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Machinassiah: heavy metal, alienação e crítica na cultura de massa; Machinassiah: heavy metal, alienation and criticism in mass culture

Nakamura, Sandra
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 06/11/2009 PT
Relevância na Pesquisa
66.28%
A cultura de massa (midiática) tem sido tradicionalmente considerada pouco criativa, alienada e, portanto, menos relevante do que as formas artísticas clássicas e canônicas. Sua incapacidade de se relacionar com a sociedade de outro modo que não como produto disponível no mercado fariam dela mero sustento da lógica de consumo. Propomos no presente trabalho a observação desta forma de cultura a partir de uma outra perspectiva. Com base em teorias Pós-Coloniais, da Complexidade e do Letramento Crítico, mostramos que a alienação da cultura de massa não lhe é uma característica intrínseca, mas uma construção feita a partir de práticas sociais cotidianas. Sendo uma construção, a alienação pode ser desconstruída, e a cultura pode tornar-se crítica, política, socialmente interessada e interessante. Trabalhamos com esta hipótese analisando o heavy metal, tomado como manifestação cultural (de massa) tradicionalmente identificada com a rebeldia e a contestação cultural e social. Observamos diferentes estratégias de dissidência a que recorrem roqueiros e headbangers, constatando que rupturas mais profundas com o conformismo alienado emergem de sua participação crítica em sua cultura musical, na cultura de massa e na sociedade de consumo. A confirmação de tal constatação foi obtida pela análise (multimodal) de um caso...

Superfosfato triplo, lama vermelha e zeólitas para remediação de metais pesados em solo contaminado; Remediation of contaminated soil with heavy metal using triple superphosphate, red mud and zeolites

Oliveira, Mara Lucia Jacinto
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 04/02/2010 PT
Relevância na Pesquisa
66.29%
Devido à persistência de metais pesados em solos, a contaminação por estes elementos é considerada permanente resultando no impacto agravante da degradação das propriedades químicas e biológicas do solo. As técnicas de estabilização para remediação de solos contaminados com metais pesados têm se destacado como uma opção eficaz, além de resultar num custo/benefício mais acessível quando comparado aos métodos de descontaminação tradicionais. Quando associada à fitoestabilização, constitui uma das técnicas mais promissoras, pois além de promover a reabilitação da área impactada, diminui os riscos ambientais, na medida em que protege o solo da erosão hídrica e reduz a lixiviação dos contaminantes. O conhecimento da distribuição dos metais nas frações do solo é essencial à predição do comportamento geoquímico destes no ambiente e, permite ainda avaliar a eficiência dos procedimentos remediadores e sua longevidade. Cd, Pb, Cu, Ni e Zn são de grande interesse na regulamentação por agências governamentais, visto que em concentrações elevadas em águas, solos e ar representam riscos à saúde humana. Neste contexto, o presente trabalho avaliou o potencial de imobilização de superfosfato triplo...

Ceramic Crucible Corrosion by Heavy Metal Oxide Glasses, Part I: Phenomenological Study

Garcia dos Santos, Iêda Maria; Moreira, R. C M; De Souza, A. G.; Paskocimas, C. A.; Leite, E. R.; Varela, José Arana; Longo, Elson
Fonte: Universidade Estadual Paulista Publicador: Universidade Estadual Paulista
Tipo: Artigo de Revista Científica Formato: 198-205
ENG
Relevância na Pesquisa
66.18%
Heavy metal oxide (HMO) glasses have received special attention due to their optical, electrical and magnetic properties. The problem with these glasses is their corrosive nature. In this work, three ceramic crucibles (Al 2O 3, SnO 2 and ZrO 2) were tested in the melting of the system 40 PbO-35 BiO 1.5-25 GaO 1.5 (cation-%). After glass melting, crucibles were transversally cut and analyzed by scanning electronic microscopy (SEM), coupled to microanalysis by energy dispersive spectroscopy (EDS). Results indicated that zirconia crucibles presented the highest corrosion, probably due to its smallest grain size. Tin oxide crucibles presented a low corrosion with small penetration of the glass into the crucible. This way, these crucibles are an interesting alternative to melt corrosive glasses in instead of gold or platinum crucibles. It is important to emphasize the lower cost of tin oxide crucibles, compared to gold or platinum ones.

Propaganda, militarismo e suas relações com o Heavy Metal em um estudo de caso: o albúm The Glorious Burden da banda Iced Earth.

Rodrigues, Icles
Fonte: Universidade Federal de Santa Catarina Publicador: Universidade Federal de Santa Catarina
Tipo: Trabalho de Conclusão de Curso Formato: 127 páginas
PT_BR
Relevância na Pesquisa
66.24%
TCC (graduação)- Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas, História.; Após os ataques ao World Trade Center em 11 de setembro de 2001, a mídia estadunidense se alinhou rapidamente com a propaganda que o governo dos Estados Unidos desejava espalhar, buscando o apoio popular para viabilizar uma guerra, primeiro contra o Afeganistão e, depois, contra o Iraque, a “Guerra ao terror”. Diversos produtos da indústria do entretenimento – ou cultura da mídia – responderam ao panorama que se apresentava, dentre eles, estava a música. O heavy metal, gênero musical normalmente visto como contestador e/ou progressista, foi intensamente afetado pela propaganda militarista que predominou nos EUA a partir de 2001 e, principalmente, após 2002. Um caso específico emergiu: o álbum The Glorious Burden da banda estadunidense Iced Earth. Lançado em 2004, o mesmo faz uso da ‘história oficial’ dos Estados Unidos para tentar demonstrar valores patrióticos, mas a forma como ele foi desenvolvido permite diferentes interpretações, por conta da polissemia dos produtos da cultura da mídia. Através de hipóteses baseadas no material disponível para coleta, analisaremos como o álbum The Glorious Burden pode ser interpretado como alinhado à propaganda de guerra...

Heavy metal levels in analytical laboratories waste: a study for the implementation of a programme for the control and disposal of waste from microbiology and chemical analysis laboratories

Agyei, George
Fonte: Universidade do Algarve Publicador: Universidade do Algarve
Tipo: Dissertação de Mestrado
Publicado em //2012 ENG
Relevância na Pesquisa
66.19%
Dissertação de mest., Qualidade em Análises, Faculdade de Ciências e Tecnologia, Univ. do Algarve, 2012; Analytical Laboratories daily routine analyses leads to the generation of solid and liquid waste. Quality assurance and quality control procedures are employed in most of these laboratories to ensure that accurate results are obtained and the waste generated out of these analyses are properly stored for collection by waste treatment companies. The cost associated with waste treatment varies with the type of waste generated. Liquid waste are quantified or priced according to the volume of waste. Microbiology waste are inactivated and added to solid waste for collection and treatment but residues from Chemical Analysis Laboratories cannot be emptied down the drainage systems since it can contain some levels of heavy metals which can be dangerous to the environment or human. Therefore the objective of this thesis was to characterize some of these important heavy metals so that they can be treated and discarded by the laboratory staff leading to reduction in payment for their treatment by external companies. The research involved the determination of total heavy metal (Pb, Cu Zn, Cr, Cd, Ni, Fe, As, Hg, Al) levels in Microbiology (M) and Chemical (C ) samples using the Atomic Absorption Spectroscopy (AAS). Flame technique was used for the analysis of Cd...

Are heavy metal music bands-musicians, managers of their own music business?: a multiple case study: portuguese vs. Finnish bands

Baltazar, Lídia
Fonte: Universidade da Beira Interior Publicador: Universidade da Beira Interior
Tipo: Dissertação de Mestrado
Publicado em //2013 ENG
Relevância na Pesquisa
66.28%
The Music Industry is a very complex world that embraces different and broad segments needing of academic exploration. The big majority of studies and/or academic approaches to this unique business world have been focusing greatly on the record labels side but have failed to address the role of those who make the music – the musicians/artists. This is exactly what the present study aimed to understand: What is the role of the musicians in the music business? Aren’t they one of the key elements, essential players, within the whole industry, if not the most important elements ever? The industry of music includes a large number of creative and wise musicians/bands behind one of the most discriminated music genres in the music history - Heavy Metal Music. However, diverse studies have demonstrated that Heavy Metal is recognized as a music genre that generates profit, with an increasing legion of fans all over the world hence, also considered popular music. Therefore, the purpose of this study is to understand how Heavy Metal Music bands and musicians succeed and how they manage to conciliate artistic creativity and commercial demands. By making a multiple case study analysis within two different settings – Portugal versus Finland – it will be shown that Heavy Metal bands / musicians possess business skills that allow them to manage and conduct both the artistic and business activities of their music business. In some of the cases...

Geochronology and heavy metal flux to Guanabara bay, Rio de Janeiro state: a preliminary study

Baptista Neto,Jose A.; Peixoto,Tomas C.S.; Smith,Bernard J.; Mcalister,John J.; Patchineelam,Soraya M.; Patchineelam,Sambasiva R.; Fonseca,Estefan M.
Fonte: Academia Brasileira de Ciências Publicador: Academia Brasileira de Ciências
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/01/2013 EN
Relevância na Pesquisa
66.14%
Guanabara Bay, located in Rio de Janeiro state. It is surrounded by the second most important metropolitan area of the country. Over recent decades, land disturbance and urbanization in the surrounding area has significantly increased sediment input to the bay and had a negative effect on its overall environmental. This is especially related to high volumes of untreated sewage and industrial effluents. This study evaluates the history of this human impact through detailed examination of a sediment core taken from the northern portion of Guanabara Bay. A geochronology is established using 210Pb dating and related to organic carbon and heavy metal fluxes to the sediments. This gave a calculated net average sedimentation rate for the core of 0.67 cm.year-1. The organic carbon and heavy metals flux started to increase at the beginning of the last century and the highest values was observed in the top of the cores.

Oyster condition index in Crassostrea rhizophorae (Guilding, 1828) from a heavy-metal polluted coastal lagoon

Rebelo,M. F.; Amaral,M. C. R.; Pfeiffer,W. C.
Fonte: Instituto Internacional de Ecologia Publicador: Instituto Internacional de Ecologia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/05/2005 EN
Relevância na Pesquisa
66.17%
The condition index (CI) of oysters represents an ecophysiological approach to estimate meat quality and yield in cultured bivalve mollusks. In the present study, the CI of oysters from a heavy-metal polluted bay was analyzed with respect to Zn and Cd contamination in soft tissues, spawning, and polychaete infestation. The CI was calculated through a new technique based on molds made to measure the volume of oyster-shell internal cavities. The higher CI values (over 9 in the dry season) were probably related availability of suspended particles rich in organic matter in the bay, while the rapid reduction in the CI from one season to the next at some stations suggests the effect of spawning. Polychaete infestation was considered low (18.7%) and produced no clear CI effects. The Cd in the oyster tissue collected during the rainy season was weak, although still significantly correlated with the CI (r = -0.36; p < 0.05). All other comparisons of CI and metal concentrations demonstrated a non-significant correlation. The CI variations observed on the temporal and spatial scale were likely to have been caused by availability of organic matter and spawning, rather than spionid infestation or metal body burdens.

Ethopoiésis e Heavy Metal: Subjetivação e consumo na cena de Natal-RN

Messias, Jessica da Silveira
Fonte: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Ciências Sociais; Desenvolvimento Regional; Cultura e Representações Publicador: Universidade Federal do Rio Grande do Norte; BR; UFRN; Programa de Pós-Graduação em Ciências Sociais; Desenvolvimento Regional; Cultura e Representações
Tipo: Dissertação Formato: application/pdf
POR
Relevância na Pesquisa
66.4%
Our research intends to comprehend the configuration of the resistance (Foucault) as the stylization of life in the contemporary world, taking Heavy Metal as the specific object of study. We believe that Heavy Metal is an ethopoietical device which admits practices of freedom withstanding the reified moral habits since the beginning of the socialization. This is reflected, mainly, in the creation of new individual and communal ways to stylize the life. We also suggest an expansion of Foucault s concept of resistance, considering the idea of consumer society described by Zygmunt Bauman. Our hypothesis understands that the contact with the underground of Heavy Metal provides new ethical manners (Foucault), where the individual take the Heavy Metal as a way of life. At this point, the consumption becomes a key-word since the participation in the underground of Heavy Metal is a way of consumption out of the rules of marketing a practice of freedom, a way of particular existence , being different in both mode and duration; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior; Nossa pesquisa visa compreender a configuração da resistência (Foucault) enquanto estilização da vida na contemporaneidade, tendo o Heavy Metal enquanto objeto de estudo específico. Acreditamos que o Metal se configure em um dispositivo ethopoiético possibilitador de práticas de liberdade frente aos hábitos morais reificados desde os primórdios da socialização do sujeito. Isso se reflete...

Investigating the enzymatic pathways involved in the production of metal-sulfides by the cyanobacterium Synechococcus leopoliensis; a potential means of heavy metal detoxification.

Vlassov, Katya
Fonte: Quens University Publicador: Quens University
Tipo: Tese de Doutorado
EN
Relevância na Pesquisa
66.33%
The accumulation of heavy metals in the environment possesses a serious threat to human health and ecosystem functioning. Bioremediation is an emerging technology employing biological systems for applications including environmental metal detoxification. Synechococcus leopoliensis, a cyanobacterium, has been deemed a good candidate for heavy metal bioremediation systems. It has been recently suggested that S. leopoliensis’ bioremediation capacity may be attributed to its formation of insoluble metal-sulfides. Serine acetyltransferase (SAT), O-acetyl-serine (thiol) lyase (OAS-TL) and cysteine desulfhydrase are three enzymes involved in the provision of sulfide, and thus metal-binding potential. This study investigated the activity of the aforementioned enzymes in S. leopoliensis cultures inoculated with copper (Cu(II)), zinc (Zn(II)) and cadmium (Cd(II)). The effect of sulfur enhancement on S. leopoliensis’ remediation ability was also analyzed. Pretreatment with sulfate 10 days prior to metal exposure elicited the greatest improvement of the cyanobacterium’s detoxification ability in response to 2 μM Cu(II) and Cd(II) application. This is likely because of the increased thiol reservoir made readily available for metal-sulfide formation. A significant increase in acid-labile sulfide content following Cu(II)...

Geochemical indices allow estimation of heavy metal background concentration in soils

Hamon, R.; McLaughlin, M.; Gilkes, R.; Rate, A.; Zarcinas, B.; Robertson, A.; Cozens, G.; Radford, N.; Bettenay, L.
Fonte: Amer Geophysical Union Publicador: Amer Geophysical Union
Tipo: Artigo de Revista Científica
Publicado em //2004 EN
Relevância na Pesquisa
66.23%
Defining background concentrations for heavy metals in soils is essential for recognizing and managing soil pollution. However, background concentrations of metals in soils can vary naturally by several orders of magnitude. Moreover, many soils have also been subject to unquantifiable anthropogenic inputs of metals, in some cases, for centuries. Hence determination of heavy metal background concentrations in soils has to date been fraught with difficulty. Here we demonstrate that there are associations between the background heavy metal and Fe or Mn contents in soils which appear to be consistent for seven important heavy metals of environmental concern. The relationships are remarkably independent of both soil type and climatic setting. These observations provide the basis for a series of general equations from which it is proposed Southeast Asian including Australian, and possibly worldwide background concentrations for As, Cr, Co, Cu, Ni, Pb, and Zn in soils can be derived.; R. E. Hamon, M. J. McLaughlin, R. J. Gilkes, A. W. Rate, B. Zarcinas, A. Robertson, G. Cozens, N. Radford and L. Bettenay

BATCH AND BENCH-SCALE FIXED-BED COLUMN EVALUATIONS OF HEAVY METAL REMOVALS FROM AQUEOUS SOLUTIONS AND SYNTHETIC LANDFILL LEACHATE USING LOW-COST NATURAL ADSORBENTS

Li, Chenxi
Fonte: Quens University Publicador: Quens University
Tipo: Tese de Doutorado Formato: 5000314 bytes; application/pdf
EN; EN
Relevância na Pesquisa
66.18%
In this project, three separate experiments were conducted to assess heavy metal removal from metal aqueous solutions and synthetic landfill leachate by adsorption using low-cost natural adsorbents. Fundamental batch investigations indicated that the 4.0-4.75 mm crushed mollusk shells and the Sphagnum peat moss were the best adsorbents for cadmium and nickel removal, respectively. Peat moss was also found to have the highest adsorption capacities for manganese and cobalt adsorption. The adsorption capacities of the peat moss and crushed mollusk shells used as natural adsorbents for the adsorption of cadmium and nickel from binary aqueous solutions in fixed-bed columns under continuous flow conditions were investigated. The life expectancy of each adsorbent in the fixed-bed columns was also assessed for different hydraulic loading rates. The flow rate of 1.5 mL/min (surface loading of 27.52 cm3/cm2•day) and bed depth of 15 cm were identified as the better operational conditions from the column testing. The results indicated that 47.9% and 42.7% cadmium and nickel removal efficiencies could obtained under these operational conditions, respectively. Finally, the peat moss and the crushed mollusk shells were packed in bench-scale down-flow fixed-bed columns to evaluate their adsorption capacities as natural low-cost adsorbents for the removal of heavy metals from aerated and non-aerated synthetic landfill leachate. The flow rate applied in this operation was 1.5 mL/min (surface loading of 27.52 cm3/cm2•day). Peat was found to have the best adsorption capacities in columns treating aerated synthetic leachate for cadmium (78.6%) and nickel (83.8%) removal efficiencies.; Thesis (Master...

Are heavy metal music bands-musicians, managers of their own music business?: a multiple case study: portuguese vs. Finnish bands

Baltazar, Lídia
Fonte: Universidade da Beira Interior Publicador: Universidade da Beira Interior
Tipo: Dissertação de Mestrado
Publicado em //2013 ENG
Relevância na Pesquisa
66.28%
The Music Industry is a very complex world that embraces different and broad segments needing of academic exploration. The big majority of studies and/or academic approaches to this unique business world have been focusing greatly on the record labels side but have failed to address the role of those who make the music – the musicians/artists. This is exactly what the present study aimed to understand: What is the role of the musicians in the music business? Aren’t they one of the key elements, essential players, within the whole industry, if not the most important elements ever? The industry of music includes a large number of creative and wise musicians/bands behind one of the most discriminated music genres in the music history - Heavy Metal Music. However, diverse studies have demonstrated that Heavy Metal is recognized as a music genre that generates profit, with an increasing legion of fans all over the world hence, also considered popular music. Therefore, the purpose of this study is to understand how Heavy Metal Music bands and musicians succeed and how they manage to conciliate artistic creativity and commercial demands. By making a multiple case study analysis within two different settings – Portugal versus Finland – it will be shown that Heavy Metal bands / musicians possess business skills that allow them to manage and conduct both the artistic and business activities of their music business. In some of the cases...

Myriophyllum aquaticum as a biomonitor of water heavy metal input related to agricultural activities in the Xanaes River (Córdoba, Argentina)

Harguinteguy, Carlos Alfredo; Schreiber, Sebastian Rene; Pignata, Maria Luisa
Fonte: Elsevier Science Bv Publicador: Elsevier Science Bv
Tipo: info:eu-repo/semantics/article; info:ar-repo/semantics/artículo; info:eu-repo/semantics/publishedVersion Formato: application/pdf
ENG
Relevância na Pesquisa
66.28%
The aim of the present study was to assess the temporal variation of the heavy metal content (Co, Cu, Fe, Mn, Ni, Pb, and Zn) in surface water and sediments in relation to agricultural practices in the Xanaes River (Córdoba, Argentina). A second objective was to analyze possible relationships between the input of heavy metals on surface water and sediment, heavy metal accumulation and physiological changes in the aquatic plant Myriophyllum aquaticum. Samples were taken from the river at two contrasting sites (between April 2010 and August 2010): (1) a pristine area (mountain site), and (2) an area with intensive agricultural activity located at 60 km down river (agricultural site). The total concentration of heavy metals in surface water was higher in samples collected at the agricultural site but in sediments only the Mn concentration was higher than at the mountain site. The Fe and Mn concentrations in surface water at the agricultural site exceeded the recommended values for Argentinean Legislation of 300 g L−1 for Fe and 100 g L−1 for Mn. The accumulations of Zn and Mn in M. aquaticum were higher at the agricultural site and more elevated than the Zn and Mn concentrations in sediments at the same sites and sampling times. At the agricultural site...

Heavy metal resistant strains are widespread along Streptomyces phylogeny

Alvarez, Analia; Catalano, Santiago Andres; Amoroso, Maria Julia del R.
Fonte: Elsevier Publicador: Elsevier
Tipo: info:eu-repo/semantics/article; info:ar-repo/semantics/artículo; info:eu-repo/semantics/publishedVersion Formato: application/pdf
ENG
Relevância na Pesquisa
66.19%
The genus Streptomyces comprises a group of bacteria species with high economic importance. Several of these species are employed at industrial scale for the production of useful compounds. Other characteristic found in different strains within this genus is their capability to tolerate high level of substances toxic for humans, heavy metals among them. Although several studies have been conducted in different species of the genus in order to disentangle the mechanisms associated to heavy metal resistance, little is known about how they have evolved along Streptomyces phylogeny. In this study we built the largest Streptomyces phylogeny generated up to date comprising six genes, 113 species of Streptomyces and 27 outgroups. The parsimony-based phylogenetic analysis indicated that (i) Streptomyces is monophyletic and (ii) it appears as sister clade of a group formed by Kitasatospora and Streptacidiphilus species, both genera also monophyletic. Streptomyces strains resistant to heavy metals are not confined to a single lineage but widespread along Streptomyces phylogeny. Our result in combination with genomic, physiological and biochemical data suggest that the resistance to heavy metals originated several times and by different mechanisms in Streptomyces history.; Fil: Alvarez...

The effects of soil amendments on heavy metal bioavailability in two contaminated Mediterranean soils

Walker, David J.; Clemente Carrillo, Rafael; Roig, Asunción; Bernal Calderón, M. Pilar
Fonte: Elsevier Publicador: Elsevier
Tipo: Artículo Formato: 259768 bytes; application/pdf
ENG
Relevância na Pesquisa
66.25%
10 pages, 4 tables, 6 figures.; Two heavy metal contaminated calcareous soils from the Mediterranean region of Spain were studied. One soil, from the province of Murcia, was characterised by very high total levels of Pb (1572 mg kg−1) and Zn (2602 mg kg−1), whilst the second, from Valencia, had elevated concentrations of Cu (72 mg kg−1) and Pb (190 mg kg−1). The effects of two contrasting organic amendments (fresh manure and mature compost) and the chelate ethylenediaminetetraacetic acid (EDTA) on soil fractionation of Cu, Fe, Mn, Pb and Zn, their uptake by plants and plant growth were determined. For Murcia soil, Brassica juncea (L.) Czern. was grown first, followed by radish (Raphanus sativus L.). For Valencia soil, Beta maritima L. was followed by radish. Bioavailability of metals was expressed in terms of concentrations extractable with 0.1 M CaCl2 or diethylenetriaminepentaacetic acid (DTPA). In the Murcia soil, heavy metal bioavailability was decreased more greatly by manure than by the highly-humified compost. EDTA (2 mmol kg−1 soil) had only a limited effect on metal uptake by plants. The metal-solubilising effect of EDTA was shorter-lived in the less contaminated, more highly calcareous Valencia soil. When correlation coefficients were calculated for plant tissue and bioavailable metals...

Changes in Microbial Biomass Parameters of a Heavy Metal-Contaminated Calcareous Soil during a Field Remediation Experiment

Clemente Carrillo, Rafael; Fuente, C. de la; Moral, R.; Bernal Calderón, M. Pilar
Fonte: American Society of Agronomy Publicador: American Society of Agronomy
Tipo: Artículo Formato: 259768 bytes; application/pdf
ENG
Relevância na Pesquisa
66.18%
Soil microbial biomass parameters give useful information about the restoration degree and quality of contaminated soils. These parameters were studied in a field experiment where the effect of two organic amendments on the bioavailability of heavy metals in an agricultural soil and on their accumulation in Beta vulgaris and Beta maritima was assessed. The soil was a calcareous Xeric Torriorthent and the total metal levels were (mg kg–1): 2706 Zn, 3235 Pb, and 39 Cu. The treatments were: fresh cow manure, olive husk, and inorganic fertilizer as a control. Two successive crops (B. vulgaris and B. maritima) were grown on the treated and untreated plots. The soil was sampled before each planting and after each harvest over a 15-mo period. Biomass C and N increased in all plots, especially in the organically amended ones. The ratio CO2–C/biomass C decreased in olive husk and manure-treated plots, in comparison with the control, and also during the experiment, suggesting a beneficial effect of the organic amendments. In olive husk-treated plots a significant increase in the ratio of biomass C/total organic carbon (TOC) with time was observed. This indicated a reduction of heavy metal stress on the microbial population. The amendments showed...

Heavy Metal Sorption In Anoxic Sedments

Gonzalez, Adrian M.
Fonte: Universidade de Delaware Publicador: Universidade de Delaware
Tipo: Relatório Formato: 6936357 bytes; application/pdf
EN_US
Relevância na Pesquisa
66.25%
The U.S. Environmental Protection Agency is currently developing Sediment Quality Criteria (SQC) for heavy metal chemical contaminants. The approach used in their development is based on Equilibrium Partitioning between sediment and porewater phases. The toxicity of these chemicals is related to the porewater, free-metal chemical potential. Therefore, anything that reduces this activity will reduce the toxicity of the sediment. Sediment studies have identified a reactive pool of solid phase, acid volatile sulfide (AVS) which controls porewater metal activity. In all sediment studies, no toxicity is observed when the metal/AVS molar ratio is less than one. In theory, when the metal/AVS molar ratio is greater than one, sediment porewater activity can potentially reach toxic levels. In certain copper toxicity studies, however, where sediment acid volatile sulfide concentrations were extremely low and sediment copper concentrations relatively high, no toxicity was observed. This apparent anomaly does not refute the acid volatile sulfide theory. It does, however, suggest the presence of one or more additional metalbinding phases which can reduce free-metal copper porewater activity. In this thesis, metal binding to freshwater sediments was investigated in the same oxygen-free and pH buffered conditions found in subsurface...

The Street Scene and the Scene in the Street: a Debate on the Concept of Music Scenery from the Point of View of Heavy Metal in Rio de Janeiro; A Cena da Rua, a Cena na Rua: um Debate sobre o Conceito de Cena Musical a Partir do Heavy Metal no Rio de Janeiro

Vasconcellos, Victor Maurício Barbosa de
Fonte: Programa de Pós Graduação em Geografia - UFRJ Publicador: Programa de Pós Graduação em Geografia - UFRJ
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf
Publicado em 04/12/2011 POR
Relevância na Pesquisa
66.28%
The aim of this paper is to discuss the concept of music scene and to show howthis type of organization can be understood through a geographic perspective. First, the main elements that make up a music scene are discussed. Then, the Heavy Metal scene of Rio de Janeiro is presented, calling attention to the importance that specific spaces have for the organization of this music scene.; O objetivo deste artigo é discutir o conceito de cena musical e demonstrar queesse tipo de organização pode ser compreendido por meio de uma perspectiva geográfica. Primeiramente faremos um debate sobre os elementos que acreditamos serem fundamentais para a formação de uma cena e, na sequência, apresentaremos uma reflexão sobre a cena de heavy metal do Rio de Janeiro, chamando a atenção para a importância que certos espaços possuem para a organização de uma cena musical.

Heavy metal accumulation in Pelargonium hortorum: Effects on growth and development

Orroño,DI; Lavado,RS
Fonte: Phyton (Buenos Aires) Publicador: Phyton (Buenos Aires)
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2009 EN
Relevância na Pesquisa
66.17%
Ornamental plants have been proposed for growing in heavy metal (HM) contaminated soils, and also for phytoremediation. We evaluated (1) biomass production and (2) HM accumulation in Pelargonium hortorum. Plants were grown for 16 weeks on HM (cadmium, chromium, copper, lead, nickel and zinc) enriched soils. Treatments were i) control, non-enriched soil, ii) medium concentration treatment, and iii) high concentration treatment. Four destructive harvests were carried out, and roots, stems, leaves, and flowers were analyzed each time. Concentrations of HM were determined using ICP. Significant reductions in biomass production were observed in HM-enriched soils compared with the control. Different indexes confirmed that P. hortorum was affected by HM. Heavy metals concentrations were higher in roots than shoots. Plant uptake rates of HM in roots and shoots showed different patterns for each element. Flowering was highly sensitive to soil HM concentrations.