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Search Results: 1 - 10 of 253630 matches for " Sant'Ana Carlos Eduardo Ramos de "
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Phylogenetic correlograms and the evolution of body size in South American owls (Strigiformes)
Diniz-Filho, José Alexandre Felizola;Sant'Ana, Carlos Eduardo Ramos de;
Genetics and Molecular Biology , 2000, DOI: 10.1590/S1415-47572000000200008
Abstract: during the last few years, many models have been proposed to link microevolutionary processes to macroevolutionary patterns, defined by comparative data analysis. among these, brownian motion and ornstein-uhlenbeck (o-u) processes have been used to model, respectively, genetic drift or directional selection and stabilizing selection. these models produce different curves of pairwise variance between species against time since divergence, in such a way that different profiles appear in phylogenetic correlograms. we analyzed variation in body length among 19 species of south american owls, by means of phylogenetic correlograms constructed using moran's i coefficient in four distance classes. phylogeny among species was based on dna hybridization. the observed correlogram was then compared with 500 correlograms obtained by simulations of brownian motion and o-u over the same phylogeny, using discriminant analysis. the observed correlogram indicates a phylogenetic gradient up to 45 mya, when coefficients tend to stabilize, and it is similar to the correlograms produced by the o-u process. this is expected when we consider that body size of organisms is correlated with many ecological and life-history traits and subjected to many constraints that can be modeled by the o-u process, which has been used to describe evolution under stabilizing selection.
Phylogenetic correlograms and the evolution of body size in South American owls (Strigiformes)
Diniz-Filho José Alexandre Felizola,Sant'Ana Carlos Eduardo Ramos de
Genetics and Molecular Biology , 2000,
Abstract: During the last few years, many models have been proposed to link microevolutionary processes to macroevolutionary patterns, defined by comparative data analysis. Among these, Brownian motion and Ornstein-Uhlenbeck (O-U) processes have been used to model, respectively, genetic drift or directional selection and stabilizing selection. These models produce different curves of pairwise variance between species against time since divergence, in such a way that different profiles appear in phylogenetic correlograms. We analyzed variation in body length among 19 species of South American owls, by means of phylogenetic correlograms constructed using Moran's I coefficient in four distance classes. Phylogeny among species was based on DNA hybridization. The observed correlogram was then compared with 500 correlograms obtained by simulations of Brownian motion and O-U over the same phylogeny, using discriminant analysis. The observed correlogram indicates a phylogenetic gradient up to 45 mya, when coefficients tend to stabilize, and it is similar to the correlograms produced by the O-U process. This is expected when we consider that body size of organisms is correlated with many ecological and life-history traits and subjected to many constraints that can be modeled by the O-U process, which has been used to describe evolution under stabilizing selection.
Effects of Copaiba Oil on Cyclophosphamide-Induced Teratogenesis in Mice  [PDF]
Ana Carolina dos Santos Louren?o, José Eduardo Baroneza, Solange de Paula Ramos, Liliane Kelen Miguel, Luiz Carlos Juliani, Aline Pic-Taylor, Maria José Spar?a Salles
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.523362
Abstract:
Cyclophosphamide is an anti-neoplastic chemotherapy drug which, when administered to animals during the gestational period, provokes visceral, skeletal and external malformations. Copaiba oil obtained from Copaifera L. genus is traditionally used in popular medicine for its anti-inflammatory and antimicrobial activities. However, the effect of copaiba oil onteratogenesis remains unknown. This study aimed to investigate the possible protector effects of copaiba oil on the model of teratogenesis induced by cyclophosphamide in mice. Pregnant female Swiss mice were divided into 8 groups (n = 15). Three groups received copaiba oil, via gavage, in the following doses: 0.3 mL·Kg-1, 0.6 mL·Kg-1 and 0.9 mL·Kg-1 (b.w.), associated to phosphate-buffered saline (PBS), intraperitoneal (i.p.). The negative control group received medium chain triglyceride (MCT) and PBS. The positive control group received cyclophosphamide (30 mg·Kg-1 (b.w.)) and MCT. The three treatment groups called associated groups (A) received one of the doses of copaiba oil, via gavage and an associated dose of cyclophosphamide intraperitoneally. Copaiba oil presented a protective effect against teratogenesis induced by cyclophosphamide in the following skeletal structures: metacarpals, forepaws proximal phalanges, and tail vertebras. It also reduced the hydrocephalus frequency. These data suggest that copaiba oil could be a potential candidate for an anti-teratogenic agent.
Atrophy of the Nitrergic Myenteric Neurons in the Descending Colon Rats Submitted to Protein and Vitamin Deficiency
Araújo,Eduardo José de Almeida; Hermes,Catchia; Miranda Neto,Marcílio Hubner de; Almeida,Elton Carlos de; Sant'Ana,Débora de Mello Gon?ales;
International Journal of Morphology , 2009, DOI: 10.4067/S0717-95022009000300047
Abstract: effects of protein and b-complex vitamin deficiency were assessed with respect to the morphometry of myenteric neurons in the descending colon of adult rats. sixteen animals were divided into two groups: control group (cg, n=8) and experimental group (eg, n=8). the cg received 22% protein chow and the eg received 4% protein chow for 120 days. the descending colon was submitted to nadh- and nadph-diaphorase technique in order to evidence nervous cells in the whole mounts preparations. in the eg, nadh-d positive neurons presented reduced nuclei, while nadph-d positive neurons showed atrophy of the soma area (~41.7%) inducing an increase of the proportion occupied by the nucleus inside in the soma of these cells.
Análise de denti??o mista: tomografia versus predi??o e medida radiográfica
Felício, Letícia Guilherme;Ruellas, Ant?nio Carlos de Oliveira;Bolognese, Ana Maria;Sant'Anna, Eduardo Franzotti;Araújo, M?nica Tirre de Souza;
Dental Press Journal of Orthodontics , 2010, DOI: 10.1590/S2176-94512010000500019
Abstract: objective: the aim of this study was to evaluate the method for mixed-dentition analysis using cone-beam computed tomography for assessing the diameter of intra-osseous teeth and compare the results with those obtained by moyers, tanaka-johnston, and 45-degree oblique radiographs. methods: measurements of mesial-distal diameters of erupted lower permanent incisors were made on plaster cast models by using a digital calliper, whereas assessment of the size of non-erupted permanent pre-molars and canines was performed by using moyer's table and tanaka-johnston's prediction formula. for 45-degree oblique radiographs, both canines and pre-molars were measured by using the same instrument. for tomographs, the same dental units were gauged by means of dolphin software resources. results: statistic analysis revealed high agreement between tomographic and radiographic methods, and low agreement between tomographs and other methods being evaluated. conclusion: cone-beam computed tomography was accurate for mixed-dentition analysis in addition to presenting some advantages over compared measurement methods: observation and measurement of intra-osseous teeth individually with the possibility, however, to view them from different prospects and without superimposition of anatomical structures.
Alterations of the myenteric plexus of the ileum and the descending colon caused by Toxoplasma gondii (genotype III)
Sugauara, Elaine Yae Yamashita;Sant'Ana, Débora de Mello Gon?ales;Almeida, Elton Carlos de;Reis, Anderson Brunetti;Silva, Aristeu Vieira da;Araújo, Eduardo José de Almeida;
Arquivos de Neuro-Psiquiatria , 2008, DOI: 10.1590/S0004-282X2008000400015
Abstract: alterations caused by a genotype iii strain of toxoplasma gondii were assessed with respect to the number and the morphometry of the myenteric neurons in the terminal ileum and the descending colon. eighteen rats were divided into four groups: acute control group (acg, n=4); acute experimental group (aeg, n=4); chronic control group (ccg, n=5) and chronic experimental group (ceg, n=5). nacl solution was administered through gavage to the animals in the acg and ccg. toxoplasma gondii tachyzoites (104) from a genotype iii strain were orally administered to the aeg and ceg. acute groups were died after 24 hours, and the chronic groups after 30 days. neuronal loss was not observed in both organs. the neurons atrophied in the terminal ileum as the opposite occurred with the neurons at the descending colon during the chronic phase of infection. in the terminal ileum, the neurons atrophied during the chronic phase of the infection as no alteration was found during the acute phase. for the descending colon, the neurons became hypertrophic during the chronic infection in opposition to the atrophy found during the acute phase.
Efeito do uso tópico do extrato aquoso de Orbignya phalerata (baba?u) na cicatriza??o de feridas cutaneas: estudo controlado em ratos
Amorim, Elias;Matias, Jorge Eduardo F.;Coelho, Júlio Cézar U.;Campos, Antonio Carlos L.;Stahlke Jr, Henrique Jorge;Timi, Jorge Rufino Ribas;Rocha, Luiz Carlos de Almeida;Moreira, Ana Tereza Ramos;Rispoli, Daniel Zeni;Ferreira, Lydia Masako;
Acta Cirurgica Brasileira , 2006, DOI: 10.1590/S0102-86502006000800011
Abstract: introduction: the mesocarp of babassu (orbignya phalerata) has been used in experimental studies trying to check its pro-inflammatory effect. purpose: to analyse comparatively the histological changes made by the water extract of babassu in skin surgical wounds. methods: sixty wistar adults male rats were used. the experimental procedure was a circle skin incision of 2 cm in diameter made with a metal punch. after this procedure done in all animals, they were randomized in two groups of 30. in the control group, the phytotherapic agent wasn't used but saline solutin. in the experimental group, the water extract of orbignya phalerata was used in the cut sites. all animals were followed and killed after seven, 14 and 21 days. comparative histological analysis was made among the groups. results: in the microscopic view, a significant reepitelization effect on the healing process of the experimental group in relation to the control group in the 7th and 14th days, was recognized. conclusion: the use of the mesocarp of orbignya phalerata in skin surgical wounds contributed positively in the healing process in rats.
Mini-implantes: pontos consensuais e questionamentos sobre o seu uso clínico
Alberto Consolaro,Eduardo Sant'ana,Carlos Eduardo Francischone Jr,Maria Fernanda M-O Consolaro
Revista Dental Press de Ortodontia e Ortopedia Facial , 2008, DOI: 10.1590/s1415-54192008000500003
Abstract:
Segmental LeFort I osteotomy for treatment of a class III malocclusion with temporomandibular disorder
Janson, Marcos;Janson, Guilherme;Sant'Ana, Eduardo;Nakamura, Alexandre;Freitas, Marcos Roberto de;
Journal of Applied Oral Science , 2008, DOI: 10.1590/S1678-77572008000400014
Abstract: this article reports the case of a 19-year-old young man with class iii malocclusion and posterior crossbite with concerns about temporomandibular disorder (tmd), esthetics and functional problems. surgical-orthodontic treatment was carried out by decompensation of the mandibular incisors and segmentation of the maxilla in 4 pieces, which allowed expansion and advancement. remission of the signs and symptoms occurred after surgical-orthodontic intervention. the maxillary dental arch presented normal transverse dimension. satisfactory static and functional occlusion and esthetic results were achieved and remained stable. three years after the surgical-orthodontic treatment, no tmd sign or symptom was observed and the occlusal results had not changed. when vertical or horizontal movements of the maxilla in the presence of moderate maxillary constriction are necessary, segmental lefort i osteotomy can be an important part of treatment planning.
An orthodontic-surgical approach to Class II subdivision malocclusion treatment
Janson, Marcos;Janson, Guilherme;SantAna, Eduardo;Sim?o, Tassiana Mesquita;Freitas, Marcos Roberto de;
Journal of Applied Oral Science , 2009, DOI: 10.1590/S1678-77572009000300026
Abstract: despite the different orthodontic approaches to class ii subdivision malocclusions one has also to consider the skeletal components before undertaking any treatment protocol. significant involvement of the skeletal structures may require a combined surgical orthodontic treatment, which has remained stable for more than four years, as illustrated in this case report.
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