27 research outputs found
Conforto tĂ©rmico de bĂșfalas em sistema silvipastoril na AmazĂŽnia Oriental
O objetivo deste trabalho foi avaliar o efeito de um sistema silvipastoril no conforto tĂ©rmico de 20 bĂșfalas Murrah, das quais 10 criadas em piquetes sem sombra (SS) e 10 com sombreamento (CS) de Racosperma mangium, em BelĂ©m, PA. Os animais foram alimentados em pasto, com Urochloa humidicola, com acesso livre Ă ĂĄgua para beber e sal mineral. A cada trĂȘs dias, foram mensuradas: temperatura do ar (TA), umidade relativa do ar (UR), temperatura de globo negro (TGN), temperatura retal (TR), frequĂȘncias respiratĂłria (FR) e cardĂaca (FC), e a temperatura da superfĂcie corporal (TSC), pela manhĂŁ (7h) e Ă tarde (13h). Os valores de TR, TSC, FR e FC foram maiores Ă tarde, especialmente no grupo SS. Mais altas no perĂodo menos chuvoso, a TR, TSC e FR apresentaram correlação linear positiva com a TA e o Ăndice de temperatura e umidade (ITGU) e negativa com a UR. Tanto na estação mais chuvosa quanto na menos chuvosa, a FC apresentou correlaçÔes significativas positivas com a TA e ITGU e negativas com a UR, apenas no perĂodo mais chuvoso. A arborização da pastagem Ă© eficiente para melhorar o conforto tĂ©rmico das bĂșfalas Murrah, principalmente Ă tarde
Outcome of root canal treatment in dogs determined by periapical radiography and cone-beam computed tomography scans
The purpose of this study was to compare the favorable outcome of root canal treatment determined by periapical radiographs (PRs) and cone beam computed tomography (CBCT) scans. Ninety-six roots of dogs' teeth were used to form four groups (n= 24). In group 1, root canal treatments were performed in healthy teeth. Root canals in groups 2 through 4 were infected until apical periodontitis (AP) was radiographically confirmed. Roots with AP were treated by one-visit therapy in group 2, by two-visit therapy in group 3, and left untreated in group 4. The radiolucent area in the PRs and the volume of CBCT-scanned periapical lesions were measured before and 6 months after the treatment. In groups 1, 2, and 3, a favorable outcome (lesions absent or reduced) was shown in 57 (79%) roots using PRs but only in 25 (35%) roots using CBCT scans (p = 0.0001). Unfavorable outcomes occurred more frequently after one-visit therapy than two-visit therapy when determined by CBCT scans (p = 0.023)