Chapter 1308

"I'm not going to solve a case." Yang Rui follows Cao DA in a low voice.

Cao Da said with a smile: "director Yang..."

"I'd better call it Yang Rui. I'm not an official as a director." Yang ruidao.

Cao Da nodded and said, "Yang Rui, you don't need to solve the case. We just say that you have new technology now 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 each other?" Yang Rui raised his eyebrows a little.

Cao Da laughed and said, "I'm going to introduce you as the Chinese ambassador to Sweden. What can he do if he thinks it's troublesome?"

Cao Da looked at Yang Rui and said, "you don't have much time. I don't think you have time to renew your relationship. It's better to be more straightforward. What's more, it's not necessary to let their director in charge of the matter and introduce a subordinate to you. "

Yang Rui looked in the direction of Cao Da's direction and saw several guys in police uniforms.

Seeing that Yang Rui was a little relaxed, Cao Da said, "PCR is just like fingerprints, isn't it? Is it more accurate than fingerprints? What's the percentage similarity? "

He needs to know some relevant information in advance, but he doesn't need to know the specific content in detail. What happened at the dinner party is just like a wine shop. It's just the beginning.

Yang Rui pondered over CaO Da's question and said: "PCR technology has popularized DNA detection. If there are appropriate biological clues, I mean all kinds of body fluids and hairs, they are much more accurate than fingerprints."

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

"A million times?" Yang Rui shrugged.

Until later generations, fingerprint identification still relies on artificial judgment, and the probability of criminals leaving full fingerprints is relatively low. DNA is not the same, as long as it is not strongly contaminated, the accuracy of DNA is very high, and the repetition rate is lower.

Cao Da was stunned and repeated: "a million times as high?"

"The development of biological technology is astronomical." Yang Rui paused for a moment and said, "well, if there is a drop of sweat on the ground, give me a matching instrument, and collect information from all the people in the room once again, I can know whose sweat it is."

What Yang Rui said may be the basic knowledge that future generations of children all know, but to Cao Da, it sounds like a fable.

Cao Da took a serious look at Yang Rui and found that he didn't talk big. He couldn't help whispering: "really so powerful?"

"Other Americans have landed on the moon. It's nothing if we can detect the DNA of a drop of sweat." Yang Rui is modest and proud.

In fact, the uniqueness of DNA, or its various characteristics, was quite clear as early as the 1950s and 1960s. However, DNA testing used in judicial expertise didn't appear until the late 1980s and early 1990s. The key is to solve the problem of PCR and DNA consumption.

Before the invention of PCR, what you need to detect biological DNA is not a drop of sweat, but a tube of blood. Even a tube of blood is not enough. You have to reserve a large amount of substances containing DNA to stir up enough amount for detection.

PCR PCR is a non-destructive amplification process, as long as there is a DNA strand, it can double it in a very short time, one unit time becomes two times, two units time becomes four times, and then eight times, 16 times, 32 times, 64 times... And the number of cycles of PCR is usually 25 to 30 times.

25 cycles will produce 33.55 million times the original amount of DNA, and 30 cycles will produce 1 billion times the original amount, 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 you twist a person, you have to extract all the DNA. It's better to let PCR work 24 hours more.

It can be said that with or without PCR instrument, the research methods of human genetics are quite different, which is the embodiment of proper generation difference.

PCR There is no problem in winning the Nobel Prize.

From Yang Rui's point of view, even without operation, PCR will surely win the Nobel Prize, because its value is also circular amplification. It will become stronger and stronger in the 1990s, the 21st century and the 10th century. The reason why han Chunyu's fake achievement can be called Nobel Prize is that it shows a more efficient gene tool, and PCR is the super efficient gene tool of Yuanzu level.

With Yang Rui's age, he can definitely wait until he wins the Nobel Prize in his lifetime. If not in the 1980s, it will be in the 1990s. If there is no hope in the 1990s, it will be another decade, or another decade. As long as people are alive, the hope of Nobel Prize will grow with each passing day.However, Yang Rui is not willing to wait.

Whether there is a Nobel prize or not, the scientific research treatment and political treatment are very different.

Now in China, Yang Rui has to describe his work and introduce his achievements over and over again, no matter whether he wants funds or strives for staffing. But if there is a Nobel Prize, it will be a completely different world. It's no joke that funds and staffing come running with legs.

In theory, Nobel Prize winners who fight in the front line can get a steady stream of resource support, which is exactly what Yang Rui yearns for.

In contrast, what about earning 100 billion? It's not about thinking about reinvestment every day. At the end of the day, it's not about considering wills and donations. You have to devote your little time to the foundation before you die.

Looking at Yang Rui's confident expression, Ambassador Cao said with a smile, "I'll leave it to you next."

As they spoke, they came to the Stockholm police chief.

"Welcome to the Chinese Embassy, director Sherwood." Cao Da knew the director's information from his assistant for a long time. In a few words, he introduced Yang Rui to the other party.

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

"When I came to Sweden, it was said that Swedes don't like greetings. Let me be more direct when I speak." Cao Da, a stout but long sleeve dancer, turned to him in the simplest way and said, "director Sherwood, Mr. Yang Rui wants to try his new technology in Sweden. Would you like to hear about it?"

"New technology?" Sherwood's face was red, and in the twinkling of an eye he drank another whisky.

Yang Rui took the conversation and said in English: "I want to use PCR in criminal investigation. It's a very good technology. It's easier to identify suspects than fingerprints. However, this technology has a certain cost and is not suitable for promotion in China. I want to have a try in Europe. "

Swedes' English level is very good, especially the government officials, basically can use English skillfully.

Yang Rui's words export, Cao DA can't help but some anxious, how to do a good job in the news, and talk about money.

He did not understand Yang Rui's scruples.

If it's just for the sake of making a big news and making money at a loss, the academic circles may not have any opinion on him. It's better to make a simple business.

Moreover, Yang Rui believes that the value of PCR can attract Sherwood, if he is not intoxicated by alcohol.

Then, Yang Rui used simple sentences to describe the use and significance of PCR, and gave an example: "for example, when a rape case happened on the train, and the victim could not identify the murderer, we can collect DNA from all the men in the train, compare it with the police, and directly identify the murderer."

Cao Da was nervous during the audition. Is it really good for you to talk about this when you meet?

Yang Rui can't see Cao Da's expression.

According to his experience these days, Swedes are not taboo to talk about sex. Just like their TV stations, Swedes are famous for talking about sex in public. Their openness often makes Americans feel ashamed and scoff, let alone their professional attitude when they are talking about their majors.

Director Sherwood didn't find Yang Rui's remarks problematic. Instead, he aroused interest and said, "I see what you mean. Can you confirm which one of a group of suspects?"

"In the case of biological evidence, yes." Yang Rui explained his theory of a drop of sweat as he told Cao da.

The Swedes have always liked new technologies, just as they made American products into disposable products. They spared no effort in the development of new technologies, so that they could build a country that could independently design and manufacture the latest fighter planes with the scale of 9 million people.

Director Sherwood is a little interested in Yang Rui's technology. This is partly because of Yang Rui's explanation. The other half is that he has heard about Yang Rui's reputation. When he comes to the Chinese embassy for a dinner, he will naturally hear about the celebrities here.

Sherwood half curious asked: "if there is a drop of blood, you can also find out who it is, is that the meaning?"

"That's right." Yang Rui affirmed: "any tiny biological trace can."

"Forgive me, if I'm right, can hair be?"

"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 had a murder in a nearby town. Our detectives searched the whole town, but there was no clue. Then there were two more cases, and there was no result...""You're talking about the Marler case." The people standing nearby immediately called out their names.

Sherwood nodded and said, "we have used clothes and weapons. I think hair can be found on them, but I'm afraid it won't be too much."

"The Muller case is three murders in a row."

"Three people died in a small town in two months. When we first heard about it, we were scared."

"I heard it was made by people in small towns."

When the word "Marler" appeared, people around them were all interested.

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

Yang Rui also perked up and asked, "is the murderer trapped in a small town?"

"Yes, Muller is a lonely town. There is only one way to Stockholm. The residents of the town are very fixed and United. You know, this is a typical Swedish town. So, when people realize that there is a murderer in the town, everyone feels bad." Director Sherwood looked at the people around him and said with a pause: "because of this, the case of Muller has attracted the attention of the whole country in Sweden. If your technology can find a clue, it would be better."

On the snowy land, a small town far 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 technology, I can persuade Huarui to do the test at the cost price."

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

But Sherwood didn't like it and asked, "how much is the budget?"

"About 3000 kroner per test." Yang Rui's ability to offer this price depends on the fact that his patent is high temperature resistant polymerase.

Even so, Cao Da was shocked by the price. Even in a sparsely populated Nordic Town, there must be hundreds of people. A town that can kill three people doesn't sound like too few.

Sherwood is a calculation, said: "a person to do a test, Marle Town, there are less than 1000 people, is 3 million kronor, this calculation?"

"Almost. For accuracy, some people will do it twice, but the total will not increase too much."

Sherwood thought, "that sounds good."

Yang Rui guessed that he probably didn't want to make a decision at the banquet, so he took advantage of the heat and said, "director Sherwood, can we make an appointment and let me go to the police station to explain it to you personally?"

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