Chapter 596: Capsaicin is a smoke bomb

The leaders of the Defense Work Committee naturally attached great importance to this rare event.

Gao Zhendong took the initiative to offer to be the convener and said it was a good thing, so it must be a good thing.

He didn't even ask Gao Zhendong what he was. It was enough for him to know that he was in the field of radar. He could ignore everything else for now. When people came and learned how to use it, they would naturally know.

As for Gao Zhendong, is he kidding? Haha, you are the one who is kidding.

However, it takes time to gather people together. After Gao Zhendong made this call, he put the matter aside.

He now has to do two things.

One is to modify this circuit and directly connect the hardware multiplier to the internal data bus of DJS-60D. In this way, although the hardware multiplier is not directly built into the CPU, at least under the existing technical conditions, the multiplier and the computer core are connected together to the greatest extent, and the high speed of the internal data bus can be fully utilized. Otherwise, all the time is spent on communication, which is slower than the damn DJS-59 calculating by itself.

This operation is just like the earliest dual-core product launched by Intel after being frustrated by AMD - the glue dual-core. Don't worry about whether it is glue or not, just look at whether it is a dual-core.

The second thing is to start working on the ICization of the hardware multiplier. Once completed, it can be combined with the CPU and DRAM to form a primitive DSP device. Although this operation is more like Intel's 80386 CPU plug-in 80387 math coprocessor, no matter what method is used, the question is whether it can process digital signals.

Moreover, Gao Zhendong's starting point is DSP, so there will definitely be some differences from 386+387.

Not to mention this long-term goal, just the circuit board in Gao Zhendong's hand, which looks like it has flying wires all over the place and is in tatters, is enough to make the Russians cry with envy.

In fact, if they get Citibank now, they will also be greedy.

Thinking of this, Gao Zhendong asked someone to bring a file and said, "Well, I'll polish the chip first. Before it is integrated into IC, everyone can only use it without knowing what it is made of."

It’s not that I don’t trust my comrades, but that I don’t trust my enemies.

Han Xin: I am familiar with this job.

Gao Zhendong: Get lost! I am ashamed to be associated with you!
-
It will take some time to get the multiplier circuit board out, but the work of other comrades cannot wait.

On Tuesday, Gao Zhendong rushed to Beijing University of Technology as usual. His courses were "Principles of Automatic Control", "Data Structure" and "Integrated Circuit Design". He had not yet finished the course of "Principles of Automatic Control", as the content of this course was incredible.

As for data structures, we have a new group of students. We teach one group in one semester and then another group.

As for integrated circuit design, we went to classroom 61. Professor Gao taught a class on the SZ61 supporting plan design work site. If you have any questions, you can ask him and he will answer them on the spot. If you have any remaining questions, you can go to his office in the afternoon to ask.

As for asking Gao Zhendong to sit in classroom 61 all afternoon? How dare you say that? Professor Gao is not working anymore, right?
Want him to work in the classroom? If Professor Gao takes out his work and puts it in the classroom, then everyone in the classroom will have to stop working and make room.

While Gao Zhendong was answering questions from his comrades and happily enjoying the lively atmosphere in Classroom 61, Lecturer Zhang arrived.

She timed her arrival perfectly, just when the get out of class was about to end.

When Gao Zhendong saw her, he knew that she came here for the tear gas issue. He waved and pointed to an empty seat, asking Lecturer Zhang to wait a moment, as he was helping the students solve their problem.

Lecturer Zhang couldn't help but feel envious when looking at the huge and bustling design scene. Professor Gao really thinks this is a grand occasion.

In the field of scientific research, scenes like this of more than a hundred people working hard together are still very impactful, especially for comrades who are also engaged in scientific research.

After finishing the guidance work, Gao Zhendong called Lecturer Zhang: "Teacher Zhang, let's go, I'll treat you to a meal, haha, we can talk while we eat."

Even decades later, under normal circumstances in the workplace, it is always the higher-level people who treat the lower-level people to a meal, otherwise they cannot afford to lose face.

After getting their meal, the two found an empty corner of the cafeteria and sat down, talking while eating. Lecturer Zhang didn't think much of it. Professor Gao looked like a busy man, so it was good enough that he could squeeze out time to eat.

In fact, it's not that serious. Mainly because with the change of his position, Gao Zhendong is less and less accustomed to being alone with women who are about the same age or not much older than him in the office. Unless there are special circumstances, he tries to resolve things in public.

Tear gas is not something that needs to be kept secret, and it is okay to talk about it in public.

Seeing that Gao Zhendong's dishes were all spicy, Lecturer Zhang joked, "It turns out that Professor Gao likes spicy food. No wonder he came up with the idea of ​​tear gas, and he used capsaicin as the tear gas."

Gao Zhendong laughed and said, "That's probably partly the reason. I was choked when I poured the chili oil on him, so I naturally came up with this idea."

In fact, for smoke-type tear gas, capsaicin is not the best tear gas. Capsaicin can be used for spraying, but it is not so good if used to produce smoke. This thing is not a gas or smoke by nature, but a solid, and its boiling point is quite high, almost 470 degrees. In short, it is not a good choice if you want to produce smoke.

Especially under current technological conditions, according to Gao Zhendong's previous life, CN (chloroacetophenone) is called the first generation of tear gas, CS (o-chlorobenzylidenemalononitrile) is called the second generation, and OC (capsaicin) was not used until the third generation. There is a reason for this. But this matter cannot be discussed now.

Lecturer Zhang continued the conversation: "Then Professor Gao, how can we get capsaicin? Which kind of pepper is more suitable?"

Gao Zhendong pretended to think about it and said with a smile: "It's probably chili pepper. I haven't studied the types of chili peppers, but the spiciest one I've ever eaten is chili pepper. If you decide to use capsaicin as a tear gas, you can go to the Academy of Agricultural Sciences and ask."

Lecturer Zhang was very perceptive and understood what Gao Zhendong meant: "Professor Gao, do you have any other recommendations?"

Gao Zhendong shook his head: "Let's talk about that later. Let's talk about capsaicin first. To extract capsaicin, the simplest way is to ask comrades who specialize in chemistry, such as extraction methods, which should be possible. In fact, it can be synthesized artificially, but it is more troublesome."

In fact, there is another method, biological production, but it is a bit abstract in this era.

"There are so many methods? Can you give some examples?" Lecturer Zhang knew about extraction, but artificial synthesis was a bit beyond the scope.

Gao Zhendong recalled the situation, but he couldn't remember the specific method clearly. Just because one likes to eat chili peppers doesn't mean one has to produce capsaicin, but he still remembered the abstracts of some papers.

Besides, capsaicin was originally a smokescreen he put up to facilitate the implementation of the project.

"For extraction, you can consider using ethanol leaching, alumina column chromatography, and ether crystallization, which will give you a mixture of capsaicinoids."

This is one of the simplest methods to extract capsaicin, and the materials used are also the most easily obtained. Natural capsaicin is a mixture that contains capsaicin, dihydrocapsaicin, and a bunch of other things.

At this point, Lecturer Zhang was already beginning to feel dizzy. She could still understand a little about ethanol extraction and ether crystallization, but alumina column chromatography was slightly beyond her knowledge structure.

But it doesn’t matter, because Professor Gao is here. At this time, she admires Gao Zhendong even more. This comrade really seems to know everything.

"What about artificial synthesis?" First find out and learn about various methods.

Then she could understand every word Gao Zhendong said, but when they were put together it sounded like a mystery.

"There are many artificial synthesis methods, I don't know much, but you can use 3-methoxy-4-hydroxybenzylamine hydrochloride as the raw material..."

At this point, Lecturer Zhang was completely confused. Who am I, where am I, and what am I listening to?

She was eating and talking, and taking the time to record Gao Zhendong's words in her notebook, but she couldn't help but stop writing.

The main thing is that I don’t know what to write in the notebook. Artificial synthesis is indeed beyond the scope of the curriculum.

"Haha, Director Gao, this artificial synthesis seems a little complicated."

Seeing her stop writing, Gao Zhendong probably guessed that she was in some trouble. To be honest, he was shocked that he still remembered this string of bird stuff.

"It's indeed a bit complicated. Let's not talk about the details for now. I'll first tell you the shortcomings of using capsaicin here." Gao Zhendong said with a smile.

"Oh, okay, okay, thank you." Lecturer Zhang felt that Gao Zhendong's suggestion was correct. First, know the shortcomings, and then analyze how to use it, whether to use it or not, and finally the question of how to do it.

"There are many disadvantages. The first is that natural ones are very expensive, and synthetic ones are troublesome."

Even decades later, the price of natural high-purity capsaicin will still be tens of thousands per kilogram. However, it is not a big deal to use it in weapons, as the weapons themselves are not cheap and not much is needed in each smoke bomb. The price of synthetic capsaicin is relatively low.

After carefully asking about the details of this problem, Lecturer Zhang felt that this was not a big problem. At most, it could be synthesized. Although it sounds troublesome, Professor Gao should understand it.

"What about other shortcomings?" If there is a first one, there may be a second and a third.

"Secondly, this thing can be used as a spray, but it's not very useful for smoking."

Gao Zhendong first explained to Lecturer Zhang the morphology and physical and chemical properties of synthetic capsaicinoids, and then specifically reminded him: "As for natural capsaicinoids, since they are a mixture of multiple substances, these properties are not fixed, but change. The peppers you use for extraction have different origins, so even if they are the same variety of peppers, these data will change."

It seems that natural ones are useless, Lecturer Zhang thought. What he fears most is something like this that has no fixed value and keeps changing, not to mention that it is expensive.

But the most troublesome thing is not this problem. The most troublesome thing is that no matter whether it is natural or synthetic, it seems that it is a bit troublesome to spread.

(End of this chapter)