Everything in the farming affairs was normal, and there were no problems with the methods and strategies. However, something happened to someone.

After Li Mengxi and his field team stayed out overnight for two days, they accidentally caught wind and cold and developed headache, brain fever, cough and runny nose.

When Li Mengxi got up in the morning, he found that his head was groggy. He was keenly aware that something was wrong, and put his hand on his forehead. His forehead was hot, and Li Mengxi suddenly screamed, "Oh shit, I have a fever!"

It was a matter of life, so Li Mengxi quickly summoned the vanguard general Liao Hua, gave a few hasty explanations, and asked Liao Hua to take the remaining people to farm.

After being dumped by Liao Hua, Li Mengxi quickly got on his horse and ran back to Julu.

It had been two days. Li Mengxi had been out alone with his field team for two days. After Liu Bei went to investigate once, he found that Li Mengxi had set up camp and settled in the stronghold. Liu Bei was relieved and did not follow him for the next two days.

In Julu City, Liu Bei was taking Jian Yong to watch the craftsmen making paper. When Liu Bei suddenly saw Li Mengxi coming back, Liu Bei was surprised and asked, "Xi'er, are you back?"

Li Mengxi covered his mouth and nose and said in a hoarse voice, "Someone has caught a cold. Come back and take a look."

When he heard that Li Mengxi was ill, Liu Bei immediately became serious. Liu Bei hurriedly wanted to go to the military doctor with Li Mengxi. Li Mengxi frowned and stopped Liu Bei, "Don't follow, you will be infected easily."

After forcing Liu Bei with stern eyes, Li Mengxi turned around and ran towards the wounded barracks.

Liu Bei was stopped in place, extremely embarrassed.

Meeting Jian Yong's questioning eyes, Liu Bei could only helplessly spread his hands.

When they arrived at the wounded barracks, Li Mengxi directly asked Tian Bu where he was. After a while, Tian Bu came.

Tian Bu thought Li Mengxi was here for a routine inspection. When he saw Li Mengxi, he started babbling. After Li Mengxi listened patiently, he said, "Tian Bu, please take a look quickly. I seem to have a cold."

Already..."

When Tian Bu heard Li Mengxi's hoarse and weak voice, and then looked at Li Mengxi's sickly red face, he immediately reacted, "Ah!" Tian Bu said in surprise, "Quick! Follow me!"

When Tian Bu heard that Li Mengxi was ill, he became nervous. He was nervous from the bottom of his heart.

Arriving at the camp, Tian Bu immediately began to perform medical diagnosis and treatment. During the process, Tian Bu saw Li Mengxi covering his nose and asked with concern, "Military advisor, why do you cover your mouth and nose? Is it uncomfortable?"

Li Mengxi looked outside, and saw wounded soldiers walking around on crutches. His brows furrowed, and Li Mengxi looked at Tian Bu, "Tian Bu, do you still remember the methods of epidemic prevention and the theory of epidemic insects?"

Tian Bu nodded, "Remember."

Li Mengxi said, "I just remembered that the wounded soldiers' camp is different from other places. The wounded soldiers are weak and susceptible to diseases, and the military medical camp is mixed with the wounded soldiers. Every day, there are many sick people walking in and out."

, so wouldn’t wounded soldiers be extremely susceptible to disease?”

You usually don’t notice the problem, but once you notice it, it becomes a big problem.

"In this way," Li Mengxi thought for a while and said, "the wounded soldiers' camp will be moved to another place. The medical camp will be divided into two parts. One is for military doctors, specially designed to treat and care for the wounded soldiers, and the other is for ordinary doctors to treat the remaining people."

"I'll go talk to General Guan later and move the wounded barracks to a quiet place.

Also, be sure to clean the camp for wounded soldiers. It must be so clean that there is no dust in the wind. If there is any lime left, sprinkle some lime everywhere."

Tian Bu carefully wrote down Li Mengxi's instructions.

Li Mengxi noticed that Tian Bu had been staring at his hands, so he simply put his hands down from his nose.

After thinking for a while, he said, "A certain person has an anti-epidemic artifact, the so-called [mask], Tian Bu, do you remember it?"

Of course Tian Bu knew about the mask. Tian Bu nodded and recalled the method of making the mask, "Make thick cloth, palm width, cut into a foot and a half length, sprinkle with strong wine, tie ropes on both ends, cover the nose and hang the ears..."

As he spoke, Tian Bu hesitated, "It's not pleasant to have wine in your nose. Also, there's not much strong liquor left."

Li Mengxi smiled. As soon as he smiled, there was a feeling of stuffiness in his throat. He turned his head and coughed violently.

Tian Bu was very worried when he saw Li Mengxi like this.

After coughing, Li Mengxi looked up and looked at Tian Bu with a smile, "Tian Bu, your military advisor, I have another magic weapon, so there is no need to use strong alcohol!" Li Mengxi said with a smile on his face, his voice was hoarse, and he was extremely happy.

"I'll teach you how to do it, write it down carefully."

"Do you know how to suffocate coal?" Li Mengxi asked Tian Bu.

Tian Bu nodded.

Li Mengxi continued, "The key is to make charcoal, suffocate the charcoal, take some good charcoal, crush it into the size of soybeans, and then put the crushed charcoal on the pot to steam.

After steaming, the charcoal becomes alive, which is called activated carbon.

You might as well try it with ink. Put a drop of ink in the bowl, pour the activated carbon into it, and the water will turn white when you brush it."

"Charcoal is cheap, cheaper than wine. It doesn't cost much to burn a kiln of charcoal. One kiln of charcoal can last the entire army for several years.

Tian Bu, go to Zichongying later to get some cloth. Find a cloth with a fine texture. Use two layers of cloth, the outer layer and the inner layer. Fill the middle with activated carbon, then seal it, just like a mask, cover it on the

Just put it on your mouth and nose.”

"Remember, everyone in the military medical camp must wear masks every day in the future.

It doesn't matter whether others take them or not. You military doctors are in daily contact with patients. If you get sick and treat others, it will be passed on from ten to ten, and you will not be able to prevent it..."

Li Mengxi came to see a doctor, but he gave Tian Bu a lot of instructions while seeing a doctor.

After Tian Bu checked his pulse, he found out that the military advisor had indeed felt cold. He got up and Tian Bu went to get some medicine.

After a while, Tian Bu brought a packet of medicine to Li Mengxi and asked him to cook it and drink it as soon as possible.

Li Mengxi trusted Tian Bu's medical skills. After getting the medicine, he bowed his hand to Tian Bu and Li Mengxi went back.

——

Outside the camp, Liu Bei and Jian Yong were waiting there. When they saw Li Mengxi coming back, they hurried up to greet him.

Li Mengxi didn't care. He raised the medicine in his hand and showed it to the two of them, "I'll go back and boil the medicine."

When he returned to the city lord's palace and turned the medicine jar out and added water to boil the medicine, Li Mengxi was thinking, why does the medicine need to be boiled?

After thinking for a while, I probably understand.

In ancient times, the ancestors of the Chinese people discovered that animals would eat some plants after being injured. Out of curiosity, the ancient ancestors imitated the appearance of animals and tasted herbs.

This chapter is not finished yet, please click on the next page to continue reading the exciting content! In this way, ancient people discovered that after eating some herbs, they can relieve pain and make the injury heal faster.

This is the earliest development of Chinese herbal medicine.

Later, as it developed, some people began to take the initiative to taste herbal medicines and identify their effectiveness. This was a series of ancestors represented by Shennong.

Later, as development continued, the ancestors discovered that herbs were hard to eat, and branches, bark, and the like were difficult to eat. At the same time, the age of fire entered, and the ancestors discovered that putting herbs in water

Boil it and drink the water, it can also cure diseases.

From here on, it progresses all the way to the boiling step, and the most advanced extraction method of traditional Chinese medicine has been established for a long time.

But, after reaching this step, it’s over.

From ancient times, to the Han Dynasty, to the Song, Yuan, Ming and Qing dynasties, during the long period of time, the ancients failed to take a step forward in the extraction of medicines. The original boiling method was still used to extract the active ingredients of medicines.

Boiling can indeed extract many substances and is very effective, but this method is not sufficient and has great limitations.

For example, artemisinin, which can cure malaria, is not resistant to high temperatures and will decompose and denature when boiled. Therefore, artemisinin is taken raw with a bowl of water and the juice.

When he was making paper, he soaked wheat straw in alcohol to test the decolorizing effect of alcohol. At that time, Li Mengxi figured out a truth, which is the principle of molecular motion.

That is, water at 30 degrees Celsius has much more molecular activity than water at 10 degrees Celsius.

That is to say, the medicine can be boiled at low temperature. It does not need to be so high. It can be boiled with water of 30 to 50 degrees. In this way, it is not easy to destroy the properties of the medicine. At the same time, the water has a certain temperature and the molecules are very active. In warm water,

More medicine can be extracted by leaving it in cold water for a day than by soaking it in cold water for a year.

While simmering the medicine and smelling the weird smell coming from the medicine jar, Li Mengxi was thinking that boiling the medicine at low temperature must be useful. Compared with boiling water, low-temperature boiling can directly increase the extraction efficiency of the medicine by dozens or even hundreds.

Times as much.

Why can the drug extraction efficiency be hundreds of times higher by just using low-temperature boiling? This is because, according to Li Mengxi's speculation, there are very few substances in nature that can withstand boiling water temperatures of 100 degrees without decomposing or changing their properties.

rare.

Almost ninety-nine percent of the pharmaceutical ingredients are either decomposed or denatured at a high temperature of 100 degrees.

The conventional boiling method is very efficient in extracting medicines. Therefore, this is probably why it takes a year and a half to take traditional Chinese medicine, because the traditional Chinese medicine boiling method is too inefficient in extracting medicines.

Li Mengxi realized that just one method could immediately bring about huge changes in medical technology. As long as the low-temperature cooking technology was invented, just this method could immediately increase the extraction efficiency of herbal medicines by dozens or hundreds of times.

The method was so simple and the effect was so great that Li Mengxi thought about how to achieve the purpose of low-temperature boiling.

The first method he thought of was the pressure cooker he had invented not long ago for papermaking.

The principle of a pressure cooker is that the higher the pressure, the higher the boiling point.

So, the way to lower the boiling point is to lower the air pressure.

Referring again to the manufacturing method of a pressure cooker, the lid of a pressure cooker is poured onto the pot body with molten iron to seal and lock the steam, thereby achieving high pressure.

However, high pressure is easy to achieve, just seal the pot. Low pressure, according to Li Mengxi's understanding, vacuum seems to be the lowest pressure state.

So, the technology to reduce the air pressure seems to be to pump out the gas in the container so that it is lower than the normal air pressure.

This is ridiculous, the low pressure cooker seems to have the same technology as the vacuum machine.

Feeling that the low-pressure technique was a bit difficult, Li Mengxi snorted and began to think of other possible methods.

It is difficult to build a vacuum machine. So, to find a method of low pressure, it seems that you can find a high mountain, such as climbing to the Himalayas, halfway up the mountain. The air there is very thin and the air pressure is very low, which is very suitable for low-temperature cooking of some things.

However, to boil a pot of medicine, you have to climb mountains and ridges. Unless a large medicine factory is built halfway up the mountain, the cost cannot be reduced at all.

Climbing mountains to cook medicine is feasible, and the difficulty is much lower than conquering the technology of vacuum machines, but the cost is not very good.
To be continued...