Minerals Uptake
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. NOVEL SUPERABSORBENT HYDROGEL COMPOSITE BASED ON POLY(ACRYLAMIDE-CO-ACRYLATE)/NONTRONITE: CHARACTERIZATION AND SWELLING PERFORMANCE
A novel superabsorbent hydrogel (SH) composite based on a poly(acrylamide-co-acrylate) matrix filled with nontronite (NONT), a Fe(III)-rich member of the smectite group of clay minerals, is described in this manuscript. A variety of techniques, including FTIR, XRD, TGA, and SEM/EDX, were utilized to characterize this original composite. Experimental data con
Quím. Nova. Publicado em: 2015-03
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2. Avaliação do hipoclorito de sódio na severidade da ferrugem asiática, do oídio e nas características químicas da soja
Soybean [Glycine max (L) Merril] is a crop with great world economic expression due to its nutritional content and multiple usages. Its constant cultivation has lead to the development of many diseases affecting yield and quality. Powdery mildew (Erysiphe diffusa (Cooke &Peck)) and asian soybean rust (Phakopsora pachyrhizi (Syd. &P. Syd)) are among the most
Publicado em: 2009
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3. Qualidade nutricional e tecnológica de grãos em genótipos de feijão
This study evaluated environmental effects on the nutritional quality of common bean grains and estimated the genetic variability in the technological grain quality of cultivars and lines adapted to the edaphoclimatical conditions of the state of Paraná. Two experiments were conducted, one with the carioca bean and the other with the black bean group, in th
Publicado em: 2008
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4. DISPONIBILIDADE DE POTÁSSIO AFETADA POR CULTIVOS EM SOLOS COM LONGO HISTÓRICO DE ADUBAÇÃO / POTASSIUM AVAILABILITY AFFECTED FOR SUCCESSIVE CULTIVATIONS IN SOILS WITH LONG THERM FERTILIZATION
In soils containing minerals with potassium in non-exchangeable forms, crops uptake a larger amount of this nutrient than that the chemical method can extract, making more difficult the establishment of availability classes and sufficiency levels for potassium. The aims of this study were: a) investigate crop response with potassic fertilization in an Ultiso
Publicado em: 2008
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5. Poliovirus Adsorption by 34 Minerals and Soils
The adsorption of radiolabeled infectious poliovirus type 2 by 34 well-defined soils and mineral substrates was analyzed in a synthetic freshwater medium containing 1 mM CaCl2 and 1.25 mM NaHCO3 at pH 7. In a model system, adsorption of poliovirus by Ottawa sand was rapid and reached equilibrium within 1 h at 4°C. Near saturation, the adsorption could be de
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6. Abiotic factors affecting the toxicity of lead to fungi.
The toxicity of lead (Pb) to fungi in pure culture was influenced by several abiotic factors: pH, inorganic anions, clay minerals, and particulate (humic acid) and soluble organic matter. The toxicity of Pb was potentiated under acidic conditions (pH 5 and 6), and phosphate or carbonate anions reduced the toxicity, apparently as a result of the formation of
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7. Contaminant bioavailability in soils, sediments, and aquatic environments
The aqueous concentrations of heavy metals in soils, sediments, and aquatic environments frequently are controlled by the dissolution and precipitation of discrete mineral phases. Contaminant uptake by organisms as well as contaminant transport in natural systems typically occurs through the solution phase. Thus, the thermodynamic solubility of contamin
The National Academy of Sciences.
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8. Influence of pH and electrolyte composition on adsorption of poliovirus by soils and minerals.
The pH and the nature an concentration of simple electrolytes influenced the interaction of poliovirus type 2 with three soils, a sand, and a clay mineral. In electrolytes above pH 9 the virus was not adsorbed extensively to the substrates, but below pH 7 almost all virus was bound. For each adsorbent there was a characteristic pH region of transition from s
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9. Propagation of Rhizopus javanicus Biosorbent
After propagation of Rhizopus javanicus in defined media containing glucose, urea, and mineral salts in deionized distilled water, the ability of the nonliving biomass to sequester cupric ion was assayed. Growth, uptake capacity (saturation uptake at >1 mM Cu2+ concentration in solution), and biosorptive yield (biomass concentration × uptake capacity) were
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10. Effects of Potassium Deficiency on the Photosynthesis and Respiration of Leaves of Sugar Beet 1
Sugar beet plants (Beta vulgaris L. var. F5855441) were germinated and cultured under standardized environmental conditions for 28 days. Potassium deficiency was then induced by withholding K from the culture solution. Changes in CO2 and water vapor exchange rates and surface temperatures of individual attached leaves were measured with time after K cut-off,
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11. Study of Candida ingens grown on the supernatant derived from the anaerobic fermentation of monogastric animal wastes.
A pellicle-forming yeast, identified as Candida ingens, was found to grow on substrates derived from the anerobic fermentation of monogastric animal wastes. The organism used volatile fatty acids C2 to C6 and ammonia nitrogen. It had a preferential uptake of the acids in increasing order of molecular weight, removing 90% of the total titratable volatile acid
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12. Iron-Dependent Production of Hydroxamate by Sodium-Dependent Azotobacter chroococcum
The sodium-dependent strain 184 of Azotobacter chroococcum was unable to grow significantly in iron-limited medium, but did produce iron-repressible outer membrane proteins. Siderophores were not produced under these conditions. Citric acid was excreted, but not in response to iron limitation. This strain, however, was able to grow in insoluble mineral iron