n-(1,1-dimethylethyl)-2-benzothiazolesulfenamide

In "Tiangong Kaiwu", all clocks are made of bronze for the high, and iron for the lower. The method of casting bells, among which the "casting method" is used to cast small bells, and the "group furnace confluence method" is used to cast large bells. And the expressions you mentioned "1,1-dimethyl ethyl" are not the vocabulary of the era in which "Tiangong Kaiwu" is located. This is the modern chemical nomenclature.
The casting of bells was related to sacrifices, time telling and many other important things in ancient times. Its main uses are: First, the use of sacrifices. In solemn sacrificial ceremonies, the sound of bells is melodious, which can create a sacred atmosphere, communicate with the gods of heaven and earth, and convey people's reverence and prayers for the ancestors of the gods. As the "Zhou Rites" says: "Nine summers are played with bells and drums." In major ceremonial occasions such as sacrifices, bells are indispensable ritual instruments. Second, the need to tell the time. In cities, temples and other places, bells are sounded on time to tell the time, which is convenient for people to arrange daily activities such as work and daily life. Monastery bells and drums in the morning and evening inform the monks and believers that time flows and lives in an orderly manner. Third, the meaning of warning. In case of emergencies such as war and disasters, bells are sounded to warn everyone, arouse attention, and prompt everyone to respond in time. If a city encounters foreign enemy invasion, alarm bells are sounded to alert the military and civilians.
The casting process of bells is complicated, which is related to the selection of materials, casting methods, etc. The use of bells is also deeply integrated into the life and culture of the ancients, and is of great significance in social order and spiritual

This question is to inquire about the chemical properties of dimethyl silicone oil. Dimethyl silicone oil is an organosilicon compound composed of silicon atoms and methyl groups connected by silicon-oxygen bonds.
Dimethyl silicone oil has many unique chemical properties. First, it has high chemical stability. It is inert to many chemical reagents, such as acids, bases, oxidizing agents, reducing agents, etc., and it is difficult to react significantly with it. Therefore, it can maintain its own stability in different chemical environments and can be used in many scenarios that require strict chemical stability.
Second, it has good thermal stability. Its physical and chemical properties can be maintained stable over a wide temperature range. At high temperatures, decomposition, oxidation and other reactions do not occur easily; at low temperatures, it does not solidify or become viscous, and can function as usual. This property makes it widely used in high and low temperature environments.
Third, low surface tension. This property makes it easy to spread on the surface of objects to form a uniform film, which can be used as an excellent release agent, defoamer, etc. Because it can effectively reduce the surface tension of liquids, prevent the formation of foams or promote the bursting of formed foams.
Fourth, excellent electrical insulation. Dimethyl silicone oil has stable dielectric constant and dielectric loss factor, and high insulation resistance. It is widely used in the field of electronics and electrical appliances, such as potting materials, insulating coatings, etc., which can ensure the stable operation of electrical equipment. < Br >
Fifth, strong hydrophobicity. Due to the presence of methyl groups in its molecular structure, its surface energy is low, the contact angle with water is large, and it has good hydrophobicity. Therefore, it can be used for waterproof treatment, such as waterproof processing of fabrics, paper, etc.

In the tin ingot casting process recorded in "Tiangong Kaiwu", there are indeed many things that need to be paid attention to.
The first thing to pay attention to is the selection of raw materials. To cast a good tin ingot, it is necessary to select pure tin ore as the source. If there are many impurities, it will affect the quality of the tin ingot, causing its purity to not meet the standard, and there may be various problems in subsequent applications. Therefore, the material selection must be careful, and the texture and composition of the ore must be carefully checked, so as to ensure the quality of the tin ingot at the source.
The second is the control of the furnace temperature. The melting point of tin is relatively low, but if the tin liquid is uniform and pure, the temperature is very important. If the fire is small, the tin is difficult to completely melt, or there is a lump of unmelted material; if the fire is large, When smelting, craftsmen must rely on experience and vision, always pay attention to changes in the heat, and adjust in a timely manner to ensure that the tin liquid is in the best melting state.
Furthermore, the casting equipment cannot be ignored. The furnace, casting mold, etc. used must be intact, clean and pollution-free. If there are cracks in the furnace, it is easy to cause heat loss, which affects the melting efficiency and the quality of the tin liquid; the casting mold is not clean, and the surface of the tin ingot may be defective and uneven. Therefore, before and after each use, the utensils should be carefully checked and cleaned to ensure their good condition.
The pouring process also requires skill. The pouring speed and height of the tin liquid will affect the forming of the tin ingot. If the speed is too fast, it may cause the tin liquid to splash, wasting materials and easily hurting people; if the speed is too slow, the tin liquid may solidify in advance, causing the ingot body to be incomplete. The pouring height should also be moderate. If it is too high, the impact force will be large, so that the tin liquid will be unevenly distributed in the mold; if it is too low, the filling will be insufficient.
The cooling link is also critical. After the tin ingot is poured, the cooling speed should be uniform and moderate. If it is cooled too fast, the ingot body may be stressed internally, causing it to break easily; if it is cooled too slowly, the production efficiency will be reduced, and oxidation may occur due to long-term exposure to air. It is necessary to choose the appropriate cooling method and environment according to the actual situation to ensure the

What is the market price of 1- (1,1-dimethylethyl) - 2-naphthalene-anthracene? This is related to rare compounds with special chemical structures. The price of such compounds is influenced by many factors due to their potential uses in scientific research, medicine and even materials.
The first to bear the brunt, the difficulty of preparation is the key factor. The synthesis of 1- (1,1-dimethylethyl) - 2-naphthalene-anthracene requires exquisite organic synthesis skills. Its complex molecular structure requires multiple steps of reaction, and each step requires precise control of reaction conditions, such as temperature, pH, and the ratio of reactants. If there is a slight difference, the yield will be low or the product will be impure. Such a difficult preparation process will undoubtedly greatly increase the production cost, which in turn will push up the market price.
Furthermore, purity is also crucial. In scientific research and high-end application scenarios, the purity of compounds is strictly required. To achieve high purity, fine separation and purification steps are required, such as column chromatography, recrystallization, etc. These operations are not only time-consuming and labor-intensive, but also require a lot of high-purity solvents and professional equipment. The cost will rise, and the price will also rise.
In addition, the market supply and demand relationship also affects the price. If this compound emerges in emerging fields, such as the development of new anti-cancer drugs or the preparation of high-performance electronic materials, the demand will surge, and the supply will not be able to keep up quickly due to preparation difficulties, and the price will soar. On the contrary, if the demand is low, the price may be relatively stable.
However, due to the lack of specific market data, it is difficult to accurately state its market price. However, considering the above factors, it can be inferred that the market price of 1- (1,1-dimethethyl) -2-naphthalene-anthracene compounds should be in a higher range due to difficult preparation, complex purification, and perhaps unique uses, and non-ordinary compounds are comparable.

The agent of nitrate yellow, among all kinds of drugs, has its own unique advantages. The agent of nitrate yellow, with its fierce medicinal power, can promote the effect of Chen Zhixin.
First, the power of laxative and laxative is outstanding. Compared with other drugs, nitrate yellow can go directly into the large intestine, quickly cleanse the stagnation, and make the dross come out quickly. If the intestines accumulate heat, dry feces and internal knots, all kinds of Tongli drugs fail to quickly solve the urgency. A dose of nitrate yellow can often make the occluded intestines reopen. The advantage of this speed is unmatched by other drugs.
Second, the power of clearing away heat and purging fire is very good. When the body is full of heat and poison, it is filled with three burners, and other medicines clear the heat, or slow down or fail to reach the sick place. Nitrate yellow can use its downward power to induce heat to descend, so that the evil of heat comes out with the stool, so as to relieve the suffering of heat and poison burnt burning, just like drawing money from the bottom. The wonder of this heat clearing is beyond the reach of many medicines.
Third, the ability to reduce swelling and disperse knots is also apparent. If the sore is swollen and poisonous, when it first starts, the qi and blood are stagnant, and the power of other medicines to dissipate is not caught. If nitrate yellow is used externally, it can use its diarrhea to make the poison evil have a way out, reduce the swelling knot inside, and make the existing sepsis collapse quickly, and promote its early recovery. This is the unique effect of nitrate yellow.
However, although the agent of nitrate yellow has many advantages, it should not be used indiscriminately. Because of its strong medicinal power, it is easy to damage the righteousness, so people with physical weakness, pregnant women, etc., should use it with caution. The way to use medicine is to weigh the pros and cons, make good use of the advantages of nitrate yellow, and avoid its harm, so that the medicine can be used to its fullest extent and the patient will be safe.