3019304 documents found, page 16829 of 301931
Abundance and instantaneous transport of Petrolisthes armatus (Gibbes, 1850) pl...
Melo Júnior,Mauro de; Schwamborn,Ralf; Neumann-Leitão,Sigrid; Paranaguá,Maryse N.The influence of tidal and diel changes on the exchange of Petrolisthes armatus planktonic larvae was studied at the Catuama inlet, which represents an intermediate system of marine and estuarine environments in the Northeast Brazil. To characterize the larval abundance and vertical distribution, samplings were carried out in August 2001 at neap tide and 3 stations, with 3 hours interval over 24 hours. Samples ...
Assessment of Duguetia furfuracea genotoxic and cytotoxic activity in bacteria ...
Silva,Carolina R.; Vieira,Pabline M.; Santos,Suzana C.; Chen-Chen,LeeDuguetia furfuracea (St. Hil.) Benth & Hook f. (1862), popularly known as "sofre-do-rim-quem-quer" and "araticum-seco", is a shrub of the Annonaceae family that occurs in several regions of Brazil. In folk medicine the infusion of its leaves and twigs is used to treat rheumatism and renal colic, whereas the seed powder is mixed with water to treat pediculosis. Previous studies have described biological acti...
Reproduction and structure of the population of the Chaetognath Parasagitta fri...
Mendes,Fabiana; Figueiredo,Gisela M. de; Valentin,Jean L.The aim of this study was to describe the total density, densities of developmental stages and the reproduction period of Parasagitta friderici. Weekly samples were collected at one station in the channel of Guanabara Bay, Rio de Janeiro, during one year. Three vertical hauls were made for each sample, and P. friderici was separated, the developmental stages were identified, and body length (BL), ovary length (...
Micropropagation, antinociceptive and antioxidant activities of extracts of Ver...
Braga,Virgínia F.; Mendes,Giselle C.; Oliveira,Raphael T.R.; Soares,Carla Q.G.; Resende,Cristiano F.; Pinto,Leandro C.; Santana,Reinaldo deThis work describes an efficient micropropagation protocol for Verbena litoralis and the study of the antinociceptive and antioxidant activities in extracts of this species. For the establishment in vitro, surface-sterilization procedures and PVPP showed high efficiency in fungal-bacterial contamination and phenol oxidation controls. Nodal segments cultivation in MS medium supplemented with 6-benzyladenine (7.5...
Quantification and classification of the main environmental impacts on a Halodu...
Pitanga,Maria Elisa; Montes,Manuel J.F.; Magalhães,Karine M.; Reis,Thiago N.V.Multiple stress mechanisms have caused a worldwide decrease in seagrasses, which are vulnerable to environmental and/or anthropogenic pressure. The loss of seagrass meadows of Halodule wrightii is reported for the littoral of Itamaracá Island (Northeastern Brazil). The present study identified the main anthropogenic factors that negatively influenced over the abundance and distribution of seagrass meadows betwe...
Gastroprotective effect of Byrsonima sericea DC leaf extract against ethanol-in...
Rodrigues,Patrícia A.; Morais,Selene M.; Souza,Carolina M.; Magalhães,Davi V.; Vieira,Ícaro G.P.; Andrade,Geanne M.; Rao,Vietla S.; Santos,Flávia A.Byrsonima sericea leaves are extensively used in folk medicine in Brazil against gastric disorders. This study investigated the chemical constituents of B. sericea leaf ethanolic extract (BSLE) and its potential gastroprotective activity, with its possible mechanism of the action using ethanol to induce gastric mucosal damage in mice. The phytochemical analysis was carried out to identify the active constituent...
Prey selectivity of the octocoral Carijoa riisei at Pernambuco, Brazil
Gomes,Paula B.; Lira,Ana K.F.; Naud,Jean-Philippe; Santos,Andre M.; Pérez,Carlos D.This study was designed to evaluate prey selection (type and size) by the octocoral Carijoa riisei at Porto de Galinhas beach, Northeast Brazil, relating prey availability in plankton with the content inside polyps. Diatoms and cyanophytes were the predominant items found in both polyp gastric cavity and plankton. A correlation between prey abundance in the plankton and in the gastric cavity of C. riisei polyps...
Mining method selection by integrated AHP and PROMETHEE method
Bogdanovic,Dejan; Nikolic,Djordje; Ilic,IvanaSelecting the best mining method among many alternatives is a multicriteria decision making problem. The aim of this paper is to demonstrate the implementation of an integrated approach that employs AHP and PROMETHEE together for selecting the most suitable mining method for the "Coka Marin" underground mine in Serbia. The related problem includes five possible mining methods and eleven criteria to evaluate the...
Effects of light intensity on the distribution of anthocyanins in Kalanchoe bra...
Cruz,Bruna P.; Chedier,Luciana M.; Peixoto,Paulo H.P.; Fabri,Rodrigo L.; Pimenta,Daniel S.This paper compares two medicinal species of Kalanchoe, which are often used interchangeably by the population, regarding the distribution of anthocyanins under the influence of four luminosity levels for 6 months. For the morphoanatomical analysis, the 6th stem node of each plant was sectioned. Usual histochemical tests revealed the presence of anthocyanins by cross sections of the stems, petioles and leaf bla...
Trichomes and hydrocarbons associated with the tomato plant antixenosis to the ...
Fernandes,Maria Elisa S.; Fernandes,Flávio L.; Silva,Derly J.H.; Picanço,Marcelo C.; Jhamc,Gulab N.; Carneiro,Pedro C.; Queiroz,Renan B.The objective of this work was to study the density of trichomes and hydrocarbons associated with the resistance by antixenosis of 42 subsamples of tomato plants from the Horticultural Germplasm Bank of the Universidade Federal de Viçosa (HGB-UFV) to Liriomyza trifolii. These subsamples were studied in addition to 'Santa Clara' cultivar, which was used as a standard of susceptibility to leafminers. The evaluate...