Lead: Self-testing disease symptoms from the hair color is a very important self-test method. If some people have very popular and even hot physical constitution, his hair will have mixed yellow or reddish hair. However, if the hair suddenly turns white, or if the teenager has a white hair early, pay attention to whether the kidney is guilty of diarrhea or has symptoms of anemia. Grey hair
To extract a mixture of DNA fragments, put through a PCR instrument to do a simple purification. Remove the free fluorescent ddNTP single nucleotide, leaving a DNA fragment of a certain length, which can be sequenced on the machine. A polyacrylamide solution is first injected into a hollow capillary during the sequencing process. Then, the polyacrylamide solution was ionized by UV light irradiation to generate a polymerization reaction. The polyacrylamide gel produces a separation effect under the electric field to start the electrophoresis of nucleotide. The electrophoretic movement of short DNA fragments is fast, and the electrophoretic movement of long DNA fragments is slow. The mixture of DNA fragments moves from a negative charge to a positive charge under the action of an electric field in a capillary containing a polyacrylamide gel. The positive end of the capillary is irradiated with a solid-state laser, and a spectroscopic optical sensor records the different fluorescence intensities. Each DNA fragment, when passing through the laser scanning point, has a fluorescent group on it, which will emit a specific fluorescent color.
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Look from hair color
Human hair has many colors, such as black, white, red, yellow, gray, brown, etc., and can also dye hair into a variety of colors through hair coloring. Most of the yellow and black species have black hair, while Caucasians have more colors. Each person's living environment and health condition are different. His hair quality will also be different. Hair quality can reflect his living conditions. It can be said that we can see whether a person is in good health and can easily be seen from the color of his hair.
Yellow brown or light yellow
Hypothyroidism; Highly malnutrition; Severe iron-deficiency anemia and major illnesses, etc., leading to the reduction of melanin in the body, the basic material of black hair, the dark hair gradually turned yellow-brown or pale yellow.
Under normal circumstances, white hair will grow after age 40. This is because with the increase of age, the essence of the kidneys gradually attenuates and the blood of the liver is insufficient. This is a natural phenomenon and does not require treatment.
If the hair suddenly becomes white for a period of time, it is mostly caused by turbulence in the body. At this time, the white hair can turn black again when it is treated for the cause. Young adults and even youngsters are known as “less whiteheads.†Acquired whiteheads cause many causes: malnutrition, such as lack of protein, vitamins, etc., as well as anxiety and tension will make the hair white. In addition, thyroid dysfunction can also cause gray hair.
Yellow hair
Hypothyroidism; Highly malnutrition; Severe iron-deficiency anemia and major illnesses, etc., leading to the reduction of melanin in the body, the basic material of black hair, the dark hair gradually turned yellow-brown or pale yellow. In addition, suffering from a disease can also cause the hair color to turn yellow. If you have systemic scleroderma, your hair will not only turn yellow but will also fall off in large numbers when systemic lupus erythematosus develops.
Pediatric hair sparse yellow due to the development of congenital deficiency, can also be accompanied by sitting, standing, walking, talking, teeth and other "five late" phenomenon. Teenage yellow hair may be due to calcium deficiency. The lack of calcium in adolescence is mainly manifested as night sweats, that is, sweating during sleep; hair is less, dull, and is yellowish; at night, calves (gastric muscles) cramps when sleeping. In addition, frequent perms, shampoo with alkaline water or washing powder can also cause yellow hair damage.
Because in the previous polymerization reaction process, the starting point of the polymerization reaction starts from a specific primer position. Therefore, the DNA fragment that reaches the laser scanning point of electrophoresis first is the shorter fragment, so its polymerization termination position will be closer to the polymerization start position. Therefore, the fluorescent color reflects which of the bases at its 3' end is A, T, C, and G.
Conversely, the slower the electrophoresis of DNA fragments reaches the laser scanning point, the longer the DNA fragments. As a result, its termination site is farther away from the starting position of the primer. Finally, a map of four colors is obtained.
The disease symptoms are known from the hair color