Influência do incremento protéico e energético da dieta no ganho de peso e deposição de gordura visceral em juvenis de surubins híbridos (Pseudoplatystoma sp).

O objetivo deste trabalho foi avaliar a influência da composição das dietas, formuladas para manter a relação 100 entre a fração energia bruta (EB) e proteína bruta (PB), visando atingir um balanceamento que atenda tanto as exigências nutricionais da espécie como as demandas econômicas e ambientais para os sistemas de produção aquicola

Expected selection gain for resin-yielding in progenies test of Pinus caribaea var. bahamensis.

Abstract. IUFRO Working Group 2.02.20

The effect of medium composition on interleukin-2 production by murine EL-4 thymoma cells

Due to the role of interleukin-2 (IL-2) in the mediation of immune response, this cytokine has been used in the treatment of some types of cancer and infectious diseases. However, relatively high levels of this cytokine are required to achieve significant activity. The aim of this work was to study a culture medium composition designed to increase the production of IL-2 by suspended murine EL-4 cells. The cultivations were carried out aiming at producing IL-2 in stirred bioreactors. The effects of concentration of glutamine, phorbol-12-myristate-13-acetate (PMA), concanavalin A (Con A), Pluronic F68, and fetal calf serum (FCS) on cell viability and IL-2 production were evaluated. PMA alone was more efficient in IL-2 production than it was in association with Con A. The maximum IL-2 production was around 162 ng/mL with 856 ng/mL PMA and 1.45% (v/v) FCS.16517

Estado nutricional e teor de glicosídeos cianogênicos em plantas de seringueira.

A presença de altos teores de glicosídeos cianogênicos pode predispor a planta ao secamento de painel. O objetivo deste trabalho foi verificar a influência do estado nutricional na formação dos glicosídeos cianogênicos na seringueira, utilizando dois experimentos: a) jardim clonal com copa de híbridos de Hevea pauciflora e H. guianensis var. marginata (CPAA C 01) e de H. rigidifolia (CPAA C 81); e b) viveiro com H. brasiliensis. No jardim clonal foram coletadas ao acaso, folhas de 23 plantas, enquanto no viveiro, foi realizado experimento em delineamento inteiramente casualisado com cinco repetições, com tratamentos em esquema fatorial 2 x 4, com duas doses de nitrogênio - N (0,8 e 1,6%, fonte: uréia) e quatro de manganês - Mn (0, 10, 50 e 100 mg kg-1). Na seringueira, independentemente da idade e da espécie de Hevea, os teores foliares de N, Mn e clorofila tiveram correlação positiva com o HCNp das folhas novas e diagnóstico, podendo assim serem utilizados em futuros processos de seleção. Em concentrações baixas de N (0,8%), as doses de Mn influenciaram a absorção de N, P, K, Ca, S, Fe e Mn pelas plantas de seringueira (Hevea brasiliensis), na fase de viveiro. Nutritional status and glycoside cyanogenic concentration in rubber tree plants. The presence of high cyanogenic glycosides concentrations may predispose plant to the tapping panel dryness (TPD). The aim of this work was to evaluate the effect of nutritional status in formation of cyanogenic glycosides in rubber tree. Two experiments were carried out: a) clonal nursery with crow clones hybrids of Hevea pauciflora x H. guianensis var. Marginata (CPAA C 01) and H. rigidifolia (CPAA C 81); and b) nursery with H. brasiliensis. In clonal nursery, twenty three foliar samples were collected, while in nursery, the experiment was carried out using a completely randomized design in factorial scheme 2 x 4 with five replicates. Two nitrogen doses (0.8 and 1.6%, urea as source) and four manganese doses (0, 10, 50 and 100 mg kg-1, MnSO4 as source) were used. Regardless of age and species of Hevea, only the N, chlorophyll and Mn concentrations showed relationship with the HCNp in young leaves. These variables should be used in future selection processes. At low N (0.8%) concentration, the Mn doses influenced the N, P, K, Ca, S, Fe and Mn uptake by rubber tree (Hevea brasiliensis) in the nursery condition

The pasta phase within density dependent hadronic models

In the present paper we investigate the onset of the pasta phase with different parametrisations of the density dependent hadronic model and compare the results with one of the usual parametrisation of the non-linear Walecka model. The influence of the scalar-isovector virtual delta meson is shown. At zero temperature two different methods are used, one based on coexistent phases and the other on the Thomas-Fermi approximation. At finite temperature only the coexistence phases method is used. npe matter with fixed proton fractions and in beta-equilibrium are studied. We compare our results with restrictions imposed on the the values of the density and pressure at the inner edge of the crust, obtained from observations of the Vela pulsar and recent isospin diffusion data from heavy-ion reactions, and with predictions from spinodal calculations.Comment: 15 pages, 11 figures and 7 table