When Li Yi was making soap, during the saponification reaction, there were layers of salt, glycerin, and so on in the chemical reaction.
There was an unsaturated saponification reaction liquid inside. After the salt and glycerin were extracted separately, the rest was soap water.
This soap water would usually be used to participate in the next saponification reaction. If one wanted to purify it, they could still produce some soap, but the investment and output were not proportional.
Now, it was just the right time to sell it. Li Yi did not care about the entire Tang dynasty, but Chang 'an County was not a problem.
There were more than a million people, but not all of them used soap water. Some of them used soap powder, and the poor people used plant ash to wash.
Now, the people of the Tang dynasty did not take a bath for a long time, especially in winter. Only the officials had a day off.
It was not unusual for the girls in Pyong Kang Square and the people in Beiqu to take baths eight times a day.
In addition, there were also the farmers in Zhuangzi who did manual labor and special workshops. They cut their hair short, and the men even had a buzz cut.
They washed hard in the bathtub, which was convenient and comfortable.
If it were not for his face, Li Yi would have shaved his head bald. It was convenient for him to perform surgery on a bald head. He just needed to put on a surgical cap and did not have to worry about things falling into the patient's wound.
"It's not easy to find oil, especially pancreas. Others use it to wash things with plant ash." Li Yi knew that Li Yi used a lot of fat before.
"I'm using soybean oil now," Li Yi said in a low voice. Who said that the saponification reaction must be animal fat?
"Soybean oil can also be used?" Li Chengqi was surprised. He had never learned to make soap with soybean oil since he was a child. How many magical things were there in this?
Oil and soap, these two things were very different, right?
"It's just like making soybean milk into tofu." Li Yi understood his brother's thoughts and explained with the simplest example.
"Yes, soybean milk can be made into tofu and dried tofu. Soap can also be made by adding gypsum, brine, or vinegar to soybean oil?" Li Chengqi began to imagine.
"If you add vinegar, the cooked oil can be used to mix vegetables." Li Yi joked.
After that, Li Yi asked the child who was holding his stomach and walking over, "Where do you feel uncomfortable?"
"Belly, belly," said the child.
"There are bugs, right? Brother Yi, why don't you give him that candy? "Li Chengqi felt that he could also be a doctor.
Li Yi asked Qing Song to lay the box flat. Then, he placed the child on it and began to press it.
"Does it hurt here?" Li Yi asked.
"It hurts a little when you press it, but it won't hurt if you don't press it," the child answered.
"How does it hurt? Is it like being pricked by a needle?" Li Yi asked.
"It hurts when you press on it, and it hurts everywhere."
"What about here?"
"It doesn't hurt. I can't take it anymore. I want to vomit." The child struggled as he spoke. Wah! He spat out.
"Can I vomit again?" Li Yi looked at the 'water' he vomited and asked.
"I can't spit it out," the child replied.
"Give him two skewers. He's hungry," Li Yi instructed.
She then asked the child, "You didn't eat anything last night?"
"How did you know?" The child expressed that he was very surprised.
"Not only did you not eat, but you also didn't drink much water. When you woke up in the morning, you went straight to Zhuangzi and drank a few mouthfuls of soup. Your body needs a lot of energy, and you also exercised a lot on the ice skating.
Your metabolism was too fast, and the water quickly entered your kidneys and bladder.
The remaining minced meat was fed back by the stomach, and the gastric acid secretion increased. As a result, the food you spit out had foam.
It's also a little bitter, right? The gallbladder is involved in the secretion, and the gastric acid stimulates the gastric mucosa. Of course, you have a stomachache. "
Li Yi gave a scientific explanation. What bugs? It's hunger.
The farmer next to them gave a few skewers, and the child ate them happily.
"Does it still hurt?" Li Yi asked again.
"It doesn't hurt anymore. It's warm," the child said honestly.
Li Chengqi was stunned. He didn't think that there was a problem with the stomach feeling uncomfortable because of hunger. He was shocked by Li Yi's diagnosis.
He just pressed and the child spat out a mouthful of food, and he knew that the child was hungry. He could even tell that the child didn't eat last night?
"Who else is hungry? Come and eat less. There's lunch at noon. How can the Li Family Zhuangzi lack food for the children?"
Li Yi shouted to the other children.
Sure enough, many children came back and wanted to eat.
"Is it because you don't eat?" Li Chengqi wanted to learn, but the miracle doctor didn't do it just now.
"It's because of the soup. If you don't drink soup, you'll be fine. There's oil in the soup, and the stomach will naturally absorb it. Otherwise, the stomach will realize that it's empty and slow down the gastric acid secretion. Then, you won't feel hungry anymore. "
Li Yi explained the reason. Hunger was the feedback of the gastric acid stimulating the gastric mucosa.
If you drink a lot of water, you won't feel hungry for a while because the water dilutes the gastric acid.
Li Chengqi: "…"
He felt that he was not suitable to learn medicine, at least not from Brother Yi. It was too difficult. What nonsense was that?
"What about now?" he asked.
"If you eat a few skewers now, the gastric acid will be diluted, and the gastric acid will secrete more. By noon, you can eat a lot of food. You won't eat less than ordinary adults."
As Li Yi spoke, he scooped a spoonful of soup and drank it. It was cold outside.
"Yes, a half-grown boy will eat until I'm poor," Li Chengqi said.
"Li Dongzhu, do we also eat for free?" a man from a rich family came over and asked Li Yi.
"Don't you feel embarrassed?" Li Chengqi retorted.
After saying this, Li Chengqi left in a hurry. The competition should be over, right? It was time for the next competition. Then, they would eat.
Li Yi didn't answer such a boring question and continued to check on the children's physical condition.
When he was checking, he was learning. Sometimes, he even checked the children's pulse to compare.
During lunch, the children from the rich family went to the Zhang family's village. The children who came by themselves were arranged to sit in a corner of the cafeteria. Each of them had a bowl of moo shu pork covered rice and a bowl of shredded radish soup.
The children laughed. They thought that they would only have a bowl of noodles. It was good enough to have a bowl of noodles.
In the end, there was meat, eggs, fungus, and cucumber slices. The shredded radish soup was also delicious.
Therefore, they decided to come again tomorrow and call their other friends.
"Dongzhu, they will definitely come tomorrow," the cub said in line with human nature.
"Tomorrow, let them eat twice-cooked pork. Make it with garlic and don't put chili. I don't have any chili for others to eat."
Li Yi agreed with the cub's words and told them about tomorrow's meal arrangement.
"Dongzhu, I'm saying that they are greedy." The cub regarded itself as a member of Zhuangzi and felt distressed about giving away things for free.
"I didn't dare to give them fatty meat today because I'm afraid that their gastrointestinal tract won't adapt if they don't eat oil for a long time. Moo shu pork is just right to regulate their gastrointestinal tract. Tomorrow, they will eat twice-cooked pork covered with garlic to stimulate their gastrointestinal tract. The day after tomorrow, they will eat braised pork covered with rice."
Li Yi continued as if he didn't understand or didn't hear what the cub said.
"Dongzhu, I've finished eating. I'll replace Taohong to take care of the babies." Cui Liu put down her chopsticks and went out.
"I'm done too," said Han Yan in a vague voice as he stuffed the last mouthful of food into his mouth. He hadn't swallowed it yet.
"Dongzhu, I'll tell them later." Qing Song took the initiative to take on the heavy responsibility of telling the four people about Zhuangzi's situation.
"Selling newspapers requires manpower. If you don't take care of your body, how can you run to various places to deliver newspapers?" Li Yi said something that the four newcomers didn't understand.
His movable type had been made. It was copper movable type.
Movable type was not easy to take care of in winter and could easily be poisoned, so he didn't touch it. When the weather was warmer and there were more protective measures, he would change it.
Each movable type was made of money, made of smelted copper coins and ordinary copper.
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