D Rerio
Mostrando 13-24 de 29 artigos, teses e dissertações.
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13. Analyses of the sediment toxicity of Monjolinho River, São Carlos, São Paulo State, Brazil, using survey, growth and gill morphology of two fish species (Danio rerio and Poecilia reticulata)
Este trabalho teve como objetivo avaliar a toxicidade dos sedimentos do rio Monjolinho (São Carlos - São Paulo/Brasil), por meio de bioensaios de toxicidade crônicos parciais com juvenis de D. rerio e P. reticulata. Foram realizadas análises histológicas das brânquias dos organismos para detectar possíveis efeitos deletérios que antecedam a mortalida
Brazilian Archives of Biology and Technology. Publicado em: 2008-02
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14. Modulação dos genes de relógio Per1, Cry1b, Clock e da melanopsina por endotelina-1 em células embrionárias de Danio rerio / Modulation of clock genes Per1, Cry1b, Clock and of melanopsin by endothelin-1 in Danio rerio embryonic cells
Biological clocks are endogenous timekeepers that are present both in eukaryotic as in prokaryotic organisms. Different clocks have different periods, and those that have about 24h of oscillation are called circadian clocks. In mammals, the first identified circadian clock is located in the suprachiasmatic nucleus, in the hipothalamus. It is now well known t
Publicado em: 2007
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15. Temporal gene expression of melanopsin (Opn4), Clock, Cry and Per and regulation by melatonin in Danio rerio cells / Expressão gênica temporal de Melanopsina (Opn4), Clock, Cry e Per e sua regulação por melatonina em células de Danio rerio
The presence of melanopsin mRNA in ZEM-2S embryonic cells was determined through PCR, followed by sequencing. PCR experiments for melatonin receptors with ZEM-2S cell cDNA suggested the presence of the MT2 subtype. Bands corresponding to the expected weight for MT1 or Mel 1C were not identified. The identity of the MT2 receptor in ZEM-2S was confirmed throug
Publicado em: 2007
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16. Computational methods for analysis and characterization of the relationship between anatomy and gene expression in biological systems / Métodos computacionais para a caracterização e análise da relação entre anatomia e expressão gênica em sistemas biológicos.
The areas of cell and molecular biology have accumulated a large number of experimental facts, such as genomic sequences and protein structure. However, this is not sufficient to the understanding of biological systems, even to explain the intricate dynamical interactions between gene expression and anatomical development. In order to characterize and analyz
Publicado em: 2007
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17. Estudos limnológicos e ecotoxicológicos (laboratoriais e in situ), com ênfase na avaliação da toxicidade de metais e de pesticidas organoclorados em peixes (Danio rerio e Poecilia reticulata - sub-bacia do rio Monjolinho (São Carlos SP). / Limnological and ecotoxicological studies (in laboratory and in situ), emphasizing the evaluation of heavy metals and organochloride pesticides in fishes (Danio rerio and Poecilia reticulata) Monjolinho River sub-basin (São Carlos, SP).
In order to evaluate the physical, chemical, biological and ecotoxicological parameters of Monjolinho River system (in laboratory and in situ), water and sediment samples (from the river and from eight of its tributaries) we obtained in july/03, October/03, January/04 and April/04. Juveniles and adult individuals of Danio rerio and Poecilia reticulata were u
Publicado em: 2006
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18. Avaliação da toxicidade de fluidos de usinagem através da ecotoxicologia aquática / Evaluation of the toxicity of fluids employed in the metallic tool industrial machining using aquatic ecotoxicology
Ecotoxicological analyses have being used to monitor environmental samples, industrial effluents and complex substances. With the objective to analyze the toxicity of cutting fluids used in the machinery industry, acute toxicity test with species of three different throphic levels: Vibrio fischeri, Daphnia similis, Daphnia laevis e Danio rerio, were performi
Publicado em: 2006
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19. Acute toxicity, behavior and anatomopathological analysis in different species of fish exposed to the commercial formulation containing deltamethrin / Toxicidade aguda, comportamento e análises anatomopatológicas em diferentes espécies de peixes expostos à formulação comercial contendo deltametrina
A toxicidade da formulação comercial contendo o praguicida piretróide deltametrina foi testada nas espécies de peixe Danio rerio, Hyphessobrycon bifasciatus, Geophagus brasiliensis e Oreochromis niloticus por meio de testes de toxicidade aguda, avaliação de alterações comportamentais e análises anatomopatológicas do fígado e das brânquias. A esp�
Publicado em: 2005
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20. Sediment toxicity of the Monjolinho river basins (São Carlos - SP): emphasis in the substances copper, aldrin and heptachlor / Toxicidade dos sedimentos da Bacia Hidrográfica do Rio Monjolinho ( São Carlos - SP): ênfase nas substâncias cobre, aldrin e heptacloro
This work aimed evaluates the Monjolinho river quality through physical, chemical, biological and ecotoxicological analysis. Samples of water and sediment were collected in July/03; October/03; January/04 and April/04 in fourteen locations. Moreover studies about survival, growth and gills morphology were performed in organisms exposed to copper, aldrin and
Publicado em: 2005
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21. Genetic heterogeneity in isogenic homozygous clonal zebrafish.
The C32 isogenic homozygous diploid (IHD) strain of the zebrafish (Danio rerio) was found to be polyallelic at a malate dehydrogenase locus (sMdh-A). A variant allele is thought to have arisen via mutation within the past 10 bisexual generations that have maintained the strain since its last gynogenetic cloning event; this unique allele now predominates at t
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22. Spectacular morphological novelty in a miniature cyprinid fish, Danionella dracula n. sp.
Danionella dracula is a new species of sexually dimorphic, miniature and highly developmentally truncated cyprinid fish. Compared with its close relative, the zebrafish Danio rerio, it lacks 44 bones or parts thereof and represents one of the most developmentally truncated vertebrates. Absence of the majority of bones appears to be due to developmental trunc
The Royal Society.
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23. Transcription-dependent induction of G1 phase during the zebra fish midblastula transition.
The early development of the zebra fish (Danio rerio) embryo is characterized by a series of rapid and synchronous cell cycles with no detectable transcription. This period is followed by the midblastula transition (MBT), during which the cell cycle gradually lengthens, cell synchrony is lost, and zygotic transcription is initially detected. In this work, we
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24. New retinoid X receptor subtypes in zebra fish (Danio rerio) differentially modulate transcription and do not bind 9-cis retinoic acid.
Retinoid X receptors (RXRs), along with retinoic acid (RA) receptors (RARs), mediate the effects of RA on gene expression. Three subtypes of RXRs (alpha, beta, and gamma) which bind to and are activated by the 9-cis stereoisomer of RA have been characterized. They activate gene transcription by binding to specific sites on DNA as homodimers or as heterodimer