Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 155 )

2018 ( 337 )

2017 ( 360 )

2016 ( 388 )

Custom range...

Search Results: 1 - 10 of 200430 matches for " Rodrigo Leandro Braga de Castro;Oliveira "
All listed articles are free for downloading (OA Articles)
Page 1 /200430
Display every page Item
Persistência de óleos essenciais em milho armazenado, submetido à infesta??o de gorgulho do milho
Coitinho, Rodrigo Leandro Braga de Castro;Oliveira, José Vargas de;Gondim Júnior, Manoel Guedes Corrêa;Camara, Claúdio Augusto Gomes da;
Ciência Rural , 2010, DOI: 10.1590/S0103-84782010005000109
Abstract: the essential oils and constituent compounds have been studied for their insecticidal activity against stored grain pests. in this research, persistence of the essential oils in stored maize subject to infestation by maize weevil, sitophilus zeamais mots. (coleoptera: curculionidae) were evaluated. persistence of oils and eugenol were evaluated in the initial period (after impregnation) and at 30, 60, 90 and 120 days of storage. mortalities of s. zeamais in the initial period ranged between 93.8 (piper hispidinervum, melaleuca leucadendron and eugenol) to 100% (eugenia uniflora, green fruits of schinus terebinthifolius and piper marginatum). from the 30th day, mortalities declined, except for p. marginatum (92.2%), which reached 53.1% at 120 days of storage. according to the regression equations adjusted for the number of s. zeamais emerged throughout the storage period, there was no significance for the oils of s. terebinthifolius, p. marginatum and the control. considering general average, the oil of p. marginatum was the most persistent, providing emergency of 0.30 insects; differing from the other oils, as eugenol and the control. the other treatments differed in relation to the control.
Toxicidade por fumiga??o, contato e ingest?o de óleos essenciais para Sitophilus zeamais Motschulsky, 1885 (Coleoptera: Curculionidae)
Coitinho, Rodrigo Leandro Braga de Castro;Oliveira, José Vargas de;Gondim Junior, Manoel Guedes Corrêa;Camara, Cláudio Augusto Gomes da;
Ciência e Agrotecnologia , 2011, DOI: 10.1590/S1413-70542011000100022
Abstract: the sitophilus zeamais species is a major pest of stored maize in brazil. the control is made, usually, using measures of hygiene and cleanliness, synthetic insecticides and fumigant protectors. the search for less toxic products, biodegradable and safe from an ecological point of view is very well accepted by society. the objective of this study was to test the toxicity by contact and ingestion and fumigant of essential oils and eugenol natural organic compound for adults of s. zeamais. the values of lc50 in oil from leaves of piper hispidinervum, eugenia uniflora, cinnamomum zeylanicum, p. marginatum, schinus terebinthifolius, melaleuca leucadendron, green fruits of s. terebinthifolius and eugenol compound in tests of contact and ingestion were estimated at 1.0; 11.6, 14.2, 21.1, 57.7, 75.8, 98.8 and 14.8 l/40 g maize, respectively. the toxicity ratios (tr) ranged from 1.3 to 98.8. in the fumigation of adults, the lethal concentrations ranged from 0.53 to 94.7 l/l air, in the following order of toxicity: p. hispidinervum > p. aduncum > s. terebinthifolius > green fruits of s. terebinthifolius > p. marginatum > eugenol, and the tr ranged from 2.0 to 178.7.
Avalia??o quantitativa de cardenolídeos no cultivar experimental de Digitalis lanata do maci?o do itatiaia e perspectivas de seu emprego industrial
Braga, Fern?o Castro;Kreis, Wolfgang;Récio, Rubens Almeida;Oliveira, Alaíde Braga de;
Química Nova , 1997, DOI: 10.1590/S0100-40421997000500008
Abstract: the content of digoxin and lanatoside c (jointly quantified), lanatoside a, lanatoside b, glucoevatromonoside, odorobioside g, glucogitoroside, glucoverodoxine, glucodigifucoside and digitalinum verum was determined by hplc in digitalis lanata harvested in brazil, as well as in clones industrially employed for the production of cardenolides. the brazilian plants presented greater variation in the contents of cardenolides than the analyzed clones. lanatoside c and digoxin concentrations were higher in the clones (6120±640 nmol/g dry leaf) than in the brazilian plants (1820±900 nmol/g dry leaf). the concentrations of these glycosides were found to be within the range described for native species and also were similar to an european cultivar, what makes possible its industrial use for the cardenolides production.
Antimicrobial activity of Trembleya laniflora , Xyris platystachia and Xyris pterygoblephara
Ventura, Claiton Pires;Oliveira, Alaíde Braga de;Braga, Fern?o Castro;
Revista Brasileira de Farmacognosia , 2007, DOI: 10.1590/S0102-695X2007000100005
Abstract: trembleya laniflora (d. don) cogn. (melastomataceae), xyris platystachia alb. nilss. (xyridaceae) and xyris pterygoblephara kunth., brazilian species collected from a biodiversity hotspot for conservation priority, had their antimicrobial activity evaluated against standardized strains of staphylococcus aureus and micrococcus luteus, by the agar diffusion assay. all extracts, assayed in the concentration of 2000 μg/disc, were active against m. luteus, whereas s. aureus growth was inhibited only by t. laniflora leaves and x. platystachia aerial parts. fractionation of the extracts by partition between immiscible solvents resulted in active fractions from extracts originally inactive against s. aureus. activity was mainly found in low and medium polar fractions. the extract of t. laniflora leaves was also fractionated by silica gel column chromatography and both the hplc fingerprint and antimicrobial activity of the obtained fractions were distinct of those originated from the partition process.
Determinant Factors in Maintaining the Exclusive Breastfeeding and Premature Weaning in Postpartum Mothers in the Brazilian Semiarid  [PDF]
Hellen Lívia Oliveira Catunda, Elizian Braga Rodrigues Bernardo, Lara Leite de Oliveira, Mirna Fontenele de Oliveira, Régia Christina Moura Barbosa Castro, Priscila de Souza Aquino, Ana Karina Bezerra Pinheiro
Health (Health) , 2015, DOI: 10.4236/health.2015.73040
Abstract: This is a cross-sectional, correlational and quantitative study conducted on 210 postpartum women from January to July 2013 at the breastfeeding outpatient clinic of a public maternity. The study was carried out in order to assess the determining factors in maintaining an exclusive breastfeeding in the first month of the newborn’s life, the participation of the nurse in encouraging this process, and the reasons leading to a premature weaning. Prior births proved to be a positive factor for exclusive breastfeeding (Odds Ratio (OR) 0.359; CI 95% 0.137 - 0.941; p = 0.031). The absence of a nurse in the medical appointments resulted in a threefold risk to have no prenatal exclusive breastfeeding guidance whatsoever (OR 3.025; CI 95% 1.567 - 5.840; p = 0.001). The reported reasons for a premature weaning were difficulty latching-on, cracked nipples, poor milk that does not satiate the baby’s hunger, and production of little or no milk at all. The results provide information for the adoption of strategies during pregnancy and the postpartum period aimed to promote an exclusive breastfeeding, checking for the possible influence of the woman’s personal circumstances in her choosing exclusive breastfeeding, as well as the participation of the nurse in the mother’s decision.
Environmental Exposure Associated with Oxidative Stress Biomarkers in Children and Adolescents Residents in Brazilian Western Amazon  [PDF]
Beatriz Fátima Alves de Oliveira, Leandro Vargas Barreto de Carvalho, Dennys de Souza Mour?o, Rita de Cássia Oliveira da Costa Mattos, Hermano Albuquerque de Castro, Paulo Artaxo, Washington Leite Junger, Sandra Hacon
Journal of Environmental Protection (JEP) , 2018, DOI: 10.4236/jep.2018.94023
Abstract: Oxidative stress is a biological process that occurs in response to an imbalance between prooxidant and antioxidant substances and has been described in the pathophysiology of more than 200 clinical disorders. In this study, we evaluate the relationship between genetic, demographic, social, environmental, and health factors and redox imbalance biomarkers in a group of children and adolescents environmentally exposed to atmospheric pollutants and mercury in the Brazilian Western Amazon. This is a cross-sectional study of the relationship between demographic, genetic, and socioenvironmental factors and serum concentrations of redox imbalance biomarkers (thiol groups, malondialdehyde, and glutathione S-transferase [GST]) in children and adolescents living in the municipality of Porto Velho, Rond?nia. The investigated factors were hierarchically organized into groups of variables and their relationship with redox imbalance biomarkers was estimated by a multiple linear regression model. Children and adolescents with asthma, with C-reactive protein values, with the polymorphic variant GSTP1, and exposed to indoor air pollution presented lower thiol serum concentrations when compared to those categorized in their respective reference groups. GST activity and malondialdehyde serum concentrations were positively related to weekly fish consumption and exposure to PM2.5. This study showed that enzymatic GST activity and malondialdehyde serum concentrations are positively associated with environmental factors, especially air pollution (β = 8.64 U/L for GST and β = 0.244 μmol/L for MDA in high exposure group; p-value < 0.01); while serum thiol concentrations presented an inversely proportional relationship with markers of general health status, such asthma (median: 0.45 mmol/L vs. 0.48 mmol/L; p-value < 0.05), acute inflammation (β = -0.25 mmol/L; p-value < 0.01), and positively with genetic factor (β = 0.12 mmol/L for Val/Val; p-value < 0.05).
Conhecimento dos enfermeiros da Saúde da Família sobre os Transtornos Psíquicos no Período Puerperal
Eveline Ponchet Alves,Priscilla Maria de Castro Silva,Elisangela Braga Azevedo,Maria de Oliveira Ferreira Filha
Revista Eletr?nica de Enfermagem , 2011,
Abstract: Os transtornos psíquicos puerperais s o altera es mentais que podem come ar dentro de dias ou semanas após o parto e se manifestam por desequilíbrios de humor psicóticos e n o psicóticos. Este trabalho objetivou analisar o conhecimento dos enfermeiros da Saúde da Família sobre os transtornos psíquicos associados ao período puerperal e as interven es necessárias ao acolhimento dessas demandas. Estudo exploratório-descritivo, realizado com dez enfermeiros de Campina Grande – PB, em 2009. O material empírico foi coletado através de entrevista semiestruturada e tratado através da análise de conteúdo. Os resultados mostraram que os enfermeiros possuem pouco conhecimento sobre os transtornos psíquicos puerperais, desconsiderando a importancia da interven o precoce para minimizar os danos decorrentes dos mesmos para a saúde da m e e do bebê. Conclui-se que é imprescindível uma atualiza o para estes profissionais para que possam ter maior conhecimento sobre a temática, intervindo na preven o desses transtornos e consequentemente fortalecendo o processo de cuidar.
Complications of Surgical Treatment of Anterior Shoulder Dislocation: A Systematic Review  [PDF]
Walter Hugo Brand?o Nascimento, Lailson Oliveira de Castro, Liwerbeth dos Anjos Pereira, Jo?o Paulo Pimentel de Sousa, Paulo Renan Matos Sucupira Cunha, Rodrigo Martins Silva Caetano
Open Journal of Orthopedics (OJO) , 2017, DOI: 10.4236/ojo.2017.79026
Abstract: Introduction: shoulder joint has the greatest range of motion in the human body. The shoulder anatomy promotes high mobility and favors relative sacrifice of articular stability, making it susceptible and more prone to events of instability and dislocation. This review aimed at identifying main complications of surgical treatment of anterior shoulder dislocation. Methodology: This systematic review was conducted according to the International Preferred Reporting Items for Systematic Reviews and Meta-Analyzes (PRISMA) guidelines. Studies which were eligible for this systematic review included: English or Spanish language, studies published from 2000, which mentioned surgical complications of anterior shoulder dislocation in their results, both in open and arthroscopic surgery. Included studies which were required to have at least 1 complication following surgical repair. Only studies from original data were included. Results: We found 228 potentially eligible studies for the survey. Through the inclusion and exclusion criteria and after consensus among reviewers, we chose 9 studies to compose the systematic review. Conclusion: Important information emerges: recurring instability, recurring dislocation, external rotation limitation and arthritis are main surgical complications of anterior shoulder dislocation.
Selectivity of insecticides used in corn crops to adult Trichogrammaatopovirilia (Hymenoptera: Trichogrammatidae) Selectividad de insecticidas usados en maíz a los adultos Trichogrammaatopovirilia (Hymenoptera: Trichogrammatidae)
Revista Colombiana de Entomología , 2010,
Abstract: The aim of this work was to evaluate the toxicity of the insecticides imidacloprid/β-cyfluthrin (Connect 100/12.5 SC), chlorfenapyr (Pirate 240 SC), chlorpyrifos (Astro 450 EW), novaluron (Rimon 100 CE), spinosad (Tracer 480 SC) and triflumuron (Certero 480 SC), as used in corn crops ( Zea mays ), to parent generation females and to F1 and F2 generation specimens of Trichogrammaatopovirilia. Eggs of Anagasta kuehniella were glued to cardstock strips and placed under a germicidal lamp to kill embryos. These were then sprayed with the chemical products using a Potter tower and exposed to parasitism 24, 48, and 96 hours after application of the compounds for a span of 24 hours. We evaluated the number of dead specimens and the number of eggs parasitized by parent generation females, as well as the percent emergence and parasitic capacity of the F1 and F2 generations. Chlorfenapyr, spinosad, chlorpyrifos, and imidacloprid/β-cyfluthrin were moderately harmful to adult T. atopovirilia, while novaluron was slightly harmful. Triflumuron was harmless and could be used in integrated pest management programs intended to preserve adult T. atopovirilia in corn crops. Se evaluó la toxicidad de los insecticidas imidacloprid/ β-ciflutrina (Connect 100/12,5 SC), clorfenapir (Pirate 240 SC), clorpirifos (Astro 450 EW), novalurom (Rimon 100 CE), spinosade (Tracer 480 SC) y triflumurom (Certero 480 SC), utilizados en el cultivo de maíz (Zea mays ), para adultos de la generación maternal de Trichogramma atopovirila y para especímenes de las generaciones F1 y F2. Huevos de Anagasta kuehniella fueron adheridos a cartulinas e irradiados con una lámpara antigermicida para matar a los embriones. Luego, se les aplicó mediante una torre de Potter los productos químicos y se expusieron durante 24 h a parasitismo a las 24, 48 y 96 h después de la aplicación de los compuestos. Se evaluó el número de especímenes muertos y el número de huevos parasitados por hembra de la generación maternal, también el porcentaje de emergencia y la capacidad de parasitismo de las generaciones F1 y F2. Clorfenapis, espinosade, clorpirifós e imidacloprid/β-ciflutrina fueron moderadamente perjudiciales para los adultos de T. atopovirila, mientras novalurom fue levemente perjudicial. Triflumurom fue inocuo y puede ser utilizado en programas de manejo integrado de plagas donde se busque preservar adultos de T. atopovirila en el cultivo de maíz.
Reconstru??o esofágica pela esofagocoloplastia no megaes?fago avan?ado em pacientes gastrectomizados
Aquino, Jose Luis Braga de;Said, Marcelo Manzano;Maziero, Diana;Oliveira, Jean Marc Prado de;Leandro-Merhi, Vania Aparecida;
ABCD. Arquivos Brasileiros de Cirurgia Digestiva (S?o Paulo) , 2009, DOI: 10.1590/S0102-67202009000400003
Abstract: background: esophagocoloplasty in advanced chagasic megaesophagus is seldom necessary. but, when realized, brings with it a major incidence of complications. aim: to verify the complications following esophagus reconstruction by esophagocoloplasty in patients with previous gastrectomy submitted to transmediastinal esophagectomy for chagasic megaesophagus end-stage. methods: from july 1983 to april 2009, 204 patients with chagasic megaesophagus stage iii and iv were submitted to esophageal resection at the surgery department at the hospital celso pierro puc-campinas, brasil. ninety-two patients had the procedure done by esophageal mucosectomy; 84 under-went a transhiatal esophagectomy and in 38, esophagectomies were done through a transthoracic approach. in 194 patients (95%) the reconstruction was done by gastric interposition and in the 10 remaining patients (5%) it was by transposition of the transverse colon. this procedure was recommend due to previous gastrectomy done in all patients. all of them were male with average age of 47.5 years old. results: seven patients (70%) developed one or more complications, either systemic or local. among the systemic complications, one patient had thrombophlebitis in the lower extremity, with good recovery; one had a myocardial infarction with fatal evolution; three patients (30%) had pulmonary infection with good recovery. amongst the local complications, four patients had cervical anastomotic leak with satisfactory recovery with conservative treatment. five had cervical anastomotic stricture between the 35th and the 63rd post-operative day, with good recovery after endoscopic anastomotic dilatations. from the eight patients followed during this period, six (75%) had good deglutition for solids and/or semi-solids, and satisfied with the surgery since were able to return to their regular diet. conclusions: despite the fact that the esophagocoloplasty results in a good deglutition and quality of life, in short and medium terms,
Page 1 /200430
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.