The expected rival rush scene did not appear, and the onlookers on the playground couldn't help but feel a little interested. And the girls watched Ouyang Yun walk towards the office building, only to feel that his not tall figure suddenly became clear - no one thought that he was a coward, on the contrary, it added a lot of charm to him. Many people can't help biting their lipes and suddenly have a secret that belongs to summer.

When Ouyang Yun scanned the crowd just now, he didn't find the students of the special service team, and he was very relieved, at this time, they should still be in the laboratory, right? It's a shame to say that, after all, he only knows some theoretical knowledge, and his hands-on ability is not as good as those students, and things like cultivating the original strains of penicillin can only be left to them to do - this is the sorrow of plagiarists, pseudo-experts, useless!

The main projects of the special service team are transistors and penicillin.

Historically, the appearance of the transistor on December 23, 1947, was first invented by the Shockley group of the famous Bell Labs in the United States, and then quickly replaced the position of the electron tube in the electronics industry, thus creating a milestone in the modern electronics industry. Transistors are solid electronic components made of semiconductors, and the most common application materials are germanium and silicon. Since both germanium and silicon exist in a chemical state in natural substances, and there is no such thing as high-purity germanium and silicon, the first step in the research of a group of cadets is to find a way to purify germanium and silicon from substances such as soot and silicate.

And penicillin, that is, the production of penicillin, can only produce natural penicillin under the conditions that Ouyang Yun can currently use. In order to achieve large-scale production of penicillin, there are no more than two steps: the first is the fermentation of the strain: the Penicillium flavonium is inoculated on a solid medium and cultured at 25 °C for 7~10 days to obtain a spore culture of Penicillium. Then use sterile water to make the spores into a suspension inoculated into the sterilized medium in the seed tank, enter sterile air, stir, and incubate at 27 °C for 24~28 hours, and then inoculate the seed culture liquid into the fermenter sterilized medium containing phenylacetic acid precursor, enter sterile air, stir, and incubate at 27 °C for 7 days, and add phenylacetic acid precursor and an appropriate amount of medium during the fermentation process. Then there is extraction and refining: the penicillin fermentation broth is cooled and filtered. Under the condition of pH 2~2.5, the filtrate was extracted with butyl acetate in the extractor for multi-stage countercurrent extraction to obtain the butyl ester extract, which was then transferred to the buffer of pH 7.0~7.2, and then transferred to the butyl ester, the butyl ester extract was decolorized by activated carbon, added to the salt forming agent, and penicillin G potassium salt was obtained by azeotropic distillation.

Since Ouyang Yun's so-called penicillin mass production method is plagiarized and is a relatively modern production method, and in China at present, due to the weak chemical base, such as butyl acetate and phenylacetic acid must be imported, they must find other alternative culture and extract solutions - this is one of the reasons why Ouyang Yun wants to start a chemical company.

Speaking of the military industry, Ouyang Yun's original plan was to plagiarize some designs or something as far as possible not to be too advanced, preferably the kind that is super affordable and easy to build - China's current industrial strength is like this, although he wears a hat of overseas Chinese in the United States, but he suddenly came out with a Su-27 or something like that, who knows what the countries around the road will think. The so-called tree is a big wind, and if it causes an eyeball effect, it may not be a good thing. In terms of light weapons, he originally wanted to reorganize the AK-47 and get some grenades, but after reading a lot of computer data, he found that there was a firearm that was even more powerful than the AK-47 at about the same time, and that was the G3 automatic rifle launched by the Federal Republic of Germany in 1957. Compared with the AK-47, the G3 not only has a range of about 100 meters farther, but also has low requirements for the production process because of the widespread use of stamped parts and relatively few machined parts. MORE IMPORTANTLY, DUE TO THE LONG BARREL OF THE G3 WITH A CALIBER OF 7.62MM, A VARIETY OF GUN TYPES INCLUDING SUBMACHINE GUNS AND SNIPER RIFLES CAN BE DERIVED WITH SLIGHT IMPROVEMENTS BASED ON THIS.

In terms of machine guns, the German MG42 general-purpose machine gun is naturally the first choice, and it only needs to change the ammunition supply method, so it can not only be used as a light machine gun to provide the main fire cover for the squad and platoon, but also as a heavy machine gun to provide important fire support for large units such as battalions and companies. What's even more valuable is that it can also crash into armored vehicles and tanks to become a vehicle-mounted machine gun, and if two guns are combined, it can become an anti-aircraft machine gun.

Due to the general lack of air defense weapons in the domestic army, if this kind of machine gun is formed on a large scale, with the arrogant and domineering habits that the Japanese air force has cultivated on the Chinese battlefield, it is estimated that once the Pingjin War starts, the MG42 will definitely become a nightmare for the little devil pilots.

THE ONLY PROBLEM IS THAT SINCE THE G3 USES A 7.62MM CALIBER BULLET, WHILE THE MG42 USES A 7.92 CALIBER BULLET, THEN SOLVING THE PROBLEM OF THE VERSATILITY OF THE GUN CARTRIDGE HAS BECOME A PROBLEM THAT THE THREE GROUPS OF CADETS MUST CONSIDER. Because Ouyang Yun provided the drawings, the three groups of students quickly made models out of wood, and then with the help of the ideas provided by Ouyang Yun, they designed light, heavy, and duplex styles based on a single MG42. The MG42 drawings that Ouyang Yun handed them were single, and the reason why they did this was to cultivate their hands-on and brain-using abilities. The MG42 was changed from a light machine gun to a heavy machine gun, which only changed the ammunition feeding method, and the change to an anti-aircraft machine gun only required a double combination and an anti-aircraft sight. However, because the anti-aircraft sight involves the problem of warp firing, the corresponding data can only be obtained through actual tests, so the cadets cannot come up with a specific plan for a while.

The special service team is Ouyang Yun's baby bump, and in his heart, its importance is no less than that computer that crossed over. Therefore, his security work is what he has always emphasized, and he came here today to check the security situation, and the other is to take the three groups of cadets to Renqiu.

Speaking of which, Situ Leiden, an old man in the United States, is really good, I don't know if it is because he has been in China for a long time, he does not have the inherent rigidity of Westerners, he not only set aside a small building as the residence of the special service brigade and the security forces, but also arranged a training place for them. These places, including the laboratory, are all controlled by the Fox Hitomi and Renqiu Special Police Squadrons, and outsiders are not allowed to enter. Ouyang Yun had just appeared twenty meters outside the gate of the experimental building, and a fox pupil soldier stood up from behind a tree, and instinctively said: "Please stand and ...... it" Before he finished speaking, he saw that it was the brigade seat, and hurriedly saluted and said: "Report to the brigade seat, the fox pupil soldier Hou Jiaqiang is on duty!" Are you going to the Lab Building? ”

"Yes!" Ouyang Yun returned a military salute and took out the pass.

Hou Jiaqiang took it and looked at it carefully, and then put him in.

Hou Jiaqiang's serious and responsible attitude made Ouyang Yun appreciate it very much, and he was also a little proud, and he said in his heart that he looked like a regular army. Then he passed through two more sentry posts before entering the laboratory.

Yan University Laboratory is a three-room, two-storey two-storey building with only two laboratories, one of the other rooms used as a warehouse, and three rooms were vacant. Under the reorganization of the Secret Service Brigade, one was used as a guard room, three laboratories, and one as a conference room.

Ouyang Yun first walked into the mechanical laboratory of the three groups, several students around the MG42 and G3 models were debating the issue of bullet path, he listened quietly for a while, and after seeing that everyone was the most confused, they reached a consensus, thinking that it would be better to change the G3 bullet diameter to 7.92, and said with a smile: "Yes, as a machine gun, especially for the air, the impact effect of the bullet diameter is too small, and the impact effect will be greatly reduced." But have you taken this into account, the plane is made of steel or alloy, can ordinary bullets penetrate? ”

The cadets only noticed him at this time, and many people shouted in surprise: "Brigade seat? Then they saluted.

Ouyang Yun returned the military salute, then picked up the model of MG42 with a smile, played with it for a while and said, "Not bad, who made it, the carpenter has good craftsmanship." ”

Everyone looked at Gao Tian, who touched his head and smiled stupidly and said, "My father used to be a carpenter, and he learned a little bit from behind. ”

"Bring the model and follow me back to Renqiu, our military factory is about to start."

"Really?!" "Great!" ……

Ouyang Yun greeted them for a while, asked them to go back to the dormitory to pack their luggage, and waited for him to ask them to go back to Renqiu together, and then went to the laboratories of the first and second groups on the second floor, visited the students of the other two groups respectively, and checked their experimental progress. Since they were dealing with an unknown territory, there were no precedents to refer to, so most people were looking through the data, and the second group of corn, which was used as a culture medium, was still intact.

He knew that there was no urgency in this matter, and he didn't have any good ideas for reference, so he encouraged them to go downstairs to the principal's office to ask for a meeting with Situ Leiden.

The old man in the United States really helped him a lot, he came to him, firstly, to thank him in person for the affairs of the special service team, and on the other hand, he wanted to ask him to help apply for a visa.

Originally, the Americans did not set up a consulate in Beiping, and for the sake of visas, Jiang Shuren also specially took the letter issued by Situ Leiden and went to Nanjing. However, due to the change in the delegation, many of the businessmen withdrew, and the visa trip was in vain. Now, due to Song Zheyuan's instructions, the gangs in Pingjin and Tianjin have begun to take some "road" measures against the Japanese; In addition, through the efforts of Jiang Shuren, an iron ore screening plant was opened in the Yidong area, and a steelmaking plant was built in the southeast of Renqiu. Coupled with the exemplary role of Gu Xudong and Shang Wolf, the delegation has added fresh blood and can finally make the trip. Fortunately, just a few days ago, the Americans actually set up a consulate in Beiping, so that visas are much more convenient.

This move of the Americans is somewhat strange, and has even aroused the reverie of many politicians. You must know that the 29th Army is now clearly a local government, and Beiping is equivalent to the "capital" of this small kingdom. If anyone is lucky enough to know George and Robson, two American spies, then perhaps it is not difficult to find the answer; Of course, it may have something to do with Gu Lianyun.

Ouyang Yun didn't think about it so much, this is a good thing, with Situ Leiden's relationship, it is much more convenient to apply for a visa.