Chapter 606 (2/2)

But no one made any sound.

Stone bear also raised his hand after saluting, and then hurried into the big house.

As soon as I went in, a stream of hot air came to my face. About 30 people in white coats were busy inside.

Entering this house, the stone bear was in a trance for a moment. If he wasn't sure that he was in the 1870s, he really thought he had come to the laboratory when he was in college.

In this huge house, all kinds of test instruments can be seen everywhere. Various kinds of glassware and metal utensils of different shapes are filled in this room. Many scientific researchers are concentrating on all kinds of experiments.

They didn't even see the stone bear coming.

The stone bear didn't disturb them either. Under the guidance of Agust, he went to a much smaller room next to the big house. There are also many bottles, jars and all kinds of test utensils.

”Chief, this is the penicillin dish.” Agust went to a sealed glass room that was the size of a double, and said, ”in this sealed glass room, there are pieces of glassware of different sizes.” our penicillin is cultivated in these containers, and the temperature and humidity in the glass room are controllable. ”

The stone Bear looked at the glassware of different sizes, which was full of brown culture medium and a handful of blue gray moldy substances floating in the culture medium, and nodded slightly.

”Now we can cultivate penicillin strains on a large scale. It's not difficult to cultivate. As long as we control the temperature and humidity, we can cultivate a large number of penicillin strains in a short time. However, for the purification of penicillin, we have not yet found a large-scale and stable extraction method

Stone bear nodded again. As the director of how to cultivate penicillin and purify penicillin, he naturally knew that the real penicillin was not those blue gray moldy substances, but existed in these culture media. Only the penicillin purified in these cultures is the real penicillin.

Only penicillin is mixed in the culture medium. If it is not purified, it is difficult to keep the culture medium at room temperature for a long time.

Therefore, in order to get the true penicillin, it must be purified from these media.

But the problem is that although the purified penicillin is powder, it belongs to solid in physical phase state. In order to purify the solid from the liquid, the liquid is usually evaporated by heating, and the dissolved penicillin can be separated out.

It's like the exquisite salt made by stone bear after the soul of this era. In fact, it's a process of purifying salt by evaporation.

But the purification of penicillin can't be done in this way. Because penicillin bacteria can not endure high temperature, once the temperature is too high, even if the penicillin is purified, the purified penicillin is useless.

In the original historical time and space, Alexander Fleming, who was the first to discover penicillin, was troubled by this link for more than ten years. It was not until 1939 that Australian pathologist Howard Walter Florey and German biochemist Ernst chann began to try other methods to purify penicillin. This method of purifying penicillin is freeze-drying!