bonanza

Chapter 870 Backlash
The larger the current, the more turns the coil has, and the greater the magnetic field superimposed and synthesized inside the coil.

So an NMR machine using superconducting magnets is stronger than a normally conducting NMR machine using copper as a wire.

In addition to being affected by the magnitude of the current, the magnetic strength is also affected by the number of turns of the coil.

According to the routine, it is enough for everyone to pile up coils desperately at this time, but the reality is not that simple!
The larger the aperture of the MRI machine, the harder it is to distribute the magnetic force evenly, and the poorer the image quality.

At present, the standard aperture of the MRI machine is 60 centimeters, if it is bigger, it will have to be redesigned!

In the case of a certain volume, if you want more coil turns, you have to make the wire as thin as possible.

In the current MRI machine, the diameter of the niobium-titanium alloy wire has been reduced to only a dozen microns, or even a few microns, which is thinner than a hair!

"Bang!" The drawing machine shook suddenly.

Immediately, someone yelled, "Shut down!"

Vice President Wang stepped forward to take a look at the broken wire, and couldn't help sighing.

If it's just high intensity, there are still ways to solve it.

However, this material is too unstable, and it will expand if handled carelessly, and its strength, melting point, and plasticity will become no different from ordinary nickel-iron alloys.

However, the force of the drawing process is too complicated and very difficult to control.

"Director, why do we have to draw this material?" A young researcher wearing glasses asked the director of the Materials Research Center.

"How do you make wires without drawing them?" the director of the Materials Research Center asked without looking back.

"I have seen the grains of this material under an electron microscope, and they are already very small. I think this is an important reason why this metal has such high strength and hardness, and such good plasticity and toughness!" said the young researcher.

"I understand this!" The director of the Materials Research Center frowned.

"So why don't we change our thinking, such as making a thin-walled cylinder and then doing spiral cutting? Now the cutting width of the water-guided laser can be controlled at about 20 microns, and the cutting accuracy can reach about 5 microns. Under ideal conditions, even the cylinder The diameter of the wire is only ten centimeters, the length is only one meter, and it can also cut thousands of meters of wire. Then we cold-roll the material to make it partially expand, and finally heat-treat it to remove the expanded part, so that the diameter of the wire can be further reduced... "

The director of the Materials Research Center listened and felt that this method seemed a bit reliable, "Come with me! Say what you just said again!"

……

On the runway of Shanghai Airport, two more Il-76s landed.

Not long after, there were hundreds of anxious people in the airport.

In the team, an old man with a gauze wrapped around his head looked up at the sky. In a daze, the old man felt that this scene was somewhat familiar.

It should have been more than 60 years ago, and it was almost this season. He followed his parents, brother, and sister, and left the city on a boat.

He still clearly remembers that when he begged his mother to go home, he didn't want to take the boat.

But his mother told him, "It's not our home anymore!"

That time, they collectively returned to their hometown from Shanghai by boat...

No, to be precise, this is his birthplace.

The old man suddenly felt that his head hurt even worse!
"No. [-] XX Road, isn't it going to Hong Kong? Why did you send us here..." the old man yelled dissatisfied.

"Father, calm down!" A middle-aged man hurried over to dissuade the old man.

However, this shout still attracted the attention of all around.

"Grass, where is the little XX!" Someone shouted.

The crowd was a little restless!

On the top floor of Dongsheng Building, Director Li hastily pushed open the door of Yang Dongsheng's office.

"The last two Il-76s have returned from the disaster area!" Director Li took out a form, "This is the expert registration form brought back!"

Yang Dongsheng took it over and looked at it, then nodded.

But when he raised his face, he saw Director Li's hesitant expression, "What's the matter?"

"Something went wrong!" Director Li briefly described the situation at that time.

"Bastard!" Yang Dongsheng didn't expect that there was an XX among them, but now the old guy is still useful, so he can't be attacked for the time being. "Let the Internet Public Opinion Office pay close attention to the trend of public opinion and prepare for public relations!"

"Should I say hello to the airport and let them go VIP?" Director Li asked.

"No!" Yang Dongsheng waved his hand, "We can't just spoil them from the beginning!"

Director Li led the order to go out.

Yang Dongsheng still felt a little uneasy. He turned on the computer and quickly browsed the webpage.

Fortunately, this matter is not on the Internet, which has attracted too much attention.

It was a piece of news that caught Yang Dongsheng's attention—there were multiple cases of Ebola infection in the United States.

It is not difficult to prevent Ebola, and the very few cases found in Hong Kong have been brought under control.

How did the United States spread the word?
After in-depth investigation, it was discovered that many of these people had undergone organ transplants, or their close relatives had undergone organ transplants, and the transplanted organs all came from South Asia.

South Asia is the region with the most rampant organ trade in the world.

On the one hand because of poverty, on the other hand because of race.

Although South Asians look black, they have a large proportion of Caucasian ancestry.

Some light-skinned people in the north look no different from Caucasians.

All over the world, there are many people who need organ transplants every year, but cannot find suitable organs.

Due to the similar race, the organs of South Asians are more likely to be successfully matched with the main ethnic groups in Europe and America, so a black industrial chain from South Asia to Europe and the United States was born.

There are many expensive doctors in Europe and the United States who are good at organ transplants, and they especially like to go to South Asia.

After they arrive in South Asia, they will donate some medical equipment to the local area and give free medical examinations to people in poor areas.

Its purpose is to find suitable organs for their clients.

In many parts of South Asia, selling kidneys has become a routine business.

It is not surprising that some people even simply disappeared.

After all, not every organ in the human body has two like kidneys.

But they didn't expect that they would be backlashed this time.

During this period of time, although South Asia refused to admit it, all kinds of information proved that Ebola was raging again there.

Looking at the raging epidemic, Yang Dongsheng couldn't help but think of the project that Dongsheng Heavy Industry was working on.

As the aging problem in our country becomes more and more serious, the demand for equipment such as nuclear magnetic resonance machines will reach hundreds of thousands in the future.

According to the current price of tens of millions of yuan for a nuclear magnetic resonance machine above 1.5 tesla, the market size of nuclear magnetic resonance machines alone will reach trillions in the future.

With the usual style of international giants such as General Electric, Philips, and Siemens.

At that time, we will have to pay hundreds of billions of dollars every year for the service fee alone.

(End of this chapter)