It's late at night and people are not asleep.

In Kunming, Yunnan, thousands of miles away, the lights are still on in a simple dormitory at Southwest Associated University.

The oil lamp was dim, but Mr. Zhang Dayu, who was the director of the Department of Chemical Engineering of Southwest Associated University and also a researcher at the Institute of Chemistry of the Central Academy of Research, was still studying hard.

This is a letter sent from Yongcheng. With the letter, there are more than a dozen pages of introduction materials for low-temperature dry distillation of coal to extract gasoline. Mr. Zhang Dayu was addicted to these materials, as if a bright window suddenly opened in front of him, and light suddenly appeared.

Mr. Zhang Dayu graduated from Tsinghua University. In the same year, he was admitted to studying in Germany and the United States for public funds. He gave up the quota for studying in the United States to his classmates and went to Dresden University in Germany to study colloidal and surface chemistry. He obtained a doctorate in engineering in 1933. After returning to China, he taught at Tsinghua University, where he served as a lecturer and professor.

When the War of Resistance Against Japan broke out, Mr. Zhang Dayu went from Peking to Changsha, and from Changsha to Kunming to teach at Southwest Associated University and also served as a researcher at the Institute of Chemistry of the Central Academy of Research. He also moved from basic research to technical and scientific research on oil and coal, in order to contribute to the victory of the anti-Japanese war. At that time, he was studying the production of important national defense materials from vegetable oil and began to study methods to refine coal into gasoline.

Low-temperature dry distillation tar processing liquid fuel is a new technology just pioneered in the 1920s. It was put into actual production in 1933, with the most developed technology in Germany. Mr. Zhang Dayu only noticed this new technology while studying in Germany and did not have much ready-made experience to learn from.

However, these dozen pages of information explain in detail the process of low-temperature dry distillation coal tar and the description of related equipment. From a professional perspective, Mr. Zhang Dayu can basically be sure that this is not a random writing, but is indeed in line with the principles of chemicals.

With these materials as guidance, the embarrassment of having no experience and no method to follow, saving a lot of time for research and exploration and manpower and material resources. However, some details are still blurred, perhaps it was done on purpose, or perhaps the person who wrote the materials was not sure.

The words in the letter are very respectful and respectful. The final expression is that I want to ask Mr. Zhang Dayu to go to the Yongcheng Anti-Japanese Base Area to jointly study and create problems related to low-temperature distillation, and absolutely ensure its safety. I also sent a travel fee with the letter. If Mr. Zhang Dayu could bring some teachers or students from the United Nations University to go together, the travel fee would be reimbursed. The signature was a strange name: Zhao Yurou.

Yongcheng? Zhang Dayu got up and flipped through the bookshelf, took out a map album, searched for a long time, and finally found Yongcheng at the junction of Henan and Anhui. The occupied area? Zhang Dayu was surprised. Can he study it with peace of mind in such an environment?

After walking back and forth in the house with his hands behind his back, Zhang Dayu picked up the information and looked at it. He couldn't help but feel the desire to serve the country and pursue his professionalism. He decided to ask the sender tomorrow for a good question and finally make sure of his end.

…………………

It's late at night and people are not asleep.

Zhao Yurou yawned gently, handed the written paper to Hao Jiaqi, and said, "Look, I think this should be like this."

Hao Jiaqi took it, but did not answer immediately after reading it. After thinking for a while, she pushed her glasses and said, "The vertical steamer and the generator type are not good at commenting on the advantages and disadvantages, but I think Chief Yang prefers gas generators, and the same is true for the construction tasks given to the factory. In more than a week, the first generator may be completed. As for the vertical steamer, it seems to be inclined to be researched with small output, and it does not seem to be a large-scale construction."

"I think so too." Zhao Yurou nodded and said, "Although there is no explicit statement in the plan, it can be seen that coal chemical industry will be divided into two development directions, one is military industry, civilian use, and the other is like medicine. Well, there is one sentence I remember very clearly, 'From coal tar to dyes and then to drugs, the Germans have proved that this path of chemical synthetic drugs is feasible'. So--" She turned her inquiry eyes to Hao Jiaqi and raised her eyebrows.

"Sulfa!" The two almost said it together, and then smiled at each other.

Sulfonamide is a very effective anti-infective drug. It was developed based on the discovery announced by German biochemist Domagk in 1935 in 1935. It began to be put into clinical use in 1936.

When it comes to antibiotics during World War II, I'm afraid most people will recommend penicillin first, but sulfonamide also greatly reduced the mortality rate of World War II wounded soldiers.

During World War II, every American soldier was given a first aid kit hanging on his belt, which contained sulfonamide powder, sulfonamide tablets and a roll of bandages. Quickly sprinkle sulfonamide powder on the wound to prevent infection is an important part of the basic battlefield first aid knowledge taught by every American soldier. Sulfonamide powder and sulfonamide tablets are also important first aid drugs carried by battlefield ambulances.

It is of course the most ideal to be able to produce penicillin, but without the specialized equipment and talents of biomedicine, selecting high-yield strains, purifying penicillin, deep tank fermentation and other advanced technologies are impossible to complete at present and even for a long time.

Therefore, Yang Tianfeng set his direction on sulfonamide, and the equipment needed is relatively simple and easy to produce. Although the side effects are relatively large, it is also a life-saving magic medicine.

Zhao Yurou and Hao Jiaqi's guess is correct. The development of coal chemical industry is indeed in both military, civilian and pharmaceutical directions. Beneficids and other substances can be used as raw materials for explosives, while humic acids can be used as fertilizers. As for medicine, it is mainly sulfonamides at present, and there may be other drugs in the future.

"If sulfonamide can be developed, how many soldiers' lives can be saved on the battlefield of the Anti-Japanese War!" Zhao Yurou looked forward and showed a fascinating expression.

"Haha, I'm going to ask you to find Yang Tianfeng again." Hao Jiaqi smiled and said, "Let him take out the sulfonamide production process. If there are the experimental equipment that has just been shipped, let's focus on this direction."

Zhao Yurou curled her lips and said, "I don't know what I'm busy with all day long, and I'm running around. By the way, I've always wondered how he knew so much and could do so many things."

"Didn't you say he had letters with his German friends?" Hao Jiaqi didn't want to make any guesses, and her eyes turned and joked: "Maybe it was a German girl who loved him and helped him steal information from Germany?"

Humph, Zhao Yurou rolled her eyes and said angrily: "It's okay for the Germans, but he also has letters with the Japanese, and he is not afraid of being regarded as a traitor?"

"Aren't we called him a traitor before?" Hao Jiaqi smiled bitterly and said, "But look at how hard he fought the Japanese, and if others say he was a traitor, I'm afraid I won't even believe you!"

Zhao Yurou thought about it, nodded helplessly, shook her head and said, "I don't understand him, it's really--"

"It really makes people love and hate it, right?" Hao Jiaqi squeezed his eyes mischievously, "I want to have a stern face when I meet, but I don't want to see you and think about you again, what can I say!"

"Nonsense." Zhao Yurou's angry expression was not very real in Hao Jiaqi's eyes. She also closed her mouth immediately. She went to find Ma Yuming under the name of the third wife of Yang Tianfeng, but she had done the transfer of her family.
Chapter completed!