2 Iodo 5 Fluorobenzaldehyde

"Tiangong Kaiwu" has a saying: "All mussels are pregnant beads, which have no quality but are raw. Those who are small in size and live in aquariums devour many people, and their longevity will not last forever. The mussels are wrapped in armor, which can be cast without gaps, that is, swallowing the abdomen, and the whole body cannot be digested. Therefore, they are unique for hundreds of years and thousands of years, and they have become priceless treasures."
5 - Ocean beads are pearls produced in the West, and their main uses have many aspects. First, in the field of decoration, ocean beads are lustrous, dazzling, and extremely precious, and are often used to make all kinds of luxurious jewelry. Princes, nobles, and dignitaries flocked to them, and inlaid the ocean beads on the crown to show the respect of status; adorned between the clothes, adding to the ornate clothing. Wearing foreign pearl jewelry, the pearl light swayed while walking, showing a graceful and luxurious state.
Second, in diplomacy and trade, foreign pearls are important exchange items. Because of their rarity, they have become a hard currency in international trade. Envoys from various countries often give foreign pearls as valuable gifts to show friendship and attention, carrying the heavy responsibility of diplomatic exchanges. At the same time, on the commercial road of East-West trade, foreign pearl trade brings huge profits to merchants and promotes the prosperity of trade.
Third, in the religious and cultural level, foreign pearls have special significance. In some religious ceremonies or celebrations, foreign pearls are often used to decorate gods, magic tools, etc., giving them a sense of sacred and solemn, symbolizing beauty and auspiciousness, and condensing people's beliefs and spiritual sustenance. Its unique luster and precious characteristics are in line with the pursuit of sacred things by religions, adding a mysterious and solemn atmosphere to religious activities.

"Tiangong Kaiwu" says: "All mercury is the liquid of Dan sand, and it obtains mercury, and its color is still red, so it is called mercury." 5-10 mercury and methylmercury are actually the category of mercury. Its physical properties are as follows:
First of all, its color state, under room temperature, 5-10 mercury and methylmercury are in a silver-white liquid state, with a dazzling luster, like flowing silver, agile and wonderful, which is amazing to see.
Second of all, its density, the density of this substance is quite large, and it is more than several times heavier than ordinary liquids. If it is filled with utensils and feels heavy, it can be known that its density is different from that of ordinary objects.
In addition to its fluidity, 5-mercury methylmercury has excellent fluidity, like a boneless thing, it flows when poured, slippery without leaving hands, and can freely change forms in containers of various shapes, just like smart water, but it is a little more dignified than water.
In addition, its melting point and boiling point, the melting point is very low, and it can be maintained in a liquid state at room temperature; however, the boiling point is quite high, and in order to boil it into a gaseous state, it needs to be added at high temperature.
In addition, 5-mercury methylmercury has good electrical conductivity and may be useful in circuit conduction. And its surface tension is large, if dropped on a flat place, it can be aggregated into a round bead shape, which is not easy to disperse.
In summary, 5-mercury methylmercury has potential uses in various fields due to its unique physical properties, but it also has certain toxicity. When using it, it should be handled with caution to ensure safety.

"Tiangong Kaiwu" says: "Where there is lead (that is, zinc), there is no such thing in ancient books. It is a famous color established in modern times. Its quality is refined from calamine. Calamine is named because it is like a stone and has bronze stars."
If you want to get lead, first take calamine. Calamine is prolific in the deep mountains, yellow and white in color, hard and brittle. After harvest, smash it into small pieces.
Make a furnace in the ground, use coal cakes to pad the bottom of the furnace, place calamine blocks on it, and open a hole next to the furnace to pass air. The top of the furnace is covered with mud, leaving only a small hole for observation of the heat.
When ignited, coal burns, and the firepower is hot. Calamine is heated, and the zinc oxygen contained in it reacts with the carbon. Zinc oxygen is reduced by the carbon, and the zinc gas escapes.
When the heat is sufficient, collect the obtained lead at the bottom of the furnace. Lead is as white as silver and brittle.
However, this process needs to be controlled by the heat. If the fire is small, the zinc will not be fully released, and if the fire is large, the zinc gas will evaporate. And the operation must be well ventilated to prevent zinc gas poisoning.
There are also other methods, using zinc ore as raw material, through beneficiation, roasting and other processes, the zinc ore is converted into a reducible form, and then reduced with charcoal or other reducing agents at high temperature, and lead can also be obtained. However, these methods were more difficult to operate in ancient times, and the process requirements were quite high.
In short, the chemical synthesis of lead is more common. Although the process requires fine operation, this metal is widely used in various processes.

When storing and transporting water cobra snakes, pay attention to all things to keep them safe.
The storage place must be a cool and dry place. Water cobra snakes like shade and dampness, but if they are too wet, they are prone to disease. If they are too dry, they need a moderate place. And the storage place is quiet, so do not disturb the noise. Because of its timidity, it is easy to be disturbed and disturbed, or hurt its body, or damage its spirit.
The storage device is also exquisite. Do not use a narrow and small device, and leave enough space so that the snake can swim and stretch freely. The wall of the device should be smooth to prevent the snake from scratching. And some aquatic plants can be placed in the container to simulate its native environment, so that the snake can feel a little at ease.
As for transportation, the first thing is to ensure its safety. Handling must be gentle and not rough. Because the snake's body is soft and brittle, it may be injured if it is not careful. Pay attention to changes in temperature and humidity on the way. You can prepare a damp cloth to adjust the humidity and a mat to reduce the temperature. In case of hot sun, cover it with a curtain to avoid direct exposure; if it rains, prevent rainwater from pouring into the storage vessel.
In addition, transporters should also be cautious. You need to be familiar with the habits of the water pentacle shen snake and do not touch it rashly to prevent being bitten by it. And the state of the snake should be checked regularly on the way, and if there is any abnormality, it should be dealt with in time.
In this way, when storing and transporting the water cobra, pay attention to the above things, so as to ensure the safety of this spiritual object and make it arrive at the destination smoothly.

In recent years, the market price trend of Wuhe perch armor fresh has attracted much attention. In the past, the price of Wuhe perch armor fresh in the market was still stable, because of its specific production place, and the amount of fish caught was relatively constant. It was a good product in the meal, and it was sought in all cities in the north and south.
However, in recent years, the market price has dropped, and the market price has fluctuated. First, the change of time has a great impact. In case of a flood disaster, or a surly climate, the water conditions in the Wuhe region are abnormal, and the reproduction and growth of perch armor fresh are hindered by it. The catch is greatly reduced, the market goods are insufficient, and the price rises. On the contrary, if the weather is smooth, the water is beautiful fish fertilizer, and the catch is abundant, the price will tend to drop.
Second, man-made things also affect its price. With the rise of business travel, trade has moved more and more, and the freshness of the Five Rivers Perch Armor has become more and more popular. In addition, merchants are hoarding goods, or manipulating the market, the price also changes according to their hearts. There are also changes in fishing methods and the introduction of new technologies. Although the catch increases for a while, it will grow from a distance, or cause damage to the fresh habitat of the perch Armor, the resources are gradually depleted, and the price is rising.
Third, the replacement of other things is also the main reason. There are many aquatic species in the city. If there are new fresh products that are delicious and affordable, diners may turn to them, and the demand for the freshness of the Five Rivers Perch Armor will drop, and the price will also decline. However, if it can be unique, win by taste and quality, and there are still many seekers, the price can also rise steadily.
Overall, the rise and fall of the market price of Wuhe perch armor fresh depends on the weather, personnel, and the replacement of other things. Its price state, or like waves, rises and falls from time to time, which is difficult to be constant. Both business owners and seekers should observe the changes in time to adapt to the changes in market conditions.