Soroprevalência da infecção por Chlamydophila abortus em pequenos ruminantes explorados na Microrregião HOmogênea de Teresina, Piauí, Brasil.

[Seroprevalence of Chlamydophila abortus infection in small ruminants exploited the Teresina homogeneous microregion, Piaui, Brazil]. Abstract: Aimed to conduct epidemiological survey of Chlamydophila abortus in productive and reproductive losses in sheep and goat flocks in homogeneous microregion of Teresina, Piauí, Brazil. 450 samples, 150 sheep and 300 goats were examined. Blood serum samples was stored at -20 ° C and 10 samples from each farm were randomly selected for analysis. The overall prevalence of Chlamydophila abortus in sheep and goats in homogeneous micro region of Teresina was 10.66% (48/450). The overall prevalence of infection by C. abortus in sheep flocks in the region analyzed was 11.3% (17/150) and 7% (21/300) of the overall prevalence of infection in the herd goats. The Chlamydophila abortus agent is present in sheep and goat flocks in homogeneous micro region of Teresina recording the first occurrence of this infection in goats and sheep exploited in the state of Piaui, Brazil.Trabalho apresentado nos Anais do VII Congresso Norte Nordeste de Reprodução Animal (CONERA), Mossoró, maio, 2014

Avaliação de cultivares de gergelim no outono - inverno na região Norte-Fluminense.

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Exact solution for the energy density inside a one-dimensional non-static cavity with an arbitrary initial field state

We study the exact solution for the energy density of a real massless scalar field in a two-dimensional spacetime, inside a non-static cavity with an arbitrary initial field state, taking into account the Neumann and Dirichlet boundary conditions. This work generalizes the exact solution proposed by Cole and Schieve in the context of the Dirichlet boundary condition and vacuum as the initial state. We investigate diagonal states, examining the vacuum and thermal field as particular cases. We also study non-diagonal initial field states, taking as examples the coherent and Schrodinger cat states.Comment: 10 pages, 8 figure

Fatores ambientais sobre pesos em diferentes idades de ovinos da raça Santa Inês no Nordeste do Brasil.

Com o objetivo de avaliar os efeitos de ambiente sobre as características de crescimento dos cordeiros, foram analisados registros de 4094 cordeiros da raça Santa Inês provenientes de rebanhos dos estados da Paraíba, Ceará e Sergipe, coletados num período de 23 anos (1983 a 2005). Foram avaliados os efeitos da estação, do ano de nascimento, sexo do cordeiro, tipo de nascimento e idade da mãe ao parto sobre os pesos corporais ao nascimento (PN), aos 56 dias de idade (P56), aos 112 dias de idade (P112) e aos 196 dias de idade (P196). Os cordeiros nascidos na estação chuvosa e seca não apresentaram diferenças significativas para PN, P56 e P112, porém no P196 os animais nascidos em estação chuvosa apresentaram pesos maiores. Os cordeiros machos foram mais pesados que as fêmeas em todas as idades estudadas. Cordeiros nascidos de parto simples pesaram mais que os nascidos de parto duplo, entretanto, houve interação significativa entre sexo e tipo de parto em que foi observado que fêmeas nascidas de parto simples tiveram pesos maiores que os machos de parto duplo em todas as idades avaliadas. Desta forma, torna-se evidente a necessidade de inclusão e ajuste destas características, como ferramentas de auxílio na avaliação genética e seleção dos animais visando melhoria no desempenho de ovinos da raça Santa Inês. Environmental factors on weights of different ages of Santa Inês sheep in the Northeasterner of Brazil. Abstract: The aim of this study was to evaluate environmental effects on growth performance in Santa Inês lambs, were using data of 4.094 lambs proceeding from Paraíba, Ceará and Sergipe states, collected over an 23-year period (1983 to 2005). The environmental effects of season of birth (winter or summer), sex of lamb, age of dam at lambing and type of birth (single or twins), were important sources of variation to explain differences in weigth at birth (WB), at 56 (W56), 112 (W112) and 196 (W196) days of age. The lambs born in the rain and dry no observed significant differences for WB,WP112 and W56, but the W196 animals born in the rainr season showed higher weights. Males were heavier than female lambs at all ages. Lambs born as singles were heavier (P < 0.01) than lambs born as twins at all ages, however, there was significant interaction between sex and type of birth, that was observed that females lambs born as single had larger weights than the males of twins in all ages. Adjustment factors for sex of lamb, type of birth and age of ewe at lambing need to be estimated and considered in selection programs to improve growth trait of Santa Inês

Estimação de componentes de variância e parâmetros genéticos para pesos do nascimento aos 196 dias de idade em ovinos Santa Inês por meio de modelo multicaracterística.

Resumo: O trabalho foi conduzido com o objetivo de estimar os componentes de variância e parâmetros genéticos para os pesos ao nascer, 56, 112 e 196 dias de idade em ovinos Santa Inês por meio de um modelo animal em análise multicaracterística. O modelo de análise inclui os efeitos aleatórios genéticos aditivos direto e materno e de ambiente permanente materno. Os efeitos fixos utilizados na análise foram os de grupo contemporâneo e idade da mãe ao parto, como covariável. As herdabilidades diretas estimadas para os pesos ao nascer, 56, 112 e 196 dias de idade foram, respectivamente, 0,17, 0,05, 0,08 e 0,10. Os resultados encontrados indicam que o ganho genético obtido por meio de seleção individual será pequeno. O efeito materno apresentou influência sobre os pesos estudados. Variance components and genetics parameters estimation for birth weight to the 196-days in Santa Inês sheep using multiple-trast model. Abstract: The study was carried out with the objective to stimate the variance components and genetics parameters for birth weights 56, 112 and 196-day in Santa Inês sheep using multiple-trast animal model. The molysis model includes the direct additive and maternal genetic effect and permanent maternal environmental effect. The fixed effects used in molysis were the contemporary group and age of dam lombing, as (co)varience. The estimate direct heritability for the weights at the birth, 56, 112 and 196 days of age were 0,17, 0,05, 0,08 and 0,10 respectively. The found results indicate that the genetic gain obtained through individual selection it will be small. The maternal effect presented influence on the weights studied

Generalized thermodynamics of q-deformed bosons and fermions

We study the thermostatistics of q-deformed bosons and fermions obeying the symmetric algebra and show that it can be built on the formalism of q-calculus. The entire structure of thermodynamics is preserved if ordinary derivatives are replaced by an appropriate Jackson derivative. In this framework, we derive the most important thermodynamic functions describing the q-boson and q-fermion ideal gases in the thermodynamic limit. We also investigate the semi-classical limit and the low temperature regime and demonstrate that the nature of the q-deformation gives rise to pure quantum statistical effects stronger than undeformed boson and fermion particles.Comment: 8 pages, Physical Review E in pres

Lessons to be learned from the coherent photoproduction of pseudoscalar mesons

We study the coherent photoproduction of pseudoscalar mesons---particularly of neutral pions---placing special emphasis on the various sources that put into question earlier nonrelativistic-impulse-approximation calculations. These include: final-state interactions, relativistic effects, off-shell ambiguities, and violations to the impulse approximation. We establish that, while distortions play an essential role in the modification of the coherent cross section, the uncertainty in our results due to the various choices of optical-potential models is relatively small (of at most 30%). By far the largest uncertainty emerges from the ambiguity in extending the many on-shell-equivalent representations of the elementary amplitude off the mass shell. Indeed, relativistic impulse-approximation calculations that include the same pionic distortions, the same nuclear-structure model, and two sets of elementary amplitudes that are identical on-shell, lead to variations in the magnitude of the coherent cross section by up to factors of five. Finally, we address qualitatively the assumption of locality implicit in most impulse-approximation treatments, and suggest that the coherent reaction probes---in addition to the nuclear density---the polarization structure of the nucleus.Comment: Manuscript is 27 pages long and includes 11 eps figure