Silver ions have excellent antibacterial and bactericidal effects. Ordinary antibiotics can only act on 6 kinds of bacteria on average, but silver ions can destroy 650 kinds of bacteria. Silver ions can weaken the active enzymes in bacteria, thus preventing side effects, strengthening the tolerance of bacteria and fundamentally controlling the reproduction of bacteria.
NASA regards silver as the safest sterilization agent, and uses silver as the main material to make drinking water containers and spacecraft purifiers. More than half of the airlines in the world choose silver-based water purification system. Just as modern science has continuously confirmed the efficacy of silver ions on health.
Dr. Robert Buick, the author of Man and Electronics, mentioned that a considerable part of human immunity depends on silver ions. If the content of silver ions is reduced by 0.005438+0%, the probability of suffering from various diseases will increase.
Four silver-containing drugs, silver nitrate, protein silver, silicon carbon silver and sulfadiazine silver, have been included in modern pharmacopoeia, which are used to treat conjunctivitis, gonorrhea, cystitis, dysentery, enteritis, burns and other diseases.
Antibacterial effect of silver
Silver is one of the trace elements in human tissues, and trace silver is harmless to human body. WHO stipulates that the safe value of silver to human body is below 0.05ppm, and the limit of silver ion in drinking water is 0.05 mg/L.
The antibacterial mechanism of silver is metal ions and photocatalysis. Mr. Zhang Wenzheng once said that the chemical structure of silver determines that silver has high catalytic ability, and the reduction potential of highly oxidized silver is extremely high enough to generate atomic oxygen in the surrounding space. Atomic oxygen is highly oxidizing and can kill bacteria. Ag+ can strongly attract sulfhydryl group (-SH) on protease in bacteria, and quickly combine with it, making protease inactive and leading to bacterial death. When the bacteria are killed by Ag+, Ag+ is released from the bacterial carcasses and then comes into contact with other colonies. The above process is repeated, which is also the reason for the persistence of silver sterilization. According to the determination, when the content of Ag+ in water is 0.0 1mg/ 1, Escherichia coli in water can be completely killed, and no new flora is produced within 90 days.
Nano-silver particles can identify the flora well in the sterilization process, maintain the living environment of beneficial flora well, and do no harm to the normal flora, normal cells and human immune system. Therefore, nano-silver will not produce any toxic or irritating reaction to human body.
Colloidal silver (fine particles with the particle size of 10- 100nm) has better bactericidal effect. Braun and Koch analyzed the effect of silver through in vitro experiments. They inoculated several special microorganisms and microorganisms naturally growing in the human mouth into agar culture dishes, and then put them into gelatin sponges containing silver. The experimental results clearly show that colloidal silver has antibacterial and bactericidal effects and can prevent wound infection and secondary infection. Their research also confirmed that colloidal silver is insoluble, will not elute from sponge, and has a sustained release effect. Recent studies have further confirmed the effectiveness of colloidal silver. L+S GmbH (Germany, test reportNo.117021,117020) conducted two tests. Their test procedure completely follows the evaluation method of antibacterial materials in German Pharmacopoeia, and tests the effects of colloidal silver on bacteria, yeast and fungi. Observed in a specific time, it was found that colloidal silver had significant antibacterial effect and there was no microbial growth around it. The laboratory concluded that colloidal silver has antibacterial effect.
[Life function of silver] Silver can not only destroy invasive bacteria harmful to human body, but also help to repair and rebuild life.
Important human tissues, such as Dr. Robert O. Becker, a famous biomedical researcher, wrote down his observation and research results in Body Electricity: "Silver has a very effective role in promoting the regeneration of skin and other delicate tissues, which is unmatched by other natural processes." In addition, silver can effectively promote the growth of bones and improve the recovery ability of injured tissues by 50% in a special way. Dr. Becker observed that colloidal silver can effectively promote the growth of cells, which can reach the growth rate of young children's cells. At the same time, Dr. Becker observed that the lack of silver in human body is related to some diseases. The average silver content of human body is 0.00 1%. If the ratio is lower than this value, the normal work of the immune system will be affected, and silver plays a very important role in the basic life process.