Ammonium 15n
Mostrando 1-12 de 152 artigos, teses e dissertações.
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1. Synthesis of nano-alumina powder via recrystallization of ammonium alum
Resumo No presente estudo, um método de recristalização foi implementado para recuperar pó de alumina a partir de cristais de alúmen de amônio. O alúmen de amônio foi completamente dissolvido em água e tratado por ultrassonicação para evitar a aglomeração do cristal de alúmen. O precipitado branco foi seco a 150 °C por 6 h e as calcinações e
Cerâmica. Publicado em: 06/06/2019
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2. A Multicommuted Flow System for Spectrophotometric Determination of Formaldehyde in Mushroom
Formaldehyde is a carcinogenic compound that was employed as fungicide in the past. Despite its disuse, some foods such as mushrooms naturally produce formaldehyde, showing the importance of its determination. In this work, a mechanized flow system based on solenoid valves is proposed for spectrophotometric formaldehyde determination in mushrooms. The analyt
J. Braz. Chem. Soc.. Publicado em: 2018-07
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3. Controle de Espécies de Commelinas com Dessecantes Isolados e em Misturas
RESUMO: O objetivo deste trabalho foi avaliar o controle químico das espécies Commelina benghalensis e C. erecta com dessecantes isolados e em misturas, bem como o espalhamento das gotas de pulverização nas superfícies da folha. O delineamento experimental foi o inteiramente casualizado, no esquema fatorial 2 x 16, com quatro repetições, totalizando 3
Planta daninha. Publicado em: 07/12/2017
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4. Effects of ensiling density on nutritive value of maize and sorghum silages
ABSTRACT Studies were conducted to determine the effects of different ensiling densities on fermentation, aerobic stability, and nutritive value of maize and sorghum silages. Maize and sorghum were harvested at dough (363 g/kg) and milk stages (275 g/kg), respectively. Herbages were chopped approximately 1.5 cm after harvest and then ensiled in mini silos at
R. Bras. Zootec.. Publicado em: 2016-10
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5. Root extracts of Bracchiaria humidicola andSaccharum spontaneum to increase N use by sugarcane
ABSTRACT Retaining the mineral N in the form of NH4+ in the soil for a lengthy period is desirable for reducing losses. Furthermore, there is evidence that sugarcane prefers NH4+-N in place of NO3−-N. This study aimed firstly, to evaluate the potential of root extracts of Bracchiaria humidicola andSaccharum spontaneum, in contrast with the DCD (Dicyandiami
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-02
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6. GROWTH AND COMPOSITION OF Arthrospira (Spirulina) platensis IN A TUBULAR PHOTOBIOREACTOR USING AMMONIUM NITRATE AS THE NITROGEN SOURCE IN A FED-BATCH PROCESS
AbstractNH4NO3 simultaneously provides a readily assimilable nitrogen source (ammonia) and a reserve of nitrogen (nitrate), allowing for an increase in Arthrospira platensis biomass production while reducing the cost of the cultivation medium. In this study, a 22plus star central composite experimental design combined with response surface methodology was em
Braz. J. Chem. Eng.. Publicado em: 2015-06
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7. Contribution of nitrogen from sugarcane harvest residues and urea for crop nutrition
Sugarcane (Saccharum spp.) harvested without burning provides a substantial amount of remains (trash) on soil profiles which can be decomposed and release nutrients contributing to reduce fertilizer needs. The contribution of nitrogen (N) from sugarcane plant residues and fertilizer in sugarcane nutrition was assessed. Plant cane treatments were micro plots
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-10
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8. Growth and productive responses of tropical grass Panicum maximum to nitrate and ammonium supply
This study was conducted to investigate growth response parameters and forage yield of Panicum maximum Jacq. plants supplied with nitrate (NO3-) and ammonium (NH4+) as N source in a nutrient solution. Six NO3- and NH4+ combinations were tested at the following proportions: 100-0, 85-15, 70-30, 55-45, 40-60 and 25-75%. Grass shoot (number of tillers and leave
R. Bras. Zootec.. Publicado em: 2013-09
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9. Purification of trypsin inhibitor from seeds of Cicer arietinum (L.) and its insecticidal potential against Helicoverpa armigera (Hübner)
Trypsin inhibitors (TI) have crucial functions in plant defense against pests, and recent studies reveal their diversity in stress response. Disease and herbivore infestations are harmful to plant growth, but the response of TI in Cicer arietinum (L.) in Central India has been less studied. In the present study, we partially characterized the TI from Cicer a
Theor. Exp. Plant Physiol.. Publicado em: 2013
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10. Preparation of ZnO film on p-Si and I-V characteristics of p-Si/n-ZnO
Zinc oxide (ZnO) thin films were deposited on p-silicon (Si) substrate from ammonium zincate bath following a chemical dipping technique called SILAR. Films in the thickness range 0.5-4.5 µm could be prepared by varying the number of dipping for a fixed concentration (0.125 M) of zincate bath and fixed pH (11.00-11.10). Higher values of dipping produced non
Mat. Res.. Publicado em: 02/11/2012
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11. Foliar nitrogen and changes in free amino acid composition of Solanum lycopersicum under cadmium toxicity: kinetics of 15NH4+
Glutamate metabolism and amino acid translocation were investigated in the control and cadmium stressed shoots of tomato (Solanum lycopersicum - 63/5 F1), using (15N) ammonium and (15N) glutamate tracers. Regardless of organ type, [15N] ammonium assimilation occurred via glutamine synthetase (EC 6.3.1.2), in the control and stressed plants, and it did not de
Braz. J. Plant Physiol.. Publicado em: 2012
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12. Efectividad del 3,4- dimetilpirazolfosfato (DMPP) en naranjo dulce en el noreste Argentino
The aim of this study was to evaluate the 3,4-dimethylpirazol phosphate (DMPP) effect on the efficiency of ammonium-N fertilization on sandy soil of Corrientes, Argentina. The experiment was carried out with sweet orange [Citrus sinensis (L.) Osbeck] 'Valencia late' grafted on Rangpur lime (Citrus limonia, Osbeck) rootstock under field conditions during thre
Revista Brasileira de Fruticultura. Publicado em: 2011-12