2-anilinopyridine

The foundation of the second house can be used for its purpose. "Heavenly Works" It can be used for its purpose.
This foundation of the house is first and foremost used for its purpose. Those of ancient times, in this way, need to be used. Its nature is peaceful, and it has the power of peace and harmony. Or it can be used to increase its effectiveness, or it can be used to control its deviation. In case of cold diseases, it can be used because of its nature, so that the strength can be reconciled, and the purpose of eliminating the disease. And it can help to disperse the nature, so that the force can be quickly reduced. Such as the prescription for treating the surface, adding the second foundation can make the external muscle surface, remove evil, and relieve the sweat and the surface.
Furthermore, the system of Dan is also indispensable. Danjia Dan, often used in the dyeing of the second house foundation. Because it can determine the nature of the pill, so that the pill will not lose its effectiveness due to fire and other reasons in the preparation process. And it can and the dryness of the pill, making it easy for the user to bear. The ancient alchemists, seeking the pill of life, the second house foundation is also a commonly used thing, in order to ensure the efficacy and safety of the pill.
It is also useful in dyeing. Using the second house foundation to manage the material can make the dyeing more uniform and firm. The ancient dyeing workshop knows the truth. The material is soaked in the second house foundation and then dyed, and the color is bright and not easy to fade. This is because it can make the dye change and reverse, and increase the adhesion of the dye.
In addition, in the method of creation, the second house foundation also has a wonderful use. In the mash, the amount of water added can make the wine leaven. It can make the taste of the wine more mellow and the aroma more mellow. Because it can affect the activity of microorganisms, make the leaven process perfect, and improve the quality of wine.
Of course, the use of the second house foundation involves many fields such as alchemy, alchemy, dyeing, and manufacturing, which are important for the life of the ancients.

The second one is the king's son, and its materiality is as follows:
The fruit of the king's son, at the beginning of the year, is black and purple when ripe, and its shape or shape is one to two inches. Its skin is very thin, slippery, and the outer cover is smooth. It has a bright color.
The king's son's land, at the beginning, is slightly hard, and the ripe is waxy. It is sweet in taste, slightly sweet in taste, the pulp is rich, and it contains many small seeds. The fruit is black in color, flat and thin in shape.
The fruit of the king's son is tall and straight, and the skin is gray-brown in color, and has cracks. Its branches are stretched, and the small branches are smooth. The patches are alternate, ovate-shaped, pointed at the end, base-shaped or cuneate-shaped, with cuneiform. The surface of the patina is dark and glossy, the back is slightly lighter, and the patina is pubescent.
Junzi can also grow in dry and barren places. It is cold-resistant and drought-resistant, the root system is weak, and the soil-fixing ability is low. Its habitat is good, and it can multiply in mountains and plains.

Diethylene glycol, its chemical properties are as follows:
Diethylene glycol, also known as diethylene glycol, has many properties. In terms of solubility, it can be miscible with water, ethanol, acetone and ethylene glycol, but almost insoluble in hydrocarbon solvents such as benzene, toluene, and carbon tetrachloride. This property is of great significance in many chemical processes. For example, in the preparation of some preparations that require heterogeneous mixing, its good water solubility allows it to be fully integrated with aqueous components, while its insolubility to hydrocarbon solvents allows it to play a unique role in specific systems and avoid interference caused by miscibility with hydrocarbons.
In terms of chemical stability, diethylene glycol is relatively stable. However, under specific conditions, such as high temperature, strong acid or strong alkali environment, it will react. Under strong acidic conditions, the ether bond in the diethylene glycol molecule can be broken to form products such as ethylene glycol; in alkaline environments, although relatively stable, but long-term in concentrated alkali and high temperature conditions, ether bond partial fracture will also occur. This balance of stability and reactivity is widely used in the field of organic synthesis. In the preparation of some fine chemicals, its stability is used as a reaction solvent, and at the same time, under suitable conditions, it prompts a specific reaction to form the target product.
Diethylene glycol also has a certain esterification ability. The hydroxyl groups in its molecules can be esterified with acids to generate corresponding ester compounds. This property is widely used in the preparation of plasticizers, fragrances and other fields. For example, by reacting with phthalic anhydride, diethylene phthalate can be obtained. This ester is often used as a plasticizer to improve the flexibility and processability of plastic products.
In addition, diethylene glycol has weak reductivity. Under specific oxidation conditions, its hydroxyl groups can be oxidized to form oxidation products such as aldehyde groups and even carboxyl groups. However, this reduction is weak and usually requires specific strong oxidizing agents and suitable reaction conditions to achieve.

There are many methods for synthesizing 2-naphthol groups, each with its own advantages. The following is described in detail by Jun.
First, using naphthalene as the starting material, 2-naphthol groups can be obtained by sulfonation and alkali melting methods. First, the naphthalene is co-heated with concentrated sulfuric acid to generate naphthalene sulfonic acid. In this reaction, it is necessary to pay attention to the reaction temperature and the concentration of sulfuric acid. If the temperature is too high or the sulfuric acid is too concentrated, it is easy to cause the formation of polysulfonated products. After obtaining naphthalene sulfonic acid, it is co-melted with sodium hydroxide and carried out alkali melting reaction to obtain 2-naphthol sodium. After acidification, 2-naphthol can be This method has a long history and mature process. The raw material naphthalene has a wide range of sources and low cost. However, the reaction steps are slightly complicated, and the sulfonation process will produce a large amount of waste acid, which has a certain impact on the environment.
Second, the oxidation method of naphthalene is adopted. With a specific oxidant, such as air, oxygen, etc., under the action of a catalyst, the oxidation reaction of naphthalene can generate 2-naphthol-based related products. In this process, the choice of catalyst is the key, and metal oxide catalysts are commonly used. This method is green and environmentally friendly, with high atomic utilization rate, but the reaction conditions are more demanding, the equipment requirements are also high, and the catalyst cost is not low, which limits its large-scale application. < Br >
Third, it is prepared by hydrolysis of halogenated naphthalenes. The halogenated naphthalenes are first halogenated to obtain halogenated naphthalenes, and then hydrolyzed under alkaline conditions. During hydrolysis, factors such as the type, concentration of bases and reaction temperature will affect the reaction results. This method is relatively simple to operate and has high product purity. However, the halogenation reaction may produce a variety of isomers, which is difficult to separate, and the halogenation process uses halogenating agents, which may bring environmental problems.
Fourth, the use of Fu-G reaction. Using naphthalene with acyl halide or acid anhydride as raw materials, under the action of Lewis acid catalyst, a Fu-Gram acylation reaction occurs to generate 2-naphthalenyl groups, which can be converted into 2-naphthol groups through subsequent reactions such as reduction. This method has good reaction selectivity and can introduce specific substituents. However, the catalyst is sensitive to water, the reaction needs to be carried out under anhydrous conditions, the operation requirements are relatively high, and the price of raw materials acyl halide or acid anhydride is relatively high.

The first one is the quality of the material and the quality of the bow. If you choose the right one, if there is a bend or a fragile one, you can use it. The density of the ground should also be reduced, and the density should be appropriate, so that the power of the bow can be uniform, and the direction should be reduced. And the collection of the right season, so that the quality of the bow can be determined, so that it will not be affected by the passage of time.
The second time, the work of the work must be improved. Shearing and finishing, the end should be leveled, the surface should be smooth, and the burr should be made. The bending is easy, the force should be soft, and it should not be done urgently, so as not to break. The method of fixing is also a good way to study, and the glue or sticky objects used will definitely be able to firmly bind the bow, so that it will not be damaged.
Furthermore, when using the bow, it is appropriate to reduce the speed. The direction and strength of the arrow are all affected. When encountering a big problem, the posture and strength of the bow should be adjusted. And the efficiency of use is also high. The degree of use is also low. It is easy to make the body tired and reduce its life. Every time you use it, it should be properly stored and placed in the place where the dryness is passed, to avoid the tide and the beetle, so that the bow can always be used.
And there is, compared to other bows. However, compared with bamboo, wood, and gold bows, the strength of the bow is not enough. Therefore, when using the bow, it is appropriate to know its shortcoming. In the face of distance and resistance, you should not rely on it too much. Balance the pros and cons, and make more suitable weapons, so as to make good use of the two bows.