Daming: The system rejected my request for salted fish

Chapter 1193

Wei Wu originally thought that Doctor Xu should have some in stock, but Doctor Xu just shook his head.

"Penicillin takes too long to extract, but too short to store. It's difficult for the Imperial Hospital to ensure it always has stock."

After Doctor Xu finished speaking, Wei Wu remembered that the storage time of penicillin solution was indeed only seven.

It also needs to be stored in a low-temperature, dry place, otherwise it will easily go bad, which is indeed a bit difficult.

Thinking of this, Wei Wu pondered for a moment and spoke again.

"How about this! Go find your cousin Xu Miao and ask him to help you turn the penicillin solution into a crystalline powder."

"Once penicillin crystals are made, they can be stored for three to six months in a dry, sealed, and low-temperature environment."

It is actually quite difficult to make penicillin into powdered crystals, but the difficulty lies not in the method but in the materials.

Because penicillin solution needs to be dissolved in ether and then allowed to evaporate naturally in a cool and ventilated place to obtain penicillin crystals.

The problem is that ether is difficult to make. It requires a reaction between ethanol and concentrated sulfuric acid, and then extraction through condensation.

The key is that during this process, the temperature must be maintained stably at 140 degrees, and then purification must be carried out.

Fortunately, Xu Miao had already learned the knowledge of three acids and two bases, so it was not difficult to extract concentrated sulfuric acid.

As for ethanol, it is nothing more than distilling the wine several times until the concentration reaches the standard.

Letting Xu Miao help Doctor Xu can also train his practical skills and gain more experience in chemical preparation.

Of course, it’s okay even if you can’t figure it out in the end. There is another slightly simpler method that you can try.

Using volatile plant oils as an alternative solution is simpler, but it is very time-consuming to collect.

When Doctor Xu heard Wei Wu say that the storage time of penicillin could be extended, his eyes lit up and he immediately took it to heart.

I plan to find Xu Miao when I have time and ask him to help me solve it, so I won’t have to worry about this anymore.

To be honest, although penicillin is very effective, it also made Doctor Xu feel a little useless at one point.

This thing may cause allergies, so Doctor Xu rarely uses it and will only use it when there is no other choice.

For example, if the wounds of the poorest people at the bottom of society become inflamed, they will most likely die if they do not use this medicine.

But he still had a family to support, so he decided to take a gamble and treat the patient with penicillin.

The problem is that this thing is complicated and time-consuming to prepare, and the storage time is too short, only seven days.

Sometimes he wants to use something but it is not in stock. When it is prepared, there are no patients who need it, so it is wasted.

So after Wei Wu finished speaking, Doctor Xu immediately nodded in response.

"Okay, I'll go find him for help later."

After saying this, Doctor Xu hesitated for a moment, then asked again:

"You plan to give Duke Wei penicillin, but what about the allergy issue?"

"It's very simple, just test first to see if there's an allergic reaction."

In the past, Wei Wu didn’t know how to test for penicillin allergy, otherwise he wouldn’t have been troubled by amoxicillin.

Of course, even if Wei Wu knew how to test it at that time, he probably wouldn't experiment on Zhu Xiongying.

He was the crown prince of the Ming Dynasty, and at that time the relationship between Wei Wu and the Zhu family was not as close as it is now.

But fortunately, people will continue to improve, and Wei Wu has an extremely convenient artifact like the system.

During his time on the grassland, although Wei Wu experienced the daily life of herdsmen, he did not stop improving himself.

As long as it is a book obtained from the system, no matter what it is, he will read it, even if he can't get into it, he will force himself to read it.