Perhaps, among many students, only Han Feng can truly appreciate Professor Li Zhongwen's extensive knowledge, truly understand every word he says, and correspond his words to the actual situation in his body. Listening all the way down, Han Feng has been following Professor Li Zhongwen's steps to think, and has solved many problems that he has encountered before. However, although Han Feng listened carefully and understood deeply, he was the only one in the class who did not take notes. Other students, in the face of Professor Li Zhongwen's profound teaching, the pen in their hands has never stopped. This special situation of Han Feng was noticed by Professor Li Zhongwen. So, after lecturing a paragraph, he stopped, touched the direction of Han Feng with his pen, and asked, "This classmate, do you have any questions?"? If you have any questions, you can interrupt my lecture at any time, raise them, and then solve them together. Suddenly, all the students' eyes were focused on Han Feng. Although it happened suddenly,ultrasonic dispersion machine, Han Feng did not panic much, but stood up calmly and picked a question that had been bothering him in a hurry: "Teacher Li, according to the molecular biology theory described in the textbook, the impulse on nerve fibers is an electric pulse that lasts one thousandth of a thousand, which is the conclusion drawn by the winners of the Nobel Prize in Physiology or Medicine in 1963." It is also a generally accepted conclusion, accompanied by another experimental conclusion, that nerve pulses do not produce heat,ultrasonic cutting machine, while the laws of thermodynamics tell us that electronic pulses must produce heat in the process of transmission, that is to say, the two theories are contradictory. My question is, Miss Li, does this mean that the nerve impulse is not just an electrical impulse? “……” Quiet- At this moment, the whole classroom suddenly dropped a pin quietly on the ground and could be heard. All the students showed doubts and confusion on their faces or in their eyes. With their current level of knowledge, they simply could not understand what Han Feng was talking about. Professor Li Zhongwen was obviously surprised. He did not expect that the student could ask such a deep question. Moreover, the question was closely related to what he had just explained. It did not mean that he had to have a high level of knowledge to ask it. However, the questioner was required to have a wide range of science and be able to think positively. Stunned for a moment, Professor Li Zhongwen came to his senses and nodded with a smile. "Please sit down," he said. "Can you tell me your name?" "Han Feng." "Han Feng?" Professor Li Zhongwen read it again, but he had no impression of the name in his mind. Then he continued, "In the future, in my class, I don't need to stand up to ask any questions, ultrasonic welding transducer ,ultrasonic cutting machine, just sit in my seat.". Han Feng, your question is very good! When we study, we should think positively, not always accept passively, but spread our thinking.. Maybe many students didn't hear Han Feng's question clearly just now. Let me explain it in detail. The 1963 Nobel Prize in Physiology or Medicine awarded to three scientists, Sir Eccles, Professor Hodgkin and Professor Huxley, for their work on the control mechanisms of nerves and the basic processes of communication between nerve cells. They concluded that a nerve impulse is an electrical impulse. That is to say, the nerve is "prepackaged" in the nerve membrane composed of liquid and protein, the charged salt particles can pass through the particle channel in the membrane, and the pulse is transmitted from the end of one nerve to another nerve with the help of the charged salt particles. However, as Han Feng said, this conclusion contradicts the conclusion of the laws of thermodynamics and physics, and experiments prove that nerve impulse conduction does not produce heat.. “…… Han Feng may not realize that he has just asked a world problem, a problem that has puzzled scientists all over the world for more than 50 years. Yes, this problem has not been solved yet. Coincidentally, this problem is one of the topics I have been studying. We can discuss, and then express their views, do not worry about saying wrong, this is a world problem, no one will laugh at you, perhaps, you said today's conclusion, is just the right conclusion. Professor Li Zhongwen did not express his views directly, but let everyone express their opinions. Ask a world problem at random? Han Feng felt very helpless, he was just in a hurry, casually picked a question that he could not think of at ordinary times to meet the occasion, but did not expect it to be like this, if he had known this, he would not have asked. The classmates in the class were just a little surprised, but when they heard Professor Li Zhongwen say this, they immediately started talking about it. Shit, this is also the world's problem? I've thought about it before, but I just didn't say it. A boy said sourly. Does electrical transmission necessarily produce heat? Some Dianbai asked the other students. Apart from electrical impulses, what can transmit so fast? Is he the Han Feng? That's awesome!.. “…… Whether it's an electrical pulse or not, is it necessary to be so clear? …… As a result, everyone talked to each other, and the discussion came to an end. Naturally, the problems that have plagued scientists all over the world for decades are not so easy to discuss. When Professor Li Zhongwen left, a classmate asked, "Teacher Li, this is the subject you are studying now. Have you come to any conclusion?" Professor Li Zhongwen looked at Han Feng and said with a smile, "My point of view is the same as Han Feng's. Nerve impulses are not just electrical impulses.". However, the current research is limited to this, and further experiments and observations are needed. Chapter 19-can he really read it? Although Professor Li Zhongwen usually gets along well with his classmates, he is amiable and approachable,ultrasonic emulsifying machine, but he is famous for his academic strictness and can not tolerate any carelessness. In this field, if anyone can get his recognition, he is proud enough. fycgsonic.com