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Search Results: 1 - 10 of 537002 matches for " C. R. N.;Damasceno "
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INFLUêNCIA DO ISOLADO PROTéICO DA SOJA E DA CASEíNA SOBRE A PEROXIDA O LIPíDICA
C. M. A. CHAGAS,D. S. P. ABDALLA,S. M. M. LIMA VERDE,N. R. T. DAMASCENO
Alimentos e Nutri??o , 2009,
Abstract: A peroxida o lipídica está associada à inicia o e progress o da aterosclerose. Componentes dietéticos com a o antioxidante vêm sendo testados, sendo destacada a soja. O objetivo deste estudo foi monitorar a dislipidemia e a peroxida o lipídica em animais suplementados com as proteínas da soja. Coelhos Nova Zelandia (n=20) foram divididos nos grupos: CASEíNA (n=10), recebeu ra o comercial + 1% de colesterol + 27% de caseína e SOJA (n=10), recebeu ra o comercial + 1% de colesterol + 27% de isolado protéico da soja. Foram determinadas as concentra es de colesterol, triglicerídeos, proteínas e malondialdeído no plasma e nas lipoproteínas nos tempos T0 e T45 dias de tratamento. Verificou-se aumento de colesterol no plasma e VLDL do grupo CASEíNA, quando comparado ao grupo SOJA. Ao contrário, o colesterol- HDL, no grupo SOJA, foi maior que no grupo CASEíNA. O efeito das proteínas na concentra o de TBARS foi evidenciado após o ajuste dos resultados pela concentra o de proteínas e triglicerídeos. Verificou-se que a soja reduziu TBARS no plasma e VLDL, quando comparada à caseína. Portanto, os resultados demonstram que o isolado protéico da soja, quando comparada à caseína, exerce a o positiva na redu o da colesterolemia e da peroxida o lipídica.
Estudo da ativa??o ácida e tratamento térmico de bauxita extraída de jazidas em Minas Gerais, Brasil
Prado, C. M. R.;Alves, M. I. R.;Leles, M. I. G.;Medeiros, R. I.;Otto, C. R. N.;Damasceno, F. C.;Brait, C. H. H.;Franco, P. I. B. M.;Antoniosi Filho, N. R.;
Ceramica , 2012, DOI: 10.1590/S0366-69132012000100018
Abstract: brazil is one of the world's leading producers of bauxite. little is known, however, about the chemical and mineralogical characteristics of brazilian bauxite. the objective of this paper is to characterize bauxite in both natural and thermally and chemically activated forms. the transformations occurring during these two processes are described. the results show that the raw bauxite is basically composed of the mineral gibbsite, followed by semicrystalites of goethite and silicon oxide. its characteristics are those of a solid without mesoporosity, with small total surface area and pore diameter and volume. the chemical and physical modifications that occur in the material during the calcination process are governed mainly by the dehydration of the aluminum hydroxides phases, leading to the formation of the boehmite, hematite and alpha alumina phases. calcination results in an increase in the porosity and surface area of the bauxite as well as the appearance of the characteristics of mesoporous and thermally stable materials. the activation of bauxites in an acid medium showed that the transformations in the solid are directly related to the concentration of the acid solution used and result in an increase in the total surface area and pore diameter and volume.
Restless leg syndrome, sleep quality and fatigue in multiple sclerosis patients
Moreira, N.C.V.;Damasceno, R.S.;Medeiros, C.A.M.;de Bruin, P.F.C.;Teixeira, C.A.C.;Horta, W.G.;de Bruin, V.M.S.;
Brazilian Journal of Medical and Biological Research , 2008, DOI: 10.1590/S0100-879X2008001000017
Abstract: we have tested the hypothesis that restless leg syndrome (rls) is related to quality of sleep, fatigue and clinical disability in multiple sclerosis (ms). the diagnosis of rls used the four minimum criteria defined by the international restless legs syndrome study group. fatigue was assessed by the fatigue severity scale (fss >27), quality of sleep by the pittsburgh sleep quality index (psqi >6), excessive daytime sleepiness by the epworth sleepiness scale (ess >10) and clinical disability by the expanded disability status scale (edss). forty-four patients (32 women) aged 14 to 64 years (43 ± 14) with disease from 0.4 to 23 years (6.7 ± 5.9) were evaluated. thirty-five were classified as relapsing-remitting, 5 as primary progressive and 4 as secondary progressive. edss varied from 0 to 8.0 (3.6 ± 2.0). rls was detected in 12 cases (27%). patients with rls presented greater disability (p = 0.01), poorer sleep (p = 0.02) and greater levels of fatigue (p = 0.03). impaired sleep was present in 23 (52%) and excessive daytime sleepiness in 3 cases (6.8%). fatigue was present in 32 subjects (73%) and was associated with clinical disability (p = 0.000) and sleep quality (p = 0.002). age, gender, disease duration, ms pattern, excessive daytime sleepiness and the presence of upper motor neuron signs were not associated with the presence of rls. fatigue was best explained by clinical disability and poor sleep quality. awareness of rls among health care professionals may contribute to improvement in ms management.
Rupture of hepatic artery aneurysm associated with ischemic hepatitis
Santos,V.M.; Villa?a,R.B.; Almeida,A.C.A.; Oliveira,E.R.N.C.; Nogueira Junior,P.R.M.; Damasceno,E.A.M.;
Anales del Sistema Sanitario de Navarra , 2010, DOI: 10.4321/S1137-66272010000300011
Abstract: hepatic artery aneurysms are scarcely reported, mainly because of non-specific symptoms. more often, they are incidental findings during imaging studies to investigate other acute or chronic abdominal conditions. these aneurysms are usually detected in the sixth decade of life, predominantly among males. we report the case of a 69 year-old female with an unsuspected huge hepatic artery aneurysm associated with ischemic hepatitis. suspicion of aneurysm arose during imaging studies to clarify the origin of jaundice and abdominal pain. after establishment of the diagnosis, but before open surgery, there was a spontaneous rupture of the aneurysm, which caused hemoperitoneum and death. the necropsy study confirmed ischemic hepatitis. hepatic artery aneurysms are second among the visceral aneurysms, and may cause abdominal pain, jaundice, and hemorrhagic events. one should suspect abdominal aneurysms in elderly patients with unclear abdominal pain, and this hypothesis should be ruled out by imaging studies.
Plasma concentrations and placental immunostaining of interleukin-10 and tumornecrosis factor-α as predictors of alterations in the embryo-fetal organism and the placental development of diabetic rats
Sinzato, Y.K.;Damasceno, D.C.;Laufer-Amorim, R.;Rodrigues, M.M.P.;Oshiiwa, M.;Taylor, K.N.;Rudge, M.V.C.;
Brazilian Journal of Medical and Biological Research , 2011, DOI: 10.1590/S0100-879X2011007500015
Abstract: interleukin-10 (il-10) appears to be the key cytokine for the maintenance of pregnancy and inhibits the secretion of inflammatory cytokines such as tumor necrosis factor-α (tnf-α). however, there are no studies evaluating the profile of these cytokines in diabetic rat models. thus, our aim was to analyze il-10 and tnf-α immunostaining in placental tissue and their respective concentrations in maternal plasma during pregnancy in diabetic rats in order to determine whether these cytokines can be used as predictors of alterations in the embryo-fetal organism and in placental development. these parameters were evaluated in non-diabetic (control; n = 15) and wistar rats with streptozotocin (stz)-induced diabetes (n = 15). at term, the dams (100 days of life) were killed under anesthesia and plasma and placental samples were collected for il-10 and tnf-α determinations by elisa and immunohistochemistry, respectively. the reproductive performance was analyzed. plasma il-10 concentrations were reduced in stz rats compared to controls (7.6 ± 4.5 vs 20.9 ± 8.1 pg/ml). the placental scores of immunostaining intensity did not differ between groups (p > 0.05). prevalence analysis showed that the il-10 expression followed tnf-α expression, showing a balance between them. stz rats also presented impaired reproductive performance and reduced plasma il-10 levels related to damage during early embryonic development. however, the increased placental il-10 as a compensatory mechanism for the deficit of maternal regulation permitted embryo development. therefore, the data suggest that il-10 can be used as a predictor of changes in the embryo-fetal organism and in placental development in pregnant diabetic rats.
Digestibilidade dos nutrientes do baga?o de mandioca em dietas de novilhas leiteiras
Dias, A.M.;Silva, F.F.;Veloso, C.M.;ítavo, L.C.V.;Pires, A.J.V.;Damasceno, J.C.;Souza, D.R.;Sá, J.F.;Nascimento, P.V.N.;Machado, E.F.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2008, DOI: 10.1590/S0102-09352008000400031
Abstract: the inclusion of 0, 7, 14, and 21% of cassava bagasse was evaluated on apparent digestibility of nutrients in dairy heifers. twenty ?gir x ?holstein dairy heifers averaging 180kg initial mean body were used. the animals were distributed in a completely randomized design and received diets composed by sorghum silage as roughage. the apparent digestibility coefficients (dc) of dry matter (dm), organic matter (om), crude protein (cp), ether extract (ee), neutral detergent fiber (ndf), acid detergent fiber (adf), and non-fiber carbohydrates (nfc) were evaluated and total digestible nutrients of diets (tdn), were determined. dm, om, cp, and adf digestibility coefficients were not affected by treatments. dc of the ee were 80.9, 73.2, 74.7, and 68.3%; for ndf 55.0, 48.3, 49.1, and 37.4% and for nfc of the 87.9, 89.5, 84.6, and 83.1% for 0, 7, 14, and 21% treatments, respectively. tdn content had linear reduction as diet cassava bagasse level increased, showing values of 68.0, 66.2, 67.0, and 62.5% for 0, 7, 14, and 21% treatments, respectively. it is recommended the inclusion of cassava bagasse for dairy heifers diet until 14%.
Aporte de nutrientes pela serapilheira em uma área degradada e revegetada com leguminosas arbóreas
Costa, G. S.;Franco, A. A.;Damasceno, R. N.;Faria, S. M.;
Revista Brasileira de Ciência do Solo , 2004, DOI: 10.1590/S0100-06832004000500014
Abstract: the aim of this work was to evaluate the nutrient input through litterfall, in one area degraded by soil remotion, replanted with ten-year-old nitrogen-fixing legume trees acacia auriculiformis (acácia), gliricidia sepium (gliricídia), and mimosa caesalpiniifolia (sabiá) and another neighbor area with a secondary growth atlantic forest ("capoeira") fragment. the experiment was carried out at the embrapa - agrobiologia research station, km 47, seropédica, state of rio de janeiro, brazil. the litterfall was quantified in litter traps with an area of 0.25 m2; nutrients and polyphenols of the litter components were determined. the litterfall quantity varied according to the legume tree species, reaching a dry mass (dm) of 5.7 mg ha-1 year-1 where gliricídia predominated, and 11.2 mg ha-1 year-1 under sabiá land cover including some litterfall from acácia. the litterfall production under "capoeira" was 9.2 mg ha-1 year-1 . the gliricídia litterfall showed the lowest polyphenol concentration and was richest in nutrients (n, p, ca, and mg), representing the most favorable litter quality for decomposition processes. the nutrient input was correlated with the amount of litterfall. the annual nutrient input in kg ha-1 year-1 ranged from 130-170 for n, 4.9-7.9 for p, 24-31 for k, 150-190 for ca, and 29-40 for mg. these values are similar or superior to those observed in "capoeira" which are 140 for n, 4.9 for p, 110 for ca, and 31.7 for mg, except for 63 for k. land revegetation with legume trees added large quantities of organic matter and n to the system through litterfall in a relatively short time, improving nutrient cycling and the rehabilitation process.
Poly(2-Furyl)Methylenesulfide as a Resin to Uptake of Metal Ions from Aqueous Solutions
Damasceno, J.;Gomes, C.A.T.;Rieumont, J.;Sanchez, R.;
Materials Research , 2002, DOI: 10.1590/S1516-14392002000200018
Abstract: the polymerization of poly (2- furyl) methylenesulfide ? polythiofurfural ? was performed in an 0.36 mol/l aqueous solution of furfuraldehyde, saturated by bubbling hydrogen sulfide for 2 h at different temperatures. the reaction product was thoroughly washed and dried at 40 °c under vacuum. poly (2-furyl) methylenesulfyde is a yellow powder with a rather unpleasant odor. the polythiofurfural obtained [ -ch(c4h3o)-s-] is a furan with thiols end groups. these are active adsorption centers for metal ions. the polythiofurfural was soluble in acetone and chloroform and its yields attained 80%. morphological analysis by scanning eletronic microscopy indicates a regular and dense surface in an interesting spacial arrangement. preliminary isotherms adsorption studies indicate specific affinity forni (ii) and co (ii) and different capacity adsorption, 0.022 and 0.045 mmol per gram, respectively.
Poly(2-Furyl)Methylenesulfide as a Resin to Uptake of Metal Ions from Aqueous Solutions
Damasceno J.,Gomes C.A.T.,Rieumont J.,Sanchez R.
Materials Research , 2002,
Abstract: The polymerization of poly (2- furyl) methylenesulfide -- POLYTHIOFURFURAL -- was performed in an 0.36 mol/L aqueous solution of furfuraldehyde, saturated by bubbling hydrogen sulfide for 2 h at different temperatures. The reaction product was thoroughly washed and dried at 40 °C under vacuum. Poly (2-furyl) methylenesulfyde is a yellow powder with a rather unpleasant odor. The polythiofurfural obtained [ -CH(C4H3O)-S-] is a furan with thiols end groups. These are active adsorption centers for metal ions. The polythiofurfural was soluble in acetone and chloroform and its yields attained 80%. Morphological analysis by Scanning Eletronic Microscopy indicates a regular and dense surface in an interesting spacial arrangement. Preliminary isotherms adsorption studies indicate specific affinity forNi (II) and Co (II) and different capacity adsorption, 0.022 and 0.045 mmol per gram, respectively.
Role of the NO/K ATP pathway in the protective effect of a sulfated-polysaccharide fraction from the algae Hypnea musciformis against ethanol-induced gastric damage in mice
Samara R. B. Damasceno,Jocélia C. Rodrigues,Renan O. Silva,Lucas A. D. Nicolau
Revista Brasileira de Farmacognosia , 2013,
Abstract: Seaweeds are the most abundant source of polysaccharides such as alginates and agar, as well as carrageenans. This study aimed to investigate the gastroprotective activity and the mechanism underlying this activity of a sulfated-polysaccharide fraction extracted from the algae Hypnea musciformis (Wulfen) J.V. Lamour. (Gigartinales-Rhodophyta). Mice were treated with sulfated-polysaccharide fraction (3, 10, 30, and 90 mg/kg, p.o.) and, after 30 min, they were administered 50% ethanol (0.5 mL/25 g, p.o.). After 1 h, gastric damage was measured using a planimeter. In addition, samples of the stomach tissue were obtained for histopathological examination and for assays to determine the glutathione and malondialdehyde levels. Other groups of mice were pretreated with N G-nitro-L-arginine methyl ester (L-NAME, 10 mg/kg, i.p.), aminoguanidine (100 mg/kg, i.p.), or glibenclamide (10 mg/kg, i.p.). After 30 min to the aminoguanidine group and 1 h to the other groups, sulfated-polysaccharide fraction (30 mg/kg, p.o.) was administered and gastric damage was induced as described above. Sulfated-polysaccharide fraction prevented ethanol-induced gastric injury in a dose-dependent manner. However, treatment with L-NAME or glibenclamide reversed this gastroprotective effect. Administration of aminoguanidine did not influence the effect of sulfated-polysaccharide fraction. Our results suggest that sulfated-polysaccharide fraction exerts a protective effect against ethanol-induced gastric damage via activation of the NO/K ATP pathway.
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