Ammonia N
Mostrando 1-12 de 513 artigos, teses e dissertações.
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1. Arsenic and Other Elements Determination in Seawater Using Coprecipitation and Standard Mode Inductively Coupled Plasma Mass Spectrometry
The present work aims the determination of As, Co, Cr, Cu, Mn and Pb in seawater samples using coprecipitation extraction procedure before standard mode inductively coupled plasma mass spectrometry (ICP-MS) (no collision/reaction cell). The coprecipitation procedure is based on the precipitation of Mg(OH)2 from the reaction of the Mg2+ ions (present into the
J. Braz. Chem. Soc.. Publicado em: 2021-01
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2. DINÂMICA MOLECULAR REATIVA DA ABERTURA DO ANEL EPÓXI EM REAÇÕES COM POLIAMINA Ellen
The molecular dynamics simulations were used to study the epoxy ring-opening in the determination of kinetic parameters, with a temperature range from 1500 to 2500 K in a 20 x 20 x 20 Å unit cell containing 15 molecules of C2H4O (ethylene oxide) and 35 molecules of CH6N2 (methanediamine). The activation energy values for epoxy and diamine was 66 and 92 kJ m
Quím. Nova. Publicado em: 2020-05
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3. Analysis of NH3-N Slow Release systems for fiber digestibility of low-quality forage: in vitro approach
ABSTRACT: Urea is a common non-protein supplement used in ruminant feed; however, excessive consumption may lead to poisoning by NH3. Although the slow release of urea into the rumen has shown to be an essential aspect for ruminant feed, to date only a few studies have addressed this matter. In this study we examined the influence of five different NH3-N slo
Sci. agric. (Piracicaba, Braz.). Publicado em: 20/12/2019
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4. Red clover silage: an alternative for mitigating the impact of nitrogen excretion in ovine production systems
ABSTRACT The objective was to quantify the flow of intestinal nutrients and nitrogen excretion and retention in sheep receiving isoproteic diets. Eight Texel x Lacaune wethers (average body weight = 25±2.5 kg) were fitted with duodenal cannula and housed in metabolic cages. Wethers were assigned to the treatments in a crossover design with two periods of 20
R. Bras. Zootec.. Publicado em: 25/11/2019
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5. Conversion of ammonium to nitrate and abundance of ammonium-oxidizing-microorganism in Tropical soils with nitrification inhibitor
ABSTRACT The use of nitrification inhibitors (NIs; dicyandiamide - DCD) is an alternative to reduce oxidation of ammonium (NH4+-N) to nitrate (NO3–-N) in the soil, reducing NO3–-N losses from fertilization practices. Based on the hypothesis that DCD reduces conversion of NH4+-N to NO3–-N in tropical soils and inhibits ammonia oxidizing microorganisms (
Sci. agric. (Piracicaba, Braz.). Publicado em: 04/11/2019
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6. Fermentation characteristics and in vitro ruminal digestion of yacon residue silage with lactic acid bacteria inoculant or beet pulp
ABSTRACT In this study, we examined the effects of lactic acid bacteria (LAB) inoculant and beet pulp (BP) on the quality of yacon (Smallanthus sonchifolius) residue silage. Yacon silage was prepared using a small-scale system of silage fermentation, and the treatments were as follows: control silage without any additive and silages with LAB inoculant Chikus
R. Bras. Zootec.. Publicado em: 28/10/2019
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7. Ammonia thiosulfate in Japanese plum tree thinning
Resumo O manejo da cultura da ameixeira apresenta grandes problemas no Brasil devido à falta de produtos químicos registrados para o uso na cultura. Com o objetivo de testar o emprego do Tiossulfato de amônio (ATS) no raleio químico da ameixa japonesa implantou-se e conduziu-se um experimento durante as safras de 2015/2016 e 2016/2017 em Ponta-Grossa, P
Rev. Bras. Frutic.. Publicado em: 10/10/2019
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8. Influência da compactação do solo sobre a produção e o potencial poluidor de lixiviados de resíduos sólidos urbanos
RESUMO No Brasil, a disposição final de resíduos sólidos urbanos (RSU) representa um risco ambiental em função da geração de lixiviados com altas cargas contaminantes, mesmo em aterros sanitários. Objetivou-se no presente estudo, em escala experimental, avaliar a influência de diferentes graus de compactação do solo (GC) nas camadas intermediári
Eng. Sanit. Ambient.. Publicado em: 09/09/2019
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9. Value of Functionalized Charcoal for Increasing the Efficiency of Urea N Uptake: Insights into the Functionalization Process and the Physicochemical Characteristics of Charcoal
ABSTRACT Functionalized charcoal (CHox) incorporated into urea is known for its ability to reduce NH3 volatilization and increase agronomic efficiency. However, it is important to optimize the functionalization process and to elucidate its relationship with the physicochemical properties of CHox for N supply. Thus, charcoal obtained from eucalyptus wood was
Rev. Bras. Ciênc. Solo. Publicado em: 15/08/2019
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10. Landfill leachate treatment using activated carbon obtained from coffee waste
RESUMO Foi realizada uma série de experimentos para estabelecer e avaliar o potencial de carvão ativado produzido de resíduos de café por meio de um processo de adsorção na depuração do lixiviado de aterro sanitário. Foram estudados diferentes reagentes para a ativação do carvão: HCl, HCl + H2O2, H3PO4, H3PO4 + H2O2, todos com taxa de impregnaç�
Eng. Sanit. Ambient.. Publicado em: 29/07/2019
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11. Use of urease inhibitors to reduce ammonia volatilization in Amazonian soils
Resumo: O objetivo deste trabalho foi avaliar inibidores de urease quanto à redução de perdas por volatilização de amônia proveniente da ureia, em solos da Amazônia. O experimento foi realizado em um Latossolo Amarelo de textura muito argilosa, em um Latossolo Vermelho de textura argilosa, e em um Plintossolo Argilúvico de textura franco-siltosa. Cad
Pesq. agropec. bras.. Publicado em: 04/07/2019
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12. Biodegradable oil-based polymeric coatings on urea fertilizer: N release kinetic transformations of urea in soil
ABSTRACT: Polymer coatings are used to control the rate of release of plant available nutrients from fertilizers as well as to reduce nutrient losses such as ammonia (NH3) volatilization. Although the literature presents several examples of materials used to coat urea, little is known about nitrogen (N) release properties such as the mechanism involved and p
Sci. agric. (Piracicaba, Braz.). Publicado em: 01/07/2019