Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 61
Primeira ... 1234 ... Última
Imagem não selecionada

Imprime registro no formato completo
Biological functions of selenium and its potential influence on Parkinson's disease Anais da ABC (AABC)
ELLWANGER,JOEL H.; FRANKE,SILVIA I.R.; BORDIN,DIANA L.; PRÁ,DANIEL; HENRIQUES,JOÃO A.P..
ABSTRACT Parkinson's disease is characterized by the death of dopaminergic neurons, mainly in the substantia nigra, and causes serious locomotor dysfunctions. It is likely that the oxidative damage to cellular biomolecules is among the leading causes of neurodegeneration that occurs in the disease. Selenium is an essential mineral for proper functioning of the brain, and mainly due to its antioxidant activity, it is possible to exert a special role in the prevention and in the nutritional management of Parkinson's disease. Currently, few researchers have investigated the effects of selenium on Parkinson´s disease. However, it is known that very high or very low body levels of selenium can (possibly) contribute to the pathogenesis of Parkinson's disease,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Neurodegeneration; Nutrition; Oxidative stress; Parkinson's disease; Selenium.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000501655
Imagem não selecionada

Imprime registro no formato completo
Brazil nuts: determination of natural elements and aflatoxin Acta Amazonica
Martins,Maristela; Pacheco,Ariane Mendonça; Lucas,Ana Cyra Santos; Andrello,Avacir Casanova; Appoloni,Carlos Roberto; Xavier,Jose Junior Mendonça.
A study was carried out to evaluate the association of levels of radioactivity, selenium and aflatoxin in shelled Brazil nuts, which were classified in different sizes, for export. The selenium determinations were performed by inductively coupled plasma optical emission spectrometry (LOQ = 3.0 µg g-1), and aflatoxins were detected by Liquid chromatography-mass spectrometry (LOQ = 0.85 µg kg-1), recovery rates were between 92 and 100%. Radioactivity was measured by high-resolution gamma spectrometry. The selenium mean concentration was (22.7 ± 7.4) µg g-1. (n = 30). Mean activities determined for the following radium isotopes were: 15.77 Bq kg-1 for 224Ra, 104.8 Bq kg-1 for 226Ra and 99.48 Bq kg-1 for 228Ra. For 226Ra, the levels did not vary significantly...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Radioactivity; Selenium; Bertholletia excelsa.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672012000100018
Imagem não selecionada

Imprime registro no formato completo
Carcass characteristics and meat evaluation of Nelore cattle subjected to different antioxidant treatments R. Bras. Zootec.
Carmo,Thiago de Jesus do; Peripolli,Vanessa; Costa Jr,João Batista Gonçalves; Tanure,Candice Bergmann; Fioravanti,Maria Clorinda Soares; Restle,João; Kindlein,Liris; McManus,Concepta.
ABSTRACT Forty Nelore cattle were used to evaluate the effects of supplementation with different antioxidants on carcass characteristics and meat quality of feedlot cattle. Animals were fed Brachiaria brizantha hay and subjected to five treatments (control and four antioxidants: zinc, selenium, vitamin E, and selenium + vitamin E). After a 105-day feeding period, cattle were slaughtered. Tissue composition, as well as carcass proximate composition, color, tenderness, pH, and fatty acid profile were evaluated. Analysis of variance was carried out and means compared by Tukey test at 0.05 probability. The group fed selenium showed the lowest muscle amount (66.61 g/100 g) compared with the other antioxidants evaluated. There was no difference among treatments...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fatty acid; Saponin; Selenium; Vitamin E; Zinc.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200138
Imagem não selecionada

Imprime registro no formato completo
Chapter E: Selenium mobility in soils and its absorption, translocation, and metabolism in plants NWISRL
Mayland, H.F.; Gough, L.P.; Stewart, K.C..
Tipo: Conference or Workshop Item Palavras-chave: Selenium; Mass Import - autoclassified (may be erroneous).
Ano: 1991 URL: http://eprints.nwisrl.ars.usda.gov/909/1/744.pdf
Imagem não selecionada

Imprime registro no formato completo
Chapter I: Selenium in soils and plants from native and irrigated lands at the Kendrick Reclamation Project Area, Wyoming NWISRL
Erdman, J.A.; Severson, R.C.; Crock, J.G.; Harms, T.F.; Mayland, H.F..
Tipo: Conference or Workshop Item Palavras-chave: Selenium; Mass Import - autoclassified (may be erroneous).
Ano: 1991 URL: http://eprints.nwisrl.ars.usda.gov/907/1/742.pdf
Imagem não selecionada

Imprime registro no formato completo
Characterization and Metal Detoxification Potential of Moderately Thermophilic Bacillus cereus from Geothermal Springs of Himalaya BABT
Ghalib,Aslam Khan; Yasin,Muhammad; Faisal,Muhammad.
Two thermophilic Bacillus cereus strains (B. cereus-TA2 and B. cereus-TA4) used in the present study were isolated from the geothermal spring of Hunza valley, Gilgit, Pakistan. They showed the ability to withstand and grow at high temperature (85°C). Both these strains could resist multiple metals (copper, cadmium, mercury, manganese, zinc, arsenic, chromium and selenium). Strain B. cereus-TA4 reduced Cr (VI) at pH 5.0 to 9.0 but maximum reduction (83%) was observed at pH 7.0 after 48 h when initially supplied with 200 µg mL-1of K2CrO4. Lower initial concentrations such as 100 µg mL-1 supported higher reduction (90 to 95%) than that of high concentration such as 500 µg mL-1 (20 to 30%). Both the strains reduced nearly 70% of Se (IV) after 48 h of growth at...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromium; Bioremediation; Selenium; Heavy metals.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000400554
Imagem não selecionada

Imprime registro no formato completo
Chemical profile, agaritine and selenium content of Agaricus bisporus BABT
Mohamed,Eman Mostafa.
Chemical profile of the Agaricus bisporus samples were analyzed using GC/MS method in ethanolic extracts. A total of 174 metabolic products were detected, which included 13 significant metabolites between 1.2 to 83 % (w/w); other 13 metabolites at 1% (w/w) and 148 metabolites less than 1% classified into 12 categories. These metabolites had many medicinal activities, which included anti-cancer, anti-cardiovascular diseases, anti-hypercholesterol, anti-microbial, hepatoprotective, human health supporting and immune enhancer. HPLC analysis of water extracts of the A. bisporus samples showed that the spores and gills in the fresh adult mushroom had higher percentage of agaritine mycotoxin than the other parts. These contents were decreased by different...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agaricus bisporus; Chemical profile; Agaritine; Selenium; Anticancer; Antihypercholesterol; Aroma compounds; Galvanometric; GC/MS and HPLC.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000600015
Imagem não selecionada

Imprime registro no formato completo
Comportamento termorregulador de cabras Saanen criadas em ambiente tropical suplementadas com selênio orgânico. Repositório Alice
BOMFIM, J. M.; MARTINS, T. P.; PINHEIRO, R. R.; FAÇANHA, D. A. E.; SILVEIRA, R. M. F.; OLIVEIRA, M. C. de; SOUZA, V. de; VASCONCELOS, A. M. de..
Resumo: Objetivou-se, avaliar o comportamento termorregulador de cabras Saanen suplementadas com selênio orgânico na dieta e criadas em ambiente tropical. Foram utilizadas 12 cabras, não prenhes e clinicamente saudáveis; criadas de forma semiextensiva, pela manhã ficavam em pasto nativo e à tarde retornavam para o galpão, permanecendo em baias individuais e recebia concentrado à base de milho e farelo de soja, 250g/animal. Durante 21 dias foram suplementadas com selênio orgânico oferecido na forma de levedura, adicionado ao concentrado de acordo com as recomendações da empresa fornecedora. Foram realizadas aferições a Temperatura Retal, Frequência Respiratória, Temperatura Superficial da pele, nos turnos da manhã e tarde. Os dados meteorológicos foram...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Raça Saanen; Semiárido; Brasil; Nordeste; Caprino; Cabra leiteira; Termorregulação; Nutrição animal; Suplemento alimentar; Suplemento mineral; Microelemento; Selênio; Antioxidade; Goats; Thermoregulation; Supplementary feeding; Mineral supplements; Trace elements; Selenium; Antioxidants; Semiarid zones; Brazil.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1059793
Imagem não selecionada

Imprime registro no formato completo
Co-operative effect of glutathione depletion and selenium induced oxidative stress on API and NFkB expression in testicular cells in vitro: insights to regulation of spermatogenesis Biol. Res.
SHALINI,SONIA; BANSAL,MOHINDER P.
Previous studies have shown that transcription factors, API and NFkB exert important roles in the process by which selenium regulates spermatogenesis. Glutathione, an intracellular thiol, acts as a source of reducing power and aids in maintenance of the cellular redox status. The activities of selenium are closely related to the availability of glutathione. Presently, mouse testicular cells were cultured in the presence of BSO, a known glutathione depletor, to generate oxidative stress. Selenium (Se) was added as sodium selenite to these cells at concentrations of 0.5 µM and 1.5 µM. It was observed that at 1.5 µM, Se acted as a pro-oxidant and significantly decreased the redox ratio. RT PCR analysis revealed that cjun, cfos expression increased in...
Tipo: Journal article Palavras-chave: API; BSO; GSH; NFkB; Oxidative stress; Selenium; Testicular cells.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000400005
Imagem não selecionada

Imprime registro no formato completo
Determination of selenium in bovine semen by ICP-MS using formic acid for sample preparation. Repositório Alice
BIANCHI, S. R.; AMARAL, C. D. B. do; SILVA, C. S. da; NOGUEIRA, A. R. de A..
Determination of Se by inductively coupled plasma mass spectrometry (ICP-MS) can be difficult due to spectral interferences; however, these interferences can be eliminated by using collision-reaction interface (CRI) technology. A simple and fast procedure for determination of total Se concentration in bovine semen by ICP-MS after sample solubilization with diluted formic acid is here proposed. Formic acid caused an increase of up to 50% in selenium net signals and the maximum gain was obtained at 10% v v-1 formic acid solution. The optimized nebulizer gas flow rates were 1.05 and 0.95 L min-1, and radio frequency applied power were 1.3 and 1.4 kW without and with CRI, respectively. Microwave-assisted acid digestion was also implemented in the preparation...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Bovine semen; Cattle fertility; Selenium.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1079670
Imagem não selecionada

Imprime registro no formato completo
Determination of selenium toxicity to Oreochromis niloticus based on hematological parameters - doi: 10.4025/actascibiolsci.v34i2.8755 Biological Sciences
Seriani, Robson; Instituto de Pesca-SP - IP/SAA.; Ranzani-Paiva, Maria José Tavares; Instituto de Pesca-SP - IP/SAA.; Gonçalves, Adriano; Centro de Aquicultura, Universidade Estadual Paulista “Júlio de Mesquita Filho"; Siqueira, Silmara Regina; Instituto de Pesca-SP - IP/SAA.; Lombardi, Julio Vicente; Instituto de Pesca-SP - IP/SAA..
Selenium (Se) is described as an essential micronutrient and participates in different biological functions, as the antioxidant defense systems maintenance and regulation. However, when in high concentrations, Se may cause toxic effects as well as hematological changes in fish. The aim of the present study was to determine the toxicity of selenium in the form of sodium selenate (Na2Se6+O4) in Oreochromis niloticus based on hematological parameters, after exposure to different concentrations (0.01, 0.14 and 1.4 mg Se6+ L-1). The erythrocytic and leukocytic series were examined over 14 days at intervals of 0, 3, 5, 7,10 and 14 days. The erythrocytic series showed significant alterations in the first 7 days, including the control group. Neutrophils and...
Palavras-chave: 2.07.01.00-4 haematological; Water pollution; Selenium; Toxicity Fisiologia.
Ano: 2012 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/8755
Imagem não selecionada

Imprime registro no formato completo
Development and application of a selenium speciation method in cattle feed and beef samples using HPLC-ICP-MS: evaluating the selenium metabolic process in cattle. Repositório Alice
OLIVEIRA, A. F.; LANDERO, J.; KUBACHKA, K.; NOGUEIRA, A. R. de A.; ZANETTI, M. A.; CARUSO, J..
2016
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Selenio enriquecido; Levedura; Oléo de canola; Vitamina E; Alimentação de gado; Espécies de selenio; Selenio; Selenium.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1051423
Imagem não selecionada

Imprime registro no formato completo
Distribution of selenium in sheep treated with dipheny diselenide Arq. Bras. Med. Vet. Zootec.
Leal,M.L.R.; Rocha,J.B.T.; Corte,C.L.D.; Aires,A.R.; Rocha,J.F.X.; Zanatta,R.S.; Carpes,J.L.S.; Szinwelski,G.A.; Stefanello,S.; Pivoto,F.L..
ABSTRACT The aim of the present study was to report the in vivo distribution of selenium in sheep. For this, animals were allocated into two groups (control group and treated group) and kept in metabolic cages for a period of 37 days. The treated group received a single dose (6µmol/kg) of Diphenyl Diselenide, intravenously. Plasma and erythrocytes samples were collected at different times. Adipose tissue, muscles (latissimusdorsi, semitendinosus, and supra-scapular) heart, liver, lung, kidney, intestine and brain were sampled at 30 days post-treatment, in order to determine the selenium concentration. The results demonstrated that the selenium, from the Diphenyl Diselenide group, was higher in erythrocytes (4.8mg/L, six hours post-treatment) when compared...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant; Ovine; Selenium; Tissue.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000401017
Imagem não selecionada

Imprime registro no formato completo
Efeito de modificadores químicos sobre o comportamento eletrotérmico de selênio em digerido de material vegetal. Repositório Alice
ROSA, C. R.; GOMES NETO, J. A.; NOBREGA, J. A.; NOGUEIRA, A. R. de A..
A demanda crescente por alimentação balanceada tem despertado interesse em dietas diferenciadas baseadas em alimentos funcionais, os quais possuem propriedades ou substancias bioativas capazes de modular alguma função no organismo. As crucíferas, vegetais com capacidade de absorver altos teores de Se, compõem um grupo de uma série de alimentos desse tipo. A determinação de Se nesses vegetais é de interesse em função tanto de sua importância no metabolismo humano e animal como do ponto de vista de sua toxicidade. Com relação a determinação de Se por espectrometria de absorção atômica com atomização eletrotérmica em forno de grafite (GFAAS), os modificadores químicos convencionais mais citados são: Pd(NO3)2, Mg(NO3)2, Ni(NO3)2, Pd(NO3)2 + Mg(NO3)2,- Pd(NO3)2...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Selenio; Modificadores quimicos; GFAAS; Selenium.
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/handle/doc/44621
Imagem não selecionada

Imprime registro no formato completo
Effect of different sources of selenium on performance and characteristics of immune system of broiler chickens R. Bras. Zootec.
Shabani,Roozbeh; Fakhraei,Jafar; Yarahmadi,Hossein Mansoori; Seidavi,Alireza.
ABSTRACT An experiment was conducted based on a completely randomized design with 500 Ross 308 broiler chickens to investigate the effect of three different sources of selenium on performance and characteristics of immune system. Chickens were arranged in 10 treatments and five repetitions (10 chickens for each repetition). Ten treatments of experimental diet were considered in the study, including a basal diet (control); 0.5, 0.8, and 1.2 mg nano-selenium + basal diet (three treatments); 0.5, 0.8, 1.2 mg selenomethionine + basal diet; and 65, 80, and 100 mg vitamin E + selenium + basal diet. Findings suggested that adding selenomethionine (1.2 mg) to the basal diet resulted in a significant effect on feed conversion ratio and weight of broilers. In fact,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler; Immune response; Immunoglobin; Selenium.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100535
Imagem não selecionada

Imprime registro no formato completo
Effect of protein, carbohydrate, lipid, and selenium levels on the performance, carcass yield, and blood changes in broilers Rev. Bras. Ciênc. Avic.
Hada,FH; Malheiros,RD; Silva,JDT; Marques,RH; Gravena,RA; Silva,VK; Moraes,VMB.
The objective of this study was to evaluate the performance, carcass and parts yield, and blood changes in broilers fed different protein, carbohydrate, and lipid levels. Birds were fed a commercial diet until seven days of age. On day 8, birds were distributed according to a completely randomized experimental design in a 4 x 2 factorial arrangement (control diet, low protein diet, low carbohydrate diet or low lipid diet vs. supplementation of 0 or 0.3ppm organic selenium) with four replicates of 15 birds each. Broilers fed low protein presented lower body weight, feed intake, and worse feed conversion ratio on day 42, as well as lower carcass and breast yields, higher leg and abdominal fat yields, higher triglyceride and lower uric acid blood levels....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carbohydrates; Lipids; Blood parameters; Protein; Selenium.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000400014
Imagem não selecionada

Imprime registro no formato completo
EFFECT OF SELENITE ON THE TOTAL POLYPHENOL CONTENT AND ANTIOXIDATIVE ACTIVITY OF AQUEOUS AND ETHANOLIC EXTRACTS IN SPROUTS OF FOUR AGRONOMIC SPECIES R.C. Suelo Nutr. Veg.
Motomura,Yoshie; Reyes-Díaz,Marjorie; Mora Gil,Maria de la Luz.
Sprouts from some agricultural plants grown under dark conditions are known to contain some functional food ingredients. Recently, great attention has been paid to foods with natural antioxidative ingredients for human health and animal feed. Among the functional food compounds, phenolics and polyphenols are the most desirable food bioactives due to their antioxidative activity. The aim of this study was to determine the differences between aqueous and ethanohc extracts and the effect of selenite on the polyphenol content, and whether the antioxidative activity of selenite-treated sprouts growing in Petri dishes is enhanced compared to non-treated ones. The total polyphenol content in aqueous extract and ethanolic extract increased significantly in wheat...
Tipo: Journal article Palavras-chave: Antioxidative activity; Crop seedling; Ethanohc extract; Polyphenol; Selenium.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912008000100005
Imagem não selecionada

Imprime registro no formato completo
Effect of selenium treated broccoli on herbivory and oviposition preferencesof Delia radicum and Phyllotreta spp. Repositório Alice
MECHORA, S.; TORRES, D. P.; BRUNS, R. E.; SKOF, M.; UGRINOVIC, K..
bitstream/item/174009/1/Daiane-SciHorti-2017-Se-broccoli-GF-AAS.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Selenium; Broccoli; Photochemical; Efficiency Pest damage; Phyllotreta spp Delia radicum.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1089237
Imagem não selecionada

Imprime registro no formato completo
Effect of selenium-vitamin E injection in selenium-deficient dairy goats and kids on the Mexican plateau Arq. Bras. Med. Vet. Zootec.
Ramírez-Bribiesca,J.E.; Tórtora,J.L.; Huerta,M.; Hernández,L.M.; López,R.; Crosby,M.M..
Three experiments were carried out to determine the optimum selenium-vitamin E injection level to maintain acceptable blood selenium (Se) status of does and kids, as well as to determine the relation of that status to mortality rates in kids. In experiment 1, 238 goats were assigned to one of three groups during the mating period: A1-control, A2- 0.06mgSe+0.8IU vitE/kgBW and A3-0.125mgSe+1.7IU vitE/kgBW. No differences (P>.05) for fertility and prolificacy were observed among the groups. Blood Se concentration did not differ among Se-vit E groups and control group before injection, and both groups showed Se deficient condition. There was a trend (P<.05, 32%) to increase Se blood level 60 days post-treatment, but difference was not observed between A2...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Goat; Selenium; Vitamin E; México.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000100011
Imagem não selecionada

Imprime registro no formato completo
Effect of the supplementation of vitamins and organic minerals on the performance of broilers under heat stress Rev. Bras. Ciênc. Avic.
Laganá,C; Ribeiro,AML; Kessler,AM; Kratz,LR; Pinheiro,CC.
The objective of this experiment was to evaluate the effect of diet supplementation with vitamins C and E and organic minerals Zn and Se on the performance of 1 to 35 day-old broilers from, kept under cyclic heat stress (25 to 32ºC). Four levels of vitamin-mineral supplementation were used (T1-control diet (60/30 IU of vit E for starter and growing diet, respectively, zero vit. C, 80 ppm of inorganic Zn, 0.3 ppm of inorganic Se); T2-control diet + 100 UI vit E and 300 ppm vit C/kg; T3-control diet + 40 ppm Zn and 0,3 ppm Se/kg; T4-control diet + T2 and T3 levels) and two environments - thermoneutral and cyclic heat stress (TN and HS) from 14 to 35 days of age. In the period when part of the birds was submitted to HS, from 14 to 35 days, it was observed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ascorbic acid; Dl-alpha-tocopherol; Selenium; Thermal regulation; Zinc.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000100006
Registros recuperados: 61
Primeira ... 1234 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional