Citron is not only nutritious but also has high medicinal value. Taro is bitter, astringent, flat and non-toxic. It has the effects of appetizer, dehumidification, hemostasis, detoxification, moisturizing, eyesight and insecticidal effects. It can be used to cure appetite. , sores, wind blows, nocturnal emission, women's uterine bleeding, vaginal discharge, blood in the stool, acne, dysentery, enteritis, pneumonia, urethritis and other illnesses. Therefore, there is a saying that people often don't catch the disease. Astringent blood, stop bleeding Citron can dampness and heat, convergence Guse, can be used for chronic diarrhea long diarrhea, intestinal blood stasis, uterine bleeding and other diseases. Detoxification Tincton has the effect of heat-clearing, diuretic detoxification, and is a good medicine for adjuvant treatment of enteritis, dysentery and urinary system infection. With fresh alum buds, garlic, salt smashed topical, there is a good effect on the treatment of sore pain swelling. Xingnao Lishi Drink with citron leaves and water to refresh the brain and help dampen the spring storm. Antibacterial, anti-inflammatory, aphid treatment Toona sinensis has antibacterial and anti-inflammatory properties, such as the scorpion decoction that inhibits pneumococcus, typhoid bacillus, and dysentery bacillus. There are also insecticidal effects that can be used to treat tsutsugamushi disease, sores, tinea and other diseases. Tonic Toon has a strong aphrodisiac, kidney and kidney function. Beauty beauty The use of fresh squid buds to extract sap noodles can treat facial problems and moisturize the skin. It has a good effect of beauty skin care. It improves the body's immune function and moisturizes the skin. Appetizing spleen, to greasy Chamomile can boost spleen appetite and increase appetite. As early as the Tang Dynasty, camphor was included in the tribute. The emperor at that time already knew how to use the citron to remove oil. Prevention of exogenous cold Folk use citron boiled water to treat high fever and dizziness and other diseases. Treatment of hair loss Incense buds and hearts, washed and smashed, rubbed hair loss, can promote hair rejuvenation. Prevention of SARS It is said that there is also a certain preventive and therapeutic effect on "atypical pneumonia." How to eat safe taro Toona sinensis contains nitrate and nitrite, which are much higher than normal vegetables. According to statistics, the average nitrite content is more than 30 mg per kilogram and it is as high as 53.9 milligrams per kilogram in old leaves. It is easy to cause nitrite. Poisoning even induces cancer. Moreover, the protein content of Toona sinensis is higher than that of ordinary vegetables, and there is a risk of the formation of carcinogenic nitrosamines. Therefore, the consumption of Toona sinensis has potential safety hazards. So how can we eat safe and nutritious citrons? Choose fresh and tender toon buds The content of nitrite is minimal in the early stage of germination and shortly after picking. With the growth of camphor buds and accumulation during transportation, the nitrite in citron will gradually increase, and it will be harmful to human health after eating too much. Blast hot to remove nitrate and nitrite If the fragrant buds are not fresh enough, but the aroma is still there, it is a pity to throw them away. Boil in boiling water for about 1 minute to remove more than two-thirds of the nitrite and nitrate, while also can better preserve the green of the citron. Pickled sprouts take longer Many people like to eat citrons with salt for two or three days. This is a very unsafe habit. After the citron has been preserved, the nitrite content will rise rapidly and peak in three or four days. After salting, it can greatly reduce the nitrate content, thus reducing the risk of picking up the scent. However, the safest method is to marinate the scented squid for a week and eat it after the nitrite content is reduced. Serve with food rich in vitamin C Toona sinensis itself has higher vitamin C content than ordinary fruits and vegetables. If it can eat fresh toon, vitamin C can help block the formation of carcinogenic nitrosamines. Before freezing it Toon is a seasonal vegetable, and many people like to freeze it and eat it for the first time. However, the taro must be boiled before quick freezing. The data from the study showed that after 50 seconds of blanching, it was not only safer, but also vitamin C was better preserved. At the time of frozen storage for 2 months, the vitamin C content of the burned taro was equivalent to 71% of the fresh product, and only 35% of the fresh burned taro. At the same time, whether it is color or flavor, it is more ideal for hot and frozen. After the scalding, it is packed in a sealed plastic bag and placed in the freezer freezer compartment. It can be stored for more than 1 month to maintain the green and aromatic characteristics. The difference between citron and skunk Eating wild vegetables must be safe first. If you are not familiar with or do not know, try not to eat it, and it is best to buy it now. People often confuse citrons with skunks and eat skunks. Both citrons and skunks are perennial trees but not a family of genus. The former belongs to Polygonaceae and the latter belongs to the family of Bitterwood. Although the two are similar in terms of "face", there are still differences. The root of the toon is light green and the tip of the leaf is yellow-brown; the root of the skunk is dark green and the tip of the skunk is gray-green. There are sparse serrations on the edges of the toon leaves, but not on the skunk leaf. In addition, a bigger feature is that the number of leaves per citron is always even. For example, six pairs, seven pairs, eight pairs, etc. The number of leaves per skunk in the skunk is an odd number. It is always several pairs, and the upper end grows one more, forming six and a half, seven and a half, eight and a half. In addition, citrons and skunks can be identified from the odor. The citron has a special scent, and the skunk smells bizarre. According to the records of traditional Chinese medicines, skunks have “small poisons†and are only used for decoction. Although eating skunks is not a problem, it is best not to eat them. 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Lamp panel
The lamp panel is divided into ordinary infrared lamps (Dingyuan and Guanglei) and array lamps. The array camera is also divided into 1W, 2W and 3W. Therefore, when choosing infrared lamps, if it is an ordinary infrared lamp, try to choose Dingyuan and 3W array lamps. Since the appearance of infrared lamps is generally invisible, some cottage cameras are filled with Guanglei and 1W array cameras are filled with 3W array cameras. Therefore, try to choose a large brand when choosing cameras.
Maximum Aperture
The real value of the maximum aperture is to improve the light intake under low light conditions, so as to achieve the best exposure combination. In general, the ability to visualize the lens is not required for shooting landscapes. In addition, the lens caliber is not required for shooting landscapes except in particularly dark places. However, when the 70-200mm zoom lens is equipped with a 2-fold zoom lens to make the telephoto section become 400mm and AF is used for automatic focusing, it is better to choose a lens with the largest aperture of F2.8. Large aperture is conducive to accurate focusing in dark conditions. When shooting people with a large aperture lens, even in places where the light is weak, the handset can also use natural light to shoot. In addition, the lens with the largest aperture can bring fast shutter speed, so sports photography also needs a large aperture lens.
Another reason for requiring the lens aperture to be large is to be able to visualize the background freely and ensure the quality of visualization. When the aperture of the lens with the maximum aperture of F1.4 is reduced to F2, both the imaging quality and the blurring quality of the background are better than those of the lens with the maximum aperture of F2. Therefore, it is of great value to reduce the aperture of a large aperture lens by one stop. Any photographer should be good at using the lens.
focal length
The first thing to pay attention to when selecting a lens is the focal length of the lens. In fact, focal length is a matter of perspective. Different focal lengths and perspectives are different. In addition, users should be clear about what is the main purpose of buying lenses? Is it for scenery or people. As we all know, it is better to use a wide-angle lens when shooting landscapes, and a telescopic lens when shooting people. Therefore, you should first decide the focal length of the lens you want to buy according to the purpose of photography.
The best focal sections for shooting scenery are 24 mm wide angle focal section and 200 mm telescopic focal section (both are based on 35 mm specifications, the same below). When the wide-angle focus segment of the standard zoom lens evolves from 28mm to 24mm, the viewing angle becomes larger, and the range of scenery that can be stored is greatly expanded. Generally speaking, the maximum aperture of the lens is not required for shooting landscapes. If you are mainly shooting landscapes, a wide angle focal length of 24mm is basically enough when you select a zoom lens. As for the telephoto section, it must be at least 200mm. If the telephoto section is 300mm or 400mm, it is more ideal, and the degree of freedom will be greatly improved. The telephoto focus segment of traditional zoom lens is 300 mm, which is 450 mm for digital SLR. The focal length has been expanded by 1.5 times, which makes it more enjoyable to use. This is the value of digital SLR. The wide-angle focal section of the digital special ultra wide-angle lens produced is generally 12mm, equivalent to 18mm of 35mm, which is nearly 1.5 times larger than the 28mm focal section of 35mm, thus greatly widening the left and right range of the scenic scene.
The best focal length for shooting people is 85mm. In terms of 35mm standard, 85mm focal length is basically used as the standard for shooting characters. The portrait taken by the 85mm focal section is basically close to the picture effect taken by the medium frame camera. It is not only suitable for the distance, but also the face of the person looks very natural. The distance between the camera and the person being photographed can basically be kept at the normal speaking distance. The 85mm focal length can also effectively blur the background and prominent characters. In order to obtain good visualization effect, the lens with the largest aperture should be selected. The 85mm focal length is about 135mm on the digital SLR. Although the sense of distance of the shot is a little weak, it is basically OK, so the focal length of the person lens should be at least about 85mm.
A 100mm macro lens is enough for traditional SLR to shoot flowers. The 100mm macro lens can be used for equal magnification photography, which can make the flowers very large. However, when taking equal magnification photography or near equal magnification photography, due to the depth of the long focus scene, it is easy to shake, so anti shake measures should be considered when taking photos. From this point of view, 50mm macro lens is easier to use on digital SLR.