2-pentylpyridine

Those who use iron to make swords are also good materials, and their physical properties are particularly unique.
Looking at its hardness, it is extremely hard. The ancient craftsmen made swords with iron as a blade, which can be cut like mud. In the past, there was a sword, which was forged with iron. If you tried to hit him with iron, he would fold the iron immediately, and the edge of this sword was not curled or lacking, and the edge was still the same. It shows that its hardness is far higher than that of ordinary iron.
As for toughness, iron also has its advantages. Although it is hard, it is not brittle and easy to fold. After repeated tempering, the iron sword body can be twisted and broken. When the sword is swung out, it can be bent and unloaded slightly in case of obstacles, and then returned to straighten without breaking. This unusual iron material is accessible because it has both rigidity and flexibility.
The density of iron is greater than that of ordinary iron. Its texture is firm, and it feels heavy when touched by the hand. The same volume of iron and ordinary iron, the heavier iron is more. This characteristic makes the sword made of iron, held in the hand, quite heavy. When dancing, it has a steady trend, which is more powerful in actual combat.
Furthermore, the heat resistance of iron is also excellent. When forged at high temperature, the iron can withstand the heat of the fire, and it is not easy to soften and deform too quickly. The craftsman can finely temper and adjust its internal structure to make the material more dense and uniform, so as to achieve the best performance. This heat resistance provides a strong guarantee for the iron to become a good material for casting swords.
The physical properties of the iron, hard, flexible, dense and heat-resistant, all of which complement each other, making it the best choice for casting swords, and occupy an important position in the production of ancient weapons.

Borax is a mineralogical traditional Chinese medicine, the main component of which is sodium tetraborate. This material is cold, sweet and salty, and belongs to the lung and stomach meridians. The chemical properties of borax are unique and reflected in many aspects.
Borax has a certain water solubility. When placed in water, it can gradually dissolve to form a borax solution. This solution is weakly alkaline. Due to the hydrolysis reaction of borax in water, boric acid and hydroxide ions are formed, which makes the solution alkaline.
The thermal stability of borax is also an important chemical property. Under heating conditions, borax will gradually dehydrate, first lose crystal water, and then further decompose. This property allows it to be used in metallurgy, welding and other fields. For example, during welding, the substances produced by the thermal decomposition of borax can help remove oxides on the metal surface and ensure the quality of welding.
Borax can react with acids. When met with strong acids, borate ions in borax will combine with hydrogen ions in the acid to form boric acid. Boric acid is a weak acid with a certain bacteriostatic effect. This reaction principle has applications in some chemical production and pharmaceutical fields.
Borax can also react with certain metal ions to form complexes with specific colors or properties. For example, when reacted with copper ions, complexes of specific colors can be formed. This property can be used in analytical chemistry to detect the presence of certain metal ions. The chemical properties of borax are rich and diverse, which make it play an important role in many fields such as industry, medicine, and chemical industry. For example, it can enhance the thermal stability and transparency of glass in glass manufacturing, and can be used in the preparation of external disinfectants in the pharmaceutical field.

What are the main uses of the second layer? The "Heavenly Works" is used for the purpose of circulation, which is convenient for transaction. This is its primary reason.
In ancient times, it was inconvenient to communicate with goods and things. Since the second layer, civil trade has been possible. Merchants sell goods with two orders, and the buyer pays for it, and the transaction is instant. The food provided by the fields and the equipment produced by the market workshops can be obtained by the second layer.
And the second layer is also used in the second layer. When the people cultivate the land, they need to pay the government according to the price, and pay for it with two layers, which is easy to do.
Furthermore, it is also useful for the government to collect wealth. If people have money, they can hide it and use it when they need it. Compared with other materials, such as food is perishable and cloth is easy to be stored, and the value is determined.
In the flow of commerce and urban circulation, the two are used as an important medium. In the city, there are many merchants and shops, and all kinds of things are used for circulation. It is easy for people to enter the city with their own things, take two pieces, and then take two pieces. Therefore, the second issue is that the needs of the people's livelihood are indispensable, and it is very important for the community to implement.

There are many methods for synthesizing dicyanopyridine, each with its own length and its own applicable environment.
One is a chemical synthesis method. A specific organic compound is used as raw material and is achieved through a series of chemical reactions. For example, pyridine is used as the starting material, halogenated, halogen atoms are introduced, and then nucleophilic substitution reaction occurs with cyanide, and the halogen is replaced with a cyanyl group to obtain dicyanopyridine. The advantage of this method is that the reaction steps are relatively clear, and the reaction route can be precisely designed according to the structure of the desired product. However, its shortcomings are also obvious. The reaction conditions are often harsh, requiring high temperature, high pressure or specific catalysts, and there are many side reactions, and the purity of the product is sometimes difficult to achieve the ideal environment.
The second is biosynthesis. This is the synthesis of dicyanopyridine by means of the catalytic action of microorganisms or biological enzymes. Under specific culture conditions, some microorganisms can use specific substrates as raw materials to generate dicyanopyridine through metabolic pathways in the body. The biosynthesis method has the advantages of green environmental protection, mild reaction conditions, environmental friendliness, and low energy consumption. However, this method is subject to the growth characteristics of microorganisms and the catalytic specificity of enzymes, and the production efficiency is sometimes low, and the microbial culture process is easily contaminated by bacteria, which affects the quality and yield of the product.
The third is photocatalytic synthesis. In recent years, photocatalytic synthesis technology has emerged. Using light as an energy source, a specific photocatalyst absorbs photon energy to generate highly active electron-hole pairs, which in turn prompts the related reactants to chemically react to form dicyanopyridine. The reaction conditions of this method are relatively mild, and light as a clean energy source is in line with the current concept of green chemistry. However, it also faces the problem that the efficiency and stability of photocatalysts need to be improved, and large-scale industrial applications need to be further studied and improved.

One of them is to pay attention to all kinds of things before using it. Check whether there are cracks in the body, and whether the handle is firmly connected. If there are cracks in the body, it may be used to burst, and the human body will be damaged. In the past, there were craftsmen who did not use it, but used it to cause others to suffer. This is a big problem.
Second, the method of holding is necessary. Hold the end of the handle, so that the force can be released, and it can increase the performance of the fight. If the handle is in front of the handle, all the force will be exerted, and the force will be exerted. If the grip is not tight, the direction of the handle will be easily deviated, and it will be difficult to change.
Third, if you hit the handle, pay attention to your surroundings. Check that there are other people nearby, and there are obstacles. Do not ignore the people next to you because of your work. And the eyes are also fixed. If the eyes are flickering, if you do not hit the key, you may also make the mirror, and yourself.
Fourth, place it properly with the needle. Do not place it in a fixed wall, to prevent others from stepping on or colliding, and to avoid accidents. And regular protection, except for the slippery, can extend its life, so that it can always be protected.
Therefore, the second problem is small, but the method of use is appropriate. Pay attention to the general problem, so that you can get twice the result with half the effort, and ensure the safety of work.