86 research outputs found
A global classification of coastal flood hazard climates associated with large-scale oceanographic forcing
Coastal communities throughout the world are exposed to numerous and increasing threats, such as coastal flooding and erosion, saltwater intrusion and wetland degradation. Here, we present the first global-scale analysis of the main drivers of coastal flooding due to large-scale oceanographic factors. Given the large dimensionality of the problem (e.g. spatiotemporal variability in flood magnitude and the relative influence of waves, tides and surge levels), we have performed a computer-based classification to identify geographical areas with homogeneous climates. Results show that 75% of coastal regions around the globe have the potential for very large flooding events with low probabilities (unbounded tails), 82% are tide-dominated, and almost 49% are highly susceptible to increases in flooding frequency due to sea-level rise.A.R., F.J.M. and P.C. acknowledge the support of the Spanish ‘Ministerio de Economia y Competitividad’ under Grants BIA2014-59643-R and BIA2015-70644-R. This work was critically supported by the US Geological Survey under Grant/Cooperative Agreement G15AC00426 and from the US DOD Strategic Environmental Research and Development Program (SERDP Project RC-2644) through the NOAA National Centers for Environmental Information (NCEI). Dynamic atmospheric corrections (storm surge) are produced by CLS Space Oceanography Division using the Mog2D model from Legos and distributed by Aviso, with support from CNES (http://www.aviso.altimetry.fr/). Marine data from global reanalysis are provided by IHCantabria and are available for research purposes upon request at [email protected]
Stringent response of Escherichia coli: revisiting the bibliome using literature mining
Understanding the mechanisms responsible for cellular responses depends on the systematic collection and analysis of information on the main biological concepts involved. Indeed, the identification of biologically relevant concepts in free text, namely genes, tRNAs, mRNAs, gene products and small molecules, is crucial to capture the structure and functioning of different responses.
Results
In this work, we review literature reports on the study of the stringent response in Escherichia coli. Rather than undertaking the development of a highly specialised literature mining approach, we investigate the suitability of concept recognition and statistical analysis of concept occurrence as means to highlight the concepts that are most likely to be biologically engaged during this response. The co-occurrence analysis of core concepts in this stringent response, i.e. the (p)ppGpp nucleotides with gene products was also inspected and suggest that besides the enzymes RelA and SpoT that control the basal levels of (p)ppGpp nucleotides, many other proteins have a key role in this response. Functional enrichment analysis revealed that basic cellular processes such as metabolism, transcriptional and translational regulation are central, but other stress-associated responses might be elicited during the stringent response. In addition, the identification of less annotated concepts revealed that some (p)ppGpp-induced functional activities are still overlooked in most reviews.
Conclusions
In this paper we applied a literature mining approach that offers a more comprehensive analysis of the stringent response in E. coli. The compilation of relevant biological entities to this stress response and the assessment of their functional roles provided a more systematic understanding of this cellular response. Overlooked regulatory entities, such as transcriptional regulators, were found to play a role in this stress response. Moreover, the involvement of other stress-associated concepts demonstrates the complexity of this cellular response
Satisfação corporal associada à gordura corporal e estado nutricional em jovens basquetebolistas
O objetivo deste estudo foi comparar e verificar a possibilidade de associação entre a satisfação corporal (SC), classificações de estado nutricional (EN) e gordura corporal (GC) em jovens basquetebolistas masculinos. Participaram da pesquisa 93 adolescentes com idades de 10 a 16 anos. A SC foi avaliada pelo Body Shape Questionnaire. Foram coletadas massa corporal, estatura e dobras cutâneas para classificar o EN (kg/m²) e medir a GC, respectivamente. Realizaram-se os testes Ancova e Qui-quadrado no "software" SPSS 17.0. Identificaram-se diferenças estatisticamente significativas (p < 0,05) de SC entre classificações de EN e GC. Encontrou-se associação significativa (p < 0,05) entre SC e EN, assim como entre SC e GC (p < 0,05). Os resultados confirmaram diferenças e associação da SC com o EN e GC em jovens basquetebolistas
Fatores associados à amamentação na primeira hora de vida
OBJETIVO: Identificar fatores associados à amamentação na primeira hora de vida (Passo 4 da Iniciativa Hospital Amigo da Criança). MÉTODOS: Foi realizado estudo transversal com amostra representativa de parturientes em maternidades do Rio de Janeiro, RJ, entre 1999 e 2001. Foram excluídos recém-nascidos ou mães com restrição ao aleitamento materno, resultando em amostra de 8.397 binômios. Foi adotado modelo Poisson com efeitos aleatórios ao nível das maternidades, em abordagem hierarquizada com três níveis: distal, intermediário e proximal para características maternas, do recém-nascido, e de assistência ao pré-natal e hospitalar. RESULTADOS: Amamentaram na primeira hora de vida 16% das mães. O aleitamento materno nesse período foi menos prevalente entre os recém-nascidos com intercorrências imediatas após o parto (RP = 0,47; IC99% 0,15;0,80); entre as mães que não tiveram contato com os recém-nascidos na sala de parto (RP = 0,62; IC99% 0,29;0,95), as que tiveram parto cesariano (RP = 0,48; IC99% 0,24;0,72); e cujo parto ocorreu em maternidade privada (RP = 0,06; IC99% 0,01;0,19) ou conveniada com o Sistema Único de Saúde (RP = 0,16; IC99% 0,01;0,30). O efeito de contexto das maternidades foi estatisticamente significativo. CONCLUSÕES: Em nível individual, a amamentação na primeira hora de nascimento foi prejudicada por práticas inadequadas nas maternidades, em particular as privadas e conveniadas com o Sistema Único de Saúde. O efeito de grupo das maternidades e a ausência de fatores individuais maternos que expliquem o desfecho sugerem que as mães têm pouco ou nenhum poder de decisão sobre essa amamentação e dependem das práticas institucionais vigentes nas maternidades
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