Question 2: Is colored cotton genetically modified? Part of it is. It is made of natural colored cotton through artificial selection and transgenic cultivation.
(The wretched child is doing biology. . . )
Question 3: Transgenic colored cotton is cotton, whose transgene is it? At present, Xinjiang Natural Colored Cotton Research Institute has obtained the fibrotic seeds of three new colored cotton strains, namely red, blue and black, which are expressed in the contemporary era through transgenic and cloning techniques.
It is reported that since 2002, Xinjiang China Colored Cotton Co., Ltd., China Academy of Sciences, China Agricultural University and other scientific research units have carried out the transduction of colored cotton pigment genes in Hainan Island. Researchers have obtained several seeds with red, blue and black fiber changes in tens of thousands of transduced cotton peaches. At present, these three strains still have the problem of uneven expression of pigments and cannot be passed on to their offspring. After this problem is solved, the colored cotton strains in China will be more colorful.
Natural colored cotton is a kind of brown-green cotton cultivated by modern bioengineering techniques such as hybridization and gene transduction. Using it to spin cloth can save tedious printing and dyeing procedures, reduce the cost of raw cotton and reduce the harm of chemicals to human body. Since the 1960s, some countries have begun to cultivate colored cotton varieties. At present, there are only two basic types of colored cotton planted on a large scale in the world: brown and green. According to the different shades of color, brown cotton is divided into reddish brown, pink, brown, yellow and light yellow, and green cotton is divided into blue, light blue, light gray and beige.
Question 4: Do you know what colored cotton is? What is natural colored cotton?
Natural colored cotton is a new textile raw material cultivated by modern bioengineering technology, and its fiber has natural color when cotton is flocculed.
Why is cotton colored?
Since then, people only know that cotton is white. In fact, colored cotton has long existed in nature. The color of this kind of cotton is a biological characteristic, which is controlled by genetic genes and can be passed on to the next generation. Just as different races have black, brown and blond hair, they are all born.
What are the advantages of colored cotton compared with white cotton?
Colored cotton products are beneficial to human health; Reduce the printing and dyeing processes in the textile process; It caters to the green revolution proposed by human beings and reduces environmental pollution; It is conducive to the country to continue to maintain its position as a textile exporter and break the international green trade barrier.
Characteristics of colored cotton
Comfort: friendly to the skin, not harmful to the skin, in line with the requirements of environmental protection and human health. Anti-static: due to the high moisture regain of cotton fiber, it does not generate static electricity and does not pilling. Good sweat permeability: absorb sweat and slight sweat from human skin, make the body temperature return to normal quickly, and truly achieve the effect of ventilation and sweat absorption. After investigation, it is found that the environmental protection characteristics and natural color of colored cotton meet the taste needs of modern people. Without chemical treatment, some yarns make the colors soft, natural and elegant, and the style is mainly casual, thus infiltrating the fashion trend of the season. The image of clothing products is dignified and generous, yet relaxed and natural, while the image of home textiles is warm and comfortable, giving people a feeling of returning to nature. Why are colored cotton garments with brown and green as primary colors at present? According to experts' prediction, at the beginning of 2 1 century, brown and green will be the popular colors of clothing. It embodies the trend of ecology, nature, leisure and fashion. Colored cotton clothing except brown and green. Now there are gradually blue, purple, grayish red, brown and other colors of clothing varieties.
Why are the colors of colored cotton clothes not so bright?
There is a layer of wax on the surface of cotton fiber. In the process of printing and dyeing finishing, ordinary white cotton uses various chemicals to remove wax, and the dyes are bright in color and visual contrast, so they are bright. Colored cotton has not been treated with chemicals in the processing process, and still retains the characteristics of natural fibers, thus producing a hazy visual effect, which is not as bright as printed and dyed cloth.
Will colored cotton clothes shrink, wrinkle and fade?
Cotton-padded jacket generally has a certain degree of shrinkage and wrinkling. Ordinary cotton-padded jacket can basically avoid shrinking and wrinkling after being treated with chemicals such as resin and formaldehyde. However, Tiancai and Lang Park Jung Su series natural colored cotton garments, based on the principle of health and environmental protection, do not need chemical treatment at all, and only use physical methods in the garment finishing process, so that the shrinkage rate is less than the specified standard. If dry cleaning is adopted, wrinkles can be basically avoided. The color of colored cotton comes from natural pigments, and some pigments (green, gray and brown) will be oxidized when exposed to acid. Therefore, acid detergent can't be used to wash colored cotton clothes, and neutral soap or detergent should be chosen.
Why is the price of colored cotton clothes high now?
Colored cotton is a new type of cotton cultivated by modern breeding technology, which meets the requirements of environmental protection and green certification and belongs to high-tech products. At present, the output of the whole international market is very small and the processing cost is high.
How to distinguish the authenticity of colored cotton clothing?
The most direct method is to soak a piece of colored cotton fabric in washing powder solution at 40℃ for 6 hours (to remove the waxy layer on the fiber surface), wash it with clear water, and observe the color change after drying. If the color is darker than before, it is genuine, otherwise it is fake.
Washing method of colored cotton products
The color of colored cotton comes from natural pigments, and some pigments (such as green, gray and brown) will change when exposed to acid. Therefore, neutral soap and detergent should be used instead of acidic detergent when washing colored cotton products. At the same time, pay attention to dissolve the detergent evenly before soaking the clothes in it. Environmental protection: the color of colored cotton grows naturally, there is no need for printing and dyeing in the processing process, and there is no harmful chemical residue in the fabric, which protects the environment and is beneficial to human health.
Colored cotton knowledge
The ancestors of cotton had colorful fibers, not all of which were white. Color is the biological characteristic of cotton itself and the physiological mechanism of its fiber color. & gt
Question 5: It is true that (a) diced melon and vegetable noodles are not genetically modified products. B. At present, genetically modified foods have entered people's lives. A: Genes are small units that determine biological characteristics on DNA molecules, and top-notch vegetable noodles are not genetically modified products. A: Wrong. B.genetically modified products are harmful to human beings, and we should ban them. B. wrong. C. genetically modified products are beneficial to human beings. We should widely promote the application of genetically modified products. Useful promotion and harmful prohibition. C is wrong D. We should treat genetically modified products objectively and fairly, which has both good and bad sides for human beings. Correct. Therefore, choose: d.
Question 6: Who is suitable for 900 English sentences? Suitable for people who can't make sentences in English. For example, if you want to talk to Americans, but you don't know how to say it, you can look up 900 English sentences first and repeat them several times. When you are familiar with them, say them out loud in front of Americans, and Americans will certainly understand them. However, if Americans tell you something, they may not understand it. At this time, you have 900 English sentences and an English-Chinese dictionary, so that Americans can look for the corresponding sentences and words in the book. If there is, you will understand immediately. If not, don't worry. Let Americans write them down and study them carefully, and one day they will understand.
Question 7: The following statements about genetically modified products are correct: (a) Top colored cotton is not a genetically modified product; Genetically modified products are harmful to human beings; (a) Genes are small units on DNA molecules that determine biological characteristics, and top-grade colored cotton is not a genetically modified product, which does not meet the meaning of the question; B, genetically modified products are harmful to human beings, and we should ban them. Most genetically modified products are beneficial to human beings, so they do not meet the problem. C. Genetically modified products are beneficial and harmless to human beings, and should be widely applied. Useful promotion and harmful prohibition do not conform to the meaning of the problem; D, for genetically modified products, we should treat them objectively and fairly. It has both good and bad sides for human beings, so it conforms to the meaning of the problem.
Question 8: How did colored cotton come from? Colored cotton already exists in nature. The color of this kind of cotton is a biological characteristic, which is controlled by genetic genes and can be passed on to the next generation. Just as different races have black, brown and blond hair, they are all born.
Natural colored cotton is a new textile raw material cultivated by modern bioengineering technology, and its fiber has natural color when cotton is flocculed.
The Soviet Union first began to study colored cotton in the early 1950s, and the United States came from the army that used colored cotton in the 1960s. So far, the United States, Egypt, Argentina, India and other countries in the world mainly study and grow colored cotton, and the main colors are brown, green, red, duck egg green, blue and black. The main research method is to find living colored cotton from nature and domesticate it as a parent. At the same time, new varieties are developed by high-tech means such as transgenic technology and aerospace breeding technology. China has a long history of cotton cultivation. During the War of Resistance against Japanese Aggression period, in the revolutionary base area of northern Shaanxi, in order to break the blockade of the Japanese aggressors and reactionaries, a purple-blue wild cotton was planted. In 1970s, Henan, Anhui and other places also planted a small amount of colored cotton for research. It was in the 1990s, especially in the middle and late 1990s, that China formally researched and planted colored cotton on a large scale, which pushed the planting and application of colored cotton to the leading position in the world.