pyridine-3-methanol

The armor is the protective equipment worn by the soldiers in ancient times. Its physical properties are unique and it is related to the safety of the battle.
The texture of armor is common in leather and metal. Leather armor, taken from its flexibility. Tanned skin, with a certain elasticity and toughness, can cushion the impact of the blade. Its light weight does not hinder the agility of the soldiers. It can be moved flexibly between actions, but its protection is slightly inferior to that of metal armor.
Metal armor, mostly cast in copper, iron, etc. Bronze armor has a dignified color and was used in the early days. Its texture is relatively soft, easy to cast and shape, and can be delicately created into various nail styles. However, the copper is relatively soft, and there is a risk of depression and deformation in the face of sharp attacks. Iron armor is famous for its hardness. Iron is strong, and after forging and tempering, the armor piece can effectively resist the cutting and stabbing of swords, and the protective performance is excellent. However, the iron armor is heavy and hangs on the upper body, which consumes a lot of physical strength for soldiers. It is easy to get tired when marching for a long time.
The structure of the armor also has its physical characteristics. The armor pieces are stacked on each other and connected by ropes or nails. This structural design can not only ensure the tightness of the armor as a whole, but also give it a certain flexibility. When an external force strikes, the armor pieces can transfer and disperse force to each other to avoid excessive force at a single point. And the way of stacking the armor pieces is like a fish scale, which enhances the defense ability of the armor against attacks from different angles.
In addition, the weight distribution of the armor is also exquisite. Reasonable weight distribution allows soldiers to maintain balance when wearing, and will not affect the combat posture due to the deviation of the center of gravity when moving. The upper body armor is heavier, and the lower body is relatively light, allowing soldiers to stand firm and exert their combat power when standing, walking, and running.

Sodium amalgam is the fusion of sodium and mercury. Its chemical properties are unique and valuable for research.
Sodium amalgam has active metallic properties. Sodium is an extremely active metal. In sodium amalgam, although its activity is slightly changed due to the presence of mercury, it still retains many metal properties. When exposed to water, a chemical reaction can occur to release hydrogen. This reaction is slightly slower than the reaction of pure sodium and water. Due to the dilution of mercury, the active check point of sodium is dispersed, but the nature of the reaction remains unchanged, and both generate sodium hydroxide and hydrogen.
Sodium amalgam also has good reductivity. In many chemical reactions, it can be used as a reducing agent to reduce the elements in other substances. For example, in the field of organic synthesis, sodium amalgam can cause some compounds containing carbonyl groups to be converted into corresponding alcohols through reduction reactions. This is because the sodium in sodium amalgam is easy to lose electrons, and the electrons are transferred to the reduced substances, causing them to undergo reduction reactions.
Furthermore, the stability of sodium amalgam is better than that of sodium metal. Sodium metal is easily reacted violently with oxygen, water, etc. when exposed to air, and requires special storage methods. And sodium amalgam is wrapped in mercury, which slows down the reaction rate with external substances to a certain extent, making it relatively convenient and safe to store and use. However, it should not be negligent, and it still needs to be properly stored to avoid contact with strong oxidants, water and other substances that are prone to reactions.
Overall, the chemical properties of sodium amalgam, combined with the characteristics of active metals, strong reduction and relative stability, have important application values in many aspects of chemical research and industrial production.

In "Tiangong Kaiwu", the sun flintlock is used in many fields. The sun flintlock, an ancient fire-making tool, can focus sunlight to make fire, and has a wide range of uses.
In the field of sacrifice, the sun flintlock is of great significance. The ancients worshiped the gods and feared the sky, and the sacrificial ceremony was solemn and solemn. The fire taken by the sun flintlock was regarded as the fire of the sky, pure and sacred, and used in sacrifice. It can express pious respect for the gods and pray for blessings and auspiciousness from the gods. For example, "Zhou Li Qiuguan Si Xuan's" contains: "The palm is used to take the open flame in the sun, in order to take the bright water in the moon, and to make the bright candle and the bright water in the common sacrifice." Among them, "Fu Sui" is the sun flintel, which shows its important position in sacrificial activities.
In military affairs, the sun flintlock is also useful. In wartime, in case of fire attack or need to ignite lighting and transmit signals, the sun flintlock becomes the key thing. Marching in the field, it is difficult to keep fire, and the sun flintlock can make fire by virtue of sunlight, providing a fire source for the army and ensuring the needs of war.
In civil life, the sun flintlock is a common tool for the people to make fire every day. In ancient times, there was no convenient fire method, and the operation of the sun flintlock was relatively simple. As long as the sun was sufficient, it could make a fire for cooking, heating, lighting, etc., which greatly facilitated the lives of the people.
In the medical field, the fire of the sun flintlock also has a special purpose. The ancients believed that the sun flintlock was taken from the sky fire, which was used for moxibustion and other therapies Because the sky fire is pure, it can remove the disease and connect the meridians, which is beneficial to human health.
From this point of view, the yang flintlock plays an important role in the fields of sacrifice, military, folk life, medical treatment, etc., and is an indispensable tool for the ancient people's life, production and cultural activities.

The flintlock of Fu Yang is made of the essence of gold and tin, and it is cast as a mirror. Its shape is round, so that it faces the sun, and it bears its shadow on Ai, and fire is born. This is the way to get fire from the yang.
There is also the art of taking water from Fang Zhu. Fang Zhu, with copper, shaped like a plate, gets water from the moon. Because the moon is the essence of yin, Fang Zhu can sense yin, so he can get water.
As for the combination of yin and yang, there is also the method of using magnets to lead needles. Magnets are those who can absorb iron from stones. The needle is made of iron, and the magnet is close, so the needle should be. This is the wonderful feeling of yin and yang.
And the art of alchemy is also related to yin and yang. Take alexandrite, lead and mercury and other substances, put them in the cauldron furnace, and refine them according to the heat. Alexandrite belongs to yang, lead and mercury belong to yin, and yin and yang are combined to refine medicinal pills.
Furthermore, moxa velvet is matched with sulfur. Moxa velvet is warm in nature and sulfur is hot. The combination of the two can be used as a fire tool, and it is also used for the combination of yin and yang.
There are also things combined with saltpeter and realgar. Saltpeter is cold in nature, and realgar is warm in nature. The combination of the two has its own uses in alchemy and fire attack, and also contains the principle of harmony between yin and yang.
All kinds of methods of yin and yang harmony, or taking natural things to sense the yin and yang of heaven and earth; or refining according to heat to reconcile the yin and yang of medicines. All are the crystallization of the wisdom of the ancients and play an important role in life, medicine, military and many other aspects.

I asked, but I was inquiring about the storage conditions of armor. Armor, a protective gear, is crucial to military warfare, and its storage must also be done with caution.
First, choose the place with caution. Choose a dry place to avoid humid places. If it is humid, the armor is easy to rust. Ancient arsenals were mostly built in high-pitched and well-ventilated places, so that the armor was often in a dry place to reduce the risk of rust.
Second, comprehensive protection. The quality of the armor is either metal or leather. Metals are afraid of water and oxygen, so they should be coated with oil to protect them, and they should be separated from water and oxygen to slow their corrosion. Leathers are afraid of moisture and moth, so they must be dried frequently, and insect-proof objects can be placed next to them to prevent beetles from biting.
Third, they are displayed in an orderly manner. When storing armor, they should be arranged neatly and not stacked in a messy manner. In this way, it is convenient to use and avoid damage caused by mutual extrusion. Armors of different shapes and uses should be stored in categories. In case of war or exercises, they can be picked up quickly.
Fourth, special personnel should be on duty. A special person should be appointed to take care of the storage of armor and inspect it regularly. Check for rust, damage, or insect-eaten signs. If there is any abnormality, dispose of it in time. This person should be familiar with the characteristics of armor and know the method of storage, so as to fulfill the responsibility of protection.
In this way, the armor can be properly stored and used in wartime to ensure the safety of the soldiers and help the war go smoothly.