3-Pyridinecarbonitrile, 2-hydroxy-

Mercury is a highly toxic substance with a cunning and changeable nature. The metal sodium amalgam of mercury also has unique chemical properties.
Amalgam is an alloy of mercury and other metals. In sodium amalgam, sodium atoms are dispersed in the crystal lattice of mercury, and the two interact to make their chemical properties different from pure sodium and pure mercury.
Sodium amalgam is highly reducible and slightly slower than pure sodium. When exposed to water, sodium in sodium amalgam reacts with water to form sodium hydroxide and hydrogen gas. Due to the presence of mercury, this reaction is not as violent as the reaction between pure sodium and water, but it can still be observed.
Sodium amalgam has a wide range of uses in the field of organic synthesis. It can be used as a reducing agent to reduce carbonyl-containing compounds, such as aldol and ketone, to alcohols. It can provide active hydrogen atoms in some reactions to promote the reaction.
In industrial production and laboratory operations, sodium amalgam should be used with caution. Because of its mercury content, mercury is volatile, and mercury vapor is highly toxic, causing damage to the human nervous system, kidneys and other organs. Therefore, when using it, it should be operated in a well-ventilated environment and protective measures should be taken.
Sodium amalgam has strong reducing properties and has important uses in organic synthesis and other fields. However, due to the mercury content, it is necessary to pay full attention to safety issues when using it to ensure that personnel safety and the environment are not polluted.

The use of alum in the world is quite extensive. Common use is the first to purify water. The ancient method of purifying water, alum can make the turbid matter in the water settle, make the water clear, and for people's livelihood to drink. In the past, in the well of the city, every time the water was muddy, alum was often taken and cast. In a short time, the water would be clear. This is one of the great functions of alum in purifying water.
Furthermore, in the business of printing and dyeing, alum is also indispensable. If a dyer wants to make the fabric bright and durable, he must use alum as a mordant. After treating the fabric with alum, the dye can better adhere to it, and the dyed color is gorgeous and lasting. The ancient brocade embroidery is colorful, and alum is indispensable.
In the art of papermaking, alum also has its use. After the pulp is made, alum can make the paper denser and enhance its water resistance. In this way, the paper made is not easy to apply ink, and it is suitable for writing and painting. The masterpieces of calligraphy and painting of scholars can be preserved for a long time, and alum also has a help.
In the field of medicine, alum can also play a role. When used externally, it can be used as an astringent agent. For some skin sores, eczema and other diseases, it has the effect of dryness and itching. Ancient healers often used alum as medicine to heal many patients.
In addition, in the tanning industry, alum can be used for tanning leather. The leather tanned by alum is tougher and more durable, and the leather goods made can be used for a long time.
All these things show that alum has common and important uses in various industries, and it is indeed a useful thing in the world.

The method of controlling its armor is especially delicate and complicated.
In the past, if you want to make armor, the first material should be selected. The material of armor is related to the effect of protection, so you can't be careless. Its materials are mostly taken from tough leather, fine iron, etc. Leather needs to be specially tanned to make it tough without losing flexibility, and can resist the invasion of arrows. Fine iron needs to be tempered to remove impurities and increase its hardness and toughness.
As for the production method, first cut the leather into a fit shape to make the lining of the armor. This is the "inner armor". The cutting of the inner armor needs to be measured according to the body shape, and it must fit, so that it can move freely. After that, the nail piece is carefully crafted with iron pieces. The size and shape of the nail piece can be customized, either square or round, and it has been carefully considered. When creating the nail piece, the craftsman needs to rely on his superb skills to beat it repeatedly with a hammer to make the nail piece thin and uniform, and with sufficient strength.
Then, connect the nail piece with a leather rope or an iron chain. The leather rope needs to be made of high-quality cowhide and treated with oil to prevent decay. The iron chain should be interlocked and tight. The method of connecting the nail pieces is extremely critical, not only to ensure the relative flexibility between the nail pieces, but also not to make the gap too large, so as not to lose protection.
Armor made of armor. The outer armor piece can resist the attack of sharp blades, and the inner leather cushions the power of arrows, and it is comfortable to wear. The edge of the armor is often wrapped in cloth to prevent scratching the skin. The helmet part is also cast in fine iron, and the top is decorated with lasagna, which not only enhances the appearance but also has the effect of marking. The front of the helmet may have a protective face to protect the vital points of the face. Such a carefully crafted armor is a good weapon to protect the warrior in front of the battle.

I look at your question, but I am inquiring about the price range of Poria in the market. Poria is a commonly used Chinese herbal medicine, and its price in the market varies depending on factors such as quality, origin, and season.
In terms of quality, the superior ones have solid texture, sufficient powder, and no impurities. These Poria prices are high; those with inferior quality contain more impurities and poor powder properties, and the price is low.
The origin is also the key. For example, Poria produced in Yunnan, Anhui, and other places, due to the suitable water and soil in the region, the quality is quite good, and the regular price is also high.
The impact of the season cannot be ignored. When new products are launched, the supply increases, and the price may drop slightly; when the supply is short, the price rises.
Roughly speaking, the price per kilogram of ordinary Poria cocos may be between 20 and 30 yuan to 50 or 60 yuan; if it is a high-quality Poria cocos, it can reach more than 100 yuan per kilogram. However, the market conditions are fickle, and this is only an approximate number. The actual price shall be subject to the market at that time. If you want to know the exact price, you can go to the medicinal material market, pharmacy, or ask people in the industry to get the exact number.

I look at what you are asking about, but it is related to the storage of millet by Linjun. In the past, Linjun led the Pap family to feed on millet during the migration, and its storage of millet was quite meaningful.
Linjun stored millet, the first place to choose. Choose a dry place to prevent mildew of millet. If the cover is wet, the millet is perishable, so you must find a high and dry place, dig a cellar and hide it. The depth of the cellar is also exquisite, and the depth is constant temperature, which can resist the invasion of cold and summer.
Secondly, the storage of millet is also the key. At that time, pottery urns, bamboo barns and the like may be used. The pottery urn is solid, which can block moisture; the bamboo urn is ventilated, which can keep the millet dry. And before filling the millet, it must be roasted with a fire, and its moisture must be removed, so that the millet can be contained in it.
In addition, Linjun stores millet, and also pays attention to insect prevention. Or spread wormwood, calamus, etc. on the bottom of the cellar, its fragrance can drive insects away. Or mix a little lime in the millet, although the amount is small, but the insect control effect is quite good.
The storage of millet in Linjun is a collection of the wisdom of all people, and it has been tested over time. At that time, millet was the foundation of all food, so it was stored in a way that could ensure everyone's food and clothing, so that when their tribe migrated and conquered, they could have food to rely on, and eventually achieve a great cause. The method of storing millet, although it has passed through the years, can also be a lesson for the future world.