Criação de suínos da raça piau em propriedades familiares agroecológicos

Diante do atual modelo hegemônico de produção da suinocultura, a criação animal na perspectiva agroecológica se apresenta como alternativa para agricultores/as familiares que buscam soberania e segurança alimentar. A utilização da raça Piau se mostrou interessante numa experiência agroecológica, devido a sua alta rusticidade, pois trata-se de uma raça brasileira bem adaptada à s condições climáticas tropicais. Existe na Universidade Federal de Viçosa um projeto para preservação da raça, pois esta se encontra ameaçada, e atendendo a uma demanda de projeto pedagógico do curso de Licenciatura em Educação do Campo, surgiu a oportunidade de construção de um projeto objetivando a produção de suíno agroecológico. O presente trabalho foi construído com metodologia participativa entre o Grupo Animais para Agroecologia (UFV) e dois agricultores com vivência agroecológica com o objetivo de disseminar a raça na Zona da Mata Mineira e favorecer a soberania e segurança alimentar dessas famílias.Eje B1 Sistemas de producción de base agroecológica (Relatos de experiencias)Facultad de Ciencias Agrarias y Forestale

Criação de suínos da raça piau em propriedades familiares agroecológicos

Diante do atual modelo hegemônico de produção da suinocultura, a criação animal na perspectiva agroecológica se apresenta como alternativa para agricultores/as familiares que buscam soberania e segurança alimentar. A utilização da raça Piau se mostrou interessante numa experiência agroecológica, devido a sua alta rusticidade, pois trata-se de uma raça brasileira bem adaptada à s condições climáticas tropicais. Existe na Universidade Federal de Viçosa um projeto para preservação da raça, pois esta se encontra ameaçada, e atendendo a uma demanda de projeto pedagógico do curso de Licenciatura em Educação do Campo, surgiu a oportunidade de construção de um projeto objetivando a produção de suíno agroecológico. O presente trabalho foi construído com metodologia participativa entre o Grupo Animais para Agroecologia (UFV) e dois agricultores com vivência agroecológica com o objetivo de disseminar a raça na Zona da Mata Mineira e favorecer a soberania e segurança alimentar dessas famílias.Eje B1 Sistemas de producción de base agroecológica (Relatos de experiencias)Facultad de Ciencias Agrarias y Forestale

Criação de suínos da raça piau em propriedades familiares agroecológicos

Diante do atual modelo hegemônico de produção da suinocultura, a criação animal na perspectiva agroecológica se apresenta como alternativa para agricultores/as familiares que buscam soberania e segurança alimentar. A utilização da raça Piau se mostrou interessante numa experiência agroecológica, devido a sua alta rusticidade, pois trata-se de uma raça brasileira bem adaptada à s condições climáticas tropicais. Existe na Universidade Federal de Viçosa um projeto para preservação da raça, pois esta se encontra ameaçada, e atendendo a uma demanda de projeto pedagógico do curso de Licenciatura em Educação do Campo, surgiu a oportunidade de construção de um projeto objetivando a produção de suíno agroecológico. O presente trabalho foi construído com metodologia participativa entre o Grupo Animais para Agroecologia (UFV) e dois agricultores com vivência agroecológica com o objetivo de disseminar a raça na Zona da Mata Mineira e favorecer a soberania e segurança alimentar dessas famílias.Eje B1 Sistemas de producción de base agroecológica (Relatos de experiencias)Facultad de Ciencias Agrarias y Forestale

Accurate Atmospheric Parameters at Moderate Resolution Using Spectral Indices: Preliminary Application to the MARVELS Survey

Studies of Galactic chemical and dynamical evolution in the solar neighborhood depend on the availability of precise atmospheric parameters (Teff, [Fe/H] and log g) for solar-type stars. Many large-scale spectroscopic surveys operate at low to moderate spectral resolution for efficiency in observing large samples, which makes the stellar characterization difficult due to the high degree of blending of spectral features. While most surveys use spectral synthesis, in this work we employ an alternative method based on spectral indices to determine the atmospheric parameters of a sample of nearby FGK dwarfs and subgiants observed by the MARVELS survey at moderate resolving power (R~12,000). We have developed three codes to automatically normalize the observed spectra, measure the equivalent widths of the indices and, through the comparison of those with values calculated with pre-determined calibrations, derive the atmospheric parameters of the stars. The calibrations were built using a sample of 309 stars with precise stellar parameters obtained from the analysis of high-resolution FEROS spectra. A validation test of the method was conducted with a sample of 30 MARVELS targets that also have reliable atmospheric parameters from high-resolution spectroscopic analysis. Our approach was able to recover the parameters within 80 K for Teff, 0.05 dex for [Fe/H] and 0.15 dex for log g, values that are lower or equal to the typical external uncertainties found between different high-resolution analyzes. An additional test was performed with a subsample of 138 stars from the ELODIE stellar library and the literature atmospheric parameters were recovered within 125 K for Teff, 0.10 dex for [Fe/H] and 0.29 dex for log g. These results show that the spectral indices are a competitive tool to characterize stars with the intermediate resolution spectra.Comment: Accepted for publication in AJ. Abstract edited to comply with arXiv standards regarding the number of character

The impact of the COVID-19 pandemic on dental trauma attendance: a systematic review and meta-analysis

This systematic review and meta-analysis aimed to analyze the impact of the COVID-19 pandemic on dental trauma patient attendance. The study was registered in the PROSPERO system, using the CRD42021288398 protocol. Searching was performed in PubMed, Scopus, Web of Science, Embase, Lilacs, and OpenGrey databases, using the following keywords: “Tooth injuries,” “Dental trauma,” “Traumatic Dental injury,” and “COVID-19". We included observational studies evaluating dental trauma in the context of the COVID-19 pandemic. Quality assessment was performed using the Joanna Briggs Institute Critical Appraisal Checklist for Cross-Sectional Studies. Meta-analysis was performed in RevMan 5.4 software with Odds Ratios as a pooled measure of effect, with a 95% confidence interval, and using random-effects modeling. After applying the eligibility criteria, 32 studies were included for qualitative analysis, in which 10 were used to assess the frequency of dental trauma diagnoses in dental emergencies. Despite the decrease of visits during COVID-19, the analysis revealed no difference between the pandemic and pre-pandemic periods. Regarding the type of dental trauma, two of the studies revealed no differences for the periods before and during the pandemic. This study revealed that the COVID-19 pandemic has not impacted the frequency or type of dental trauma compared to previous periods

Ciclização do lapachol induzida por sais de tálio III

This work describes the cyclization of lapachol (1) induced by thallium triacetate (TTA) and thallium trinitrate (TTN) in several solvents using magnetic stirring and under microwave irradiation. alpha-Xyloidone (2) - dehydro-alpha-lapachone - was obtained as the main product in these reactions in 20 75% yield. However, rhinacanthin-A (4) was isolated as main product in a 40% yield, using TTA and acetic anhydride:water (1:1) as solvent, and dehydro-iso-alpha-lapachone (3) in 21% yield, using TTA and dichloromethane as solvent. The reaction time decreased drastically under microwave conditions, but the yields of these reactions were not the expected

Exploring the brown dwarf desert : new substellar companions from the SDSS-III MARVELS survey

Planet searches using the radial velocity technique show a paucity of companions to solar-type stars within ∼5 au in the mass range of ∼10–80 MJup. This deficit, known as the brown dwarf desert, currently has no conclusive explanation. New substellar companions in this region help assess the reality of the desert and provide insight to the formation and evolution of these objects. Here, we present 10 new brown dwarf and 2 low-mass stellar companion candidates around solar-type stars from the Multi-object APO Radial Velocity Exoplanet Large-Area Survey (MARVELS) of the Sloan Digital Sky Survey III. These companions were selected from processed MARVELS data using the latest University of Florida Two Dimensional pipeline, which shows significant improvement and reduction of systematic errors over previous pipelines. The 10 brown dwarf companions range in mass from ∼13 to 76 MJup and have orbital radii of less than 1 au. The two stellar companions have minimum masses of ∼98 and 100 MJup. The host stars of the MARVELS brown dwarf sample have a mean metallicity of [Fe/H] = 0.03 ± 0.08 dex. Given our stellar sample we estimate the brown dwarf occurrence rate around solar-type stars with periods less than ∼300 d to be ∼0.56 per cent