Pair Work
Mostrando 25-36 de 339 artigos, teses e dissertações.
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25. Concentração de proteínas de soro do leite utilizando gel polimérico termossensível poli(N-isopropilacrilamida)
In this work, the use of a temperature-sensitive polymer gel, Poly(N-isopropylacrylamide) for the concentration of whey proteins was studied. For the proposed study, a gel matrix was synthesized, by varying the total monomer and the crosslinking agent concentration. The gels were characterized through swelling measurements and by diferential scanning calorim
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/05/2011
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26. Avaliação da imobilização do sal trissódico do ácido 1,8 -dihidróxi-2-(4-sulfofenilazol)-3,6-naftalenodisulfônico (SPADNS) em sílica gel / Evaluation of 2-(4-sulphophenylazo)-1,8-dihydroxy-3,6-napthalene disulphonic acid trisodium salt immobilization at silica gel
Solid phase extraction (SPE) is a kind of procedure for preconcentration and choice of solid phase is very important to develop analytical methods because your selectivity, affinity and retention capacity. The metals preconcentration is very used in environmental samples that have metals such as Pb2+, Cd2+, Ni2+, Al3+ at μg L-1. In that sense, the main
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/03/2011
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27. Estudo citogenético em duas espécies da família Callichthyidae (Callichthyinae, Siluriformes) da bacia do Rio de Contas/Bahia
The family Callichthyidae is included in the order Siluriformes, is widely distributed by the Neotropical region and comprises 194 species and eight genera, distributed in two subfamilies, Corydoradinae and Callichthyinae. Aiming to expand the cytogenetics information of the ichthyofauna of the eastern Atlantic basins, this work was done in Callichthys calli
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/02/2011
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28. Cytogenetic analysis of five Hypostomus species (Siluriformes, Loricariidae)
In this work, we analyzed the karyotypes of five species. Hypostomus cf. heraldoi, from the Mogi-Guaçu River, had 2n = 72 chromosomes, with a nucleolar organizer region (NOR) in one chromosomal pair. Hypostomus regani, from the Mogi-Guaçu River had 2n = 72 chromosomes with NORs in two chromosomal pairs. Hypostomus sp., from the Mogi-Guaçu River basin, had
Genetics and Molecular Biology. Publicado em: 26/08/2011
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29. Identification of distinct evolutionary units in allopatric populations of Hypostomus cf. wuchereri Günther, 1864 (Siluriformes: Loricariidae): karyotypic evidence
Few chromosomal reports are available for the endemic fish fauna from coastal basins in northeastern Brazil, and regional biodiversity remains partially or completely unknown. This is particularly true for Loricariidae, the most diverse family of armored catfishes. In the present work, allopatric populations of Hypostomus cf. wuchereri (Siluriformes: Loricar
Neotropical Ichthyology. Publicado em: 2011-06
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30. Decaimentos de mésons D e DSJ no modelo C3P0
The Fock-Tani representation is a field theory formalism appropriated for the simultaneous treatment of composite particles and their constituents. The 3P0 model is a typical decay model which considers only OZI-allowed strong decays. The model considers a quark-antiquark pair created with the vacuum quantum numbers in the presence of the initial state meson
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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31. Characterization of potato genotypes using molecular markers.
The objective of this work was to characterize 27 potato genotypes, using molecular markers. Polyacrylamide gel electrophoresis, RAPD techniques and isozymes of esterase, phosphoglucomutase and soluble proteins were analyzed in tubers, and isocitrate dehydrogenase, aspartate transaminase, phosphoglucomutase and peroxidase, in leaves. Eighteen primers were te
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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32. Dinâmica de populações em redes ecológicas : persistências, catástrofes e extinções / Population dynamics in ecological networks : persistence, catastrophes and extinctions
All living organisms interact with individuals of its own species and also with those of other species, forming a complex network of interactions that have an important role in the preservation of the biodiversity. Understanding the underlying behavior and stability of these systems is of fundamental importance to the conservation of these resources. In this
Publicado em: 2011
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33. Genetic divergence among tomato leafminer populations based on AFLP analysis.
The objective of this work was to determine the genetic differences among eight Brazilian populations of the tomato leafminer Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae), from the states of Espírito Santo (Santa Tereza), Goiás (Goianápolis), Minas Gerais (Uberlândia and Viçosa), Pernambuco (Camocim de São Félix), Rio de Janeiro (São João da B
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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34. Síntese e Estudo Termodinâmico em Adutos de Trihaletos de Antimônio e Bismuto com 2,2- Bipiridina e 1,10- Fenantrolina / SYNTHESIS AND THERMODYNAMIC STUDY IN ANTIMOMY AND BISMUTH TRICHOLRIDE ADDUCTS WITH 2,2-BIPYRIDINE AND 1,10-PHENANTROLINE
In this work were synthesized, characterized and studied experimentally and theoretically, the compounds of general formula [MX3 (L)], where M = Sb or Bi, X = Cl, Br, L = 2,2 -bipyridine (Bpy), 1,10-phenanthroline (Phen). The synthesized compounds were characterized by elemental analysis (C, H, N, Cl and Br), thermal analysis (TG / DTA) and absorption spectr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/09/2010
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35. Estudo experimental de escoamentos líquido-gás intermitentes em tubulações inclinadas / Experimental analysis of slug flow in inclined lines
This work analyses experimentally the flow properties of a gas-liquid mixture flowing in the slug regime in inclined lines. The experimental data are collected through a pair of impedance probes placed at 77D and 257D downstream of the air-water mixer in a 26mm ID pipe. During the tests air and water superficial velocities spanned, respectively, from 0,1 m/s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/02/2010
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36. The karyotype of Adenomera diptyx (Boettger 1885) (Anura, Leptodactylidae) from northeastern Argentina
In this work we analyzed the karyotype of five populations of Adenomera diptyx from Argentina after conventional staining, Ag-NOR and C-banding. All specimens presented 2n = 26 and FN = 34. The karyotype was formed by three submetacentric, one metacentric and nine telocentric pairs. Silver staining revealed that the NOR was located on a secondary constrictio
Genetics and Molecular Biology. Publicado em: 22/12/2010