Cai Yuanpei was about to say something, but when he saw someone coming in, he stopped quickly. A young teacher came in. He saw that it was an acquaintance and said loudly: "Brother Xian Qian, you have finished the class. Thank you for your hard work." Seeing that Yang Rui and Xian Qian were not familiar with him, he introduced: "This is Brother Xian Qian, who is now in the teaching club." He pointed at Yang Rui and said: "This is Brother Jing Cheng, who teaches economy."

Yang Rui hurriedly bowed and said, "I'm the surname Yang, and my name is Jingcheng. I'm lucky to know, and lucky to know."

The other party also gave in, fortunately met. Now the three of them sat down and chatted, and Cai Yuanpei was free today. The chemistry teacher's surname is Zhong, from Ningbo. He set up a phosphorus factory in Pudong in his early years. Last year, he founded the Shanghai Science Instrument Museum in Shanghai. Because the society lacked teachers, Cai Yuanpei invited him.

Yang Rui was very interested in Mr. Zhong’s Science Instrument Museum and immediately said that he wanted to go there to see it. Zhong Guanguang was a person who liked friends. He was elegant and had a round glasses. Yang Rui found that it seemed that this era was full of Harry Potter-style round glasses, so he had never seen any other shapes, so he followed him to the Instrument Museum on Sima Road.

The name of the Science Instrument Museum is a bit charitable. In fact, it is not, it is just because the things bought here are teaching aids and laboratory equipment, and there are several stores, and there are endless customers. The Science Instructor is two Mr. Yu, the older one is Yu Huizu, and the younger one is Yu Zixun. Both are from Ningbo and are fellow villagers of Zhong Guanguang. Before, the three of them failed to build a phosphorus factory, and then they started this scientific instrument tube together. There was no business when they first started. Later, new studies were prevalent and the business became better.

Yang Rui actually came to see the Science Instrument Museum, and there is also the MSG project that requires experiments first, and some reagents and tools. He now proposed to buy concentrated hydrochloric acid, caustic soda, alcohol lamps, flasks, etc. However, Zhong Guanguang said: "Don't buy it, there is no place to do the experiment when you buy it back, so just do it here. I can still help you."

Seeing that he was honest, and he didn't understand chemical experiments, it would be great if he had a skill here. He was doing research in the loft laboratory of the Instrument Museum. He first went to the noodle restaurant to find some gluten, and according to the memory method, steamed the gluten and ground it into powder, then added to the flask to add concentrated hydrochloric acid, and started heating. Zhong Guanguang also helped him and recorded the experimental steps. Taking advantage of the heating time, the two of them took turns to eat. After about four hours, the gluten disappeared and the liquid in the flask turned black. After turning off the heat, the flask was taken down, filtered several times, heated and concentrated, and then added concentrated hydrochloric acid. The precipitated was glutamate hydrochloride.

Yang Rui was not sure about the following process. After all, what he saw was just a company case. The case only wrote this step. The subsequent process only talked about using caustic soda to precipitate glutamic acid, then dissolve the glutamic acid crystals and then add caustic soda to neutralize sodium glutamic acid. However, Yang Rui was confused as much caustic soda as to add and the pH of the solution. No one told him about this. He didn't understand some questions very well, so he could only ask Zhong Guan. Zhong Guan only heard that Yang Rui was going to invent a new substance and was very interested. He was very curious about what he could do, especially the hydrolysis of hydrochloric acid. He had never played with it before, but now he was adding gluten to the flask and continuing to hydrolyze it. It was really unreasonable.

Yang Rui could only use the exhaustive method when he couldn't remember it. Fortunately, the pH value was only seven, and the pH value of the precipitated glutamate solution could not be 1. He dissolved the glutamate crystals just now, divided the solution into seven parts, and added caustic soda to achieve different pH degrees. The final result was that the most crystals were precipitated between PH3-4. These crystals were glutamate, which was one step further from sodium glutamate.

The crystals of glutamate were gone again, and the two of them simply used up all the gluten. For a while, the laboratory was full of alcohol lamps. When they rested, it was already dark outside and Yu Zixun had already delivered the meal. After the meal, they started to discuss the details of the experiment. Yang Rui had learned chemistry before. Although he had learned a lot, it had not been useful for too long. Moreover, the teachings in later generations were light experiments and focused on books, and his level was not ordinary. Zhong Guanguang did not learn chemistry regularly, but he only studied by himself. His foundation was not solid, but his hands-on ability was very strong. He set up a phosphorus factory last time.

It was he who figured it out bit by bit. After success, they presented the samples to Sheng Xuanhuai, Minister of Commerce. Speaking of this, Zhong Guanguang's voice became louder: "At that time, Shanda sent someone to see the finished products we made, and said that our yellow phosphorus was made properly and would not be allowed to go abroad. It also approved the patent for fifteen years. Later, everyone became excited. Hanzhang and I raised 10,000 yuan to open a yellow phosphorus factory in Pudong. Who knew that the laboratory made in the factory often had problems. Later, the loss was so great that the factory was closed." Zhong Guanguang sighed and didn't say anything further.

Seeing that he was depressed, Yang Rui took out a cigarette and gave him one, lit it, and lit it himself. He changed the topic and asked, "Your instrument hall is not bad now, and you have made a lot of money from this business."

Zhong Guanguang took a sip of cigarettes, probably because he choked after sucking deeply, and coughed a few times. After a long period of time, he said, "It was also a very dangerous thing to come. When it first opened, no one came. He only made one business a month and collected ten yuan. At that time, everyone was panicked and thought they would close the door at a loss. Fortunately, the court launched a new school and the business immediately got better. What a lucky thing."

Yang Rui said: "This is an unpopular industry. As long as you stand firm, there will be no big problems in the future."

"But I can't be so energetic about this. I just went to Japan to pull things over and then sell them. The money can be made, but it's always so tasteless." Zhong Guanguang said dissatisfiedly: "I still want to do something myself. This year I went to Japan to purchase goods. After I arrived in Japan, I wanted to go to the chemical factory to see it, but I just didn't let me in... I think I'd better study in Japan for a few years and learn chemistry."

Seeing that he was expressing his thoughts, Yang Rui advised him: "Don't go to Japan. Now you should go there with the Germans with the most powerful chemistry in the world."

Zhong Guangui was a little surprised: "Are the Germans that powerful? Isn't they the best in the UK now?"

Yang Rui smiled: "Now, Germans account for 80% of the world's high-end dyes. Do you think it's amazing?"

Zhong Guangui was still surprised. After all, Germany is a little unknown now. Since occupying Qingdao, it has not been very troubled, so it is impossible to associate Germany with the word "first". He patted his thigh and said, "Then go to Germany," as if he had made up his mind and asked again: "How to go to Germany? Is the school there to accept people?"
Chapter completed!