Engaged in construction in the 1970s [MTL]

Chapter 84 Air conditioning

Probably because Ye Ling's reputation is too loud in the capital, Rao is Beijing Institute of Chemical Technology has vacated the largest auditorium for Ye Ling to attend classes, and the students who came here still crowded the auditorium, and basically the students of Beijing Institute of Chemical Technology have come, and there are even some faces that Ye Ling has seen in the Department of Pharmaceutical Chemistry of Jinghua University.

It's a pity that Ye Ling hasn't been in the Department of Medicinal Chemistry for a long time, and she hasn't lived in the dormitory to live that kind of collective life, so she can't call the names of those familiar faces, so she can only nod and smile.

Raising his wrist and looking at his watch, seeing that the time had reached the point of class, Ye Ling cleared his throat.

"There are so many people coming to class today...... In order not to delay everyone's time, I won't talk about that nonsense, My name is Ye Ling, and everyone must have known it before. The content we are going to go on today is the "Fermentation Method" that you have in your hands, this book was compiled a few years ago, and I recently read it from beginning to end, but the mistakes have not been found for the time being, but some omissions have been found. But don't worry, I'll get to it. The main rhythm of the course is still according to this "Fermentation Method", and occasionally something will be added, and I will talk about it when I talk about it. "

"First, let's talk about fermentation. Let me ask you a question, what fields do you think you can use to learn and understand the "Fermentation Method" in your hand? "

Ye Ling's gaze swept over the students in the auditorium, her eyes full of hope, she hoped that someone would stand up and answer this question.

In Ye Ling's expectant gaze, a boy with a face looking at some vicissitudes stood up, "It can be used to make steamed buns with noodles."

The auditorium burst into laughter.

Ye Ling nodded at the boy, motioned for the boy to sit down, and asked the others, "Is there anything to add?" "

Seeing that everyone lowered their heads neatly, Ye Ling smiled, and had a rough estimate of the level of the students in the auditorium, so he stopped selling it.

"Noodles...... There is indeed a fermentation process, but our common steamed buns and steamed buns are not all fermentation processes. When you steam steamed steamed buns, you need fermented noodles because the fermented noodles are softer and loose and porous inside, this is because microorganisms are involved, and some people add baking soda to the noodles, in fact, it is the use of the chemical principle of acid-base neutralization, and the gas generated in the acid-base neutralization process is used to stretch out the pores. "

"In addition to the fermentation of flour, there are actually many things that use fermentation technology, such as farmhouse fertilizer that we are all familiar with, and many antibiotics that we are familiar with.

"To talk about fermentation, we must first understand the most common microorganisms in nature......

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The summer of '79 was very hot, and the cicadas of the Beijing Institute of Chemical Engineering were endless.

When Ye Ling first went to the Beijing Institute of Chemical Technology, although the weather was a little cold, the temperature in the auditorium was just right, but later, the weather became hotter and hotter day by day, and the students in the auditorium became more and more day by day.

The school leaders of the Beijing Institute of Chemical Technology understood that Ye Ling's class was too hot, so they bought two electric fans and put them on the podium to blow at Ye Ling, and they were embarrassed to blow Ye Ling.