my scientific age

Where is Chapter 141? !

After more than a minute, the nitrocellulose and nitroglycerin in the beaker were completely mixed, showing a gray paste shape. The extremely sensitive nitroglycerin was no longer so sensitive. Yu Hua observed that the time was ripe, and then added the extremely expensive and rare medium Fixed dose, the amount added is not much.

The scientific name of the neutralizing agent is diethyldiphenyl urea, which is currently in a state of pure import in China, and the domestic chemical industry base is not enough to produce it.

This is an important component in double-base drugs, which can eliminate and reduce the production of acidic oxidative decomposition products, prevent the decomposition of nitrate itself, thereby improving chemical stability and prolonging storage time. Its use is basically the same as that of diphenylamine, and it is strictly controlled by the government. One of the strategic materials.

Just such a small bottle of 50 mg medium dose cost Yu Hua a total of [-] yuan, which is equivalent to [-] yuan for future generations.

If calculated by the catty, the price of a catty of the middle dose is 830 yuan.

"This price may not be a big deal for Brother Zhongzheng, but it is still quite expensive for the Eighth Route Army. Even if Kodak-type double-base compulsives with poor comprehensive performance are used, 1% of the neutralizing agent is needed. Overcome the synthesis technology of diethyl diphenyl urea and dimethyl diphenyl urea." Yu Hua added the neutralizing agent and stirred, thinking about the neutralizing agent in his mind.

Laboratory preparation and industrial production are completely two concepts.

In order to produce double-base pressing powder and double-base gunpowder on a large scale, the synthesis technology of neutralizing agent must be completed.

Double-based powders are divided into gunpowder and rocket propellant. The latter is ignored for the time being. The former is divided into mortar powder and artillery powder. The two types of gunpowder are divided into Barista type and Kodak type according to different production processes.

Ba-type double-based drugs use a solvent-free process, and Kodak-type use a volatile solvent process. Later generations mainly use Ba-type double-base drugs, with a proportion of 2% for the neutralizer and 1% for the Kodak-type.

But no matter which type of double-base compulsive, a neutralizing agent must be added in the production, and diphenylamine as a gun powder stabilizer is not suitable for double-base drugs in the field of gunpowder due to its weak alkalinity.

The corresponding proportion of the neutralizing agent is added to the beaker, and a chemical reaction occurs immediately, which dissolves in the nitroglycerin, continuously penetrates into the nitrocellulose, and is tightly adhered and combined, which is extremely firm.

Subsequently, Yu Hua added a certain proportion of Vaseline for stirring.

As the vaseline was fused into the nitrocellulose and nitroglycerin, a light yellow pulpy substance appeared soon. If nothing else, this was a qualified quasi-finished Ba-type double-based compulsive drug.

"It shouldn't be a problem. Let's stop here today. The Ba-type double-base press is ready, followed by the Kodak-type double-base press, Ba-type gunpowder and Kodak-type gunpowder. After finishing these, and the synthesis technology of the neutralizer, it is called In a real sense, the system development of double-based drug technology has been completed..." Yu Hua carefully observed the pulpy substance in the beaker, confirmed that it was qualified, raised his right hand to check the time, it was already five o'clock in the afternoon, and turned his eyes to Xu Rui on the other side .

At this time, Xu Rui, who was still preparing the second batch of single-based medicine, had reached the final step. He was cautious and focused. He added the A-grade nitrocellulose into the beaker, and then kept stirring. The operation method was slightly blunt, but it was better than the standard.

After observing for a while, nothing went wrong, Yu Hua didn't bother Xu Rui, and got busy on his own.

Record the detailed experimental steps and process of the Ba-type double-base compulsive drug. The gunpowder is extruded and granulated, sent to the kitchen for drying, and the extremely dangerous nitroglycerin is sent back to its original place, waiting for the next double-based drug to be prepared and used.

After finishing the work, good news came from Xu Rui, the second single-based propellant was successfully prepared.

"Sir, Ruizi is ready." Xu Rui pushed away, wiped the sweat from his forehead, and said to Yu Hua.

There was a hint of joy and excitement in the words.

This is the joy of mastering a technology.

A family with millions of dollars is worse than a skill. Xu Rui understands what the technology he has mastered means, and understands how precious and hard-won it is.

How could he have learned such a formidable skill without Mr.
This is a new type of gunpowder!
"Good job, let's dry the granulation first." Yu Hua smiled and reminded.

Xu Rui, who was full of smiles, nodded quickly, calmed down, picked up the metal screen, put the quasi-finished single-base medicine on it, squeezed and cut it into granules, and then fired the wet single-base medicine with more than a kilogram of granules Medicine, sent to the kitchen.

Yu Hua waited for Xu Rui to come out of the kitchen after finishing his work, and then said: "Ruizi, I'm here today, I'll go to Tsinghua Park first, and you stay in the laboratory to take care of the batch of propellants. You must pay attention to safety. If you don't understand Just ask, don’t pretend to understand if you don’t understand.”

Today is Friday, after a busy afternoon, he still has to go to Tsinghua University for class. He has already started mathematical analysis, and the thinking finite element analysis system is close at hand, so there is no room for delay.

"Ruizi understands, and must guard the laboratory." Xu Rui nodded.

Yu Hua smiled, stopped talking, put his schoolbag on his back, turned and left the chemistry laboratory, and embarked on the road to Tsinghua University.

In the afternoon, the sun sets.

The sky is full of red clouds in the distance, winter is gone and spring is gone, and the scorching summer is coming.

Today, there are 89 days left until July [-]th.

……

Tianjin, the northern outskirts of the city.

Two young men dressed as ordinary people were walking along the small path between the mountains and forests, their steps were steady and fast, their bodies were agile, their waists were bulging, and they had hidden weapons.

Not far away, there is a railway that continues to stretch into the distance—Jinshan Railway.

The Jinshan Railway started from the Tangxu Railway, which is the section from Tianjin City to Shanhaiguan, with a length of about [-] kilometers. This is the only railway line north of Tianjin City and is actually controlled by the Japanese army.

"Mr. Li, Tangshan is another forty miles away. We have walked all the way and found no traces of large-scale Japanese military activities." On the way, a young man was sweating on his forehead, and looked at the place not far away. The iconic landform, said to Chief Li who was in charge of this operation.

"Forty miles..."

Li Ping frowned, his eyes were serious, and he instinctively glanced at the Jinshan railway line on the right.

Along the way, starting from Tianjin City and along the Jinshan Railway, there was no trace of any large-scale Japanese military activities. No matter whether it was marching or taking a train, there were no Japanese regiment-level troops.

Now, two full days have passed since April 4th.

what happened?

Could it be that the information deciphering went wrong?
Li Ping was puzzled. Since the last time he left Tsinghua University, the Blue Shirts Secret Service immediately carried out the deciphering work according to the mathematical model and calculation formula of the red dense matrix, and deciphered a large number of high-value Japanese military telegrams.

However, in order to verify the authenticity of these messages and the effect of deciphering the red secrets, the Secret Service specially deployed control and fortifications in the north of Tianjin City based on the first piece of information with the highest value, and strengthened the surveillance and observation of the Japanese troops, trying to find the third division. The figure of the sixth wing of the regiment.

However, two days later, the advance team of the Great East Asian War did not appear.

The situation seemed particularly strange.

Was it a mistake in the red code deciphering data, or did the Japanese know that the password system had been cracked and responded immediately?

do not know.

"Look again, and move on." Li Ping, the garrison, took a deep breath, kept his emotions calm, and responded with clear eyes.

He chose to believe in Professor Hua Luogeng and classmate Yu!
As the main road from Tianjin to Shanhaiguan, the Jinshan Railway is the only choice for the Japanese to transport troops on a large scale. The deployment of more than 3000 troops at the regiment level requires secret arrival. .

Where is the Sixth Wing? !
It's more than 5000 more, and it's a few hundred short of the [-] in the third chapter. I'll make it up tomorrow and go to sleep.

(End of this chapter)