Although seven days is not enough time to get from Sizhou Island to the mainland, don't forget that this epidemic is artificially transmitted. There are ways to extend the incubation time, such as using two boats to relay and so on.

Therefore, Jiang Xingchen is very urgent now, once the other party is mad and wants to spread the epidemic to the mainland, he can't prevent it at all. Although there are only two ports, the coastline of the mainland stretches for thousands of miles, and some of them are landing places.

The old man also understood the importance of this matter, once Jiang Xingchen's prediction came true, this disaster would be immeasurable.

As for who is secretly spreading the epidemic and what kind of purpose it has, these cannot be worried for the time being, and the development of penicillin as soon as possible is the most important.

"What's the progress now?" Jiang Xingchen asked.

Xin'er kept frowning beside her, not knowing what she was thinking, so dazed that she didn't react when Jiang Xingchen asked.

"Still no!" the old man took over and said, "Now there is no big problem with cultivating Penicillium, the main problem is extraction!"

Jiang Xingchen scratched his head a little, he had definitely seen the method of making penicillin in his previous life, and it was described in the TV series of the benevolent doctor. But at that time, he felt that it was an exaggeration, penicillin has higher requirements for acid, alkali, temperature, and aseptic operation, as if it takes many steps, and it has to go through multi-stage reverse extraction to have enough concentration, how can it be so simple.

Later, he forgot to hear anyone say that this method of making earth was possible, but he did not review it carefully. As a result, I can't remember it at all now.

"After extracting a large amount of penicillium for cultivation, what should I do next?" Jiang Xingchen was depressed, and it would be better to take a closer look at it at that time. In addition, he remembered that during the Anti-Japanese War, Dr. Fu Lai also produced penicillin in the extremely simple environment of Yan'an, but he did not know the formal methods and procedures.

"Heart. Xin'er!" When Jiang Xingchen was worried, the old man called out to the heart on the side, what is wrong with this girl, she has been there in a daze since just now.

"Ahh

"What do you think. I don't say anything if I ask you what is going on!" the old man raised his hand and knocked on Xin'er's head, with a taste of doting, he was very, very satisfied with this apprentice.

Xin'er pondered for a moment and said, "I was thinking just now, what this penicillin will be like when it is refined, and the lord doesn't seem to have mentioned it." But it will definitely not be applied externally to the wound as before, and if you want to treat the epidemic, it should be taken orally or injected, so the penicillin extracted will not be this green-green sticky thing......"

After Xin'er finished speaking, a lightning bolt flashed through Jiang Xingchen's mind. In an instant, the deepest memory picture was illuminated.

"Injected, colorless transparent aqueous solution. By the way, penicillin is soluble in water!" Xin'er's unintentional reminder finally reminded Jiang Xingchen, and the scene in the TV series reproduced in his mind little by little.

"After incubation, large impurities should be filtered, and then vegetable oil should be used to filter out fat-soluble and insoluble substances, leaving penicillin aqueous solution......"

When you remember one picture, the following pictures will continue to emerge. Then penicillin is adsorbed with sterilized toner. It is washed with distilled water, and then the alkaline impurities are filtered out with acetic acid solution. Finally, the weakly acidic penicillin is precipitated with a weakly alkaline solution.

"Boy, have you thought of something?" The old man couldn't help but whisper when he saw Jiang Xingchen's expression constantly changing, sometimes contemplative, sometimes surprised.

"Hmm!" Jiang Xingchen nodded vigorously and said, "Hurry up and get a pen and paper." I'll record it!"

Jiang Xingchen didn't care about the old man and Xin'er anymore, and turned around and brought a pen and paper at the same time. Jiang Xingchen lowered his head and quickly recorded the picture that flashed in his mind, for fear of forgetting.

In fact, he has no bottom on whether this method of soil production will work or not, and the low concentration is certain, and it is indispensable to use this method to separate penicillin impurities.

But now there is no other way. This is the only solution. Perhaps in the future, Xin'er will study a formal cultivation and refining method of penicillin, but it is too late in time.

It is said that the use of penicillin requires a skin test, but in the case of such a raging epidemic, even this problem has been ignored by him. Even a small number of people die from drug allergies than the epidemic cannot be controlled.

Soon Jiang Xingchen wrote down the steps, and the old man and Xin'er grabbed it as soon as possible, read it twice, turned around and ran into the laboratory.

Jiang Xingchen didn't follow up, he had to make enough preparations. Petri dishes, test tubes, all kinds of glassware, toner sterilization, and a sterile environment are all required.

Turning his head out of the laboratory, Jiang Xingchen went straight to the glass production factory, all kinds of glassware must be made as soon as possible. In addition, needles and tubes need to be produced in large quantities.

After coming out of the glass factory, Jiang Xingchen went to Zhaojia Pharmaceutical, and it was impossible to produce penicillin in large quantities with only two people, the heart and the old man, and a large number of people were needed.

Zhao Zixiang was scared into a cold sweat after hearing Jiang Xingchen talk about the epidemic, he also once caught up with a plague epidemic, and the scene was really terrifying.

Then I heard that drugs were being developed, so without saying a word, I personally took hundreds of people to the university to help the old man and Xin'er.

After finishing all this work, Jiang Xingchen wrote a letter to the emperor and the emperors of the four kingdoms, explaining the overseas epidemic and his own suspicions, and asked all localities to take more precautions, otherwise with the latent nature of this epidemic, once it breaks out, it will not be able to be controlled at all.

And just after Jiang Xingchen sent out a few letters, he received a letter from the fourth child, and there was also an epidemic on Mingque Island. Although he was informed by the old man that the precautions were already very strict, he still couldn't stop it. There was an ill patient at the port prior to the letter, and now all those who came into contact with this person have been quarantined.

Jiang Xingchen's face was gloomy like water, and now he was sure that this method was aimed at him, otherwise why would Chongming Island and Mandan Island be fine, they would be the hardest hit there.

"An family, Nangong, is it you again?" Jiang Xingchen slapped heavily on the table......

At the same time, on the north side of a small island three hundred miles away from Minggang Chen, two five-story treasure ships floated quietly on the sea.

In the cabin of one of the ships, the black-robed man who had appeared in the capital of the Moon Shadow Kingdom was sitting on a chair, his head and face still hidden in the shadows.

In front of him, there were two big men kneeling, who were whispering: "My lord, you are ready, are you really going to enter the mainland? Will our actions on the mainland ...... in the future?"

"You're talking too much!" the black-robed man said in a deep voice.

The big man slammed his spirit, and hurriedly said, "My subordinates will do it, and I will do it!" As he spoke, he pulled the person next to him and quickly ran out of the cabin.

"Hmph!" the black-robed man let out a sneer, and the essence of his eyes flashed in the shadows! (To be continued......)

PS: I checked a lot of information in the afternoon, and I can only write two thousand in this chapter!