Blood type theory is one of the important foundations of surgical operations. Only with blood type theory can safe blood transfusion be achieved and many surgical operations can be performed.
Li Ang took out the tools he had prepared in advance from the medicine box he carried with him - a large number of syringes, glass pieces, glass test tubes, and the turret human centrifuge he had used before at the Duke of Yan's mansion.
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Li Ang drew a small amount of blood from the arms of himself, Yang Yu, Li Wei, Zhang Yuyan and several other academy classmates, put it into a glass test tube, and labeled it.
Then from each test tube, take a small amount of blood at a time, drop it on the glass slide in pairs, and mix it with each other.
Under the gaze of Dr. Xuegong and the students, the blood in some blood samples began to condense into clumps, while others merged with each other.
In order to further verify, Li Ang took a small amount of blood from Su Feng and some other volunteers and experimented again, but the results were still the same.
"The blood donors come from all over the world and had no contact with each other before coming to the Academy. It would be too much to say that they are related by blood. Therefore, the blood test method of blood test is also wrong."
Li Ang said: "However, it is not enough to prove this. We also need to understand why some blood can blend and some blood cannot.
What exactly is the problem?"
Li Ang used a turret human centrifuge to extract half of all blood samples and centrifuge them.
After blood coagulation, the upper layer of pale yellow transparent liquid is serum, the middle layer of white solids is white blood cells and platelets, and the bottom layer of red solids is red blood cells.
After separating the serum, Li Ang placed the serum into a new set of glass test tube containers and labeled them.
Then mix the blood cells and serum in pairs and make a table based on the results.
"Have you noticed? After centrifugation, a person's own serum and blood cells (blood cells) will not react when they meet each other."
Li Ang said: "When different people's serum meets blood turbidity, sometimes there will be a reaction, and sometimes there will be no reaction."
Su Feng asked curiously: "Why is this?"
"I believe that serum and blood each contain special substances. I call them antigens and antibodies."
Li Ang said: "When antigens and antibodies of the same type meet, they will fight each other and react. It's like fire meeting firewood.
When different antigens and antibodies meet, there will be no reaction and they can live together in peace.
If a person's blood contains A antigen, then his serum will not contain A antibodies, but B antibodies.
If the blood turbidity contains B antigen, then his serum does not contain B antibodies, but contains A antibodies.
The former is blood type A, and the latter is blood type B."
"Wait a minute, what about Li Wei's blood?"
Su Feng asked: "His blood turbidity will not react with any kind of serum, but his serum will react with other people's blood turbidity."
"Yes, so there is neither A nor B antigen in Li Wei's blood.
Correspondingly, his serum contained both A and B antibodies.
This is type C blood.
On the contrary, blood type A and B contain both A and B antigens in the blood turbidity but no A and B antibodies in the serum."
Li Ang wrote and drew on the form, "Roughly speaking, people can be roughly divided into four blood types.
Type A, type B, type A, B, and type C.
If blood type A and blood type B meet, the blood will all agglutinate due to the reaction of their respective antigens and antibodies.
When type A blood and type A and B blood meet, half of the blood agglutinates and half blends.
Is this considered fusion? Or not?
In a blood test, as long as the blood types are the same, even if there is no blood relationship, they will all blend together without agglutination.
If you want to further verify it, it is very simple. You only need to expand the number of samples and let hundreds or thousands of people conduct blood type testing, and you will be able to figure it out."
Li Ang's expression was calm and calm. He knew that once the blood type theory is promoted, it will inevitably be recognized as true - no one wants a stranger to suddenly appear and use the method of bone testing to seize their family property.
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Therefore, the blood group theory must be true, and it can only be true.
Su Feng asked again: "Wait a minute, since people have four blood types, what blood type will the child born when the parents have different blood types?
If a person with type A blood and a person with type B blood get married, they will give birth to type A and type B. If things go on like this, the world should be full of people with type A and type B blood."
"So I'm thinking that there may be randomness in blood type inheritance."
Li Ang said: "If a person with type A blood and type B blood get married, they can give birth to a person with type A, type B, type A, B, or type C blood.
If a person with type A blood and type C blood get married, they should also be able to give birth to a person with type A or type C blood.
These need to be further expanded and verified.
But one thing is for sure,
The blood test is completely wrong and has no usability.
If we really take this as a golden rule, we don’t know how many unjust, false and wrongful convictions and human tragedies will occur.”
Li Ang made a conclusion for this large-scale experiment. Zhang Yuyan in the crowd saluted him gratefully, and Yang Yu also bowed his hand gratefully.
Thanks to Dr. Karl Landsteiner who proposed the blood group theory.
Li Ang waved his hands towards them, saying not to worry, thinking silently in his heart.
Under the banner of overthrowing the decadent blood test theory, and coupled with the intellectual curiosity of the academic doctors, we should be able to further advance the development of blood type theory soon.
For example, a person with type A blood and type A blood may give birth to a person with type A or type O blood.
People with type AB blood and type AB blood may give birth to people with blood types A, B, and AB.
Completely finalizing the blood test.
"The next step is the actual operation of blood group theory - blood transfusion."
Li Ang said silently: "As long as the fear and ignorance of blood among the Yu people can be overcome, blood transfusion can be used openly as a first aid method.
By the way, I don’t know if the monk Jing from Bosihu Temple yesterday was hit by mistake or something.
The recent bloody disaster actually made him half right..."
Tap tap tap.
Just as he was thinking, a servant of the academy came quickly and said something to Li Wei.
After Li Wei heard the news, his expression changed suddenly and he immediately ran to Li Ang, "Ri Sheng, General Yunhui's son was injured in the martial arts field at home. He is in urgent need of medical treatment. Can you please come with me?"
.."
"Huh? What's going on?"
Li Ang took a leave of absence from Dr. Su Feng, and immediately took the medicine box and followed Li Wei to the west gate of the academy, where the carriage of General Yunhui's family was already waiting.
After getting on the carriage, the servant at the general's residence told the truth - General Chen Changxiao of Yunhui had a son late in life. His eldest son had been learning martial arts passed down from his family since he was a child, and he was almost old enough to take the imperial examination.
Just now, Chen Changxiao wanted to test his son's martial arts skills. His son accidentally fell from his horse during the martial arts performance. His thigh was scratched by the sword and he was bleeding.
"The sun rises..."
"I try my best."
Li Ang comforted Li Wei, saying that General Chen Changxiao of Yunhui was Li Wei's recommender. During the Academy Examination period, Li Wei also lived in Chen Changxiao's mansion, and he and the sons of the Chen family were considered brothers.
However, it can make people from the Chen family come to the Academy for help...
This sword wound is probably not serious.
This chapter has been completed!