The last human in the universe

Chapter 4 Populations
Zhao Changxing is not an expert in organic chemistry, but as an excellent astronaut who undertakes the important task of revitalizing human civilization, he also received relevant training when he was on earth.It is definitely not possible to do cutting-edge research, but it is still possible to digest and absorb the theoretical ideas of experts, and use this to make some elementary changes that can be flexibly adapted to different realities.

Reactors, catalysts, fume hoods, biological enzymes, energy modules, and other things were all finally made by him with the help of the existing things on the spacecraft.Everything is ready, he immediately started to try.

The first attempt failed.During the process of synthesizing methanol from hydrogen and carbon dioxide, due to operational errors, too much formaldehyde and other impurities were accidentally generated, which lost their use value and had to be thrown away.

This attempt took about three hours.

The second attempt took four hours and still failed.During the reaction process, the temperature was not well controlled, and as a result, all the synthesized organic matter was carbonized under anoxic conditions.

Now is the critical moment for the synthesis of starch, a type of carbohydrate or sugar.He has temporarily stopped the construction task on Sedna Star and devoted all his attention to it.

"Xiaoxi, report the pressure and temperature data."

"Good captain, the temperature is..."

"Element ratio?"

"normal."

……

Under Zhao Changxing's full attention, another five hours passed.This synthesis experiment has ended.If nothing else, this synthesis should produce about 50 grams of starch and some other by-products.

Carefully opened the reactor, looking at the thin layer of white powder scattered all over the tray, Zhao Changxing's heartbeat immediately accelerated.He carefully collected it and put it in front of his eyes to stare carefully.

The white powder seemed to exude a seductive aroma, which made Zhao Changxing's mouth unconsciously secrete saliva, and his stomach growled crazily.

He suppressed his hunger, and ordered: "Xiaoxi, take it for a test, and do a composition identification."

There is no doubt that this thing is starch, but the key question is how many impurities are mixed in it, and what are the ingredients of the impurities.If you accidentally eat some formaldehyde or methanol, you will be poisoned to death or your eyes will be blinded by poison, then the joke will be big.

Undertaking the mission of revitalizing human civilization, Zhao Changxing cherishes his body very much.

"Ok."

Little Xi Lisuo agreed, and immediately manipulated various equipment to start testing it.

The results came out very quickly.

"Congratulations, captain, these starches are very pure, with very few impurities, and you can eat them completely."

"That's fine."

Zhao Changxing immediately became happy.He rushed into the kitchen, lit the fire to boil water, and when the water boiled, he first mixed the 50 grams of precious starch into a paste with cold water. After the water boiled, he poured it into boiling water and stirred slowly.

After a while, a bowl of sticky paste came out of the pan.

Sprinkle salt, pour in a little soy sauce and sesame oil, pick up a spoon, and before it completely cools down, gobble them up.

A sense of satisfaction from a full stomach emerged, and Zhao Changxing only felt that his whole body was full of strength again.

Eating nutrient solution is different from eating starch.

"Now it seems that it is completely possible to solve the food gap by artificially synthesizing starch. It's just that the efficiency is too low now. It can only synthesize about half a catty 24 hours a day, which is not enough in terms of calories. Continue to improve. Either expand the scale, or increase the conversion ratio."

He recalled the data in these experiments, and made some explorations and improvements, and finally stabilized the daily output of a single reactor at 350 grams.In order to improve, he took the time to assemble a reactor, so that the daily output was 700 grams of starch.

700 grams of starch can provide about 2500 calories for the human body. For Zhao Changxing, who has to do heavy physical and mental work every day, the daily basal metabolism is almost the same, basically just the same.Even if there is a slight gap, it will not cause any damage to the body.

The only concern is the lack of trace elements and vitamins.After all, these artificial starches are not born in nature.But it doesn't matter, synthetic vitamin tablets can perfectly solve this problem.

The food problem was finally solved, and Zhao Changxing could finally devote his energy and time to the construction of the soilless cultivation workshop and replenishing the energy reserves of the spacecraft.

After installing the double screen door for the soilless cultivation workshop, Zhao Changxing immediately started the airtightness test.This job is relatively simple. He first put a barometer in the workshop, and then directly released various mixed gases from the gas-sealed tank, and kept pressurizing until the pressure was equivalent to two atmospheres before stopping.

Afterwards, he left here through the double screen door, connected the power supply from the Falcon spacecraft, and turned on the electric heating equipment in the soilless cultivation workshop to ensure that the temperature inside the workshop remained unchanged.After all, changes in temperature may also cause changes in air pressure.

Then all you have to do is wait.Of course, he was not idle during this time, but started collecting and transporting water ice again.After getting another large piece of ice, he started the next step of the construction task.

It is obviously impossible to have only one soilless cultivation workshop on Sedna.In the original plan, what the astronauts will build here is a comprehensive base that can accommodate 200 people.This base will use nuclear fusion as the power source and the soilless cultivation workshop as the food source, covering different areas such as living areas, office areas, and industrial areas.At that time, people can use the industrial equipment brought from the earth, such as simple ore dressing and refining equipment, metal processing equipment, etc., to try to slowly promote industrialization step by step.

Even, if there is missing equipment, people can rely on 3D printers to print it directly.Anyway, the database of the Tinder spacecraft records the blueprints of all the equipment in the history of human civilization, ranging from a small shovel to a nuclear fusion reactor.

After building the most urgent soilless cultivation workshop, the next thing Zhao Changxing wants to build is the life support area.The life support area includes nuclear fusion reactors, water circulation and purification systems, air circulation and purification systems, temperature control systems, and other systems necessary for survival.It will provide electricity, oxygen, water, and thermal support for all subsequent construction tasks, as well as the soilless cultivation workshop at this moment.

According to the original plan, the life support area was the first area to be built. After all, without it, the soilless cultivation workshop would not be able to carry out production.However, Zhao Changxing calculated that during the debugging process of the soilless cultivation workshop, it would be fine to spare a little time for the construction of the life support area.As long as it can provide support for the soilless cultivation workshop, the rest of the area will be postponed.

This does not require the construction of the life support area to be too perfect, and it will not take long.What's more, in the early days, the Falcon spacecraft can also directly provide power support for the soilless cultivation area.

Recalling the planning drawings of the entire base, with Xiaoxi's assistance, Zhao Changxing determined the construction site about 50 meters away from the soilless cultivation workshop, towards the west.

It is still an off-the-ground construction scheme supported by support columns.First use electric heating equipment to remove the tolin, solid gas, dry ice and other things in this area, so that the surface is exposed, and then use electric drilling equipment to drive in the support columns, fix them, and then lay the floor. This set of procedures, Zhao Changxing Already very skilled.

He ended the day's work when hitting the No.13 support post.Thirteen hours have passed since the soilless cultivation workshop was pressurized and inflated, but the time is not enough.This test must last for three days.

During this period of time, the Falcon spacecraft will stay here to provide energy for the electric heating equipment in the soilless cultivation workshop.Zhao Changxing could only communicate with Xiaoxi, and used remote control to land another spare landing spacecraft—the Falcon [-] spacecraft, and left here with himself.

Returning to the Tinder spacecraft, he first moved the building materials needed for the next day into the Falcon 500 spacecraft before he had time to rest for a while.At this moment, the two reactors have stopped working, and a total of about [-] grams of starch has been produced.

This process no longer needs Zhao Changxing's intervention.Xiaoxi possesses a certain degree of intelligence. As long as Zhao Changxing writes the entire procedure into a program, Xiaoxi can complete the follow-up work.What Zhao Changxing needs is to add raw materials, equipment maintenance, and the final harvest.

After cooking a large bowl of thick porridge and eating it deliciously, Zhao Changxing began to think about another matter.

Today, the construction of Human Base One—this is his name for the first human base that will be born on Sedna—has entered the right track.It is estimated that in another 70 days, the soilless cultivation workshop will produce the first batch of food. In about 8 months, the main buildings of the human base No. [-] will be completed, and in about a year, the entire base will be fully operational.

At this time, it is time to consider the issue of human reproduction.

Now is undoubtedly the time when the inheritance of human civilization is the weakest.There is only one human being left in the entire universe.If you die, the human race is finished.Population development is also a pressing issue.

It's just that he doesn't have much confidence in himself.After all, in the original plan, the task of taking care of young children and raising them up was undertaken by several female astronauts.

But this problem cannot be circumvented after all, it must be done.No matter how difficult it is, you have to grit your teeth.What's more, with Xiaoxi around, it should be able to share some of the burden for itself.

So, the first batch, how many people do you want to reproduce?
He gritted his teeth and decided to set the number at 10 people.

Five men and five women.

In this way, excluding the more than nine months of gestation in the artificial womb, after 18 years they will become adults, and they can have five more people to help them build the base.The remaining five will continue to raise the next generation, which can raise about 50 people.Still choose half male and half female, and this cycle, plus their natural offspring, when they die at about 90 years old, the population of human civilization will return to about 800 people.

This situation is still good.

He made up his mind.

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(End of this chapter)