Chapter 172: Speechless

Fu Bin also laughed and sized up Zhao Yajun. There was nothing unusual, just a mountain child.

At this moment, the team member who took the pieces returned. Li Xuewu stepped forward to take the workpieces, took out a bullet, twisted off the bullet head with both hands, and handed the end with the gunpowder to Zhao Yajun, "Let Blackie get familiar with these."

Zhao Yajun placed the workpieces and gunpowder warehouse on the ground, picked them up one by one, and let Blackie look and smell them.

Fu Bin and Dong Wenxue stood on the side silently watching, while the five team members stretched their necks to look at Zhao Yajun, not knowing what they were going to do.

After getting familiar for a while, Zhao Yajun nodded to Li Xuewu, and Li Xuewu gestured toward the guard team dormitory.

Zhao Yajun led the dog and ran back to the dormitory.

Li Xuewu asked five guard team members to stand apart, hid workpieces on three of them, and hid the gunpowder warehouse in Dong Wenxue's shoe upper.

Looking at his teacher's crying and laughing appearance, Li Xuewu apologized, stood up, and beckoned to Zhao Yajun, who was standing by the window looking over here.

Zhao Yajun received the order, led the dog, and ran back. When he reached the few, Zhao Yajun pointed to the few, gestured the action just now, and Blackie came over wagging its tail.

The few standing were all a bit nervous, afraid the dog would bite people.

Blackie smelled the smell on the few people, and was about to pounce on one of them who hid the workpiece. Zhao Yajun hurriedly pulled it back.

Blackie jumped up and down, "wu" twice at the three, turned around in place, and then stared at Dong Wenxue, baring its teeth and wanting to pounce.

Fu Bin waved his hand, "Alright, alright, let's stop here."

This time Blackie only found one workpiece and an extra bullet, the result wasn't very ideal, but it was acceptable.

Seeing the effect, Fu Bin interrupted and asked Li Xuewu, "I had a question in the office. According to reason, steel and metal have no smell. How did the dog discover it?"

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

Li Xuewu also explained roughly based on some chemical knowledge he learned in his previous life, "Metal itself has no smell. After the skin touches iron, the iron is oxidized to form a small amount of ferrous ions, and rapidly oxidized to become trivalent iron, while the peroxidized lipids on the skin are reduced to obtain volatile compounds containing carbonyl groups, producing a smell."

Fu Bin's cultural level was limited, but he could grasp the key point and asked, "What are the compounds of ferrous ions and carbonyl groups?"

Li Xuewu explained seriously, "In 1887, foreign scientists discovered a type of iron ion. Compounds of carbonyl groups were discovered in 1890. Initially, it was a nickel wire combustion experiment..."

Seeing that the two were a bit confused, Li Xuewu didn't explain this anymore, but said, "There are many types of carbonyl compounds obtained by skin contact with workpieces. The one that contributes more to the smell is 1-octen-3-one. This molecule has a typical moldy metal smell. It can be discovered by humans when the concentration is only 50 nanograms per cubic meter, and the dog's nose is 20 times more sensitive than the human nose."

Dong Wenxue nodded approvingly and asked, "Does it produce a smell as long as it touches metal?"

Li Xuewu nodded, "Because this reaction speed is very fast, so as soon as the skin touches metal, it is oxidized by peroxidized lipids, and it can immediately produce a smell. Therefore, common metal surfaces containing ferrous ions, rust, drinking water, blood, and copper products will produce this smell after contact with skin. The evolutionary reason for dogs to produce this ability may be the need to smell blood."

Fu Bin nodded, "Some of our workpieces are not touched by people. What if the workers wear gloves to steal?"

Li Xuewu nodded and replied, "I have considered the situation mentioned by the Li Kezhang. Sometimes, metal that has not been directly touched by people will also produce a metal smell. This smell is a bit like the smell of garlic."

Seeing the few people listening nod and confirm this smell, Li Xuewu explained in detail, "Iron and steel products are actually not pure metallic iron, they contain carbon and phosphorus. After iron and steel products are eroded by acid, they will release some organic phosphorus small molecules, especially methylphosphine and dimethylphosphine. When the phosphorus content reaches 3-6 nanograms per cubic meter, humans can smell it, so this metallic smell with a bit of garlic smell actually comes from methylphosphine and dimethylphosphine. This garlic smell is also mixed with some carbide smell, which comes from some unsaturated hydrocarbons, obtained from the carbon in steel products."

Fu Bin smiled and said to Dong Wenxue, "Li Ke came prepared. I, who don't understand materials science, can understand it. It seems that the cultural level can determine the work level of cadres."

Dong Wenxue smiled and replied, "He also just knows a theory. If you want to talk about practice, it still has to be you. The predecessors plant trees and the descendants enjoy the shade. Without the arduous struggle of the predecessors, where would he have the opportunity to talk eloquently here?"

Fu Bin smiled reservedly and said to Dong Wenxue, "You, you can always make me speechless. Alright, let Li Ke report the materials in a while, let's go to Deputy Factory Director Li's place and settle this matter."

Li Xuewu hurriedly went to his teacher's feet to take out the gunpowder warehouse, and was glared at by Dong Wenxue with a bitter smile.

"Okay, Li Kezhang, then let's go back first." As he spoke, the two turned and returned to the office building.

Li Xuewu handed the meal tickets to Zhao Yajun, "Go to the dormitory and wait first. In a while, you follow them to the canteen to eat, and also get a portion for Blackie."

After finishing, he said to the team member just now, "Return the workpieces, don't talk nonsense."

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

After entering the office, he started writing the application report. Li Xuewu lit a cigarette and thought for a while, then took out a fountain pen and manuscript paper and started writing.

The preliminary plan was to buy ten hunting dogs, both male and female, to facilitate later cultivation.

The second point was to establish a conventional police dog team, which would be in the establishment of the factory guard team. The location would temporarily be set in the parking lot of the transport team, where there were still empty garages that could be converted into dog kennels.

The third was to recruit personnel to train dogs, and those with hunter experience were more suitable.

The fourth was the dog's domestication system, establishing daily management and usage specifications. Dog food would be hung in the canteen, which could be leftover vegetable soup, bones, etc.

The fifth was to take dogs for patrol during daily patrols, using training as practice.

Li Xuewu wrote everything he could think of on the paper, signed it, and called Wang Jianguo to send the document to Dong Wenxue's office.

He himself started to handle the planned documents reported on Monday.

After handling the work at the beginning of this week and just signing the documents, Xu Ning knocked on the door with a stack of document bags, followed by Han Yating holding a folder.

"Li Kezhang, I have transferred Hu Zhengquan's information, not just his, but also others in the experimental building."

"Li Kezhang, today's inquiry record."