3,236 research outputs found
Ăcidos graxos poli-insaturados na regulação das concentraçÔes sĂ©ricas de triglicerĂdeos e ĂĄcidos graxos nĂŁo esterificados em trĂȘs geraçÔes de ratos wistar.
O objetivo deste estudo foi avaliar o efeito de dietas contendo AGPIs ĂŽmega-3 e ĂŽmega-6 nas concentraçÔes sĂ©ricas de ĂĄcidos graxos nĂŁo esterificados (AGNE) e triglicerĂdeos (TG), no perĂodo prĂ© e pĂłs-parto de ratas Wistar, ao longo de trĂȘs geraçÔes
Efeito de dietas contendo diferentes proporçÔes de AGPIS no ganho de peso de ratos em sucessivas geraçÔes.
O objetivo deste estudo foi avaliar o efeito de dietas com diferentes proporçÔes de åcidos graxos poli-insaturados (AGPIs) Îmega-3:Îmega-6 no peso ao nascimento, peso ao desmame e ganho de peso médio dos filhotes de ratas Wistar/UFPel em sucessivas geraçÔes
Protocolo de indução de cetose sub-clĂnica em ovelhas prenhes e seu efeito sobre parĂąmetros metabĂłlicos.
O objetivo deste estudo foi avaliar a eficiĂȘncia de um protocolo de indução de cetose sub-clĂnica em ovelhas em terço final de gestação, atravĂ©s de seu efeito sobre parĂąmetros bioquĂmicos
Experience of the cleft lip and palate clinic at the hospital general de MĂ©xico 2017-2023
Background: The care of cleft lip and palate patients at the general hospital of Mexico has nearly 70 years of experience.
Methods: An observational study of a 7-year cohort of resolved cases of cleft lip and palate by the plastic and reconstructive surgery service of the general hospital of Mexico (2017-2023) was conducted.
Results: The 121 patients were recorded, with 47 palatoplasties, 44 primary cheiloplasties, 24 secondary cheiloplasties, and 11 veloplasties performed. All patients are evaluated by a multidisciplinary team composed of plastic surgery, dentistry, clinical nutrition, speech therapy, audiology, genetics, and psychology to determine a comprehensive treatment plan.
Conclusions: The data reported by the cohort in this work aligns with international reports. The frequency of cases decreased due to the COVID-19 pandemic, but has increased in recent years
The SUMO project I. A survey of multiple populations in globular clusters
We present a general overview and the first results of the SUMO project (a
SUrvey of Multiple pOpulations in Globular Clusters). The objective of this
survey is the study of multiple stellar populations in the largest sample of
globular clusters homogeneously analysed to date. To this aim we obtained high
signal-to-noise (S/N>50) photometry for main sequence stars with mass down to
~0.5 M_SUN in a large sample of clusters using both archival and proprietary U,
B, V, and I data from ground-based telescopes. In this paper, we focus on the
occurrence of multiple stellar populations in twenty three clusters. We have
defined a new photometric index cubi= (U-B)-(B-I), that turns out to be very
effective for identifying multiple sequences along the red giant branch (RGB).
We found that in the V-cubi diagram all clusters presented in this paper show
broadened or multimodal RGBs, with the presence of two or more components. We
found a direct connection with the chemical properties of different sequences,
that display different abundances of light elements (O, Na, C, N, and Al). The
cubi index is also a powerful tool to identify distinct sequences of stars
along the horizontal branch and, for the first time in the case of NGC104 (47
Tuc), along the asymptotic giant branch. Our results demonstrate that i) the
presence of more than two stellar populations is a common feature among
globular clusters, as already highlighted in previous work; ii) multiple
sequences with different chemical contents can be easily identified by using
standard Johnson photometry obtained with ground-based facilities; iii) in the
study of GC multiple stellar populations the cubi index is alternative to
spectroscopy, and has the advantage of larger statistics.Comment: 23 pages, 20 figures, accepted for publication in MNRA
Sign-changing tower of bubbles for a sinh-Poisson equation with asymmetric exponents
Motivated by the statistical mechanics description of stationary
2D-turbulence, for a sinh-Poisson type equation with asymmetric nonlinearity,
we construct a concentrating solution sequence in the form of a tower of
singular Liouville bubbles, each of which has a different degeneracy exponent.
The asymmetry parameter corresponds to the ratio between the
intensity of the negatively rotating vortices and the intensity of the
positively rotating vortices. Our solutions correspond to a superposition of
highly concentrated vortex configurations of alternating orientation; they
extend in a nontrivial way some known results for . Thus, by
analyzing the case we emphasize specific properties of the
physically relevant parameter in the vortex concentration phenomena
Non-radial sign-changing solutions for the Schroedinger-Poisson problem in the semiclassical limit
We study the existence of nonradial sign-changing solutions to the
Schroedinger-Poisson system in dimension N>=3. We construct nonradial
sign-changing multi-peak solutions whose peaks are displaced in suitable
symmetric configurations and collapse to the same point. The proof is based on
the Lyapunov-Schmidt reduction
A Statistical Inference Method for Interpreting the CLASP Observations
On 3rd September 2015, the Chromospheric Lyman-Alpha SpectroPolarimeter
(CLASP) successfully measured the linear polarization produced by scattering
processes in the hydrogen Lyman- line of the solar disk radiation,
revealing conspicuous spatial variations in the and signals. Via
the Hanle effect the line-center and amplitudes encode information
on the magnetic field of the chromosphere-corona transition region (TR), but
they are also sensitive to the three-dimensional structure of this corrugated
interface region. With the help of a simple line formation model, here we
propose a statistical inference method for interpreting the Lyman-
line-center polarization observed by CLASP.Comment: Accepted for publication in The Astrophysical Journa
CLASP Constraints on the Magnetization and Geometrical Complexity of the Chromosphere-Corona Transition Region
The Chromospheric Lyman-Alpha Spectro-Polarimeter (CLASP) is a suborbital
rocket experiment that on 3rd September 2015 measured the linear polarization
produced by scattering processes in the hydrogen Ly- line of the solar
disk radiation, whose line-center photons stem from the chromosphere-corona
transition region (TR). These unprecedented spectropolarimetric observations
revealed an interesting surprise, namely that there is practically no
center-to-limb variation (CLV) in the line-center signals. Using an
analytical model, we first show that the geometrical complexity of the
corrugated surface that delineates the TR has a crucial impact on the CLV of
the and line-center signals. Secondly, we introduce a statistical
description of the solar atmosphere based on a three-dimensional (3D) model
derived from a state-of-the-art radiation magneto-hydrodynamic simulation. Each
realization of the statistical ensemble is a 3D model characterized by a given
degree of magnetization and corrugation of the TR, and for each such
realization we solve the full 3D radiative transfer problem taking into account
the impact of the CLASP instrument degradation on the calculated polarization
signals. Finally, we apply the statistical inference method presented in a
previous paper to show that the TR of the 3D model that produces the best
agreement with the CLASP observations has a relatively weak magnetic field and
a relatively high degree of corrugation. We emphasize that a suitable way to
validate or refute numerical models of the upper solar chromosphere is by
confronting calculations and observations of the scattering polarization in
ultraviolet lines sensitive to the Hanle effect.Comment: Accepted for publication in The Astrophysical Journal Letter
Role of Linker Functionality in Polymers Exhibiting Main-Chain Thermally Activated Delayed Fluorescence
Excellent performance has been reported for organic lightâemitting diodes (OLEDs) based on small molecule emitters that exhibit thermally activated delayed fluorescence. However, the necessary vacuum processing makes the fabrication of largeâarea devices based on these emitters cumbersome and expensive. Here, the authors present high performance OLEDs, based on novel, TADF polymers that can be readily processed from a solution. These polymers are based on the acridineâbenzophenone donorâacceptor motif as mainâchain TADF chromophores, linked by various conjugated and nonâconjugated spacer moieties. The authorsâ extensive spectroscopic and electronic analysis shows that in particular in case of alkyl spacers, the properties and performance of the monomeric TADF chromophores are virtually left unaffected by the polymerization. They present efficient solutionâprocessed OLEDs based on these TADF polymers, diluted in oligostyrene as a host. The devices based on the alkyl spacerâbased TADF polymers exhibit external quantum efficiencies (EQEs) â12%, without any outcouplingâenhancing measures. What's more, the EQE of these devices does not drop substantially upon diluting the polymer down to only ten weight percent of active material. In contrast, the EQE of devices based on the monomeric chromophore show significant losses upon dilution due to loss of charge percolation
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