Chapter 504: A masterpiece that has come to light again after 456 years (Part 2)
In the laboratory.
Following Jin Qianqian's order.
Another operating room.
An operator quickly pressed a red button.
After a while.
On the display screen in front of the operator, a long bar representing a certain value began to gradually rise:
1%....
7%....
26%....
49%.....
61%......
The name of the gas to which this value corresponds is...
n?.
Students who haven’t been pissed off by their chemistry teacher should know this.
n?, refers to nitrogen.
Nitrogen is a colorless and odorless inert gas at normal temperature and pressure, and is also a well-known protective gas.
For example, in the fields of metallurgy and aerospace, nitrogen is often used as a safety gas or cleaning gas.
There are also high-power incandescent lamps, which are also filled with nitrogen:
It can prevent the tungsten filament from being oxidized, thus extending the life of the bulb.
The purpose of Jin Xiangqian's order to inject nitrogen into the laboratory is naturally to drain the oxygen in the room and prevent the cultural relics inside the Copper Palace from oxidizing.
Of course.
Seeing this, some students may have a question:
Why not use argon?
After all, helium is a non-renewable resource, and argon is not expensive.
The answer is simple.
Because there is an inner shell of golden nanmu inside the copper palace.
Golden nanmu is different from other woods in that its epidermal molecules have a three-dimensional network structure - which is the core reason for its durability and corrosion resistance.
Although argon gas can also have a protective effect, argon gas as a carrier gas will destroy this three-dimensional structure - this involves the problem of self-priming under pressure difference scenarios.
To a certain extent, this is the same as filling windows with argon gas to increase the thermal insulation performance.
It's just one good and one bad.
Therefore, from the perspective of protection, Jin Xiangqian and the others still used nitrogen this time.
More than twenty minutes later.
The operator's report came from Jin Xiangqian's earphone:
"Report, the room is full of nitrogen!"
Jin Qianqian nodded when he heard the words, walked to another area, and said to a communicator fixed on the wall:
"Old man, you can start removing the rust."
Weng Tong in the room gave him a thumbs up again and picked up a spray gun from the shelf nearby.
I saw him tinkering with the position and barrel of the spray gun a few times, and then pressed the start button.
It didn't take a few seconds.
A stream of milky white spray was sprayed from the spray gun.
The moment he saw this spray, Xu Yun couldn't help but let out a sigh.
This ointment is said to be foam but not that fluffy, and it is said to be latex but not that sticky.
Seems a bit similar...
toothpaste?
Just as this strange thought popped up in Xu Yun's mind, Jin Xiangqian's introduction rang in his ears again:
"Dear audience friends, as you can see, we are now in the process of removing rust from the surface of the copper palace."
"The main purpose of this step is to remove the dirt and patina on the surface of the copper palace...that is, basic copper carbonate."
"The way to clean patina in a household environment mainly relies on acidic substances, but this time in order to improve efficiency and protect the copper temple, we used a microbial paste containing 'Easy bacteria' for cleaning."
"This kind of microbial paste is also available on the market. It is called 'Qingzhao' toothpaste, and it is a product of Huadun Biotech."
"??????"
When Jin Xiangqian said the first half of his sentence, Xu Yun really didn't feel anything at all, thinking that he was just making a normal introduction.
But when he heard the first and last half of what Jin said, a series of question marks suddenly appeared in his mind, and the whole thing fell into a downtime state.
What's the situation?
On such an important occasion, Jin Xiangqian is actually helping Huadun Biotech to advertise?
impossible?
To know.
Before today, Xu Yun and Jin Xiangqian had never met once.
Could it be that the University of Science and Technology or the Academy of Sciences were behind this?
This is obviously not right - Jin Xiangqian is not a standard member of a scientific academy, and the archaeological circle basically belongs to another independent small group.
Moreover, even if he had connections with the academy, he would not be advertising Huadun Biotech at this time.
After all, the scope of radiation from this incident was too wide, far beyond the scope of science and academies.
Suddenly.
Xu Yun thought of something and suddenly turned his head and looked at Academician Pan aside.
It's a coincidence.
Academician Pan seemed to have predicted Xu Yun's movements and was staring at him at this time.
After the two people's eyes met.
Academician Pan raised his eyebrows at him. He first pointed his finger at Jiang Chenggu beside him, and then pointed upwards at the ceiling.
When Xu Yun saw this, he was immediately stunned.
But soon.
The shock on Xu Yun's face was replaced by a look of enlightenment.
Jiang Chenggu comes from the central department of the country, the General Office of China, and represents more than just his personal will.
Plus Academician Pan’s gesture of pointing at the ceiling...
Within seconds.
Xu Yun then understood what Academician Pan was implying:
The arrangement for Huadun Biotechnology to debut today was not the idea of HKUST, the Academy of Sciences or Jin Xiangqiang.
But from...
Instructions from above.
As for the reason...
no doubt.
This is to reward Xu Yun:
After Xu Yunshe's death press conference, Hou Xingyuan once asked for three compensations from Xu Yun. At that time, the two parties were considered to be "liangqing".
However, Xu Yun made great contributions to the Academy of Sciences' dark matter press conference and the development of the gravity gradiometer that followed.
Although these two incidents involved national sentiments, Xu Yun himself had no intention of using them as threats in exchange for rewards.
But it's one thing if Xu Yun doesn't do it himself, it's another thing if his superiors don't express it.
So it's obvious.
This time Jin Xiangqian's "advertising insertion" is the reward set by the superiors...or one of the rewards.
The current high level of live broadcast attention, coupled with the national endorsement represented by Jin Xiangxiang...
Xu Yun estimated that after the live broadcast, Qingzhao brand toothpaste would be sold out.
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Xu Yun suddenly felt sad in his heart - not for himself, but for Brother Donkey.
After all, the materials for cultivating Yi'an bacteria all come from Brother Donkey...
........
Although Yi'anji toothpaste is not an acidic substance, its cleaning performance is very strong - after all, its native environment is the sewer of the University of Science and Technology.
There are acids and alkalis in the sewer, and Yi'an bacteria can firmly occupy a place in it. It can be seen that it has a strong cleaning ability for both acids and alkali.
Coupled with the abrasive effect of toothpaste itself, the patina on the copper temple was quickly cleaned.
Twenty minutes later.
The Bronze Hall, which was originally full of soil and patina, has taken on a new look, becoming as magnificent and magnificent as before.
Under the illumination of laboratory light.
The whole body reveals a soft metallic beauty.
It can also be seen through the magnified lens.
The appearance of the Bronze Palace is not smooth and clean, but is engraved with many dragon patterns and some tree textures.
See this situation.
Another old expert from the Ming Dynasty who did not follow Weng into the laboratory came forward and looked carefully for a while, touched his chin and said:
"The sideburns are like a canopy, the lower jaw is longer, and the hair has a diagonal upward thrust. This is the standard rising dragon pattern of the Ming Dynasty, and it was also Jiajing's favorite dragon pattern during his lifetime."
"The texture of the trees is the branch-twisting pattern, which is the branch-twisting pattern after the Yuan Dynasty. It mainly uses plant branches or vines as the skeleton, extending up and down, left and right."
"You can often see this texture on the blue and white ceramic plates or bowls used in many people's homes now."
Then the old expert pointed at the screen again and continued:
"During the Ming Dynasty, there were only two emperors who liked both textures and used them for a long time. One was Wanli and the other was Jiajing."
"Wanli is a descendant of Jiajing. Jiajing had already buried his bones for many years when Wanli died. It is impossible to bury the Tongdian under Jiajing's back hall, so the owner of the Tongdian must be Jiajing."
"In addition, there are no sun and moon flags from the Ming Dynasty on the Bronze Palace. This means that the Bronze Palace is not a royal-standard object, but a Jiajing..."
"Personal belongings."
As soon as the old expert finished speaking.
There was a faint sound of gasping at the scene.
Personal belongings.
Although these four words do not mention the "Yongle Dadian", their meaning is almost explicit - after all, according to the previous "X-ray" scan, the interior of the Bronze Hall is filled with books.
after awhile.
Weng Tong's voice sounded again in the communicator.
Due to the obstruction of the oxygen mask, his voice sounded hazy:
"Director Jiang, Lao Jin, there is a horizontal lock on the front of the Tongdian. Should we use tools to cut it open or..."
Weng Tong didn't finish his words.
Jiang Chenggu and Jin Xiangqian interrupted at the same time:
"Don't cut it!"
"Can't cut!"
Then Jiang Chenggu made a 'you tell me' gesture towards Jin Qianqian. Jin Qianqian nodded to him and said:
"Old man, the historical value of the Copper Palace is very high. If we can avoid destroying it, we'd better not destroy it."
"In this case, you follow my command - do you see the thing on your right that looks like the Tiga Divine Light Rod? Yes, that's it."
"This is a frequency spectrum modeling instrument. You move it head-up to the lock of the copper lock, then press the purple button and wait until the word "ok" appears on the display screen."
"Our backend will polish the key based on the frequency spectrum, and the key will be delivered to you after it has been disinfected. Do you understand?"
Weng Tong gave another thumbs up indoors and said solemnly:
"I understand, Lao Jin, when did you get this thing? Can you give me one later?"
Jin Xiangqian:
"...."
The comments in the live broadcast room also flashed [ ] and [ cute pinch ] for a while.
Then Jin Xiangqian seemed to have not heard the second half of Weng Tong's words, and turned to introduce to the crowd and the camera:
"Ahem... As you can see, the frequency spectrum modeling instrument in Professor Weng's hand is indeed a relatively advanced equipment. It is one of the scientific and technological archaeological instruments developed by Changguang Institute."
"After all, various types of locks in archeology are not as easy to open as in reality. Some ancient locks are very old, and some have signs of embroidery inside because of time."
"The frequency spectrum modeling instrument can determine the structure, rust spots and even the main components of the rust based on the feedback of the spectrum."
"From this, a suitable key can be created to achieve the effect of accurately opening the cultural relic lock."
After everyone heard this, they all nodded.
have to say.
Before today, many of them had a rigid understanding of the archeology profession.
In their view.
The so-called archeology is basically the kind of digging with a shovel and sweeping the soil with a small brush. At most, it is done with remote sensing mapping.
The result was unexpected.
Today’s archaeological technology level has actually improved to such an advanced level?
Fifteen minutes later.
A forged key passed through the transport platform and was steadily delivered to Weng Tong.
The key is about fifteen centimeters in length, about three centimeters in width, thick at the end, narrow in the middle, and slightly wider at the front.
While it feels hard in the hand, there is also a slight warmth that comes from being just forged.
Then with the help of Tong Huaijun.
Weng Tong inserted the key into the keyhole and twisted it left and right a few times.
After a while.
Just listen to a clicking sound.
The lock popped open with a sound.
See this situation.
Everyone's breathing couldn't help but become heavier again.
Taking the floor-to-ceiling window where Xu Yun and others were sitting as the front, the side where the copper lock was located happened to be facing the glass window.
It can be seen through the floor-to-ceiling windows.
The door closed by the copper lock opens and closes left and right, somewhat similar to a real wardrobe or a double-door refrigerator.
Weng Tong then took off the copper lock and worked with everyone to open the copper hall to both sides.
A few seconds passed.
After seeing clearly the scenes on each floor of the Bronze Palace.
In the live broadcast rooms of major platforms, a row of question marks once again flashed across:
【?????】
Because what was displayed in front of them at this time was not those metal boxes, but another closed wooden inner layer.
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Weng Tong, who was in the room, touched the texture of the inner wood layer and said with an uncertain tone:
"Oh my God...this wooden inner layer is...golden nanmu?"
Tong Huaijun on the side also stepped forward and observed carefully for a while, nodded and said:
"That's right, and it's golden nanmu with dragon scale patterns."
"No, it's actually golden nanmu with dragon scale pattern?"
Looking at these two archaeological experts who seemed to be seeing golden nanmu for the first time, Xu Yun couldn't help but twitch the corners of his mouth.
Install, continue to install.
It would be a pity not to act with this kind of acting skills.
In order to cover up the traces of the gravity gradiometer, the authorities took great pains this time.
Everyone, including Weng Tong and the others, had to pretend that they had not discovered the presence of golden nanmu inside until then...
Of course.
Compared with the previous opening of the copper lock of the Tongdian, the inner layer of golden nanmu is much simpler:
The 7x7x3 golden nanmu cannot be made by hollowing out the original golden nanmu. After all, the thickest golden nanmu in the world is only 3.6 meters, and the tree is 4,300 years old.
The bottom specification of 7x7 determines that it can only be made through cutting and combination.
The main reason why the committee previously rejected the drilling plan was that it was worried that air would enter the interior of the copper palace along the drilling holes, causing oxidation of the remaining nanmu partitions.
Then with the cooperation of the staff.
Weng Tong and others quickly discovered the bonding interface of the golden nanmu layer on the side.
They then used precision laser cutting equipment to cut four small slits into the joints of the golden nanmu without damaging the overall structure.
Then position the suction lifter at the four corners, turn on the power and pull it gently.
The entire golden nanmu partition was easily removed.
The unloaded golden nanmu was quickly placed in a flat closed box with a shock-absorbing device at the bottom and a larger area than the golden nanmu.
at the same time.
Whether inside or outside the live broadcast room.
Everyone's eyes were fixed on what was revealed as the golden nanmu partition was removed...
On the cast iron box.
There are about twenty boxes in total, and their dimensions are exactly the same as those measured by the previous gravity gradiometer.
That is the specification of 1.5x2x1.
The moment I saw the box.
Xu Yun clearly heard the sound of gasping coming from Jiang Chenggu next to him - it was obvious that the future elder was also unsettled.
At this moment.
They are just a few steps away from the reveal of the answer to the riddle...
One box apart.
after awhile.
Jin Xiangqian was the first to come to his senses. He took a deep breath and said to Weng Tong:
"Old man, old man, can you hear me? It's better to follow my instructions now."
"First, let Xiao Lin and Xiao Wang choose a box and carry it to the open space. You and the old man are going to use anhydrous liquid phase deacidification!"
"In addition, we will now cool down the indoor temperature. After cooling, the room temperature will only be about 10 degrees. Please bear with it."
"At the same time, the light intensity and illumination angle will also be adjusted. Are you ready?"
"..."
Weng Tong was silent on the other end of the communicator for a while, and then slowly but firmly gave a reply:
"Ready."
What Jin Xiangqian was waiting for was his words. Hearing this, he immediately waved his hand and ordered:
"Then let's start! All departments take action!"
Swish——
Jin Xiangqian finished speaking.
The operators who had been waiting in the operation room immediately took action.
Weng Tong and Tong Huaijun also quickly began to prepare for the anhydrous liquid phase deacidification process.
This step is the most important step in the protection of cultural relics.
As we all know.
China has a long history and civilization, an important example of which is the large number of ancient books, archives and other documents.
These documents record the wisdom accumulated by the ancestors in long-term practice and the changes in world affairs, and are witnesses of the development of society and science and technology.
However, as the main material of these precious documents, the life of paper is limited after all.
After countless years of erosion and natural or man-made damage, it is inevitable that the end will come.
Among the factors that affect the life of paper.
The main reason that affects the durability of paper and promotes the aging of paper is...
acidification.
Students who have taken advanced chemistry should know this.
The main component of paper is cellulose, which is a chain polymer formed by a large number of glucose units connected through β-glycoside bonds.
The degree of polymerization of cellulose can reach the order of 10^4 in its natural state, but drops to the order of 10^3 after being made into pulp.
When the degree of polymerization drops to about 700, the mechanical properties of the paper will decrease significantly.
When the temperature drops below 200, the paper will become brittle and crack.
Under general conditions, cellulose is relatively stable and does not react easily.
However, under acidic conditions, the β-glycoside bond is easily broken and cellulose hydrolysis occurs.
During the hydrolysis reaction, the acid is not consumed but accumulates more and more, causing more and more harm.
And it is often accompanied by oxidation reactions, further aggravating the aging of paper.
From the emergence of archeology to the present, countless paper documents at home and abroad have been passively destroyed due to acidification.
With the development of science and technology, various deacidification technologies have finally emerged.
There are two main types of existing deacidification processes:
Liquid phase deacidification and gas phase deacidification.
Their principles are very simple. To put it bluntly, they use an alkaline deacidifying agent to neutralize the acid in the paper to achieve the purpose of deacidification.
Among them, the gas phase deacidification method is mainly divided into diethyl zinc method and morpholine deacidification method. However, due to their high process requirements, there have been few examples of using this method in China in recent years.
Liquid phase deacidification is divided into aqueous solution deacidification method and organic solution deacidification method.
Among them, the former is more common in the three countries of Neon, Germany and Italy, so it is also called the Axis deacidification method.
Basically, the organic solution deacidification method currently used in China is very experienced in this regard.
So this time, Weng Tong and others also used the organic solution deacidification method - even if the box does not contain "Yongle Dadian", this step is still indispensable.
As for the cooling and light issues mentioned by Jin Xiangqian, they are also important aspects in the protection of cultural relics.
Take textiles for example.
Organic dyes, titanium white, zinc white and other substances on textiles can act as photosensitizers, absorb light energy, and transfer the energy to the textile itself, which will extend the wavelength range of organic material degradation to the visible light region.
As for energy, it will promote rapid chemical reactions between organic molecules and oxygen.
This results in the detachment of groups or reduction in the degree of polymerization, a decrease in molecular weight, and ultimately the destruction of the cellulose structure.
The same goes for the cellulose in books.
So according to normal circumstances.
The current unpacking process should be carried out under light-proof conditions.
However, due to the live broadcast...or to prevent neon people and sticks from fishing in troubled waters, I was forced to change it to the light state.
Therefore, how to penetrate the light and how much light intensity is required require careful planning.
Fortunately, Jiang Chenggu and the others had three weeks to prepare, so this step was not rushed at the moment.
"Report! The ultraviolet frequency has been filtered out successfully!"
"Report! The infrared frequency has been blocked!"
"The illumination has been adjusted to 76lux...."
"Lighting equipment numbers a1, a4, t5, c7...., the incident angles are 14.36°, 44.67°, 34.58°..."
Fifteen minutes later.
everything's ready.
Weng Tong held the key that was made again by the frequency spectrum modeling instrument in his hand, and gently poked it into the keyhole of the iron cast box.
Click——
The keyhole, which was much more delicate than the copper lock of the Tongdian Palace, made a crisp sound and opened with a click.
Weng Tong took a deep breath and took off the lock.
Then he and Tong Huaijun looked at each other.
The two partners, who have known each other for more than thirty years, did not need to communicate. They had a tacit understanding and stood at the corner of the box, working together to lift the box open.
Although the whole process from closing the box to opening it only takes less than two seconds.
But to Weng Tong's senses, these two seconds seemed like two years had passed.
But soon.
Weng Tong's complicated inner drama was disrupted by Tong Huaijun's exclamation:
"Old man, look!
"
"...Volume 1,320...Volume 1,267...Volume 1,306...
"The box contains all—"
""Yongle Dadian"!
"
.......
Note:
I will open the copy tomorrow and code all night tonight
