-During the Ordovician Radiation, domination of benthic marine communities shifted away from trilobites, toward articulate brachiopods, and, to a lesser degree, toward bivalves and gastropods. In this paper, we identify the patterns in origination and extinction probabilities that gave rise to these transitions. Using methods adapted from capture-mark-recapture (CMR) population studies, we esti...

The dried extracts of aerial parts of Celesia coromandeliane Vahl. (Scrophulariaceae) were evaluated for CNS activities in mice. The methanol extract of aerial part of Celesia coromandeliane (MECC) was found to cause significant depression in general as well as exploratory behavioral profiles in mice. MECC showed reduction in muscle relaxant activity by 30 degrees inclined screen test, as well ...

This study aimed to evaluate the leishmanicidal activity of ethanol extract, fractions, and isolated substance from Handroanthus serratifolius against Leishmania amazonensis. Furthermore, this activity was related to cytotoxicity, and the selectivity index was determined. The ethanol extract was obtained by maceration of the stem powder, and the extract was subjected to fractionation on chromat...

Phytochemical investigation of Ficus hirta Vahl. (Moraceae) fruits led to isolate two carboline alkaloids (1 and 2), five sesquiterpenoids/norsesquiterpenoids (3-7), three flavonoids (8-10), and one phenylpropane-1,2-diol (11). Their structures were elucidated by the analysis of their 1D and 2D NMR, and HR-ESI-MS data. All of the isolates were isolated from this species for the first time, whil...

The alkaloid composition of Convolvulus lanatus was investigated by GLC and GLC-MS. Altogether, thirteen tropane and pyrrolidine alkaloids were identified on the basis of mass spectral data and/or Kovats retention indices. Twelve of them have been recorded for the first time in this plant and some of these alkaloids were identified for the first time in the genus Convolvulus. Cuscohygrine is th...

Quantitative data of community structure and the current status of ecologically and economically important Drosera burmanii Vahl. Populations were gathered at Tripura, India, from two different stands, Suryamaninagar (Site i) and Ishanchandranagar (Site ii). The area of occupancy of Drosera in both sites was measured. A total of 31 species (26 genera of 18 families) were recorded to be associat...

O presente trabalho descreve a elucidação estrutural de uma nova β-lapachona tipo naftoquinona, isolada a partir das raízes de Distictella elongata. A nova substância, apresentando fórmula molecular C 16 H 16 O 6 , foi identificada como sendo 4,7-diidróxi-10-metóxi-2,2-dimetil3,4-diidro-2H-benzo[h]cromeno-5,6-diona, de acordo com os dados obtidos por meio de análises espectrométricas. A elucida...

There is already a literature report on the anti-ulcer effect of water extract of Ficus exasperata. Some communities in Edo and Delta States of Nigeria use the decoction of the leaf as hypotensive crude drug. Verification of this claim and also the microscopy and other pharmacognostic parameters which can be used to establish the identity of the leaf were carried out. The microscopy of the leaf...