Ação da dopamina na secreção do hormônio do crescimento em novilhas pré-púberes da raça Nelore

The aim of this study was to evaluate the response of dopamine in the growth hormone secretion (GH) during Nellore heifer's sexual maturation. The animals were randomly assigned into two experimental groups: Sulpiride group (dopamine D-2 antagonist, 0.59 mg/kg, S. C.) and control group (saline solution S. C.) at 8, 12 and 16 months of age. Blood samples were collected every 15 min for 10h after drug injection. Growth hormone was quantified by RIA, sensitivity (0.25 ng/mL) and intra and inter-assay variation coefficients were 15% and 17%, respectively. GH concentration was higher in sulpiride group than control group at 8 mo (10.1 +/- 0.38 ng/mL vs 4.3 +/- 0.34 ng/mL; P < 0.05) and 12 mo of age (9.46 +/- 0.35 vs 3.74 +/- 0.19 ng/mL; P < 0.05). In sulpiride group GH average concentration was greater at 8 and 12 mo compared to 16 mo of age (10.10 +/- 0.38 ng/mL and 9.46 +/- 0.35 ng/mL vs 4.87 +/- 0.35 ng/mL; P < 0.05) respectively. There was no difference between groups (P > 0.05) in total GH secretion area, total peak area and maximum peak amplitude. These results suggested an inhibitory dopamine effect on GH secretion in pre-pubertal Nellore heifers that decreases according to age.

Sentidos vermelhos nos anos dourados: uma análise do anticomunismo católico em Londrina no período de 1955 a 1958

This article aims to analyses the anti-Communism in the period between 1955 and 1958 in Londrina, Paraná, from the event march of Production which was reported by Folha de Londrina in 1958. We’ll use as methodological the discourse analysis of French substantiated in studies of Pêcheux (1997) and the mechanisms for structuring of antiCommunism discourse of Catholic Londrina leaders from the 1950s. Starting on survey of documentary sources and bibliographical, specially texts produced by representatives of Catholic church in Northern Paraná during the period of proposed analysis. We intend to analyse Catholic anti-Communism from point of view of its elements. The complexity of the political historical period of reference of this article shows how about communism in Folha de Londrina is linked to a discourse on other prebuilt discourses. This article is built in three steps: the first one is JK Years: Anti-Communism while legitimizing the development policy that we will produce an analysis of JK government that stood against to communism while conception of society and economic and political structures. The second one is the multifaceted anti-Communism in Brazil. We focus on the theoretical discussion on the concept of anti-Communism pointing out many Brazilian facets interpretation. The last one , faith and power: Anti-Communism sense and Catholic church in Londrina (1955-1958) will systematize texts of Catholic leaders about communism and finally analyze them with the proposed theoretical framework of discourse analysis.

Tratamentos pré-germinativos e substratos na emergência de sementes e qualidade de mudas de pinhão manso (Jatropha curcas L.)

The physic nut can be propagated asexually or sexually. Using cuttings have been earlier yield and more fidelity characteristics of the parent plant. However, there is less initial vegetative growth. The seeds from the plants have increased genetic variability, are more vigorous and begin production later. To get quality changes, the substrate is an important factor. With that the objective was to taste pre-germinated treatments and different substrate on seeds emergence and quality physic nut seedlings. The experimental design was completely randomized, in factorial scheme 6 x 3 (pre-germinated treatments x substrate), 18 treatments and 4 repetition, 8 seeds to each repetition. It was evaluated six pre-germination treatments: T1: witness (without treatments); T2: water immersion for 12 hours; T3: water immersion for 24 hours; T4: mechanical scarification; T5: mechanical scarification + water immersion for 12 hours; T6: mechanical scarification + water immersion for 24 hours, using as substrate: commercial, expanded vermiculite and sand washed. The mechanical scarification was realized opposite the micropyle using sandpaper n. 60. After the pre-germination treatments, the seeds were emergence in plastic cups (200mL) with substrates. We evaluated the characteristics: percentage, beginning and emergence speed index, mean length of plant, diameter of plant stem, SPAD index, fresh and dry shoot and root. The results showed that in seeds of Jatropha do not need pre-germinative treatments; and the use of commercial substrate showed seedling development.

Efeito do congelamento e da pré-incubação sobre o isolamento de estafilococos coagulase-negativo em amostras de leite de ovelhas

O objetivo do presente trabalho foi avaliar o efeito do congelamento e da incubação do leite de ovelhas da raça Santa Inês sobre os resultados da cultura bacteriológica. Desta forma, 45 amostras de leite ovino foram coletadas, e submetidas aos seguintes tratamentos: cultura bacteriológica (T1), e simultaneamente incubadas a 37°C por 18 horas (T2) e congeladas a -20°C por 24 horas (T3). Após esses períodos, as amostras dos T2 e T3 foram submetidas à cultura bacteriológica. O T2 possibilitou aumento no isolamento de estafilococos coagulase-negativo (ECN) comparadas ao T1, não ocorrendo o mesmo com o T3. No entanto, o T2 permitiu o desenvolvimento de bactérias normalmente presentes na microbiota dos ductos dos tetos em ovelhas sadias, como o Bacillus spp. Os resultados do presente estudo indicam que a incubação pode ser aplicada para a detecção de ECN na tentativa de reduzir resultados falso-negativos na cultura bacteriológica do leite de ovelhas da raça Santa Inês, determinando o uso mais eficiente dos recursos laboratoriais e a redução dos custos para os proprietários.

Memória e resistência na migraçao para a Amazônia : O caso de Nova Londrina em Ji-Paraná, estado de Rondônia, Brasil

The occupation of Rondônia, from the 1970s, occurred in a disorganized way, since it attracted an amount of migrants which was much bigger than the settling projects could sustain. The aim of this research was to analyze the circumstances in which the district of Nova Londrina was settled, utilizing for this reason a bibliographic survey, as well as the Oral History method. The arrival in Nova Londrina, Ji-Paraná, was highlighted by conflicts between the settlers and the settling company Calama S/A. In spite of the company's violence, the colonists resisted until there was an intervention from INCRA, through a land regularization program. In this context, the Urban Center for Rural Support (NUAR) was implanted, intending to support the agricultural workers

Memória e resistência na migraçao para a Amazônia : O caso de Nova Londrina em Ji-Paraná, estado de Rondônia, Brasil

The occupation of Rondônia, from the 1970s, occurred in a disorganized way, since it attracted an amount of migrants which was much bigger than the settling projects could sustain. The aim of this research was to analyze the circumstances in which the district of Nova Londrina was settled, utilizing for this reason a bibliographic survey, as well as the Oral History method. The arrival in Nova Londrina, Ji-Paraná, was highlighted by conflicts between the settlers and the settling company Calama S/A. In spite of the company's violence, the colonists resisted until there was an intervention from INCRA, through a land regularization program. In this context, the Urban Center for Rural Support (NUAR) was implanted, intending to support the agricultural workers

Memória e resistência na migraçao para a Amazônia : O caso de Nova Londrina em Ji-Paraná, estado de Rondônia, Brasil

The occupation of Rondônia, from the 1970s, occurred in a disorganized way, since it attracted an amount of migrants which was much bigger than the settling projects could sustain. The aim of this research was to analyze the circumstances in which the district of Nova Londrina was settled, utilizing for this reason a bibliographic survey, as well as the Oral History method. The arrival in Nova Londrina, Ji-Paraná, was highlighted by conflicts between the settlers and the settling company Calama S/A. In spite of the company's violence, the colonists resisted until there was an intervention from INCRA, through a land regularization program. In this context, the Urban Center for Rural Support (NUAR) was implanted, intending to support the agricultural workers

Eficiência de herbicidas para dessecação pré-colheita do trigo e efeitos sobre o rendimento de grãos, germinação e qualidade tecnológica.

2016

Efeitos da aplicação isolada ou associada do herbicida amônio-glufosinato com regulador de crescimento na antecipação da colheita e na germinação pré-colheita do trigo.

2016

BRS REPONTE - Extensão de indicação de trigo para a RHA1 DO RS, SC E PR.

2016

Nuclear localization of NPR1 is required for activation of PR gene expression

Systemic acquired resistance (SAR) is a broad-spectrum resistance in plants that involves the upregulation of a battery of pathogenesis-related (PR) genes. NPR1 is a key regulator in the signal transduction pathway that leads to SAR. Mutations in NPR1 result in a failure to induce PR genes in systemic tissues and a heightened susceptibility to pathogen infection, whereas overexpression of the NPR1 protein leads to increased induction of the PR genes and enhanced disease resistance. We analyzed the subcellular localization of NPR1 to gain insight into the mechanism by which this protein regulates SAR. An NPR1–green fluorescent protein fusion protein, which functions the same as the endogenous NPR1 protein, was shown to accumulate in the nucleus in response to activators of SAR. To control the nuclear transport of NPR1, we made a fusion of NPR1 with the glucocorticoid receptor hormone binding domain. Using this steroid-inducible system, we clearly demonstrate that nuclear localization of NPR1 is essential for its activity in inducing PR genes.

Scaling of free convection heat transfer in a triangular cavity for Pr>1

Unsteady natural convection inside a triangular cavity subject to a non-instantaneous heating on the inclined walls in the form of an imposed temperature which increases linearly up to a prescribed steady value over a prescribed time is reported. The development of the flow from start-up to a steady-state has been described based on scaling analyses and direct numerical simulations. The ramp temperature has been chosen in such a way that the boundary layer is reached a quasi-steady mode before the growth of the temperature is completed. In this mode the thermal boundary layer at first grows in thickness, then contracts with increasing time. However, if the imposed wall temperature growth period is sufficiently short, the boundary layer develops differently. It is seen that the shape of many houses are isosceles triangular cross-section. The heat transfer process through the roof of the attic-shaped space should be well understood. Because, in the building energy, one of the most important objectives for design and construction of houses is to provide thermal comfort for occupants. Moreover, in the present energy-conscious society it is also a requirement for houses to be energy efficient, i.e. the energy consumption for heating or air-conditioning houses must be minimized.

Scaling analysis of the unsteady natural convection boundary layer adjacent to an inclined plate for Pr > 1 following instantaneous heating

The unsteady natural convection boundary layer adjacent to an instantaneously heated inclined plate is investigated using an improved scaling analysis and direct numerical simulations. The development of the unsteady natural convection boundary layer following instantaneous heating may be classified into three distinct stages including a start-up stage, a transitional stage and a steady state stage, which can be clearly identified in the analytical and numerical results. Major scaling relations of the velocity and thicknesses and the flow development time of the natural convection boundary layer are obtained using triple-layer integral solutions and verified by direct numerical simulations over a wide range of flow parameters.

Prandtl number scaling of the unsteady natural convection boundary layer adjacent to a vertical flat plate for Pr > 1 subject to ramp surface heat flux

It is found in the literature that the existing scaling results for the boundary layer thickness, velocity and steady state time for the natural convection flow over an evenly heated plate provide a very poor prediction of the Prandtl number dependency of the flow. However, those scalings provide a good prediction of two other governing parameters’ dependency, the Rayleigh number and the aspect ratio. Therefore, an improved scaling analysis using a triple-layer integral approach and direct numerical simulations have been performed for the natural convection boundary layer along a semi-infinite flat plate with uniform surface heat flux. This heat flux is a ramp function of time, where the temperature gradient on the surface increases with time up to some specific time and then remains constant. The growth of the boundary layer strongly depends on the ramp time. If the ramp time is sufficiently long, the boundary layer reaches a quasi steady mode before the growth of the temperature gradient is completed. In this mode, the thermal boundary layer at first grows in thickness and then contracts with increasing time. However, if the ramp time is sufficiently short, the boundary layer develops differently, but after the wall temperature gradient growth is completed, the boundary layer develops as though the startup had been instantaneous.

Structure and magnetotransport properties of the layered manganites REl.2Srl.8Mn,07(R E = La, Pr, Nd)

We have examined the magnetotransport properties and the structure, by Rietveld refinement of powder X-ray data, of the phases RE(1.2)Sr(1.8)Mn(2)O(7) (RE = La, Pr, Nd). We find that on cooling, La1.2Sr1.8Mn2O7 undergoes a transition to a nearly perfect ferromagnet with 90% magnetization at 1.45 T, as reported by earlier workers, but the Pr and Nd phases show only a small magnetization that grows gradually as the temperature is decreased. There seems to be significant correlation between electrical transport and the Jahn-Teller elongation of the apical Mn-O bonds in these systems. The elongation of the apical Mn-O bonds forces the nine-coordinate rock-salt site to be occupied preferentially by the smaller rare-earth-metal cations. This preferential occupation is reliably obtained from the X-ray refinement. All three title phases show a magnetoresistance ratio of about 4(corresponding to a magnetoresistance, [R(0)-R(H)]/R(0), of about 75%) at a field of 7 T and temperatures around 100 K.