The last human in the universe

Chapter 3 Artificial Synthesis
Although the Falcon spacecraft is a landing spacecraft, the original engineers equipped it with a high-power fusion engine that clearly exceeded the requirements.This design is of course useful. At this moment, Zhao Changxing directly took out a drilling machine that can work in a vacuum and low temperature environment, directly connected the power supply to the Falcon spacecraft, and started working with its energy.

The soilless culture workshop is not intended to be built directly on the ground.The reason for this is that, firstly, it takes into account the amount of work required to level the ground, and secondly, it is due to the need for heat preservation.Zhao Changxing needs to drill some holes on the ground first, fix some support columns, and then lay walls on the support columns.

When the second phase of the permanent building is being built, Zhao Changxing will need to spend energy and time leveling the ground.

Amidst the debris splashing, with the help of the high-precision rangefinder and Xiao Xi, Zhao Changxing fixed the supporting pillars with self-expanding bottoms on the surface of Sedna Star one after another.They line up with each other and are at exactly the same distance from each other.

The first batch of supporting columns has a total of 100 columns, occupying an area of ​​[-] square meters.

After that, the floor of the planned soilless cultivation workshop was taken out.They are very thick, a full 25 centimeters, and a series of things such as water and electricity channels, monitoring components, insulation layers, radiation protection layers, etc. are integrated inside.

All the complicated things had already been done when they were originally designed and manufactured, and all the astronauts needed to do to reach Sedna was simply to splice them together.

Also with the help of the rangefinder, Zhao Changxing fixed the first square floor with a side length of one meter on the four supporting pillars, followed by the second and third, and it took 15 yuan to lay the floor. The work of logging in this time is over.

This time, all the things carried by the login have been installed.

Looking at the time, nearly eight hours had passed.Touching his growling stomach through the space suit, Zhao Changxing did not directly board the Falcon spacecraft to go back, but returned to the spacecraft and took out some tools.

At this moment, on the Tinder spacecraft, in addition to food, the reserves of water, oxygen, and fusion energy are all in an emergency.He had to bring some supplies back, otherwise, in two days at most, the entire spaceship would be shut down.

In fact, for Zhao Changxing, water, oxygen, and fusion energy are all the same thing.All three can be replenished as long as water is available.Because water can be electrolyzed into hydrogen and oxygen, oxygen is used for breathing, and hydrogen can be used as fusion energy.

On Sedna, there is no shortage of water, but pure, large chunks of water ice are rare.They are mostly mixed with Thorin, dry ice, solid gas, interstellar dust, etc.In order to reduce the follow-up workload, Zhao Changxing still planned to go a little farther and get some mixture with higher water content back as much as possible.

With the Huozhi spacecraft watching from the sky, Zhao Changxing was not afraid of getting lost in this cold and dead dark red world.

Walking towards the east—the direction in which the sun rises for this planet—about a kilometer, Zhao Changxing found what he wanted on the edge of a cliff.

For the extremely hard water ice that is frozen, mechanical cutting is obviously unwise.In this environment, heat cutting saves the most effort.He took out the electric heating knife he was carrying, and slowly inserted it into the ice cube mixed with various impurities.As a result, without seeing the slightest mist, cracks appeared very quickly at the place where it touched the electric heating knife.

In less than half an hour, a large block of ice with a volume of less than one cubic meter and a mass of less than one ton was cut.

But when trying to drag this large piece of ice away, Zhao Changxing slipped, staggered, and fell straight down.

The gravitational acceleration of Sedna star is only less than 0.5 meters per square second, so he fell towards the bottom of the dark and deep cliff at a very slow speed compared to the earth, and fell on the ground.

One side is a smooth cliff, and the other side is also an endless flat land.He patted his head lightly, got up and planned to take a detour back to the top.But in the next moment, he realized that this was not Earth, but Sedna.

His legs were bent, and the next moment he straightened suddenly, so his body flew up unsteadily, jumped more than ten meters high, and jumped directly from the bottom of the cliff to the previous place.

This time he was a lot more careful, and finally managed to fix the large piece of water ice.

Even on Sedna Planet, this piece of water ice weighs about a hundred catties.He dragged it back with a rope.After placing it, I drove the Falcon spacecraft back to the Ignition spacecraft tiredly.

Nearly a ton of water is enough for him to do many things.However, the water, oxygen, and fusion energy reserves in the Pylon spacecraft are seriously insufficient, and they will have to be continuously replenished in the future.I'm afraid that in the days to come, every time he goes down and comes up again, he will have to find a way to bring some water back.

After relying on heat to melt this large piece of ice, and separating the rest of the gas during the melting process, filtering and purifying it, and pouring it directly into the electrolysis equipment, Zhao Changxing had time to take a bath and have a bite of food .

Zhao Changxing was starving after not eating for more than ten hours.But this meal is only 30 grams of meat, a small bowl of rice, plus some vitamin tablets and a large glass of water.

After eating these things, the hunger in the stomach not only did not disappear, but became more and more serious.But he could only endure it.After all, the next meal is eight hours away, so I can't mess up my eating plan.

During this rare rest time, he once again began to think about the extremely important question of where to get food.But unfortunately, he still got nothing.

For the next few days, he maintained this kind of life and rest, constantly going back and forth between Star Sedna and the Pyros spacecraft, pulling down boxes of building materials and bringing back pieces of water ice until until the last bite of food is eaten.

Now, he has absolutely nothing to eat.But the construction task must continue without delay.

Gritting his teeth, he entered the medical center, took a few packs of nutrient solution and drank it full of heartache, only to feel his body regain a little strength.

This stuff is for emergency use when you or others get sick in the future, and you can’t make it yourself before the industrialization process starts. If you use one bag, you will lose one bag, which means that a certain patient in the future may lose his life because of it.But there is really no way now, so I can only use some of them first.

But this is obviously not a long-term solution.The most fundamental problems remain unresolved.

On this day, he still landed on Sedna and worked for more than eight hours until he installed the last roof slab.As a result, a large house with a total area of ​​100 square meters, supported by a hundred thick support columns, about one meter above the ground, was built.

Of course, what has been built now is just a shell, and a lot of equipment installation and debugging work will be required in the future. Only when everything is done can it be put into operation.At this moment, it didn't even have time to do the sealing work, and the inside was still in a vacuum state.

Standing at the door where the isolation door has not been installed, looking at the endless darkness in the distance and the dots of stars in the sky, Zhao Changxing fell into long-term contemplation.

On this planet there is water, carbon dioxide, methane, ethane, gold, silver, copper, iron, etc., and countless other substances, but there is nothing to eat.

Suddenly, an idea flashed through Zhao Changxing's mind.

"I don't have anything to eat, so I'll make it myself! This is the only way to do it now, and if it doesn't work, I have to do it!"

He gritted his teeth and made up his mind.

Riding on the Falcon spacecraft, he returned to the Tinder spacecraft again.After that, he threw himself in front of the computer, and with Xiaoxi's assistance, he began to search through the vast library.

Almost all scientific data of human civilization from its birth to its demise are recorded here.From the postpartum care of sows to the blueprints for the construction of the Tinder spacecraft, everything is here.

"found it!"

Suddenly, Zhao Changxing's eyes lit up.

It was a paper titled "A Novel Electrically Driven Artificial Photosynthesis to Fix CO2 to Synthesize Sugars."

Among a series of characters, Zhao Changxing keenly picked out what he needed.

Theoretically speaking, staple foods such as rice or wheat, or potatoes and sweet potatoes are all carbohydrates, and this is the main source of energy to maintain the survival of the human body.Therefore, as long as we can find a way to synthesize carbohydrates through artificial means, we can solve the food problem.

Carbohydrates are composed of three elements, hydrogen, oxygen, and carbon. In theory, people can directly synthesize them from two things: water and carbon dioxide—as long as the carbon dioxide can be fixed.

In the human world in the past, there were not many studies on this aspect, the reason is very simple, it is really unnecessary.Because in nature, plants fix carbon dioxide through photosynthesis to synthesize sugars, that is, carbohydrates are too common, too simple and cheap, and there is no need to spend a lot of time, using extremely complicated steps and costing extremely high costs to artificially synthesize .

Even with the most advanced synthesis methods, the unit cost of the carbohydrates it synthesizes far exceeds that of snowflake beef.

An old farmer adds an acre of land, planting some potatoes can easily harvest a lot of carbohydrates, why bother to artificially synthesize them?

But for Zhao Changxing at this moment, even if the cost of artificial synthesis is high, he must try it.

He looked at the paper intently, and his heart gradually became clear.

"For energy, with hydrogen supplementation, the fusion reactor can fully bear it. I have a lot of water, and I also have a lot of carbon dioxide. I need 14 kinds of biological enzymes and NADH to participate in the catalysis? Let me think about it... Well, these biological enzymes are contained in corn seeds. Yes. The required equipment...it should be able to come together after some modification."

Although the seeds are precious, it is still possible to use a small amount.

After confirming that the whole process was theoretically no problem at all, Zhao Changxing cheered up.Reluctantly, he used up two more packs of nutrient solution. After replenishing his strength, he immediately started to get busy.

　There is no word limit for this book, you can write as long as you want, er, for the time being, the new book period will be 6000 words twice a day (a chapter of 2000 words is equal to three updates a day, but Rainbow is too lazy to do that).

　　If there are no accidents, there will be a chapter at 12.06 noon and a chapter at 17.06 pm.If something happens, I will ask for leave in advance

　　
　
(End of this chapter)