Measurements of CO(2) exchange at varying O(2) concentrations in seven grass species of the Laxa group of Panicum and activities of five photosynthetic enzymes were compared to values obtained for these characters in a cool season C(3) grass, tall fescue (Festuca arundinacea Schreb.) and a C(4) grass, P. maximum Jacq. Plants were divided into three groups on the basis of the inhibition of appar...

The medicinal plant Barleria gibsoni Dalz, family Apocynaceae, is a well-known traditional used in various system of medicines. It spread all over India. present study provides antioxidant capacity aqueous and ethanolic root extracts 2,2'-diphenyl-1-picrylhydrazyl (DPPH), nitrous oxide hydrogen peroxide scavenger assays were used.

Two phenylethanoid glycosides, parvifloroside A (1) and parvifloroside B (2) have been isolated for the first time from the MeOH extract of Barleria strigosa growing in Thailand. The structures of these compounds were elucidated from their 1D and 2D NMR spectroscopic data and ESI-MS.

The present study aimed at evaluating the composition, diversity and short-term temporal fluctuations of zooplankton communities in fish ponds. The study was carried out in two fish ponds, with 180 m(2) of water surface (6 x 30 m) each, located in the Aquiculture Centre of the Pindamonhangaba Fisheries Institute - São Paulo. The study was developed over eight weeks, from February 16 to April 6,...

BACKGROUND One clade of Malagasy leaf chameleons, the Brookesia minima group, is known to contain species that rank among the smallest amniotes in the world. We report on a previously unrecognized radiation of these miniaturized lizards comprising four new species described herein. METHODOLOGY/PRINCIPAL FINDINGS The newly discovered species appear to be restricted to single, mostly karstic, l...