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Search Results: 1 - 10 of 36848 matches for " Roberto Macedo;Ribeiro "
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Método para a espacializa??o dos elementos do balan?o hídrico climatológico
Cecílio, Roberto Avelino;Silva, Kennedy Ribeiro da;Xavier, Alexandre Candido;Pezzopane, José Ricardo Macedo;
Pesquisa Agropecuária Brasileira , 2012, DOI: 10.1590/S0100-204X2012000400002
Abstract: the objective of this work was to develop and evaluate a method for the spatial distribution of the climatic water balance (cwb) elements. the method applies terrain digital models containing the spatial distribution of climate elements used as input data of cwb. evaluation was made with existing cwb data from 110 pluviometric stations of espírito santo state, brazil. the proposed method's performance was compared to the one of the following spatial interpolators: kriging and inverse distance weighting. the proposed method presented best predictions of the spatial distribution of all cwb elements - actual evapotranspiration, water deficit, water surplus and water availability.
Caulerpin as a potential antiviral drug against herpes simplex virus type 1
Nathália Regina Porto Vieira Macedo,Michele S. Ribeiro,Roberto C. Villa?a,Wilton Ferreira
Revista Brasileira de Farmacognosia , 2012,
Abstract: About 80% of the human adult population is infected with HSV-1. Although there are many anti-HSV-1 drugs available (acyclovir, ganciclovir, valaciclovir, foscarnet), their continuous use promotes the selection of resistant strains, mainly in ACV patients. In addition to resistance, the drugs also have toxicity, particularly when administration is prolonged. The study of new molecules isolated from green algae with potential antiviral activity represents a good opportunity for the development of antiviral drugs. Caulerpin, the major product from the marine algae Caulerpa Lamouroux (Caulerpales), is known for its biological activities such as antioxidant, antifungal, acetylcholinesterase inhibitor (AChE) and antibacterial activity. In this work, we show that caulerpin could be an alternative to acyclovir as an anti-HSV-1 drug that inhibits the alpha and beta phases of the replication cycle.
DELIMITA??O DE SíTIOS FLORESTAIS E ANáLISE DOS FRAGMENTOS PERTENCENTES NA BACIA DO RIO ITAPEMIRIM
Gabriel Paiva,Yhasmin; Ribeiro da Silva,Kennedy; Macedo Pezzopane,José Eduardo; Quint?o de Almeida,André; Avelino Cecílio,Roberto;
Idesia (Arica) , 2010, DOI: 10.4067/S0718-34292010000100003
Abstract: itapemirim river watershed (bri) brings a great potential to the development of forestry undertakings due to its environmental, social and economics characteristics. this paper shows the delimitation of forestry sites at bri accounting for climactic, soil and topographical data. a study of the atlantic forest fragments conditions at bri was also done. forestry sites were delimitated using srtm elevation data, thorntwaite & matter water balance and soil classes maps. atlantic forest fragments were individualized by visual classification of cbers-ccd satellite images. results showed that the use of climatic, soil and topographical data are very helpful in forestry sites delimitation.
Tipo físico ideal e satisfa??o com a imagem corporal de praticantes de caminhada
Damasceno, Vinicius Oliveira;Lima, Jorge Roberto Perrout;Vianna, Jeferson Macedo;Vianna, Viviane Ribeiro ávila;Novaes, Jefferson Silva;
Revista Brasileira de Medicina do Esporte , 2005, DOI: 10.1590/S1517-86922005000300006
Abstract: the objective of the present study was to quantify the ideal physical type and to verify the body image satisfaction level of regular walkers. one hundred and eighty six individuals participated in this study as follows: 87 women (age = 28.70 ± 12.6 years, stature = 161.6 ± 6.2 cm, body mass = 58.9 ± 12.0 kg and fat = 25.7 ± 7.8 f%) and 98 men (age = 27.9 ± 12.9 years, stature = 177.2 ± 6.9 cm, body mass = 75.0 ± 12.3 kg and fat = 13.3 ± 6.1 f%). the individuals were asked to indicate which profile corresponded to his/her body and which profile they wanted to reach. only 24% of women are satisfied. profile 3 was pointed as ideal to be reached by 55% of women (profile 2 = 18%; and profile 4 = 21%). profile 3, according to results of this study, corresponded to f% of 20.5 ± 0.9% (epm) and to mbi of 20.0 ± 0.3 kg/m2 (epm). in relation to men, only 18% are satisfied. profile 4 was pointed as ideal by 46% of men (profile 3 = 23%; and profile 5 = 19%). profile 4 corresponds to f% of 9.8 ± 1.4% (epm) and to bmi of 23.1 ± 0.4 kg/m2 (epm). there is an ideal physical type for both genders. no difference with body image satisfaction degree between genders was verified.
Influencia del cambio climático en los escenarios del futuro sobre plantaciones de Eucalipto
Rody, Yhasmin Paiva;Cecílio, Roberto Avelino;Pezzopane, José Eduardo Macedo;Ribeiro, Aristides;Almeida, André Quint?o de;
Revista Ciência Agron?mica , 2012, DOI: 10.1590/S1806-66902012000300008
Abstract: the genus eucalyptus presents a large commercial potential and it is the arboreal species most planted in brazil. perspectives of climate change in the future projections of the ipcc (intergovernmental panel on climate change) indicate that productivity losses may occur in diverse agricultural and forestry crops. the objective of this study was to determine the zones apt for planting of eucalyptus based on relief and climate data for current and future scenarios. the study was developed in the state of espírito santo, brazil, and normal climatological data was obtained from rain gauges. the water balance was calculated by the tornthwaite and mather methodology. temperature was estimated using data of latitude and altitude. data from the srtm were used to obtain the altitude and zone of agricultural mechanization, based on slopes. for interpolation of the data, the inverse square distance method was used. the future data were estimated by the hadcm3 model of the ipcc in scenarios: a (pessimistic) and b (optimistic) for the years of 2020, 2050 and 2080. it is estimated that the zones suitable for planting are reduced in both scenarios, diminishing by 71.1% and 82% for scenarios a and b, respectively in the year 2080. the water deficit acted as a limiting factor for planting. due to the complexity of interactions of biotic and abiotic factors, new capability studies should be performed in the context of climate change.
Does Branched-Chain Amino Acids Supplementation Modulate Skeletal Muscle Remodeling through Inflammation Modulation? Possible Mechanisms of Action
Humberto Nicastro,Claudia Ribeiro da Luz,Daniela Fojo Seixas Chaves,Luiz Roberto Grassmann Bechara,Vanessa Azevedo Voltarelli,Marcelo Macedo Rogero,Antonio Herbert Lancha Jr.
Journal of Nutrition and Metabolism , 2012, DOI: 10.1155/2012/136937
Abstract: Skeletal muscle protein turnover is modulated by intracellular signaling pathways involved in protein synthesis, degradation, and inflammation. The proinflammatory status of muscle cells, observed in pathological conditions such as cancer, aging, and sepsis, can directly modulate protein translation initiation and muscle proteolysis, contributing to negative protein turnover. In this context, branched-chain amino acids (BCAAs), especially leucine, have been described as a strong nutritional stimulus able to enhance protein translation initiation and attenuate proteolysis. Furthermore, under inflammatory conditions, BCAA can be transaminated to glutamate in order to increase glutamine synthesis, which is a substrate highly consumed by inflammatory cells such as macrophages. The present paper describes the role of inflammation on muscle remodeling and the possible metabolic and cellular effects of BCAA supplementation in the modulation of inflammatory status of skeletal muscle and the consequences on protein synthesis and degradation.
Avalia??o de níveis de fósforo na dieta de novilhos Nelore em crescimento: efeitos no desempenho
Nicodemo, Maria Luiza Franceschi;Moraes, Sheila da Silva;Rosa, Ivan Valad?o;Macedo, Manuel Cláudio Motta;Thiago, Luiz Roberto Lopes de S.;Anjos, Cláudio Ribeiro dos;
Revista Brasileira de Zootecnia , 2000, DOI: 10.1590/S1516-35982000000400033
Abstract: the adequacy of the recommendation of phosphorus for growing nellore steers was evaluated by means of the weight gain, feed intake and feed:gain ratio during 250 days. fifteen steers were fed a basal p-deficient but otherwise adequate in the other nutrients, enabling gains of 500 g/day. the diet was supplemented (treatment 1 = 15 g p/day, treatment 2 = 11 g p/day) or not (treatment 3 = 5 g p/day) with monoammonium phosphate. phosphorus deficiency did not affect organic matter in vivo digestibilities determined at 60 days and at the end of the experiment, nor dry matter digestibility at the end of the experiment. average dry matter intakes were 5.56, 5.28 and 3.69 kg/day, for treatments 1, 2 and 3, respectively. feed intake, weight gain and feed:gain ratio were reduced by phosphorus deficiency. steers fed 11 g of p/day gained 500-600 g/day without signs of deficiency.
Uso de parametros ósseos, plasmáticos e fecais na determina??o da deficiência de fósforo em bovinos
Nicodemo, Maria Luiza Franceschi;Moraes, Sheila da Silva;Rosa, Ivan Valad?o;Macedo, Manuel Cláudio Motta;Thiago, Luiz Roberto Lopes de S.;Anjos, Cláudio Ribeiro dos;
Revista Brasileira de Zootecnia , 2000, DOI: 10.1590/S1516-35982000000300029
Abstract: fifteen nellore steers were allotted to three treatments, consisting of a basal diet, which will be able to provide gains of about 600 g/day, supplemented (15 or 11 g p/day) or not (5 g p/day) with monoammonium phosphate in order to evaluate the alterations in bone, plasma and fecal measurements due to p deficiency. rib biopsies were taken at 60 and 250 days of trial, plasma samples were taken every 15 days, and fecal grab samples were analyzed in seven occasions along the trial. total daily fecal collection was performed in two occasions, at 60 and 243 days of the trial, for seven days. at day 60, p expressed as fresh bone, dried defatted bone and bone volume were able to detect treatment differences. at day 250, cortical thickness, p and ash concentrations were reduced in p deficiency. plasma inorganic p (pi) was lower at 12 days of trial, with values close to 3,0 mg % at the time where daily weight gain was affected (day 82). calcium and total alkaline phosphatase increased in p deficiency, without changes on the plasma hidroxyproline concentration. fecal p concentrations increased as the dietary p concentrations increased, but grab samples did not allow early detection of p deficiency. the definition of critical p levels for the determination of deficiency showed problems.
Mordida cruzada posterior: uma classifica??o mais didática
Locks, Arno;Weissheimer, André;Ritter, Daltro Enéas;Ribeiro, Gerson Luiz Ulema;Menezes, Luciane Macedo de;Derech, Carla D?Agostini;Rocha, Roberto;
Revista Dental Press de Ortodontia e Ortopedia Facial , 2008, DOI: 10.1590/S1415-54192008000200017
Abstract: the aim of this work is to present a new posterior crossbite classification, being this more didactic and of easy understanding, differing from the others in your nomenclature, preserving, however, the basic principles that govern the orthodontics. this new classification makes the posterior crossbite diagnosis process systematized and accurate, assisting the clinician in the elaboration of a suitable treatment plan and as consequence, leading to more favorable prognostic of this malocclusion.
Does Branched-Chain Amino Acids Supplementation Modulate Skeletal Muscle Remodeling through Inflammation Modulation? Possible Mechanisms of Action
Humberto Nicastro,Claudia Ribeiro da Luz,Daniela Fojo Seixas Chaves,Luiz Roberto Grassmann Bechara,Vanessa Azevedo Voltarelli,Marcelo Macedo Rogero,Antonio Herbert Lancha Jr.
Journal of Nutrition and Metabolism , 2012, DOI: 10.1155/2012/136937
Abstract: Skeletal muscle protein turnover is modulated by intracellular signaling pathways involved in protein synthesis, degradation, and inflammation. The proinflammatory status of muscle cells, observed in pathological conditions such as cancer, aging, and sepsis, can directly modulate protein translation initiation and muscle proteolysis, contributing to negative protein turnover. In this context, branched-chain amino acids (BCAAs), especially leucine, have been described as a strong nutritional stimulus able to enhance protein translation initiation and attenuate proteolysis. Furthermore, under inflammatory conditions, BCAA can be transaminated to glutamate in order to increase glutamine synthesis, which is a substrate highly consumed by inflammatory cells such as macrophages. The present paper describes the role of inflammation on muscle remodeling and the possible metabolic and cellular effects of BCAA supplementation in the modulation of inflammatory status of skeletal muscle and the consequences on protein synthesis and degradation. 1. Introduction Skeletal muscle presents unique features that allow it to respond to several exogenous stimuli. This characteristic is named “plasticity” [1]. Exercise and nutrition are examples of such stimuli that may promote adaptive responses in skeletal muscle in terms of structure and function [2–4]. For example, there are some reports describing that mechanical stimuli, particularly resistance exercise, may induce histological changes such as fiber type transition and profile and increase in cross-sectional area [5], and alterations in muscle function [6, 7]. Branched-chain amino acids (BCAA), especially leucine, are also well-known nutrients that may influence the adaptive response of skeletal muscle. Leucine supplementation has been described as a potential nonpharmacological tool able to stimulate both muscle anabolism and decrease catabolism [8, 9] and to modulate glucose homeostasis [10]. Furthermore, leucine can act synergistically with exercise to improve the efficiency and effectiveness of these adaptive responses [11]. Currently, there are some cellular pathways that partially explain why BCAA supplementation may promote such responses in skeletal muscle. Most of these consistent evidences were observed on incubated cells, which have contributed to elucidate important mechanisms regarding amino acids modulation of skeletal muscle protein turnover. However, we have to consider that such conditions are considerably different from the human body. Although experimental animals (rodents) represent an in vivo
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