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Application of modified simplex on the development of a preconcentration system for cadmium determination in sediments, food and cigarettes Anais da ABC (AABC)
SANTOS,QUEILA O.; MORENO,ISLANIA; SANTOS,LEANDRO DOS; SANTOS,ALDENOR G.; SOUZA,VALDINEI S.; BEZERRA,MARCOS A..
A modified simplex algorithm was used to optimize a system of preconcentration for cadmium determination in samples of sediments, cigarettes and food using flame atomic absorption spectrometry. The preconcentration system is based on the sorption of cadmium in a minicolumn packed with Amberlite XAD-2 resin functionalized with 3,4-dihydroxybenzoic acid (DHB). The optimized variables were pH and sampling flow rate and the optimum conditions found for these variables were, respectively 8.7 and 8.8 mL min-1. The developed system showed a preconcentration factor of 15.3, detection limit of 0.49 µg L-1, quantification limit of 1.65 µg L-1 and precision expressed as relative standard deviation (% RSD, n=10) of 5.9. The accuracy of the method was checked by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Simplex optimization; Preconcentration; Cadmium; Sediments; Cigarettes; Food.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000300791
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Consumer Willingness to Pay for "Second-Generation" Genetically Engineered Products and the Role of Marketing Information AgEcon
Rousu, Matthew C.; Monchuk, Daniel C.; Shogren, Jason F.; Kosa, Katherine M..
Environmental and consumer groups have called for mandatory labeling of genetically engineered (GE) food products in the United States, stating that consumers have the “right to know.” Herein, we use a nonhypothetical field experiment to examine the willingness to pay for GE-labeled products, using the only second-generation GE product currently on the U.S. market-GE cigarettes. Our results suggest consumers pay less for GE-labeled cigarettes when marketing information is absent. But, when presented with marketing information on the attributes of the cigarette, we find no evidence that consumers pay less for GE-labeled cigarettes.
Tipo: Journal Article Palavras-chave: Auctions; BDM mechanism; Cigarettes; Field experiment; Genetically engineered foods; Second-generation; C91; Q18.
Ano: 2005 URL: http://purl.umn.edu/43501
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The Value of Countermarketing Information to Smokers: Evidence from Field Auctions AgEcon
Rousu, Matthew C.; Nonnemaker, James; Farrelly, Matthew.
Information about cigarettes can help smokers come to an informed decision about what cigarettes to purchase. Countermarketing information, which helps counter potentially biased marketing information, can fill this void, but little is known about the value of this information to smokers. In this paper, we use data from experimental auctions to estimate the value of countermarketing information to smokers. We find that countermarketing information has significant value to smokers who have been exposed to marketing information from tobacco companies, but we find no evidence it provides value to smokers not exposed to marketing information
Tipo: Conference Paper or Presentation Palavras-chave: Field auctions; Value of information; Cigarettes; Consumer/Household Economics; Health Economics and Policy.
Ano: 2009 URL: http://purl.umn.edu/49219
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U.S. CIGARETTE SMOKING AND HEALTH WARNINGS: NEW EVIDENCE FROM POST WORLD WAR II DATA AgEcon
Blaine, Thomas W.; Reed, Michael R..
A framework was developed in order to specify a model for annual U.S. per capita consumption of cigarettes. Three separate time related variables were utilized to measure the effects of health related information regarding smoking. The empirical results from the post World War II data set reveal that while prices and income are important determinants of cigarette consumption, the estimates for both were in the inelastic range. The age distribution of the adult population is also an important variable. While the development of the filter tip has been successful in stimulating smoking, the low tar and nicotine innovation has not had a statistically significant effect. Health information has repeatedly produced substantial short and long run effects....
Tipo: Journal Article Palavras-chave: Cigarettes; Demand; Elasticity; Empirical estimation; Health Economics and Policy.
Ano: 1994 URL: http://purl.umn.edu/15181
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