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Registros recuperados: 23
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Biochemical effect of aquatic environmental pollution on the fishermen health OceanDocs
Saad, A.A.; El-Sekeily, A.M.; Moafy, N.M.; Youssef, A.I..
This study is an attempt to describe a human health risk assessment as a function of recreationl activities in relation to environmental pollution of El-Mex bay through studying the Haemoglobin-adducts (Hb-adducts) of three aromatic amines namely benzidine, alpha and beta naphthylamine as biomarker for exposure as well as biochemical effects of these pollutants on fishermen in this area, beside the determination of these substances in the tissues of 2 types of fish at the same area. The sturdy was conducted on 21 control male subjects and 78 volunteers fishermen, all the 99 subjects were chosen to be smokers. Blood glutathione content was significantly decreased in fislrermen compared with controls. On the other hand glutathione-S-transferase,...
Tipo: Journal Contribution Palavras-chave: Accumulation; Biological data; Pollution control; Aquatic environment; Health; Pollution control; Biological indicators; Http://aims.fao.org/aos/agrovoc/c_6078; Http://aims.fao.org/aos/agrovoc/c_25632.
Ano: 2004 URL: http://hdl.handle.net/1834/1211
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Characterization of an acidification and equalization tank (AET) operating as a primary treatment of swine liquid effluent BABT
Motteran,Fabrício; Pereira,Erlon Lopes; Campos,Claudio Milton Montenegro.
This work evaluated the potential of the acidification equalization tank (AET) used as a primary treatment unit, treating the hog farming wastewater. The treatment system consisted of a degritter with a triangular-notch weir, for measuring the flow, a static sieve, and an acidification and equalization tank (AET), an anaerobic baffled reactor (ABR), an upflow anaerobic sludge blanket (UASB) reactor, a settling tank, a greenhouse for fertirrigation and two infiltration ponds. The AET had a net capacity of 8,000 liters, internally covered with asphalt blanket, worked based on surface loading rates application. The unit operated continuously, with its flow varying from 0.1 to 10 L s-1. To determine the efficiency, the following parameters were measured: pH;...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Swine effluent; Organic matter removal; Primary treatment; Pollution control; Inexpensive technologies.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000300017
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Coffee acclimation to high temperatures involves lipid composition changes of chloroplast membranes and is strenghtened by elevated air CO2 concentration. Repositório Alice
RODRIGUES, W. P.; MARTINS, M. Q.; FORTUNATO, A. S.; MARTINS, L. D.; PAIS, I. P.; COLWELL, F.; LEITÃO, A. E.; RODRIGUES, A. P.; CAMPOSTRINI, E.; GHINI, R..
Depending on the greenhouse gas emission scenarios, air [CO2] could rise to between 421 and 936 ?L L-1, accompanied by a global surface warming between 0.3 and 4.8?C along the 2nd half of the present century. It is well known that supra-optimal air temperatures may cause significant disturbances in metabolism and plant growth, since biochemical reactions are accelerated, the chemical bonds are weakened and the lipid matrix of membranes becomes more fluid. Thylakoid membranes are particularly sensitive to supra-optimal temperatures, so that impairments at the photochemical steps of photosynthesis are among the first indicators of sensitivity to heat stress. Plants acclimate to thermal stress by means of a myriad of mechanisms, such as, increased expression...
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Fatty acids; Chloroplasts; Climate change; Heat stress; Lipids; Pollution control.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1068039
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Controlling a Stock Pollutant with Endogenous Abatement Capital and Asymmetric Information AgEcon
Karp, Larry S.; Zhang, Jiangfeng.
Non-strategic firms with rational expectations make investment and emissions decisions. The investment rule depends on firms' beliefs about future emissions policies. We compare emissions taxes and quotas when the (strategic) regulator and (nonstrategic) firms have asymmetric information about abatement costs, and all agents use Markov Perfect decision rules. Emissions taxes create a secondary distortion at the investment stage, unless a particular condition holds; emissions quotas do not create a secondary distortion. We solve a linear-quadratic model calibrated to represent the problem of controlling greenhouse gasses. The endogeneity of abatement capital favors taxes, and it increases abatement.
Tipo: Working or Discussion Paper Palavras-chave: Pollution control; Investment; Asymmetric information; Rational expectations; Choice of instruments; Environmental Economics and Policy; C61; D8; H21; Q28.
Ano: 2002 URL: http://purl.umn.edu/25071
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Depuration: An administrative overview ArchiMer
Somerset, I.
At the 1964 National Shellfish Sanitation Workshop, Mr. Eugene Jensen presented a thought-provoking paper outlining the rationale for the depuration of shellfish. Mr. Jensen noted that "we are committed to the principal that shellfish must be as safe to eat as other ordinary food" and that "the problems of assuring the sanitary quality of coastal areas will increase rather than diminish. This is not the same as saying that pollution will increase" (Jensen, 1964). It is recognised that additional use of the waters and shore areas will have adverse impacts on the water quality and shellfish resource quantity and quality. If we are to maintain a program which will permit the consumer to eat shellfish in any form they choose, we must develop the means to...
Tipo: Text Palavras-chave: France; Bivalvia; Shellfish; Water quality; Legislation; Pollution control; Self purification; Public health.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1590.pdf
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Development of a HACCP-based program for a private shellfish purification facility ArchiMer
Howell, T; Jones, S; Nardi, G.
A HACCP-based program is developed for the Spinney Creek Oyster Company (SCOC) Shellfish Purification Facility under a pilot program funded and implemented by the New England Fisheries Development Association (NEFDA). The SCOC Facility, which includes a government approved in-house coliform laboratory, is fully licensed for oysters and clams under State of Maine and NSSP regulations. SCOC's business is producing value-added, quality-assured shellfish for premium, health conscious markets. To accomplish this, SCOC uses shellfish harvested from approved waters which is an important distinction from other purification plants which process shellfish originating from restricted waters. It was necessary to create a flow chart of the various steps involved in the...
Tipo: Text Palavras-chave: Bivalvia; Pollution control; Public health; Methodology; Self purification; Shellfish; Marine molluscs.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/1992/acte-1608.pdf
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Enrichment of population density of a bacterial consortium during bioremediation of a soil under successive contaminations with diesel oil Biological Sciences
Leal, Patrícia Lopes; Pinheiro Dadalto, Silvana; Fernandes, Rita de Cássia Rocha; Queiroz, Maria Eliana Lopes Ribeiro; Tótola, Marcos Rogério.
The effect of successive soil contamination with diesel oil was evaluated on population dynamics of a bacterial consortium (Acinetobacter baumannii LBBMA 04, Pseudomonas aeruginosa LBBMA 58, Ochrobactrum anthropi LBBMA 88b, Acinetobacter baumannii LBBMAES11, and Bacillus subtilis LBBMA 155) and on biodegradation of petroleum hydrocarbons (n-C12-C22). After each contamination with diesel oil, soil samples were collected for assessment of bacterial population and sequence of petroleum hydrocarbons degradation. At 20 and 40 days, the highest percentage of degradation was observed for the higher carbon chain hydrocarbons (n-C21 and C22). After the third contamination, there was a considerable reduction of n-C21degradation and a high degradation of hydrocarbons...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ciências Agrárias; Microbiologia; Biorremediação bioaugmentation; Biodegradation; Pollution control; Hydrocarbons. Ciências Agrárias I.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/36904
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Etude de la concentration des metaux traces chez "Hexaplex trunculus " (muricidae) le long du littoral tunisien OceanDocs
Tissaoui, Ch.; Chouba, L.; El Abed, O..
La Tunisie dispose d’une ressource importante en coquillages, plusieurs espèces sont commercialisées et elles ont fait l’objet de programmes de qualité pour la sauvegarde de la santé humaine. Dans ce contexte, nous avons réalisé un suivi saisonnier de la concentration de trois métaux traces toxiques, le cadmium (Cd), le plomb (Pb), et le mercure (Hg) dans la totalité de la masse molle, dans le pied et dans les viscères d’un Mollusque Gastéropode, l’Hexaplex trunculus communément appelé en Tunisie « Bakouma ». Les Hexaplex proviennent des golfes de Tunis et de Gabès et des lagunes de Bizerte et de Tunis durant la période 2003 - 2004. Les échantillons sont analysés par spectrométrie d’absorption atomique (SAA) à four graphite et à correction Zeeman (Varian...
Tipo: Journal Contribution Palavras-chave: Pollution monitoring; Trace metals; Pollution control; Http://aims.fao.org/aos/agrovoc/c_6078.
Ano: 2008 URL: http://hdl.handle.net/1834/4153
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Fiscal Interactions and the Costs of Controlling Pollution from Electricity AgEcon
Parry, Ian W.H..
This paper quantifies the costs of controlling SO2, carbon, and NOx emissions from power generation, accounting for interactions between environmental policies and the broader fiscal system. We distinguish a dirty technology (coal) that satisfies baseload demand and a clean technology (gas) that is used during peak periods, and we distinguish sectors with and without regulated prices. Estimated emissions control costs are substantially lower than in previous models of fiscal interactions that assume a single, constant returns technology and competitive pricing. The results are reasonably robust to alternative scenarios, such as full price deregulation and market power in the deregulated sector.
Tipo: Working or Discussion Paper Palavras-chave: Electricity generation; Pollution control; Fiscal interventions; Price regulation; Multiple technology; Environmental Economics and Policy; Q28; H21; H23; L94.
Ano: 2004 URL: http://purl.umn.edu/10785
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(In)Efficient Management of Interacting Environmental Bads AgEcon
Kuosmanen, Timo; Laukkanen, Marita.
Many environmental problems involve the transformation of multiple harmful substances into one or more damage agents much in the same way as a firm transforms inputs into outputs. Yet environmental management differs from a firm’s production in one important respect: while a firm seeks efficient input allocation to maximize profit, an environmental planner allocates abatement efforts to render the production of damage agents as inefficient as possible. We characterize a solution to the hmultiple pollutants problem and show that the optimal policy is often a corner solution, in which abatement is focused on a single pollutant. Corner solutions may arise even in well-behaved problems with concave production functions and convex damage and cost functions....
Tipo: Working or Discussion Paper Palavras-chave: Climate change; Cost-benefit analysis; Eutrophication; Multiple pollutants; Optimal environmental policy; Pollution control; Environmental Economics and Policy.
Ano: 2009 URL: http://purl.umn.edu/54287
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Mitigation of nitrous oxide emission from cattle excreta in pasture with dicyandiamide (DCD). Repositório Alice
LUZ, P. C. I. da; SIMON, P. L.; BREVILIERI, C.; DIECKOW, J.; ZANATTA, J. A..
2016
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Óxido nitroso; Gases de efeito estufa; Mitigação; Excreta; Nitrous oxide; Greenhouse gas emissions; Pollution control.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1059437
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On the Implications of Technological Innovation for Environmental Policy AgEcon
Parry, Ian W.H..
This paper draws on a number of recent studies to shed light on several policy issues raised by the impact of environmental policies on technological innovation. First, to what extent does induced innovation raise the overall net benefits to society from environmental policies? Second, how does induced innovation affect the appropriate choice among alternative environmental policy instruments? Third, how does it affect the optimal stringency of environmental regulations? Fourth, should environmental policies be supplemented with additional policies to promote innovation, such as research contracts or prizes for new technologies?
Tipo: Working or Discussion Paper Palavras-chave: Environment; Technological innovation; Pollution control; Instrument choice; Environmental Economics and Policy; Q28; O38.
Ano: 2001 URL: http://purl.umn.edu/10797
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Phosphorus-Based Application of Livestock Manure and the Law of Unintended Consequences AgEcon
Norwood, F. Bailey; Chvosta, Jan.
The application of manure phosphorus at rates above crop uptake has resulted in water pollution for some regions. In response, new manure management standards will require some farms to match manure phosphorus applications rates with crop uptake. For some regions, this will lead to more crop acres and a shift toward crops with greater nutrient uptake, both of which will increase nitrogen runoff. The greater nitrogen runoff could offset the lower phosphorus runoff to result in greater water pollution. This demonstrates the law of unintended consequences, which results when policy does not consider how economic agents respond to incentives.
Tipo: Journal Article Palavras-chave: Best management practice; Eutrophication; Manure management; Nutrient runoff; Phosphorus standards; Pollution control; Water pollution; Environmental Economics and Policy; Production Economics; D6; Q1; Q2.
Ano: 2005 URL: http://purl.umn.edu/43715
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Public Disclosure of Industrial Pollution: The PROPER Approach for Indonesia? AgEcon
Lopez, Jorge Garcia; Sterner, Thomas; Afsah, Shakeb.
This paper evaluates the effectiveness of the Program for Pollution Control Evaluation and Rating (PROPER) in Indonesia. PROPER, the first major public disclosure program in the developing world, was launched in June 1995; though it collapsed in 1998 with the Asian financial crisis, it is currently being revived. There have been claims of success for this pioneering scheme, yet little formal analysis has been undertaken. We analyze changes in emissions concentrations (mg/L) using panel data techniques with plant-level data for participating firms and a control group. The results show that there was indeed a positive response to PROPER, especially among firms with poor environmental compliance records. The response was immediate, and firms pursued further...
Tipo: Working or Discussion Paper Palavras-chave: Environmental policy; Pollution control; Public disclosure; Asia; Indonesia; Environmental Economics and Policy.
Ano: 2004 URL: http://purl.umn.edu/10482
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Regulating Government AgEcon
Davies, Terry; Probst, Katherine N..
Federal, state, and local governments are major polluters of the environment. They account for more than 7% of SO2 air pollution emissions and more than 5% of all NO2 air emissions in the United States. Public entities are more likely than private ones to be in violation of the Clean Water Act, and they account for two-thirds of all major facilities in significant noncompliance with the act. Department of Energy nuclear sites are the worst hazardous waste problems in the nation. A lack of adequate data makes it difficult to fully characterize the extent of pollution caused by government agencies and to compare the performance of the public and private sectors. There are many reasons why government pollution is difficult to regulate. The paper discusses...
Tipo: Working or Discussion Paper Palavras-chave: Pollution control; Federal facilities; Regulation; Intergovernmental relations; Political Economy.
Ano: 2001 URL: http://purl.umn.edu/10594
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Regulation of Stock Externalities with Correlated Costs AgEcon
Karp, Larry S.; Zhang, Jiangfeng.
We study a dynamic regulation model where firms' actions contribute to a stock externality. The regulator and firms have asymmetric information about serially correlated abatement costs. With price-based policies such as taxes, or if firms trade quotas efficiently, the regulator learns about the evolution of both stock and costs. This ability to learn about costs is important in determining the ranking of taxes and quotas, and in determining the value of a feedback rather than an open-loop policy.
Tipo: Working or Discussion Paper Palavras-chave: Pollution control; Asymmetric information; Learning; Correlated costs; Choice of instruments; Environmental Economics and Policy; C61; D8; H21; Q28.
Ano: 2003 URL: http://purl.umn.edu/25077
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Streamside management zone (SMZ) efficiency in herbicide retention from simulated surface flow Planta Daninha
Matos,A.T.; Pinho,A.P.; Costa,L.M.; Morris,L.A..
Plot-scale overland flow experiments were conducted to evaluate the efficiency of streamside management zones (SMZs) in retaining herbicides in runoff generated from silvicultural activities. Herbicide retention was evaluated for five different slopes (2, 5, 10, 15, and 20%), two cover conditions (undisturbed O horizon and raked surface), and two periods under contrasting soil moisture conditions (summer dry and winter wet season) and correlated to O horizon and site conditions. Picloram (highly soluble in water) and atrazine (moderately sorbed into soil particles) at concentrations in the range of 55 and 35 µg L-1 and kaolin clay (approximately 5 g L-1) were mixed with 13.000 liters of water and dispersed over the top of 5 x 10 m forested plots. Surface...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pollution control; Silviculture; Pesticides; Runoff.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582008000100014
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TAXES AND QUOTAS FOR A STOCK POLLUTANT WITH MULTIPLICATIVE UNCERTAINTY AgEcon
Hoel, Michael; Karp, Larry S..
Replaced with revised version of paper 02/06/06.
Tipo: Working or Discussion Paper Palavras-chave: Pollution control; Asymmetric information; Taxes and quotas; Stochastic control; Global warming; Multiplicative disturbances; Environmental Economics and Policy; H21; Q28.
Ano: 1999 URL: http://purl.umn.edu/25030
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Taxes Versus Quantities for a Stock Pollutant with Endogenous Abatement Costs and Asymmetric Information AgEcon
Karp, Larry S.; Zhang, Jiangfeng.
Non-strategic firms with rational expectations make investment and emissions decisions. The investment rule depends on firms’ beliefs about future emissions policies. We compare emissions taxes and quotas when the (strategic) regulator and (nonstrategic) firms have asymmetric information about abatement costs, and all agents use Markov Perfect decision rules. Emissions taxes create a secondary distortion at the investment stage, unless a particular condition holds; emissions quotas do not create a secondary distortion. We solve a linear-quadratic model calibrated to represent the problem of controlling greenhouse gasses. The endogeneity of abatement capital favors taxes, and it increases abatement.
Tipo: Thesis or Dissertation Palavras-chave: Pollution control; Investment; Asymmetric information; Rational expectations; Choice of instruments; Resource /Energy Economics and Policy; C61; D8; H21; Q28.
Ano: 2008 URL: http://purl.umn.edu/42877
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Taxes Versus Quotas for a Stock Pollutant AgEcon
Hoel, Michael; Karp, Larry S..
We compare the effects of taxes and quotas for an environmental problem in which the regulator and polluter have asymmetric information about abatement costs, and the environmental damage depends on the stock of pollution. We thus extend, to a dynamic framework, previous studies in which environmental damages depend on the flow of pollution. As with the static analysis, an increase in the slope of the marginal abatement cost curve, or a decrease in the slope of the marginal damage curve, favors taxes. In addition, in the dynamic model, an increase in the discount rate or the stock decay rate favor the use of taxes. Taxes certainly dominate quotas if the length of a period during which decisions are constant is sufficiently small. An empirical illustration...
Tipo: Working or Discussion Paper Palavras-chave: Pollution control; Asymmetric information; Taxes and quotas; Stochastic control; Environmental Economics and Policy; H21; Q28.
Ano: 2001 URL: http://purl.umn.edu/25010
Registros recuperados: 23
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