2-Thiazolecarbonitrile

In "Tiangong Kaiwu", it is recorded that arsenic (that is, arsenic stone is refined), its main uses are as follows:
One is used in medicine. In ancient times, although arsenic is highly toxic, it can be used for the treatment of some difficult diseases after special processing and compatibility. Doctors believe that it has a certain effect on certain sores, swelling, cold phlegm, asthma and other diseases. For example, in some ancient medical prescriptions, arsenic will be used cautiously as medicine to fight poison with poison, and use its toxicity to fight diseases and evil in the body.
The second is used for agricultural pest control. Arsenic can be sprinkled around farmland due to its toxicity, and has a repelling and killing effect on some pests that harm crops. Ancient agricultural technology is relatively limited. Arsenic can protect crops from pests and ensure grain harvest to a certain extent.
Third, it is used in industrial metallurgy. Arsenic can play a role in the smelting process of certain metals. In the smelting of some non-ferrous metals, arsenic can be used as an additive to help remove impurities in ores, make metal refining more pure, and improve the quality and performance of metals.
However, it should be noted that arsenic is extremely toxic, and it needs to be treated with caution whether it is used in medicine or other purposes. In medicine, if the dosage is not properly controlled, it is very easy to cause poisoning and even death; in agriculture and industrial use, if it is not properly disposed of, it may also cause pollution to the environment, water sources, etc., endangering the safety of humans and animals. Its use has always been accompanied by great risks, and in modern times, these uses of arsenic have been gradually replaced by safer and more effective alternatives.

Mercury sand, that is, cinnabar, has special physical properties.
Mercury sand is red in color, bright and eye-catching, often in the color of vermilion, radiant, among all minerals, the color is unique, like the radiance of the red sun condensed, quite magnificent. Its texture is delicate, and its tentacles are warm and moist. Although it is a ore, it does not feel rough and stinging. It is like a carefully carved beautiful jade, delicate and smooth.
The specific gravity of mercury sand is quite large, and it feels heavy when placed in the hand. It is heavier than ordinary stone and soil, which is one of its remarkable physical characteristics. And its hardness is moderate. Although it is not as indestructible as gold and stone, it is not easily damaged. It is scratched with ordinary utensils and is not easy to leave marks.
In addition, mercury sand has a good luster. Under the light, it shines brightly, and the light flows brightly. It is as if it contains brilliance and wants to break through the stone, exuding a unique charm.
In addition, after the mercury sand is heated, it will have wonderful changes and can precipitate mercury liquid, which adds a bit of mystery to it. In many alchemy and other alchemy techniques, the ancients often used this property of mercury sand to explore the mystery of life and the transformation of matter. The unique physical properties of mercury sand made it highly valued in ancient times. It was used in many fields such as alchemy, medicinal use, and decoration. It was one of the important substances for the ancients to explore the world and pursue longevity.

Caramel is a sugar made from glutinous rice and other grains through fermentation and saccharification. Its chemical properties are relatively stable.
View the structure of caramel, its main components contain disaccharides such as maltose. Maltose is formed by connecting two molecules of glucose through α-1,4-glycosidic bonds. This structure gives caramel a certain stability. From a chemical point of view, the chemical bonds in its molecules are relatively strong, and under normal environmental conditions such as temperature and humidity, it is not easy to undergo violent chemical changes on its own, such as decomposition and oxidation. < Br >
In a normal temperature environment, without the influence of external special factors, such as strong acids, strong bases, high temperatures or specific enzymes, caramel can maintain a relatively stable state. And it has a certain degree of hygroscopicity. Although this hygroscopicity will change it in a humid environment, it is not an essential chemical structure change, but only a slight change in physical properties, such as softening and stickiness.
And because of the chemical structure of caramel, its glycosidic bonds are difficult to break under normal conditions, so it is not easy to quickly decompose into other substances. Therefore, in general, the chemical properties of caramel are quite stable, and it can maintain its inherent chemical properties in common storage and use environments, providing a stable material basis for dietary and medicinal applications.

In "Tiangong Kaiwu", the method of making caramel (that is, sugar) is to take glutinous rice and barley malt together.
First cook the glutinous rice into a rice and cool it to a suitable temperature. The barley must be soaked first, waiting for it to germinate, and then crushed for later use.
Mix the cold glutinous rice with the crushed malt, put it into a kettle, add an appropriate amount of water, and mix well. Then, boil it slowly over warm heat, stirring it from time to time to ensure that it is heated evenly.
After cooking for a long time, the mixture of rice and malt gradually melts into a pulp. The pulp needs to be filtered through a fine cloth to remove its dross and retain the liquid.
The clear liquid is then put into the kettle, and it is tortured on a hot fire to cause the water to evaporate. When boiling, pay close attention to the change of heat and liquid. When it thickens, depending on its viscosity and color, stop fire in time.
The caramel at this time is amber, thick and sticky, sweet and delicious. It can be eaten directly, and is also often used for cooking seasoning, or for medicinal purposes, such as moisturizing the lungs and relieving coughs.
This method has been passed down for a long time. It is a classic process for traditional caramel production. According to this step, delicious caramel can be obtained.

In today's world, in the market, the price of sheep is often affected by the price, supply and demand. However, if you want to study the price of mutton, you need to think of many parties and make them all the same.
Generally speaking, the price of meat, depending on its parts and products, is between 20 and 50 and 60 texts per catty. If the market is prosperous and the market is abundant, it can be obtained for 20 or 60 texts per catty. In case of epidemic, or good days, the demand will increase greatly, and the price will rise, and the 50 or 60 texts per catty will not be known.
As for mutton, its nature is good, and the people are happy. However, the price of sheep varies slightly depending on the region and season. Its price per catty is between thirty and forty and seventy and eighty. Outside the Great Wall, where the water and grass are flourishing, and the sheep are more prolific, or slightly cheaper, thirty or forty yuan per catty can also be obtained; in the place, especially if the transportation is inconvenient, the cost is added, or the value order, if everyone wants to eat mutton in winter to avoid the cold, the price often rises to seventy or eighty yuan per catty.
However, these are all roughly different, and the things in different places are different, and the market is also instantaneous. The business is good, and the supply and demand are all about the price of mutton. Therefore, if you want to know how to cut it, you need to observe the situation of the city in the place.