Chapter 198 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."
"Well?"
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."
"Thanks to 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 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, and it is quite troublesome to deal with it. 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, due to uneven grinding, the output will be less, 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 grind roughly 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 about 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 processing 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 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, 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. After asking, 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 just 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 went by, 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 hearing what Qiu Sheng said.
Xu Yun nodded thoughtfully.
When talking about microbial culture, many people often think from a high-level perspective.
But in fact.
The culture medium of microorganisms does not necessarily have to be of particularly high quality. It is divided into specific types, and some substrates are still common things.
Generally speaking.
In the laboratory, there are three types of microbial culture media:
The first is the synthetic culture medium.
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.
The second is semi-synthetic culture medium.
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, the potato dextrose agar medium used for cultivating mold is 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 regular 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 grown using this kind of thing, and this kind of 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. Whenever he had something to do, he would rush over with a large bucket of soy milk.
At that time, Xu Yun and I were single, drinking 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...
This chapter is not finished yet, please click on the next page to continue reading the exciting content! 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 someone adding a mobile phone case without even 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 out, here it is."
Xu Yun took it and looked at it carefully.
A few seconds later.
He suddenly raised his brows and fixed his gaze on one of the columns:
"Good guy, thirty thousand U per milliliter?"
As we all know.
In the field of pharmaceuticals and microorganisms, the smallest potency unit with a certain biological efficacy is called a "unit".
Internationally known as 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 8000U. The difference of 2000 could exceed 10,000.
However, this is a high-density population enriched through special technology and does not have much universal applicability.
Under normal circumstances.
The unit density of this new type of microorganism is only about 1500U.
At present, the amount of U in the culture medium of bean dregs and donkey hair has reached 30,000, which can indeed be regarded as a huge increase.
Xu Yun then 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 from 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/jki.hljxmsy.2021.02.0100 and 10.28502/nki.nkjrb.2014.007254?"
Qiu Sheng nodded:
"That's right."
In 2014.
Led by the China Gene Bank, Academician Yang Huanming once organized a genetic 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 in native donkeys, a Light Point phenotype, referred to as the LP phenotype, will appear.
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.
Besides,
A pentose phosphate pathway product with 225 different metabolites from the high-tender 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 over the years.
There has been no authoritative organization at home or abroad to conduct in-depth research, and many things cannot be accurately concluded.
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:
"First...it's 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 producing toothpaste can be considered."
Speaking of which.
Qiu Sheng couldn't help but look around the laboratory, took a deep breath, and said to Xu Yun:
"To complete this step, our laboratory obviously does not have the capability. 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.
This chapter is not finished yet, please click on the next page to continue reading the exciting content! 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 HKUST and is the treasure of the school.
Facing Qiu Sheng's request, Xu Yun immediately nodded and continued:
"I've noted this down and will 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. Most of the donkeys even in villages and towns are hybrids. After all, the country introduced million-level donkeys."
"So the donkey's fur can be said to be extremely precious, and may even be classified as an 'unique' in the short term."
"So we have to come up with 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 did not need to be alarmed by this matter, Xu Yun could collect all the dregs by himself.
Thus.
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:
"It's not difficult. It's just that 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 inappropriate 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 caught sight of 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 bright face.
According to the deduction results.
She later seemed to discover a lot of microorganisms and became a great biologist as she 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 sludge without being contaminated...
Think of this.
Xu Yun couldn't help but take a deep breath and said to Qiu Sheng: