Men and women eating in the courtyard

Fu Bin also laughed and looked at Zhao Yajun. There was nothing surprising, he was just a kid from the mountains.

At this moment, the team member who picked up the workpiece came back. Li Xuewu stepped forward to take the workpiece, took out another bullet and unscrewed the warhead with both hands, handed one end of the charge to Zhao Yajun and said, "Let Heizi get familiar with these." "

Zhao Yajun placed the workpieces and gunpowder warehouse on the ground and picked them up one by one for Heizi to see and smell.

Fu Bin and Dong Wenxue stood aside and watched silently, while the five team members stretched their necks to look at Zhao Yajun, not knowing what to do.

After getting acquainted for a while, Zhao Yajun nodded to Li Xuewu, and Li Xuewu gestured towards the escort dormitory.

Zhao Yajun took the dog and trotted back to the dormitory.

Li Xuewu asked the five guards to stand at intervals, hid artifacts on three of them, and hid the gunpowder warehouse in the uppers of Dong Wenxu's shoes.

Seeing the teacher dumbfounded, Li Xuewu apologized, stood up and waved to Zhao Yajun, who was standing by the window and looking over.

Zhao Yajun received the order and ran back with the dog. When he arrived in front of a few people, Zhao Yajun pointed at a few people and gestured with the previous actions. Heizi came over wagging his tail.

The few people standing were a little nervous, fearing that the dog would bite them.

Heizi smelled the scent of several people and was about to pounce on the person hiding the workpiece. Zhao Yajun hurriedly stopped him.

Heizi jumped and said "woo" twice to the three of them, spun around in a circle and then stared at Dong Wenxu again, baring his teeth and wanting to pounce on him.

Fu Bin waved his hand and said: "Okay, okay, let's stop here."

This time Heizi only found a workpiece and additional bullets. The result was not ideal, but it was reasonable.

Seeing the effect, Fu Bin interrupted and asked Li Xuewu: "I had a question in the office. Logically speaking, steel and metal have no smell. How did the dog find out?"

Dong Wenxue also looked at Li Xuewu, wanting to see if his student had done his homework.

Li Xuewu also learned some knowledge from later generations of chemistry, and explained it roughly: "Metal itself has no taste. After the skin comes into contact with iron, the iron is oxidized to form a small amount of ferrous ions, and is quickly oxidized into ferric iron. Peroxidized lipids on the skin are reduced to produce volatile carbonyl-containing compounds that produce odor."

Fu Bin's education level was limited, but he was able to grasp the key points and asked: "What is the compound of ferrous ion and carbonyl group?"

Li Xuewu explained sternly: "The carbonyl compound of iron, an ion discovered by foreign scientists in 1887, was discovered in 1890. It was originally a nickel wire burning experiment."

Li Xuewu saw that the two of them were a little confused and stopped explaining this. Instead, he said: "There are many kinds of carbonyl compounds obtained by skin contact with the workpiece. The one that contributes more to the taste is 1-octen-3-one. This molecule has The typical musty metallic smell can be detected at a concentration of only 50 nanograms per cubic meter, and the dog's nose is 20 times more sensitive than the human nose."

Dong Wenxue nodded and looked at the students approvingly, and asked: "Does it produce a smell just by touching metal?"

Li Xuewu nodded and said: "Because this reaction is very fast, as soon as the skin comes into contact with metal and is oxidized by lipid peroxide, it will immediately produce a smell. Therefore, common metal surfaces of iron products containing ferrous ions, rust, and drinking water, Blood, as well as copper products, produce this smell when in contact with the skin, and the evolutionary reason for this ability in dogs may be the need to smell blood."

Fu Bin nodded and said, "Some of our workpieces do not come into contact with people. What if workers steal them while wearing gloves?"

Li Xuewu nodded and replied: "I have considered what the director said. Sometimes, metal that has not been in direct contact with people will also produce a metallic smell. This smell is a bit like the smell of garlic."

Li Xuewu saw that several people listening nodded in affirmation of this smell, so he explained in detail: "Iron and steel products are not actually pure metallic iron. They contain carbon and phosphorus. When iron and steel products are exposed to acid, After corrosion, some small organic phosphorus molecules will be released, especially methylphosphine and dimethylphosphine. People can smell it when the phosphorus content reaches 3-6 nanograms per cubic meter, so this metal with a garlicky smell The smell actually comes from methylphosphine and dimethylphosphine. This garlic smell is also mixed with the smell of calcium carbide, which comes from some unsaturated hydrocarbons and is obtained from the carbon in steel products."

Fu Bin smiled and said to Dong Wenxue: "Section Chief Li came well prepared. Even though I don't understand materials, I can understand it. It seems that the level of education can determine the level of work of cadres."

Dong Wenxue replied with a smile: "He also knows a theory. If you want to talk about practice, you have to do it. The predecessors planted trees and future generations can enjoy the shade. Without the hardships of the predecessors, there would be no chance for him to talk here."

Fu Bin smiled reservedly and said to Dong Wenxue: "You, you can always make me speechless. Okay, let's ask Section Chief Li to submit the materials later. Let's go to Deputy Director Li to get the information." This matter is settled”

Li Xuewu quickly went to the teacher's feet and took out the gunpowder bin. He smiled sarcastically and was glared at by Dong Wenxue.

"Okay Director, let's go back first," they said and turned around and returned to the office building.

Li Xuewu took out his meal ticket and handed it to Zhao Yajun and said: "Go to the dormitory first, and then you will follow them to the cafeteria to eat, and give Heizi a share."

After speaking, he said to the team member just now: "Return the workpiece and don't say anything nonsense."

After waving to Zhao Yajun, he returned to the office building.

After entering the office and starting to write the application report, Li Xuewu lit a cigarette and thought about it for a while, then took out a pen and paper and started writing.

The initial plan is to purchase ten hounds, both male and female, to facilitate later training.

The second point is to establish a regular police dog team and include it in the factory guard team. The location is temporarily set up in the transportation team parking lot. There is still an empty garage there and can be converted into a kennel.

The third is to recruit dog training personnel, those with hunting experience are more suitable.

The fourth is the dog domestication system, establishing daily management and usage regulations. Dog food is hung in the canteen, which can be leftover soup, bones, etc.

The fifth is to take the dog on daily patrols for training.

Li Xuewu wrote everything he could think of on the paper, signed it, and called Wang Jianguo to go to Dong Wenxu's office to deliver the documents.

I started to process the planning documents submitted on Monday.

After finishing the work at the beginning of this week and just signing the documents, Xu Ning knocked on the door and came in with a stack of document bags, followed by Hannya Ting who was holding a folder.

"Section Chief, I pulled out Hu Zhengquan's information, not only his, but also other people in the laboratory building."

"Section Chief, today's inquiry record"

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