Serra do Mar around Cubatão (São Paulo, Brazil) has been affected by massive emissions of pollutants from the local growing industrial complex. T...

Abstract A suite of processes drive variation in coral populations space and time, yet our understanding how density affects performance is limited. Theory predicts that reductions can send into a predator pit, where concentrated corallivory maintains corals at low densities. In reality, alters rates poorly resolved. Here, we experimentally quantified the effects on growth survival small coloni...

Pterothominx pulchra (Freitas, 1934) are little known gastric nematodes of Nyctinomops laticaudatus (Chiroptera: Molossidae). Information about the occurrence and host range of these parasites in Neotropical region is still scanty, and the only two morphological descriptions available in the literature are divergent about the presence or absence of a spiny spicular sheath in males, which may le...