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Primary school students' fourth grade scientific papers
The word "cloning" must be familiar to everyone. Cloning is a single translation of the word "Clone" in English, which means asexual cloning, that is, a group that can be inherited continuously through asexual reproduction (such as mitosis), and is often used to describe cloning at the cell level. Cloning refers to the technical operation of obtaining the target gene or cell from numerous genes or cell groups through asexual reproduction and selection. For example, gene cloning refers to the separation process of a target gene. Usually, the genetic material of biological materials, such as DNA, is cut into fragments by enzymes, inserted into vectors, amplified by asexual reproduction (proliferation of bacteria or cells), and then the target gene is selected and caught with some kind of probe. Cell cloning technology is the most widely used technology of B lymphocyte hybridoma in the preparation of monoclonal antibodies. Immortal myeloma cells are fused with some antibody-producing cells and inoculated on porous plates or soft agar, and the colony characteristics of the produced cells are different. Hybridoma cell lines producing target antibody can be screened by using specific labeled antigens. But we don't like this word.

I think "cloning" technology is a very serious violation of human rights (from an objective perspective). Who in this world wants to have another person who looks like himself? What a lovely cloned sheep this is, but as we all know, the ewe used to clone Dolly is 6 years old, so is Dolly's physiological age accumulated from 6 years old, or from 0 years old like a newborn sheep? 1On May 27th, 999, a research team composed of British PPL Medical Company and Roslin Institute, which bred Dolly sheep, announced that Dolly's chromosome telomere length was shorter than that of ordinary sheep of the same age. This means that Dolly may age and die faster than ordinary sheep, indicating the limitations of existing cloning technology. Look at the next news: On April 6th, many international media reported an important news: severino Antinori, an Italian gynecologist who caused widespread controversy, announced at the academic conference on cloning and genetic engineering held in Abu Dhabi, United Arab Emirates on May 5th that he was carrying out a human cloning project, in which 5,000 couples participated, and one woman was eight weeks pregnant. If the report is true, this woman will be pregnant with the first cloned human embryo successfully implanted in human history. If she successfully gives birth to a baby in the womb, the baby will be the first human clone in human history. As early as 200 1 1 year, Antinori and zavos announced at a meeting held in Lexington, Kentucky, USA that they would jointly try to clone human beings to help infertile couples obtain offspring. Antinori said at that time that he would not conduct human cloning experiments in Europe, because Europe was "frightened by the fear of human cloning" and his location would probably be in a certain country in the Gulf.

After the announcement of Antinori's plan, there was a great debate about human cloning around the world. Because human cloning will lead to many complicated ethical and technical problems, many countries with advanced biotechnology in the world have legislated against human cloning. Facing Antinori who wants to be the "father of human cloning", the media in various countries can't help exclaiming: Wolf is coming! Italian doctor Antinori announced last Friday (April 5) that an infertile woman had been pregnant for eight weeks through embryo reproduction technology, and said that the world's first cloned baby would become the son of a wealthy Arab businessman.

It is very irresponsible to rashly embark on the road of human cloning when the congenital deficiency is very serious. In fact, it is a question whether the cloned baby can survive. I hope the best result is stillbirth! "

I hope to invent a machine that can dissolve garbage in the future. When garbage piles up, it will launch corresponding dissolving bombs according to the quantity and types of garbage, and the garbage will slowly dissolve and finally penetrate into the ground. This garbage melter can also suck some iron elements in garbage into your body to create energy for yourself.

The appearance of this machine is similar to that of the present mini BP machine. There is also a launch tube in front of its body, which can be carried around. If you find garbage at work and study, just aim at it and press it gently, and the garbage will disappear without a trace. There is also a large model of this machine, which is specially used to deal with piles of garbage in the garbage dump.

May this garbage dissolver come into our life as soon as possible and create a clean and beautiful environment for us. I believe that in the near future, I will use my wisdom to make this wish come true!

Note: this machine will never dissolve non-garbage items, please rest assured!

Nowadays, the number of cars has greatly increased, and many black gases can often be seen from the rear of cars, which not only pollutes the atmosphere, but also harms human health. I think: if only I could invent a good quality car without oil!

The sun is the largest energy reservoir on our planet. The technology of concentrating solar energy can be used for heating, cooking and bathing. Solar energy has the advantages of convenience, economy and no pollution. So it's the perfect energy source for cars! The appearance of this car is very special, a bit like the fuselage of a radio. There is a beautiful silicon plate at the top to absorb solar energy. At present, there is an energy converter in the position of the automobile fuel tank, which can convert the absorbed solar energy into electric energy and store it for listening to music, turning on air conditioning, lighting and other automobile internal facilities.

This is the car I want to invent-solar car. Do you like it?

I hope to invent a machine that can make small hair disappear without a trace after a haircut-hair suction machine.

When you just cut your hair, there will be a lot of small hair between your head and your clothes. Shampoo is inconvenient and can't be washed off. To use the hair sucker I invented, you only need to suck it a few times where you feel itchy.

This kind of wool suction machine is similar to a dust suction machine in structure. Small and convenient, only need to install the 5th battery to use. There is a small box at its tail. This small box is used to hold small hair that has been sucked in. When you have finished smoking, take out the small box and dump the little hair inside.

This is the wool sucker I want to invent. Do you like it?

This is the automatic bed with temperature control that I want to invent. This kind of bed is warm in winter and cool in summer, which makes people's life more comfortable and reduces a lot of trouble for their mother. Our current bed has many shortcomings, such as the hot weather in summer, and my mother has to take off the thick mat and put it on the mat in the sun. It's cold in winter, so my mother should put away the mat and spread a thick mat and quilt.

I want to invent a temperature-controlled automatic bed, which people can make automatically adjust the temperature with the change of climate. In summer, when the outside temperature is high, as long as you turn on the switch of the bedside, the bed will automatically control the temperature to about 20 degrees, and people will feel particularly cool when sleeping on it. When the temperature outside is very low in winter, you can automatically control the temperature at around 25 degrees by turning on the switch on the bedside. Sleeping on it can make you feel the warmth of spring in the cold winter. Students, do you like it?

Facing the increasingly serious problem of garbage pollution, I hope to invent a method of automatically sorting and digesting garbage one by one in the future-automatically digesting garbage bins. When people put their used and discarded domestic garbage into this dustbin, the dustbin will treat the plastic like rice grains and compress the waste paper into biscuit-like paper cakes; Glass products are concentrated and melted into liquid, and domestic garbage such as vegetable leaves is fermented into fertilizer. Cleaning workers only need to sort and package the garbage digested in barrels every day, and then sell it to manufacturers who need these fertilizers for reuse.

The shape of this garbage bin is similar to the existing shell box, made of recycled plastic and glass, and its base has a microcomputer, which is responsible for sorting the garbage that people put in.

This is the automatic digestion trash can I want to invent. I hope it can bring us a clean and beautiful environment!

I want to invent a multifunctional spacesuit. You can fly directly from the earth to outer space by wearing it. This spacesuit is made of a special plastic with high temperature and pressure resistance, which can absorb natural gas and convert it into energy.

The structure of this spacesuit is as follows: there are two small rockets on the back, which are the power devices of the whole spacesuit, allowing human beings to roam in the vast universe. There is a triangular helmet on the spacesuit, which can reduce the resistance in flight. The waist of the spacesuit has a steering wheel with a small rocket. It is difficult to walk on the planets in space, because some planets (such as the moon) have no gravity and easily fall into this infinite space-the universe. The sole of the spacesuit I invented has four suction cups, which can firmly absorb the contact surface of the sole and let human beings set foot on the planet in space. There are also tool racks, orientation indicators, radio pagers and plasma guns on the clothes.

This is my spacesuit. Do you like it?

In the past, people often used "smoke filled" and "fire everywhere" to describe the battlefield, because chemical propellant or propellant can burn and push the projectile to high speed. There will be no smoke in future wars. At that time, we used electric cannons and some new weapons, and hardly used chemical energy.

I have always hoped to invent an ultra-new electric cannon to defend the sacred territory of the motherland. This kind of electric gun is a launching device that uses electromagnetic force to push the projectile to reach ultra-high speed. It can accelerate the projectile to 3-5 kilometers per second, which is beyond the reach of conventional artillery. As an ultra-high-speed kinetic energy weapon, its projectile has long range, deep armor penetration and small firing advance, so its hit rate is particularly high. It is very difficult to fire projectiles with a mass greater than 100 kg with artillery, but electric cannons can not only fire small projectiles with a mass of grams, but also launch projectiles or spacecraft with a mass of tons, and advance to a speed of several kilometers to dozens of kilometers per second. It has high speed and great kinetic energy, and can be used in tanks, ships or planes. The electric gun works by electromagnetic force or electricity, and it can operate normally only by the power of the power device. Its cost is only 1% of that of ordinary guns, and its efficiency is very high. The electric gun accurately controls the firing rate and changes the range by changing the current, so it has excellent performance, stable operation and good controllability. In addition, because there is no smoke, fire and shock wave when launching, the electric gun has good concealment and is very suitable for future modern wars. Electric guns can be used as weapons for theater missile defense and national missile defense, as well as as as ground-to-air directional launch rockets and pure payloads, and can also be used for orbit transfer of space-based propulsion spacecraft. The use of stun guns can be great!

How's it going? This is the electric cannon I want to invent. Very impressive.

I hope to invent a multifunctional wallpaper in the future. You can change color according to your personal preference, and there is still time to show it. The most amazing thing is that as long as people have a "wallpaper remote control", they can turn the wallpaper into a super-large screen TV and surround speakers at will, or into a variety of different styles of scenery. When you are lying on the beach by the Hawaiian sea; When you sit on the sofa, it's like sitting on the top of Huangshan Mountain. But the most satisfying thing is its temperature control function, which can keep the temperature you want at home and keep spring at home forever!

This kind of wallpaper looks nothing special, but in fact, the interior is extremely complicated, the instruments are precise, the energy is completely obtained from carbon dioxide, and fresh air is spit out.

This is the wallpaper I want to invent. You'll love it!

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