Chapter 199 The world with only the injured donkey is completed (5.8K)
Half an hour later.
Xu Yun rushed to the medical building with a hurried expression, took the elevator to the laboratory.
As soon as I walked in the door.
He then saw Qiu Sheng with his headphones plugged in, leaning on the chair, crossing his legs and swaying.
I was sipping soy milk while scrolling through Douyin, looking so happy.
Xu Yun walked quickly to him, curled his index finger, and tapped twice on the table:
"Hey, Lao Qiu."
"Huh?"
Qiu Sheng finally came to his senses and took off his headphones.
Then he stretched, took a cup of packaged soy milk from his side and pushed it in front of Xu Yun:
"Here, the soy milk in Dongyuan Canteen is still hot."
"It comes from the hard work of that donkey brother. You don't know how popular this thing is these days. You can't get it even a minute after eight o'clock."
Xu Yun took the soy milk, took a sip, and then said:
"Let's not talk about the soy milk. Speaking of Lao Qiu, what is the situation with the culture medium you mentioned before?"
Qiu Sheng smiled when he heard this, moved his chin in the direction of the culture medium, and explained:
“Isn’t the business of stone-ground soy milk in the canteen very good these days? By the way, there is also quite a lot of bean dregs ground out every day.”
"It is said that there are hundreds of kilograms of bean dregs left every day, which is quite troublesome to deal with. You should know this, right?"
Xu Yun nodded slightly.
Classmates who were beans in their previous lives should know this.
Generally speaking.
If your face is not dark, one pound of beans can produce about five to six pounds of soy milk.
If you use a donkey-pulled stone mill, the output will be less due to uneven grinding, probably only about 4 kilograms.
Soy milk is denser than water, so 500 grams of soy milk is just over 400 ml.
400x4=1600
In other words, one pound of beans can be used to grind 1.6 liters of soy milk through a stone mill.
The size of a cup of soy milk in Dongyuan Canteen is generally 200 ml, which is 200 liters for 1,000 people, which is 130 kilograms.
Recently, the stone-ground soy milk in the Dongyuan Canteen has become very popular, and many students from the Central and Western Districts have also come to buy breakfast. The total number of visitors is about 3,000.
Counting some other soy products, the weight of bean dregs produced in the canteen every day has been fluctuating between 130 and 160.
It is quite troublesome to deal with these bean dregs. After all, bean dregs products are not that easy to sell.
In most cases, the remaining bean dregs can only be sent for fermentation to produce liquid fertilizer.
Then Qiu Sheng paused and continued:
"That day I met several work-students who were dealing with bean dregs at the Southeast Gate, and one of them happened to be a school girl from my hometown."
"So I begged her for a pound of bean dregs, and I planned to make a bean dregs cake or something to satisfy my craving when I have time."
Xu Yun nodded and asked again:
"What about the donkey hair?"
Qiu Sheng picked up the soy milk and took a sip, and then dragged a small blue bag from the side. Some animal hair could be vaguely seen:
"She was holding a small plastic bag in her hand at the time. When she asked, she found out that these were the hairs shed by the donkey during the change of seasons, and she planned to find a garbage dump to throw them away."
"I happen to be leading a group of topics recently, which is about the characteristics of research-type keratin fiber materials in terms of water-responsive shape memory and mechanism."
"Donkey hair is a natural textile fiber material. To be honest, it is a little rarer than wool and bird feathers, so I brought the bean dregs and donkey hair back together."
"Later, when I was making the culture medium, I was thinking about someone who said, it doesn't cost any money, just give it a try, so I used the bean dregs as the base."
"I brought the bean dregs and donkey hair back together. Although they were separated by bags, one of them was still caught in the bean dregs."
"This is just a control group I made on a whim. I wasn't so careful during the inspection and I didn't pay attention to it being mixed in."
"As time passed, it was suddenly discovered that the number of new microorganisms around donkey hair actually increased to more than twenty times that of the other control groups!"
"No, I'll call you right away."
After listening to Qiu Sheng's words.
Xu Yun nodded thoughtfully.
When it comes to microbial culture, many people often think from a high-level perspective.
But actually.
The culture medium of microorganisms does not necessarily have to be of particularly high quality. It is divided into specific types. Some substrates are still common things.
Generally speaking.
In the laboratory, there are three types of microbial culture media:
The first is synthetic media.
The various components of this culture medium are various known chemical substances. The advantage is that the chemical composition is clear, the composition is precise, and the repeatability is strong.
The disadvantages are that it is more expensive and microorganisms grow slowly in this type of culture medium.
For example, Gao's No. 1 synthetic medium, Cha's medium, etc.
Followed by semi-synthetic media.
It is a medium made by appropriately adding inorganic salts of known ingredients on the basis of natural organic matter, or adding certain natural ingredients on the basis of a synthetic medium.
For example, potato dextrose agar medium used for cultivating mold is of this type.
The last one, which is also the most frequently used, is the natural culture medium.
It is made entirely from natural substances, such as steamed potatoes and ordinary beef broth:
The former is used to cultivate mold and make Ubisoft servers, and the latter is used to cultivate bacteria.
At the same time, in addition to potato and beef soup, the bean dregs used by Qiu Sheng are actually a common old trick.
For example, the mycelium of Pleurotus eryngii is cultivated with this stuff, and this substrate is also used for the reduction of Obiobacterium pallidum.
Just in reality.
The reason why most hard-working biochemical lovers like to use bean dregs is mainly because they can use their funds to buy beans to make soy milk and drink it. It is safe and can save some money at the same time
When Xu Yun was studying for his Ph.D., he knew a biology professor. The laboratory was next to the physics laboratory where Xu Yun worked as a coolie. He would come to the door with a large bucket of soy milk whenever he had something to do.
At that time, Xu Yun and I, two singles, drank soy milk and edamame, chatting about all kinds of things, which is quite interesting now that I think about it.
Later, all the children of that buddy were admitted to the University of Science and Technology this year, and Xu Yun was still single
What a sad story.
In addition to bean dregs, it is also normal to add donkey hair by mistake as Qiu Sheng said.
Ordinary petri dishes can be said to be the place where strange things are most likely to appear in the laboratory.
For example, nail shells, hair, and some unidentified and curved hairs can all be seen.
At a dinner party after Xu Yun graduated, I even heard that someone added a mobile phone case without knowing it.
Then he was silent for a moment, looked at Qiu Sheng, and asked:
"Lao Qiu, where is the test report? Show it to me."
Qiu Sheng was obviously prepared for this problem. He took a few pieces of paper from his side and handed them to Xu Yun:
"I've printed it, here it is."
Xu Yun took it and looked at it seriously.
After a few seconds.
He suddenly raised his eyebrows and locked his eyes on one of the columns:
"Good guy, thirty thousand U per milliliter?"
As everyone knows.
In the field of pharmaceuticals and microorganisms, the smallest potency unit with a certain biological efficacy is called a "unit".
Internationally called IU.
China is called U.
There is no conversion between IU and U. There is only the conversion between IU and weight or the conversion between U and weight.
In other words, the dose level U/L is a unit unique to China.
Generally speaking.
In China, most vitamins are expressed in IU?
Antibiotics are represented by U.
For example, the specifications of penicillin are generally 200,000 U per milliliter, and erythromycin is 70,000 U per milliliter.
Previously, the largest new species unit found by Xu Yun and others in moss was 8,000U, which was 2,000 units shy of over 10,000 units.
However, this is a high-density population enriched through special technology and does not have much universal applicability.
Normally.
The unit density of this new type of microorganism is only about 1500U.
At present, the amount in the bean dregs + donkey hair culture medium has reached 30,000 U, which can indeed be regarded as a huge increase.
Then Xu Yun put the report aside and asked Qiu Sheng:
"So Lao Qiu, what's the reason for the sudden increase in new species?"
"It makes sense that the bean dregs base can increase the population dramatically. After all, there may be some specificity in the physical and chemical indicators, which is not difficult to accept."
"But what about donkey hair, and why does it have to be the hair of local donkeys?"
Hearing this, Qiu Sheng raised his eyelids and glanced at him, then asked with a smile:
"Old Xu, do you still remember the original round of research on donkey gene expressions led by the National Gene Bank?"
Xu Yun was stunned for a moment, then blurted out:
"Are those two reports 10.13881/j.cnki.hljxmsy.2021.02.0100 and 10.28502/n.cnki.nkjrb.2014.007254?"
Qiu Sheng nodded:
"That's right."
In 2014.
Led by the China Gene Bank, Academician Yang Huanming once organized a gene sequencing of donkeys.
It was also the world's first large-scale donkey genome project.
During the subsequent inspection process, the inspection team discovered many very strange situations.
For example.
Native donkeys produce small amounts of calcium thioglycolate in their bodies.
That's right.
Calcium Thioglycolate.
This thing is a bit confusing to read, but in reality it is used for hair removal, can you believe it
Other than that.
They also found that a LightPoint phenotype, referred to as the LP phenotype, will appear in native donkeys.
under this phenotype.
Mutants of the MC1R gene not only affect hair, but also affect the amplification of the CDS sequence of the PepT1 gene.
This directly leads to a very strange ratio in the Young's modulus of elasticity of donkey hair.
For example, when the relative humidity increases from 0 to 100%, the axial swelling of donkey hair is only 1%.
The ratio of Young's modulus to shear modulus decreased from 217:1 to 15:1.
Otherwise,
A pentose phosphate pathway product with 225 different metabolites from the high-tenderness group was also detected in the hair of local donkeys. The results of this study were also published in the Nature sub-journal.
Unfortunately, the number of native donkeys today is too small.
So down the years.
There has been no authoritative organization at home and abroad to conduct in-depth exploration, and many things have not been able to reach accurate conclusions.
In fact, there are many similar situations, such as native black pigs, toads, etc., all of which have many unknown phenotypes.
Think of this.
Xu Yun couldn't help but look at Qiu Sheng and asked:
"Lao Qiu, you mean that the pentose phosphate product and the bean dregs formed a special culture environment, thus guiding the expansion of new microorganisms?"
Qiu Sheng nodded and affirmed:
"Yes, but this is just a superficial feedback. The specific internal situation requires further study."
"So I think we have three things to do first."
Xu Yun glanced at him and asked:
"What three things?"
Qiu Sheng immediately held up his fingers, looked at the box containing the culture medium and said:
"The first thing is the analysis of the expansion of new species."
"The current density of 30,000 U has reached the upper limit of natural growth, and there is not much room for growth. However, this number is still far from the ideal value we need."
"So we need to analyze the components of the pentose phosphate product as soon as possible and master its amplification technology."
"Then further amplification and inactivation can be carried out, and finally the problem of toothpaste production can be considered."
Speaking of which.
Qiu Sheng couldn't help but look around the laboratory, took a deep breath, and said to Xu Yunde:
"To complete this step, our laboratory obviously does not have that capability, so we must apply for small molecule probes from the school."
Small molecule probes.
This is a relatively new technology in recent years.
It started to rise around 2010 and quickly triggered a trend.
Now more than ten years later, it still has not touched the technical ceiling, and the differences in the field are huge.
For example, ordinary small molecule probe technology can be used in ordinary hospitals, and it costs 200 yuan and can be used on medical insurance cards.
The most sophisticated small molecule probes that can form DNA microarrays are ridiculously expensive, with a complete set costing no less than 10 million.
The small molecule probe Qiu Sheng mentioned is almost KIT-level equipment, and the single cost is about 20,000 to 30,000 yuan.
This kind of equipment must be approved by Tian Liangwei before it can be used, which obviously does not exist in this laboratory.
In a sense.
It makes sense that it belongs to the University of Science and Technology as the treasure of the school.
Facing Qiu Sheng's request, Xu Yun nodded immediately and continued:
"I've written this down. I'll contact the teacher. What about the second thing?"
Qiu Sheng's expression suddenly relaxed, he sat back in his seat and said to him:
"The second thing is the problem of the donkey."
"It's not easy to find local donkeys these days. Even in villages and towns, most of them are hybrids. After all, the country imported millions of Pakistani donkeys."
"So the donkey's fur can be said to be extremely precious, and it can even be classified as an 'unique' in the short term."
"So we have to think of a plan so that it can produce some hair regularly."
"On the contrary, it is easier to find the bean dregs. The materials that should be scrapped can be obtained by just asking them."
Xu Yun also nodded in agreement.
The appearance of Brother Donkey has brought a lot of profits to Dongyuan Restaurant. In addition, the bean dregs are waste that is used as fertilizer and have almost no value.
Therefore, even Tian Liangwei didn't need to be alarmed by this matter. Xu Yun could collect all the dregs by himself.
This way.
From production to waste recycling, the entire process is seamless from beginning to end.
Not a single bit wasted, it was perfect.
Only Brother Donkey’s injured world is complete.JPG.
Then Xu Yun paused and asked again:
"What about one last thing?"
"The last thing"
Qiu Sheng scratched his head, stretched on his seat, and said:
"This is not difficult, but the name of this new microorganism is a bit hard to pronounce. Can you give it a name?"
"Name it?"
Xu Yun was stunned for a moment and fell into deep thought.
indeed.
This is a very valuable microorganism. It is not appropriate to always call it a new species. It would be much more convenient to give it a name.
But what should I call it
Between contemplation.
Xu Yun's eyes suddenly glanced at an optical microscope not far away. The mirror of the microscope was reflecting light like a bald head.
After a while.
A short little girl suddenly appeared in his mind, waving towards him with a flying face.
According to the deduction results.
She later seemed to discover a lot of microorganisms and became a great biologist as expected
I wonder if the microorganism I discovered has something to do with her?
At the same time, this kind of microorganism is cleaning the world all the time, even in the most filthy sewers, it is still sludge-free.
Think of this.
Xu Yun couldn't help but take a deep breath and said to Qiu Sheng:
"The name."
"Just call it Yi'an Bacteria." (End of Chapter)