Chapter 33: Science in the Kitchen

Mao Jin's athletic ability is very weak now, and even if he wants to raise his hand, he can't do it. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 info She simply crawled on the dining table, just looking at Cheng Xiao so stupidly that she seemed to never get enough.

At this time, she saw that Cheng Xiao was frying eggs, and she stood up slightly, and suddenly asked: "Big brother, the ancients said: 'Chickens give birth to eggs, and eggs break to give birth to chickens.'" 'Is there a chicken in this world?' Or did it come first? Cheng Xiao was stunned for a moment, then continued to turn over the eggs in the pot and said, "The ancients didn't know the modern theory of biological evolution, so they naturally couldn't figure it out. If you think about it from the point of view of modern biological evolutionary theory, you will quickly come to the answer! Mao Jin thought for a while, but then shook his head and said, "I can't figure it out!" Cheng Xiao said: "There are eggs in this world!" Mao Jin just looked at Cheng Xiao's back and asked, "Why?" Cheng Xiao continued to turn over the eggs in the pot and said, "Genetic mutation is the raw material of biological evolution, and the selection of the environment determines the direction of biological evolution. Genetic mutations are highly random. In the case of the same species, it may produce different new traits at the same time due to the mutation of one gene into multiple genes. Then these organisms with different new traits will be selected by the environment, and the organisms with favorable traits will survive, and the organisms with unfavorable traits will be eliminated. As these eliminated organisms die, so do the new genes produced in their bodies as a result of mutations. And those organisms that survive, they pass on this favorable new gene to their offspring. Even if they die, this gene will be present in their offspring. ”

"But not every mutated gene can be passed from parent to offspring. Only mutated genes produced by both parents during the formation of germ cells can be passed on to their offspring. If there is a genetic mutation in a somatic cell, the cell becomes a cancer cell. There are only two results, either the cancer cell is cleaned up by the immune system in time and disappears; Either this cancer cell is not cleaned up, divides and multiplies to form cancerous tissue, and eventually forms cancer, causing the organism to die. If this happens to people, there is one more possibility: the cancerous tissue will be medically removed! Either way, it's impossible for this mutated gene to be passed on to the offspring! To put it simply, the mutated genes produced in the germ cells can be passed on to the offspring, but the mutated genes produced in the somatic cells cannot be passed on to the offspring. But if cloning is to be used, that's a different story! ”

"Before the emergence of chickens, there must have been no genotype corresponding to them. It can only be genetically mutated by other pre-existing species to produce a new genotype corresponding to chicken. And if this new gene wants to be inherited, it must first appear in the germ cells. It's in the egg. Therefore, in this world, there are eggs and then chickens! It's just that this one gave birth to the first chicken? The "egg" creature must also be a species very similar to the chicken! ”

Cheng Xiao talked a lot, and he was not afraid that Mao Jin would not understand. No matter what he said, Mao Jin has graduated from high school now, and the things he just said are all things in high school biology textbooks. Besides, Mao Jin grew up under his teaching, and her intelligence is not comparable to ordinary people.

It's just that Cheng Xiao never thought of this, because he always thought that he was an imbecile, and he was smart and clever, not taught by him, but by her nature.

At this time, Cheng Xiao had already fried eggs and was making braised eggplant. Mao Jin looked at the eggshell that Chengxiao had lost, and suddenly asked, "Big brother, does the eggshell contain a lot of calcium?" Cheng Xiao replied, "Yes! What's wrong??" Mao Jin said: "I have a classmate, in order to replenish calcium, she grinded the egg shell and put it in the rice!" Do you think this will work? ”

"Poof—"

Hearing this, Cheng Xiao burst out laughing, what kind of logic is this? Seeing Cheng Xiao like this, Mao Jin couldn't help but ask again: "Big brother, is there something wrong?" Cheng Xiao finally held back and said with a smile: "Egg shells contain a lot of calcium. But has she ever wondered if these calcium elements can be absorbed by people? Limestone and marble contain a lot of calcium, is it possible that adults have to eat stones in order to supplement calcium? If you really want to supplement calcium, the best thing to do is to drink bone broth. The calcium content in bone broth is also extremely high, and even calcium tablets may not be as good as it. And the most important thing is that it is quickly absorbed by the body! Besides, calcium supplementation is not always better. Especially in mammals, when there is too much calcium in the body, it can cause muscle weakness. ”

In the eyes of Mao Jin, Cheng Xiao is omniscient and omnipotent. So as long as she stays with Chengxiao, she will have endless questions. And it is precisely because of the perfect image of Chengxiao in her heart that her dependence on Chengxiao has reached a point of no return.

Cheng Xiao's hands and feet were very fast, and after making the braised eggplant, he fried the lean meat. The last dish is fish. He looked at the fatty fish, then turned to Mao Jin and said, "Mao Jin, the big brother wants to make it into a sour soup fish, can you eat it?" Mao Jin smiled: "As long as it is done by the big brother, it is the best!" When Cheng Xiao saw Mao Jin say this, he turned around again, and said without looking back while busy cleaning the fish: "This fish is a little fat." If you braise it or steam it, it will have a lot of fish oil in it, and it will inevitably be very greasy. This is not the case with fish in sour soup, where the fat is broken down into higher fatty acids under acidic conditions and when heated. In this way, not only does the greasy feeling get rid of it, but the fatty acids are more easily absorbed by the body! Mao Jin smiled: "It turns out that there is so much knowledge here!" Cheng Xiao smiled: "Of course! Even if it's a lot of little things, there are a lot of scientific principles in it. It's this kitchen, and it can't be said for a while! Mao Jin, do you know why there is a fragrance after stir-frying and putting cooking wine? Mao Jin tilted his head, thought for a while, and said, "It seems that some chemical reaction has occurred and something has been generated!" "She has loved literature since she was a child, so she didn't know much about these things, and when she went to high school, she also chose liberal arts. Although these were just simple things, she still couldn't figure it out.

Cheng Xiao said: "That is because of the esterification reaction, which formed low-grade esters. Most of the lower esters have a fragrance. Cooking wine is an alcohol, and organic acids such as amino acids, fatty acids, and even nucleotides are often present in the ingredients. Acids and alcohols are mixed together to react to form esters during cooking. The food is also fragrant! Mao Jin nodded, she saw that Cheng Xiao was mixing water with sugar and salt and putting it in the pot, and suddenly said: "Big brother, last time I heard my grandmother say that boiling sweet wine is also about luck, is there such a thing?" Cheng Xiao said with a smile: "Boiling sweet wine only uses the amylase produced by yeast to hydrolyze the starch in the grain into glucose. Although it is also a sugar, the sweetness of glucose is stronger than that of starch. So after fermentation, it has a sweet taste. Since the yeast is in an anaerobic environment during fermentation, it undergoes anaerobic respiration. The yeast produces ethanol during anaerobic respiration, so the liqueur has a boody aroma. As for the word "luck", this is completely unfounded. The quality of sweet wine is determined by the fermentation environment! For example, the temperature, the amount of koji, the presence of salt, oil and other miscellaneous bacteria will affect the quality of the dessert wine......"

Since he was a child, Mao Jin has loved to ask Cheng Xiao this and that. And it is precisely under the teaching of Cheng Xiao that she has become so smart now. Cheng Xiao said like this while cooking dinner. After another ten minutes, Cheng Xiao brought the four dishes to the table. Then he fed the brocade bite by bite.

The motor nerve center of the motive nerve was damaged, and most of the exercise ability was lost. That's why she now has to feed even her food.

Chengxiao can't treat anyone as much as he treats Mao Jin. In fact, even he didn't know why he was so good to Mao Jin! Why do you care so much about her? In other words, if you reach this age, I'm afraid that there will already be an estrangement! Would it still be as intimate as this?

Unexpectedly, after only a few bites, the two lines of tears rolled down silently. Cheng Xiao had to put down the dishes and chopsticks, help her wipe her tears, and at the same time said, "Mao Jin, what's the matter?" Is it the big brother's cooking that doesn't taste good? Mao Jin choked up and said, "No! Big brother cooks very ...... It's delicious! Cheng Xiao asked, "Then why are you crying?" Is there something uncomfortable? Mao Jin said: "No! Big brother, how long has it been since you have eaten with Mao Jin like this? Cheng Xiao was stunned for a moment, and then counted silently in his heart, and said, "It's been more than a year, right?" Mao Jin said: "Mao Jin has grown up with his big brother since he was a child. During the period of time when the big brother was away, Mao Jin really ...... It's so lonely! Cheng Xiao raised the rice bowl again, picked the rice and sent it to Mao Jin's mouth, and coaxed her: "Okay! Big brother won't leave the brocade like this in the future. Come! Eat the meal! After eating, your body will recover faster, and your big brother won't worry about you! Mao Jin nodded obediently and opened his mouth to eat. After a while, she raised her big watery eyes to look at Cheng Xiao and asked, "Big brother, what have you been doing for more than a year?" Does it matter? Cheng Xiao smiled: "It's nothing, big brother is just dealing with those bastards!?" Mao Jin was silent, and after a long while, she whispered: "Big brother, is Mao Jin too selfish?" Cheng Xiao smiled and said, "How can Mao Jin be selfish? Mau Jin is the kindest and most considerate person!?" Mao Jin shook his head and said, "But the big brother is so busy dealing with those villains, but Mao Jin is still complaining about the big brother here!" It's really too selfish! ”

"Bang bang bang-"

At this moment, the sound of crisp and rapid footsteps suddenly sounded in the hall. Cheng Xiao smiled and said, "Your sister is here!" Before he finished speaking, the kitchen door was opened, and Cheng Ying's voice suddenly sounded: "What? Your sister is not welcome??" Cheng Xiao smiled and said, "How dare you? My sister is here, how can I not welcome it??" As soon as Cheng Ying came in, she saw Cheng Xiao feeding Mao Jin to eat, and she couldn't help but say, "What's wrong with Xiao Mao Jin?" Cheng Xiao sighed and said, "Her motor nerve center is damaged and she has lost most of her athletic ability!" ”