pyridine-2-methanol

To the two, the main use of armor is to defend against the enemy, protect the body and protect the life.
Armor, made of leather, metal, etc., is attached to the body, and can withstand the wounds of weapons, arrows and stones. Wear it on the head, and it can also protect the head from being hit. In ancient times, when battles were fought and killed, soldiers and leather intersected. Armor was for soldiers, and it was like a city or a country. It was an indispensable protective gear.
According to the records of "Tiangong Kaiwu", the production process of armor is complicated, and each has its own method. Leather armor is made of tough leather, which is tanned, cut, and braided. It is light and has a certain protective power, and is mostly used by foot soldiers. The iron armor is made of iron leaves, or connected to form armor, or forged into plate armor, which is strong in protection, but heavier, and is worn by cavalry.
On the battle formation, soldiers wear armor and armor, which can increase their courage and strengthen their behavior. When the front is mixed with dysprosium, the armor can block the enemy's blade and reduce its damage. In case of arrows flying, it can also block one or two of them, avoiding death. And the armor is neat and uniform, which also enhances the military prestige. During the march, or in case of ambush and surprise, the armor can fight for life for the soldiers, giving them the opportunity to fight back or escape.
As for generals, the armor has the effect of showing their status. The armor is often more well-made, and the decoration is more gorgeous, inlaid with beads and jade to show its honor. This is not only a protective gear, but also a symbol of majesty in the army, so that soldiers can look at it and respect it, and follow orders.
The main purpose of armor, in general, is to ensure the safety of soldiers and enhance the combat ability of the army, which plays a crucial role in ancient wars.

Yin and yang are the way of heaven and earth, the discipline of all things, the parents of change, the beginning of life and death, and the palace of the gods. Yang, moving, hot, above, outside, active, and ascending; Yin, quiet, cold, below, inside, the main static, and the main descend. There are many physical characteristics represented by yin and yang, which are briefly described as follows:
The phallus is strong and enterprising. Like the operation of the celestial body, it goes round and round, never stopping. This is the activity of the sun. All kinds of positive and enterprising things in the world have the characteristics of the sun. Its heat is like the summer sun, hot and vigorous, giving all things the ability to grow and promote the change and development of the world. And the yang master is outward, and the light is obvious, so all visible and obvious things or phenomena are mostly related to yang.
Yin has the nature of being supple and retreating. The earth is quiet, carrying all things and silent, which is the stillness of yin. In the cold winter, all things are hidden, which is the phenomenon of yin and cold. The yin master is hidden within, deep and obscure, such as the inner spirit and the functions of the viscera, which are mostly based on yin. Its main descending nature is like water flowing to a lower place, and it naturally returns.
The physical characteristics of yin and yang are opposing and interdependent. The sky is yang, the earth is yin, if there is no sky, the earth has nothing, and if there is no land, the sky has nothing. Everything in the world exists and develops in the balance of yin and yang. Day is yang, night is yin, and in a day, yin and yang alternate, and everything changes with the seasons. In the human body, the five organs belong to yin, which mainly hides essence; the six organs belong to yang, which mainly transmits. The five organs and six organs complement each other and jointly maintain the life activities of the human body. The physical characteristics of yin and yang permeate all things in the world and the world, profoundly affecting the development, change and mutual relationship of things.

Methyl ether has different chemical properties and is very interesting. Looking at its structure, two methyl groups are connected by oxygen atoms, and this unique structure gives it different properties.
Methyl ether has good flammability, and it is easy to burn when exposed to open flames and hot topics. In the air, it can form an explosive mixture. If it is induced by a fire source, it will risk violent explosion. When it burns, it emits a lot of heat, and the products are mostly carbon dioxide and water, which are relatively clean. Therefore, it has attracted more and more attention in the energy field and can be used as a new fuel.
In terms of solubility, methyl ether is slightly soluble in water, but it can be miscible with most organic solvents. This property makes it often used as a solvent in chemical production to assist in the progress of chemical reactions. Due to its good solubility to many organic substances, it can fully contact the reactants and promote the efficient occurrence of the reaction.
In terms of stability, methyl ether is still stable at room temperature and pressure. However, in case of hot topics and strong oxidants, its stability is broken, which can cause dangerous reactions. When storing and transporting, it is necessary to avoid high temperature and oxidants to ensure safety.
In terms of reactivity, the oxygen atom of methyl ether has lone pair of electrons, which allows it to participate in specific reactions. If it reacts with hydrogen halide, halogenated alkanes and alcohols can be formed. This reaction opens up a new way for organic synthesis, which can produce a variety of organic compounds and is widely used in fine chemical fields such as medicine and pesticides. Methyl ether is rich in chemical properties and has important value in many fields such as energy and chemical industry. However, due to its flammability and potential danger, it must be operated according to specifications when used to ensure safety and give full play to its effectiveness.

Mercury is a highly toxic thing, but in the art of alchemy, it is often combined with lead. There are many methods, which are described in detail below.
First, use a high-end vessel to hold lead, first set it on fire and roast it, wait for it to melt into a liquid, and slowly inject mercury, and the two will blend. During this time, the heat needs to be precisely controlled. If the fire is fierce, the mercury will easily evaporate and dissipate, and if the fire is small, it will be difficult to combine the two. Looking at its changes, if the color is gradually uniform and the texture is gradually condensing, it is almost successful.
Second, put lead and mercury in a closed pill kettle. Build a furnace with soil, put a pill kettle in the furnace, and burn a charcoal fire. The initial fire should be slowed down, so that the temperature in the kettle gradually rises, and lead and mercury can begin to penetrate each other. Then the fire is slightly stronger, which prompts the two to fully react. The alchemist needs to stay by the furnace day and night, according to the signs of the alchemy kettle, or add charcoal, or reduce the fire.
Third, take lead and mercury, and add other things, such as cinnabar, realgar, etc. First grind the cinnabar into a fine powder, and the realgar is also crushed into powder, mixed with lead and mercury. Then use a special medicine pestle, repeatedly pounding in the stone mortar, so that it can be evenly mixed. Then put it in a crucible, slowly boil it with a slow fire, and after a long time, it can be combined.
However, the technique of combining lead and mercury is very dangerous. The volatilization of mercury can easily cause poisoning, damage people's organs, and hurt people's lives. And lead is also not a good kind, and if it is used improperly, there will be endless disasters. Therefore, alchemists, if they are not well versed in this way and are cautious about it, may encounter accidents. Although the ancients refined lead and mercury in the hope of obtaining the medicine of longevity and the magic pill, they were ultimately damaged due to limited knowledge. Today's people should use scientific methods, observe the techniques of the ancients, and understand their advantages and disadvantages, rather than blindly imitate them.

When storing and transporting armor, there are many matters that must not be ignored.
When storing, the first environment is heavy. It is necessary to choose a dry place and avoid a humid place. If it is in a damp environment, the armor is prone to rust, damaging its texture and reducing its effectiveness. For example, if a good sword is placed in a wet place, the edge will be dull for a long time, and the same is true for the armor. And the storage place should be well ventilated to allow air circulation to avoid rotten gas, so as to protect the integrity of the armor.
Secondly, arrange it in an orderly manner. Do not pile it up in a messy manner. When sorted and placed, each one should be in its place according to the shape and material of the armor. In this way, when it is taken, it can be obtained quickly without panic. And neatly arranged, it is also easy to check the number and know whether it is missing.
Furthermore, it is anti-rodent and insect-proof. Rats have sharp teeth, which are easy to bite the leather part of the armor; insects like to moth, or damage the fabric of the armor. Therefore, it is necessary to set up protective measures, such as placing insect repellent drugs and setting up rat blocking facilities, so as to ensure that the armor is not damaged by insects and rats.
As for the time of transportation, it is important to be stable. The armor is heavy. If it is not fixed properly, it will be bumped and collided during transportation, which is easy to cause damage. The armor must be properly tied with ropes and other objects to make it stable. And on the road of travel, it is advisable to choose a flat road, drive slowly and steadily, and avoid the impact of urgent stops and shock absorption.
At the same time, it is well covered. Protect against sun and rain, under the hot sun, the metal part of the armor is heated and expanded, or deformed; rain is more likely to rust. When covering it tightly with felt cloth and other materials to protect its integrity. And transporters should also be careful, familiar with the preciousness and fragility of armor, and should not act recklessly.
All these things are crucial to the storage and transportation of armor, and should not be ignored, so that the armor can be kept in good condition for emergencies.