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Pesticide Residues in Urine To carry the USDA’s organic label (right), food must be produced without synthetic pesticides that farmers often use on conventionally grown, fruits, vegetables, and many grains. Chensheng Lu of Emory University used urine testing to see whether eating organic food has a significant effect on the levels of pesticides in children's bodies ( FIGURE 40.11 ). Over the course of 15 days, Lu and his colleagues collected the urine of 23 children (aged 3 to 11) and tested it for breakdown products of two synthetic pesticides. The children ate their normal diet of conventionally grown foods for three days, switched to organic versions of the same foods and drinks for five days, then returned to their convention.al diet for a week FIGURE 40.11 Concentrations of metabolites of two pesticides (malathion and chlorpyrifos) in children’s urine during the three different phases of the study. The difference in the mean level of metabolites between the organic and conventional phases of the study was statistically significant. Did switching to an organic diet lower the amount of pesticide residues excreted by the children?

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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
BuyFind

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

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Chapter
Section
Chapter 40, Problem 3DAA
Textbook Problem

Pesticide Residues in Urine To carry the USDA’s organic label (right), food must be produced without synthetic pesticides that farmers often use on conventionally grown, fruits, vegetables, and many grains.

Chensheng Lu of Emory University used urine testing to see whether eating organic food has a significant effect on the levels of pesticides in children's bodies (FIGURE 40.11). Over the course of 15 days, Lu and his colleagues collected the urine of 23 children (aged 3 to 11) and tested it for breakdown products of two synthetic pesticides. The children ate their normal diet of conventionally grown foods for three days, switched to organic versions of the same foods and drinks for five days, then returned to their convention.al diet for a week

Chapter 40, Problem 3DAA, Pesticide Residues in Urine To carry the USDAs organic label (right), food must be produced without , example  1

Chapter 40, Problem 3DAA, Pesticide Residues in Urine To carry the USDAs organic label (right), food must be produced without , example  2

FIGURE 40.11 Concentrations of metabolites of two pesticides (malathion and chlorpyrifos) in children’s urine during the three different phases of the study. The difference in the mean level of metabolites between the organic and conventional phases of the study was statistically significant.

Did switching to an organic diet lower the amount of pesticide residues excreted by the children?

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