Stable Variation
Mostrando 1-12 de 455 artigos, teses e dissertações.
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1. A New Miniaturized Low-Profile and Stable Dual-Band FSS with 2.5D Structure for ISM Bands
Abstract Based on 2.5-Dimensional (2.5D) frequency selective surface (FSS) structures, a new miniaturized frequency selective surface structure is proposed in this work to operate as a bandreject filter in the 2.4 GHz (2400 to 2483.5 MHz) and 5 GHz (5150 to 5350 MHz and 5470 to 5725 MHz) ISM (Industrial, Scientific, and Medical) bands. The FSS has the metall
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Porosity of CHA Zeolite Driving the Formation of Polyaromatic Coke Species in the Methanol to Olefins Reaction
The pore size of the chabazite structure is exceptionally suitable for the methanol to olefins (MTO) reaction. The reaction has an induction period required for the formation of a hydrocarbon pool (HP), usually composed of aromatic compounds of different sizes. HP is alkylated by methanol and afterward cracked, leading to the formation of olefins. Despite th
J. Braz. Chem. Soc.. Publicado em: 2021-05
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3. Macrophyte functional composition is stable across a strong environmental gradient of a Neotropical floodplain
ABSTRACT Ecological communities are compared by the similarity or distinctness of their species. Taking into account community composition at a determined site, one could expect a similar reasoning to explain differences in both taxonomic and functional composition due to environmental gradients. We aim to evaluate spatial variation in functional composition
Acta Bot. Bras.. Publicado em: 2021-03
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4. Mortality Trends from Cardiovascular Diseases in the State of Bahia, Brazil, between 2000 and 2015
Abstract Background: Mortality from cardiovascular diseases has reduced in Brazil in recent decades, but this phenomenon is not clear in the northeast region of the country. Objectives: To describe the mortality trends from cardiovascular disease in Bahia from 2000-2015, in total population and by sex and age groups, and by specific causes (ischemic heart
Int. J. Cardiovasc. Sci.. Publicado em: 2020-12
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5. Pré-Despacho de um Sistema Hidrotérmico com Manobras e Restrições de Rampa
RESUMO. Os métodos de pontos interiores primais-duais foram utilizados para o problema de minimização do custo de operação do pré-despacho DC de um sistema de potência hidroelétrico e hidrotérmico onde ocorrem adicionalmente manobras programadas e restrições de rampa. Com a variação da demanda, se faz necessário realizar algumas manobras progra
TEMA (São Carlos). Publicado em: 20/12/2019
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6. Validation of reference genes for gene expression studies in bovine oocytes and cumulus cells derived from in vitro maturation
Abstract Quantitative real-time PCR (qPCR) is a valuable tool for gene expression studies and it is necessary to choose an ideal endogenous reference gene for data normalization. This work studied a set of reference genes in oocytes and cumulus cells of COCs (Cumulus-Oocyte Complexes) that are suitable for relative gene expression analyses after in vitro mat
Anim. Reprod.. Publicado em: 25/11/2019
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7. Mapping of QTL for total spikelet number per spike on chromosome 2D in wheat using a high-density genetic map
Abstract Total spikelet number per spike (TSS) is one of the key components of grain yield in wheat. Chromosome (chr.) 2D contains numerous genes that control TSS. In this study, we evaluated 138 F8 recombinant inbred lines (RILs) derived from an F2 population of a synthetic hexaploid wheat line (SHW-L1) and a common wheat cultivar (Chuanmai 32) for TSS in s
Genet. Mol. Biol.. Publicado em: 14/11/2019
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8. MODIFICATION OF THE SPINOPELVIC PARAMETERS WITH SURGICAL POSITIONING AND THE ROLE OF THE HIP
RESUMO A dor lombar pós-operatória está relacionada a alterações nos parâmetros sagitais e espinopélvicos. Uma fusão lombar que não mantém ou piora a lordose fisiológica altera o equilíbrio sagital. Objetivo: Analisar a variação espinopélvica em diferentes posições cirúrgicas. Métodos: Estudo prospectivo, analítico e comparativo de espi
Coluna/Columna. Publicado em: 14/11/2019
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9. Genotype x environment interaction analysis of multi-environment wheat trials in India using AMMI and GGE biplot models
Abstract Fifty wheat genotypes were evaluated at nine diverse locations in India to identify high-yielding and stable genotypes. The analysis of variance based on additive main effects and multiplicative interaction (AMMI) indicated significant genotype, environment and genotype - environment (GE) interactions, with a total variation of 5.99, 20.23 and 73.77
Crop Breed. Appl. Biotechnol.. Publicado em: 31/10/2019
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10. Aquatic Oligochaete Communities in Amazonian Streams, Saracá-Taquera National Forest, Pará, Brazil
Resumo: O objetivo deste trabalho foi analisar a distribuição da comunidade de oligoquetos em relação às variáveis físico-químicas da coluna da água, variação estrutural do ambiente, e substratos predominantes em riachos amazônicos conservados na FLONA Saracá-Taquera, noroeste do Pará, Brasil. Oligochaetes são amplamente utilizados como bioind
Biota Neotrop.. Publicado em: 24/10/2019
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11. Premature mortality caused by the main chronic noncommunicable diseases in the Brazilian states
RESUMO Objetivo: Verificar a variação da taxa de mortalidade prematura pelo conjunto das principais doenças crônicas não transmissíveis. Método: Estudo ecológico de séries temporais, que utilizou dados secundários do Sistema de Informações sobre Mortalidade, de 2006 a 2014, das 26 unidades federativas e do Distrito Federal. Foram incluídos ób
Rev. Bras. Enferm.. Publicado em: 21/10/2019
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12. Association mapping of drought tolerance indices in wheat: QTL-rich regions on chromosome 4A
ABSTRACT Drought is likely the main abiotic stress that affects wheat yield. The identification of drought-tolerant genotypes represents an effective way of dealing with the continuous decrease in water resources as well as the increase in world population. The aim of this study was to identify single nucleotide polymorphisms (SNP) associated with drought to
Sci. agric. (Piracicaba, Braz.). Publicado em: 02/09/2019