Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 23
Primeira ... 12 ... Última
Imagem não selecionada

Imprime registro no formato completo
A Comparison of Actual and Hypothetical Willingness to Pay of Parents and Non-Parents for Protecting Infant Health: The Case of Nitrates in Drinking Water AgEcon
Loomis, John B.; Bell, Paul; Cooney, Helen; Asmus, Cheryl.
We estimate adults’ willingness to pay (WTP) to reduce health risks to their own or other families’ infants to test for altruism. A conjoint analysis of adults paying for bottled water found marginal WTP for reduction in risk of shock, brain damage, and mortality in the cash treatment of $2, $3.70, and $9.43, respectively. In the hypothetical market these amounts were $14, $26, and $66, indicating substantial hypothetical bias, although not unexpected due to the topic of infant health. Statistical tests confirm a high degree of altruism in our WTP results, and altruism held even when real money was involved.
Tipo: Journal Article Palavras-chave: Altruism; Conjoint; Drinking water; Nitrates; Validity; Willingness to pay; Agricultural and Food Policy; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety; Health Economics and Policy; Institutional and Behavioral Economics; I10; Q53.
Ano: 2009 URL: http://purl.umn.edu/56657
Imagem não selecionada

Imprime registro no formato completo
A Comparison of Actual and Hypothetical Willingness to Pay of Parents and Non-Parents for Protecting Infants' Health: The Case of Nitrates in Drinking Water AgEcon
Loomis, John B.; Asmus, Cheryl; Bell, Paul.
The objective of this research was to estimate adults' willingness to pay to reduce health risks to their or other families's infants, the latter to test for altruism. A choice experiment was conducted by having adults pay for bottled water for infants to reduce infants' exposure to nitrates in drinking water. Since nitrates only affect infants' health, we have isolated the adults' willingness to pay just for infants' health by buying bottled water to avoid infants' nitrate intake. Respondents were separated into two treatments, one with hypothetical choices, and the other where respondents were told that one of their four choices would be binding, and they would actually buy bottled water using money given to them at the beginning of the experiment....
Tipo: Conference Paper or Presentation Palavras-chave: Altruism; Conjoint; Drinking water; Validity; Willingness to pay; Health Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/9358
Imagem não selecionada

Imprime registro no formato completo
ALTERATION OF NITROGEN CYCLING BY AGRICULTURAL ACTIVITIES, AND ITS ENVIRONMENTAL AND HEALTH CONSEQUENCES Gayana Botánica
Cleemput,Oswald van; Boeckx,Pascal.
The food demands of the increasing world population puts pressure on land use and N availability. In this paper an overview is given of the different N cycling processes affected by agricultural activities. Of the amount of N added to the soil, about half is removed from the field as harvested crop, while the remainder of the N is incorporated into soil organic matter or is lost to other parts of the environment. During the last decades there has been much research on environmental consequences of agricultural activities, mainly on emission of gaseous N compounds (NH3, NO, N2O and N2), but also on N leaching, runoff and erosion. Study of the factors controlling loss of N is complex because of their multiplicity and mutual interactions. More recently...
Tipo: Journal article Palavras-chave: Acidification; Drinking water; Eutrophication; Greenhouse effect; Nitrogen loss; Ozone.
Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432005000200005
Imagem não selecionada

Imprime registro no formato completo
Are Agricultural Measures for Groundwater Protection Beneficial When Compared to Purification of Polluted Groundwater? AgEcon
Hasler, Berit; Lundhede, Thomas.
The groundwater resource, the drinking water areas and the surface water quality can be protected by measures, e.g. by reductions of pesticide and nutrient applications, conversion of arable land to grasslands or forests etc. The objective of the paper is to estimate the benefits of groundwater protection by the valuation method choice experiments. This method allows for separate estimation and comparison of the different attributes connected to groundwater protection i.e. the effects on drinking water and surface water quality as compared to the benefits from cleaning and treatment of polluted drinking water to make it suitable for drinking water consumption. The results indicate that the benefits are significant, and that the willingness to pay for...
Tipo: Conference Paper or Presentation Palavras-chave: Groundwater; Pollution; Drinking water; Valuation; Choice experiments; Environmental Economics and Policy; Resource /Energy Economics and Policy; Q25; Q26; Q28; C42; D62.
Ano: 2005 URL: http://purl.umn.edu/24587
Imagem não selecionada

Imprime registro no formato completo
Behavioral alterations induced by repeated saxitoxin exposure in drinking water J. Venom. Anim. Toxins incl. Trop. Dis.
Diehl,Felipe; Ramos,Patricia Baptista; Santos,Juliane Marques dos; Barros,Daniela Martí; Yunes,João Sarkis.
Abstract Background Blooms of the saxitoxin-producing cyanobacterium Cylindrospermopsis raciborskii have been contaminating drinking water reservoirs in Brazil for many years. Although acute effects of saxitoxin intoxication are well known, chronic deleterious outcomes caused by repeated saxitoxin exposure still require further investigation. The aim of the present work is to investigate the effects of consumption of drinking water contaminated with C. raciborskii for 30 days on learning and memory processes in rats. Methods The effects of saxitoxin (3 or 9 μg/L STX equivalents) or cyanobacteria on behavior was determined using the open field habituation task, elevated plus maze anxiety model task, inhibitory avoidance task, and referential Morris...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Saxitoxin; Drinking water; Behavior; Aversive memory; Spatial memory; Rats.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992016000100314
Imagem não selecionada

Imprime registro no formato completo
Benefits of Safer Drinking Water: The Value of Nitrate Reduction AgEcon
Crutchfield, Stephen R.; Cooper, Joseph C.; Hellerstein, Daniel.
Nitrates in drinking water, which may come from nitrogen fertilizers applied to crops, are a potential health risk. This report evaluates the potential benefits of reducing human exposure to nitrates in the drinking water supply. In a survey, respondents were asked a series of questions about their willingness to pay for a hypothetical water filter, which would reduce their risk of nitrate exposure. If nitrates in the respondent's drinking water were to exceed the EPA minimum safety standard, they would be willing to pay $45 to $60, per household, per month, to reduce nitrates in their drinking water to the minimum safety standard. There are 2.9 million households in the four regions studied (White River area of Indiana, Central Nebraska, Lower...
Tipo: Report Palavras-chave: Water quality; Drinking water; Nitrates; Benefits; Contingent valuation; Resource /Energy Economics and Policy.
Ano: 1997 URL: http://purl.umn.edu/34025
Imagem não selecionada

Imprime registro no formato completo
Cyanobacterial occurrence and detection of microcystin by planar chromatography in surface water of Billings and Guarapiranga Reservoirs, SP, Brazil Rev. Bras. Bot.
Carvalho,Luciana R. de; Sant'Anna,Célia L.; Gemelgo,Marcina C.P.; Azevedo,Maria Teresa de P..
Billings and Guarapiranga Reservoirs were deeply affected by environmental disturbances, which more evident consequence are the cyanobacterial blooms. Microcystins are the most common cyanotoxin in freshwaters and more than 70 types are known. Different methods for microcystins analysis in water can be used, among which ELISA and HPLC are the most frequently employed. However, less sophisticated and more economic methods can also be used. This is the case of planar chromatography (thin-layer chromatography) method previously used in cyanotoxins purification but gradually replaced by others. Posterior optimization of the microcystin chromatography conditions and because of its simplicity, rapidity, efficiency and low cost, this method is again considered an...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cyanobacteria; Drinking water; Microcystins; Planar chromatography; Reservoirs.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000100014
Imagem não selecionada

Imprime registro no formato completo
Déficit hídrico e consumo de água para processamento da cana-de-açúcar: o caso da bacia do PCJ (UGRHI 5)*. Repositório Alice
TORQUATO, S. A.; JESUS, K. R. E. de.
Resumo: A região de Piracicaba é tradicional produtora de cana-de-açúcar e na safra 2012/13 apresentou 327 mil hectares de área plantada. Os benefícios ambientais gerados com a eliminação da queima da cana para fins de colheita, também repercutem na diminuição do consumo de água pelas usinas. A mudança do sistema de colheita, com eliminação da queima, excluiu a necessidade do uso da água para a lavagem da cana-de-açúcar. No levantamento realizado para o Protocolo Agroambiental, feito nas usinas signatárias e com atividades na região da bacia do PCJ durante períodos de estresse hídrico, foi possível constatar que as 14 usinas desta região consomem em média 1,97 mm de água por tonelada de cana-de-açúcar. Esse trabalho apresenta os dados de precipitação...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Consumo de água; Protocolo agroambiental; Precipitation; Drinking water; Agro-Environmental protocol; Precipitação; Cana-de-açúcar; Deficiência hídrica; Sugarcane; Sugar industry; Water utilization.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1035569
Imagem não selecionada

Imprime registro no formato completo
Do Supervisors Affect the Valuation of Public Goods? AgEcon
Franceschi, Dina; Vásquez, William F..
Systematic supervision procedures have been proposed to improve contingent valuation surveying, particularly in developing countries. Surprisingly, the CV literature does not say much about the potential effects of supervision even though there is evidence of interviewer effects and social desirability issues that can bias results. This paper investigates the effects of interview supervision on the valuation of public services, using split-sample treatments to include a test of scope of a nested good and to assess the effect of interview supervision on reported WTP. Results suggest that supervisors can be used to improve quality with no effect on WTP estimates.
Tipo: Journal Article Palavras-chave: Contingent valuation; Drinking water; Nicaragua; Social desirability; Supervision effects; Willingness to pay; Community/Rural/Urban Development; Consumer/Household Economics; Environmental Economics and Policy; Public Economics; Research Methods/ Statistical Methods.
Ano: 2011 URL: http://purl.umn.edu/117771
Imagem não selecionada

Imprime registro no formato completo
Factibilidad de aplicación de una arcilla cubana para el enriquecimiento en minerales de agua potable OceanDocs
Santa Cruz, L.; Castro, D.; Sardiñas, O..
Como parte del proyecto de implementación de la dieta macrobiótica en Cuba se valoró la situación de una arcilla italiana, empleada para enriquecer al agua potable con sales minerales, por una cubana similar (bentonita natural de Managua tipo 1). La caracterización minerológica, química y granulométrica de ambas arcillas fue similar. Se estudió el efecto de tres concentraciones de arcilla cubana en agua potable (0,1; 0,5 y 1 %) después de 24 h. Este tratamiento incrementó significativamente las concentraciones de sodio, magnesio y hierro y disminuyó las de calcio, cinc y cobre en el agua; todos los elementos cumplieron con las normas vigentes de agua potable.
Tipo: Journal Contribution Palavras-chave: Clay minerals; Water; Minerals; Food; Diets; Drinking water.
Ano: 2008 URL: http://hdl.handle.net/1834/5013
Imagem não selecionada

Imprime registro no formato completo
Groundwater pollution and emerging environmental challenges of industrial effluent irrigation in Mettupalayam Taluk, Tamil Nadu AgEcon
Mukherjee, Sacchidananda; Nelliyat, Prakash.
Industrial disposal of effluents on land and the subsequent pollution of groundwater and soil of surrounding farmlands – is a relatively new area of research. The environmental and socioeconomic aspects of industrial effluent irrigation have not been studied as extensively as domestic sewage based irrigation practices, at least for a developing country like India. The disposal of effluents on land has become a regular practice for some industries. Industries located in Mettupalayam Taluk, Tamil Nadu, dispose their effluents on land, and the farmers of the adjacent farmlands have complained that their shallow open wells get polluted and also the salt content of the soil has started building up slowly. This study attempts to capture the environmental and...
Tipo: Working or Discussion Paper Palavras-chave: Groundwater; Water pollution; Income; Water quality; Irrigation water; Effluents; Wells; Drinking water; Domestic water; Households; Soil salinity; Crop management; Agricultural and Food Policy; Crop Production/Industries; Resource /Energy Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/91902
Imagem não selecionada

Imprime registro no formato completo
Influence of the apparent molecular size of humic substances on the efficiency of coagulation using Fenton's reagent Anais da ABC (AABC)
DE JULIO,MARCELO; DE JULIO,TATIANE S.; DI BERNARDO,LUIZ.
This work used Fenton's reagent as a coagulating agent in the treatment of water samples with high true colour caused by humic substances (HS) extracted from peat. In addition, the effects of the apparent molecular size of HS on coagulation, flocculation and flotation were studied. To that end, four distinct water samples having the same true colour were prepared using HS with different molecular sizes, which were obtained by ultrafiltration fractioning. Through optimisation of coagulant dosage and coagulation pH, as well as posterior construction of coagulation diagrams for each water sample, it was verified that the sample prepared with the smallest apparent molecular size of HS was the most difficult to treat, requiring higher coagulant (Fenton's...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coagulation; DAF; Drinking water; Fenton's reagent; Humic substances; Molecular size.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200833
Imagem não selecionada

Imprime registro no formato completo
Multiple use schemes: Benefit to smallholders AgEcon
Pant, Dhruba; Gautam, Kamal Raj; Shakya, Sabita Dhakhwa; Adhikari, Deepak Lochan.
Tipo: Working or Discussion Paper Palavras-chave: Irrigation programs; Water supply; Domestic water; Drinking water; Irrigation water; Drip irrigation; Sprinkler irrigation; Vegetables; Cereals; Women; Land ownership; Participatory management; Farmer participation; Water users; Social aspects; Households; Income; Credit; Crop Production/Industries; Farm Management; Labor and Human Capital; Land Economics/Use; Production Economics; Public Economics; Resource /Energy Economics and Policy.
Ano: 2006 URL: http://purl.umn.edu/91944
Imagem não selecionada

Imprime registro no formato completo
Multiple-use water services to advance the millennium development goals AgEcon
van Koppen, Barbara; Moriarty, Patrick; Boelee, Eline.
This research report presents the findings of the first phase of the action-research project "Models for implementing multiple-use water supply systems for enhanced land and water productivity, rural livelihoods and gender equity." Multipleuse water services, or "mus" in short, is a participatory, integrated and poverty-reduction focused approach in poor rural and peri-urban areas, which takes people's multiple water needs as a starting point for providing integrated services, moving beyond the conventional sectoral barriers of the domestic and productive sectors.
Tipo: Report Palavras-chave: Water supply; Poverty; Models; Irrigation water; Domestic water; Drinking water; Gender; Cost recovery; Water quality; Environmental sustainability; Participatory management; Social participation; Legislation; Community/Rural/Urban Development; Crop Production/Industries; Environmental Economics and Policy; Farm Management.
Ano: 2006 URL: http://purl.umn.edu/44523
Imagem não selecionada

Imprime registro no formato completo
Oil and Water Don't Mix: Risk on Tap in Western Siberia AgEcon
Wernstedt, Kris.
In common with other areas throughout the Russian Federation, western Siberia faces formidable environmental pollution, a problem that in part is the legacy of the highly centralized Soviet era when meeting production quotas was the raison d'être for many managers of economic enterprises. In this region, over the last thirty years the near singular focus on short term oil production has led to severe contamination of the area's surface and groundwater supplies, threatening both human and ecological health. At the same time, revenues from continued oil extraction may provide the means to address some of the environmental problems. In light of the struggling economy and potential political instability, however, it is particularly critical that authorities...
Tipo: Working or Discussion Paper Palavras-chave: Transitional economies; Drinking water; Oil contamination; Health risk; Prioritization; Least cost planning; Russia; Siberia; Environmental Economics and Policy; I18; Q28.
Ano: 1996 URL: http://purl.umn.edu/10887
Imagem não selecionada

Imprime registro no formato completo
Putative new heat-stable cytotoxic and enterotoxic factors in culture supernatant of Escherichia coli isolated from drinking water J. Venom. Anim. Toxins incl. Trop. Dis.
Ribeiro,DA; Niemann,FS; Gatti,MSV; Lanna,MCS; Tsuji,T; Yano,T.
Enteric infections caused by the ingestion of contaminated water, especially by Escherichia coli, are important to define the virulence properties of these bacteria. Due to frequent infantile diarrhea in the city of Ouro Preto, Minas Gerais state, Brazil, the phenotypic and genotypic diarrheagenic properties of E. coli isolated from drinking water were studied. The culture supernatants of 39 (40%) among a total of 97 E. coli isolates from drinking water were positive by suckling mouse assay and induced cytotoxic effects on Vero cells. The enterotoxic and cytotoxic activities were present in the fraction with less than 10 kDa and were not lost when heated up to 60°C and 100°C for 30 minutes. PCR assays showed that among these 39 Vero cytotoxigenic E. coli,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Escherichia coli; Drinking water; Cytotoxin; Enterotoxin.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992011000100014
Imagem não selecionada

Imprime registro no formato completo
Quality of water sources used as drinking water in a Brazilian peri-urban area BJM
Razzolini,Maria Tereza Pepe; Günther,Wanda Maria Risso; Peternella,Francisca Alzira dos Santos; Martone-Rocha,Solange; Bastos,Veridiana Karmann; Santos,Thaís Filomena da Silva; Cardoso,Maria Regina Alves.
The objective of this paper was to assess bacteriological quality of drinking water in a peri-urban area located in the Metropolitan Region of São Paulo, Brazil. A total of 89 water samples were collected from community plastic tanks and 177 water samples from wells were collected bimonthly, from September 2007 to November 2008, for evaluating bacteriological parameters including: Escherichia coli, Enterococcus and heterotrophic plate count (HPC). Clostridium perfringens was investigated in a subsample (40 samples from community plastic tank and 40 from wells). E. coli was present in 5 (5.6%) samples from community plastic tanks (2.0 - 5.1x10(4) MPN/100mL) and in 70 (39.5%) well samples (2.0 - 8.6x10(4) MPN/100mL). Thus, these samples were not in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Clostridium perfringens; Escherichia coli; Enterococcus; Peri-urban area; Drinking water.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000200021
Imagem não selecionada

Imprime registro no formato completo
Strategic Analyses of the National River Linking Project (NRLP) of India Series 5; Proceedings of the Second National Workshop on Strategies Issues in Indian Irrigation AgEcon
International Water Management Institute (IWMI).
Tipo: Presentation Palavras-chave: Irrigation management; Institutional reform; Surface irrigation; River basin management; Water transfer; Investment; Irrigation programs; Policy; Water users associations; Groundwater management; Groundwater recharge; Water supply; Drinking water; Watershed management; Crops; Crop Production/Industries; Financial Economics; Institutional and Behavioral Economics; Resource /Energy Economics and Policy.
Ano: 2009 URL: http://purl.umn.edu/118413
Imagem não selecionada

Imprime registro no formato completo
Taking a multiple-use approach to meeting the water needs of poor communities brings multiple benefits AgEcon
International Water Management Institute (IWMI); International Water and Sanitation Centre; Global Water Partnership (GWP).
This briefing was produced by International Water Management Institute (IWMI), the IRC International Water and Sanitation Centre, the Technical Committee of the Global Water Partnership (GWP) and the GWP Advisory Center at IWMI. It draws primarily on research from the Multiple Use Systems (MUS) project and the Productive Uses of Water Thematic Group (Prodwat) (see references for further reading). The brief complements Catalyzing Change, the GWP handbook for developing IWRM and water efficiency strategies and plans, and the associated policy and technical briefs. Single-use approaches to water development and management do not reflect the realities of poor people’s water use. People use domestic water supplies for activities such as irrigating backyard...
Tipo: Report Palavras-chave: Water use; Domestic water; Irrigation water; Poverty; Water supply; Drinking water; Agricultural and Food Policy; Food Security and Poverty.
Ano: 2006 URL: http://purl.umn.edu/113060
Imagem não selecionada

Imprime registro no formato completo
The occurrence of Aeromonas in drinking water, tap water and the Porsuk River BJM
Kivanc,Merih; Yilmaz,Meral; Demir,Filiz.
The occurrence of Aeromonas spp. in the Porsuk River, public drinking water and tap water in the City of Eskisehir (Turkey) was monitored. Fresh water samples were collected from several sampling sites during a period of one year. Total 102 typical colonies of Aeromonas spp. were submitted to biochemical tests for species differentiation and of 60 isolates were confirmed by biochemical tests. Further identifications of isolates were carried out first with the VITEK system (BioMe˜rieux) and then selected isolates from different phenotypes (VITEK types) were identified using the DuPont Qualicon RiboPrinter® system. Aeromonas spp. was detected only in the samples from the Porsuk River. According to the results obtained with the VITEK system, our isolates were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aeromonas spp; Drinking water; River water; Tap water; Riboprinter.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100016
Registros recuperados: 23
Primeira ... 12 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional