1. Please explain the dual-mode theory during gas dissolution.

2. Please explain what are the main control parameters of the fermentation process?

3. Please explain the meaning of each symbol of the Monod equation.

Chen Nian was stunned.

Isn’t this a professional course in fermentation engineering?

And this was all learned in college, and it was useless for a long time after graduation.

But these things are still remembered in old age.

There are 4 dual-mode theory:

1. Oxygen first diffuses from the gas phase to the contact interface between the two phases of gas and liquid phases, and then enters the liquid phase. One side of the interface is the gas film and the other side is the liquid film. Oxygen diffuses from the gas phase to the liquid phase must pass through these two films (please check the rest) dual-mode theory

...

As for the fermentation process, there are 15 main control parameters:

There is also the last Monod equation, which I still remember in the old age, and these are the most basic ones.

μmax is the maximum specific growth rate of microorganisms, h-1; c(S) is the mass concentration of restriction nutrients, g/L; KS is numerically equal to the mass concentration of restriction nutrients, and its size represents the affinity of microorganisms for nutrients, that is, the larger the KS, the smaller the affinity of microorganisms for nutrients. When μ=?μmax, KS is numerically equal to the mass concentration of restriction nutrients. Click to view the equation

After answering these three questions, Chen Nian saw that there were still molecular biology questions later.

For example, how to understand that eukaryotic genes are breaking genes? What are the differences in gene transcription between eukaryotic cells and prokaryotic cells?

After answering the question of molecular biology, biological oxidation appeared later:

Write out two respiratory chains (electron transmission chains) in the order of electron transfer and indicate the location where ATP is generated.

There are also the last series of explanations of biochemical nouns, such as ribozymes, amino sugars, saponification values, color reduction effects and color enhancement effects.

After answering professional course questions, there are also calculus, such as using the Luobida law, infinitesimal substitution and other methods to find the limit; also finding the derivative of the hidden function, finding the tangent of the curve, proving the inequality, etc.

Although these things look familiar, some of them still need to be thought about.

But what's so bad is that these questions have time limits, and time is basically only enough for him to answer the answers, and he has no time to think about it at all.

For those professional questions, Chen Nian can still answer them while looking at the questions, but if it needs to be calculated, Chen Nian needs to think about it. Moreover, these questions are a little more difficult. If you don’t leave enough time in front, you will definitely not be able to complete English when you get to the high-level mathematics in the future.

Therefore, this has led to the process of repeating the questions.

The questions will be refreshed every time, which means that the questions you answered before will be re-entered in the question bank and then drawn out.

But the number of question banks is enough to be thousands.

The probability of trying to achieve the questions you have answered before is too small.

This is harder than any test in the past. Now he understands that what really tortures people is not the so-called distinction between dreams and reality, will it be crazy, and the dreams that do not affect the real self.

What really torments is the high mathematics!

I don’t know how long it took, but Chen Nian felt that he was like when he was taking the driver’s license. When he was about to finish all the questions in the question bank, he finally heard the other Chen Nian’s voice that was both expectant and crazy.

[Pass the exam, pass the rehabilitation]

"I've finally passed the dog recipe!"

This is the last thought of the old one before returning to reality.

...

"Alipay received 1 million yuan."

As usual, Chen Nian was woken up from his dream by an alarm clock, and opened his eyes to stare at the ceiling. Chen Nian couldn't help but sigh.

Until now, his brain has some things like finding guidance, the integral of the Law of Lobida, limits, infinity equivalents, glutamate, lysine, yeast, starch, hydrolyzed sugar preparation methods, etc.

"This is a nightmare!"

Chen Nian is still a little surprised. After all, although he often took exams when he was in school, he wouldn't be as nervous as this time.

In the past, Chen Nian was very calm every time he went to the exam, and could even wait until he came out before saying to his classmates: "I'm done and I don't know many questions this time, and many of them are just blindly confused."

Finally, after the results came out, they ranked among the top.

It aroused everyone's anger.

Scolding old people to show off together.

"Huh~"

Chen Nian took a long breath, turned over and got up to wash.

The sound of water rustled and gradually returned to his consciousness. He began to think about what he was going to do today and what he did in reality a few days ago.

After washing up, Chen Nian went to Honghong Hotel while listening to An Hongdou's new song.

He arrived a little late today. Before he arrived at Honghong Hotel, he saw Brother Liu's Syrian War Damage Class van waiting in front, while Brother Liu was smoking a cigarette with the window open.

"Brother Liu has arrived long ago?"

"No, I just arrived. Look, I just lit the cigarette."

"Thank you for your hard work, Brother Liu, wait for me to open the door."
Chapter completed!