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| Registros recuperados: 52 | |
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| 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 |
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| Khalili, Mohsen; Chamani, Mohammad; Amanlou, Hamid; Nikkhah, Ali; Sadeghi, Aliasghar; Dehkordi, Farhad Kamali; Rafiei, Mohammad; Shirani, Vahid. |
| The purpose of this study was to investigate the effects of four types of diets containing different forms of selenium on the hematological blood parameters, reproduction and health of dairy cattle during the transition period. Twenty-four close-up dry cows with a mean of 259 ± 1days of pregnancy and expected 21 ± 1days prior to parturition were selected. The cows were fed four diets: 1) basal diet without selenium supplementation (C); 2) basal diet plus 0.5ppm selenium in the form of sodium selenite (Se-S) 3) basal diet plus 0.5ppm selenium in the form of selenium yeast (Se-Y); 4) basal diet plus 0.5ppm selenium in the form of selenomethionine (Se-M). Blood samples for measuring hematological blood parameters (including lymphocyte, red blood cells,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Selenium; Hematological blood parameters; Reproduction; Health; Dairy cows.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/45371 |
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| 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... |
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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 |
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| Zahedi,Hossein; Shirani-Rad,A. Hossein; Tohidi-Moghadam,H. Reza. |
| To study the effects of zeolite and selenium (Se) application on production and physiological attributes of three canola (Brassica napus L.) cultivars under water stress, an experiment was conducted in two growing seasons (2006 and 2007), at Karaj, Iran. The experimental design was randomized complete blocks in factorial split plot with three replications, and three factors: 1) irrigation: complete and restricted at stem elongation stage; 2) zeolite: 0 and 10 t ha-1; 3) Se (as sodium selenate): 0, 15 and 30 g L-1. These treatments were randomized into Zarfam, Okapi and Sarigol canola cultivars. According to the results, Zarfam cultivar showed the lowest electrolyte leakage and the highest biological yield due to zeolite application and 30 g L-1 Se. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological yield; Brassica napus L.; Water stress; Cellular electrolyte leakage; Selenium; Zeolite. |
| Ano: 2012 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952012000500006 |
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| 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 |
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| Gil,S.; Hevia,S.; Dallorso,M.; Resnizky,S.. |
| A deficiência de selênio já foi identificada pela medição da atividade da enzima glutationa de peroxidase no sangue de animais (vacas) criados em certas regiões do Pampa Úmido, mais especificamente na cidade de Nueve de Julio (Buenos Aires - Argentina). Em trabalho anterior, a análise de ativação neutrônica confirmou esses baixos níveis de selênio em uma determinada fazenda de cria para gado de corte. Neste trabalho, foram analisados os níveis de selênio no solo, na forragem e no plasma dos animais do mesmo estabelecimento. A população analisada (n=60) apresentou níveis de selênio abaixo do normal (30,1 ± 4,6µg/ml). De maneira semelhante, a concentração de selênio da forragem consumida - matéria seca igual a 30% - proveniente de uma área de baixada do... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Selenium; Deficiency; Cows; Neutron activation analysis. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352004000200018 |
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| 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 |
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| 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 |
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| DHINGRA,SANJIV; BANSAL,MOHINDER P. |
| Type-1 5'-iodothyronine deiodinase (5'-DI) is responsible for conversion of T4 to T3. Selenium (Se) is an integral part of this enzyme. Keeping in view the strong association between atherosclerosis and hypothyroidism, the present study examined the behavior of 5'-DI in liver, aorta and thyroid during hypercholesterolemia following different Se status, i.e., Se deficiency (0.02ppm), adequate (0.2ppm) and excess dose (1ppm) in SD male rats. Animals were fed a control or high-cholesterol diet (2%) for 1 and 2 months. 5'-DI activity and mRNA expression was measured by RIA and RT-PCR respectively. In liver and aorta, 5'-DI expression significantly decreased with the Se-deficient and the high-cholesterol diet. The trend was opposite in thyroid, i.e., mRNA... |
| Tipo: Journal article |
Palavras-chave: Selenium; Hypercholesterolemia; 5'-DI; Cholesterol; RT-PCR. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000200013 |
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| 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 |
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| 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 |
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| Paolicchi,F.; Perea,J.; Cseh,S.; Morsella,C.. |
| To study the deficiency of minerals and its relationship with Paratuberculosis, blood, serum, and fecal samples were obtained from 75 adult bovines without clinical symptoms of the disease and from two bovines with clinical symptoms of the disease, from two beef herds with a previous history of Paratuberculosis in the Province of Buenos Aires, Argentina. Serum samples were processed by ELISA and feces were cultured in Herrolds medium. Copper, zinc and iron in serum were quantified by spectrophotometry and selenium was measured by the activity of glutathione peroxidase. We also determined copper, zinc, iron and molybdenum concentrations in pastures and the concentration of sulfate in water. Mycobacterium avium subsp paratuberculosis (Map) was isolated from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Paratuberculosis; Micronutrients; Selenium; Molybdenum; Copper. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000100022 |
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| Cichoski,Alexandre José; Rotta,Renata Bezerra; Scheuermann,Gerson; Cunha Junior,Anildo; Barin,Juliano Smanioto. |
| Due to the fact that previous studies on the enzymatic activity of Glutathione peroxidase (GSH-Px) diverge widely in their methodology and results, this study aimed to investigate the influence of different analytical conditions on GSH-Px activity in chicken thighs from broilers that were fed different diets with different sources and concentrations of selenium. GSH-Px activity was evaluated six hours after slaughter and 120 days after frozen storage at -18 ºC. The different analytical conditions included time of pre-incubation (0, 10 and 30 minutes), reaction medium, types of substrate (H2O2 (0.72 mM, 7.2 mM, and 72 mM) and Terc-butil hydroperoxide 15 mM), and different buffer concentrations (buffer 1, potassium phosphate 50 mM pH 7.0 + EDTA 1 mM +... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: GSH-Px; Meat chicken; Enzymatic activity; Selenium; Buffers; Substrate. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000400004 |
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| ALBUQUERQUE,Tatiane Mendonça Nogueira Carneiro de; RAMOS,Eduardo Mendes; MACHADO,Isabella Fiche da Matta; BORGES,Paula Caixeta; BOLLETA,Ana Gabriella; MARÇAL,Joanna Oliveira; CARVALHO,Fernanda Paul de; FARIA,Peter Bitencourt. |
| Abstract This study aimed evaluate the effects of the associated supplementation of: chromium more iron (CrFe), magnesium more selenium (MgSe) and the four minerals (CrFeMgSe) on the parameters related to the pork quality. Supplementation with MgSe reduced the ether extract of the meat and changed the fatty acids profile, increasing the poly-unsaturated, n-3, n-6, the polyunsaturated: saturated rate and the activity of the enzyme Thioesterase index, besides reducing the total number of saturated fatty acids and the Atherogenicity index. It promoted a reduction in a*, b* and C* indices and increased h* of the chilled meat stored. Over the storage days under refrigeration, there was linear drop for L* and a* and an increase to C*. The associated use of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chromium; Fatty acid; Iron; Magnesium; Selenium. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000300721 |
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| Kindlein,Giselle; Ribeiro,Andréa Machado Leal; Canal,Cláudio Wageck; Vieira,Maitê de Moraes. |
| The effects of vitamin E and selenium (Se) supplementation on the immunity of hens vaccinated against a mixture of six swine-pathogenic Escherichia coli (EC) and avian encephalomyelitis virus (AEV) were studied. Antibody production (AbP) was evaluated in ninety 49 to 57-week-old H&N Nick Chick hens fed diets containing 14IU Vitamin E kg-1 (basal diet), 27, 59, 111, or 111IU vitamin E kg-1 + 0.56ppm Se supplementation. At 51 wks of age, half of the hens were vaccinated against EC, and all birds were vaccinated against AEV. At 53-weeks of age, the birds received a second dose of EC vaccine. Blood samples were collected weekly and serum was analyzed by ELISA for anti-EC IgY and was expressed as optical density (OD). Vaccinated hens had higher serum OD... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avian encephalomyelitis; Escherichia coli; Immunoglobulin; Selenium; Vitamin E. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000500024 |
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| Registros recuperados: 52 | |
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