213 research outputs found

    Table3_Rescuing the Brazilian Agave breeding program: morphophysiological and molecular characterization of a new germplasm.xlsx

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    Agaves have been a valuable resource in dryland areas for centuries, providing fibers (sisal), food, and beverages. However, the advent of synthetic fibers has led to a decrease in research on Agave, resulting in the cessation of breeding programs in Brazil. With the rise of climate change, there is renewed interest in Agave for its potential as a biofuel feedstock in semiarid regions. Since 2016, we have been collecting Agave accessions throughout the country and retrieving what is left of Brazil‚Äôs original breeding program to establish a new germplasm bank. Here, we evaluated 21 of those accessions growing in the field. We used molecular markers and morphophysiological traits to characterize the plants. Based on the Mayahuelin molecular marker, we were able to reconstruct a phylogeny for the Brazilian accessions. The morphophysiological traits explained 34.6% of the phenotypic variation in the dataset, with physiological traits such as leaf water content, effective quantum efficiency of photosystem II (ő¶PSII), and specific leaf mass (SLM) as the most significant traits. Specifically, we evaluated nine Agave species and found that the physiological traits, rather than the morphological ones, were the most significant. Leaf water content was negatively correlated with specific leaf mass, which could be used as a marker for selecting cultivars with higher biomass accumulation. Interestingly, ő¶PSII and chlorophyll content were negatively correlated, suggesting photochemical adaptations throughout the rosette. Molecular and phenotypic data suggest that A. amaniensis, which is frequently considered a synonym of A. sisalana, is effectively another species. Overall, this study provides valuable information on the physiological traits of Brazilian Agave accessions and is a starting point for selecting more productive and climate-resilient cultivars for biorenewables production.</p

    CARACTERIZA√á√ÉO EPIDEMIOL√ďGICA DE PACIENTES COM INFEC√á√ēES DE PELE NO ESTADO DA BAHIA: UM ESTUDO DESCRITIVO

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    Introdu√ß√£o/Objetivo: A pele √© considerada o maior √≥rg√£o do corpo humano. Ela exerce importante fun√ß√£o de barreira entre o organismo e o meio externo, al√©m de atuar despertando sensa√ß√Ķes e traduzindo a impress√£o social de cada indiv√≠duo. Pode ser acometida por afec√ß√Ķes a ela restritas ou apresentar manifesta√ß√Ķes cl√≠nicas de altera√ß√Ķes sist√™micas. As doen√ßas infecciosas da pele s√£o frequentes e constituem importantes causas de demanda aos servi√ßos de sa√ļde. Assim, o objetivo desse estudo foi descrever as caracter√≠sticas epidemiol√≥gicas de pacientes internados por infec√ß√£o de pele, entre 2012 e 2022, no estado da Bahia, comparando-as com a regi√£o Nordeste. M√©todos: Trata-se de um estudo epidemiol√≥gico descritivo, retrospectivo e quantitativo, cujos dados foram obtidos no Sistema de Informa√ß√£o Hospitalar do Sistema √önico de Sa√ļde (SIH-SUS) e transferidos para an√°lise quantitativa no software Excel. A popula√ß√£o do estudo foi constitu√≠da por pacientes com infec√ß√£o de pele internados no per√≠odo dezembro de 2012 a novembro de 2022. As vari√°veis foram ano de atendimento, regime hospitalar, idade, sexo, ra√ßa/cor correlacionando com interna√ß√Ķes, tempo de perman√™ncia e √≥bito. Por se tratar de um banco de dom√≠nio p√ļblico, n√£o foi necess√°rio submeter o projeto ao Comit√™ de √Čtica em Pesquisa. Resultados: No per√≠odo analisado, a Bahia foi respons√°vel por 62.822 das 248.316 interna√ß√Ķes no Nordeste, sendo o maior n√ļmero concentrado no ano de 2019 (17.133). O tempo m√©dio de perman√™ncia hospitalar foi de 6,94 dias. O regime de atendimento predominante foi o p√ļblico, cerca de 20,59%, contra 7,79%, do servi√ßo privado. Al√©m disso, a faixa et√°ria dominante foi entre 1 e 4 anos, com menor preval√™ncia de internamentos de pacientes com 80 anos ou mais. O g√™nero mais frequente foi o masculino, com 55,65% e 57,01%, na Bahia e no Nordeste, respectivamente. Com rela√ß√£o √† distribui√ß√£o de ra√ßa/cor, a mais prevalente foi preta e parda. Ademais, comparando-se a regi√£o Nordeste, a Bahia √© o segundo estado com maior n√ļmero de hospitaliza√ß√Ķes. Entretanto, ao observar o n√ļmero de √≥bitos, a Bahia se destaca. Conclus√£o: Nesse contexto, √© poss√≠vel notar que a Bahia √© o estado com maior n√ļmero de √≥bitos por infec√ß√Ķes de pele no Nordeste, mesmo n√£o apresentando o maior quantitativo de interna√ß√Ķes. Al√©m disso, no perfil epidemiol√≥gico dos internamentos predominam pacientes pedi√°tricos, masculinos, pretos e pardos que foram atendidos pelos servi√ßos p√ļblicos

    Mapping density, diversity and species-richness of the Amazon tree flora

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    Using 2.046 botanically-inventoried tree plots across the largest tropical forest on Earth, we mapped tree species-diversity and tree species-richness at 0.1-degree resolution, and investigated drivers for diversity and richness. Using only location, stratified by forest type, as predictor, our spatial model, to the best of our knowledge, provides the most accurate map of tree diversity in Amazonia to date, explaining approximately 70% of the tree diversity and species-richness. Large soil-forest combinations determine a significant percentage of the variation in tree species-richness and tree alpha-diversity in Amazonian forest-plots. We suggest that the size and fragmentation of these systems drive their large-scale diversity patterns and hence local diversity. A model not using location but cumulative water deficit, tree density, and temperature seasonality explains 47% of the tree species-richness in the terra-firme forest in Amazonia. Over large areas across Amazonia, residuals of this relationship are small and poorly spatially structured, suggesting that much of the residual variation may be local. The Guyana Shield area has consistently negative residuals, showing that this area has lower tree species-richness than expected by our models. We provide extensive plot meta-data, including tree density, tree alpha-diversity and tree species-richness results and gridded maps at 0.1-degree resolution

    DataSheet1_Rescuing the Brazilian Agave breeding program: morphophysiological and molecular characterization of a new germplasm.pdf

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    Agaves have been a valuable resource in dryland areas for centuries, providing fibers (sisal), food, and beverages. However, the advent of synthetic fibers has led to a decrease in research on Agave, resulting in the cessation of breeding programs in Brazil. With the rise of climate change, there is renewed interest in Agave for its potential as a biofuel feedstock in semiarid regions. Since 2016, we have been collecting Agave accessions throughout the country and retrieving what is left of Brazil‚Äôs original breeding program to establish a new germplasm bank. Here, we evaluated 21 of those accessions growing in the field. We used molecular markers and morphophysiological traits to characterize the plants. Based on the Mayahuelin molecular marker, we were able to reconstruct a phylogeny for the Brazilian accessions. The morphophysiological traits explained 34.6% of the phenotypic variation in the dataset, with physiological traits such as leaf water content, effective quantum efficiency of photosystem II (ő¶PSII), and specific leaf mass (SLM) as the most significant traits. Specifically, we evaluated nine Agave species and found that the physiological traits, rather than the morphological ones, were the most significant. Leaf water content was negatively correlated with specific leaf mass, which could be used as a marker for selecting cultivars with higher biomass accumulation. Interestingly, ő¶PSII and chlorophyll content were negatively correlated, suggesting photochemical adaptations throughout the rosette. Molecular and phenotypic data suggest that A. amaniensis, which is frequently considered a synonym of A. sisalana, is effectively another species. Overall, this study provides valuable information on the physiological traits of Brazilian Agave accessions and is a starting point for selecting more productive and climate-resilient cultivars for biorenewables production.</p

    Unraveling Amazon tree community assembly using Maximum Information Entropy: a quantitative analysis of tropical forest ecology

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    In a time of rapid global change, the question of what determines patterns in species abundance distribution remains a priority for understanding the complex dynamics of ecosystems. The constrained maximization of information entropy provides a framework for the understanding of such complex systems dynamics by a quantitative analysis of important constraints via predictions using least biased probability distributions. We apply it to over two thousand hectares of Amazonian tree inventories across seven forest types and thirteen functional traits, representing major global axes of plant strategies. Results show that constraints formed by regional relative abundances of genera explain eight times more of local relative abundances than constraints based on directional selection for specific functional traits, although the latter does show clear signals of environmental dependency. These results provide a quantitative insight by inference from large-scale data using cross-disciplinary methods, furthering our understanding of ecological dynamics.</p

    A ozonioterapia como tratamento complementar do pé diabético

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    The aim of this paper was to present the use of ozone therapy as an adjuvant treatment in cases of diabetic foot ulcers and to compare traditional treatment and traditional treatment associated with ozone therapy. This is an integrative review in which searches were carried out in the PubMed, VHL, ScienceDirect and SciELO databases, without date or language restrictions. The results demonstrate that ozone, as a complementary measure to conventional treatment, has shown promise in the treatment of diabetic foot and ulcers, as it helps with healing, circulation, the immune system and has no adverse effects. Diabetes Mellitus, if left untreated, can lead to complications, such as diabetic foot - a syndrome that causes neuropathy, ischemia and infections that lead to the development of diabetic foot ulcers. Conventional treatment for diabetic foot ulcers consists of the use of antibiotics, debridement of the lesions and, in some cases, amputation of the limbs; therefore, ozone therapy has been used to complement the treatment. The results obtained showed that the use of ozone is promising in patients with diabetic foot ulcers.O objetivo deste trabalho foi apresentar o uso da ozonioterapia como tratamento coadjuvante em casos de √ļlcera de p√© diab√©tico e comparar o tratamento tradicional e o tratamento tradicional associado √† ozonioterapia. Trata-se de uma revis√£o integrativa em que foram realizadas pesquisas nas bases de dados PubMed, BVS, ScienceDirect e SciELO, sem restri√ß√Ķes de datas ou idiomas. Os resultados demonstram que o oz√īnio, como medida complementar ao tratamento convencional, se mostrou promissor no tratamento do p√© diab√©tico e das √ļlceras, por auxiliar na cicatriza√ß√£o, circula√ß√£o, no sistema imunol√≥gico e n√£o apresenta efeitos adversos. A Diabetes Mellitus, se n√£o tratada, pode acarretar complica√ß√Ķes, como o p√© diab√©tico - uma s√≠ndrome que ocasiona neuropatia, isquemia e infec√ß√Ķes que cursam com o desenvolvimento das √ļlceras do p√© diab√©tico. O tratamento convencional para as √ļlceras do p√© diab√©tico consiste na utiliza√ß√£o de antibi√≥ticos, desbridamento das les√Ķes e, em alguns casos, a amputa√ß√£o dos membros, assim, a ozonioterapia vem sendo utilizada para complementar o tratamento. Os resultados obtidos mostraram que o uso do oz√īnio √© promissor nos pacientes portadores de √ļlcera do p√© diab√©tico

    Encruzilhada. Artigos dos estudantes de arte contempor√Ęnea da Unifesp (2023)

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    A arte contempor√Ęnea √©, acima de tudo, multidisciplinar. A experimenta√ß√£o e a quebra de limites s√£o primordiais para a exist√™ncia desse campo t√£o vibrante e diversificado que permite que os artistas se expressem de forma livre, provocativa, desconcertante, e at√© controversa, incentivando o p√ļblico a refletir sobre a percep√ß√£o do mundo ao seu redor. ENCRUZILHADA √© um projeto que re√ļne, n√£o s√≥, uma s√©rie de artigos, mas a tentativa de ampliar os horizontes da arte contempor√Ęnea, dialogando com suas inquieta√ß√Ķes e desafiando as hierarquias estabelecidas

    Pervasive gaps in Amazonian ecological research

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    Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5‚Äď7 vast areas of the tropics remain understudied.8‚Äď11 In the American tropics, Amazonia stands out as the world‚Äôs most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13‚Äď15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon‚Äôs biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region‚Äôs vulnerability to environmental change. 15%‚Äď18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio

    Mapping density, diversity and species-richness of the Amazon tree flora

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    Using 2.046 botanically-inventoried tree plots across the largest tropical forest on Earth, we mapped tree species-diversity and tree species-richness at 0.1-degree resolution, and investigated drivers for diversity and richness. Using only location, stratified by forest type, as predictor, our spatial model, to the best of our knowledge, provides the most accurate map of tree diversity in Amazonia to date, explaining approximately 70% of the tree diversity and species-richness. Large soil-forest combinations determine a significant percentage of the variation in tree species-richness and tree alpha-diversity in Amazonian forest-plots. We suggest that the size and fragmentation of these systems drive their large-scale diversity patterns and hence local diversity. A model not using location but cumulative water deficit, tree density, and temperature seasonality explains 47% of the tree species-richness in the terra-firme forest in Amazonia. Over large areas across Amazonia, residuals of this relationship are small and poorly spatially structured, suggesting that much of the residual variation may be local. The Guyana Shield area has consistently negative residuals, showing that this area has lower tree species-richness than expected by our models. We provide extensive plot meta-data, including tree density, tree alpha-diversity and tree species-richness results and gridded maps at 0.1-degree resolution
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