Using silver can detect whether food is toxic, because silver can react with many toxins, making silver black and easy to be recognized by the naked eye. ?
Before BC, the ancients knew that silver could accelerate wound healing, prevent infection, purify water and keep fresh. It can prevent the growth of bacteria, calm the five internal organs, calm the nerves, stop convulsions and eliminate evil spirits. ?
Silver has excellent antibacterial and bactericidal effects. Ordinary antibiotics can only work on an average of 6 kinds of bacteria, while silver can destroy 650 kinds of bacteria. ?
The thermal conductivity of silver is the most prominent among all metals, and it can quickly dissipate the heat of blood vessels. Assume that the thermal conductivity of silver is 100 and that of gold is 53. 2. Iron is 1 1. 6, platinum is 8. 2. This distinct thermal conductivity can quickly reduce the heat of blood vessels and prevent various diseases, with excellent curative effect.
Silver has the function of absorbing toxicity, which is one of the reasons for its discoloration, so it has excellent disinfection performance. This discoloration is only a superficial reaction and can be eliminated with toothpaste or medicine. It can be seen that the importance of silver to health cannot be ignored. ?
Extended data:
Silver, namely silver, is called silver because of its white color, as opposed to gold. Think of it as money and decorations. In ancient times, money was called silver. Pure silver is white in color, metallic in luster with impurities, soft in quality, hardened with impurities, and grayish red in color.
Pure silver has a specific gravity of 10.5, a melting point of 960.5℃, good conductivity, and is soluble in nitric acid and sulfuric acid. Silver is one of the metals found in ancient times. Although silver also exists in the form of simple substance in nature, most of it exists in the form of combined state.
Silver has high ductility, so it can be rolled into a transparent foil with a thickness of only 0.3 microns, and silver particles with a weight of 1 g can be drawn into filaments about two kilometers long. The thermal conductivity and electrical conductivity of silver are among the best among metals.
Pure silver is white in color, metallic in luster with impurities, soft in quality, hardened with impurities, and grayish red in color. The melting point is 96 1.93℃, the boiling point is 22 12℃ and the density is 10.5g/cm3 (20℃).
Silver is soft, flexible and malleable, second only to gold. It can be pressed into sheets and drawn into filaments. Soluble in nitric acid and sulfuric acid. The reflectivity of silver to light reaches 9 1%. At room temperature, halogen can slowly combine with silver to form silver halide. Silver does not react with dilute hydrochloric acid, dilute sulfuric acid and alkali, but can react with strong oxidizing acid concentrated nitric acid and concentrated hydrochloric acid.
The main uses of silver are mainly based on three pillars: industry, photography and jewelry and silverware. The total demand of these three types of silver accounts for about 85% of the demand for silver.
Since ancient times, silver and gold have been regarded as a symbol of wealth together. The chemical symbol of silver is Ag, which comes from the Latin Argertum, meaning "light and brightness". Because silver is white, it is called "silver".
Silver not only has good electrothermal conductivity, but also has high photosensitivity and luminous characteristics, and is used in industry, photography, jewelry, currency manufacturing and so on.
Compared with gold, silver was used for coinage more and earlier and entered the circulation field because of its large supply and low value. Many countries have established the silver standard, with silver coins as the mainstream currency.
Reference: Silver (Precious Metals)-Baidu Encyclopedia