At dinner time, the family sat at the round table and had a meal.

Yan Xue is also among them. She is already eleven years old. Everyone outside regards her as the third lady of the Qin family.

Zhu Wan suddenly said: "A Di, according to the method you said, we have been constantly screening Penicillium. Recently, we have found three strains, which have inhibitory effects on Staphylococcus."

Qin Di was overjoyed: "It's great! Next, we need to cultivate Penicillium with corn slurry, add toluene acetic acid to the culture medium, and then irradiate with ultraviolet rays to induce mutations and screen out strains with high yields!"

Qin Ling asked in surprise: "Can ultraviolet rays induce mutations?"

Qin Di nodded and said, "There is a Fenson lamp in Denmark, which is an ultraviolet lamp that can treat lupus and skin diseases. Fenson won the Nobel Prize in 1903. However, ultraviolet rays are harmful to the human body and also to bacteria. They can cut DNA, cause mutations, and lead to cancer. Therefore, people in the laboratory should be reminded to be careful when using ultraviolet lamps and not illuminate them for a long time."

Zhu Wan said: "Then hurry up and buy a few."

Qin Di smiled and said, "I have bought it long ago, and it is piled up in the warehouse."

Historically, the initial penicillin yield was very low, with only one or two units per milliliter of solution. One unit was equal to 0.6 micrograms.

It was not until 1941 that Americans found strains from moldy cantaloupes and increased to 40 units per milliliter. Later, after continuous upgrading and replacement, combined with large fermentation tanks, fermenting 500 cubic meters at a time, reaching 100,000 units per milliliter, so penicillin became less and less valuable. In the 21st century, China became the leading antibiotic producer.

Qin Di didn’t dare to think about the strain of 100,000 units. It would be a big deal if there were 5,000 units this year!

Historically, in 1944, researchers at the University of Wisconsin irradiated Penicillium with ultraviolet rays and obtained 2,500 units of strains.

Although Qin Hancheng did not know penicillin, he also felt happy when he saw his wife and children happy.

Qin Yue is seventeen years old and is very beautiful. She is three points more beautiful than her sister Qin Ling. She is about to go to college after the Spring Festival.

At the dinner table, Qin Hancheng asked her what she wanted to learn.

She said, "Dad, I want to choose a literature department."

Qin Hancheng refused to argue. In his opinion, girls can learn anything and do not need to study medicine. It is good to study medicine, but like Zhu Wan and Qin Ling, they are busy every day and rarely stay at home, which is not a good thing.

Zhu Wan said: "St. John's University has a Department of Literature. I'll tell the dean and you can go in and study. Our Qin family donates money to the school every year, and we can't donate money in vain."

Qin Yue smiled and said, "Okay, OK!"

However, Qin Di said: "The years ahead are turbulent and uneasy, and literature is not a good choice."

Qin Yue put down the bowls and chopsticks and asked, "Brother, why?"

Qin Di said: "I'm afraid you will be imprisoned if you are involved in a dispute!"

Qin Hancheng was anxious: "How could there be a prison disaster?"

Qin Di sighed: "Unless you write about the wind, flowers, snow and moon, something is easy to happen. In the dream, the tears of a loving mother are vaguely, and the king's flag changes on the top of the city. I can't bear to see my friends become new ghosts, and I look for a poem in the sword."

Qin Yue's eyes lit up and she said, "This poem is good. Brother, tell me carefully, what can happen?"

Qin Di said: "Either you are assassinated or imprisoned. You will be desolate in the evening or stay away from your homeland."

Qin Yue was frightened when she heard this: "Brother, don't scare me."

Qin Hancheng was over 40 years old, and his beard was left under his jaw, and his pruning was finely trimmed. At this moment, his beard was shaking and he advised: "A Yue, otherwise you should just study medicine."

Qin Yue shook her head: "I can't see blood, I feel dizzy when I see blood; I don't like to contact patients, so I can't say a few words to them."

Zhu Wan said softly: "How about you go to study theology? Come out to be a pastor? Or you can do it? Come out to be an engineer?"

Qin Yue had a bitter face: "I am poor in mathematics and non-arithm. How can I choose Neo-Confucianism? I don't want to open my eyes and tell lies, so I can't choose theology."

Zhu Wan glared at her: "Hmph, the pastor preached, why are you talking lies with your eyes open?" Then she reached out and drew a cross on her chest: "Lord, please forgive her, because she doesn't know that only your words are true..."

Qin Yue stuck out her tongue and didn't dare to continue talking.

Qin Ling remembered that Qin Di once said that her sister had many disasters in her life, so she said to Qin Yue: "You have no problem choosing literature, but there is a condition. If you write an article in the future, you will show it to us first. We can only publish it after we agree. How about it?"

Qin Yue blinked and said, "Okay, I agree." However, she was thinking in her heart: "I just agreed temporarily. When I graduate in the future, can you still follow me every day?"

Qin Di knew her thoughts and said, "Actually, it's not a big problem for you to publish an article. Just don't practice it yourself and just use a knife and a gun."

Qin Yue said in surprise: "As a literati, why do I have to use a knife and a gun?"

"This matter is hard to describe!" Qin Di understood in his heart: the world's general trend is vast, like a huge furnace, making people struggle in it.

The road to rejuvenation of the Chinese nation is destined to be a vast road, just like the endless flow of Yangtze River, which can easily overturn small wooden boats, causing many people to pay blood and sweat, including accidental injuries again and again!

Qin Yue is as pure as a piece of paper today, and then he will be unable to help himself.

Qin Di did not want to interfere with her sister's freedom, but she did not want her to be hurt, so this incident made him feel embarrassed.

He thought about it for a long time, and finally decided to let his sister choose the future path.
Chapter completed!