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Search Results: 1 - 10 of 377621 matches for " L. N. Coelho "
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Ventilatory behaviors of the toad Bufo marinus revealed by coherence analysis
Coelho, F. C.;Baker, T. L.;Smatresk, N. J.;
Brazilian Journal of Biology , 2003, DOI: 10.1590/S1519-69842003000100005
Abstract: breathing in amphibians is a remarkably complex behavior consisting of irregular breaths that may be taken singly or in bouts that are used to deflate and inflate the lungs. the valves at the two outlets of the buccal cavity (nares and glottis) need to be finely controlled throughout the bout for the expression of these complex respiratory behaviors. in this study, we use a technique based on the calculation of the coherence spectra between respiratory variables (buccal pressure; narial airflow; and lung pressure). coherence was also used to quantify the effects of chemoreceptor and pulmonary mechanoreceptor input on narial and glottal valve behavior on normoxic, hypoxic, and hypercapnic toads with both intact and bilaterally sectioned pulmonary vagi. we found a significant reduction in narial coherence in hypoxic vagotomized toads indicating that pulmonary mechanoreceptor feedback modulates narial opening duration. an unexpectedly high coherence between pl and pb during non-respiratory buccal oscillations in hypercapnic toads indicated more forceful use of the buccal pump. we concluded that the coherence function reveals behaviors that are not apparent through visual inspection of ventilatory time series.
Ventilatory behaviors of the toad Bufo marinus revealed by coherence analysis
Coelho F. C.,Baker T. L.,Smatresk N. J.
Brazilian Journal of Biology , 2003,
Abstract: Breathing in amphibians is a remarkably complex behavior consisting of irregular breaths that may be taken singly or in bouts that are used to deflate and inflate the lungs. The valves at the two outlets of the buccal cavity (nares and glottis) need to be finely controlled throughout the bout for the expression of these complex respiratory behaviors. In this study, we use a technique based on the calculation of the coherence spectra between respiratory variables (buccal pressure; narial airflow; and lung pressure). Coherence was also used to quantify the effects of chemoreceptor and pulmonary mechanoreceptor input on narial and glottal valve behavior on normoxic, hypoxic, and hypercapnic toads with both intact and bilaterally sectioned pulmonary vagi. We found a significant reduction in narial coherence in hypoxic vagotomized toads indicating that pulmonary mechanoreceptor feedback modulates narial opening duration. An unexpectedly high coherence between Pl and Pb during non-respiratory buccal oscillations in hypercapnic toads indicated more forceful use of the buccal pump. We concluded that the coherence function reveals behaviors that are not apparent through visual inspection of ventilatory time series.
Associa??o entre estado nutricional, hábitos alimentares e nível de atividade física em escolares
Coelho, Lorene G.;Candido, Ana Paula C.;Machado-Coelho, George L. L.;Freitas, Silvia N. de;
Jornal de Pediatria , 2012, DOI: 10.2223/JPED.2211
Abstract: objective: to analyze the relation between nutritional status, food habits and physical activity level in schoolchildren. methods: a cross-sectional study was carried out with 661 schoolchildren, from 6 to 14 years old, enrolled in public and private schools located in the urban area of ouro preto, state of minas gerais, brazil. a semi-structured questionnaire was applied to collect data on demographic, socio-economic, anthropometric and level of physical activity variables. schoolchildren were classified according to criteria for body mass index by age, body fat percentage and physical activity level, respectively. dietary data were collected through a validated food frequency questionnaire specific for children and adolescents. food consumption was evaluated according to an adaptation of the recommended foods score, whose objective is the assessment of overall diet quality with a focus on healthy food consumption. results: we observed high frequency of overweight according to body mass index per age (20.1%) and body fat percentage (22.8%), as well as physical inactivity (80.3%) among schoolchildren. we also found low scores on the recommended foods score in 77.2% of students. there was no significant relation between overweight and physical inactivity or food consumption (p > 0.05). conclusion: schoolchildren had a high frequency of overweight, which, alone, was not associated with the high physical inactivity and the low quality diet observed. therefore, more studies should be performed to identify other factors besides those already described, which may be influencing overweight in this population.
A laparoscopia no diagnóstico das doen as intra-abdominais. Análise de 168 casos
Andreollo N. A.,Coelho Neto J. de S.,Lopes L. R.,Brandalise N. A.
Revista da Associa??o Médica Brasileira , 1999,
Abstract: A laparoscopia tem sido mais freqüentemente indicada nos últimos anos na complementa o diagnóstica de afec es abdominais e na identifica o de repercuss es abdominais de doen as sistêmicas. Modernos equipamentos incluindo video-laparoscopia e o uso de agulhas de biópsias e outros instrumentais permitem elevada seguran a e significante capacidade diagnóstica. OBJETIVO: Empregar a laparoscopia no diagnóstico de doen as abdominais e sistêmicas. MéTODOS: Durante os últimos 9 anos, 168 doentes foram submetidos a laparoscopia e as principais indica es foram: ascites (43 casos - 25,5%); doen as hepáticas (42 casos - 25%); cancer gástrico (37 casos - 22%); linfomas (17 casos - 10,1%); tumores abdominais (9 casos - 5,4%); tuberculose peritoneal (8 casos - 4,8%); tumores hepáticos (6 casos - 3,6%); cisto mesentérico (1 caso - 0,6%) e outras doen as (5 casos - 3,0%). Noventa e nove pacientes eram masculinos (58,9%), com idade variando de 9 a 78 anos (47,6 anos). Biópsias hepáticas foram realizadas em 92 casos (54,7%) e outras biópsias tumorais em 26 casos (15,4%). RESULTADOS: O diagnóstico da doen a foi estabelecido ou confirmado em 145 casos (86,3%). Em 25 casos de cancer gástrico (67,5%), a laparoscopia contra-indicou a laparotomia em fun o de detec o de doen a avan ada. Dois pacientes apresentaram hemorragia (1,2%) após biópsias hepáticas e a laparotomia foi imediatamente indicada. Um doente, cujo diagnóstico era de lupus sistêmico, apresentou abscesso abdominal, broncopneumonia e faleceu (0,6%). CONCLUS O: O procedimento tem pequeno número de complica es e quando empregado como método diagnóstico complementar, evita a laparotomia e agiliza medidas terapêuticas.
Hiperplasia adrenal congênita: dosagem da 17-hidroxiprogesterona basal para sele??o e casos para realiza??o do teste de estímulo com ACTH sintético
Nóbrega, Lúcia Helena Coelho;Lima, Josivan Gomes de;Nóbrega, Maria Lúcia Coelho;Brito, Ana Luiza de Souza;Mendon?a, Raphael Pinto de;
Revista Brasileira de Ginecologia e Obstetrícia , 2004, DOI: 10.1590/S0100-72032004000400005
Abstract: introduction: adrenal hyperplasia is a common genetic disorder and 95% of the cases are due to a 21-hydroxylase deficiency. clinical presentation varies from life-threatening salt-losing adrenal hyperplasia to simple androgenic states, which can be of late-onset and very similar to polycystic ovary syndrome. diagnosis is usually made by synthetic acth provocative tests but efforts are being made to simplify this investigation. objective: to evaluate basal 17-hydroxyprogesterone as a predictor of the provocative test for the diagnosis of late-onset congenial adrenal hyperplasia. methods: a total of 122 patients under clinical suspicion of diagnosis of late-onset congenial adrenal hyperplasia were included and retrospectively evaluated in the study. such suspicion included signs and/or symptoms of hyperandrogenism (hirsutism, acne, oily skin, menstrual irregularity etc.). all the patients were submitted to the 0.25mg synthetic acth provocative test (synacthen?). after resting for 60 minutes, the samples were taken in the basal time and 60 minutes after the administration of 0.25mg synthetic acth, in order to assay 17-hydroxiprogesteron, the venous access being kept through a heparinized catheter. radioimmuoessay was the method used to accomplish the assay of seric 17-hydroxiprogesteron. the sensitivity and specificity of the basal 17-hydroxiprogesteron were measured, assessing several cutoff points. roc curves were made to analyze the test performance, using the software medcalc?. results: roc curve analysis showed that the best cutoff point was 181 ng/dl, which was very similar to the most common recommendation of 200 ng/dl of the literature. the cutoff point of 200 ng/dl shows positive and negative predictive values of 75 and 100%, and accuracy of 98,4% as a diagnostic test for late-onset adrenal hyperplasia. conclusions: considering our data, we suggest that all hyperandrogenic patients should start the investigation with basal 17-hydroxyprogesteron and in case it
O método Mézières ou a revolu o na ginástica ortopédica: o manifesto anti-desportivo ou a nova metodologia de treino
L. Coelho
Motricidade , 2008,
Abstract: EXCERTO:Em termos ditos ‘músculo-esqueléticos’, pode considerar-se que o conhecimento dos métodos de fisioterapia que consubstanciam teorética e pragmaticamente a “interven o postural” constitui uma base de sapiência fundamental para a boa presta o do profissional de “educa o física” e o profissional de saúde especializado. Dentro das abordagens de natureza fisioterapêutica, diversos métodos de tratamento podem ser utilizados, sendo que os mesmos podem ser divididos em duas grandes categorias: tratamentos analíticos (centrados fundamentalmente nos sintomas do doente e realizados sobretudo a nível local) e tratamentos holísticos (centrados na causa dos sintomas do doente e realizados a nível global). Os tratamentos holísticos aparecem substanciados na forma de métodos mais ou menos globais que tendem a ver a pessoa como um todo inextricável. No contexto do presente artigo, s o considerados tratamentos ditos holísticos todos aqueles que centram a sua ac o num ponto de análise da estrutura corporal do sujeito, visto como um todo. Falamos, nomeadamente, na postura corporal e, portanto, nos métodos de interven o postural (e mais precisamente de Reeduca o postural). (...)
A laparoscopia no diagnóstico das doen?as intra-abdominais. Análise de 168 casos
Andreollo, N. A.;Coelho Neto, J. de S.;Lopes, L. R.;Brandalise, N. A.;Leonardi, L. S.;
Revista da Associa??o Médica Brasileira , 1999, DOI: 10.1590/S0104-42301999000100008
Abstract: the laparoscopy has been more and more frequently indicated in the last years, for the complementary diagnosis of intraabdominal diseases and abdominal repercussion of systemic diseases. modern equipaments including videolaparoscopy and the use of either forceps or biopsy needle permit higher safety and significant diagnostic capacity. purpose: to perform laparoscopy for the diagnosis of intraabdominal and sistemic diseases. methods: during the last 9 years 168 patients were submitted to laparoscopy and the main indications were: ascites - 43 cases (25,5%); liver diseases - 42 cases (25%); gastric cancer - 37 cases (22%); lymphoma - 17 cases (10,1%); abdominal tumour - 9 cases (5,4%); peritoneal tuberculosis - 8 cases (4,8%); liver tumour - 6 cases (3,6%); mesenteric cyst - 1 case (0,6%) and other diseases - 5 cases (3,0%). ninety nine patients were male (58,9%) aging from 9 to 78 years old (median 47,6 years). liver biopsies were performed in 92 cases (54,7%) and other tumour biopsies in 26 cases (15,4%). results: the diagnosis of the diseases were established or confirmed by laparoscopy in 145 patients (86,3%). in 25 cases of gastric cancer (67,5%) laparoscopy contraindicated the laparotomy, owing to advanced disease. two patients presented bleeding (1,2%) after liver biopsies and laparotomy was immediately indicated. one of them, whose diagnosis was systemic lupus, presented abdominal abscess, bronchopneumony and died (0,6%). conclusion: laparoscopy has small number of complications, and when employed as a diagnostic complementary method therapeutic procedures, avoids laparotomies and accelerate therapeutic procedures.
Análise físico-química, microbiológica e sensorial de brotos de lentilha da variedade PRECOZ
Loures, Neoraldo Thadeu Pacheco;Nóbrega, Lúcia Helena Pereira;Coelho, Silvia Renata Machado;
Acta Scientiarum. Agronomy , 2009, DOI: 10.1590/S1807-86212009000400008
Abstract: this trial aimed to evaluate a precocious variety of lentil (lens esculenta), developed and grown in argentina, named precoz, to be used for sprout production, using a thermal polyurethane box with a lateral drain to allow the water to flow off. the process was carried out in darkness at room-controlled temperature. germination began in the second day after the imbibing practice, while sprouts development came on until the sixth day, with 86% germination percentage. eight days after sowing, weights were put on sprouts to create a physiological stress as well as to increase ethylene synthesis and improve the quality of produced sprouts. they were also submitted to microbiological tests, whose values were superior to 1.1 x 104 nmp g-1 for fecal coliforms, with acidity of 2.64% and a ph of 5.48, with low acidity. there was no growth of salmonella or escherichia coli, once the levels were lower than 10 ufc g-1. the physiochemical analyses, in 100 grams of sprouts, presented 54.34 g of carbohydrates; 6.24 g of crude fiber and 25.56 g of protein. non-trained taster persons were submitted to sensory tests in order to compare, according to palatability, which was more acceptable - sprouts of alfalfa or beans. the acceptability of lentils was 73.3%, with only 13.3% of rejection and 13.3% of indifference; these results were inferior to beans, which had 96.7% of acceptability and 3.3% of rejection, as well as alfalfa, which had 83.3% of acceptability and 10.00% of rejection. according to the low rejection and indifference, it is possible to suggest that the studied variety of lentil can be used in the production of sprouts, as a nutritional nourishing complement.
Um método eficiente para a detec??o de Phytophthora cinnamomi associada com a Doen?a da Tinta do Castanheiro na rizosfera de Castanheiro (Castanea sativa Mill.)
Gouveia,E.; Coelho,V.; Sousa,N.; Coutinho,S.; Nunes,L.; Monteiro,Maria Loreto;
Revista de Ciências Agrárias , 2009,
Abstract: the life cycle of phytophthora cinnamomi rands and p. cambivora (petri)buisman, both species associated with ink disease of chestnut, occurs entirely in soil. the presence of any of these parasitic species is a limiting constraint for new plantations of sweet chestnut and represents a serious problem for established groves. sensitive and fast detection methods are necessary to guarantee the absence of inoculum in the propagation material and to evaluate the sanitary condition of soils. in this study a method that involved a baiting assay conjugated with selective agar medium was developed. as biological baits, leaf discs of sweet chestnut (castanea sativa), holly trees (ilex aquifolium) and camellia (camellia japonica) were used, at 25 oc and normal laboratory conditions with or without addition of biocides (pimaricin and penicillin) in the water of soil dilution. the leaf discs of sweet chestnut were more efficient for detection of phytophthora and greater percentage of positive isolations were always obtained in the selective medium p10vph. results of this study allow us to establish an efficient protocol for detection of p. cinnamomi associated with ink disease of chestnut in the rhizosphere of sweet chestnut.
Perfil ultra-sonográfico do crescimento embrionário/fetal ovino do 21o ao 41o dia de gesta o.
Marcos Chalhoub Coelho Lima,M. D. Lopes,N. C. Prestes,A. L.Ribeiro Filho
Revista Brasileira de Saúde e Produ??o Animal , 2005,
Abstract: RESUMO: Este estudo objetivou avaliar o perfil de crescimento embrion rio/fetal ovino do 21 o ao 41 o dia de gesta § £o atrav s de avalia § £o ultra-sonogr fica. Para tanto, foram realizados exames ultra-sonogr ficos transretais com transdutor de 5,0 MHz, tr as vezes por semana, em ovelhas submetidas a esquema de sincroniza § £o de cio e posterior monta controlada. A an lise de regress £o quadr tica que incluiu a rela § £o do di ¢metro embrion rio/fetal (DEF) e dias de gesta § £o apresentando a seguinte equa § £o: DEF = 45,9995 - 3,4320xdias + 0,079xdias2 com um coeficiente de determina § £o (r2) de 87,71%, denotando, desta forma, o perfil de crescimento no per -odo experimental. PALAVRAS CHAVE: Ovino, ultra-sonografia, crescimento embrion rio/fetal, prenhez. SUMMARY: This study was developed to evaluate the ovine embryonic-foetal growth profile from 21 o to 41 o day of pregnancy through ultrasonographic evaluation. The examinations were performed with transrectal ultrasonoghaphy with 5,0 MHz probe, three times a week, in ewes sumitted a estrus sincronization and natural breeding. The quadratic equation included the relatiotionship betwenn crown-rump (CR) and gestation in days was: CR = 45,9995 - 3,4320xdays + 0,079xdays2 and the coefficient of determination (r2) was 87,71%. Denoting the embryonic and fetal growth profile in the experiment. KEYWORDS: Ultrasound, embrionic/foetal growth, pregnancy.
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