Natural Selection
Mostrando 1-12 de 1234 artigos, teses e dissertações.
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1. Normocalcemic primary hyperparathyroidism
ABSTRACT Normocalcemic primary hyperparathyroidism (PHPT) is a newer phenotype of PHPT defined by elevated PTH concentrations in the setting of normal serum calcium levels. It is increasingly being diagnosed in the setting of evaluation for nephrolithiasis or metabolic bone diseases. It is important to demonstrate that PTH values remain consistently elevated
Archives of Endocrinology and Metabolism. Publicado em: 2022
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2. Ultrafine quartz flocculation: Part I. System characterization and variables selection
Abstract A characterization study was performed to verify the more relevant physicochemical properties for quartz flocculation with polyacrylamide, as well as to define which variables should be further investigated regarding this flocculation system. Polyacrylamide was evaluated through molecular weight, radius of gyration, and infrared spectrometry. A natu
REM - International Engineering Journal. Publicado em: 2022
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3. AMPLIFICATION AND SELECTION PROFILE OF ISSR MARKERS FOR GENETIC STUDIES IN Calotropis procera
RESUMO Algodão de seda é uma espécie vegetal adaptada a vários ecossistemas e tem se destacado pela importância econômica e ecológica. Nós avaliamos o perfil de amplificação de 23 iniciadores ISSR e selecionamos loci polimórficos para estudos genéticos de uma população natural de Calotropis procera por meio da coleta e extração de DNA genômi
Revista Caatinga. Publicado em: 2022
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4. HOW COMPETITION INDICES BEHAVE AT DIFFERENT NEIGHBORHOOD COVERAGES AND MODIFICATIONS IN A NATURAL ARAUCARIA FOREST IN SOUTHERN BRAZIL
ABSTRACT Tree-level growth models are being more used in heterogeneous forests, for they can take underlying processes, such as competition, into account. Although it is common in the forest literature to test several indices in order to define the most suitable for each study, the evaluation of plot sizes or competition radii is poorly addressed in competit
CERNE. Publicado em: 2020-06
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5. Correlations of rock mass classifications applied to ferruginous caves
Abstract For the Brazilian iron ore mines, the presence of caves presents a challenge, since most of them are located within the ore deposit. The National Environment Commission (CONAMA 347 Resolution/2004) establishes that the speleological heritage, as well as its area of influence, cannot sustain irreversible environmental impacts. The physical integrity
REM, Int. Eng. J.. Publicado em: 2020-06
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6. And people already ask with malice: Where is ...
Abstract For the Brazilian iron ore mines, the presence of caves presents a challenge, since most of them are located within the ore deposit. The National Environment Commission (CONAMA 347 Resolution/2004) establishes that the speleological heritage, as well as its area of influence, cannot sustain irreversible environmental impacts. The physical integrity
REM, Int. Eng. J.. Publicado em: 2020-06
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7. Molecular sexing and intersexual differences in the morphometry of the Hangnest Tody-Tyrant Hemitriccus nidipendulus (Passeriformes: Rhynchocyclidae)
ABSTRACT Variation in the morphometry of individuals in a population may result from natural or sexual selection. In the present study we investigated morphometric differences between males and females of a bird species endemic to the Brazilian Atlantic Forest, the Hangnest Tody-Tyrant, Hemitriccus nidipendulus (Wied, 1831), with no apparent sexual dimorphis
Zoologia (Curitiba). Publicado em: 25/11/2019
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8. Natural convection drying kinetics of ‘Prata’ and ‘D’água’ banana cultivars (Musa ssp) by nonlinear regression models
Resumo A bananeira está entre as frutíferas mais plantadas em países tropicais e pertence ao grupo de frutos mais consumidos do mundo; entretanto, necessitam de técnicas de conservação adequadas. Objetivou-se descrever a cinética de secagem de bananas Prata e D’água nas temperaturas de 40 e 70°C, comparando os modelos de regressão Henderson, EST
Rev. Bras. Frutic.. Publicado em: 14/11/2019
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9. Data mining as a hatchery process evaluation tool
ABSTRACT The hatchery is one of the most important segments of the poultry chain, and generates an abundance of data, which, when analyzed, allow for identifying critical points of the process . The aim of this study was to evaluate the applicability of the data mining technique to databases of egg incubation of broiler breeders and laying hen breeders. The
Sci. agric. (Piracicaba, Braz.). Publicado em: 04/11/2019
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10. Pure line selection in a heterogeneous soybean cultivar
Abstract Although cultivars of autogamous plants are homogeneous genotypes, they may show natural variability due to mechanical mixing, natural hybridization, and mutation. The aim of the present study was to estimate genetic and phenotypic parameters and to identify and select superior genotypes that associate good performance in traits of interest from a h
Crop Breed. Appl. Biotechnol.. Publicado em: 31/10/2019
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11. The experience of community urban gardens: Social organization and food security
RESUMO Objetivo Caracterizar as hortas urbanas comunitárias de Salvador-Bahia, quanto à organização social, ao trabalho, à oferta e o acesso aos alimentos, em alinhamento ao conceito de Segurança Alimentar. Métodos Realizou-se estudo transversal, exploratório, envolvendo levantamento de informações, identificação e seleção das hortas comunit�
Rev. Nutr.. Publicado em: 12/09/2019
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12. O Holoceno inferior e a antropogênese amazônica na longa história indígena da Amazônia oriental (Carajás, Pará, Brasil)
Resumo Segundo estudos recentes, a influência indígena sobre a floresta amazônica foi intensa, diversificada e teve início com a chegada do Homem na região, nos primórdios do Holoceno inferior. Nesta história de longa duração, no entanto, a seleção cultural de espécies úteis promovidas não foi uma via de mão única. Ela impactou a seleção na
Bol. Mus. Para. Emílio Goeldi. Ciênc. hum.. Publicado em: 26/08/2019