Chapter 376: Hand over to teacher

At six o'clock in the evening, the new graduate students of the Department of Materials were organized to participate in the "Materials Engineering Laboratory Safety and Management" course. The place was in classroom 3208 of the third teaching building. Mo Wenlin, Xu Qiu, and Sun Wo sat in a row to listen to the class.
The instructor is an old professor in the department, Wang Shaoxian, his hair is gray, and his age seems to be 60+.
Wang Shaoxian and Xu Qiu have heard of it. He is a veteran who came in when the Department of Materials was first established. He has very old qualifications. However, he does not have a strong sense of existence in the eyes of students, because the courses taught are relatively obscure professional elective courses "X-Ray Not many people study Diffraction.
Not long ago, an announcement was posted in the Department of Materials, and Professor Wang Shaoxian was appointed as the "Safety Director" of the Department of Materials.
This "security officer" position was not available before, and it is a newly created position in response to the call of the state.
To put it simply, it is responsible for the safety issues of the laboratories in the Department of Materials, that is, it is a silly face.
Therefore, certain qualifications are required to be able to live in the venue. If you choose a green pepper scholar in your 30s, it will definitely be difficult to convince the public.
On the other hand, doing this job will offend people.
For example, in such a situation, a "Yangtze River" or "Jieqing" laboratory needs to be shut down and rectified due to safety issues.
If the green pepper scholar without a hat is in charge of this matter, in order to prevent being settled by the autumn queen, he will probably not have the courage to fire on the "Yangtze River" and "Jieqing", but will choose to ignore it.
Of course, if this kind of thing is revealed on the Internet, this green pepper will definitely be attacked by various keyboard men.
But knowing is easy and difficult to do. Most people can give pointers to various social events on the Internet. When they are really in a contradictory situation, they will probably make the same choice as the parties involved, which is to "comply with everything."
Looking back to the class, all the 60 new students of the Department of Materials Science were on the spot.
The reason is very simple. This class is to be registered by name. In addition, the counselor Bao Wei and several deputy deans of the materials department are all present. Who dares not come.
As a result, people on the 60s and 70s sat together and watched the PPT, which showed some videos, pictures, and texts of laboratory safety accidents.
Wang Shaoxian dragged a long note: "Today... we mainly... talk about... recent... accidents that happened in domestic laboratories..."
"This is a case that has just been reported not long ago. An explosion occurred in a laboratory of the School of Chemistry, Chemical Engineering and Biological Engineering of Dongfa University in Songjiang University Park. Two students were seriously injured and one student suffered minor abrasions."
Xu Qiu also heard about the accident, but the heat of the incident did not last long. The relevant reports were forwarded in various group chats for about six or seven days, and then disappeared. He vaguely remembered the final investigation result was " Caused by students' operating errors".
The memory of the Internet is limited. As long as it is not an event of the 911 level, most of the other things that seemed "great" at the time, as long as they are not reported continuously, how many people can remember after three years.
Wang Shaoxian’s hypnotic voice continued to sound:
Looking back, at about 10:10 am on December 18, 2015, an explosion and fire accident occurred in a laboratory on the second floor of He Tian Building, Department of Chemistry, Qingbei University. The postdoctoral fellow of the experiment died on the spot. The cause of the accident was that he did not realize that there was a hydrogen leak, and the high temperature experiment caused a hydrogen explosion."
Dead, then this matter is still very serious.
However, Xu Qiu has not heard or seen reports before. Maybe Qingbei University's public relations are better.
In general, laboratory accidents in colleges and universities, minor injuries and severe injuries are more common, and there are relatively few examples of direct casualties. This is because when a laboratory is generally used, the dose of dangerous reagents is relatively small, and there may be chronic toxicity, but Generally, it will not cause much direct harm.
That is to say, hydrogen is special because hydrogen is gaseous. Once it explodes, the flame will spread to the entire space instantly, causing large areas of high temperature and shock waves, and people will be bombarded to death by map artillery before they can escape.

At around 16:30 on June 17, 2015, the laboratory on the second floor of the Physics Building of Sioux City University exploded while processing lithium blocks. Sioux City Fire mobilized 7 fire trucks to participate in the rescue, and no one was injured."
"At around 6 pm on March 6, 2012, a fire broke out in the experimental building of the Peking University Medical Center southeast of the Beisihuan College Bridge. Fortunately, there were no casualties, but smoke filled the entire building. Many people trapped Evacuate the second-floor platform to the outside of the building.
"At around 2 pm on February 15, 2012, a formaldehyde leak occurred on the 6th floor of the Chemistry Building on the Gulou Campus of Jinling University. About 200 teachers and students were evacuated. Three police cars and four fire trucks rushed to the scene. Many students throated in the accident. Pain, tears, and discomfort."
"..."
"On August 8, 2005, the Chemistry Department of Capital Normal University caught fire in a laboratory on the second floor of the laboratory building. There were no casualties."
Although the effect of the old professor's lectures is average, the new students have some understanding of the importance of laboratory safety after reading the PPT.
After all, no one wants to be hung in the safety education PPT as an example in the future.
After Wang Shaoxian finished the PPT, the counselor Bao Wei took his place and said with a light cough: "I will introduce the laboratory safety assessment method, which is conducted in the form of electronic test papers, including true-and-true questions, multiple choice questions and indefinite items. There are 50, 30, and 20 multiple-choice questions, each with 1 point, plus 1 point for correct answers, and two cases for incorrect answers, one gets zero points and the other gets 100 points."
The audience was in an uproar when they heard that some questions were answered incorrectly and 100 points were deducted.
Bao Wei explained:
There are not many questions with 100 points deducted. There are 10 questions in total. They are all of the type that can’t be answered wrong, so don’t worry. The full score of the assessment is 100 points, and 90 points are passed. If you pass, you will not be allowed to do experiments in the research group until you pass the make-up exam."
Xu Qiu nodded slightly, and the department had made a compromise. Instead of forcing the students to take the exam and start the experiment, they assumed that you passed the exam. If you didn't pass the exam by the time, then they will ask you to settle the account.
In this case, it will be much less difficult to implement the policy.
"The assessment time is set after the National Day holiday, and the questions are randomly selected from the question bank. I will send the question bank to you when the course is over. Our freshman class is the first batch to participate in the assessment, and there will be arrangements for the second and third studies. The old students are being assessed.
After a pause, Bao Wei continued:
"In addition, before the National Day, there will be another course with the theme of'Academic Norm Education', and the instructor will also be Professor Wang Shaoxian."
After listening to the course, Xu Qiu and the three returned to Caiyi 216 together.
Xu Qiu saw Duan Yun and Chen Wanqing in front of the desk, and suddenly had an idea: "Tell you good news."
Duan Yun turned his head: "What good news?"
Xu Qiu said mysteriously: "Mo Wenlin, come on."
Mo Wenlin paused, and tentatively asked: "You mean we just heard..."
Xu Qiu nodded, and handed a look of "you can teach you".
The senior sister couldn't help asking: "What the is going on?"
Mo Wenlin complained about Xu Qiu's evil taste in her heart, and then explained in detail with a smile: "It is the safety assessment, specifically..."
Chen Wan innocently gave Xu Qiu a look: "Is this the good news you said?"
Han Jiaying happily interjected: "So, the only person in the group who doesn't have to take an exam is me. I'm still an undergraduate, so great."
"And Wu Shengnan, she doesn't need to be assessed as a postdoc," Duan Yun sighed lightly: "Hey, I thought we graduates don't need to be tested. By the way, have you read the question bank? Do you have many questions?"
"I have received the question bank from the instructor," Sun Wo said: "Three PDF files, there are 1700+ questions in total."
"1700, so many?" Xu Qiu opened the mailbox, downloaded the file, and browsed roughly.
Most of the questions are quite satisfactory, and some common sense is tested.
For example, which of the following substances is prone to explosion when mixed with ethanol? ()
A, hydrochloric acid B, ether C, perchloric acid D, acetone
Xu Qiu second chose C because perchloric acid is a strong acid whose acidity exceeds that of sulfuric acid. It itself is a strong oxidant. If the concentration is relatively high, it will encounter reductive ethanol, which will cause a violent redox reaction. Come out is an explosion.
Some topics are slightly flawed.
For example, what is the wrong statement when taking reagents? ()
A. Do not touch the reagents with your hands, please read www.uukanshu.com to avoid harm to health and contamination of reagents
B. The stopper should be placed upside down on the table to avoid staining. After taking the reagent, immediately cover it tightly, and put the reagent bottle back to its original place with the label facing outward
C. Use a clean medicine spoon to take out the solid reagent, and the used medicine spoon must be washed and dried before reuse
D. The extra reagents can be poured back into the original bottle to avoid waste
Xu Qiu knows that the answer to this question must be D, but in actual experimental operations, the extra reagents can sometimes be poured back into the original bottle.
Just like 1W a gram of polymer materials such as PCE10, as long as the bottle used for weighing is clean when preparing the solution, then the weighing is too much, and the material can be poured back and re-weighed, otherwise as long as 10 mg is wasted Just wasted 100 yuan.
In addition, when depositing gold, if you plan to put two gold targets, one more gold target is poured out. The extra one cannot be discarded directly, and it must be put back into the reagent bottle.
That is to say, for low-value reagents, it is definitely a problem to return to the original bottle; but for high-value reagents, it is still necessary to analyze the specific conditions.
In addition, Xu Qiu also found some very strange problems.
For example, when you enter the laboratory, you find garbage on the ground. What should you do? ()
A. Pretend not to see B. Pick it up and throw it into the trash can. C. Kick into the shadow under the table. D. Give it to the teacher.
Xu Qiu was stunned, and the two options A and C were ignored. After all, they were in line with normal people's thinking.
What kind of insight is the person who asked the question to design the D option.
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