Estacionalidade na atividade sexual e qualidade do sêmen nos ovinos deslanados das raças Santa Inês e Somalis brasileira.

Resumo: Em dez ovinos deslanados das racas Santa Ines e Somalis brasileira, sendo cinco de cada, foi coletado e ejaculado espermatico, atraves da vagina artificial, durante um ano. O objetivo foi avaliar a atividade sexual do macho ovino, nas condicoes do Nordeste brasileiro, no periodo seco (agosto a dezembro de 1983) e chuvoso (janeiro a maio de 1984) e as diferencas entre racas. Na avaliacao do esperma houve uma diferenca (P<0,001) entre racas, a Santa Ines mostrando maior volume e concentracao do que a Somalis brasileira. Nao se obtiveram diferencas quanto a porcentagem de espermatozoides vivos e motilidade progressiva. Na epoca seca, o volume e a concentracao foram menores que na epoca chuvosa (P<0,001). Porem a porcentagem de espermatozoides vivos e a motilidade nao apresentaram diferencas quanto as epocas. A patologia espermatica nao foi diferente quanto as racas e epocas, mostrando niveis relativamente altos para alcancar uma taxa de fertilidade. As racas Santa Ines e Somalis brasileira se mostraram perfeitamente adaptadas as condicoes climaticas e nutricionais do Nordeste brasileiro, quanto a sua atividade sexual.bitstream/item/36444/1/BP-08.pd

Runoff at the micro-plot and slope scale following wildfire, central Portugal

Through their effects on soil properties and vegetation/litter cover, wildfires can strongly enhance overland flow generation and accelerate soil erosion [1] and, thereby, negatively affect land-use sustainability as well as downstream aquatic and flood zones. Wildfires are a common phenomenon in present-day Portugal, devastating in an average year some 100.000 ha of forest and woodlands and in an exceptional year like 2003 over 400.000 ha. There therefore exists a clear need in Portugal for a tool that can provide guidance to post-fire land management by predicting soil erosion risk, on the one hand, and, on the other, the mitigation effectiveness of soil conservation measures. Such a tool has recently been developed for the Western U.S.A. [3: ERMiT] but its suitability for Portuguese forests will need to be corroborated by field observations. Testing the suitability of existing erosion models in recently burned forest areas in Portugal is, in a nutshell, the aim of the EROSFIRE projects. In the first EROSFIRE project the emphasis was on the prediction of erosion at the scale of individual hill slopes. In the ongoing EROSFIRE-II project the spatial scope is extended to include the catchment scale, so that also the connectivity between hill slopes as well as channel and road processes are being addressed. Besides ERMiT, the principal models under evaluation for slope-scale erosion prediction are: (i) the variant of USLE [4] applied by the Portuguese Water Institute after the wildfires of 2003; (ii) the Morgan–Morgan–Finney model (MMF) [5]; (iii) MEFIDIS [6]. From these models, MEFIDIS and perhaps MMF will, after successful calibration at the slope scale, also be applied for predicting catchment-scale sediment yields of extreme events

Three-body description of direct nuclear reactions: Comparison with the continuum discretized coupled channels method

The continuum discretized coupled channels (CDCC) method is compared to the exact solution of the three-body Faddeev equations in momentum space. We present results for: i) elastic and breakup observables of d-12C at E_d=56 MeV, ii) elastic scattering of d-58Ni at E_d=80 MeV, and iii) elastic, breakup and transfer observables for 11Be+p at E_{11Be}/A=38.4 MeV. Our comparative studies show that, in the first two cases, the CDCC method is a good approximation to the full three-body Faddeev solution, but for the 11Be exotic nucleus, depending on the observable or the kinematic regime, it may miss out some of the dynamic three-body effects that appear through the explicit coupling to the transfer channel.Comment: 12 pages, 10 figures, accepted for publication in Physical Review

Agricultural systems in Amazonia depend on the management of mycorrhizal fungi.

A large number of useful tropical plant species are dependent on mycorrhizal fungi. Without the fungal symbionts they show growth depression and lower tolerance to biotic and abiotic stresses. In plant production systems, common management practices normally result in symbiosis deficits. In tropical regions where the system of shifting cultivation is practiced, the fallow period was thought to have a positive regulating effect on the mycorrhizal situation. It's showed that between three and eight years of fallow there is an increase of the inoculum potential in the soils but the effectivity of the fungal populations remains very low in comparison to the populations from natural sites. The need to manage the mycorrhizal fungi in situ in the field is discussed

Runoff and erosion at the micro-plot and slope scale in a small burnt catchment, central Portugal

Wildfires can have important impacts on hydrological processes and soil erosion in forest catchments, due to the destruction of vegetation cover and changes to soil properties. However, the processes involved are non-linear and not fully understood. This has severely limited the understanding on the impacts of wildfires, especially in the up-scaling from hillslopes to catchments; in consequence, current models are poorly adapted for burnt forest conditions. The objective of this presentation is to give an overview of the hydrological response and sediment yield from the micro-plot to slope scale, in the first year following a wildfire (2008/2009) that burnt an entire catchment nearby the Colmeal village, central Portugal. The overview will focus on three slopes inside the catchment, with samples including: • Runoff at micro-plot scale (12 bounded plots) and slope scale (12 open plots); • Sediments and Organic Matter loss at micro-plot scale (12 bounded plots) and slope scale (12 open plots plus 3 Sediment fences); • Rainfall and Soil moisture data; • Soil Water Repellency and Ground Cover data. The analysis of the first year following the wildfire clearly shows the complexity of runoff generation and the associated sediment transport in recently burnt areas, with pronounced differences between hillslopes and across spatial scales as well as with marked variations through time. This work was performed in the framework of the EROSFIRE-II project (PTDC/AGR-CFL/70968/2006) which has as overall aim to predict soil erosion risk in recently burnt forest areas, including common post-fire forest management practices; the project focuses on the simultaneous measurement of runoff and soil erosion at multiple spatial scales.The results to be presented in this session are expected to show how sediment is generated, transported and exported in the Colmeal watershed; and contribute to understand and simulate erosion processes in burnt catchments, including for model development and evaluation

Intermediate osteotomies in rhinoplasty: a new perspective

The nasal dorsum framework plays a major role in nasal and facial harmony. This study presents a new approach to an already known technique, intermediate osteotomies, which can be used routinely in patients with cosmetically unpleasant changes in eyebrow-tip line features, allowing the acquisition of a natural, aesthetically agreeable and harmonious dorsum contour, while preserving nasal function. The approach was evaluated retrospectively in 50 consecutive patients at a tertiary referral hospital. Patients were asked to complete a survey to rate their satisfaction with the cosmetic outcome on a 5-point visual analog scale (VAS) and to compare the impact of nasal obstruction on their quality of life, pre- and postoperatively, by completing the validated Nasal Obstruction Symptom Evaluation (NOSE) scale. Satisfaction was scored as excellent (satisfaction level VAS average score, 4.4), with more than 50% of the patients completely satisfied with the aesthetic result, while NOSE scale scores demonstrated preservation of nasal function postoperatively. Typical complications of the upper third of the nose following osteotomies were not observed.info:eu-repo/semantics/publishedVersio

Tempo de ovulação em cabras (sem raça definida) sincronizadas com esponjas vaginais de FGA (acetato de fluorogesterona) e superovuladas com PMSG. (Resultados preliminares).

Resultados preliminares, indicam que a inseminação natural ou artificial em cabras sincronizadas, criadas em regime semi-extensivo, deve ser feita acima de 37 horas após a retirada da esponja ou acima de 11 horas após o início do estro, quando ocorre a ovulação

Produção de sementes de adubos verdes e de forragem em cultivo consorciado com milho em pequenas propriedades.

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