The fundamental parameters of the roAp star 10 Aql

Due to the strong magnetic field and related abnormal surface layers existing in rapidly oscillating Ap stars, systematic errors are likely to be present when determining their effective temperatures, which potentially compromises asteroseismic studies of these pulsators. Using long-baseline interferometry, our goal is to determine accurate angular diameters of a number of roAp targets to provide a temperature calibration for these stars. We obtained interferometric observations of 10 Aql with the visible spectrograph VEGA at the CHARA array. We determined a limb-darkened angular diameter of 0.275+/-0.009 mas and deduced a linear radius of 2.32+/-0.09 R_sun. We estimated the star's bolometric flux and used it, in combination with its parallax and angular diameter, to determine the star's luminosity and effective temperature. For two data sets of bolometric flux we derived an effective temperature of 7800+/-170 K and a luminosity of 18+/-1 L_sun or of 8000+/-210 K and 19+/-2 L_sun. We used these fundamental parameters together with the large frequency separation to constrain the mass and the age of 10 Aql, using the CESAM stellar evolution code. Assuming a solar chemical composition and ignoring all kinds of diffusion and settling of elements, we obtained a mass of 1.92 M_sun and an age of 780 Gy or a mass of 1.95 M_sun and an age of 740 Gy, depending on the considered bolometric flux. For the first time, we managed to determine an accurate angular diameter for a star smaller than 0.3 mas and to derive its fundamental parameters. In particular, by only combining our interferometric data and the bolometric flux, we derived an effective temperature that can be compared to those derived from atmosphere models. Such fundamental parameters can help for testing the mechanism responsible for the excitation of the oscillations observed in the magnetic pulsating stars

Avaliação do uso da prostaglandina na sincronização do estro associado ou não ao uso do hCG em cabras.

Resumo: O objetivo deste estudo foi avaliar a eficácia da sincronização do estro sobre os parâmetros ovarianos e comportamentais de cabras da raça Toggenburg. A administração da hCG no inicio do estro é capaz de antecipar a ovulação e promover um aumento no numero de ovulações. Estes resultados devem ser observados para estabelecimento momento ideal para a IA. [Evaluation of the use prostaglandin in synchronization the estrus associated or not the hCG in goats]

Os media participativos e o poder da identidade na oncologia: O cidadão e a instituição enquanto marcas interactivas

Neste artigo procuramos averiguar a relevância que as marcas e identidades têm nas plataformas participativas no contexto da saúde, em particular na oncologia. Apesar de estas plataformas disponibilizarem aos cidadãos e instituições as mesmas ferramentas, a sua capacidade de mobilização não é a mesma. As instituições parecem ter maior facilidade, mas nem sempre tal acontece. Discutir o conceito de marca e de identidade contribuirá para responder a esta questão, bem como compreender porque é que as diferenças entre os cidadãos e as instituições se podem atenuar nos novos media. Baseamos a nossa análise na observação de páginas do Facebook, de instituições oncológicas e de grupos de apoio de cidadãos; num conjunto de entrevistas a doentes e familiares oncológicos; e em diferentes estudos na saúde. No fim, procura-se esclarecer a importância do estudo das marcas e da identidade, como possível directriz de novas soluções nos media participativos, que contribuam para atenuar o problema individual do cidadão que se relaciona com o cancro.info:eu-repo/semantics/publishedVersio

Possíveis impactos do projeto: "Uso de sêmen resfriado e inseminação artificial em caprinos leiteiros na República de Cabo Verde".

Resumo - Este artigo procura discutir o contexto do projeto ?Uso de sêmen resfriado e inseminação artificial em caprinos leiteiros na República de Cabo Verde?, suas implicações no sistema de criação de caprinos leiteiros, bem como seu impacto nos planos social, ambiental e econômico. Possible impacts of the project: "use of chilled semen and artificial insemination in dairy goats on Cape Verde Republic?. Abstract - This article intent to discuss the aspects involved in the project ?Use of chilled semen and artificial insemination in dairy goats on Cape Verde Republic? their implications on dairy goats rearing and also, the social, the economic, and the environmental impacts.Anais do 15o. Simpósio Paranaense de Ovinocultura, 3o. Simpósio Paranaense de Caprinocultura, 3o. Simpósio Sul Brasileiro de Ovinos e Caprinos, Pato Branco, PR, out., 2011

Inseminação artificial em caprinos leiteiros com sêmen resfriado por 24 ou 48 horas.

Resumo - Objetivou-se, avaliar a viabilidade da utilização do sêmen caprino diluído em meio tris-gema 2,5% resfriado a 5°C e armazenado por diferentes períodos (24 ou 48 horas). Foram inseminadas por via transcervical 133 cabras sem raça definida e nativas da República de Cabo Verde, divididas aleatoriamente em dois tratamentos T24 e T48. O estro foi sincronizado com a utilização de esponjas intra-vaginais contendo 60 mg de acetato de medroxiprogesterona por seis dias; 37,5 ?g de D-cloprostenol e 200 UI de eCG 24 horas antes da retirada da esponja. Foram utilizados três reprodutores da Raça Canárias. Para resfriar e manter o sêmen a 5o C foi utilizado o Botutainer® (Biotech Botucatu, Reprodução Animal, Botucatu - SP) adaptado. Não houve diferença (P > 0,05) entre os padrões seminais para os diferentes períodos de resfriamento (T24 - 58,8% ± 11,1 de motilidade e 2,9 ± 0,5 de vigor; T48 - 51,3% ± 2,5 de motilidade e 2,8 ± 0,3 de vigor), o que permitiu obter taxas de parição similares em ambos os tratamentos (T24 - 26,5% e T48 - 21,5%). A eficiência dos protocolos testados permitiu a disseminação de genética caprina na República de Cabo Verde. Conclui-se que o sêmen caprino, resfriado por 48 horas a 5ºC, tem o mesmo potencial de fertilização do sêmen resfriado por 24 horas a 5ºC. Artificial insemination in dairy goats with cooled semen stored for 24 or 48 hours. Abstract - The fertilizing capacity of goat semen diluted in tris-egg yolk 2.5% chilled at 5oC for 24 or 48 hours was evaluated. Transcervical artificial insemination was performed in 133 goats that were divided, randomly, into two treatments T24 and T48. The estrus was synchronized by the mean of intra-vaginal sponges containing 60 mg of medroxyprogesterone acetate for six days; 37.5 mg of D-cloprostenol and 200 IU of eCG, 24 hours before removing the sponge. Three Canarian?s Buck were used. For cooling and keeping the semen at 5oC a Botutainer® (Biotech Botucatu, Animal Reproduction, Botucatu - SP) was adapted and used. There was no difference (P > 0.05) between the seminal patterns for the different periods of cooling (T24 - 58.8%±11.1 for motility and 2.9±0.5 for strength; T48 - 51.3%±2.5 for motility and 2.8±0.3 for strength), which allowed to obtain similar pregnancy rates in both treatments (T24 ? 26.5% and T48 - 21,5%). The efficiency of the tested protocols allowed the dissemination of goat?s genetic material in the Republic of Cape Verde. It was concluded that goat semen, cooled for 48 hours at 5ºC, has the same fertility that semen cooled for 24 hours at 5ºC.Anais do 15o. Simpósio Paranaense de Ovinocultura, 3o. Simpósio Paranaense de Caprinocultura, 3o. Simpósio Sul Brasileiro de Ovinos e Caprinos, Pato Branco, PR, out., 2011

A Generalization of Quantum Stein's Lemma

We present a generalization of quantum Stein's Lemma to the situation in which the alternative hypothesis is formed by a family of states, which can moreover be non-i.i.d.. We consider sets of states which satisfy a few natural properties, the most important being the closedness under permutations of the copies. We then determine the error rate function in a very similar fashion to quantum Stein's Lemma, in terms of the quantum relative entropy. Our result has two applications to entanglement theory. First it gives an operational meaning to an entanglement measure known as regularized relative entropy of entanglement. Second, it shows that this measure is faithful, being strictly positive on every entangled state. This implies, in particular, that whenever a multipartite state can be asymptotically converted into another entangled state by local operations and classical communication, the rate of conversion must be non-zero. Therefore, the operational definition of multipartite entanglement is equivalent to its mathematical definition.Comment: 30 pages. (see posting by M. Piani arXiv:0904.2705 for a different proof of the strict positiveness of the regularized relative entropy of entanglement on every entangled state). published version

Repetition of estrus is the most frequent reproductive problem after breeding in dairy cattle from Rio de Janeiro, Brazil.

Reproductive efficiency is one of the key elements for any milk production system to be successful. In this regard, reproductive management must be planned properly and the identification of the main reproductive disorders that affect the herd is primordial for decisionmaking. The aim of the present study was to identify the main reproductive problems that affect dairy herds on Rio de Janeiro (RJ), Brazil. Data regarding breed, age, reproductive disorder occurrence, and breeding system were individually collected from dairy cows raised at 25 farms located at RJ. The occurrence of reproductive disorders was reported in 37% of the studied animals. Estrous repetition (76.2%) and abortion (15.6%) were the most frequent reproductive problems reported. Estrous repetition was more common in older animals (>6 years old). However, an association between abortion and age of animal was not observed, nor an association between breeding system and occurrence of abortion. The present results demonstrated that estrous repetition is the main obstacle to the reproductive efficiency in dairy herds at RJ, and that the replace of older cows by heifers is an important point within reproductive management of a dairy herd

Dinâmica luteal em cabras da raça Toggenburg: caracterização morfológica e endócrina.

Edição dos Resumos XXII Reunião Anual da Sociedade Brasileira de Tecnologia de Embriões, Guarujá, SP, 2008

Quantificação de flavonoides e fenólicos totais em extratos de folhas de acessos de Passiflora suberosa e híbrido

Recursos Genético