Fósforo, fosfato de rocha e fluorose em bovinos.

Fosfatos naturais na alimentação animal. Uso e abuso dos fosfatos naturais. Essencialidade do flúor. Metabolismo do flúor. Fluor e produção de leite. Flúor e reprodução. O flúor e a barreira placentária. Recuperação do animal exposto ao flúor. Antagonistas do flúor. Efeitos tóxicos do flúor. Diagnóstico de fluorese. Dentição normal dos bovinos. Fluorose dentária.bitstream/item/104565/1/Fosforo-fosfato-de-rocha.pd

An effective singular oscillator for Duffin-Kemmer-Petiau particles with a nonminimal vector coupling: a two-fold degeneracy

Scalar and vector bosons in the background of one-dimensional nonminimal vector linear plus inversely linear potentials are explored in a unified way in the context of the Duffin-Kemmer-Petiau theory. The problem is mapped into a Sturm-Liouville problem with an effective singular oscillator. With boundary conditions emerging from the problem, exact bound-state solutions in the spin-0 sector are found in closed form and it is shown that the spectrum exhibits degeneracy. It is shown that, depending on the potential parameters, there may or may not exist bound-state solutions in the spin-1 sector.Comment: 1 figure. arXiv admin note: substantial text overlap with arXiv:1009.159

BPS black holes, the Hesse potential, and the topological string

The Hesse potential is constructed for a class of four-dimensional N=2 supersymmetric effective actions with S- and T-duality by performing the relevant Legendre transform by iteration. It is a function of fields that transform under duality according to an arithmetic subgroup of the classical dualities reflecting the monodromies of the underlying string compactification. These transformations are not subject to corrections, unlike the transformations of the fields that appear in the effective action which are affected by the presence of higher-derivative couplings. The class of actions that are considered includes those of the FHSV and the STU model. We also consider heterotic N=4 supersymmetric compactifications. The Hesse potential, which is equal to the free energy function for BPS black holes, is manifestly duality invariant. Generically it can be expanded in terms of powers of the modulus that represents the inverse topological string coupling constant, $g_s$, and its complex conjugate. The terms depending holomorphically on $g_s$ are expected to correspond to the topological string partition function and this expectation is explicitly verified in two cases. Terms proportional to mixed powers of $g_s$ and $\bar g_s$ are in principle present.Comment: 28 pages, LaTeX, added comment

Ácido cítrico em dietas para tilápia-do-Nilo (Oreochromis niloticus).

Resumo: Os ácidos orgânicos compõem um grupo de substâncias classificadas como aditivos zootécnicos e são utilizados para melhorar o desempenho dos animais. Este trabalho foi desenvolvido com o objetivo de avaliar a suplementação do ácido cítrico (0%; 1 %; 2%; 3% e 4%) nas dietas para juvenis de tilápia-do-nilo. As dietas experimentais foram formuladas para serem isoproteicas (28% de proteína digestível-PD) e isoenergéticas (3.100 kcal de energia digestível - ED kg-1). O ensaio de desempenho foi conduzido durante 40 dias, onde foram avaliados os parâmetros de desempenho, hematológicos, pH do estômago, pH do intestino e composição corporal dos animais. Os juvenis de tilápia (n= 200; 14,59 ± 0,81 g) foram distribuídos em 25 aquários (300 L) com renovação de água constante em um delineamento experimental inteiramente casualizado, com cinco tratamentos e cinco repetições. Para a determinação dos coeficientes de digestibilidade aparente (CDA) foram utilizados juvenis de tilápias-do-nilo (n= 120; 62,35 ± 2,12 g) alimentados com rações experimentais acrescidas com 0,1% de óxido de cromo III, durante 18 dias. O pH da ração diminuiu (p0,05) do pH estomacal e intestinal, entre os diferentes tratamentos. A suplementação do ácido cítrico não influenciou os parâmetros de desempenho e para os nutrientes, proteína bruta, energia bruta, extrato etéreo e cinzas das dietas experimentais. Por outro lado, os níveis de 1%, 2% e 3% de ácido cítrico proporcionaram aumento (p<0,05) na disponibilidade do fósforo, enquanto que o nível de 2% melhorou (p<0,05) a disponibilidade de cálcio, quando comparado ao controle. Além disso, houve o aumento (p<0,05) na altura, largura e profundidade de cripta para os tratamentos contendo 1% e 2% de ácido cítrico, além de incremento (p<0,05) de leucócitos totais e proteína plasmática total para os tratamentos contendo 1% e 3% de ácido cítrico. A suplementação de 2% de ácido cítrico melhora a disponibilidade de cálcio e fósforo e influencia positivamente a morfologia intestinal de juvenis de tilápia-do-nilo.Dissertação (Mestrado em Zootecnia) - Programa de Pós-graduação em Zootecnia, Universidade Federal do Mato Grosso do Sul, Aquidauana. Orientador: Hamilton Hisano CNPMA

Instruments for investigating fitness to drive - needs and expectations in primary care: a qualitative study

Background: Primary care physicians are often requested to assess their patients' fitness to drive. Little is however known on their needs to help them in this task. Aims: The aim of this study is to develop theories on needs, expectations, and barriers for clinical instruments helping physicians assess fitness to drive in primary care. Methods: This qualitative study used semi-structured interviews to investigate needs and expectations for instruments used to assess fitness to drive. From August 2011 to April 2013, we recorded opinions from five experts in traffic medicine, five primary care physicians, and five senior drivers. All interviews were integrally transcribed. Two independent researchers extracted, coded, and stratified categories relying on multi-grounded theory. All participants validated the final scheme. Results: Our theory suggests that for an instruments assessing fitness to drive to be implemented in primary care, it need to contribute to the decisional process. This requires at least five conditions: 1) it needs to reduce the range of uncertainty, 2) it needs to be adapted to local resources and possibilities, 3) it needs to be accepted by patients, 4) choices of tasks need to adaptable to clinical conditions, 5) and interpretation of results need to remain dependant of each patient's context. Discussion and conclusions: Most existing instruments assessing fitness to drive are not designed for primary care settings. Future instruments should also aim to support patient-centred dialogue, help anticipate driving cessation, and offer patients the opportunity to freely take their own decision on driving cessation as often as possible

Radiocarbon and blue optically stimulated luminescence chronologies of the Oitavos consolidated dune (Western Portugal)

The dune of Oitavos, the underlying paleosol, and Helix sp. gastropod shells found within the paleosol were dated using a combination of radiocarbon and blue optically stimulated luminescence (OSL). The organic component of the paleosol produced a significantly older age (~20,000 cal BP) than the OSL age measurement (~15,000 yr), while 14C age measurements on the inorganic component and the gastropods produced ages of ~35,000 yr and ~34,000 yr, respectively. Rare-earth element analyses provide evidence that the gastropods incorporate geological carbonate, making them an unreliable indicator of the age of the paleosol. We propose that the 14C age of the small organic component of the paleosol is also likely to be unreliable due to incorporation of residual material. The OSL age measurement of the upper paleosol (~15,000 yr) is consistent with the age for the base of the dune (~14,500 yr). The younger OSL age for the top of the dune (~12,000 yr) suggests that it was built up by at least 2 sand pulses or that there was a remobilization of material at the top during its evolution, prior to consolidation

Correspondence: The One Health concept applied to dirofilariasis-a zoonotic disease

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