De onde vêm os bebês? Útero artificial, bioética e direito: os possíveis impactos da ectogênese no campo da filiação – uma análise a partir do contexto jurídico brasileiro

Nos últimos tempos, os avanços biotecnológicos no campo da reprodução humana, sem dúvidas, acarretaram diversas alternativas procriativas para aqueles que buscam desempenhar um projeto parental através das chamadas técnicas de reprodução assistida. Desse modo, também nesse seguimento, pesquisas recentes vêm debruçando-se sobre o desenvolvimento da tecnologia do útero artificial, objetivando viabilizar a ectogênese, ou seja, o desenvolvimento de gestações extracorpóreas. Em razão disso, o presente artigo visou estudar, a partir do panorama jurídico brasileiro, os possíveis impactos que o desenvolvimento efetivo de tal ferramenta possa vir a causar na atribuição da filiação civil. Para tanto, a pesquisa pautou-se na técnica da revisão bibliográfica, no intuito de investigar quais seriam os parâmetros para estipulação dos vínculos filiatórios

A smooth path to plot hydrogen atom via Monte Carlo method.

In this paper, we show how to build a basic computer program using the Monte Carlo method to display the hydrogen atomic orbitals. For this, in a heuristic way, we applied a von Neumann acceptance-rejection method in simple problems of potential wells, and we end with the hydrogen orbitals representation. In this technique, we spread points uniformly on the 1D and 2D charts of probability density distributions, then we filtered points under these ?curves or surfaces?, and we extended this logic to 3D cases. Throughout the work, we also made some comments to help beginner students better understand the term ?wave function? present in the Schr?dinger equation. Also, we made all source code available at a third-party platform, for any purpose under the MIT license. Keywords: hydrogen atom, quantum mechanics, Monte Carlo method, Neumann acceptance-rejection method

A Contribuição do Sistema Público de Acesso à Informação para Governança dos Recursos Hídricos: o caso do Estado do Ceará / Contribution of the Public System of Access to Information for the Governance of Water Resources: the case study of Ceará

O propósito desse estudo é apresentar a contribuição do Sistema Público de Acesso à Informação do Estado do Ceará para a governança dos Recursos Hídricos, um sistema que, desde a sua concepção inicial, colocou como premissa básica a participação da sociedade no trato dos bens comuns. Aplicou-se o método de análise de conteúdo e realizou-se um levantamento de informações disponibilizadas na Plataforma Ceará Transparente e nos sítios institucionais das entidades e órgãos que, direta ou indiretamente, têm suas atribuições ligadas à governança dos recursos hídricos do Estado. As unidades de análise foram o volume de informação, o tipo de informação solicitada, o tempo médio de resposta e as deliberações do Conselho Estadual de Recursos Hídricos. Observou-se à redução do número de solicitações de informação aos Comitês de Acesso à Informação dos órgãos e entidades que cuidam da temática dos recursos hídricos ao passo em que se evidenciou o aumento de acessos ao Ceará Transparente. Pelas análises empreendidas, foi possível identificar a existência e funcionamento de um Sistema Público de Acesso à Informação para o fornecimento de informações, formando uma estrutura eficiente e flexível, capaz de permitir a implementação de melhorias na governança dos recursos hídricos do Estado do Ceará

PROTOCOLO PARA DIAGNÓSTICO MOLECULAR DE IMUNODEFICIÊNCIA E LEUCEMIA EM GATOS DOMÉSTICOS

Several affections that affect domestic cats, such as retroviruses, do not have effective treatment. This fact makes the study of these diseases relevant, due to the low healing efficacy and mostly lifelong character. Among the retroviruses that most affect felines are feline immunodeficiency (FIV) and feline leukemia (FeLV). The diagnosis is obtained by associating the clinical examination, which is generally inconclusive, with complementary laboratory tests. Molecular tests, such as the polymerase chain reaction (PCR), are efficient for proviral DNA detection and can be used in the diagnostic routine. Therefore, this study aimed to prove the efficiency of the molecular protocol Nested PCR to diagnose FIV and FeLV. For this purpose, blood and/ or bone marrow samples from 41 domestic cats were collected through venipuncture or bone marrow and sent to the Oncells Biotechnology laboratory. The following primer pairs were adopted for the Nested PCR: FF1 and FF2 for the first cycle, with an amplicon of 1325bp for FIV and 490bp for FeLV. For the second, the combination F14, F15, FE4, and FE7 was used, with an amplicon of 1138bp for FIV and 306bp for FeLV. The bands corresponding to those expected for FeLV were detected by observing the gels; however, in addition to other non-specific bands, bands corresponding to FIV were not observed. The results confirm the ability to detect the FeLV pathogen by the technique employed. Nevertheless new protocol adjustments are required.Diversas afecções que acometem os felinos domésticos, como as retroviroses, não possuem tratamento efetivo. Tal fato torna relevante o estudo dessas doenças, em virtude da baixa eficácia de cura e caráter majoritariamente vitalício. Entre as retroviroses que mais acometem os felinos estão a imunodeficiência felina (FIV) e a leucemia felina (FeLV). O diagnóstico é obtido pela associação do exame clínico, geralmente inconclusivo, com exames laboratoriais complementares. Testes moleculares, como a reação em cadeia da polimerase (PCR), são eficientes para a detecção do DNA proviral e podem ser utilizados na rotina diagnóstica. Diante disso, o objetivo deste estudo foi comprovar a eficiência do protocolo molecular Nested PCR para diagnosticar FIV e FeLV. Para tal, amostras de sangue e/ou medula de 41 gatos domésticos foram coletadas por meio de punção venosa ou de medula e encaminhadas ao laboratório Oncells Biotecnologia. Os seguintes pares de primers foram adotados para o Nested PCR: FF1 e FF2 para o primeiro ciclo, com um amplicon de 1325pb para FIV e 490pb para a FeLV. Para o segundo foi utilizada a combinação F14, F15, FE4 e FE7, com um amplicon de 1138pb para FIV e 306pb para FeLV. As bandas correspondentes às esperadas para FeLV foram detectadas pela observação dos géis, porém, além de outras bandas inespecíficas, não foram observadas bandas correspondentes à FIV. Os resultados confirmam a capacidade de detecção do patógeno da FeLV pela técnica empregada. No entanto, novos ajustes do protocolo são necessários

As tecnologias no processo de virtualização de emergência da educação durante a pandemia / The technologies in the emergency virtualization process of education during the pandemic

O objetivo deste estudo é analisar a importância da tecnologia na educação durante a pandemia da Covid-19. Nos âmbitos educacionais, nos quais a maneira de ensinar e aprender ganhou novas dimensões, a utilização de novas práticas pedagógicas, facilitam a aprendizagem; porém, para que isso ocorra, os agentes educacionais precisam saber manipulá-las e integrá-las no contexto educacional. Quando as escolas foram fechadas na maioria dos países em março de 2020 por causa da pandemia do Covid-19, os professores não tiveram outra opção a não ser transformar suas salas de aula em espaços de aprendizado online. Esta investigação centra-se precisamente em analisar os usos que os professores fizeram das tecnologias digitais durante o confinamento para se familiarizar com as suas práticas e utilizá-las para rever suas concepções de ensino e aprendizagem

The inventory of geological heritage of the state of São Paulo, Brazil: Methodological basis, results and perspectives

An inventory of geological sites based on solid and clear criteria is a first step for any geoconservation strategy. This paper describes the method used in the geoheritage inventory of the State of São Paulo, Brazil, and presents its main results. This inventory developed by the geoscientific community aimed to identify geosites with scientific value in the whole state, using a systematic approach. All 142 geosites representative of 11 geological frameworks were characterised and quantitatively evaluated according to their scientific value and risk of degradation, in order to establish priorities for their future management. An online database of the inventory is under construction, which will be available to be easily consulted and updated by the geoscientific community. All data were made available to the State Geological Institute as the backbone for the implementation of a future state geoconservation strategy.The authors acknowledge the Science Without Borders Programme, Process 075/2012, which supported this study and the São Paulo Research Foundation (FAPESP), Process 2011/17261-6. We also thanks C. Mazoca for his help with maps and figures.info:eu-repo/semantics/acceptedVersio

Geography and ecology shape the phylogenetic composition of Amazonian tree communities

Aim: Amazonia hosts more tree species from numerous evolutionary lineages, both young and ancient, than any other biogeographic region. Previous studies have shown that tree lineages colonized multiple edaphic environments and dispersed widely across Amazonia, leading to a hypothesis, which we test, that lineages should not be strongly associated with either geographic regions or edaphic forest types. Location: Amazonia. Taxon: Angiosperms (Magnoliids; Monocots; Eudicots). Methods: Data for the abundance of 5082 tree species in 1989 plots were combined with a mega-phylogeny. We applied evolutionary ordination to assess how phylogenetic composition varies across Amazonia. We used variation partitioning and Moran\u27s eigenvector maps (MEM) to test and quantify the separate and joint contributions of spatial and environmental variables to explain the phylogenetic composition of plots. We tested the indicator value of lineages for geographic regions and edaphic forest types and mapped associations onto the phylogeny. Results: In the terra firme and várzea forest types, the phylogenetic composition varies by geographic region, but the igapó and white-sand forest types retain a unique evolutionary signature regardless of region. Overall, we find that soil chemistry, climate and topography explain 24% of the variation in phylogenetic composition, with 79% of that variation being spatially structured (R$^{2}$ = 19% overall for combined spatial/environmental effects). The phylogenetic composition also shows substantial spatial patterns not related to the environmental variables we quantified (R$^{2}$ = 28%). A greater number of lineages were significant indicators of geographic regions than forest types. Main Conclusion: Numerous tree lineages, including some ancient ones (>66 Ma), show strong associations with geographic regions and edaphic forest types of Amazonia. This shows that specialization in specific edaphic environments has played a long-standing role in the evolutionary assembly of Amazonian forests. Furthermore, many lineages, even those that have dispersed across Amazonia, dominate within a specific region, likely because of phylogenetically conserved niches for environmental conditions that are prevalent within regions

Geography and ecology shape the phylogenetic composition of Amazonian tree communities

AimAmazonia hosts more tree species from numerous evolutionary lineages, both young and ancient, than any other biogeographic region. Previous studies have shown that tree lineages colonized multiple edaphic environments and dispersed widely across Amazonia, leading to a hypothesis, which we test, that lineages should not be strongly associated with either geographic regions or edaphic forest types.LocationAmazonia.TaxonAngiosperms (Magnoliids; Monocots; Eudicots).MethodsData for the abundance of 5082 tree species in 1989 plots were combined with a mega-phylogeny. We applied evolutionary ordination to assess how phylogenetic composition varies across Amazonia. We used variation partitioning and Moran's eigenvector maps (MEM) to test and quantify the separate and joint contributions of spatial and environmental variables to explain the phylogenetic composition of plots. We tested the indicator value of lineages for geographic regions and edaphic forest types and mapped associations onto the phylogeny.ResultsIn the terra firme and várzea forest types, the phylogenetic composition varies by geographic region, but the igapó and white-sand forest types retain a unique evolutionary signature regardless of region. Overall, we find that soil chemistry, climate and topography explain 24% of the variation in phylogenetic composition, with 79% of that variation being spatially structured (R2 = 19% overall for combined spatial/environmental effects). The phylogenetic composition also shows substantial spatial patterns not related to the environmental variables we quantified (R2 = 28%). A greater number of lineages were significant indicators of geographic regions than forest types.Main ConclusionNumerous tree lineages, including some ancient ones (>66 Ma), show strong associations with geographic regions and edaphic forest types of Amazonia. This shows that specialization in specific edaphic environments has played a long-standing role in the evolutionary assembly of Amazonian forests. Furthermore, many lineages, even those that have dispersed across Amazonia, dominate within a specific region, likely because of phylogenetically conserved niches for environmental conditions that are prevalent within regions

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

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