Consulta: creatorFacets:"Kerr,Warwick E."
Registros recuperados: 14
Data/hora: 12/06/2024 13:22:25

Modulatory effects of Tabebuia impetiginosa (Lamiales, Bignoniaceae) on doxorubicin-induced somatic mutation and recombination in Drosophila melanogaster
Provedor de dados: 74
Autores: Sousa,Neila C. de; Rezende,Alexandre A.A. de; Silva,Regildo M.G. da; Guterres,Zaira R.; Graf,Ulrich; Kerr,Warwick E.; Spanó,Mário A.
The wing Somatic Mutation and Recombination Test (SMART) in D. melanogaster was used to study genotoxicity of the medicinal plant Tabebuia impetiginosa. Lapachol (naphthoquinone) and β-lapachone (quinone) are the two main chemical constituents of T. impetiginosa. These compounds have several biological properties. They induce apoptosis by generating oxygen-reactive species, thereby inhibiting topoisomerases (I and II) or inducing other enzymes dependent on NAD(P)H:quinone oxidoreductase 1, thus affecting cell cycle checkpoints. The SMART was used in the standard (ST) version, which has normal levels of cytochrome P450 (CYP) enzymes, to check the direct action of this compound, and in the high bioactivation (HB) version, which has a high constitutive level...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genotoxicity; Synergistic effect; Somatic mutation and recombination test - SMART; Toxicity; Wing spot test.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200027

Comparative anatomy of the male reproductive internal organs of 51 species of bees
Provedor de dados: 82
Autores: Ferreira,Amilton; Abdalla,Fábio C.; Kerr,Warwick E.; Cruz-Landim,Carminda da.
The anatomy of the internal organs of the male reproductive apparatus (MRA) of adults and pupae was compared among 51 species of bees, including representatives of six families. Four different types of MRA were found. The type I is present in males of the less derived families (Colletidae, Andrenidae, and Halictidae) and is characterized by three seminiferous tubules per testis, which are almost completely enveloped by the scrotal membrane. The type II is an intermediary between types III and I and is present in Melittidae and Megachilidae, as well as in some Apidae studied, being characterized by post-vesicular deferent ducts outside the scrotal membrane and by three or four seminiferous tubules per testis, except for Apis mellifera L., which has a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Accessory gland; Genitalia; Morphology.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000500005

Mancha de Septoria da alface: isolamento, inoculação e avaliação de cultivares em condições de campo e casa de vegetação
Provedor de dados: 102
Autores: Sousa,Cristina S.; Kerr,Warwick E.; Santos,Marlos R.; Arruda,Alcione S.; Spini,Vanessa B. M. G.; Juliatti,Fernando C.; Takatsu,Armando.
Este trabalho teve como objetivo estabelecer metodologias adequadas para o isolamento e inoculação de Septoria lactucae e avaliação de nove cultivares de alface (Lactuca sativa), Vitória-de-Santo-Antão, Uberlândia 10.000, Maioba, Elba, Aurélia, Black Seeded Simpson, Grand Rapids, Salad Bowl-Mimosa e Babá de Verão, quanto aos níveis de resistência à septoriose, em condições de casa de vegetação e campo. Os melhores resultados obtidos foram: a) para isolamento: transferência dos cirros de conídios diretamente para o meio de BDA com os antibióticos estreptomicina, cloranfenicol, ampicilina e rifampicilina; b) para inoculação: aspersão das plantas no estádio de seis a oito folhas com a suspensão de inóculo na concentração de 1 x 10(4)conídios/ml, e manutenção...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Septoriose; Septoria lactucae; Lactuca sativa.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582003000500016

Número de alelos XO em uma população de Melipona quadrifasciata anthidioides Lepeletier (Hymenoptera, Apidae, Meliponinae)
Provedor de dados: 104
Autores: Aidar,Davi S.; Kerr,Warwick E.
The number of xo alleles of a population of stingless bees can be estimated by observing the male proportion of the first brood comb produced by a new queen (about 40 Fl bees) and the total number of colonies. A proportion of 50% diploid males indicates insemination of the queen by a single male with some xo sex allele: 25% diploid male would indicate insemination by two males (one with some xo as the queen and another with different one). Diploidy was confirmed by cytology of the testis. The original population (78 colonies) of Ribeirão Preto, State S. Paulo, Brazil, had 8 xo sex alleles. From this population, 10 colonies were orphaned and taken to the Serra do Mar (Sea Mountains) at Espirito Santo State (1200 km far) in order that the virgin queen of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Melipona quadrifasciata anthidioides; Colonies; Population and alleles.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000400018

Biologia de anofelinos amazônicos. 1 - Ciclo biológico, postura e estádios larvais de Anopheles darlingi Root 1926 (Diptera: Culicidae) da Rodovia Manaus - Boa Vista
Provedor de dados: 36
Autores: Santos,Joselita M. Mendes dos; Contel,Eucleia Primo B.; Kerr,Warwick E.
Resumo Os estudos de laboratório sobre a biologia de A. darling demonstraram que o ciclo biológico de ovo a adulto se faz, em média, em 15,6 dias e com uma taxa de sobrevivência de 57% quando criados de 25 a 28°C. O número médio de ovos por postura foi de 110±50,61 e eclodiram em média 83,31±48,21, com um tempo médio para eclosão de dois dias. O tempo de desenvolvimento de cada estádio imaturo apresentou variações. O 2.° e 3.° estádios larvais apresentaram um tempo de desenvolvimento menor do que o 1.° e 4° estádios.
Ano: 1981
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671981000800789

Plantas nectaríferas utilizadas por duas espécies de Melipona da Amazônia
Provedor de dados: 36
Autores: Absy,Maria Lúcia; Bezerra,Eronildo Braga; Kerr,Warwick E.
Resumo Analisa-se o néctar de 302 abelhas de Melipona seminigra merrillae Cock. e 302 de abelhas de Melipona rufiventris paraensis Ducke, durante o período de maio de 1977 a abril de 1978, em Manaus. Do total de amostras estudadas de M. seminigra e M. rufiventris, 16 (5,3%) e 11 (3,6%) respectivamente, não continham pólen. Das 286 restantes (94,7%) de M. seminigra, 80 (28%) apresentavam pólen de uma só espécie, 88 (30,8%) de duas espécies e 118 (41,2%) de três ou mais. De 291 (96,4%) restantes de M. rufiventris, 33 (11,3%) apresentavam pólen de uma só espécie, 54 (18,6%) de duas espécies e 204 (70,1%) de três ou mais. Os grãos de pólen encontrados nas amostras de néctar representam ao todo 60 tipos morfológicos, distribuídos em 29 famílias, pelo menos 42...
Ano: 1980
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671980000200271

Aripuanã - um laboratório de colonização racional
Provedor de dados: 36
Autores: Kerr,Warwick E.
Tipo: Info:eu-repo/semantics/other
Ano: 1979
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671979000100003

Biology of amazonian mosquitoes. III. Esterase isozymes in Anopheles darlingi.
Provedor de dados: 36
Autores: Santos,Joselita M.M. dos; Contel,Eucleia P.B.; Kerr,Warwick E.
Six esterase isozymes were studied during the development of Anopheles darlingi by using polyacrylamide gel electrophoresis and two different substrates, a-naphthylcelate and a-naphthylpropionate. Esterases 5 and 6'were detected in all developmental stages esterases 1 and 2 were more intensively stained if larvae, while esterases 3 and 4 were better visualized in pupae and adults. Strong differences in intensity of some of the isozymes were observed during the pupal stage.Four out of the six isozymes showed variation in the electrophoretic mobility. Esterase-2 was choosed for genetic studies, because was the best stained isozyme in the gels. Two codominant alleles {Est2*S and Est2*F) code for this polymorphic system, with the Est*S frequency equal to...
Tipo: Info:eu-repo/semantics/article
Ano: 1985
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671985000100167

Cupá, ou cipó-babão, alimento de alguns índios amazônicos
Provedor de dados: 36
Autores: Kerr,Warwick E.; Posey,Darrell A.; Wolter Filho,Wilson.
Summary INPA is developing studies concerning the agricultural plants of the Brazilian Indians. a collection was made among the Kayapó Indians of the Cupa vine (Cissus gongylodes Burch. ex Baker, Vitaceae). This note provides botanical information on this plant, its uses by the seringueiros (rubber collectors) and by the indians, and agronomical and chemical data.
Ano: 1978
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671978000400702

Differentially displayed expressed sequence tags in Melipona scutellaris (Hymenoptera, Apidae, Meliponini) development
Provedor de dados: 42
Autores: Santana,Flávia A.; Nunes,Francis M.F.; Vieira,Carlos U.; Machado,Maria Alice M.S.; Kerr,Warwick E.; Silva Jr,Wilson A.; Bonetti,Ana Maria.
We have compared gene expression, using the Differential Display Reverse Transcriptase - Polymerase Chain Reaction (DDRT-PCR) technique, by means of mRNA profile in Melipona scutellaris during ontogenetic postembryonic development, in adult worker, and in both Natural and Juvenile Hormone III-induced adult queen. Six, out of the nine ESTs described here, presented differentially expressed in the phases L1 or L2, or even in both of them, suggesting that key mechanisms to the development of Melipona scutellaris are regulated in these stages. The combination HT11G-AP05 revealed in L1 and L2 a product which matches to thioredoxin reductase protein domain in the Clostridium sporogenes, an important protein during cellular oxidoreduction processes. This study...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Melipona scutellaris; Gene expression; DDRT-PCR.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000100008

Characterization of DNA polymorphisms in Caryocar brasiliense (Camb.) in populations with and without thorn at the endocarp by RAPD markers
Provedor de dados: 42
Autores: Londe,Luciana N.; Ueira-Vieira,Carlos; Kerr,Warwick E.; Bonetti,Ana Maria.
Caryocar brasiliense (pequi), is one of the main species at the biome of the Brazilian savannah due to its use in culinary, popular medicine, industry in general, and iron and steel industry. At São José do Xingu (MT), a tree of C. brasiliense without thorn at the endocarp was found, which enables the improvement of C. brasiliense not only for consumption but also to the high appreciation it already has. To detect the existing differences between the pequi with and without the thorn at the endocarp, RADP markers were used. The generated polymorphisms were cloned and sequenced in order to identify the sequences that are responsible for the fenotypical alteration. It was observed that the pequi without thorn is genetically isolated from the other populations...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caryocar brasiliense; Pequi; Thorn; RAPD.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000300024

Bases para o estudo da genética de populações dos Hymenoptera em geral e dos Apinae sociais em particular
Provedor de dados: 43
Autores: Kerr,Warwick E.
This paper deals with problems on population genetics in Hymenoptera and particularly in social Apidae. 1) The studies on populations of Hymenoptera were made according to the two basic types of reproduction: endogamy and panmixia. The populations of social Apinae have a mixed method of reproduction with higher percentage of panmixia and a lower of endogamy. This is shown by the following a) males can enter any hive in swarming time; b) males of Meliponini are expelled from hives which does not need them, and thus, are forced to look for some other place; c) Meliponini males were seen powdering themselves with pollen, thus becoming more acceptable in any other hive. The panmixia is not complete owing to the fact that the density of the breeding population...
Tipo: Info:eu-repo/semantics/article
Ano: 1951
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761951000100014

Formação das castas no gênero Melípona (Illiger, 1806)
Provedor de dados: 43
Autores: Kerr,Warwick E.
The present work is destinated to prove that the castes : workers and queens, in Melipona bees are due to genetic factors and not to differences in food. 2) Material used: Hives of Melipona quadri-fasciata anthidioides (Lep. 1836), M. schenki schenki (Gribodo, 1893), M. fasciata rufiventris (Lep. 1836), M. quadri-fasciata vicina (Lep. 1836), M. marginata marginata (Lep. 1836), Apis mellifera (L. 1758). 3) It should be pointed out that in Melipona bees there are no royal cells for the queens, but all the cells are of the same size independently of being destinated for workers, queens or drones. The numerous queens which are born are killed soon after emerging from their cells. 4) Changes of feeding in quality and in quantity caused no variation of castes....
Tipo: Info:eu-repo/semantics/article
Ano: 1946
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761946000100015

Sobre o comportamento mitótico e meiótico de cromossomas policêntricos ou com ponto de inserção difuso
Provedor de dados: 43
Autores: Brieger,F. G.; Kerr,Warwick E.
Material: Studies were made mainly with Ascaris megalocephála Cloq. univalens and bivalens, and also with Tityus bahiensis Perty. 1) Somatic pairing of heterochromatic regions. The heterochromatic ends of the somatic chromosomes in Ascaris show a very strong tendency for unspecifical somatic pairing which may occur between parts of different chromosomes (Figs. 1, 2, 3, 7, 10, 11, 12, 13, 14, 16, 18,), between the two ends of the same chromosome either directly (Figs. 4, 5, 7, 8, 11, 12, 13, 15, 16, 17, 18) or inversely (Fig. 8, in the arrow) and also within a same chromosomal arm (Fig. 6). 2) During the early first cleavage division the chomosomes are an isodiametric cylinder (Figs. 6, 9, 11, 13, 14). But in later metaphase the ends become club shaped...
Tipo: Info:eu-repo/semantics/article
Ano: 1949
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761949000100015