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. During which phase of the experiment did the children's urine contain the lowest level of the malathion metabolite?

Question

Want to see more full solutions like this?

Answer 1

Textbook Question

Chapter 40, Problem 1DAA

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

Chapter 40, Problem 1DAA, 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.

During which phase of the experiment did the children's urine contain the lowest level of the malathion metabolite?

Expert Solution & Answer

Summary Introduction

To determine: The phase of the experiment in which children’s urine contains the lowest level of the malathion metabolite.

Concept introduction: Conventionally, the fruits, vegetables, and grains are produced in which pesticides are used. Pesticides such as malathion and chlorpyrifos are neurotoxicant. At the high level, it works by inhibiting acetylcholinesterase. This can lead to paralysis, breathing problem, and even death. Due to its toxic effect, the fruits and vegetable are produced through organic farming without the use of pesticides and gain the label of USDA’s organic label.

Explanation of Solution

The study was performed to assess the effect of eating organic food on the level of pesticides in children’s bodies. The urine samples were collected over the course of 15 days from 23 children aged between 3 to 11years. The samples were tested for the breakdown products of two synthetic pesticides malathion and chlorpyrifos. The study was conducted in three phases. In first phase conventional food was given for 3 days, then the organic food for 5 days, and again conventional food for one week.

Refer to Fig. 40.11 “concentration of metabolites of two pesticides in children’s urine” in the question; the second (organic) phase of the experiment contains mean malathion value of 0.3 µg/liter which is lower than the first phase (conventional phase, 2.9 µg/liter) and the third phase (conventional phase, 4.4 µg/liter) of the mean value. Therefore, in the second phase of the experiment, children’s urine contains the lowest level of the malathion metabolite.

Conclusion

The urine during phase two, when ingesting an organic diet, contained the lowest level of metabolite.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Students have asked these similar questions

unu grow because auxin is still produced in the tip to Another of Boysen and Jensen's experiments included the use of mica, explain why one of the shoots was able to show phototropism and the other was not. Mica Wafer Ligh c. They then t but this time permeable n shoot. Why phototropis Light Mica Wafer Coleoptile tips Tips removed: agar Explain why the shoo direction after the ag the cut shoot, even t

Discussion entries must be at least 250 words to fulfill the assignment requirements. You must complete your entry before you will be able to see the responses of other students. Responses to other students are encouraged but not required. Grading for discussion entries will be based on application of course concepts, proper grammar, and correct punctuation. Read one the attached article and explore the Human Development Index (https://hdr.undp.org/data-center/human-development-index#/indicies/HDI). In your opinion, is the Human Development Index a good measure of the well- being of the people of a nation? Are the items measured in the HDI valid and relevant in the modern global economy? How are they related to the political economy of a nation? The attached articles propose some alternative measures of well-being. In your opinion, are there other measures of well-being that might be better alternatives to the items in the current HDI?

A patient visits her doctor with symptoms typical of a bladder infection. She is immediately prescribed an 800 mgdose of antibiotic (bioavailability = 1/2, t½ = 12 h). The corresponding plasma concentration of drug is found to be 96 micrograms/ml. What is the volume of distribution of this drug? Please round to the nearest liter.

Answer 2

Textbook Question

Chapter 40, Problem 1DAA

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

Chapter 40, Problem 1DAA, 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.

During which phase of the experiment did the children's urine contain the lowest level of the malathion metabolite?

Expert Solution & Answer

Summary Introduction

To determine: The phase of the experiment in which children’s urine contains the lowest level of the malathion metabolite.

Concept introduction: Conventionally, the fruits, vegetables, and grains are produced in which pesticides are used. Pesticides such as malathion and chlorpyrifos are neurotoxicant. At the high level, it works by inhibiting acetylcholinesterase. This can lead to paralysis, breathing problem, and even death. Due to its toxic effect, the fruits and vegetable are produced through organic farming without the use of pesticides and gain the label of USDA’s organic label.

Explanation of Solution

The study was performed to assess the effect of eating organic food on the level of pesticides in children’s bodies. The urine samples were collected over the course of 15 days from 23 children aged between 3 to 11years. The samples were tested for the breakdown products of two synthetic pesticides malathion and chlorpyrifos. The study was conducted in three phases. In first phase conventional food was given for 3 days, then the organic food for 5 days, and again conventional food for one week.

Refer to Fig. 40.11 “concentration of metabolites of two pesticides in children’s urine” in the question; the second (organic) phase of the experiment contains mean malathion value of 0.3 µg/liter which is lower than the first phase (conventional phase, 2.9 µg/liter) and the third phase (conventional phase, 4.4 µg/liter) of the mean value. Therefore, in the second phase of the experiment, children’s urine contains the lowest level of the malathion metabolite.

Conclusion

The urine during phase two, when ingesting an organic diet, contained the lowest level of metabolite.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Textbook Question

Chapter 40, Problem 1DAA

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

Chapter 40, Problem 1DAA, 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.

During which phase of the experiment did the children's urine contain the lowest level of the malathion metabolite?

Expert Solution & Answer

Summary Introduction

To determine: The phase of the experiment in which children’s urine contains the lowest level of the malathion metabolite.

Concept introduction: Conventionally, the fruits, vegetables, and grains are produced in which pesticides are used. Pesticides such as malathion and chlorpyrifos are neurotoxicant. At the high level, it works by inhibiting acetylcholinesterase. This can lead to paralysis, breathing problem, and even death. Due to its toxic effect, the fruits and vegetable are produced through organic farming without the use of pesticides and gain the label of USDA’s organic label.

Explanation of Solution

The study was performed to assess the effect of eating organic food on the level of pesticides in children’s bodies. The urine samples were collected over the course of 15 days from 23 children aged between 3 to 11years. The samples were tested for the breakdown products of two synthetic pesticides malathion and chlorpyrifos. The study was conducted in three phases. In first phase conventional food was given for 3 days, then the organic food for 5 days, and again conventional food for one week.

Refer to Fig. 40.11 “concentration of metabolites of two pesticides in children’s urine” in the question; the second (organic) phase of the experiment contains mean malathion value of 0.3 µg/liter which is lower than the first phase (conventional phase, 2.9 µg/liter) and the third phase (conventional phase, 4.4 µg/liter) of the mean value. Therefore, in the second phase of the experiment, children’s urine contains the lowest level of the malathion metabolite.

Conclusion

The urine during phase two, when ingesting an organic diet, contained the lowest level of metabolite.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Textbook Question

Chapter 40, Problem 1DAA

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

Chapter 40, Problem 1DAA, 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.

During which phase of the experiment did the children's urine contain the lowest level of the malathion metabolite?

Expert Solution & Answer

Summary Introduction

To determine: The phase of the experiment in which children’s urine contains the lowest level of the malathion metabolite.

Concept introduction: Conventionally, the fruits, vegetables, and grains are produced in which pesticides are used. Pesticides such as malathion and chlorpyrifos are neurotoxicant. At the high level, it works by inhibiting acetylcholinesterase. This can lead to paralysis, breathing problem, and even death. Due to its toxic effect, the fruits and vegetable are produced through organic farming without the use of pesticides and gain the label of USDA’s organic label.

Explanation of Solution

The study was performed to assess the effect of eating organic food on the level of pesticides in children’s bodies. The urine samples were collected over the course of 15 days from 23 children aged between 3 to 11years. The samples were tested for the breakdown products of two synthetic pesticides malathion and chlorpyrifos. The study was conducted in three phases. In first phase conventional food was given for 3 days, then the organic food for 5 days, and again conventional food for one week.

Refer to Fig. 40.11 “concentration of metabolites of two pesticides in children’s urine” in the question; the second (organic) phase of the experiment contains mean malathion value of 0.3 µg/liter which is lower than the first phase (conventional phase, 2.9 µg/liter) and the third phase (conventional phase, 4.4 µg/liter) of the mean value. Therefore, in the second phase of the experiment, children’s urine contains the lowest level of the malathion metabolite.

Conclusion

The urine during phase two, when ingesting an organic diet, contained the lowest level of metabolite.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

To determine: The phase of the experiment in which children’s urine contains the lowest level of the malathion metabolite.

Concept introduction: Conventionally, the fruits, vegetables, and grains are produced in which pesticides are used. Pesticides such as malathion and chlorpyrifos are neurotoxicant. At the high level, it works by inhibiting acetylcholinesterase. This can lead to paralysis, breathing problem, and even death. Due to its toxic effect, the fruits and vegetable are produced through organic farming without the use of pesticides and gain the label of USDA’s organic label.

Explanation of Solution

The study was performed to assess the effect of eating organic food on the level of pesticides in children’s bodies. The urine samples were collected over the course of 15 days from 23 children aged between 3 to 11years. The samples were tested for the breakdown products of two synthetic pesticides malathion and chlorpyrifos. The study was conducted in three phases. In first phase conventional food was given for 3 days, then the organic food for 5 days, and again conventional food for one week.

Refer to Fig. 40.11 “concentration of metabolites of two pesticides in children’s urine” in the question; the second (organic) phase of the experiment contains mean malathion value of 0.3 µg/liter which is lower than the first phase (conventional phase, 2.9 µg/liter) and the third phase (conventional phase, 4.4 µg/liter) of the mean value. Therefore, in the second phase of the experiment, children’s urine contains the lowest level of the malathion metabolite.

Conclusion

The urine during phase two, when ingesting an organic diet, contained the lowest level of metabolite.

Answer 8

Expert Solution & Answer

Summary Introduction

To determine: The phase of the experiment in which children’s urine contains the lowest level of the malathion metabolite.

Concept introduction: Conventionally, the fruits, vegetables, and grains are produced in which pesticides are used. Pesticides such as malathion and chlorpyrifos are neurotoxicant. At the high level, it works by inhibiting acetylcholinesterase. This can lead to paralysis, breathing problem, and even death. Due to its toxic effect, the fruits and vegetable are produced through organic farming without the use of pesticides and gain the label of USDA’s organic label.

Explanation of Solution

The study was performed to assess the effect of eating organic food on the level of pesticides in children’s bodies. The urine samples were collected over the course of 15 days from 23 children aged between 3 to 11years. The samples were tested for the breakdown products of two synthetic pesticides malathion and chlorpyrifos. The study was conducted in three phases. In first phase conventional food was given for 3 days, then the organic food for 5 days, and again conventional food for one week.

Refer to Fig. 40.11 “concentration of metabolites of two pesticides in children’s urine” in the question; the second (organic) phase of the experiment contains mean malathion value of 0.3 µg/liter which is lower than the first phase (conventional phase, 2.9 µg/liter) and the third phase (conventional phase, 4.4 µg/liter) of the mean value. Therefore, in the second phase of the experiment, children’s urine contains the lowest level of the malathion metabolite.

Conclusion

The urine during phase two, when ingesting an organic diet, contained the lowest level of metabolite.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

To determine: The phase of the experiment in which children’s urine contains the lowest level of the malathion metabolite.

Concept introduction: Conventionally, the fruits, vegetables, and grains are produced in which pesticides are used. Pesticides such as malathion and chlorpyrifos are neurotoxicant. At the high level, it works by inhibiting acetylcholinesterase. This can lead to paralysis, breathing problem, and even death. Due to its toxic effect, the fruits and vegetable are produced through organic farming without the use of pesticides and gain the label of USDA’s organic label.

Answer 12

Explanation of Solution

The study was performed to assess the effect of eating organic food on the level of pesticides in children’s bodies. The urine samples were collected over the course of 15 days from 23 children aged between 3 to 11years. The samples were tested for the breakdown products of two synthetic pesticides malathion and chlorpyrifos. The study was conducted in three phases. In first phase conventional food was given for 3 days, then the organic food for 5 days, and again conventional food for one week.

Refer to Fig. 40.11 “concentration of metabolites of two pesticides in children’s urine” in the question; the second (organic) phase of the experiment contains mean malathion value of 0.3 µg/liter which is lower than the first phase (conventional phase, 2.9 µg/liter) and the third phase (conventional phase, 4.4 µg/liter) of the mean value. Therefore, in the second phase of the experiment, children’s urine contains the lowest level of the malathion metabolite.

Answer 13

Conclusion

The urine during phase two, when ingesting an organic diet, contained the lowest level of metabolite.

Answer 14

Ch. 40 - Pesticide Residues in Urine To carry the USDAs...Ch. 40 - Pesticide Residues in Urine To carry the USDAs...Ch. 40 - Prob. 3DAA Ch. 40 - An insect's ___ deliver nitrogen-rich waste to its...Ch. 40 - Bowman's capsule, the start of the tubular part of...Ch. 40 - Fluid that enters Bowman's capsule flows directly...Ch. 40 - Blood pressure forces water and small solutes into...Ch. 40 - Kidneys return most of the water and small solutes...Ch. 40 - Prob. 6SQ Ch. 40 - Prob. 7SQ

Concept explainers

Videos

Explanation of Solution

Want to see more full solutions like this?

Chapter 40 Solutions

Additional Science Textbook Solutions