6,454 research outputs found

    ImportĂąncia da Sebastiania hispida para o veado-campeiro, Ozotoceros bezoarticus, em perĂ­odos de seca no Pantanal.

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    O veado-campeiro Ă© um herbĂ­voro do tipo podador seletivo, ou seja, alimenta-se principalmente de espĂ©cies de plantas dicotiledĂŽneas. Uma das espĂ©cies presentes na dieta deste cervĂ­deo Ă© o mercĂșrio. Esta espĂ©cie, em anos mais secos, pode apresentar um aumento considerĂĄvel na abundĂąncia formando extensas manchas nas pastagens

    Variation in responses to incretin therapy: modifiable and non-modifiable factors

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    Type 2 diabetes (T2D) and obesity have reached epidemic proportions. Incretin therapy is the second line of treatment for T2D, improving both blood glucose regulation and weight loss. Glucagon-like peptide-1 (GLP-1) and glucose-stimulated insulinotropic polypeptide (GIP) are the incretin hormones that provide the foundations for these drugs. While these therapies have been highly effective for some, the results are variable. Incretin therapies target the class B G protein-coupled receptors GLP-1R and GIPR, expressed mainly in the pancreas and the hypothalamus, while some therapeutical approaches include additional targeting of the related glucagon receptor (GCGR) in the liver. The proper functioning of these receptors is crucial for incretin therapy success and here we review several mechanisms at the cellular and molecular level that influence an individual’s response to incretin therapy

    Ultrafast polariton-phonon dynamics of strongly coupled quantum dot-nanocavity systems

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    We investigate the influence of exciton-phonon coupling on the dynamics of a strongly coupled quantum dot-photonic crystal cavity system and explore the effects of this interaction on different schemes for non-classical light generation. By performing time-resolved measurements, we map out the detuning-dependent polariton lifetime and extract the spectrum of the polariton-to-phonon coupling with unprecedented precision. Photon-blockade experiments for different pulse-length and detuning conditions (supported by quantum optical simulations) reveal that achieving high-fidelity photon blockade requires an intricate understanding of the phonons' influence on the system dynamics. Finally, we achieve direct coherent control of the polariton states of a strongly coupled system and demonstrate that their efficient coupling to phonons can be exploited for novel concepts in high-fidelity single photon generation

    The Dwarf Starburst Host Galaxy of a Type Ia SN at z = 1.55 from CANDELS

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    We present VLT/X-shooter observations of a high redshift, type Ia supernova host galaxy, discovered with HST/WFC3 as part of the CANDELS Supernova project. The galaxy exhibits strong emission lines of Ly{\alpha}, [O II], H{\beta}, [O III], and H{\alpha} at z = 1.54992(+0.00008-0.00004). From the emission-line fluxes and SED fitting of broad-band photometry we rule out AGN activity and characterize the host galaxy as a young, low mass, metal poor, starburst galaxy with low intrinsic extinction and high Ly{\alpha} escape fraction. The host galaxy stands out in terms of the star formation, stellar mass, and metallicity compared to its lower redshift counterparts, mainly because of its high specific star-formation rate. If valid for a larger sample of high-redshift SN Ia host galaxies, such changes in the host galaxy properties with redshift are of interest because of the potential impact on the use of SN Ia as standard candles in cosmology.Comment: 25 pages, 8 figures. Accepted for publication in Ap

    Remarks on one-component inner functions

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    A one-component inner function Θ\Theta is an inner function whose level set ΩΘ(Δ)={z∈D:∣Θ(z)∣<Δ}\Omega_{\Theta}(\varepsilon)=\{z\in \mathbb{D}:|\Theta(z)|<\varepsilon\} is connected for some Δ∈(0,1)\varepsilon\in (0,1). We give a sufficient condition for a Blaschke product with zeros in a Stolz domain to be a one-component inner function. Moreover, a sufficient condition is obtained in the case of atomic singular inner functions. We study also derivatives of one-component inner functions in the Hardy and Bergman spaces. For instance, it is shown that, for 0<p<∞0<p<\infty, the derivative of a one-component inner function Θ\Theta is a member of the Hardy space HpH^p if and only if Θâ€Čâ€Č\Theta'' belongs to the Bergman space Ap−1pA_{p-1}^p, or equivalently Θâ€Č∈Ap−12p\Theta'\in A_{p-1}^{2p}.Comment: Essential changes: the order of sections was changed and Corollary 11 adde
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