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It was almost 12 o'clock when I returned to the dormitory, and I bought a hamburger at the bottom of the dormitory. Huskies returned to the dormitory, took a good nap, and started playing World of Warcraft.

Wake up to eat, and after eating, I still play World of Warcraft, eat something and continue playing until I am hungry, and start to sleep when I am sleepy. The husky played well for two weeks, of course, Lao Li had to ask her about her grades.Religion is okay, the teacher gave it a B- for the first time, and English is a bit miserable, just a C.The organic chemistry was a B+, the experiment turned out to be an A-, and the inorganic chemistry got an A without any suspense.Of course, Husky didn't dare to tell Lao Li so directly, otherwise Lao Li would definitely hold on to her English C.So in Husky's mouth, inorganic chemistry and experiment were downgraded to B+ and A-, and English became B-.Sure enough, after hearing this result, Lao Li just snorted a few times and told her to continue working hard next semester and nothing else.

The day before the start of the research with Professor He, the husky went to bed early, and it was eight o'clock when he opened his eyes the next day. He had a leisurely breakfast and walked slowly to the teacher's laboratory. It happened to be nine o'clock.Because Professor He will no longer be an official professor at the school next semester, his laboratory is just living in a corner of another big experiment.On the first day, as the required products had not yet arrived, Professor He just showed John and Husky how to use some equipment, and at the same time wrote down the reaction equations they might need.

The first day of the experiment ended so early that the huskies were caught off guard.So I simply ran to the nearby wholefood with my bag on my back to buy ingredients for cooking.

When I went to the lab again on Wednesday, the commercially available curcumin that the huskies needed for their first step had already been delivered.So Husky and John started refining.The purchased curcumin also contains other substances, although the proportion of those substances is only 1%, but this will still affect the experiment, especially in the second stage, Husky and John will try to start making curcumin Sometimes, they need to compare IR and NMR with a sample to confirm whether their product is curcumin.

The method of purification is easy to say, but it is not simple at all, and it takes a lot of patience.The method of physical purification is to use the difference in physical properties such as melting point, boiling point, or solubility to purify.As a practice, Professor He did not hesitate to let Husky and John start to crystallize and recrystallize. The only thing that pleased Husky was that Professor He also followed them to do it again, in case the two students made a mistake in any step. In the case of ruining the entire experiment, there is still a copy that can be used.

Ethanol, the universal solvent, was first thought of.But because alcohol has a relatively low boiling point, they also used other organic solvents.Then after the 0.1g of curcumin was completely heated and dissolved, the painful part came, the solution in the small beaker was all, slowly but not too slowly began to be filtered into the flask on ice.Slow because when passing through the filter paper, the liquid level cannot be higher than the edge of the filter paper.And it is not slow because, if the speed is too slow, crystallization may occur in the beaker due to cooling.After doing this, the filter paper should be washed several times with a solvent, so as to prevent the substances they need from remaining on the filter paper, but the impurities cannot be washed down together.

After that, Huskies and the others ensured that the ice in the huge beaker with the flask could not become room temperature within an hour, Professor He took the two of them to the restaurant for dinner.When they came back after eating, the three of them started to stare at each other, scrolling the webpage boredly, waiting for the crystals to precipitate.

"So, Ermin is back." When Huskies was scrolling through the Real Madrid post, John's words made Huskies look up at her involuntarily.

Back, back to school?Heading back to school?Husky nodded uncertainly, "I read the report, and in April, some people said that Ermin was back to school."

"No, no, no." John shook his head, and he handed the phone to Husky, showing her the Facebook photo on it, "Someone caught her, and she's in New York now."

Ermin in New York?Husky felt his heart beating a little louder.

"Someone saw her on the Upper West Side." John took back his phone and continued to scroll down on Facebook. "I hope no one will come to her for an autograph or something. Too many people are bothering her."

Upper West Side.Husky swallowed, and his fingers involuntarily slid towards his address book.It's 70th and 80th Streets there, only 30th Streets away from where they are now, and it may take up to 10 minutes to go there by subway.So, how about sending Ermin a text to say hello?

Husky suddenly woke up, and she quickly closed her address book.What are you thinking, husky, what are you going to say?Hey, I just saw on facebook that someone took your picture on the upper west side, so, welcome back?She doesn't need anyone to remind her that she is being watched and secretly photographed all the time, thank you.

Moreover, Husky felt a little bit disappointed. Ermin came back but didn't tell you, obviously she just didn't want to tell you.So, why bother.However, she doesn't seem to need to tell me... Husky smiled lightly, shook his head, and looked up at the filter bottle in front of him. Crystals continued to appear.

Husky put down his mobile phone and stood up, carried the large beaker to the pool, poured out the ice water in it, and then added a bunch of ice cubes to it.

"So, Professor He, do you think we can wait for it to recrystallize successfully today?" Husky, who was tortured by recrystallization in Organic Chemistry Experiment 1, asked.

"We don't need to wait for it to crystallize completely." Professor He picked up Husky and John's filter bottles and looked at them, then looked at his own filter bottle, "We just need to do an IR and NMR for these, so The amount we need is still relatively small." He said, shaking the two filter bottles slightly, and then glanced at the clock on the laboratory wall, it was past four o'clock, "Actually, let's finish today. These crystals are filtered out, and then wait for it to dry naturally. Although one night is enough, but," Professor He shook his head with a little regret, "my time does not allow me to come here on Thursday. It doesn't matter, we will meet again on Friday Come and do it. And I figured that by Friday, all the products we need should be here."

Vacuum filtration is not fun at all. I took a rubber tube to connect the filter bottle to the suction pipe, and then put the filter paper on the funnel. The sound of the wind, and then continue to slowly and slowly pour the product in the filter bottle onto the filter paper of the funnel, not only that, but also keep shaking, because those products that have received crystals are not so happy to come down.

After filtering, the three of them found a dry and undisturbed place to put the filter paper, wrote their names, dates, and products on the edge of the filter paper, and went back to their respective homes in style.If you have money, you can learn something, and you can go home early to eat and play games, this kind of research should not be too comfortable, okay?

When they arrived at the laboratory on Friday, Professor He led Husky and John to collect the dried product from the filter paper, then added a solution to dissolve it, took a drop or two and started IR.After running for half a minute listening to the creaking of the machine, Husky knew something was wrong when he looked at the picture of IR.Except for the peak of the solution, there is no other peak on the graph.

Looking at this picture, John also shook his head, took the slide out of the machine and began to clean it.The huskies put their own slides into the machine with trepidation.He looked at the machine with his heart in his heart, and when the blueprint came out, Husky also let go of his heart.All right, there is nothing there, you can go to clean the slides.

When Husky finished cleaning and wrapped the slides in paper and put them back into the jar, he saw Professor He frowning and looking at the computer. Husky leaned over and took a look.But this is very strange. It is unreasonable to say that the results of the three people are all exactly the same. They are all the peak of the solvent. Even if there are some mistakes in the middle process, it is impossible to say that the three people can't produce any products.

"I think there should be a problem with the solvent." Professor He stood up from the chair and walked to the side where there was a stack of solvents used for IR, NMR and CMR. He looked inside and took out A small box and take out the last small pointed bottle from the box.

"Let me try this." Professor He said, he put on the glove on his right hand as he walked out, then he opened the bottle cap of the pointed bottle, took some of his product and put it directly on the slide, and then used The plastic dropper took a little solvent, and after it was completely dissolved, Professor He covered the second slide and put it in the machine.Under the expectant eyes of the three people, the machine creaked again, and soon, the three people let out a sigh of relief at the same time, well, this time there are finally some other peaks.

"Okay." Professor He nodded, and handed the small bottle in his hand to John, "We will use this solvent, and you two will start to do NMR."

NMR, that is another thing that is more labor-intensive.is it difficultIt's not very difficult, as long as you can insert the test tube in the center and let the test tube rotate, it will be fine.However, this kind of thing will take more than ten minutes at the fastest.Of course, after that, patiently wait for the NMR spectrum to be read out, and then modify its messy background.

If those messy backgrounds are ignored, Husky and John's experiments are still very successful, and their products are almost similar to the NMR of standard curcumin.After practicing, I roughly knew the two spectrums of curcumin. Professor He waved his hand and ate first.Curcumin is still produced after eating.

In the first part, the relatively easy success made Husky a little bit smug, so she also somewhat forgot how low the productivity of organic chemistry experiments is.

First put the solute in the three-necked bottle, then seal the left mouth of the three-necked bottle, insert a thermometer on the right mouth, and set up a dropper with a cooling pipe on the middle mouth.After securing circulation of condensed water, heat and release solution.After cooking at high temperature for more than half an hour, after the solute is completely dissolved, open the left port, pour in another solute, then cook at high temperature for more than two hours, turn off the heat, and cool down.

Things became interesting at this time, three people, with the same method, actually made three colors. Professor He's solution is viscous, Husky's solution is reddish, and John's solution is like mud with water.

The three of them pursed their lips, hugged their chests, and stared closely at the three three-neck bottles. Professor He propped his chin and thought for a while, and decided to continue, so he began to extract.Generally, the extraction is actually to dry the solvent, and the remaining solute is basically the desired product.

It's just that it is very time-consuming to dry it like this, so Professor He directly used a heating device.The advantage of the heating instrument is that, first, it controls the temperature by the machine, so that the flask will not be overheated or the temperature is unstable.Second, it can be vacuumed so that the solute can be precipitated more quickly.Third, it also has a rotation, so it can evenly heat the entire flask.

After this step was done, Husky felt that Professor He might have a worse headache.Because if you just look at the appearance, these are absolutely three kinds of substances. The place where Professor He's product sticks to the wall of the flask has become dry, the husky's product has become more red, and John, I don't know if there is something wrong with his heating device or what is going on, the solvent inside seems to be stubborn Ken came out, still in the state of mud with water added.

"Hmm." Professor He touched his board with a headache, "I don't know what happened, but let's go home first. Maybe it will evaporate a little after three days. But no matter what How about it?" Professor He clapped his hands, "Our plan for the next week is to try to purify these first, and then test IR and NMR as much as possible. We need to go through this whole set and let you understand the whole process. After that, we definitely need to synthesize it again, or even more times. After you are very familiar with the whole multi, we can take a look at what needs to be improved, which can increase our generation rate, and then we will proceed. third step."

"Sounds like a plan." John nodded and started packing up.

Husky looked at their three three-necked flasks standing there, and was not sure about one thing. Can this thing really extract curcumin?However, I followed all the steps the professor said, and there is no problem with the temperature control, so it is unlikely that there will be mistakes.

When I got home, had dinner, turned on the computer and started playing games, Husky slowly forgot about it. Anyway, if something happened, the professor came to think about how to deal with it.

Since the next day was Saturday, Huskies had nothing to do, so Huskies and his cousin came out at [-]:[-] in the morning, after taking a shower, and when they were about to go to bed, they glanced at their WeChat.Xiang seems to have returned to China, because she sent a bunch of exclamation points to Huskies.

I've had salt and pepper chicken nuggets with sauced skeleton cod cheeseburger! /(ㄒoㄒ)/~~It’s so delicious that I’m going to cry, but the venison dumplings are a bit old and a little bit showy, and they are obviously made after quick freezing. Next time, remember to remind me not to order it!I love you love you love you!Go to your house for dinner tomorrow hahahaha!There are eels!There are ribs!There is shredded beef!There is also rice with eight treasures!Ha ha ha ha

In the middle of the night, the huskies showed themselves hungry.She licked her lips, swallowed, and rubbed her growling stomach.The husky wants to cry, and she also wants to eat the sauce skeleton, shredded eel, chicken chop and eight-treasure rice.Why is it that my father cooked the meal, but I can't eat it by myself...

Husky sniffed, and she said to Xiang: Brother hates you.

The husky then threw the phone aside, feeling homesick.