Atmospheric Deposition Of Nitrogen
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. MODELOS FOTOQUÍMICOS SIMPLES COMO FERRAMENTA PARA O GERENCIAMENTO DA QUALIDADE DO AR
Atmospheric processes in an urban scenario are very complex and depend on meteorological parameters, emission, transport and deposition processes and the chemical mechanism. Simple air quality models can be used to understand the main aspects of ozone formation and provide information to adopt pollution control strategies. In this work the detailed simulatio
Quím. Nova. Publicado em: 02/05/2019
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2. Bulk Atmospheric Deposition of Major Ions and Dissolved Organic Nitrogen in the Lower Course of a Tropical River Basin, Southern Bahia, Brazil
Major ionic constituents (Cl–, Na+, K+, Mg2+, Ca2+, NH4+, NO3–, SO42–) and dissolved organic nitrogen were determined, from September 2009 to January 2010, in bulk atmospheric deposition in the lower course of Cachoeira River, sou
J. Braz. Chem. Soc.. Publicado em: 2015-08
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3. ATIVIDADE DA ENZIMA REDUTASE DE NITRATO EM TRÊS ESPÉCIES DE CAMPOS FERRUGINOSOS (CANGA) RESPONDE A FERTILIZAÇÃO NITROGENADA
Human activities have increased considerably the input of nitrogen in soils of agricultural and natural systems, may cause profound changes in physiology, morphology and ecology of plants. In this context, the activity of nitrate reductase (NR) becomes an important tool for understanding plant responses to increased N availability in soils through atmospheri
Publicado em: 2009
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4. Características químicas da água de córregos do Distrito Federal sob diferentes usos e cobertura do solo
The Cerrado is the second largest Brazilian biome and location of the headwaters of three important hydrological basins in Brazil. In spite of the biological and ecological relevance of this biome, there is little information about how land use changes affect the chemistry of surface water, groundwater and streams. In order to evaluate the effects of these c
Publicado em: 2008
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5. Atmospheric deposition of key-elements through rain in dense ombrophylous forest in the Serra do Mar State Park / Deposição atmosférica de elementos-chave, através de chuva, em floresta ombrófila densa no parque estadual da serra do mar
Due its altitudinal amplitude, the Serra do Mar State Park (PESM), shelters a variety of physiognomies of the Dense Ombrophylous Forest, such physiognomies are distributed along the level quota in a standard way. This work aims to evaluate the contribution of the moist deposition through the rain, in the distribution of these physiognomies. In order do make
Publicado em: 2007
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6. Propriedades estruturais do nitreto de germanio amorfo hidrogenado : (a-GeNx:H)
In this work we report optical and structural properties of hydrogenated germanium nitrogen alloys (a-GeNx:H). These films were prepared by the rf-reactive sputtering technique, using a crystalline germanium target in Argon + Ammonia or Argon + Nitrogen + Hydrogen (or Deuterium) atmosphere. Its properties are strongly dependent on the deposition parameters.
Publicado em: 1994
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7. Reconstruction of the historical changes in mycorrhizal fungal communities under anthropogenic nitrogen deposition.
Archived soil samples (1937-1999) and historic air quality data from the Los Angeles Basin were used for reconstructing the record of change between atmospheric NO(x) loads, soil delta(15)N values and the diversity of arbuscular mycorrhizae (AM), which are ubiquitous plant-fungus mutualists that control plant community productivity. A tripling of atmospheric
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8. Additive effects of simulated climate changes, elevated CO2, and nitrogen deposition on grassland diversity
Biodiversity responses to ongoing climate and atmospheric changes will affect both ecosystem processes and the delivery of ecosystem goods and services. Combined effects of co-occurring global changes on diversity, however, are poorly understood. We examined plant diversity responses in a California annual grassland to manipulations of four global enviro
National Academy of Sciences.
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9. Nitrogen availability alters the expression of carnivory in the northern pitcher plant, Sarracenia purpurea
Atmospheric transport and deposition of nutrients, especially nitrogen, is a global environmental problem with well-documented consequences for ecosystem dynamics. However, monitoring nitrogen deposition is relatively expensive, monitoring stations are widely spaced, and estimates and predicted impacts of nitrogen deposition are currently derived from spatia
The National Academy of Sciences.
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10. Ammonia-oxidizing bacteria respond to multifactorial global change
Recent studies have demonstrated that multiple co-occurring global changes can alter the abundance, diversity, and productivity of plant communities. Belowground processes, often mediated by soil microorganisms, are central to the response of these communities to global change. Very little is known, however, about the effects of multiple global changes on mi
National Academy of Sciences.
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11. Autotrophic Ammonia-Oxidizing Bacteria Contribute Minimally to Nitrification in a Nitrogen-Impacted Forested Ecosystem
Deposition rates of atmospheric nitrogenous pollutants to forests in the San Bernardino Mountains range east of Los Angeles, California, are the highest reported in North America. Acidic soils from the west end of the range are N-saturated and have elevated rates of N-mineralization, nitrification, and nitrate leaching. We assessed the impact of this heavy n
American Society for Microbiology.