Ammonium Toxicity
Mostrando 1-12 de 54 artigos, teses e dissertações.
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1. Tratamento combinado de lixiviado de aterro sanitário e lodo de fossa séptica com emprego de geobag: estudo de laboratório e de campo
RESUMO Neste trabalho, são apresentados os resultados do desempenho de dois sistemas de tratamento combinado de lixiviado de aterros sanitários e lodos de fossas. Na escala de laboratório, empregou-se um geobag de pequenas dimensões e um filtro biológico de percolação a jusante dele. Na escala real, investigou-se o desempenho de uma unidade de tratame
Eng. Sanit. Ambient.. Publicado em: 20/12/2019
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2. The Response of Different Weed Species to Glyphosate Using Ammonium Sulfate and Hard Water
RESUMO: Há estudos prévios sobre o antagonismo da dureza da água e o efeito do sulfato de amônio na eficácia do glyphosate. No entanto, os autores desses estudos observaram resultados conflitantes entre espécies de plantas daninhas. Experimentos em estufa foram conduzidos em duplicata na Universidade Ferdowsi de Mashhad, em um delineamento de blocos co
Planta daninha. Publicado em: 10/06/2019
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3. Impact of Nitrate and Ammonium ratio on Nutrition and Growth of two Epiphytic Orchids
Abstract Phalaenopsis and Dendrobium do not grow and flower well with 100% ammonium (NH4-N); and there are detailed studies on the effects of nitrate (NO3-N) and ammonium ratios on the flowering, but no information about accumulation of other nutrients and the effects of ammonium toxicity on orchids. For this reason, two experiments were carried out with orc
An. Acad. Bras. Ciênc.. Publicado em: 18/10/2018
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4. A study of the metallic silver dissolution with the MEA-NH3-Cu system
ABSTRACT Leaching of silver from minerals has been studied for decades. Recently, research has been focused on the substitution of cyanide (because of its high toxicity) from hydrometallurgical operations. In this sense, the development of alternative-green leaching solutions for the recovery of metallic silver from minerals and urban mines is necessary. In
Matéria (Rio J.). Publicado em: 19/07/2018
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5. Synthesis, Surface Properties and Biological Activity of Long Chain Ammonium Herbicidal Ionic Liquids
Herbicidal ionic liquids exhibit many advantages compared to conventional chemical plant protection agents, which allow for a reduction of the herbicide dose per hectare and decrease of toxicity. Popular herbicides, such as 4-chloro-2-methylphenoxyacetic (MCPA) or 2,4-dichlorophenoxyacetic (2,4-D) acids, can be modified by reaction with long chain ammonium c
J. Braz. Chem. Soc.. Publicado em: 2016-10
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6. In vitro sensitivity of antagonistic Trichoderma atroviride to herbicides
Trichoderma atroviride was tested in vitro for its sensitivity to different herbicides. The dosages tested were recommended dosage (RD), half dosage (½RD), and double dosage (2RD). Germination, colony-forming units (CFU), radial growth, and spore production were evaluated. Carfentrazone-ethyl and sulfentrazone inhibited the germination at RD and 2RD. A redu
Braz. arch. biol. technol.. Publicado em: 2014-04
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7. Comparison of fibrin adhesives prepared by 3 different methods
INTRODUCTION: Fibrin tissue adhesive, which has applications in several areas of medicine, can be prepared by different methods. Aim: To compare fibrin tissue adhesives prepared by 3 different methods. METHOD: In this prospective experimental laboratory study, fibrin tissue adhesives prepared by the use of plasma fibrinogen (group 1), cryoprecipitation (grou
Int. Arch. Otorhinolaryngol.. Publicado em: 2013-03
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8. 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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9. The cytotoxicity of methacryloxylethyl cetyl ammonium chloride, a cationic antibacterial monomer, is related to oxidative stress and the intrinsic mitochondrial apoptotic pathway
Antibacterial monomers incorporated in dentin bonding systems may have toxic effects on the pulp. Thus, the cytotoxicity of antibacterial monomers and its underlying mechanisms must be elucidated to improve the safety of antibacterial monomer application. The influence of an antibacterial monomer, methacryloxylethyl cetyl ammonium chloride (DMAE-CB), on the
Brazilian Journal of Medical and Biological Research. Publicado em: 2011-11
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10. Efeitos do Aluminio, Nitrato e Amonio sobre a composicao de metabolitos nitrogenados e de carboidratos em Stylosanthes guianensis e S. Macrocephala.
Estudaram-se, em condicoes controladas, os efeitos da interacao de aluminio, nitrato e amonio, em solucao nutritiva, sobre os teores de compostos nitrogenados e de acucares em Stylosanthes guianensis e S. Macrocephala, sensivel e tolerante, respectivamente, tanto ao Al quanto ao amonio. A nutricao amoniacal causou o aparecimento de sintomas de toxidez de amo
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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11. Remediação de sedimentos eutróficos da Represa Ibirité (MG) pela adição de nitrato e Phoslock: experimentos em laboratório / Remediation of Eutrophic Sediments by the Addition of Nitrate and Phoslock: Laboratory experiments
Ibirité Reservoir (Ibirité/Sarzedo, MG) receives untreated effluents and raw sewage from the city of Ibirité and surroundings, which are the main cause of the eutrophication of this ecosystem. Past studies have shown that sediment is a significant internal source of nutrients (ammonium and orthophosphate ions) to the water column. Within this context, the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2010
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12. Lethal and sublethal effects of nitrogen pollution on anuran larvae / Efeitos letais e subletais da poluição por nitrogênio em larvas de anuros
As atividades humanas vêm aumentando dramaticamente a quantidade de nitrogênio inorgânico liberado nos ecossistemas, seja através da aplicação de fertilizantes na agricultura, da descarga de dejetos humanos e de seus rebanhos, ou da queima de combustíveis fósseis. Os excessos de nitrogênio são eventualmente transportados para corpos d´água, onde
Publicado em: 2010