5-Fluoropyridine-2-carbonitrile

Alkane is composed of hydrocarbons and hydrocarbons, and its properties are peaceful. A is the beginning of alkane, and its chemical properties are quite characteristic. It is described in ancient sayings today.
The state of A is gas at room temperature and pressure, with no color or taste, lighter in weight than air, and difficult to dissolve in water. This state is easy to collect, and can be taken by draining air according to its lighter nature; and because it is insoluble in water, it can also be obtained by draining water.
The combustion of A, the flame is light blue, this is the appearance of oxidation, and the products are water and carbon dioxide. It burns violently and releases a lot of energy, which can be a source of heat in the world. The equation for burning is: $CH_ {4} + 2O_ {2}\ stackrel {ignite }{=\!=\!=} CO_ {2} + 2H_ {2} O $.
The reaction of A has a substitution change. Under light, A meets the halogen group, and the halogen atom gradually replaces the hydrogen atom in A. If A and chlorine, light acts as a medium, chlorine A gradually emerges, and the product is not one, there are monochloromethane, dichloromethane, trichloromethane and even carbon tetrachloride. Among them, chloromethane is a gas, and the rest is a liquid. Taking methane and chlorine as an example, the reaction is: $CH_ {4} + Cl_ {2}\ stackrel {light }{=\!=\! =} CH_ {3} Cl + HCl $, and the subsequent reactions follow in sequence.
Although A is a simple alkane, it plays an important role in the chemical industry. It is not only a fuel, energy supply to the world, but also a raw material, which can make all kinds of chemicals. Although its properties are flat, it is in the field of chemistry and has an extraordinary role. It is the foundation of later chemical industry and cannot be ignored.

Millet is one of the five grains, and its use is quite extensive.
At the end of the diet, it can be cooked as a meal, and its taste is unique and sticky. "The Book of Rites · Neizhe" contains "Drink: heavy Li clear the bad, millet Li clear the bad, and sorghum Li clear the bad". It can be seen that the rice wine made by millet is also one of the drinks of the ancients. And in the ritual of sacrifice, millet status is respected. "The Analects of Confucius · Weizi" says that "killing chickens is for millet and eating them". With millet as a guest, it shows that it is also an important choice in terms of food hospitality.
In agricultural production, millet has the characteristics of drought tolerance and strong adaptability, and can be planted in a variety of soil environments. When ancient agricultural technology was not yet developed, it was an important crop to ensure food output. Its planting history is long, and the Book of Songs mentions many places, such as "He Mili, He Mili's Seedlings", which depicts the growth of millet, reflecting the widespread planting of millet at that time.
At the cultural level, millet carries profound cultural meanings. "The sadness of Mili" is the emotion of the rise and fall of the family and the country, the prosperity of the past and the decline of the present. In the poem "Mili", Doctor Zhou saw that the palace of the ancestral temple of the old capital was all rice seedlings, so he felt this sorrow. Millet is also included in poetry, enriching literary images. Such as "an old friend has chicken millet, invite me to the Tian family", treat the farmer with chicken millet, and send sincere friendship to friends.
To sum up, millet played an important role in the diet, agriculture and culture of the ancients, and was an indispensable part of ancient society.

Millet is one of the five grains, which is very important for people's livelihood. The method of its synthesis can also be traced in ancient times.
The first is related to the choice of land. It is necessary to choose fertile soil, whose soil should be fertile and moist, and the qi should be smooth. As the "Qi Min Yaoshu" says: "If you want to get a good field, you don't need to leave the ruins." In the fertile field, millet can plant its roots, raise its seedlings, and grow smoothly.
The next time is the time of sowing. When the sky must be smooth, it should be in accordance with the solar terms. Spring is beginning to bloom, and the ground temperature is gradually rising, which is a good time for sowing. " The Book of Rites and Lunar Orders states: "In the month of mid-spring,... it is the moon that chooses the Yuan Chen, and the Son of Heaven personally carries the scorpion, and... ploughs the imperial book." Although this is said that the Son of Heaven ploughs himself, it also shows that the sowing should follow the principle of the time, and the sowing of millet is the same way.
Furthermore, the matter of irrigation. Water is the source of all things, and the growth of millet is indispensable. When there is a drought, water must be diverted to irrigate it, so that the soil is moist and the seedlings are seedlings. However, the water cannot be overused. If the water accumulates into waterlogging, the roots of millet will rot. The ancient farmers often observed the celestial phenomena, observed the soil conditions, and irrigated it in time, so that the millet could benefit from water and avoid the harm of water.
The The Book of Victory records the method of fertilization, which can help the seedlings flourish with dung soil. Fertilization is applied at the right time, so that the stems of the millet are strong and the ears are solid, and there is hope for a bumper harvest.
Field management cannot be ignored. Weed and weed are removed to prevent it from competing with the millet for fertilizer and glory. Diseases and insect pests must also be prevented. Although there were no pesticides of today in ancient times, the use of grass, wood ash, lime and other substances can also drive away pests and diseases in the field and protect the safety of the millet.
Wait for the millet to mature and harvest at the right time. Look at the color and grain quality of its ears, and when it is ripe and harvested, you can get high-quality millet. After drying, threshing and other processes, millet is a usable grain.
In the synthesis of millet, the ancients took experience as the basis, and did their best to make it a treasure of five grains and a guarantee for people's life. The wisdom of this can be learned from sincerity.

Millet, the people's livelihood depends on, and there are many people who should pay attention to the way of storage and transportation.
At the beginning of storage, the first heavy millet is dry. If the millet contains too much moisture, it is easy to cause mildew and rot when stored. Therefore, after harvesting the millet, it must be exposed to dry, so that the moisture can be reduced to a suitable degree, so that it can be stored for a long time without damage. "Qi Min Yao Shu" has a saying: "When it is dry and curved, it is extremely dry." The same is true of millet. The drying of exposure is the foundation of storage.
The choice of storage is related to the safety of millet. It is advisable to choose a high dry place with good ventilation. If it is in a humid place, the moisture is dense, and the millet is easily invaded. Furthermore, the storeroom must be protected from rats and insects. Rats and insects can damage the millet. The ancients often sprinkled ash around the warehouse or set up bait to prevent the damage of rats and insects.
As for transportation, protection during transportation is particularly important. The equipment for transporting millet should be solid and not leak. If it is transported by boat, it should be prevented from leaking and soaking; if it is carried by car, it must also be covered with a cloth to protect it from rain and moisture. In case of hot summer on the way, you should pay more attention to the state of millet, lest it change due to heat.
The timing of transportation is also exquisite. It is advisable to avoid the rainy season, when the road is muddy, and the rain is easy to cause millet to get wet. If it is necessary to do it, it needs careful protection. If it is a cold winter, although there is no danger of rain and dampness, beware of freezing the millet. In the winter in the north, the quality of millet may be damaged due to freezing.
Those who escort must be cautious. Check the condition of millet from time to time. If there is any abnormality, dispose of it immediately. Do not be negligent and cause damage to millet. All these are those who should pay attention to millet in storage and transportation, and they are related to people's livelihood.

Jinfu oats are the so-called good grain in the world, but if you eat too much, it will hold back gas and hurt the spleen. And flaxseed, which is also a well-known food, has a great impact on the environment and human health.
As far as the environment is concerned, the planting of flaxseed requires not very thick soil force, and it can grow in arid land, so it is not as excessive as other crops. Therefore, it is beneficial to maintain soil and water and maintain ecological balance. And when flaxseed plants grow, they can absorb carbon dioxide, help slow down the greenhouse effect, and silently contribute to the improvement of the environment.
As for personal health, flaxseed is rich in unsaturated fatty acids, such as alpha-linolenic acid, which can be converted into EPA and DHA, which can clear blood lipids, make blood flow smoothly, and reduce cardiovascular diseases. It also contains lignans, which have antioxidant properties, can resist free radical damage to human cells, delay the aging process, and help prevent cancer. In addition, flaxseed is rich in dietary fiber, which can promote intestinal peristalsis, increase digestion, prevent constipation, maintain the balance of intestinal flora, and make people healthy and less sick.
Of course, everything is appropriate. Although flaxseed is beneficial, it should not be eaten in excess. If you eat too much, it may cause gastrointestinal discomfort, such as bloating, diarrhea, etc. Therefore, when you take it in moderation according to your personal constitution, you can get its benefits and avoid its harm, which is beneficial to the environment and adds luster to your health.