Iron 57
Mostrando 1-12 de 135 artigos, teses e dissertações.
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1. Influence of the Local Structure on the Photocatalytic Properties of Zinc Spinel Ferrite Nanoparticles
The correlation between iron distribution in octahedral or tetrahedral sites in synthetic magnetite and zinc spinel ferrites and their catalytic properties were investigated in this work. The zinc-doped nanomagnetites were prepared by co-precipitation method and annealed at 420 °C. X-ray diffraction, UV-Vis, X-ray absorption and 57Fe Mössbauer spectroscopi
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Characterization and mechanical properties of one-part geopolymer based on a pure metakaolin
Abstract Geopolymers are amorphous silicate polymers that have been extensively studied due to their applications, scientific and technical relevance, and their potential as cement in substitution to Portland. Much of the focus has been in the use of precursors and aggregates that are rarely pure and homogeneous with the use of tailings being very common. Th
REM - International Engineering Journal. Publicado em: 2022
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3. Large strain consolidation analyses of fine tailings disposal in mining pits
Abstract Herein, three-dimensional analyses of large strain consolidation applied to tail ings disposal in mining pits is studied. The main goal is to estimate filling time and, ac cordingly, the capacity of the pit. Other useful results, such as dry density profiles and water pore pressure generation are also obtained. Two different slimes from the iron or
REM, Int. Eng. J.. Publicado em: 2020-09
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4. Preserve Planet EARTH. If not you, WHO? If not Now, WHEN?
Abstract Herein, three-dimensional analyses of large strain consolidation applied to tail ings disposal in mining pits is studied. The main goal is to estimate filling time and, ac cordingly, the capacity of the pit. Other useful results, such as dry density profiles and water pore pressure generation are also obtained. Two different slimes from the iron or
REM, Int. Eng. J.. Publicado em: 2020-09
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5. Genetic parameters and combined selection for phosphorus, phytate, iron, and zinc in Mesoamerican common bean lines
RESUMO O desenvolvimento de cultivares de feijão com concentração de minerais e de fitatos que atendam aos diferentes requerimentos nutricionais dos consumidores é uma nova estratégia dos programas de melhoramento. Os objetivos desse trabalho foram obter estimativas de parâmetros genéticos para a concentração de fósforo, fitatos, ferro e zinco em u
Ciênc. agrotec.. Publicado em: 03/06/2019
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6. Improvement in dietary intake estimates through the combined use of different approaches
RESUMO Objetivo Comparar estimativas de ingestão alimentar de Questionário de Frequência Alimentar em conjunto a duas abordagens: porções obtidas de Recordatórios-24h aplicados na população de estudo, e equações de calibração, calculadas a partir dos mesmos Recordatórios-24h. Métodos Foram descritas medianas e intervalos de confiança de ener
Rev. Nutr.. Publicado em: 03/06/2019
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7. Promotion of iron nutrition and growth on peanut by Paenibacillus illinoisensis and Bacillus sp. strains in calcareous soil
ABSTRACT This study aimed to explore the effects of two siderophore-producing bacterial strains on iron absorption and plant growth of peanut in calcareous soil. Two siderophore-producing bacterial strains, namely, YZ29 and DZ13, isolated from the rhizosphere soil of peanut, were identified as Paenibacillus illinoisensis and Bacillus sp., respectively. In po
Braz. J. Microbiol.. Publicado em: 2017-12
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8. Fortifying pork liver mixture: preparation and physicochemical characteristics - Part 1
Abstract Micronutrient deficiency is a worldwide health problem, especially in developing countries. A survey conducted over the last decade has shown that approximately half of all Brazilian preschoolers have iron-deficiency anemia, representing a severe public health problem. Therefore, the aim of this research was to evaluate the physicochemical and micro
Food Sci. Technol. Publicado em: 20/07/2017
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9. A Mesoporous SiO2/γ-Fe2O3/KI Heterogeneous Magnetic Catalyst for the Green Synthesis of Biodiesel
A magnetic catalyst (sample MCat) consisting of KI supported on a mixture of silica and maghemite (γ-Fe2O3) was prepared and used in the transesterification reaction for the synthesis of biodiesel. The energy dispersive X-ray spectrum of the catalyst showed signals due to Si, Fe, K, and I. Powder X-ray diffraction data revealed the amorphous nature of the S
J. Braz. Chem. Soc.. Publicado em: 2016-12
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10. Bacterial strains from floodplain soils perform different plant-growth promoting processes and enhance cowpea growth
ABSTRACT Certain nodulating nitrogen-fixing bacteria in legumes and other nodule endophytes perform different plant-growth promoting processes. The objective of this study was to evaluate 26 bacterial strains isolated from cowpea nodules grown in floodplain soils in the Brazilian savannas, regarding performance of plant-growth promoting processes and ability
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-08
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11. Several techniques for the preparation of flour from carcasses of the Pantanal alligator (Caiman crocodilus yacare)
AbstractFlour prepared via current assay methodologies from the carcasses of the Pantanal alligator (Caiman crocodilus yacare) was analyzed for its chemical composition, minerals, fatty acids, and sensorial profile. Carcasses of the Pantanal alligator, originating from the Coocrijapan scientific zoo, Cáceres MT Brazil, were utilized. The carcasses were cook
Food Sci. Technol. Publicado em: 15/09/2015
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12. Evaluation of hemoglobin performance in the assessment of iron stores in feto-maternal pairs in a high-risk population: receiver operating characteristic curve analysis
Objective: By applying receiver operating characteristic curve analysis, the objective of this study was to see whether hemoglobin levels reflect body iron stores in a group of pregnant women at term who, by using serum ferritin as the reference test, had a high pre-test prob- ability of having iron deficiency anemia. Likewise, we evaluated the ability of h
Rev. Bras. Hematol. Hemoter.. Publicado em: 2015-06