Large Vertebrates
Mostrando 13-24 de 143 artigos, teses e dissertações.
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13. Growth hormone-insuline-like growth factor-I system in pejerrey Odontesthes bonariensis (Atheriniformes)
Using biotechnology to increase the growth rates of fish is likely to reduce production costs per unit of food. Among vertebrates, fish appear to occupy a unique position, when growth patterns are considered. With few exceptions, fish species tend to grow indeterminately, implying that size is never fixed. Both hyperplasia and hypertrophy contribute to post-
Revista Brasileira de Zootecnia. Publicado em: 2008-07
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14. Biota-Rio: Um banco de dados para a biodiversidade do Estado do Rio de Janeiro / BIOTA-RIO: A Database of Biodiversity in the State of Rio de Janeiro
The use of information technology in biodiversity related databases is increasing due to the open access to a large sum of data. Access to this information may be regarded as crucial to different areas of knowledge. The present work aims at the development of a open access computational system on biodiversity of the State of Rio de Janeiro. The Biota-R
Publicado em: 2008
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15. Os vertebrados da Bacia da ParaÃba: CretÃceo Superior-Paleoceno, Nordeste do Brasil
The aim pourpose of this research is the study of the vertebrate fauna of ParaÃba Basin, using taxonomic, paleoecologic and paleoenvironment aspects with emphasis in the tooth analysis of reptiles and bone fishes (Enchodus), for the diagnostic characteristics that allow the taxonomic classification. It was indentified and revised taxonomic of 36 taxon, from
Publicado em: 2007
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16. Structural analyses of rab family GTPases and mechanism of Mafb regulation by the protein TIPRL / Analises estruturais de GTPases da familia RAB e mecanismo de regulção de MAFB pela proteina TIPRL
GTPases of the Rab family are responsible for the intracellular transport of vesicles. Each family member acts on a specific transport pathway and their function is regulated by GTP binding and hydrolysis, cycling between inactive (GDP-bound) and active (GTP-bound) forms. In this work, we describe the crystal structure of inactive and active forms of the GTP
Publicado em: 2007
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17. Caracterização da expressão e função de receptores recombinantes do hormônio folículo-estimulante. / Characterization of expression and function of recombinant follicle-stimulating receptors.
The follicle stimulating hormone receptor (FSHR) is a member of a family of Gprotein-coupled receptors that has a large aminoterminal domain, rich in leucine repeats. The FSHR, together with the luteinizing hormone receptor, controls gonadal function in vertebrates. Mutations in the FSHR can alter its binding and signaling properties, and drastically affect
Publicado em: 2006
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18. Variabilidade genetica e estrutura de populações de Cochliomyia hominivorax (Diptera: Calliphoridae) : uma nova perspectiva atraves de marcadores microssatelites / Genetic diversity and population structure in the new world screw-worm, Cochliomyia hominivorax (Diptera: Calliphoridae), as revealed by microsatellite markers
The cultural and economic importance of animal production in South America dates back to the colonial era. This continent has one of the largest percentages of the world s total cattle population and countries like Brazil, Argentina and Uruguay play a major role as exporters of a variety of livestock products. Diseases affecting livestock can have a signific
Publicado em: 2006
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19. Estruturação genética em populações do tangará-dançarino Chiroxiphia caudata (Aves, Pipridae) no corredor costeiro da Mata Atlântica (SP) e sua importância para a conservação.
Neotropical passerine birds that inhabit forests understory are thought to be highly sedentary, which may result in greater genetic differentiation among populations than in temperate species. The species of the genus Chiroxiphia (Pipridae) perform highly specialized courtship displays in which males aggregate at traditional arenas, or ``leks, performing a p
Publicado em: 2005
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20. Manejo do cálcio intracelular e influência da temperatura sobre a contratilidade cardíaca de Synbranchus marmoratus.
The present study anlyzed the in vivo and in vitro responses of the myocardium obtained from Synbranchus marmoratus acclimated at 25 C and tested at 15, 25 and 35 C. The in vivo heart rate (fH bpm) was measured during acute transitions in temperature and subsequent return to 25 C. ECG recordings (lead DI of the electrocardiography) were obtained of electrode
Publicado em: 2004
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21. Historia natural de peixes do Pantanal : com destaque em habitos alimentares e defesa contra predadores
This study deals with the natural history of fish of the Pantanal, espcially the feeding habits and means of defence against predators that these animals possess. The field studies were carried out in lagoons, vazantes (drainage channels) and corixos (lake outlets) that are found alongside the Transpantaneira Highway, in the Poconé region of the Pantanal, M
Publicado em: 2003
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22. Estabelecimento de plantulas e jovens de especies arboreas em fragmentos florestais de diferentes tamanhos
Little is known about the effects of fragmentation in seedling community, which is the fIrst to suffer with the effects of fragmentation. The study of the patter of the regeneration is very important because it will determine the future composition of an area. In this context, this study had two aims: analyze the allometric relation between the largest horiz
Publicado em: 2002
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23. New Evidence for Genome-Wide Duplications at the Origin of Vertebrates Using an Amphioxus Gene Set and Completed Animal Genomes
The 2R hypothesis predicting two genome duplications at the origin of vertebrates is highly controversial. Studies published so far include limited sequence data from organisms close to the hypothesized genome duplications. Through the comparison of a gene catalog from amphioxus, the closest living invertebrate relative of vertebrates, to 3453 single-cop
Cold Spring Harbor Laboratory Press.
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24. The complete nucleotide sequence of mouse 28S rRNA gene. Implications for the process of size increase of the large subunit rRNA in higher eukaryotes.
We have determined the complete nucleotide sequence (4712 nucleotides) of the mouse 28S rRNA gene. Comparison with all other homologs indicates that the potential for major variations in size during the evolution has been restricted to a unique set of a few sites within a largely conserved secondary structure core. The D (divergent) domains, responsible for