A powerful country in scientific research

The next day, early in the morning.

Su Ran was thinking about plastics, so she arrived at the test field early. When she arrived, Zhang Xue and Li Yun were not there yet, so she went straight into the laboratory.

Today we are going to test the biodegradability of plastics.

There are many types of degradation performance tests for degradable plastics. Su Ran chose the three most representative ones: biodegradability test, soil degradability test, and water decomposition test.

Su Ran went to the system laboratory to get the tools he needed, including culture dishes, balances, heaters, pH meters, centrifuges, etc. After all the tools were ready, he started testing.

She first conducted a soil degradation test. The principle of this test is actually very simple, that is, putting the new plastic into the soil and observing its degradation. In the soil, degradable plastics will be affected by soil microorganisms, temperature, humidity and other factors, and will slowly degrade automatically, and the degradation products will be absorbed and utilized by microorganisms in the soil, reducing damage to the soil.

Ordinary plastic bags cannot be degraded by soil microorganisms and accumulate in the soil over the years, polluting the environment and becoming what modern people call "white garbage."

The testing procedures for biodegradation test and water decomposition test are similar to those for soil. After Su Ran finished them one by one, he put the culture dish aside.

She looked at the rows of petri dishes on the shelf in the corner and sighed. The next step was to wait.

She had read a sentence in a book before: "It usually takes weeks to months to get results from laboratory tests on the degradability of bio-based degradable plastics."

Su Ran was a little scared. She didn't want to wait that long. After all, it was autumn, the best time to build a greenhouse. She couldn't wait for weeks or months, so she made some small "accelerators" to speed up the experiment.

For example, in the hydrolysis test, the temperature and pH value of the water are adjusted to speed up the hydrolysis reaction. In the biodegradation test, the degradation reaction is accelerated by adding appropriate amounts of bacteria or biological enzymes. This can speed up the test in a short time.

But you can't rush things. You can change the conditions but you can't change the test conditions excessively, otherwise it will affect the accuracy of the test results. So although Su Ran has accelerated, he still has to wait.

She thought to herself, since it's accelerated, it shouldn't take too long, right? ? Hopefully the results will be out next week!

~

It’s not even next week yet, but Su Ran has already welcomed a big event - the experimental fields are about to have their “autumn harvest”.

The sun shines warmly on the experimental field, and the corn cobs sparkle through the golden scales, looking particularly dazzling. The breeze blows gently, making the long corn leaves flutter in the wind, as if greeting people.

The experimental field was full of people picking corn. They were the people the team leader had called over to help harvest the corn.

They deftly pushed aside the corn leaves, looking for the largest corn cobs, and with a strong pull, they pulled out the golden corn cobs.

Su Ran was also helping, but she didn't pick the corn. She was recording the weight of the corn. Zhang Xue and Li Yun were weighing it nearby. They reported a number and Su Ran recorded it very quickly.

Most of the members of the Qinghe Brigade lived in the south. There were few people living in the north, and it was all wasteland, so few people came here. Therefore, most people only heard that the corn in the experimental field grew fast, but never saw it.

The team members who were watching the excitement were all surprised to see the scene in front of them. It had only been more than three months, and the corn could be harvested? The corn they harvested a while ago was planted in April! Wasn't the experimental field planted in July? It was ripe already? Although they were reluctant to believe it, the plump golden corn in front of them told them that this was the truth. No matter how incredible it was, it was the fact.

After they accepted this mysterious thing, they began to feel emotional.

"As expected of an expert in a big city, you are really amazing."

"I don't know what he used, but he grew so fast in just three months."

"I heard from the captain's daughter that it's called a high-strength fertilizer, and it's much better than chemical fertilizer."

"I know about chemical fertilizers. My mother's family in the next commune is using them. They are very expensive." The middle-aged woman said, clicking her tongue twice. "Besides, the effect of chemical fertilizers is not as good as this one. It's far worse."

"They say they are experts from big cities. Maybe their fertilizers are better."

~

During the break, Zhang Xue looked at the bags of corn piled on the ground beside her and felt extremely excited. More than three months of hard work and unremitting efforts finally paid off at this moment of harvest. She looked at Su Ran who was lowering his head beside her with burning eyes. When would she be as good as Su Ran?

Li Yun watched the busy team members in the experimental field and the corn harvest scene in the experimental field, and her eyes slowly turned red. It took only three months from planting the seeds to harvesting the corn field. She knew that the reason for this was the fertilizer developed by Su experts. The fertilizer developed by Su experts was really easy to use. And the pig feed, the pigs in the pigpen grew so fat, all because of the feed!

She looked at Su Ran with gratitude. They should no longer be hungry or cold! Her father was right. Expert Su was the lucky star of their team!

She is so lucky to be chosen by Expert Su as an assistant!

Thinking of this, Li Yun smiled with her eyes curved. She would definitely cherish this opportunity.

After a busy day, more than a dozen people finally harvested more than ten acres of corn in the evening. After that, Su Ran let them go home.

She doesn't need to pay for wages or anything like that, as there is a team leader. She is here on a business trip, and the expenses will be covered by the higher-ups, so she doesn't need to worry about it.

At this moment, Su Ran was grinning from ear to ear as she looked at the corn piled up like a small mountain. He Cheng looked at her silly smile and thought it was very cute. He couldn't help but reach out and gently rub her hair. The soft feeling made him feel warm in his heart.

He Cheng came after get off work. At that time, the corn had not been harvested yet. He helped for a while. After everyone had left, he came over to help Su Ran weigh the corn. There was only one scale, so the weighing was slow, and now half of the corn has not been weighed yet.

Su Ran pouted and complained, "You messed up my hair."

He Cheng rubbed it twice more rebelliously.

Su Ran glared at him and protected her head with both hands to prevent him from committing any more crimes.

Unable to touch the soft hair, He Cheng felt his hands were empty.

Zhang Xue, who was standing next to them, rolled her eyes at the two people flirting and said unhappily, "Alright, alright, there are still so many single people out there, be careful of the impact!"

Su Ran smiled embarrassedly, and when no one was paying attention, she glared at He Cheng. It was all his fault!