Difference between revisions of "Team:SSHS-Shenzhen/Human Practices/5"

 
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Survey of people about their opinions of chemical pesticide and its effect and insecticidal-genetic spray
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<h1>
 
<h1>
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Learning to quickly detect pesticide residues
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Brief summary
 
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<h2>
 
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Date: August 18, 2018<br><br>
 
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Location: Research lab at Shenzhen University
 
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<p id="para">
 
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On August 18th, five of our iGEM team members gathered at the laboratory of Shenzhen University to find out methods for quickly detecting pesticide residues on vegetable leaves. <br><br>
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We bought three groups of vegetables from three different places to detect pesticide residues. They are from a small farmer's market, a farmer's market and a supermarket (Renrenle supermarket). The three vegetables are Pak Choi, Chinese flowering cabbage, and Water spinach.<br><br>
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In modern society, agriculture develops with the progress of science and technology. Diseases caused by insects and pests are one of the most serious problems that restrict the development of agriculture. Therefore, in order to investigate the general public's understanding of insecticidal-killing methods and the methods’ impact on the public, the iGEM team of Shenzhen Senior High school released an online survey that reported on this. This online questionnaire was released on July 22, 2018, Beijing time and collected on July 29, 2018, Beijing time. There were 15 multiple questions and we have got 1,414 answers.
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Arriving at the lab, everyone appeared to be a little overwhelmed. At first glance, detecting residues emerged as a complicated matter.<br><br>
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<br><br>
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But when we really got started, we found that the method of quickly detecting pesticide residues is rather simple and convenient. Generally, there are two methods for detecting pesticide residues on vegetable leaves: one is to use a pesticide residue detector; the other is to employ test strips. We chose the second method, thus ordering test strips online and completing our pesticide residue test under the guidance of Deng Zihan's father.<br><br>
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Let’s have a close look at the data:<br><br>
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Let's take a look at the process of using those pesticide residue test strips:<br><br>
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For Question1, 63.72% of people answered that they basically have no idea of genetic sprays. And for Question15, 83.03% of people didn’t know that the genetic spray was on the market selling by now. Both indicated that genetic spray as a kind of product wasn’t known by most of the people, which remind us of the imperative need for the popularization of our product. To combine with the data in Question8, we could see that the most well-known method for pest-killing was “pesticide” ( answered by 87.2% of people), and the second was “light trap” ( answered by 50.21% of people). Therefore, using pesticide and light trap are the most popularized method.<br><br>
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Unpack the pesticide residue test strip, take out the eluent and the pesticide residue test strips<br>
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In fact, according to the survey data, it is not hard to find that people generally buy vegetables in vegetable markets (54.1%) and supermarkets (41.44%). In contrast, the reasons why people choose these places to buy vegetables are mainly because of convenience (46.46%) and freshness (25.74%). However, when people buy vegetables, their main concern is the freshness of vegetables (85.86%), while only a few people will pay attention to the information of pesticide residues（25.88%）. In the sixth and seventh question, 76.38% of people said they usually wouldn't buy vegetables by focusing on data of pesticide residues, but 74.68% of people said that hey knew the dangers of excessive pesticide residues, 74.54% of people thought it would lead to weaker immunity, 79.28% of people thought it could lead to chronic diseases, while 77.09% of people thought that it might cause cancer.....but there are also 61.03% of people thought that it would be bad for the environment.
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Drop 3-5 drops of eluent on one leaf and gently rub it with another leaf<br>
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55.59% of people said that they knew how to remove agricultural residues, 72.98% said they removed pesticide residues before cooking, and 62.02% had bought organic vegetables. This shows that most people have a basic understanding of the harm of agricultural residues and will remove them.
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Transfer the eluent onto the white tablet on the test strip and wait for 10 minutes<br>
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<br><br>
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Fold the test strip in half and press it tightly for 3 minutes<br>
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To sum up: People don't really know much about the use of genetic sprays, and traditional chemical pesticides are still the best-known way for them to kill insects and pests. They also have a basic understanding of pesticide residues and has a determined cognization and caution about food safety, but they do not seem to be willing to pay more time and money for it. According to our literal document, the harm caused by the use of chemical pesticides will be multi-directional. Therefore, we will conduct much more social investigations on chemical pesticides and some further study on genetic sprays, and finally compare the two products together in order to give the process of pest-killing a better choice.
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Unfold the strip and interpret the results based on the color change on the white tablet<br>
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Compare the strip to a blank control strip<br><br>
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<br><br><br><br><br>
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If the white tablet remains uncolored or turns slightly blue, the results are positive. A white color shows a strong positive result, indicating high pesticide residue. A light blue color shows a weak positive result, indicating low pesticide residue. A sky blue color is identical to the blank control strip, showing a negative result.<br><br>
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Our final results are carefully documented.<br><br>
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Although the test strips may not have the precision and accuracy of a pesticide residue detector, they are very convenient and practical as a measure of purchasing food in daily life.<br><br>
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Let’s have a look at our team members during testing: </p>
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<br> </body> </html>
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Latest revision as of 12:10, 14 October 2018

Title

Title

Survey of people about their opinions of chemical pesticide and its effect and insecticidal-genetic spray















Brief summary

In modern society, agriculture develops with the progress of science and technology. Diseases caused by insects and pests are one of the most serious problems that restrict the development of agriculture. Therefore, in order to investigate the general public's understanding of insecticidal-killing methods and the methods’ impact on the public, the iGEM team of Shenzhen Senior High school released an online survey that reported on this. This online questionnaire was released on July 22, 2018, Beijing time and collected on July 29, 2018, Beijing time. There were 15 multiple questions and we have got 1,414 answers.

Let’s have a close look at the data:

For Question1, 63.72% of people answered that they basically have no idea of genetic sprays. And for Question15, 83.03% of people didn’t know that the genetic spray was on the market selling by now. Both indicated that genetic spray as a kind of product wasn’t known by most of the people, which remind us of the imperative need for the popularization of our product. To combine with the data in Question8, we could see that the most well-known method for pest-killing was “pesticide” ( answered by 87.2% of people), and the second was “light trap” ( answered by 50.21% of people). Therefore, using pesticide and light trap are the most popularized method.

In fact, according to the survey data, it is not hard to find that people generally buy vegetables in vegetable markets (54.1%) and supermarkets (41.44%). In contrast, the reasons why people choose these places to buy vegetables are mainly because of convenience (46.46%) and freshness (25.74%). However, when people buy vegetables, their main concern is the freshness of vegetables (85.86%), while only a few people will pay attention to the information of pesticide residues（25.88%）. In the sixth and seventh question, 76.38% of people said they usually wouldn't buy vegetables by focusing on data of pesticide residues, but 74.68% of people said that hey knew the dangers of excessive pesticide residues, 74.54% of people thought it would lead to weaker immunity, 79.28% of people thought it could lead to chronic diseases, while 77.09% of people thought that it might cause cancer.....but there are also 61.03% of people thought that it would be bad for the environment. 55.59% of people said that they knew how to remove agricultural residues, 72.98% said they removed pesticide residues before cooking, and 62.02% had bought organic vegetables. This shows that most people have a basic understanding of the harm of agricultural residues and will remove them.

To sum up: People don't really know much about the use of genetic sprays, and traditional chemical pesticides are still the best-known way for them to kill insects and pests. They also have a basic understanding of pesticide residues and has a determined cognization and caution about food safety, but they do not seem to be willing to pay more time and money for it. According to our literal document, the harm caused by the use of chemical pesticides will be multi-directional. Therefore, we will conduct much more social investigations on chemical pesticides and some further study on genetic sprays, and finally compare the two products together in order to give the process of pest-killing a better choice.