Variedades de abacaxi.

Todas as variedades de abacaxi cujo interesse é o fruto, seja para consumo in natura ou para processamento, pertencem à espécie Ananas comosus var. comosus. Alguns clones de Ananas comosus var. erectifolius, Ananas comosus var. ananassoides e Ananas comosus var. bracteatus são cultivados para produção de fibra ou para fins ornamentais. Recentemente, houve grande incremento nestas formas de utilização. A variedade de abacaxi predominantemente cultivada no mundo é a Smooth Cayenne, responsável por cerca de 70% da produção mundial de abacaxi. Contudo, outras variedades como Singapore Spanish, Queen, Red Spanish, Pérola e Perolera são muito cultivadas e difundidas em nível mundial (Leal, 1990). No Brasil, onde a área de plantio em 2002 foi de 62.597 ha, com produção de 1.430.018 mil frutos e rendimento de 22.845 frutos/ha (IBGE, 2003), a variedade mais plantada é a Pérola, responsável por cerca de 80% da produção brasileira de abacaxi havaiano, cujos plantios se concentram no Sudeste do país, principalmente em São Paulo e na região do Triângulo Mineiro.bitstream/item/81569/1/Circular-Tecnica-63-Variedade-Abacaxi-Renato-Cabral-2003.pdfMemória

Enhancing pedagogical innovation in a Portuguese vocational school: insights from a community of practice

The school mission addresses a social purpose: providing each student with quality and meaningful learning experiences that prepare them for a limitless future. In the Decree-Law nº55/2018 establishes changes in the curriculum and, consequently, expects that teachers play a more active role in its development. Teacher collaboration in the workplace is a key dimension to fostering school innovation (Kelchtermans, Smith & Vanderlinde, 2018), despite being a missing practice (Ben-Peretz & Flores, 2018). This study is part of an ongoing project carried out by SAME (Support Service for the Improvement of Education) from the Faculty of Education and Psychology of Universidade Católica Portuguesa (Porto, Portugal), in which is expected to enhance pedagogical innovation in a Portuguese vocation school, by re-thinking the planning of the curricula.The methodological approach of this project is based on action research, in which a team of researchers from SAME is closely working and collaborating with a group of teachers in the development of a solution based on the diagnosis of a problem identified (Bryman, 2012). The expected outcome of the project is to co-create a set of guidelines to support teachers in improving their practices. With this in mind, three phases were considered: 1) diagnosis of the problem based on a focus group carried out with leaders and teachers (September 2021); 2) development of solutions by creating a community of practice (December to June 2022); 3) delivering the final result (July 2022). This work aims to present and describe the insights of the teachers (n=13) engaged in this community of practice, regarding the co-creation process of developing solutions to enhancing pedagogical innovation in their schools. The data include the observation of the meetings by one researcher from SAME carried out since December 2021, and a questionnaire to be sent to this group of teachers, in the final of the second phase of the project. The expected outcomes will include the analyses of two dimensions, namely: 1) nature and content of the final solution (guidelines to improve teaching practice); 2) the community of practice value (level of collaboration and interaction, sense of belonging, focus on value, and sustainability). Implications for teachers’ professional development will be discussed and considered.info:eu-repo/semantics/publishedVersio

Bipolar HII regions - Morphology and star formation in their vicinity - I - G319.88++00.79 and G010.32−-00.15

Our goal is to identify bipolar HII regions and to understand their morphology, their evolution, and the role they play in the formation of new generations of stars. We use the Spitzer and Herschel Hi-GAL surveys to identify bipolar HII regions. We search for their exciting star(s) and estimate their distances using near-IR data. Dense clumps are detected using Herschel-SPIRE data. MALT90 observations allow us to ascertain their association with the central HII region. We identify Class 0/I YSOs using their Spitzer and Herschel-PACS emissions. These methods will be applied to the entire sample of candidate bipolar HII regions. This paper focuses on two bipolar HII regions, one interesting in terms of its morphology, G319.88$+$00.79, and one in terms of its star formation, G010.32$-$00.15. Their exciting clusters are identified and their photometric distances estimated to be 2.6 kpc and 1.75 kpc, respectively. We suggest that these regions formed in dense and flat structures that contain filaments. They have a central ionized region and ionized lobes perpendicular to the parental cloud. The remains of the parental cloud appear as dense (more than 10^4 per cm^3) and cold (14-17 K) condensations. The dust in the PDR is warm (19-25 K). Dense massive clumps are present around the central ionized region. G010.32-00.14 is especially remarkable because five clumps of several hundred solar masses surround the central HII region; their peak column density is a few 10^23 per cm^2, and the mean density in their central regions reaches several 10^5 per cm^3. Four of them contain at least one massive YSO; these clumps also contain extended green objects and Class II methanol masers. This morphology suggests that the formation of a second generation of massive stars has been triggered by the central bipolar HII region. It occurs in the compressed material of the parental cloud.Comment: 32 pages, 28 figures, to be published in A&

GIS for the determination of bioenergy potential in the centre region of Portugal

Every activity performed by mankind is directly or indirectly dependant on the use of energy. Fossil fuels are the main source used nowadays, a presumably limited energy source that may end in the near future (Boyle, 2004). World total annual consumption of all forms of primary energy increased drastically, and in the year 2006 it reached an estimated 10,800 Mtoe (million tons of oil equivalent) (U.S. Energy Information Administration [USEIA], 2009). The annual average energy consumption per person of the world population in 2006 was about 1.65 toe (ton of oil equivalent) (Population Reference Bureau, 2010). In 2010, the consumption of this energy may reach 12,800 Mtoe (USEIA, 2009) and in 2050 it is expected to achieve a range of 14,300 Mtoe to 23,900 Mtoe (International Energy Agency for Bioenergy [IEAB], 2009). We can also assume that it might possibly never end. The current energy crisis is affecting great part of the world population (U.S. Department of Energy, 2009).(undefined

Impact of cattle slurry treatment by separation and acidification on gaseous emissions after soil application

Objectives: Cattle-slurry management became a priority in many livestock farms and slurry treatment is used to increase the fertilizer value of slurry and/or minimize its environmental impact. Indeed, significant emissions of ammonia (NH3) and greenhouse gases (GHG) as nitrous oxide (N2O), carbon dioxide (CO2) and methane (CH4) can occur during and after slurry application to soil. Application of acidified slurry or liquid fraction (LF) obtained by solid-liquid separation are two alternatives to raw slurry application that have proven to be efficient to minimize ammonia emissions. However, few is known about its effect on GHG emissions. The aim of the present work was to assess the efficiency of cattle slurry treatment by acidification and/or solid liquid separation to mitigate ammonia (NH3) and greenhouse gases (GHG) emissions following surface application to a sandy loam soil

Neutrinos and Nucleosynthesis in Supernova

The type II supernova is considered as a candidate site for the production of heavy elements. The nucleosynthesis occurs in an intense neutrino flux, we calculate the electron fraction in this environment.Comment: RevTex4 style, 3 pages including 1 figure. Presented at Mexican School of Astrophysics 2002, Guanajuato, Mexico, 31 Jul - 7 Aug 2002. Final version to appear in the Proceedings of IX Mexican Workshop on Particles and Fields Physics Beyond the Standard Model, Colima Col. Mexico, November 17-22, 200

Influence of the particle size and animal slurry type on the potential of nitrogen mineralization after soil incorporation

RAMIRAN International ConferenceAnimal manures are rich in organic matter and nutrients, namely nitrogen (N) and, consequently, widely applied to soil as organic fertilizers. However, a large part of the nitrogen contained in animal manures is in the organic form and so not directly available for plants. Indeed, organic N has to be mineralized prior to plant uptake (Rees and Castle, 2002). Several manure characteristics as the C:N ratio (Chadwick et al., 2000), the lignin content (Kristensen, 1996) and the NH4 +/organic N ratio (Beauchamp and Paul, 1989) have been suggested as indicators of the plant-available N. More recently, Fangueiro et al. (2008) showed that the potential of N mineralization (PNM) of cattle slurry is inversely correlated with slurry particle size: finest fractions are the particle-size fractions from which N mineralization occurs in slurries whereas coarser fractions are associated with immobilization. Furthermore, Moller et al. (2002) reported that animal diet and anaerobic decomposition during storage in slurry channels and stores affect the slurry particle size distribution. Such information is of great interest since the finest slurry particle size should infiltrate the soil more easily and quickly relative to the coarser slurry particle size that should remain close to soil surface. Furthermore, mechanical slurry separation is now performed in many pig and dairy farms in order to improve slurry management in terms of nutrients utilization and reducing costs related to slurry storage. Slurry separation by screw press leads to a nutrient rich organic solid fraction (0.7– 3.2 mm particles) that may be composted and a liquid fraction that can be used for fertigation. In the present study, three types of slurry (pig, duck and cattle) were separated into 4 slurry particle size fractions (>2000 um, 2000-500 um, 500-100 um, <100 um) in order to assess the influence of the type of slurry and slurry particle size on the PNM after soil incorporation