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Search Results: 1 - 10 of 815017 matches for " R.A.M.;Laks "
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Effect of aerobic training on EEG alpha asymmetry and depressive symptoms in the elderly: a 1-year follow-up study
Deslandes, A.C.;Moraes, H.;Alves, H.;Pompeu, F.A.M.S.;Silveira, H.;Mouta, R.;Arcoverde, C.;Ribeiro, P.;Cagy, M.;Piedade, R.A.M.;Laks, J.;Coutinho, E.S.F.;
Brazilian Journal of Medical and Biological Research , 2010, DOI: 10.1590/S0100-879X2010007500041
Abstract: the effect of physical exercise on the treatment of depressive elderly adults has not been investigated thus far in terms of changes in cortical hemispheric activity. the objective of the present study was to identify changes in depressive symptoms, quality of life, and cortical asymmetry produced by aerobic activity. elderly subjects with a diagnosis of major depressive disorder (dsm-iv) were included. twenty patients (70% females, 71 ± 3 years) were divided into an exercise group (pharmacological treatment plus aerobic training) and a control group (undergoing pharmacological treatment) in a quasi-experimental design. pharmacological treatment was maintained stable throughout the study (antidepressants and anxiolytics). subjects were evaluated by depression scales (beck depression inventory, hamilton depression rating scale, montgomery-asberg depression rating scale) and the short form health survey-36, and electroencephalographic measurements (frontal and parietal alpha asymmetry) before and after 1 year of treatment. after 1 year, the control group showed a decrease in cortical activity on the right hemisphere (increase of alpha power), which was not observed in the exercise group. the exercise group showed a significant decrease of depressive symptoms, which was not observed in the control group. this result was also accompanied by improved treatment response and remission rate after 1 year of aerobic exercise associated with treatment. this study provides support for the effect of aerobic training on alpha activity and on depressive symptoms in elderly patients. exercise facilitates the treatment of depressive elderly adults, leading to clinical and physical improvement and protecting against a decrease in cortical activity.
Espectroscopia de impedancia no laboratório de ensino
Chinaglia, D.L.;Gozzi, G.;Alfaro, R.A.M.;Hessel, R.;
Revista Brasileira de Ensino de Física , 2008, DOI: 10.1590/S1806-11172008000400013
Abstract: in this work we show that the configuration of an electrical circuit made up of resistors and capacitors in a black box may be determined using impedance spectroscopy, a technique that has been largely used in several scientific areas. because the complex impedance is measured in this technique, we present basic concepts of a.c. electrical circuits analyzed with the formalism of complex numbers. the experimental setup includes a radiofrequency generator as the a.c. source for the circuit and a double-channel oscilloscope to measure both the real and imaginary parts of the complex impedance of the circuit in the black box. from the impedance spectrum we can not only determine the configuration of the electrical circuit in the black box but also the values of resistors and capacitors used.
Capacidade reprodutiva de Porophyllum ruderale (Jacq.) Cass. Reproductive capacity of Porophyllum ruderale (Jacq.) Cass.
G. de Marinis,A. Lepos,L.P. Friebolin,R.A.M. Musa
Planta Daninha , 1980, DOI: 10.1590/s0100-83581980000100009
Abstract: Uma popula o de Porophyllum ruderale (Jacq.) Cass. ocorrente nos arredores de S o José do Rio Preto (SP) foi estudada quanto à estatura, biomassa epígea seca, número de ramos, de capítulos por ramo e por indivíduo e quanto à produ o de aquênios por capítulo e por indivíduo. Esta última foi relativamente baixa (média de 2510 aquênios) correspondendo, na base de 80% de germinabilidade, à média de 2008 disseminulos viáveis por indivíduo. Esta capacidade reprodutiva é muito superior ao número de indivíduos que habitualmente ocorrem em condi es naturais. A fraca densidade populacional característica da espécie deve ser atribuída, portanto, a outros fatores, tais como, possivelmente, as condi es do solo, a competi o interespecífica e, talvez, a a o de inimigos naturais. A produ o individual de capítulos e de aquênios revelou correla o com a estatura e a biomassa mas o número de aquênios por capítulo (53 em média) n o revelou correla o com a estatura, a biomassa e a produ o individual de capítulos e de aquénios, demonstrando ser um carater pouco afetado pelo vigor vegetativo. A population of Porophyllum ruderale (Jacq.) Cass., a weed of the Compositae family, occurring in a fallow area near S o Jose do RioPreto (State of S o Paulo, Brazil) was studied in regard to: a) height, b) dry epigeous biomass, c) number of branches, d) number of heads per branch, e) number of heads per plant, f) number of achenes per head and g) output of achenes per plant. This output was relatively low (on an average of 2510) corresponding to 2008 viable achenes per plant, taking into account a germination percentage of 80%. The observed reproductive capacity is very higher than the number of mature individuals usually found in the field and does not explain, therefore, the widely scattered distribution of P. ruderale. Environmental factors, possibly soil conditions, interspecific competition and natural enemies, should be taken into account. The number of he ads and ache ne s per plant showed correlation with height and biomass, while the number of achenes per head (on an average of 53) showed no correlation with height, biomass and number of heads and achenes per plant, revealing to be a character little affected by vegetative vigours.
Austenite grain growth calculation of 0.028% Nb steel
Priadi D.,Napitupulu R.A.M.,Siradj E.S.
Journal of Mining and Metallurgy, Section B : Metallurgy , 2011, DOI: 10.2298/jmmb100901001p
Abstract: Modeling of microstructural evolution has become a powerful tool for materials and process design by providing quantitative relationships for microstructure, composition and processing. Insufficient attention has been paid to predicting the austenite grain growth of microalloyed steel and the effect of undissolved microalloys. In this research, we attempted to calculate a mathematical model for austenite grain growth of 0.028% Nb steel, which can account for abnormal grain growth. The quantitative calculation of austenite grain growth generated from this model fit well with the experimental grain growth data obtained during reheating of niobium steels. The results of this study showed that increasing the temperature increases the austenite grain size, with a sharp gradient observed at higher temperatures.
Manejo pré-abate de bovinos de corte no pantanal, Brasil
Andrade,E.N.; Silva,R.A.M.S.; Ro?a,R.O.;
Archivos de Zootecnia , 2009, DOI: 10.4321/S0004-05922009000200018
Abstract: this study has the objective of evaluate the influence of fluvial and road transport on the occurrence of bruising in carcass of slaughtered beef cattle. in this study was observed that from 209 evaluated carcass, 185 (88.5%) presented one or more lesions. in total of evaluated carcass occurred 523 lesions that resulted in 96.158 kg removal of bruises (0.519 kg per animal). in this study was possible the determination of age of bruises by color evaluation. we concluded that of way of transport influenced the occurrence of bruises. the most bruises occurred in the last 24 hours of transport. educational measures will be necessary to reduce the problems of pre-slaughter management.
Effect of suramin on myotoxicity of some crotalid snake venoms
Arruda, E.Z.;Silva, N.M.V.;Moraes, R.A.M.;Melo, P.A.;
Brazilian Journal of Medical and Biological Research , 2002, DOI: 10.1590/S0100-879X2002000600013
Abstract: we investigated the protective effect of suramin, an enzyme inhibitor and an uncoupler of g protein from receptors, on the myotoxic activity in mice of different crotalid snake venoms (a.c. laticinctus, c.v. viridis, c.d. terrificus, b. jararacussu, b. moojeni, b. alternatus, b. jararaca, l. muta). myotoxicity was evaluated in vivo by injecting im the venoms (0.5 or 1.0 mg/kg) dissolved in physiological saline solution (0.1 ml) and measuring plasma creatine kinase (ck) activity. two experimental approaches were used in mice (n = 5 for each group). in protocol a, 1 mg of each venom was incubated with 1.0 mg suramin (15 min, 37oc, in vitro), and then injected im into the mice at a dose of 1.0 mg/kg (in vivo). in protocol b, venoms, 1.0 mg/kg, were injected im 15 min prior to suramin (1.0 mg/kg, iv). before and 2 h after the im injection blood was collected by orbital puncture. plasma was separated and stored at 4oc for determination of ck activity using a diagnostic kit from sigma. preincubation of some venoms (c.v. viridis, a.c. laticinctus, c.d. terrificus and b. jararacussu) with suramin reduced (37-76%) the increase in plasma ck, except for b. alternatus, b. jararaca or l. muta venoms. injection of suramin after the venom partially protected (34-51%) against the myotoxicity of b. jararacussu, a.c. laticinctus and c.d. terrificus venom, and did not protect against c.v. viridis, l. muta, b. moojeni, b. alternatus or b. jararaca venoms. these results show that suramin has an antimyotoxic effect against some, but not all the north and south american crotalid snake venoms studied here.
Effect of suramin on myotoxicity of some crotalid snake venoms
Arruda E.Z.,Silva N.M.V.,Moraes R.A.M.,Melo P.A.
Brazilian Journal of Medical and Biological Research , 2002,
Abstract: We investigated the protective effect of suramin, an enzyme inhibitor and an uncoupler of G protein from receptors, on the myotoxic activity in mice of different crotalid snake venoms (A.c. laticinctus, C.v. viridis, C.d. terrificus, B. jararacussu, B. moojeni, B. alternatus, B. jararaca, L. muta). Myotoxicity was evaluated in vivo by injecting im the venoms (0.5 or 1.0 mg/kg) dissolved in physiological saline solution (0.1 ml) and measuring plasma creatine kinase (CK) activity. Two experimental approaches were used in mice (N = 5 for each group). In protocol A, 1 mg of each venom was incubated with 1.0 mg suramin (15 min, 37oC, in vitro), and then injected im into the mice at a dose of 1.0 mg/kg (in vivo). In protocol B, venoms, 1.0 mg/kg, were injected im 15 min prior to suramin (1.0 mg/kg, iv). Before and 2 h after the im injection blood was collected by orbital puncture. Plasma was separated and stored at 4oC for determination of CK activity using a diagnostic kit from Sigma. Preincubation of some venoms (C.v. viridis, A.c. laticinctus, C.d. terrificus and B. jararacussu) with suramin reduced (37-76%) the increase in plasma CK, except for B. alternatus, B. jararaca or L. muta venoms. Injection of suramin after the venom partially protected (34-51%) against the myotoxicity of B. jararacussu, A.c. laticinctus and C.d. terrificus venom, and did not protect against C.v. viridis, L. muta, B. moojeni, B. alternatus or B. jararaca venoms. These results show that suramin has an antimyotoxic effect against some, but not all the North and South American crotalid snake venoms studied here.
Caracteriza??o de hidrolisados enzimáticos de pescado
Neves, R.A.M.;Mira, N.V.M. de;Marquez, U.M. Lanfer;
Ciência e Tecnologia de Alimentos , 2004, DOI: 10.1590/S0101-20612004000100019
Abstract: enzymatic hydrolysates have been used in the clinical treatment of patients with protein digestion and absorption impairment and have been preferred to mixtures of free amino acids. in this present work, six protein hydrolysates of minced fish, obtained by distinct enzymatic systems were characterized regarding the extent of hydrolysis, distribution of molecular size of peptides, chemical composition and amino acids profiles. the hydrolysis resulted in solubilization of 63,4% to 94,2% of proteins according to the enzymes used and process variables (enzyme substrate ratio and enzyme activity) and was proportional to the degree of hydrolysis. the composition of all the hydrolysates attends the dietary reference intakes for essential amino acids established for adults and infant nutrition. the ratio between the concentration of branched chain and aromatic amino acids (fischer ratio) was higher than 3,5 indicating that the hydrolysates obtained could be useful for dietetic management of patients with chronic liver diseases. the hydrolysates were composed of peptides with fairly defined molecular weights, highlighting the hydrolysate obtained by pepsin and streptomyces griseus protease which showed a high percentage (57%) of peptides smaller than 3kda suitable for use in hypoallergenic formulas.
Altera es séricas de proteína total e eletrólitos em cavalo Pantaneiro durante exercício de longa distancia
Santos S.A.,Silva R.A.M.S.,Azevedo J.R.M.,Mello M.A.R
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2001,
Abstract: Foram colhidas amostras de sangue de oito cavalos Pantaneiro durante uma prova de resistência de 76km através do Pantanal. Um mês antes da prova os cavalos foram distribuídos em dois grupos: 1- quatro cavalos mantidos em pastagem nativa sem suplementa o e sem trabalho; 2- quatro cavalos mantidos em pastagem nativa com suplementa o e submetidos a trabalho. Amostras de sangue foram colhidas antes da prova (pré), durante (meio), ao final (pós) e após um período de recupera o de 30 minutos (descanso). Foram analisadas as concentra es séricas de proteína total (PT), albumina (Alb), sódio (Na), potássio (K), cloro (Cl), cálcio (Ca) e fósforo (P). No final da prova também foram colhidas amostras de suor de cinco cavalos para análise de Na, K e Cl. Durante a prova, houve diminui o significativa nos teores de Ca e K e aumento nos teores de Na e P em ambos os grupos. Os valores médios da taxa cardíaca após 30 minutos de descanso indicaram boa resposta de recupera o.
Parametros cinéticos da degrada??o in vitro de alimentos incubados com inóculo microbiano de diferentes espécies de ruminantes
Bezerra, A.R.G.F.;Malafaia, P.;Mancini, M.C.;Bezerra, E.S.;Vieira, R.A.M.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2005, DOI: 10.1590/S0102-09352005000400010
Abstract: the estimation of the ruminal kinetic parameters of pumpkin, potato-sweet, beet, broccoli, carrot, alfalfa hay, alfalfa pellet and bean, currently used for feeding wild and domestic ruminants raised in the rio de janeiro zoo, was made through in vitro incubation of the feedstuffs together with ruminal fluid obtained from aoudad (ammotragus lervia), sambar deer (cervus unicolor), eland (taurotragus oryx), cattle (bos taurus), buffalo (bubalus bubalis), goat (capra hircus) and sheep (ovis aries). the gas production technique was used to obtain gas profiles, and the data were fitted by the mono or double compartmental model. the kinetic parameters were discrepant among both, animals and feedstuffs, and the double compartmental model gave the best estimation. ruminal inocula from domestic ruminants can not be used to estimate the kinetic parameters of ruminal degradation of feedstuffs for wild ruminants.
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