Structural Heterogeneity
Mostrando 1-12 de 290 artigos, teses e dissertações.
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1. Tandem Synthesis of Furanaphthoquinones via Enamines and Evaluation of Their Antiparasitic Effects against Trypanosoma cruzi
Furanaphthoquinones are well known in medicinal chemistry for exhibiting relevant structural heterogeneity and bioactivities. In this work, it was synthesized a series of furanaphthoquinones through a tandem reaction between lawsone (8) and cyclic ketones in the presence of morpholine. This strategy provides an efficient and general method for synthesizing f
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Association between ventricular premature contraction burden and ventricular repolarization duration
SUMMARY OBJECTIVE: Premature ventricular contraction is generally known as benign in the absence of structural heart disease; however, premature ventricular contraction-induced left ventricular systolic dysfunction or ventricular arrhythmias are defined in some cases. Ventricular repolarization duration differs between myocardial cells, which causes myocard
Revista da Associação Médica Brasileira. Publicado em: 2022
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3. Attention-deficit/hyperactivity disorder and brain metabolites from proton magnetic resonance spectroscopy: a systematic review and meta-analysis protocol
Abstract Despite major advances in the study of the brain, investigations on neurochemistry in vivo still lack the solid ground of more established methods, such as structural and functional magnetic resonance imaging. Proton magnetic resonance spectroscopy (MRS) is a technique that might potentially fill in this gap. Nevertheless, studies using this approac
Trends Psychiatry Psychother.. Publicado em: 2021-03
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4. Richness of Chrysomelidae (Coleoptera) depends on the area and habitat structure in semideciduous forest remnants
RESUMO A área de uma mancha de habitat pode aumentar a riqueza local de espécies tanto diretamente (pelo balanço entre imigração e extinção) quanto indiretamente (por aumentar a heterogeneidade do habitat e/ou como efeito do esforço amostral). Ambientes mais heterogêneos apresentam maior variedade de recursos e condições permitindo a coexistência
Iheringia, Sér. Zool.. Publicado em: 02/12/2019
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5. Heterogeneidade ambiental e estrutura da vegetação arbustivo-arbórea em três áreas de Cerrado sentido restrito no Sudoeste goiano
Resumo A variação fitofisionômica do Cerrado brasileiro é intensa e estudos fitossociológicos podem fornecer subsídios sobre quais fatores são responsáveis por essa heterogeneidade ambiental. Nesse sentido, esse estudo teve o objetivo de avaliar a estrutura da vegetação lenhosa de três áreas de cerrado sentido restrito, no município de Jataí -
Ciênc. Florest.. Publicado em: 30/09/2019
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6. Efeitos de atributos ambientais na biodiversidade de formigas sob diferentes usos do solo
Resumo O objetivo foi avaliar a influência de variáveis ambientais sobre a fauna de formigas em um fragmento de floresta nativa e em áreas cultivadas. Os dados foram coletados no município de Seropédica - RJ, nas estações chuvosa e seca, em um cultivo de bananas (Musa pariadisiaca L.), uma agrofloresta, um cafezal (Coffea conephora Pierre) sombreado c
Ciênc. Florest.. Publicado em: 30/09/2019
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7. A atenção primária em regiões de saúde: política, estrutura e organização
Resumo: A atenção primária à saúde (APS) concebida como coordenadora do cuidado e ordenadora da rede regionalizada de atenção à saúde (RAS) é um dos condicionantes da dinâmica regional da saúde. O objetivo do artigo é identificar as dimensões política, de estrutura e de organização da APS em diferentes regiões do Brasil; assume-se que estas
Cad. Saúde Pública. Publicado em: 17/06/2019
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8. Neotectonics as a structural control of the boundaries of the Pantanal Matogrossense Sub-Regions
Abstract: Characterized by fluvio-alluvial sedimentation processes, the heterogeneity in the Pantanal Basin allows its division in several sub-regions, which present natural characteristics of their own. It is possible to find in the literature different proposals to subdivide the Pantanal plain, which vary in total area and number of sub-regions. Each autho
An. Acad. Bras. Ciênc.. Publicado em: 08/04/2019
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9. The Impact of Traditional Silvopastoral System on the Mixed Ombrophilous Forest Remnants
ABSTRACT The results of an evaluation of the impact of traditional silvopastoral system on floristic and phytosociology of the Mixed Ombrophilous Forest (MOF) remnants, named caívas, in the North Plateau of Santa Catarina, South of Brazil are shown here to contribute to a better understanding of the impact of human activities on natural environments,. Ther
Floresta Ambient.. Publicado em: 13/09/2018
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10. Changes in the taxonomic structure of periphytic algae on a free-floating macrophyte (Utricularia foliosa L.) in relation to macrophyte richness over seasons
ABSTRACT Periphyton has a strong relationship with aquatic macrophytes, which are key components of spatial heterogeneity in the littoral zone. We evaluated the relationship between the community structure of periphytic algae on Utricularia foliosa and macrophyte richness and coverage and limnological variables in a shallow reservoir. Water sampling for phys
Acta Bot. Bras.. Publicado em: 30/07/2018
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11. Simple but not simpler: a systematic review of Markov models for economic evaluation of cervical cancer screening
The aim of this study was to critically evaluate the quality of the models used in economic evaluations of screening strategies for cervical cancer prevention. We systematically searched multiple databases, selecting model-based full economic evaluations (cost-effectiveness analyses, cost-utility analyses, and cost-benefit analyses) of cervical cancer screen
Clinics. Publicado em: 10/07/2018
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12. Together yet separate: variation in soil chemistry determines differences in the arboreal-shrub structure of two contiguous rupestrian environments
ABSTRACT Rupestrian landscapes are characterized by vegetation mosaics comprised of different plant communities and strongly linked to environmental filters. These environments are nutrient-impoverished, and possess water retention deficits and high solar exposure. This study aimed to determine whether chemical properties of the soil shape the arboreal-shrub
Acta Bot. Bras.. Publicado em: 02/07/2018