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Search Results: 1 - 10 of 34849 matches for " Rodrigo Martins Ribeiro "
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Efeitos de diferentes esfor?os de luta de jud? na atividade enzimática, atividade elétrica muscular e parametros biomecanicos de atletas de elite
Ribeiro, Silvia Regina;Tierra-Criollo, Carlos Julio;Martins, Rodrigo álvaro Brand?o Lopes;
Revista Brasileira de Medicina do Esporte , 2006, DOI: 10.1590/S1517-86922006000100006
Abstract: the sportive training causes neuromuscular adaptations and metabolic alterations aiming the competition performance. in judo competitions, the number of fights to what athletes are submitted, as well as their respective endurance and intervals are randomized, and these factors may influence the aimed training performance. this study investigated the hypothesis that different fight endurances, 90s, 180s, and 300s could influence the enzymatic and muscular electrical activity, as well as the torque peak production. before and after each fighting, a blood sampling was collected from each athlete. after and before each fight, they performed five dynamic contractions (90o/s) using an isokinetic dynamometer (biodex system 3). simultaneously, it was recorded the electromyographic signal of the agonist, antagonist and synergistic muscles of the movement assessed. it was observed no alterations in the torque. the ast and alt enzymes presented an increasing activity in the 90 sec. (p = 0.0033/p = 0.00059), 180 sec. (p = 0.0044/p = 0.0033), and in the 300 sec. (p = 0.0044/p = 0.0033) fights. it was verified an increase (p = 0.0180) in the ck activity after the 300 sec. fight. ldh decreased after the 90 sec. fight (p = 0.0392). upon the intermuscular analysis, it was observed an increase in the electromyographic signal of the agonist muscle after the 90 sec. fight (p = 0.005), an increase of the antagonist muscle in the 180 sec. fight (p = 0.0129), and a decrease (p = 0.0137) in the activity of the agonist muscle in the 300 sec. fight. it was observed that the strength in the 300 sec. fight might reduced the injuries in the muscular tissue characterized by a raise in the plasmatic ck, although the injury was not sufficient to detect the fatigue through the isokinetic dynamometry. it can be concluded that the proposed protocol was sufficient to the enzymatic and electromyographic alteration, suggesting metabolic and neural adaptations from stress caused by the judo fights.
ROW SPACING AND SOWING DENSITIES FOR LATE CROPPING MAIZE IN THE TOCANTINS STATE, BRAZIL ESPA AMENTO E DENSIDADE DE SEMEADURA PARA A CULTURA DO MILHO, EM PLANTIO TARDIO, NO ESTADO DO TOCANTINS
Flávio Sérgio Afférri,Edgar Pereira Martins,Joenes Mucci Peluzio,Rodrigo Ribeiro Fidelis
Pesquisa Agropecuária Tropical , 2008, DOI: 10.5216/pat.v38i2.4174
Abstract: The levels of maize productivity currently reached in the State of Tocantins, Brazil, are placed below the potential of this crop, due to, among other factors, the lack of knowledge on the best sowing density and row spacing. The present study was carried out with the objective of evaluating the effect of plant distribution on the grain yield, in kg.ha-1. Two maize genotypes (AGN2012 and BRS2020), in two sowing densities (50,000 and 60,000 plants.ha-1), were used, in row spacing of 50 cm, 65 cm, and 80 cm, in Alvorada (TO), in the 2004/2005 growing season. Considering the results, it was possible to observe that the AGN2012 cultivar was more productive than the BRS2020, with significant difference, according to the F test (5% probability), for grain yield. The stalk diameter and plant height increased significantly (p < 0.05), as row spacing decreased. The ear height, diameter, length, and weight of one hundred seeds were not influenced by the evaluated row spacing and density. KEY-WORDS: Density; hybrids; agronomic features. Os níveis de produtividade do milho, atualmente atingidos no Estado do Tocantins, colocam-se abaixo do potencial da cultura, devido, entre outros fatores, à ausência de conhecimento sobre a melhor densidade e espa amento de semeadura. O presente trabalho foi realizado com o objetivo de avaliar o efeito da distribui o de plantas sobre a produtividade de gr o, em kg.ha-1. Foram utilizados dois genótipos de milho (AGN2012 e BRS2020), em duas densidades de semeadura (50.000 e 60.000 plantas.ha-1), nos espa amentos de 50 cm, 65 cm e 80 cm, no município de Alvorada (TO), na safra agrícola 2004/2005. Através dos resultados obtidos, p de-se observar que a cultivar AGN2012 foi mais produtiva que a cultivar BRS2020, ocorrendo diferen a significativa, pelo teste F, a 5% de probabilidade, para a produtividade de gr os. As variáveis diametro de colmo e altura de plantas aumentaram, significativamente (p < 0,05), à medida que se diminuiu o espa amento entre linhas. Os componentes altura, diametro e comprimento de espiga e peso de cem sementes n o foram influenciados pelos espa amentos e densidades em estudo. PALAVRAS-CHAVE: Densidade; híbridos; caracteres agron micos.
ESPA AMENTO E DENSIDADE DE SEMEADURA PARA A CULTURA DO MILHO, EM PLANTIO TARDIO, NO ESTADO DO TOCANTINS
Flávio Sérgio Afférri,Edgar Pereira Martins,Joenes Mucci Peluzio,Rodrigo Ribeiro Fidelis
Pesquisa Agropecuária Tropical , 2008,
Abstract: Os níveis de produtividade do milho, atualmenteatingidos no Estado do Tocantins, colocam-se abaixo do potencialda cultura, devido, entre outros fatores, à ausência deconhecimento sobre a melhor densidade e espa amento desemeadura. O presente trabalho foi realizado com o objetivo deavaliar o efeito da distribui o de plantas sobre a produtividadede gr o, em kg.ha-1. Foram utilizados dois genótipos de milho(AGN2012 e BRS2020), em duas densidades de semeadura(50.000 e 60.000 plantas.ha-1), nos espa amentos de 50 cm, 65cm e 80 cm, no município de Alvorada (TO), na safra agrícola2004/2005. Através dos resultados obtidos, p de-se observarque a cultivar AGN2012 foi mais produtiva que a cultivarBRS2020, ocorrendo diferen a significativa, pelo teste F, a 5%de probabilidade, para a produtividade de gr os. As variáveisdiametro de colmo e altura de plantas aumentaram,significativamente (p < 0,05), à medida que se diminuiu oespa amento entre linhas. Os componentes altura, diametro ecomprimento de espiga e peso de cem sementes n o foraminfluenciados pelos espa amentos e densidades em estudo.
Purification and Properties of Polygalacturonase Produced by Thermophilic Fungus Thermoascus aurantiacus CBMAI-756 on Solid-State Fermentation
Eduardo da Silva Martins,Rodrigo Sim?es Ribeiro Leite,Roberto da Silva,Eleni Gomes
Enzyme Research , 2013, DOI: 10.1155/2013/438645
Abstract: Polygalacturonases are enzymes involved in the degradation of pectic substances, being extensively used in food industries, textile processing, degumming of plant rough fibres, and treatment of pectic wastewaters. Polygalacturonase (PG) production by thermophilic fungus Thermoascus aurantiacus on solid-state fermentation was carried out in culture media containing sugar cane bagasse and orange bagasse in proportions of 30% and 70% (w/w) at 45°C for 4 days. PG obtained was purified by gel filtration and ion-exchange chromatography. The highest activity was found between pH 4.5 and 5.5, and the enzyme preserved more than 80% of its activity at pH values between 5.0 and 6.5. At pH values between 3.0 and 4.5, PG retained about 73% of the original activity, whereas at pH 10.0 it remained around 44%. The optimum temperature was 60–65°C. The enzyme was completely stable when incubated for 1 hour at 50°C. At 55°C and 60°C, the activity decreased 55% and 90%, respectively. The apparent molecular weight was 29.3?kDa, of 1.58?mg/mL and of 1553.1?μmol/min/mg. The presence of Zn+2, Mn+2, and Hg+2 inhibited 59%, 77%, and 100% of enzyme activity, respectively. The hydrolysis product suggests that polygalacturonase was shown to be an endo/exoenzyme. 1. Introduction Pectinases are a heterogeneous group of enzymes that hydrolyze the pectic substances present in plant material. The classification of pectinases is based on their mode of attack on the galacturan backbone of the pectin molecule, on specificity by substrate, or according to region of molecule where it acts [1]. The polygalacturonases catalyze the hydrolysis of glycosidic α-1-4 linkages in pectic acid and are of two types: endo-polygalacturonases (endo PG, EC 3.2.1.15), which act by hydrolysis of internal glycosidic bonds α-1-4 of polygalacturonic acid at random form, resulting in molecule depolymerization with release of oligogalacturonic acids, and exo-polygalacturonases (exo PG, EC 3.2.1.67) which hydrolyse alternate α-1-4 glycosidic linkages of polygalacturonic acid from the nonreducing end, releasing unsaturated mono- or digalacturonic acids [2, 3]. This group of enzymes has been widely used in the food industry process such as clarification and viscosity reduction of fruit juices, preliminary treatment of grape juice for wine industries, tomato pulp extraction, oil extraction, and tea fermentation and in the textile industry in fibers degumming [4, 5]. In the literature, it has been reported that the type of fermentation influences the enzymes properties, such as thermostability and tolerance to pH
Compara??o do desempenho no teste de uma repeti??o máxima utilizando dois diferentes protocolos
Chagas, Mauro Heleno;Lima, Fernando Vitor;Avelar, Alexandre de Souza;Diniz, Rodrigo César Ribeiro;Martins-Costa, Hugo Cesar;
Revista da Educa??o Física / UEM , 2012, DOI: 10.4025/reveducfis.v23i1.11312
Abstract: the purpose of this study was to compare the performance in one repetition maximum (1rm) testing using two different test protocols in a bench press exercise. a total of 17 weight-trained men performed two protocols to determine the 1rm bench press exercise. in protocol a, the weight should be lifted for one repetition per attempt until fail on the next attempt. in protocol b, subjects should lift the weight for two repetitions in each attempt and the heaviest weight that could be lifted until a concentric muscle action fail at the second repetition was considered as representative of 1rm. each subject performed the two protocols and the testing order was randomly assigned and balanced between the subjects. significant difference between protocols a and b was found. the results suggest that protocols a and b using by 1rm testing in bench press exercise were not interchangeable.
Eficiência do uso de nitrogênio em genótipos de arroz de terras altas
Fidelis, Rodrigo Ribeiro;Rodrigues, Adelmo Martins;Silva, Gabriela Figueiredo;Barros, Hélio Bandeira;Pinto, Leandro Cardoso;Aguiar, Raimundo Wagner Souza;
Pesquisa Agropecuária Tropical , 2012, DOI: 10.1590/S1983-40632012000100018
Abstract: rice plants present a high demand for nutrients, being nitrogen the main limiting factor to their yield. the objective of this study was to verify the existence of differences among local and improved rice genotypes, concerning the nitrogen efficiency use, in a brazilian savannah soil, in gurupi, tocantins state, brazil. seven rice cultivars (brs-caiapó, brs-bonan?a, epagri-114, brs-sertaneja, brs-primavera, brsmg-conai, and brsmg-curinga) were cultivated in two distinct environments. in order to simulate environments with high and low nitrogen contents, 20 kg ha-1 and 120 kg ha-1 of n were respectively applied. the experiments were carried out in a completely randomized blocks design, with four replications. the features evaluated were grain yield, days for flowering and ripening, lodging, plants height, and 100 grains weight. it was possible to conclude that the environment with high nitrogen content was responsible for the highest plants height, the environment with low nitrogen content delayed the cultivars flowering stage, and the brsmg-curinga cultivar was the only one that reacted to the fertilization increase, with a significant increase in grains yield.
Manifesta??es clínicas e desafios diagnósticos na Síndrome de incontinentia pigmenti
Kataguiri, Paula;Martins, Felipe Cortizas Ré;Yamada, Vivien;Salom?o, Gustavo;Ribeiro, Rodrigo;Rehder, José Ricardo Carvalho Lima;
Revista Brasileira de Oftalmologia , 2010, DOI: 10.1590/S0034-72802010000600009
Abstract: incontinentia pigmenti (bloch-sulzberger syndrome) is a rare, x-linked dominant disorder that involves ectodermal tissues of multiple systems. cutaneous manifestations appear at birth or within a few weeks after. we aimed to describe ophthalmological, dermatological and radio diagnostic findings of a patient with incontinentia pigmenti. a twenty-six year old girl was followed at abc medicine school for visual loss, retina and cutaneous lesions with the diagnosis of incontinentia pigmenti confirmed by a skin biopsy. she had delayed eruption of her teeth some of which were conical. to conclude early management of retinal changes in incontinentia pigmenti is essential because they may be serious leading to blindness.
Suplementa??o com óleo de soja na dieta de potros
Pastori, Waleska Tobo;Ribeiro, Rodrigo Martins;Fagundes, Marco Henrique Ramos;Prezotto, Ligia Dias;Gobesso, Alexandre Augusto de Oliveira;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000900020
Abstract: four foals, sired by the same stallion, aged between 10 and 12 months and 270 ± 9.80 kg average weight, were alloted in a 4 x 4 balanced latin square design. the effects were analyzed of the inclusion of the levels of 5, 10, 15 and 20% of soybean oil in the concentrate on the acceptability, nutrient digestibilities and on total cholesterol plasma concentrations and its fractions: very low density lipoprotein (vldl-c), low-density lipoprotein (ldl-c), high-density lipoprotein (hdl-c) and total triglycerides (trg). the increase in the level of soybean oil in the diet affected the digestibilities of organic matter, neutral detergent fiber and acid detergent fiber that presented a quadratic response which decreased after a expected values of 10.7, 9.5 and 10.5% ether extract in the concentrate, respectively. there was a linear response of the soybean oil levels on the cholesterol plasma concentration and ldl-c that showed a decrease of 0.65 mg/dl cholesterol and 0.58 mg/dl ldl-c for each 1% increase in ether extract in the concentrate. the inclusion of soybean oil affected the digestibility of the diet, especially the cell wall and the plasma cholesterol and ldl-c concentrations.
Efeito da inclus?o de diferentes fontes lipídicas e óleo mineral na dieta sobre a digestibilidade dos nutrientes e os níveis plasmáticos de gordura em equinos
Ribeiro, Rodrigo Martins;Pastori, Waleska Tobo;Fagundes, Marco Henrique Ramos;Prezotto, Ligia Dias;Gobesso, Alexandre Augusto de Oliveira;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009001000019
Abstract: the objective of this study was to assess the effects of including animals or vegetable fats and mineral on the acceptability, nutrient digestibility and triglyceride plasma concentrations and cholesterol in horses. four foals aged 13 to 16 months were used receiving diet containing grass hay and concentrate. the experimental design was a latin square; using orthogonal contrasts. the acceptability was not influenced by the quantity nor the type of oil added to the diets. the smallest dry matter (dm) digestibility values, organic matter (om) and ether extract (ee) were observed for the diets with the addition of mineral oil (58.90, 60.29 and 32.02%) compared to the control diet, whose values were 62.58, 64.41 and 77.71%. the ee digestibility coefficient obtained for the diets with animal fat (90.26%) and vegetable fat (86.47%). the diet with mineral oil reduced the hdl-c concentration (68.75 mg/dl) compared to the control diet (76.00 mg/dl). the adition of fat sources and mineral oil did not influence the acceptability of the diet by the horses. the vegetable oil did not differ from animal fat regarding nutrient digestibility, but these fat sources affected ether extract digestibility. the addition of mineral oil reduced the plastmatic hdl-c levels while the addition of animal fat and vegetable fat did not alter the cholesterol plasmatic concentrations.
Digestibilidade aparente e concentra es plasmáticas de triglicérides e colesterol em equinos alimentados com fontes de óleo vegetal Apparent digestibility and plasmatic concentration of triglycerides and cholesterol in horses fed vegetable oil
Alexandre Augusto de Oliveira Gobesso,Ana Maria Moreira de Freitas Oliveira Moreira,Waleska Tobo Tamas,Rodrigo Martins Ribeiro
Revista Brasileira de Saúde e Produ??o Animal , 2011,
Abstract: Para avaliar os efeitos da inclus o dietética de diferentes fontes de óleo vegetal sobre a digestibilidade aparente total e as concentra es plasmáticas de triglicérides, colesterol total e as suas fra es, foram utilizados, durante 60 dias, quatro potros de diferentes ra as, com idade de 18,5±1,3 meses e peso inicial de 322±15kg, distribuídos em um Quadrado Latino Balanceado (quatro tratamentos e quatro repeti es). Os tratamentos diferiram entre si em fun o da fonte de gordura vegetal adicionada (óleo de soja, linha a, canola ou palma), na propor o de 5% da quantidade total da dieta. A avalia o da digestibilidade aparente dos nutrientes da dieta foi realizada através do método de colheita total de fezes durante três dias consecutivos, após oito dias de adapta o às dietas, e, no terceiro dia de colheita de fezes de cada período, foram colhidas amostras de sangue para avalia o dos lipídeos plasmáticos. N o foi observada diferen a entre tratamentos para a digestibilidade aparente dos nutrientes da dieta ou para os valores plasmáticos de triglicérides, colesterol total e suas fra es. Concluí-se que os óleos de palma, soja, canola ou linha a, podem ser utilizados indistintamente como fonte de energia em dietas para eqüinos. To determine apparent digestibility, cholesterol and plasmatic triglycerides of equine diets containing different sources of vegetable oil, 4 cross-breeding foals aging 18,5±1,3 month and weighing 322±15kg were tested during 60 days in randomized 4x4 Latin square. Treatments differed according to the source of vegetable fat (soybean oil, linseed, canola or palm) added at 5% of total diet. The evaluation of the digestibility of nutrients was performed using total collection of feces during three consecutive days, after eight days of diet adaptation, and at the third day of each fecal collection period, blood samples were collected for assessment of plasma lipids. We conclude that the oil palm, soybean, canola and flaxseed, may be used interchangeably as an energy source in diets for horses.
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