Diplomado de profundización en fundamentos de salud pública

En la investigación realizada se dedujo que la malaria es un problema mundial, que afecta a poblaciones vulnerables como el caso del departamento del Chocó en nuestro país, ya que por su versatilidad climática es foco para la proliferación del mosquito que la transmite.In the investigation carried out, it was deduced that malaria is a worldwide problem, which affects vulnerable populations such as the case of the department of Chocó in our country, since due to its climatic versatility it is the focus for the proliferation of the mosquito that transmits it

Synthesis of rhenacyclopentadienes and eta(2):eta(2)-diyne complexes from a labile dirhenium carbonyl and pi-conjugated 1,7-octadiynes: Structural and photophysical characterization

A series of dirhenium carbonyl compounds containing pi-conjugated diyne ligands and symmetrical 2,5-bis(aryl)rhenacyclopentadienes has been synthesized by reaction of [Re-2(CO)(8)(CH3CN)(2)] and 1,8bis(aryl)-1,7-octadiyne derivatives [aryl = 2-thienyl (a), 2-pyridyl (b), 2-quinolyl (c) and 9-phenanthrenyl (d)]. We found that diyne ligands undergo coordination to the labile rhenium dinuclear in bridging or chelate modes, however, the formation of metallacyclopentadiene complexes was favorably observed. All products were fully characterized by IR, NMR, ESI-MS, UV-Vis and fluorescence spectroscopy. Single-crystal structures of three new 2,5-bis(aryl) rhenacyclopentadienes [Re-2(CO)(7)(mu-eta(1):eta(1):eta(2):eta(2)-C16H14S2)] (1a), [Re-2(CO)(6)(CH3CN)(mu-eta(1):eta(1):eta(2):eta(2)-C16H14S2)] (2a) and [Re-2(CO)(6)(CH3CN)(mu-eta(1):eta(1):eta(2):eta(2)-C26H20N2)] (2c) are described. DFT calculations were used to evaluate the proposed geometries for the two eta(2):eta(2)-diyne complexes [Re-2(CO)(6)(CH3CN)(2)(mu-eta(2):eta(2)-C18H16N2)] (3b), [Re-2(CO)(6)(CH3CN)(2)(eta(2):eta(2)-C26H20N2)] (4c), and the rhenacyclopentadiene [Re-2(CO)(6)(CH3CN)(mu-eta(1):eta(1):eta(2):eta(C36H26)-C-2)] (2d). The photophysical properties of all complexes were assessed, in that they exhibited fluorescence between 408 and 599 nm with quantum yields of Phi(f) = 0.02-0.09. An exceptional fluorescence quantum yield of Phi(f) = 0.64 was found for [Re-2(CO)(6)(CH3CN)(2)(eta(2):eta(2)-C26H20N2)] (4c), which has been attributed to its rigid chelate structure. This work represents the second example of fluorescent 2,5-bis(aryl)rhenaclyclopendadienes reported up to date8813444CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP310779/2016-22013/22127-2Instituto Venezolano de Investigaciones Cientificas [1082]; Fundacao de Amparo a Pesquisa do Estado de Sao Paulo - FAPESPFundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2013/22127-2]; INOMAT - INCT for Science, Technology and Innovation in Functional Complex Materials [2014/50906-9]; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico - CNPqNational Council for Scientific and Technological Development (CNPq) [310779/2016-2

Brazilian Flora 2020: Leveraging the power of a collaborative scientific network

International audienceThe shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impediment and the biodiversity crisis are widely recognized, highlighting the urgent need for reliable taxonomic data. Over the past decade, numerous countries worldwide have devoted considerable effort to Target 1 of the Global Strategy for Plant Conservation (GSPC), which called for the preparation of a working list of all known plant species by 2010 and an online world Flora by 2020. Brazil is a megadiverse country, home to more of the world's known plant species than any other country. Despite that, Flora Brasiliensis, concluded in 1906, was the last comprehensive treatment of the Brazilian flora. The lack of accurate estimates of the number of species of algae, fungi, and plants occurring in Brazil contributes to the prevailing taxonomic impediment and delays progress towards the GSPC targets. Over the past 12 years, a legion of taxonomists motivated to meet Target 1 of the GSPC, worked together to gather and integrate knowledge on the algal, plant, and fungal diversity of Brazil. Overall, a team of about 980 taxonomists joined efforts in a highly collaborative project that used cybertaxonomy to prepare an updated Flora of Brazil, showing the power of scientific collaboration to reach ambitious goals. This paper presents an overview of the Brazilian Flora 2020 and provides taxonomic and spatial updates on the algae, fungi, and plants found in one of the world's most biodiverse countries. We further identify collection gaps and summarize future goals that extend beyond 2020. Our results show that Brazil is home to 46,975 native species of algae, fungi, and plants, of which 19,669 are endemic to the country. The data compiled to date suggests that the Atlantic Rainforest might be the most diverse Brazilian domain for all plant groups except gymnosperms, which are most diverse in the Amazon. However, scientific knowledge of Brazilian diversity is still unequally distributed, with the Atlantic Rainforest and the Cerrado being the most intensively sampled and studied biomes in the country. In times of “scientific reductionism”, with botanical and mycological sciences suffering pervasive depreciation in recent decades, the first online Flora of Brazil 2020 significantly enhanced the quality and quantity of taxonomic data available for algae, fungi, and plants from Brazil. This project also made all the information freely available online, providing a firm foundation for future research and for the management, conservation, and sustainable use of the Brazilian funga and flora