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Many viewers' emotions have been completely out of control.

In their lives, only intimacy with cats and dogs.

Who is fine to hang a snake around his neck, not to mention a highly venomous snake, this snake is still very grumpy now.

The new audience at station B felt that the anchor must be crazy, falling into two emotions: puzzled and shocked.

Liu Wei looked at the barrage and smiled, "Brothers, don't be too excited. It's actually very gentle. I feel like I'm surrounded by a ribbon. I can feel the coolness around my neck. It's very comfortable at the current temperature, otherwise you try test?"

"roll!"

"roll!"

"Try a hammer!"

"Laozi hasn't found his wife yet!"

The audience looked disgusted.

Everyone knows that Liu Wei is joking, not to mention that there is no distribution of western cobras in the country. A normal person's brain will certainly not learn Liu Wei to try this terrible behavior.

"Hahaha, make a joke, it is necessary to remind non-professionals, don't imitate!", Liu Wei smiled, "The reason why I want to control its head, the most important thing is to show everyone its venom Let’s see why this big cobra can be ranked in the top ten of the world’s deadly viper!"

Having finished, Liu Wei took out a professional poison taking cup from his backpack.

Adjust live camera.

Focus!

Make sure that the audience can clearly see the moment when the Western Cobra bites.

Hold the poison cup in the left hand.

The right hand added a little force to press the head of the western cobra, its upper jaw and lower jaw staggered a little.

When Liu Wei sent his head to the position of the cup of the poison cup, he bit through the film and swayed his head hard.

Liu Wei was tied up.

Venom flows out of the transparent cup wall.

There is not much venom discharged from the Western Cobra at one time.

Liu Wei's palm can feel its struggling strength, it is indeed very uncomfortable.

"OK!"

Liu Wei took a little effort and removed the snake's head from the mouth of the cup.

Then the intelligent snake control device provided by the system was taken out of the backpack, and the western pseudo-cobra was placed on the snake control device, so that he did not have to worry about being attacked by the snake when he was facing the popular science venom.

Liu Wei shook the sun with a poison cup and smiled with satisfaction, "Brothers, have you seen this? We have already obtained its venom.

It's my turn to prove it!

There should be a lot of venomous snake mysteries in the live broadcast room. If you have read relevant information about the ranking of the world venomous snakes, you will find a problem. There is a difference in the ranking of the western cobra in the top ten.

Some information shows that the ranking is relatively high, some is relatively low, and some are just ranked tenth! "

"I have seen some popular science about snakes, it seems to be ranked tenth!"

"The Baidu Encyclopedia I read seems to be the eighth!"

"I've seen a sixth row, it's too forward, I don't feel very reliable!"

As Liu Wei expected, the answer given by the snake fans in the live broadcast room was not uniform.

He popularized: "Talking about the toxicity of venomous snake venom, let's first recall a standard that is often talked about by old people, the LD50 value, which is half the lethal dose.

I have mentioned this standard before, and I did not give you a detailed introduction to the measurement method of LD50 value. I will add it today.

We must be aware of the common sense that the toxicity of the same kind of snake will be different due to many factors such as environment, gender, age, food intake and so on. Just like the venom in the poison cup in my hand, under such a harsh environment, the poison The protein will be destroyed quickly, and snake venom is not easy to preserve in the outdoors.

From this, we can deduce that LD50 will have different test results.

We all know that the common experimental object is the mouse, and the default object of the toxicity experiment is the mouse.

There are four common injection modes, namely meridian injection, intraperitoneal fixation, intramuscular injection and subcutaneous injection. When comparing the toxicity of all venomous snakes, they can only be compared in the same injection mode. The currently accepted injection mode in the industry is subcutaneous injection because The closest to a real bite, the venomous snake's fangs release the venom by biting through the muscle layer.

I say this, you should be able to understand it! "

"OK! No problem!"

"Look down on who? Anyway, graduated from high school!"

"Barely understandable!"

"Awei, you speak directly!"

"Good!" Liu Wei nodded. "After the subcutaneous injection, the LD50 value obtained shows that the western lethal cobra has a lethal dose of 0.473mg/kg, ranking it just tenth.

So the snake science videos you saw at Station B are relatively professional, and I personally prefer the mainstream views in the industry. "

The audience unanimously shot a barrage of approval.

They believe in Liu Wei's professionalism.

The main reason is that the live science popular face-to-face contact with the Western Cobra is several times stronger than those playing video and PPT science popularization, and it reflects the professionalism of Liu Wei.

Liu Wei looked back at the western quasi-cobra wrapped around the snake-controlling device.

Turning back: "After talking about the rankings, let's talk about the harm caused by the western cobra venom to the human body. Everyone listens carefully and may be able to use it in a crisis.

When the Western Cobra is attacking, it has a habit that it does not expel venom at once. It should be said that many venomous snakes of the Cobra subfamily will keep their hands and watch their changes.

When it bites on the body, only half the amount of venom injected into the body means that the other half may be bacteria in its saliva or mouth. "

"Hahaha, slobber, I'm laughing!"

"I am not afraid of saliva, I have it too!"

"Come on, Cobra, we spit each other!"

"The anchor described it as too much fun, I laughed to death!"

"The effect of the program, the effect of the program!" Liu Wei smiled and then said seriously, "So the power of the wound is lighter than the bite of many other viper snakes.

But don't take it lightly, you must pay attention to it and receive treatment as soon as possible.

We have said that the snakes of the Cobra family are basically anterior groove tooth venomous snakes, and the detoxification volume is relatively small compared to tube dentistry. The toxins of the venom are mainly neurotoxins. The same is true of the venom of the western cobra venom, and it also contains a certain amount of cardiac toxins.

But the most terrible point of its venom is that the snake venom injected into the body will produce symptoms of blood coagulation loss.

Coagulation function refers to the ability of the process of changing blood from a flowing state to a non-flowing gel state. The essence is the function of transforming soluble fibrinogen in plasma into insoluble fibrin.

This is also the main reason why the western cobra is classified as a deadly viper. Once the victim has abnormal coagulation function, the mortality rate is very high.

In addition, after being bitten by a western cobra, there may be abdominal pain, breathing disorders, dysphagia, cramps, drooping eyelids, hemolysis, and myocardial occlusion.

These are common symptoms after being bitten by a cobra. Remember, you must treat it in time! "

"Understand!"

"Note it, note it!"

"In short, hitting 120 is right!"

"..."