Zhang Chong took Xu Li to show him what he was researching.
He saw a bottle of test tube in his hand. There was one-third of the green liquid in the test tube. Xu Li didn't know what it was.
"This is?"
"Principal, this is a biochemical information induction agent that I have developed these days, but now I have encountered a bottleneck."
Zhang Chong explained.
"Information inducer? What is this used for?"
Xu Li asked curiously.
"Kill mosquitoes."
Zhang replied calmly.
"Kill mosquitoes?" Xu Li was a little confused. He made this potion just to kill mosquitoes?
"Actually, the reason why I made this is to commemorate my lost youth."
When Xu Li heard this, a black line appeared on his forehead. What did this guy say?
Still lost youth?
Next, Zhang Chong will describe the reasons one by one.
"Actually, I had the idea to make this thing when I was in high school. I didn't have this idea before, but something changed me, and I embarked on the sinkhole road of biology."
Xu Li was a little curious, what could change this belief?
He continued to listen.
"Once, because several of our classes were going to go camping in the wild, we went to the deep mountains and old forests, but when I woke up the next day..."
Having said this, Zhang Chong changed his tone and his eyes showed anger.
Xu Li also noticed the change in his expression, but did not disturb him.
"When I woke up the next morning... I looked in the mirror and found that my face was covered in mosquito bites and swollen like a pig's head. When my classmates saw me like this, they all burst into laughter and couldn't help it.
Any idea where those damn mosquitoes got into the tent?
But it's not over yet... I went to the hospital and prescribed medicine and applied it for several days but it didn't kill the mosquito bites. My girlfriend often laughed at me because of this. I thought it was nothing at first, but she laughed at me too many times.
Later I had a big fight with her.
In the end, my girlfriend broke up with me because she disliked me for being such a mosquito-faced person.
From then on, I decided that mosquitoes were my life-long enemy. After filling out my application form for the college entrance examination, I resolutely took biology, just to rid the world of these hateful mosquitoes!"
At this point, Zhang Chong gritted his teeth.
Xu Li: "..."
He didn't know what to say at this moment.
He had heard many reasons for breaking up in relationships before, but the young man in front of him was actually caused by mosquitoes.
Is this because the dimensionality-reducing blow brought by mosquitoes to appearance directly leads to love problems?
It’s outrageous to think about.
After holding back his inner complaints, Xu Li coughed and said:
"Ahem, so you want to use the potion you developed to kill mosquitoes?"
"Yes." Zhang Chong replied decisively.
"But you have to know that there are many methods of killing mosquitoes on the market now, including many biochemical tests like this. Although they can effectively kill mosquitoes, they also have many shortcomings."
Xu Li frowned.
He knows a lot about mosquito control methods.
There are three main types.
The first is common physical mosquito killing. The simple and direct method is to give the mosquitoes a just trial with your hands/slippers. There are also electric mosquito swatters that allow mosquitoes to die quickly while enjoying the electric current and feeling comfortable all over. These are all physical methods.
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However, this method is more time-consuming and labor-intensive. After all, mosquitoes are not only small in size, but also very responsive. As long as a person moves a little, it will know the danger. If the hand speed is not enough, it will quickly escape. p>
The sensitivity of mosquitoes is related to their unique insect organs.
There are many whorls of sensory hairs distributed on the mosquito's pair of tentacles and three pairs of legs, and each sensory hair is densely arranged with round or oval pores.
Often in a dark environment where you can't see your fingers, mosquitoes can use this sensor to sense the carbon dioxide emitted by the human body in the air, react within 1‰ second, and fly to the blood-sucking target accurately and quickly.
What caused this change was nature's natural selection.
Each generation of mosquitoes has individuals with genetic mutations that are more responsive. In the struggle for survival for tens of millions of years, those who responded slowly died and those who responded quickly survived, prompting the species to speed up its response.
Moreover, after human society entered the industrial revolution, their evolution speed was faster, and they were no longer the natural evolution that only occurred in the natural environment before.
Xu Li recently heard that a university had recently launched a "nuclear mosquito killer", a ruthless strategy that would kill mosquitoes.
The main method is to use nuclear physical radiation to destroy the fertility of male mosquitoes.
However, such mosquito control is also costly and unsafe to some extent.
The second method is chemical mosquito repellent. As for why chemical mosquito repellent rather than mosquito killing?
This has something to do with the chemicals that repel mosquitoes.
Nowadays, the most common methods of repelling mosquitoes at home are mosquito coils and insecticides.
These repellents also contain chemicals that interfere with or repel mosquitoes.
The first is what we often call pyrethrins. This is a broad-spectrum insecticide that can control a variety of pests. In its early years, it was a chemical substance extracted from pyrethrum by foreign chemists. Its insecticidal poison
The force is more than 10 times higher than that of the older generation of insecticides, and it can disrupt the normal physiology of insect nerves and promote their death.
Although it is harmless to the environment and humans, it is highly toxic to fish and harmful to some beneficial insects. Long-term repeated use can also lead to insecticide resistance in pests.
In addition, N-diethyl-3-methylbenzamide, commonly known as DEET, is currently the most widely used mosquito repellent chemical in the world.
It has been described as a "mosquito fog" that can cover up 1-octen-3-ol in human sweat and breath, making it difficult for mosquitoes to find the right direction.
Then there are two types of mosquito repellent substances, such as 1-methylpropoxycarbonyl)-2-(2-hydroxyethyl)piperidine and butylacetamidoethylpropionate (called Immonin in China).
In addition to causing little environmental pollution, it also has little irritation to the skin and is generally considered safe.
But it also has disadvantages. The former is not recommended for families with babies or pregnant women, and the latter is effective for a relatively short time.
The last one is biological mosquito killing.
Common biological mosquito control is to find the natural enemies of mosquitoes, such as frogs, dragonflies, spiders, flytraps, etc., to kill mosquitoes. However, this method is obviously very traditional and natural, and cannot quickly eliminate large-scale mosquitoes. p>
Moreover, if these natural enemies want to eliminate mosquitoes, the first step is to capture mosquitoes, which requires waiting for the opportunity, and the time is also uncertain.
There is also the method of cultivating bacteria to parasitize mosquitoes and make the mosquitoes infected with infertility.
A similar bacteria is called Wolbachia, which is a type of parasitic bacteria that is widespread in nature and can infect arthropods.
However, this bacteria mainly targets male mosquitoes. When male mosquitoes are infected with Wolbachia, their tadpoles will be contaminated by the toxins released by this bacteria, so that they will not be able to produce offspring.
In addition, there is the gene editing method that people often talk about to eliminate mosquitoes.
It means that a specific gene is inserted into the mosquito genome. This gene will not cause abnormalities in the parent mosquito, but it will disrupt the secretion of a certain enzyme that regulates protein synthesis in the offspring female mosquitoes, causing the larvae to die early.
However, this method at the genetic level has been highly controversial, because if this technology is defective, it may cause unknown ecological disasters.
In short, in order to reasonably eliminate mosquitoes, humans have resorted to all possible means. Scientists have even racked their brains and focused on how to make mosquitoes infertile.
Because traditional methods cannot cure the root cause, as long as the mosquito has no offspring, it is equivalent to taking away the hope of the mosquito.
However, these methods have their own shortcomings, so most scientists are studying how to maximize their strengths and avoid their weaknesses.