Nitrogen Stable Isotope
Mostrando 1-12 de 33 artigos, teses e dissertações.
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1. Changes in trophic characteristics of two fish species of Astyanax (Teleostei: Characidae) in response to aquatic pollution
ABSTRACT The trophic plasticity of most fish species of Astyanax Baird & Girard, 1854 in response to environmental changes and resource availability is high. This work evaluates the differences in the trophic characteristics of two congeneric species, Astyanax taeniatus (Jenyns, 1842) and Astyanax lacustris (Lütken, 1875), in Rio das Velhas Basin, which is
Zoologia (Curitiba). Publicado em: 22/07/2019
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2. Traceability of animal protein byproducts in ruminants by multivariate analysis of isotope ratio mass spectrometry to prevent transmission of prion diseases
Abstract Background: Ruminant feed containing animal byproduct proteins (ABPs) is prohibited in many countries due to its risk of transmitting prion diseases (PD). In most cases the entire herd is sacrificed, which causes great harm to the producer countries by preventing their exportation of ruminant derived-products. Methods: We used stable isotope ratio
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 13/05/2019
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3. Standardization of A Sample-Processing Methodology for Stable Isotope Studies in Poultry
ABSTRACT The objective of this study was to determine if lipid extraction processes alter the isotopic value of δ13C and δ15N of tissues (pectoral muscle, thigh and liver) and eggs and if the use of anticoagulants interferes with blood and plasma δ13C and δ15N isotopic values. Samples were acquired from the same flock of birds. The 32 egg samples were ra
Braz. J. Poult. Sci.. Publicado em: 18/04/2019
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4. Background and the use of isoscapes in the Brazilian context: essential tool for isotope data interpretation and natural resource management
Resumo Padrões de distribuição espacial de isótopos estáveis podem ser apresentados em mapas chamados de isoscapes e têm sido amplamente utilizados para rastrear processos biogeoquímicos em sistemas naturais e antrópicos. Isoscapes têm o potencial de melhorar a disseminação e interpretação dos padrões espaciais de isótopos estáveis, aumentar
Rev. Ambient. Água. Publicado em: 25/03/2019
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5. Trophic ecology of citrus pests based on stable isotope analysis
ABSTRACT: Macrodactylus pumilio Burm. (Coleoptera: Scarabeidae) and Naupactus cervinus (Boh.) (Coleoptera: Curculionidae) are considered primary pests in citrus crops in Brazil, causing damage to plants and decreasing productivity. However, few studies investigate the ecology of these insects. In this context, the use of stable isotopes analysis (SIA) emerge
Sci. agric. (Piracicaba, Braz.). Publicado em: 2018-12
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6. Effects of sex and altitude on nutrient, and carbon and nitrogen stable isotope composition of the endangered shrub Baccharis concinna G.M. Barroso (Asteraceae)
ABSTRACT Previous ecological studies of dioecious plant species have found that female plants preferentially occur at lower altitudes where there are typically better nutritional conditions, while male plants often occur in less favorable sites. We compared the ecophysiological performance of male and female plants in three populations of the dioecious Bacch
Acta Bot. Bras.. Publicado em: 2017-06
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7. The use of carbon and nitrogen stable isotopes for the detection of poultry offal meal in meat-type quail feeds
The objective of the present study was to trace the inclusion of poultry offal meal (POM) in the diet of meat-type quails reared for a long period using the technique of stable isotopes. A number of 320 quails were randomly distributed into eight treatments: vegetable diet (T1), and a diet containing 8% POM were fed until the end of the experimental period (
Rev. Bras. Cienc. Avic.. Publicado em: 2013-03
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8. DEPLOYMENT OF METHOD FOR ANALYSIS OF STABLE CARBON ISOTOPES (N-ALKANES C1-C5) IN GAS SAMPLES AT LOW CONCENTRATIONS / IMPLANTAÇÃO DE MÉTODO PARA ANÁLISE DE ISÓTOPOS ESTÁVEIS DE CARBONO (N-ALCANOS C1-C5) EM GASES A BAIXAS CONCENTRAÇÕES
The concentration and isotopic composition of n-alkanes C1-C5 has revealed as a powerful tool for interpretation of interesting processes in the oil exploration industry, studies of global climate change, oil biodegradation and carbon cycle elucidation. In this context, studies about methane analysis have been distinguished and multiplied due to the importan
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/10/2011
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9. Eficiência da aplicação de ureia em fertirrigação de cafeeiros irrigados por pivô central, utilizando o traçador 15N / Efficiency of urea applied by pivot central fertigation to coffee plants, using 15N tracer
A cultura do cafeeiro é muito importante para a economia agrícola brasileira e em anos recentes tem avançado para o cerrado do oeste da Bahia. Esta região apresenta condições de solo e clima diferentes daquelas onde a cafeicultura já está estabelecida e, portanto, necessita de reavaliações no seu manejo, principalmente quanto à adubação nitrogen
Publicado em: 2011
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10. Estudo da fixação biológica do nitrogênio em leguminosas (família Fabaceae) arbóreas tropicais através do enriquecimento isotópico do 15N / Estimates of biological nitrogen fixation by tropical legume trees (Fabaceae) using 15N labeled fertilizer
A família Fabaceae abundante nos trópicos, desperta grande interesse para o uso em recuperação de áreas degradas, já que em sua maioria, são lenhosas e perenes, se adaptam aos mais diversos ecossistemas brasileiros e são capazes de fazer associações simbiônticas com bactérias pertencentes ao gênero Rhizobium, que fixam nitrogênio atmosférico f
Publicado em: 2010
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11. Isotopical analysis of free range and wild capybara (Hydrochoerus hydrochaeris) tissues / Análise isotópica de diferentes tecidos de capivara (Hydrochoerus hydrochaeris) de criadouro e vida livre
Based on isotopic methodology, this study developed a dietary analysis of free range and wild capybara, using different tissues (muscle, blood, nail and hair), in order to provide information for the species management and verify possible alternative tissues that reflect the values of the consumption source. It was analyzed carbon (C) and nitrogen (N) stable
Publicado em: 2009
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12. The traceability of animal meals in layer diets as detected by stable carbon and nitrogen isotope analyses of eggs
The aim of this study was to trace the inclusion of animal meals in layer diets by analyzing eggs and their fractions (yolk and albumen) using the technique of carbon and nitrogen isotopes. Two-hundred and eighty-eight (288) 73-week-old Shaver White layers, never fed animal ingredients, were randomly distributed in six treatments with six replicates each. Th
Revista Brasileira de Ciência Avícola. Publicado em: 2008-09