National Beer

Luo Yuhui smiled and said, "I won't come. There are a lot of things in the factory, all waiting for me. I can't stay in the laboratory if I stand on the last post."

Fang Lingxian smiled. He understood Luo Yuhui's meaning. What Qin Dong is doing now is the most basic work in some laboratories. The most basic meaning is that there is no visit value.

Luo Yuhui did not go to the workshop, but went home directly.

The next day, he rang the director's office, "Qin Dong has been in the laboratory last night, and Zhou Yi is also in the laboratory. The girl, Xiao Zhou, is still very principled..."

He said vaguely and implicitly, and the factory manager could understand that Qin Dong did not have the idea of ​​getting Qin Beer’s yeast. In fact, if Rong Beer wants to get yeast, Zhou Yi, as Zhou Fenghe’s daughter, is better than Qin Dong. Also convenient.

"Well, I know that Zhou Fenghe is a human being. Chen Shifa is also very angry. He is not the kind of person who flies to the dog." Since people don't care about Qin Beer's yeast, the factory manager relieved his mind and turned to care about the turtle In the battle with the turtle, "Lao Luo, who can win in the end?"

Qin Beer Factory No. 1 and Factory No. 2 are so big that they cannot always be without a deputy chief engineer.In fact, there are a lot of people staring at this position, but the director still wants to bring in talents from outside.

"I haven't touched Dong Qingkun, but Qin Dong..." Luo Yuhui shook his head.

"Why, if you have something to say, you are an old comrade, don't hide and tuck with me." The director said impatiently.

"Well," Luo Yuhui said cautiously, "Qin Dong, I have heard that he may know beer equipment, but at most he is at the level of technical secondary school students. Our technicians can do all of his things. They are all conventional things. , He is still comparing which yeast strain has the least diacetyl content..."

"Yeah," the director did not have a technical background, and he didn't understand the things in the laboratory, but he understood Luo Yuhui's words, "didn't he invent enzymatic saccharification technology?" he asked rhetorically.

Luo Yuhui thought a little bit, "Lao Qin is the first chief engineer of our factory. Actually, I shouldn't say anything. Perhaps, it may be the information left by Mr. Qin... For example, there happens to be an enzymatic saccharification method... …"

The director nodded. He already understood that Luo Yuhui meant that Qin Dong read his grandfather's previous information, but to remove the smell of horse urine, this issue may not be included in the information, or Qin did not solve it, then Qin Dong has nothing to do. .

"I understand, well, let Fang Lingxian accompany you from now on." The director picked up the phone and signaled Luo Yuhui to leave.

...

Time flies so fast. In a blink of an eye, the first glass of summer beer has been served to the people's table. Cui Wei once again came to Qinwan from Shennan because Qin Dong is about to start the yeast breeding and mutation.

There are several methods for selection and mutation, such as separation and purification, physical mutation breeding, chemical mutation breeding, hybrid and fusion breeding, genetic engineering breeding, etc. However, due to the limitations of the times and technology, Qin Dong chose ultraviolet mutation and strains mutation.

Today, like the other day, Luo Yuhui did not show up and Fang Lingxian did not show up.

"Although the five strains of brewer's yeast have different sources, some are used for traditional fermentation, and some are used for rapid fermentation in vertical tanks. They have basically the same morphological characteristics, identical physiological characteristics, and high fermentation degree in process performance..."

Zhou Yi took the notebook and reported earnestly, "The process performance is still different. The fermentation power and the cohesion power are strong and weak, and the fermentation degree is high or low. The most obvious is the diacetyl formation and reduction ability. The Beihai No. 2 yeast is far inferior. Other yeast..."

Qin Dong took the results in her hands, the small-scale test tender beer analysis results, the concentration change coordinate diagram during the fermentation process, and the diacetyl coordinate diagram during the fermentation process...

He looked at the huge colony of the No. 2 strain. Well, No. 2 is a traditional fermentation yeast with fast growth, good fermentation performance, smooth sugar reduction, and high fermentation degree. It has great advantages for traditional fermentation and cotton cake filtration.

But the shortcomings of the problem are too high to produce diacetyl, the peak of diacetyl in the early stage of fermentation is large, the ability to reduce diacetyl is weak, and diacetyl decreases very slowly...

"Yeast No. 4 produces the least diacetyl. In the early stage of fermentation, the amount of diacetyl is always at a low level, and the reduction is faster in the later stage. Diacetyl can quickly be reduced to below the taste threshold..."

Qin Dong smiled. He handed the book to Zhou Yi, "Okay, it's hard work, let Cui Wei also look at it. I'll do the next work."

"No hard work..." Zhou Yi touched the croissants shyly, "Uncle, what are we doing below?"

"Ultraviolet mutagenesis on No. 4 yeast..." Qin Dong put on a white coat, his temperament immediately changed, "Cui Wei, you and Zhou Yi prepare a spectrophotometer, constant temperature oscillator, water bath, centrifuge, microscope , Distillation unit, analytical balance..."

"Director Qin, someone from your factory is looking for you." Suddenly someone shouted outside the laboratory.

"Something is going on in the factory," Qin Dong took off his white coat again, "Let me say first, you follow what I said... Well, inoculate strain 4 into the conical flask of the wort liquid medium and shake it up. Incubate for another 14 hours in a 28°C incubator..."

After speaking, he opened the door and hurried away.

Qin Dong went out, but Zhou Yi didn't do what Qin Dong said. She smiled and looked at Cui Wei, "Your master is gone, let's rest for a while." She magically took out half a packet of calcium milk biscuits, and the two of them I went outside and sat on a stool to eat.

Cui Wei smiled, Zhou Yi is a treasure bag, and any snacks may appear, "By the way, why do you call my uncle master?"

"My dad asked me to call him that," Zhou Yi said helplessly. The two little girls were about the same age as Qin Dong and shared a common language, "I can't help it."

Seeing Zhou Yi's slight contortion, Cui Wei comforted, "Just call his master, okay? My master has the ability, don't look at the turtle, you can't beat my master."

"You curse." Zhou Yi immediately smiled.

"Mistaken tongue," Cui Wei laughed. The two looked at each other and both laughed together. "The turtle is concentrating on the experiment, and my master also has to take care of more than 300 people eating and drinking," Cui Wei was doing Qin Dongming. Unfair, "But, that's it, my master can definitely beat him!"

...

At night, Qin Dong returned to the laboratory, "Turn on the 30-watt UV lamp to preheat for 30 seconds to make its power stable..."

"Take a ring of slant bacteria platform and mix it in 20ml wort, activate it at 28 degrees and incubate for 14 hours..."

"Centrifuge four milliliters of culture medium at 3000 revolutions per minute for fifteen minutes, discard the supernatant and wash with four milliliters of physiological saline, and shake on an electromagnetic vibrator for about ten minutes..."

...

One step at a time, Cui Wei and Zhou Yi remembered very carefully. The door was suddenly pushed open, and Fang Lingxian walked in. He did not disturb the teacher, apprentice, uncle and nephew, and he picked up the experimental record on the table.

Oh, he couldn't help but put the book under the bright light, and he read it out gently, "Thirty centimeters under a 30-watt ultraviolet lamp shines, adjust the shining time, 0, 35, 40, 90, 120,... …

Preliminary screening and re-screening after mutagenesis......?!"

Fang Lingxian looked at the busy Qin Dong, Zhou Yi and Cui Wei inside. He put down his notebook, turned around and went out again. His steps were very light and there was no sound.

The laboratory is in the center of the factory, next to the production workshop. When he heard the roar of the machine again, Fang Lingxian couldn’t help but looked back at the direction of the laboratory. He shook his head slightly, “I’m the deputy technical director, have you Should I be crowned?"

Qin Dong invented the de-marking machine and improved the filling machine. He also improved the beer saccharification process and won various awards. Now he has selected new yeasts, whether it is mechanical equipment technology or beer brewing technology, Fang Lingxian has The self-feeling gap is too big.

"I'll report to the factory tomorrow, I should go back to Qin Beer!" When he got home, he said to his wife very disappointed.

"Why, Qin Beer asked you to go back? You were just a deputy section chief. Besides, how effective is Rong Beer now..."

"No matter how good I am, I have to go back," Fang Lingxian, who has always been polite, suddenly rose up, "It's better than being embarrassed there."

"You took the wrong medicine today," my wife was terrified. "Okay, I'll talk about it tomorrow..."