Escape the Library

【Chemical Reaction-04】

During dinner time, there are more and more people in the staff canteen. Many workers are eating and chatting with their meals, looking relaxed. Judging from their performance, they are used to eating here after get off work every day, and everyone's meals are the same. Yes, play directly from the window. That is to say, if the library does anything in the meal, hundreds of workers who eat in the cafeteria will be recruited, and it becomes a method of "indiscriminate attack".

Send them to a chemical factory, assign them to different jobs, and then poison everyone to death... From what Yuexingwen understands, the library will not do such "irrational" things.

On the research group channel, Ke Shaobin typed and asked: "Can these meals be eaten? I have listened to Qin Lu chatting with people for 5 minutes, and the others have already started. Wouldn't it be strange for us to stay like this?"

Xin Yan said: "Wait a moment." He picked up his chopsticks and carefully pulled the dishes and rice on the plate to see if there was anything wrong. After a long time of inspection, nothing was found. Xin Yan typed: "The food looks fine, and there is no abnormal taste or traces of medicine. Of course, if there is a colorless and odorless highly poisonous, it cannot be detected by the naked eye. Do you want to eat it?"

Yue Xingwen said simply: "This class has a reasoning part. The library will not directly poison all the people in the factory at the beginning. In that case, all the current clues will be meaningless. To be safe, everyone should pack the food first. Go back to the dormitory and see if there is anything wrong with the other employees after eating, and if it's okay, it proves that the food in the cafeteria has no pits, and you can eat it with confidence."

Everyone agreed with this approach, and they all found packing boxes and brought the meals back to the dormitory.

The building has a total of 5 floors, and the staff dormitory area is above the canteen.

Zhang Xiaonian and Xu Yishen live in 301 in the far east, Zhuo Feng and Liu Zhaoqing are next to them in 302; Xin Yan and Ke Shaobin in 416 in the far west, Jiang Pingce and Yue Xingwen live in 415; there are few female employees in the chemical plant, and the girls live in accommodation All at the top. Senior Sister Lin and Senior Sister Lan 507, Qin Lu and Qin Miao 508.

That is to say, their 12-person accommodation is very scattered, not only on different floors, but also vertically far apart. Yue Xingwen guessed that this arrangement is likely to be for the later "escape" link. After all, in addition to solving puzzles, this course also has the assessment condition of "leaving the chemical plant alive".

After entering the dormitory, Yue Xingwen and Jiang Pingce sat on the bed facing each other, putting the packaged food aside first. The research group channel sent a reminder from Liu Zhaoqing: "Eating something with poison will affect the human body after gastrointestinal digestion. It should take about 2 hours. If it is highly poisonous, there are also examples of poisoning and death within 5 minutes. Be safe, we Wait two hours."

Ke Shaobin said seriously: "After 2 hours, the food will be cold, and there is no microwave in the dormitory. It is not good for the stomach to eat cold food directly. You can ask Xin Yan to turn on the alcohol lamp and heat it up before eating."

Xin Yan was silent for a moment, then looked back at Ke Shaobin: "It's pretty useful to be a cook, right?"

Ke Shaobin adjusted his glasses and smiled sincerely: "Without you, we would have starved to death several times in our previous classes. Your alcohol lamp and decanter are very useful, really."

Although Xin Yan had a serious face, when he heard this, he raised his right hand slightly, summoned an alcohol lamp, lit it, and handed it to Ke Shaobin, meaning, you will cook your own food later.

Ke Shaobin felt like he had a treasure, he quickly took the alcohol lamp and put it on the table.

On the research group channel, Yue Xingwen began to summarize clues: "Everyone will post what they have found here for discussion." He repeated the content of the plan he just saw, and Jiang Pingce made some additions.

Xin Yan read the molecular formula and said: "4-[bis(2-chloroethyl)amino]phenylbutyric acid, looking at the molecular structure, it should be an aromatic nitrogen mustard derivative. This is a double alkylating agent, Brother Liu Do you know what this medicine is for?"

There was no detailed drug description in the plan, just a lot of molecular formulas, reaction equations, raw material lists, etc. Yue Xingwen and Jiang Pingce could not understand them all, so they wrote them down for other students to analyze.

Liu Zhaoqing is a medical student who has studied pharmacology at the undergraduate level. After reading the news, he touched his chin and recalled it carefully for a while before saying, "It looks like an anticancer drug for chemotherapy that I have learned before, which is suitable for chronic lymphocytic leukemia. , Hodgkin's lymphoma and other cancers, is a cytotoxic drug."

Xu Yishen asked: "There are several mechanisms of action of cytotoxic drugs. Does it affect the production of active enzymes, or does it affect cellular genes and affect DNA transcription and replication?"

Xin Yandao: "According to my understanding, this dual-function alkylating agent may produce alkylation, acting on the helical chain of DNA, destroying DNA replication, and inhibiting the growth and spread of cancer cells."

Ke Shaobin was sitting beside the bed. Seeing Xin Yan, who was analyzing the chemical drug with a serious expression, he couldn't help but sigh: "It's like a mountain, I didn't understand it anyway."

Yue Xingwen typed: "The liberal arts students can't understand it."

Biology, chemistry, and medicine are inseparable disciplines. Liu Zhaoqing, Xu Yishen and Xin Yan can easily understand the mechanism of action of cytotoxic drugs. Students from other majors watch their discussions, but it is like listening to heaven... What kind of aromatic nitrogen mustard derivatives? Double alkylating agent, I know every word, but I really don't know it together.

Ke Shaobin concluded: "Xin Yan, say something simple and easy to understand!"

Xin Yan put it another way: "That is, an anticancer drug that acts on genes. This is what the chemical factory will produce next. From the molecular formula, there is no obvious problem. It is not like a toxic drug that can cause genetic mutation."

Ke Shaobin understood: "In other words, on the surface, the drugs produced here are not poisonous? Is it a normal chemical factory that produces anticancer drugs? Including the ones you saw in the laboratory before, sodium cyanide. It is poisonous in itself, but after the reaction, it will also become non-toxic and used as raw materials for other medicines?"

Xin Yan nodded: "That's right. The chemical factory did not produce illegal drugs. I looked at the reactor and there were no dangerous items that would explode. Even if a chemical murder case did occur, it would be a personal act."

Yue Xingwen changed the topic: "Suppose someone uses the chemical knowledge they have learned to kill people? Since sodium cyanide appears in the factory's material list, can it be used as a murder weapon?"

Xin Yan said: "Sodium cyanide is easily soluble in water and is a highly toxic chemical raw material that is strictly regulated. A small amount of it is enough to kill humans. If someone puts it into drinking water, of course, it can kill the target unconsciously. "

Jiang Pingce said in a low voice, "Since this exam has put us in a chemical factory, both the deceased and the murderer must be inside the chemical factory. The murderer uses chemical knowledge to kill invisible, and personnel changes within the factory need to be paid attention to."

Yue Xingwen nodded, typed and asked, "The latest personnel changes in the factory are only three employees who have resigned, right?"

Lin Manluo: "There are only three people who have left. There are five new arrivals. They are all college students recruited by the school in July. We have also compiled a list."

Lan Yarong said: "Peng Yong and Yi Jianqiang went abroad, and Cheng De's wife resigned and returned home due to illness. Their resignation reports were all printed electronically, and the final 'applicant' signed with a black pen, approved and sealed by the company. There is no problem with the process.”

Jiang Pingce immediately grasped the key: "Not all the resignation letter is handwritten, only the signature is handwritten?"

Lan Yarong said: "Yes, the signature may be impersonated. We found that on the duty sheet of the workshop, there are signatures of the employees on duty every day, print a resignation letter directly, and then copy the signatures of the three of them. It is not difficult. Do it. But once the resignation letter of several hundred words is all handwritten, the handwriting is not easy to imitate.”

Xin Yan said calmly: "Now that computers have become popular, it is a common practice for a resignation letter to download a template from the Internet and change it, and then print and sign it. Generally, when an employee resigns, he will have an interview with the boss. You can't pretend, unless they leave their resignation letter and just walk away."

Qin Lu said: "But I checked, and there is a record of the settlement of wages in the finance department. Mr. Peng resigned on August 17, Mr. Cheng resigned on July 20, and both went to the finance department to receive half a month's salary; Mr. Yi was paid in August. I resigned on the 3rd and didn't get my salary for August."

Jiang Pingce frowned and thought for a moment, then suddenly said, "The date of their resignation is a bit strange."

Yue Xingwen looked back at him, Jiang Pingce quickly drew a calendar on the table, and explained: "According to the resignation order of Cheng, Yi, and Peng, July and August are both 31 days, and July 20 is Tuesday. August 3 is Tuesday, August 17 is Tuesday, and the interval is two weeks.”

Jiang Pingce's reaction speed was really fast. When Yue Xingwen heard the result, his eyes widened slightly: "That is to say, every Tuesday every two weeks, one person resigns and leaves the chemical plant?"

Jiang Pingce nodded: "This is definitely not a coincidence."

He sent his conclusions to the research group, and Ke Shaobin couldn't help shaking goosebumps all over his body: "Black Tuesday? Why do I think they didn't resign, but were killed by the murderer!"

Liu Zhaoqing bit the bullet and said, "I checked the date. Tomorrow, August 31, is Tuesday. Will someone disappear again?"

Yue Xingwen remembered that when he walked out of the office this afternoon, he suddenly felt a chill on his back, as if a pair of eyes were staring at him in the dark. He was an atheist, this was not a supernatural course, and it was definitely not haunted in broad daylight.

So, was someone really watching him at the time?

Yue Xingwen took a deep breath and typed on the research group channel: "There is probably a demon lurking in this chemical plant who uses chemical knowledge to kill people. Everyone must be careful. Except in public places such as the cafeteria, there are people who deliver food to everyone in private. Don't eat. Someone asks us out alone, and definitely don't go."

Everyone was typing to express their knowledge.

The "Black Tuesday" proposed by Ke Shaobin made everyone's back feel shivering.

Tomorrow is Tuesday, will the "resignation" thing happen again? Did the three people who resigned before really have something to do at home, or were they "resigned" and actually disappeared from the world?