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| Registros recuperados: 68 | |
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| Abril,Adriana. |
| Se evaluó la eficiencia de prácticas de manejo de hábitat y microorganismos para degradar efluentes en una industria metalúrgica de Córdoba, Argentina. Para optimizar la actividad de organismos del agua, el suelo y la rizosfera de las plantas, se manejaron tres hábitats: acuático, de humedales y agrícola. Las prácticas fueron: introducción de vegetación palustre y terrestre, aireación del agua, laboreos, remoción de sedimentos e inoculación con bacterias seleccionadas. Se evaluaron los siguientes parámetros: pH y contenido de bacterias en el agua, y contenido de aceites, Cr y Zn en los sedimentos, suelo y napa freática. El pH registrado fue siempre muy elevado (entre 8.4 y 10.9), mientras que la cantidad de bacterias descomponedoras aumentó hasta valores... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cromo; Zinc; Aceites minerales; Bioremediación; Fitoremediación. |
| Ano: 2005 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2005000100002 |
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| Acosta García,Edgar; Carías,Diamela; Páez Valery,María; Naddaf,Gloria; Domínguez,Zury. |
| Las vitaminas (Vit.) C, E y A, junto al zinc (Zn++) y cobre (Cu++) colaboran en la prevención de las comorbilidades asociadas a la obesidad. El objetivo del trabajo fue evaluar las concentraciones séricas (Cs) de Vit. C, E y A, así como las del Zn++ y Cu++ en púberes con exceso de peso (EP) y resistencia a la insulina (RI). El estudio fue descriptivo, correlacional, de campo y transversal. Las variables se compararon entre los púberes normopeso (NP)/sin RI y quienes tenían EP (con y sin RI). Se emplearon las pruebas de Pearson y Spearman, test de Student, U de Mann-Whitney, Kruskal-Wallis y el estadístico Z. Los adolescentes con EP/RI presentaron Cs de Zn++ menores que aquellos con EP/sin RI, y que el grupo control (p=0,010), siendo probablemente la RI lo... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitaminas antioxidantes; Zinc; Cobre; Exceso de peso; Resistencia a la insulina; Adolescentes. |
| Ano: 2017 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0325-29572017000200005 |
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| Acosta García,Edgar; Galdona,Elissa; Barón,María Adela; Páez,María Concepción; Velásquez,Emma; Solano,Liseti. |
| Se estudiaron las concentraciones séricas de zinc (Zn) y cobre (Cu), y la relación zinc/cobre (Zn/Cu) en 82 niños aparentemente sanos de 4 a 14 años de la ciudad de Valencia, Venezuela. Las concentraciones de Zn y Cu se determinaron por espectrofotometría de absorción atómica y el estado nutricional con los índices Peso/Talla, Talla/Edad e Índice de Masa Corporal. Los resultados de Zn (μg/dL), Cu (μg/dL) y la relación Zn/Cu fueron expresados en media±desviación estándar: (84,2±15,9), (125,4±24,8) y (0,69±0,18) respectivamente, sin diferencia significativa entre niños y niñas. La concentración de Cu correlacionó significativamente con la edad, siendo más baja en los niños mayores. La hipozincemia fue de 15,9% siendo las niñas (18,6%) más... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zinc; Cobre; Relación Zn/Cu; Niños. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0325-29572010000100004 |
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| Araújo,Marcos Jácome de; Medeiros,Ariosvaldo Nunes de; Teixeira,Izabelle Auxiliadora Molina de Almeida; Costa,Roberto Germano; Marques,Carlo Aldrovandi Torreão; Resende,Kléber Tomás de; Melo,Gabriel Maurício Peruca de. |
| ABSTRACT A comparative slaughter trial was conducted to estimate the body composition and net requirements of Cu, Zn, Mn, Fe, and Co for growth of castrated Moxotó goat kids, with15.69±0.78 kg initial body weight (BW), grazing in the semiarid region of Brazil. The baseline group consisted of four randomly selected kids (15.37±0.30 kg BW). Thirty-two kids were randomly allocated into eight groups (considered as block), distributed among four levels of concentrate supplementation (0, 0.5, 1.0, and 1.5% BW). Animals in a group were slaughtered when the 1.5% BW treatment kids in the group reached approximately 25 kg BW. The trace element content (mg/kg of empty body weight) ranged from 23.68 to 27.81 mg Zn, 35.70 to 47.29 mg Fe, 0.86 to 1.09 mg Mn, 1.45 to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caatinga; Factorial method; Micro mineral; Zinc. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000300231 |
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| Azad,SK; Shariatmadari,F; Torshizi,MAK; Chiba,LI. |
| ABSTRACT This experiment was conducted to investigate the effect of feeding different concentrations and sources of zinc (Zn) on the growth performance, tissue mineral status, bone morphology and immunity responses in 0-4-week broiler chickens. Four hundred and forty 1-d-old broiler chickens were assigned randomly to 11 dietary treatments with 4 cages per treatment and 10 broiler chickens per cage in a completely randomized design. Dietary treatments were: corn-soybean meal basal diet (negative control), basal diet supplemented with 5 g yeast/kg (yeast), and basal diet supplemented with 20, 50, or 80 mg of added Zn/kg as ZnSO4, Zn-Met, or Zn-yeast in a 3 x 3 factorial arrangement of treatments. The results showed that broilers fed Zn supplemented diets had... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broiler chickens; Growth performance; Bone characteristic; Immunity; Zinc. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000200322 |
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| Cardoso,ALSP; Albuquerque,R; Tessari,ENC. |
| The humoral immune response of broilers fed diets supplemented with Zinc (Zn) (0, 40, and 400mg/kg) and vitamin E (0, 12, and 120mg/kg), separately or combined, was evaluated. A completely randomized design was used according to a 3x3 factorial arrangement, with nine treatments and four repetitions per treatment. Sexed birds (n=1440) were distributed in 36 boxes with 40 chicks each and reared until 41 days of age. Vaccination against Newcastle Disease (ND) was performed when birds were 14 days old. ELISA and HI tests were used to assess antibody levels before vaccination and at 28, 35 and 41 days of age. The results were analyzed using Proc Mixed from SAS. The interaction between the highest dietary levels of Zn and vitamin E resulted in higher antibody... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Broilers; Humoral Immunity; Newcastle Disease; Vitamin E; Zinc. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000200005 |
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| 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 |
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| Cattanêo,Alex Júnior; Stangarlin,José Renato; Bassegio,Doglas; Santos,Reginado Ferreira. |
| ABSTRACT Crambe has great potential for cultivation in tropical regions, but its biotic factors may be a limiting aspect for its production. Thus, we aimed in this study to assess the effect of pre‐sowing seed treatments on seedling emergence, root system, production components, and oil. The experiment was conducted during two years in Cascavel, Paraná, Brazil. The experimental design consisted of randomized blocks with six treatments, including a control treatment (no treatment), biological treatments (Trichoderma asperellum and Bacillus subtilis), and chemical treatments (glutamic acid, thiamethoxam and zinc), with four replications. Emergence and growth crambe, as well as production components and oil in the first year were higher due to the contrast in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacillus subtilis; Trichoderma asperellum; Thiamethoxam; Glutamic acid; Zinc. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000300292 |
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| Davaran-Hagh,Elnaz; Mirshekari,Bahram; Reza-Ardakani,Mohammad; Farahvash,Farhad; Rejali,Farhad. |
| Integrated nutrient management is a major agronomic practice which brings together all methods to support plants nutritional requirement. However, the interaction of these methods together is very complex and needs to be studied in different climatic conditions. So, the effect of nitrogen fertilizer and Azospirillum lipoferum inoculation on maize (Zea mays L.) growth, yield and nutrients uptake was determined in this study. The hypothesis was that the bacterial inoculation decreases the need for N fertilizer application without reducing plant yield. Therefore, we carried out a factorial experiment in a randomized complete block design with three replications. Nitrogen at 0, 25, 50, 75 and 100 % concentrations of the recommended dose, i.e. 150 kg N ha-1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofertilizer; Iron; Nitrogen; Phosphorus; Zinc. |
| Ano: 2015 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952015000800006 |
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| de Oliveira,F.S.; Viana,M.R.; Antoniolli,A.R.; Marchioro,M.. |
| We studied the effects of chronic intoxication with the heavy metals lead (Pb2+) and zinc (Zn2+) on memory formation in mice. Animals were intoxicated through drinking water during the pre- and postnatal periods and then tested in the step-through inhibitory avoidance memory task. Chronic postnatal intoxication with Pb2+ did not change the step-through latency values recorded during the 4 weeks of the test (ANOVA, P>0.05). In contrast, mice intoxicated during the prenatal period showed significantly reduced latency values when compared to the control group (day 1: q = 4.62, P<0.05; day 7: q = 4.42, P<0.05; day 14: q = 5.65, P<0.05; day 21: q = 3.96, P<0.05, and day 28: q = 6.09, P<0.05). Although chronic postnatal intoxication with Zn2+... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Lead; Zinc; Inhibitory avoidance; Memory. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000100014 |
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| DELGADO,RICARDO; VERGARA,CECILIA; WOLFF,DANIEL. |
| Based on indirect evidence, a role for synaptically released copper and zinc as modulators of neuronal activity has been proposed. To test this proposal directly, we studied the effect of copper, zinc, and other divalent cations on voltage-dependent currents in dissociated toad olfactory neurons and on their firing rate induced by small depolarizing currents. Divalent cations in the nanomolar range sped up the activation kinetics and increased the amplitude of the inward sodium current. In the micromolar range, they caused a dose dependent inhibition of the inward Na+ and Ca2+ currents (I Na and I Ca) and reduced de amplitude of the Ca2+-dependent K+ outward current (I Ca-K). On the other hand, the firing rate of olfactory neurons increased when exposed to... |
| Tipo: Journal article |
Palavras-chave: Copper; Zinc; Modulators; Channels; Neuronal excitability. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000100019 |
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| Deliberalli,Wanessa; Cansian,Rogério L.; Pereira,Albanin A. M.; Loureiro,Rafael C.; Hepp,Luiz U.; Restello,Rozane M.. |
| ABSTRACT Streams in urban areas are strongly impacted by the input of organic matter and metals, for instance copper (Cu) and zinc (Zn). These metals are essential for the aquatic biota, but when absorbed in excess they are toxic. In Chiro nomidae larvae, the deleterious effects of heavy metals can be ascertained by analyzing the morphological deformities of the larval mentum, a structure of the oral cavity. In this study, we evaluated I) the bioavailability of Cu and Zn in urban stream sediments and II) the relationship between Cu and Zn concentrations and the incidence of deformities in the mentum of Chironomus larvae. Chironomid flies were collected from four locations in two streams at an urban area in southern Brazil. They were identified and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomonitoring; Copper; Environmental quality; Mentum; Zinc. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100316 |
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| Felippini,Ana Luiza de Carvalho; Sala,Miguel Angel; Lopes,Ruberval Armando; Silva,Gilberto André e. |
| The purpose of this study was to evaluate the effects of zinc, during lactation, on the junctional epithelium and inserted gum of the first upper molar of rats. The study used one-day old male rats, divided into two groups: those whose mother had been treated with 300 mg zinc chloride (ZnCl2) in the drinker water (treated group), and those whose mothers did not receive ZnCl2 (control group). After 21 days, the rat pups were sacrificed. Using karyometrical techniques, the greater (D) and smaller (d) nuclear diameters of the different layers of the junctional and inserted gum epithelia were determined, and the mean geometric diameter, D/d ratio, perimeter, area, volume, volume/area ratio, eccentricity, shape coefficient, and the contour index were estimated.... |
| Tipo: Journal article |
Palavras-chave: Zinc; Lactation; Junctional epithelium; Inserted gum. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000100024 |
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| Registros recuperados: 68 | |
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