Award-winning junior high school science and technology paper 1000 words
In addition to formaldehyde's most effective method
Activated carbon in addition to formaldehyde is a cheap and practical method, which is characterized by physical adsorption and thorough adsorption, and it is not easy to cause secondary pollution. Physical function of deodorizing and detoxifying activated carbon; Does not contain any chemical additives, and has no influence on human body.
In addition to formaldehyde's most effective method
As we all know, formaldehyde is very harmful to human body. But how should we remove formaldehyde? To help you learn more about in addition to formaldehyde's methods, we will briefly analyze various in addition to formaldehyde methods as follows:
Activated carbon adsorption
Activated carbon in addition to formaldehyde is a cheap and practical method, which is characterized by physical adsorption and thorough adsorption, and it is not easy to cause secondary pollution. Physical function of deodorizing and detoxifying activated carbon; Does not contain any chemical additives, and has no influence on human body.
Tuzhao
300 grams of black tea is soaked in two basins of hot tea, put it indoors, and open the window for ventilation. Within 48 hours, the indoor formaldehyde content decreased by more than 90%, and the pungent smell was basically eliminated.
Nanotechnology absorption decomposition method
The method after decoration is to use products with powerful functions of capturing, adsorbing and eliminating formaldehyde. High-tech nano-and nano-modification technologies are adopted, and after multiple screening and activation modification, several natural nano-materials are combined with conventional oxidants, which can effectively remove harmful gases such as formaldehyde, ammonia, benzene and carbon monoxide in the living environment. Not only for formaldehyde, but also for ammonia, benzene, TOVC and other harmful substances. This method can be used to put a moderately over-standard in 30 square meters.
Ventilation in addition to formaldehyde
Through the circulation of indoor air, the content of harmful substances in indoor air can be reduced, thus reducing the harm of such substances to human body. People often close doors and windows in winter, so the indoor and outdoor air can't circulate. Not only the content of formaldehyde in indoor air will increase, but also radon gas will accumulate continuously, even reaching a very high concentration.
Plant decontamination can be selected for low-level pollution in plant deodorization method: generally, indoor environmental pollution is mild to moderate, and the pollution value is less than 3 times of the national standard, and plant purification can achieve good results. Choose and place plants according to different functions and areas of the room. Generally speaking, it is more appropriate to put two pots of plants with a height of 10 square meter in a room with a height of10 meter. (Recommended indoor pollution control method: ventilation+activated carbon+in addition to formaldehyde plants, suitable for medium and low pollution. )
What are the products besides formaldehyde?
Pay attention to the following points to prevent the harm of formaldehyde:
1, pay attention to indoor formaldehyde detection and purification. According to the degree of formaldehyde pollution in indoor air, please ask experts from indoor environmental monitoring center to provide effective treatment schemes, especially for families with old people, children and allergies.
2. Wardrobes made of wood-based panels must be used with caution. Try not to put underwear, pajamas and children's clothes in it.
3. Taking some effective purification measures indoors and in furniture can reduce the harmful gases released by furniture, such as activated carbon or indoor purifier.
At the same time, you can choose professional purification products to prevent the harm of formaldehyde:
1, a powerful formaldehyde scavenger, can remove formaldehyde pollution in decorative boards and has strong adsorption capacity.
2. Formaldehyde scavenger (furniture type) is used for painted furniture, which can remove formaldehyde from furniture without damaging the surface of furniture.
3. The rapid detection tube for benzene, ammonia and radon is a professional in addition to formaldehyde product first developed by Shanghai Wei Baosheng. Consumers can detect indoor pollution scientifically and accurately by themselves only for tens of yuan.
Award-winning junior high school scientific papers 1000 words 2
The color of butterfly wings
? Spread the wings of butterflies, shine in beautiful flowers, and flowers fly in the hearts of beautiful girls? Sitar tan sang casually like this, and no one would think there was anything wrong: the flowers came from butterflies, and butterflies fluttered by.
This seems to be the standard of people's beautiful eyes and comfortable hearts. No matter how sad we are, we will think of butterfly lovers who died for love. Hundreds of years of legends have spread to this day, affecting all the arts that may enter our lives, such as music and drama. No one has explored whether those colorful wings are our imagination or dazzling illusion. Butterflies should be colorful, which is as iron as a microscope to observe subtle differences. However, what happens when a butterfly's wings meet a cold microscope? The result is that the original colorful butterfly wings have lost their colors under the microscope, showing a wonderful uneven structure. It turns out that the wings of butterflies are colorless, and only because of their special microstructure will they show colorful colors under the irradiation of light. This is not a plot bridge of dog blood, nor is it a whimsical science fiction crossing. No matter how disappointed you are, this is an unchangeable reality. Apricot yellow banner fluttering in the wind on the water margin? Doing justice for heaven? Four Chinese characters often make Jianghu heroes excited. Shangliangshan? 、? Is Liangshan a moral kindling? It has become a slogan for aspiring, ambitious and skilled practitioners to encourage each other, and it has also become the refuge object of Erlong Mountain, Shaohua Mountain and other hills. They think they can be brave and just. One knife, one shot, one wife's shadow? .
It was only in Liangshan that I discovered that the ideal was full and the reality was very skinny. In addition to drinking in a big bowl and eating large pieces of meat, all they can do is to work hard in the direction of wooing under the guidance of Song Jiang. So? Tao? It's just that Song Jiang took refuge in the imperial court, which is colorful in broad daylight. The truth is always so confusing as countless historical clouds. Only when the tide recedes can we see who is swimming naked. Just like some officials confidently talk about anti-corruption on the stage all day, the aggressive parallelism sentence shows the meaning of anti-corruption, and the bitter tone shows that it is at odds with corruption. As a result, just after the best decission report, several officials of the Commission for Discipline Inspection were waiting at the door to invite him. Tea? . Who can say that their speech is not gorgeous butterfly wings? Who can draw an equal sign between imprisoned officials and those who give orders on the stage? Who would have thought that their behavior was just colorful colors in the light?
The problem is that not everyone has a microscope, and few people can get rid of all the light interference used for camouflage and expose what they see under the microscope. What's more, the more carefully disguised, the more inflammatory and deceptive, because no butterfly is willing to fade and become an annoying moth.
Therefore, if you can't have a pair of discerning eyes, you must strive to develop a discerning heart, not credulous, not blindly obedient and not radical. To see the original appearance of a mountain, we should not only climb to the top, but also wait patiently and calmly until the cold winter. At that time, the vegetation will fall, the color will fade, and the true face of the mountain will appear.
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