pyridine-4-carboxamide

The chemical structure of a bell brain is quite mysterious. This is a rare substance in the world, which is bred between heaven and earth and creation, and has a unique structure.
Looking at its outer layer, it is interwoven by carbon and hydrogen elements into a chain-like foundation, which is like an ancient chain lock, interlocking and very stable. Carbon, the organic foundation of all things, uses its unique tetravalent to attract hydrogen and oxygen to build this wonderful shape. Hydrogen is like a flexible feather, attached to the periphery of the carbon chain, light and lively.
In-depth exploration, there is a delicate ring at the core of the nail boll brain. The atoms in the ring are arranged in an orderly manner and are connected to each other by chemical bonds. It is like a star in the sky, each in its place, but echoing each other. The existence of this ring endows the nail boll brain with many special properties.
And there are many branch chains on the ring, such as divergent extension, each with its own work. Branched chains may contain oxygen groups, and those with oxygen are active, which can often lead to changes in chemical reactions, adding different energy to the nail boll brain. Or there are nitrogen groups mixed in them, and nitrogen atoms, with their lone pairs of electrons, change the distribution of the electron cloud of the nail boll brain, thereby affecting its chemical activity and physical characteristics.
The chemical structure of the nail bell brain can not be achieved overnight, but has been carved over time and tempered by nature. The delicacy of its structure amazes future generations of researchers. In the fields of medicine and chemical industry, there are infinite possibilities. It is waiting for the world to use wisdom and patience to dig carefully and uncover more mysteries.

Alum, alum, yellow alum, green alum, etc., its functions are quite complex. "Tiangong Kaiwu" has many records of alum, and today in ancient Chinese, its main functions are as follows:
First, used for dyeing. Alum is widely used in dyeing workshops and can be used as a mordant. When the fabric is dyed, it is treated with an alum solution, which can make the dye better combine with the fabric, and the color is firmer and brighter. If it is dyed blue or crimson, the color of alum is not easy to fade, and it lasts for a long time. It is indispensable in the textile dyeing industry.
Second, used in medicine. "Compendium of Materia Medica" and many other medical books record the medicinal use of alum. It is sour and cold in nature, and has the effects of detoxification and insecticide, dryness and dampness to relieve itching, hemostasis and diarrhea, and expectoration and opening and closing. External use can treat scabies, eczema itching, and ulceration of sores; internal use can treat blood vomiting, diarrhea, and mania. However, alum stone is poisonous, and internal use should be cautious. Follow the doctor's advice.
Third, it is used to purify water. In turbid water, an appropriate amount of alum stone is thrown into it. After stirring, alum stone is hydrolyzed to produce an aluminum hydroxide colloid, which can absorb suspended impurities in water and make the water clear. It is often used in civilian and military fields to obtain water.
Fourth, it is used for alchemy. In ancient alchemy, alum stone is one of the important raw materials. Daoists believe that through special refining methods, alum stone can react with other gold stone medicines, refine into medicinal pills, and take them to seek immortality. Although this concept is unrealistic in today's view, alum stone played an important role in alchemy activities at that time.
Fifth, it is used in food processing. When making some pasta or pickled foods, alum stone can be used as a leavening agent or preservative. For example, frying fritters, adding alum stone and baking soda, the reaction of the two produces carbon dioxide gas, which makes the fritters expand and soften; when pickling food, adding an appropriate amount can prevent corrosion and keep it fresh, prolonging the shelf life of the food.

Lead and mercury are commonly used in alchemy, and their physical properties are unique. Lead is heavy and soft, silver-gray in color, and has good ductility. It is stable at room temperature, and easy to melt when heated. When it melts, it flows softly like a liquid, just like the agility of water. And lead is left in the air for a long time, gradually rusting, protecting its body and slowing its alteration.
Mercury is the only metal that is liquid at room temperature, its color is like silver, and it shines brightly. Its fluidity is excellent, it is round to the touch, dripping on objects, rolling freely, like mercury cascading into the ground, and it is pervasive. The boiling point of mercury is low, and it is easy to turn into mercury vapor when heated. This gas is colorless, invisible, toxic, and cannot be ignored.
The two are combined in alchemy, and the nature of lead and mercury restricts and transforms each other. The thickness and stability of lead can make mercury smart and easy to disperse. In the pill furnace, calcined by heat, lead and mercury undergo many wonderful changes. Or they blend and coexist, or they undergo chemical changes to form new substances.
However, both lead and mercury contain toxicity. Although they play an extraordinary role in alchemy, they should not be careless. If eaten by mistake or exposed for a long time, lead poison can easily accumulate in the body, damage people's internal organs, cause poor qi and blood, fatigue, and even mental damage. The same is true for mercury poison, which hurts the brain and internal organs, making people tremble and lose their minds. Although the ancients sought the wonders of longevity in alchemy, their awareness of the toxicity of lead and mercury gradually deepened, warning future generations to use it with caution.

Fuyang flintlock takes fire in the sun, and Fang Zhu takes water in the moon, all because of the way of nature, so it can be used. As for the synthesis of Yang Dan, there are also many methods.
One is based on gold and stone. Choose the genus of lead and mercury, which is black and heavy in color, and mercury, which is white and spiritual. First put the lead in a crucible, calcine it with charcoal fire, melt it into a liquid, and then slowly add mercury, and the two are fused, just like yin and yang. However, in this process, the heat is very important. If the fire is fierce, the mercury is easy to evaporate, and if the fire is small, the two are difficult to combine. It needs to be calcined by the fire of civil and military affairs, and it needs to be calcined in turn. Observe the change of its color and luster. When its color is golden, like the brilliance of autumn sun, it will be the first to form.
Second, borrow the spirit of grass and trees. Select Ganoderma lucidum, ginseng and other spiritual herbs, and mix their juices with the combination of the above-mentioned golden stones. Ganoderma lucidum, get the spiritual energy of mountains and rivers, ginseng, and gather the essence of heaven and earth. Pound the juice, pour it into the gold and stone mixture, and seal it in a porcelain jar. Buried in a shady place, about three feet deep, and take it out after seven, seven, forty-nine days. At this time, the mixture absorbs the spirit of grass and trees, and its nature is more gentle and its medicinal power is more mellow.
Third, according to the order of Spring qi rises, summer qi is prosperous, autumn qi is restrained, and winter gas is stored. Synthesis of Yangdan is suitable for starting in spring and conforming to the trend of yang qi growth. In the early morning of every day, at sunrise, the mixture is placed outdoors to undertake the light of morning dew and early sun. In autumn, all things converge. At this time, Yangdan has gradually taken shape. It needs to be moved to a secret room and nourished with gentle fire, so that its qi is introverted and its medicinal power is condensed. In this way, according to the order of the heavens and the times, the way of going with nature, Yangdan is completed.
The synthesis of Yangdan requires both the benefits of mining gold stones and plants, adapting to the changes of the times, and using exquisite methods and rigorous states to obtain this magical thing.

If you want to store and transport mercury, you should be careful. Mercury is highly toxic, and it is harmful to touch and smell. When storing and transporting, it should be sealed first. It needs to be stored in a special container, which is tight and seamless to prevent it from escaping. And the place where it is placed should be a cool, dry and well-ventilated place to avoid heat and moisture, so as to avoid mercury damage and leakage due to changes in temperature and humidity.
When handling, be sure to be gentle and avoid violent vibrations and collisions. Mercury is soft and easy to flow, and if you are not careful, it will spill over. If so, it is extremely difficult to clean up, and the poison is dispersed, endangering the surroundings. Porters must wear protective equipment, such as gloves, masks, protective clothing, etc., to protect themselves in case.
In addition, in the place of storage and transportation, obvious warning signs should be set up to inform people of the risk of mercury, and they should not be approached or touched. And there are special personnel in charge, record the entry and exit in detail, operate according to the rules, and every change can be traced back.
Furthermore, use Bibijie for related utensils to avoid residual mercury. If mercury is sprinkled, quickly cover it with sulfur powder, synthesize it into non-toxic mercury sulfide, and then properly clean it up.
In short, the storage and transportation of mercury is related to life and the environment. All details cannot be ignored. Only by being cautious and following the rules can we ensure safety.