Consulta: creatorFacets:"Cordeiro,Célia Maria Torres"
Registros recuperados: 6
Data/hora: 10/06/2024 03:20:41

Variability in micronucleus induction with different mutagens applied to several species of fish
Provedor de dados: 74
Autores: Grisolia,Cesar Koppe; Cordeiro,Célia Maria Torres.
Fish are often used for screening genotoxicity of water. For such programs, a knowledge of the sensitivity to clastogens, spontaneous micronucleus frequency and cell cycle kinetics of the target tissue is necessary. To investigate the pattern of inter-specific sensitivity to micronucleus induction three species of fish, Tilapia rendalli, Oreochromis niloticus and Cyprinus carpio, were exposed to the clastogens bleomycin (BLM), cyclophosphamide (CP), 5-fluorouracil (5-FU), and mitomycin C (MMC). The binucleate/mononucleate ratio in peripheral erythrocytes exposed to cytochalasin B was also used to evaluate the time-dependent response of micronucleus formation during hematopoesis in the kidney and the micronucleus peak in peripheral erythrocytes....
Tipo: Info:eu-repo/semantics/article
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000100041

Cholesterol oxidase interference on the emergence and viability of cotton boll weevil larvae
Provedor de dados: 86
Autores: Santos,Roseane Cavalcanti; Monnerat,Rose Gomes; Sá,Maria de Fátima Grossi de; Cordeiro,Célia Maria Torres; Gomes,Ana Cristina; Gander,Eugen Silvano.
The aim of this work was to evaluate the influence of the enzyme cholesterol oxidase (Coase) on emergence and viability of larvae of the cotton boll weevil (Anthonomus grandis Boheman, 1843). A series of bioassays was performed with eggs and neonate larvae exposed to different enzyme concentrations in artificial diet. Larval survival was affected at all enzyme concentrations tested, and the six-day LD50 was 53 mug/mL (CI 95%: 43-59). Coase also interfered with hatching of larvae after eggs were floated for 15 min in Coase solution at different concentrations. Observations at the light and electronic microscopic level of midguts from larvae fed on artificial diet containing 53 mug/mL of Coase and collected at six days revealed highly vacuolated regions in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anthonomus grandis; Insecta; Animal tissues; Epithelium; Intestinal histology.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002001100002

Polymorphism of the grasshopper Rhammatocerus schistocercoides populations revealed by RAPD
Provedor de dados: 86
Autores: Silva,João Batista Tavares da; Tigano,Myrian Silvana; Magalhães,Bonifácio Peixoto; Cordeiro,Célia Maria Torres.
The objective of this work was to study the genetic variability of the grasshopper Rhammatocerus schistocercoides (Orthoptera: Acrididae) using RAPD analysis among individuals from three populations, one from Colombia and two from Brazil (Goiás and Mato Grosso States). Ninety scorable binary markers were obtained by fingerprinting with 11 oligonucleotide primers. Most of the polymorphism was attributed to 42 markers with variable frequency among the different populations. Although the existence of significant difference among populations (P&lt;0.0001), most of the genetic variability was found within populations (87.7% of total variation). Pairwise distances between Colombian and Brazilian populations were 0.12 (P&lt;0.0001) and 0.18 (P&lt;0.0001) for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insecta; Genetic marker; Genetic variation; Genetic distance.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002001100020

Associação do polimorfismo do gene do hormônio de crescimento com a caraterística peso em bovinos da raça Nelore
Provedor de dados: 96
Autores: Unanian,Maria Marina; Barreto,Cristine Chaves; Freitas,Alfredo Ribeiro de; Cordeiro,Célia Maria Torres; Josahkian,Luiz Antonio.
O polimorfismo do gene do hormônio de crescimento bovino (bGH) foi estudado em 211 bovinos machos da raça Nelore, puros de origem (PO), a fim de observar as freqüências genotípicas e alélicas, e a possível associação com a característica peso. Para alcançar este objetivo, foram considerados os pesos ao nascer, à desmama e mensais dos 10 aos 16 meses de idade, e calculados os ganhos de peso do nascimento à desmama e da desmama aos 16 meses. Foi coletado sangue para extração do DNA e análise dos sítios polimórficos (RFLP) oriundos da digestão com as endonucleases Msp I (bGH/Msp I, 891 pb), Hae III (bGH/Hae III, 441 pb) e Alu I (bGH/Alu I, 427 pb). Para cada polimorfismo foram encontrados dois alelos, ocorrendo predominância dos alelos D, F e A,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bovinos; Gene do hormônio de crescimento; Pesos; Raça Nelore.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982000000500016

Relação da circunferência escrotal e parâmetros da qualidade do sêmen em touros da raça Nelore, PO
Provedor de dados: 96
Autores: Silva,Antonio Emidio Dias Feliciano; Unanian,Maria Marina; Cordeiro,Célia Maria Torres; Freitas,Alfredo Ribeiro de.
Em 960 touros da raça Nelore, PO, de 11,4 a 135 meses de idade, pertencentes a fazendas localizadas nos Estados de São Paulo, Goiás e Pará, estudou-se a possível associação entre o tamanho da circunferência escrotal (CE) e os parâmetros da qualidade do sêmen, motilidade progressiva (MOT) e patologias espermáticas: defeitos maiores (DEFMAI), menores (DEFMEN) e totais (DEFTOT). Os touros foram divididos por faixas etárias em: menores que 18, de 18 a 24, de 24 a 30, de 30 a 36 e maiores que 36 meses de idade. Este estudo foi realizado com a finalidade de obter tamanhos de CE que possam indicar o estatus funcional dos testículos, ou seja, a qualidade do sêmen, a serem utilizados para predizer o potencial reprodutivo dos animais destinados à seleção de...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Circunferência escrotal; Motilidade; Nelore; Patologias espermáticas.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982002000500012

Possible Associations between Bovine Growth Hormone Gene Polymorphism and Reproductive Traits
Provedor de dados: 52
Autores: Unanian,Maria Marina; Barreto,Cristine Chaves; Cordeiro,Célia Maria Torres; Freitas,Alfredo Ribeiro; Josahkian,Luiz Antonio.
The polymorphism of the bovine growth hormone gene (bGH) was studied in 211 Nellore pure breed males for association with reproductive traits. Scrotal circumference and testosterone concentrations were collected monthly from 10 until 16 months of age. Additionally, testicular growth rates were calculated. DNA was amplified by PCR and digested using Msp I and Hae III restriction enzymes. Every polymorphism presented two alleles. The predominant alleles were D (0.85) and F (0.98), respectively, and genotype EE - bGH/Hae III was missing. Significant association (P&lt;0.05) between bGH/Msp I polymorphism, scrotal circumference and testicular growth after puberty, as well as between bGH/Hae III and testosterone concentrations at puberty were detected. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bull; Growth hormone gene polymorphism; Testosterone concentrations.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000300007