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Effect of stannous chloride combined with caffeine on fecundity of Drosophila prosaltans Genet. Mol. Biol.
Itoyama,Mary Massumi; Bicudo,Hermione Elly Melara de Campos.
The present study analyzed the number of progeny of stannous chloride- and/or caffeine-treated Drosophila prosaltans. A significant decreasing effect was observed in every case when compared to the control, except for the smallest stannous chloride dose used. Combinations of both substances using two different stannous chloride doses did not differ significantly from each other but number of progeny decreased 15% with the higher concentration combination when compared with caffeine-treated flies. The present results and data in the literature indicate that the effects of continuous ingestion of stannous chloride should be studied.
Tipo: Info:eu-repo/semantics/other
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000100019
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Morphological patterns of the heteropycnotic chromatin and nucleolar material in meiosis and spermiogenesis of some Pentatomidae (Heteroptera) Genet. Mol. Biol.
Souza,Hederson Vinicius de; Castanhole,Márcia Maria Urbanin; Bicudo,Hermione Elly Melara de Campos; Costa,Luiz Antônio Alves; Itoyama,Mary Massumi.
Pentatomidae is a family of Heteroptera which includes several agriculture pests that have had different aspects of their meiosis and spermiogenesis analyzed. In the present study we analyzed the morphological patterns of the heteropycnotic chromatin and the nucleolar material of Mormidea v-luteum, Oebalus poecilus and Oebalus ypsilongriseus. The three species presented multilobate testes, with three lobes in M. v-luteum and four in the Oebalus species. A karyotype with 2n = 14 chromosomes (12A + XY) was observed in the three species. Several characteristics were common to the three species, such as the absence of a testicular harlequin lobe (a lobe which produces different types of spermatozoa, previously considered a general characteristic of this...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nucleolus semi-persistence; Late chromosome migration; Multilobed testes.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000400014
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Effect of phenobarbital on inducing insecticide tolerance and esterase changes in Aedes aegypti (Diptera: Culicidae) Genet. Mol. Biol.
Sousa-Polezzi,Rita de Cássia; Bicudo,Hermione Elly Melara de Campos.
The effect of phenobarbital (PB) on the induction of tolerance to the organophosphorous insecticide temephos (TE) was investigated in Aedes aegypti L4 larvae submitted to two different PB-treatments:(1) continuous treatment from the egg to the larval L4 stage and (2) discontinuous treatment in which L4 larvae were exposed for 30 h. Mosquitoes from two Brazilian cities were studied: São José do Rio Preto (SJ) in São Paulo State and Goiânia (GO) in Goiás State. According to criterions established by World Health Organization (WHO) mosquitoes from SJ are organophosphate-susceptible while mosquitoes from GO are organophosphate-resistant. For both SJ and GO larvae the two different PB-treatments resulted in significantly increased tolerance (measured by reduced...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aedes aegypti; Insecticide resistance; Phenobarbital; Tolerance; Pyperonyl butoxide; Esterases.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200024
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On the use of open or closed traps in the capture of drosophilids Biota Neotropica
Penariol,Leiza; Bicudo,Hermione Elly Melara de Campos; Madi-Ravazzi,Lilian.
The use of open or closed traps in order to standardize the drosophilid collection is still a matter of discussion among researchers. In this paper, comparative data of drosophilid collections, using open and closed traps are presented. The collections were made monthly, during one year, in one fragment of a semidecidual forest located in the São Paulo State, Brazil. The efficiency of the traps was evaluated by the use of community descriptors: population abundance and richness and diversity of species. Closed traps were more efficient than the open ones in relation to the population abundance and the species richness, indicating their adequacy for standardization of drosophilid collection in studies of biodiversity and seasonality.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Capture traps; Drosophilid; Biodiversity; Seasonality.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032008000200004
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Effects of caffeine on mitotic index in Drosophila prosaltans (Diptera) Braz. J. Genet.
Itoyama,Mary Massumi; Bicudo,Hermione Elly Melara de Campos; Cordeiro,José Antônio.
The effect of two concentrations of caffeine (1500 <FONT FACE="Symbol">m</FONT>g/ml and 2500 <FONT FACE="Symbol">m</FONT>g/ml) on mitotic indices of Drosophila prosaltans was analyzed in larval brain cells. Although the differences detected between treated and control cells were not significant, the percentages obtained suggest a possible effect of caffeine in slowing the process of cell division
Tipo: Info:eu-repo/semantics/other
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551997000400016
Registros recuperados: 5
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