Results 31 to 40 of about 4,870 (138)

Variações circadianas em Spilotes pullatus (Colubridae)

Biotemas, 2006
Foi determinado para Spilotes pullatus (Serpentes, Colubridae) o ritmo circa  diano da freqüência cardíaca, dos intervalos RR e QT no eletrocardio grama  em condições de ciclo normal (dia/claro e noite/escuro), durante a prima vera.
José Geraldo Pereira da Cruz, Ayrton Adão Schmitt Júnior, Marcelo Reinert   +2 more
doaj  

Beta-lactams susceptibility testing of penicillin-resistant, ampicillin-susceptible Enterococcus faecalis isolates: a comparative assessment of Etest and disk diffusion methods against broth dilution

Annals of Clinical Microbiology and Antimicrobials, 2020
This study aimed to evaluate the accuracy of disk diffusion and Etest methods, compared to that of the broth dilution reference method for identifying beta-lactam susceptibilities of Penicillin-Resistant, Ampicillin-Susceptible Enterococcus faecalis ...
Natália Conceição, Wellington Francisco Rodrigues, Kessys Lorrânya Peralta de Oliveira, Lucas Emanuel Pinheiro da Silva, Laís Rezende Cardoso de Souza, Cristina da de Cunha Hueb Barata Oliveira, Adriana Gonçalves de Oliveira   +6 more
doaj   +1 more source

Saberes científicos e pedagógicos de conteúdo em Ciências Naturais nos anos iniciais do ensino fundamental em Cuiabá - MT

Revista de Educação Pública, 2021
Este trabalho é um recorte de uma pesquisa de mestrado e busca compreender e relatar a experiência de pedagogos, ao trabalharem com a disciplina de Ciências Naturais, nos anos iniciais do Ensino Fundamental.
Zélia Alves dos SANTOS, Marcel Thiago Damasceno RIBEIRO   +1 more
doaj   +1 more source

The value of regeneration for insect fauna associated with leaf litter in the Brazilian savanna: A comparative study of biomass and trophic structure

Annals of Applied Biology, EarlyView.
This study demonstrates the ecological value of natural regeneration in the Brazilian Cerrado by analysing the biomass, richness and trophic structure of leaf litter insects across pasture (P), regenerating (R) and native (N) areas. We found that R areas supported insect communities more similar to N habitats than to Ps, with higher richness, greater ...
Thalita Moraes Miranda Ribeiro de Souza, Rodrigo Aranda   +1 more
wiley   +1 more source

Stable Isotope Analysis as a Tool to Prevent Illicit Wildlife Trade of Songbirds in Brazil

Animal Conservation, EarlyView.
Feather isotopes provide clear differences between wild and captive songbirds in Brazil. Combining multiple isotopes improved classification accuracy and revealed individuals falsely declared as captive‐bred. These results demonstrate the potential of isotope analysis to detect wildlife laundering in the bird trade.
Luiza Brasileiro, Fábio J. V. Costa, Paulo R. R. Ramos, Vladimir E. Costa, Gabriela B. Nardoto   +4 more
wiley   +1 more source

Seasonality and hydrodistillation time effects on the yield and chemical composition of leaves essential oil of Piper mikanianum (Kunth) Steudel

Eclética Química, 2018
Piper mikanianum from Santa Catarina, southern Brazil, is a well known source of safrole, an arylpropanoid precursor of several bioactive molecules. This work determined the seasonal and hydrodistillation time influence on the essential oil (EO) yield ...
Sabrina M. Clemes, Thalita G. Santos, Ricardo A. Rebelo, Rudi R. Laps, Rosete Pescador   +4 more
doaj   +1 more source

Linking rivers, mixing faunas: How artificial connectivity between the Middle and Upper Paraná River basins shapes fish diversity in a tributary of the Itaipu Reservoir, Brazil

Journal of Fish Biology, EarlyView.
Abstract This work aimed to investigate the distribution and occurrence of fish species along the São Francisco Falso Braço Norte (SFFBN) River basin, a tributary of the Middle Paraná River basin now artificially connected to the Upper Paraná ecoregion, to evaluate how such connectivity may affect the biogeographic distribution and regional composition
Lucas E. P. Kampfert, João C. Maicrovicz, Daniel R. Blanco, Denise Lange, Carla S. Pavanelli, Heleno Brandão   +5 more
wiley   +1 more source

Natural quark mixing and inverse seesaw in a left-right model with an axion

Journal of High Energy Physics, 2019
We consider a minimal left-right model with a Peccei-Quinn symmetry, where generalised charge conjugation plays the role of the left-right symmetry. We show how the spontaneous breaking of the Peccei-Quinn symmetry by a scalar singlet can provide us with
Alex G. Dias, Julio Leite
doaj   +1 more source

Feeding ecology of an Amazonian electric knifefish under altered flood‐pulse dynamics caused by hydroelectric damming

Journal of Fish Biology, EarlyView.
Abstract This study evaluated the effects of the controlled flood pulse on diet composition, trophic niche breadth and feeding intensity of Archolaemus janeae, an electric knifefish species with a restricted distribution in the Amazon Basin. Monthly samples were collected from December 2020 to November 2021 in the Volta Grande stretch of the Xingu ...
Ana F. V. N. M. Costa, Antonio A. Jardim Jr, Erival G. Prata, Rafael R. Gusmão, Angelo J. Faro Júnior, Alan S. Fonseca, Danielly T. Hashiguti, Luciano F. A. Montag, Tiago M. S. Freitas   +8 more
wiley   +1 more source

Toxicity and antitumor potential of Mesosphaerum sidifolium (Lamiaceae) oil and fenchone, its major component

BMC Complementary and Alternative Medicine, 2017
Background The essential oil from Mesosphaerum sidifolium (L’Hérit.) Harley & J.F.B.Pastore (syn. Hyptis umbrosa), Lamiaceae (EOM), and its major component, have been tested for toxicity and antitumor activity.
Thaísa Leite Rolim, Déborah Ribeiro Pessoa Meireles, Tatianne Mota Batista, Tatyanna Kelvia Gomes de Sousa, Vivianne Mendes Mangueira, Renata Albuquerque de Abrantes, João Carlos Lima Rodrigues Pita, Aline Lira Xavier, Vicente Carlos Oliveira Costa, Leônia Maria Batista, Marcelo Sobral da Silva, Marianna Vieira Sobral   +11 more
doaj   +1 more source