Rebirth of the God-level Xueba

"I don't know how to solve the case." Yang Rui followed Cao Da and explained in a low voice.

Cao Da smiled and said, "Director Yang..."

"Let's call it Yang Rui. I'm not an official as the director." Yang Rui said.

Cao Da nodded and said, "Then Yang Rui, you don't need to know how to solve the case. We just say that you have new technology and want to apply it. We can discuss it and try to find a case that suits you."

"Will it be too much trouble for the other party?" Yang Rui raised his eyebrows slightly.

Cao Da smiled and said, "I'm here to introduce you as the Chinese ambassador to Sweden, so what if he finds it troublesome."

Cao Da looked at Yang Rui, and said, "You don't have much time. I guess you don't have time to reconnect. It's better to just do it better. Besides, it's not necessary to let their chief be in charge of this matter and introduce a subordinate." Give it to you, that's enough."

Yang Rui looked in the direction Cao Da pointed out, and he saw several guys in police uniforms.

Cao Da saw that Yang Rui was a little more relaxed, and said again: "The PCR you mentioned is like a fingerprint, isn't it? Is it more accurate than a fingerprint? How many percent similar?"

He needs to know some relevant information in advance, but he doesn't need to know the details in detail. The dinner party is like a wine shop, just a beginning.

Yang Rui thought about Cao Da's question for a while, and said: "PCR technology is to popularize DNA testing. If it is more accurate than fingerprints, if there are suitable biological clues, I mean various body fluids and hairs. Much more accurate than fingerprints."

"It's better to have a measurement. Foreigners believe in this."

"A million times?" Yang Rui shrugged.

The identification of fingerprints is still half dependent on manual judgment until later generations, and the probability of criminals leaving full fingerprints is relatively low. DNA is different. As long as it is not strongly polluted, the accuracy of DNA is extremely high and the repetition rate is lower.

Cao Da was stunned for a moment, and repeated: "One million times as high?"

"Biological technology has developed to a later stage, and it is astronomical." Yang Rui paused and said: "Let's put it this way, if there is a drop of sweat on the ground, give me the matching equipment,

Collect information from everyone in the room again, and I'll know whose sweat it is. "

What Yang Rui said may be the basic knowledge that children of later generations will know, but to Cao Da, it is like a fairy tale.

Cao Da took a serious look at Yang Rui, and found that he didn't seem to be boasting, so he couldn't help but whispered: "Is it really that powerful?"

"All the Americans have landed on the moon, and it is nothing if we can detect the DNA of a drop of sweat." Yang Rui is both humble and proud.

In fact, the uniqueness of DNA, or its various characteristics, were made clear as early as the 1950s and 1960s. However, the use of DNA testing for forensic identification did not appear until the late 1980s and early 1990s. The key lies in solving the problem. PCR solves the problem of the amount of DNA used.

Before the invention of PCR, what you needed to detect the DNA of living beings was not a drop of sweat, but a tube of blood, and even a tube of blood was not enough. You had to reserve a large amount of DNA-containing substances to mix up enough for detection.

PCR is different. PCR is a non-destructive amplification process. As long as there is one DNA strand, it can double it in a very short time. One unit of time doubles, and two units of time quadruples. , followed by 8 times, 16 times, 32 times, 64 times... and the usual number of cycles of PCR is 25 to 30 times.

The amount of DNA obtained by circulating 25 times will be 33.55 million times the original amount, and the amount obtained by circulating 30 times will be 1 billion times, which is a huge amount that a tube of blood or a kidney cannot provide.

In fact, the total number of somatic cells in the human body is less than 100 trillion, which is only the level of 50 PCR cycles. In other words, if a person is strangled and all the DNA material has to be extracted, it is not as good as allowing PCR to work for 24 hours longer.

It can be said that the research method of human genetics is completely different with or without a PCR machine, which is a manifestation of a proper generation gap.

The invention of PCR won the Nobel Prize without any problem.

From the point of view of future generations, Yang Rui, even without operation, PCR will definitely win the Nobel Prize, because its value is also cyclically amplified, and it will become stronger and stronger in the 90s, 21st century, and 10s. The reason why Han Chunyu's pseudo-results can be called Nobel Prize-level is because it shows a more efficient genetic tool, and PCR is the ancestor-level ultra-efficient genetic tool.

At Yang Rui's age, he will definitely be able to wait until PCR to win the Nobel Prize in his lifetime. If it doesn't work in the 1980s, it will be in the 90s. If there is no hope in the 90s, it will be another ten years, or another ten years. As long as people are alive, the hope of the Nobel Prize will increase day by day.

However, Yang Rui was unwilling to wait.

There is a huge difference between scientific research treatment and political treatment with or without the Nobel Prize.

Yang Rui is now in China, no matter whether he needs funds or staffing, he has to describe his work and introduce his achievements over and over again, but if he wins the Nobel Prize, it will be a completely different world. Running over on legs is no joke.

Theoretically, the Nobel laureates fighting on the front line can get a steady stream of resource support, and this is exactly what Yang Rui longs for.

In contrast, earning 100 billion is not a matter of thinking about reinvestment every day. In the end, you have to consider wills and donations, and you have to dedicate your little time to the foundation before you die.

Ambassador Cao looked at Yang Rui's confident expression, couldn't help smiling, and said, "I'll leave it to you."

While talking, the two had already come to the Stockholm police chief.

"Director Sherwood, welcome to the Chinese embassy." Cao Da had already known the director's information from his assistant, and introduced Yang Rui to him in a few words.

Now is the period when China and Sweden cooperate the most. The indifference of the Swedes is accompanied by politeness. Director Sherwood also nodded to Yang Rui politely.

"When I came to Sweden, I heard people say that the Swedes don't like small talk, so I should be more direct when I speak." Cao Da, who is thick and well-dressed, turned to him in the simplest way: "Director Sherwood, Mr. Yang Rui hopes to try his new technology in Sweden, would you like to hear it?"

"New technology?" Sherwood's cheeks were flushed, and he drank another glass of whiskey in the blink of an eye.

Yang Rui took up the conversation and said in English: "I want to use PCR in criminal investigations. This is a very useful technology that can identify suspects more easily than fingerprints. However, this technology has a certain cost. It is not yet suitable for promotion in China, and I want to try it in Europe."

The English proficiency of the Swedes is very good, especially government officials, who can basically use English proficiently.

When Yang Rui's words came out, Cao Da couldn't help but feel a little anxious, how could he be doing a good job of making news, and then talked about money again.

But he didn't understand Yang Rui's scruples.

If it is just to make a big news and make money at a loss, the academic circle may think of him, it is better to make a simple business.

Moreover, Yang Rui believed that the value of PCR would be able to attract Sherwood, if he hadn't been dazzled by alcohol.

Immediately afterwards, Yang Rui used as simple a sentence as possible to describe the use and significance of PCR, and emphatically exemplified: "For example, if a rape case happened on the train, and the victim could not identify the murderer, we can test all males on the train. Collecting DNA, comparing it with DNA, can directly confirm the murderer."

Cao Da was nervous while listening, is it really okay for you to talk about this when you meet?

Yang Rui just pretended not to see Cao Da's expression.

Judging from his experience these days, the Swedes are not shy about talking about sex, just like their TV stations, the Swedes are notorious for talking about sex in public, and their openness often makes Americans feel ashamed and sneer at it , not to mention their professional attitude when talking about professionalism.

Director Sherwood didn't think there was a problem with what Yang Rui said, but instead aroused his interest, and said, "I understand what you mean. Among the group of suspects, can you determine which one it is?"

"In the case of biological traces, yes." Yang Rui explained his theory of a drop of sweat as if he had told Cao Da.

The Swedes have always liked new technologies, just as they turned American products into one-off products. They spared no effort in the development of new technologies, which is why they were able to build a company with a scale of 9 million people that can independently design and manufacture the latest fighter jets. nation.

Director Sherwood was a little concerned about the technology Yang Rui said, half of it was because of Yang Rui's explanation, and the other half was because he had heard of Yang Rui's reputation. When he came to the Chinese embassy for a dinner, he would naturally hear about the celebrities here.

Director Sherwood asked half curiously: "If there is a drop of blood, you can also check whose it is. Is that what you mean?"

"That's right." Yang Rui said affirmatively, "Any tiny biological trace will do."

"Forgive me, if my guess is correct, can the hair be the same?"

"That's right."

"In this case, we really have a case that may be able to use your new technology." Director Sherwood was a little concerned, and said: "We have a murder case in a nearby town, and our detectives have searched for it." The whole town, but there was still no clue, and then two more cases happened, and there was no result..."

"You're talking about the Marle case." The person standing next to him called out his name immediately.

Director Sherwood nodded, and said, "We have the clothes and weapons used by the murderer. I think we can find hairs on them, but the number may not be too many."

"The Marle case is three consecutive homicides."

"When we first heard about three people dying in a small town in two months, we were horrified."

"I heard that people in the town did it."

When the word "Marle" appeared, everyone around became interested.

Obviously, for the Swedes at this time, this is a famous case.

Yang Rui also cheered up and asked, "Is the murderer locked in the small town?"

"Yes, Marle is a lonely town with only one passage to Stockholm. The residents of the town are very stable and united. You know, this is a typical Swedish town. So, when everyone realizes that there is a murderer in the town Everyone felt uncomfortable when the incident happened." Director Sherwood looked at the people around him, paused and said, "The Marle case has attracted the attention of the whole of Sweden. If your technology can find clues, that would be great. gone."

On the snow-capped land, the small town away from the world is not only a typical Swedish town, but also a typical Nordic town.

Yang Rui nodded without hesitation and said, "Director Sherwood, if you are willing to try new technologies, I can persuade Huarui to do testing at cost."

Cao Dalian coughed twice, and said in Chinese: "Yang Rui, don't talk about money at this time."

Sherwood didn't care, and asked, "How much budget do you need?"

"Every test is about 3,000 crowns." Yang Rui's ability to offer this price depends on his patented high-temperature-resistant polymerase.

Even so, Cao Da was taken aback by the price. Even a sparsely populated Nordic town must have at least several hundred people. A small town where three people can die doesn't sound like too few people.

Sherwood did some calculations, and said, "One test per person, there are less than 1,000 people in Marle Town, and it's 3 million crowns. Is this the calculation?"

"Basically, some people do it twice for accuracy, but the total doesn't add much."

Sherwood pondered: "Sounds good."

Yang Rui guessed that he might not want to decide the matter at the banquet, so he took the heat and said: "Director Sherwood, can we make an appointment so that I can go to the police station and explain to you in person."

"Oh, that's a good idea." Hearing that he could try it, Sherwood immediately agreed.

? ? 3590 words, that's how long it is!

?

????