Antibacterial effects of silver
Silver is one of the trace elements within the Periodic Table. Traces of silver are harmless to humans. The WHO (World Health Organisation) safety guidelines for ingestion of silver is 0.05ppm or less of silver ions in drinking water. Limit of 0.05mg / l litre
Mr Zhang Wenzheng speaking on the Antibacterial properties related to silver metal ions and photocatalysis, said. Chemical structure determines whether the silver has a high catalytic ability, extremely high oxidation and reduced potential of silver. The chemical structure also determines whether there is enough space around it to produce atomic oxygen. Oxygen atoms can be sterilized with strong oxidizing, Ag + can be strongly attracted to the bacterial body mercapto (-SH) elastase, which rapidly combine so that the loss of activity of the protease results in bacterial death. When the bacteria are killed, Ag + are freed and then attack the other colonies of bacteria in the body, again and again to carry out the above process, which is the reason for the persistence of silver sterilization. According to the determination, when water contains Ag + 0.01mg / 1, the water will be able to completely kill large bacillus and can maintain this for up to 90 days without spawning new flora.
Nano-silver particles in the sterilization process can identify good flora and beneficial bacteria that can maintain a good living environment for the human body's normal flora and cells without any damaging effects and does not destroy the body's immune system. Therefore, silver nanoparticles in the human body do not have any toxic reactions or irritation.
Colloidal silver (particle sizes ranging between fine particles of 10-100nm) has a more effective bactericidal effect. BRAUN and KOCH analyzed the effect of in-vitro tests of silver. They tested a few species of natural growths of human oral microbes and microbial innoculation in agar plates. Then placed a gelatin sponge containing silver into the agar plates containing the microbes. The results showed clearly that colloidal silver has bacteriostatic and bactericidal properties. These properties can prevent wound infection and secondary infection. Their study also confirmed that colloidal silver has insolubility not eluted from the sponge, with a sustained release effect. Recent studies further confirmed the validity of colloidal silver. 1992 L + S GmbH (Germany, the test report number 1117021,1117020). Their test procedures fully comply with the German Pharmacopoeia antibacterial materials on evaluation methods. They conducted two trials and tested the effects of colloidal silver on bacteria, yeasts and fungi. Observed in a specific time period, colloidal silver was found to have a significant antibacterial effect, with no growth of microorganisms. The lab concluded: colloidal silver has antibacterial effects.
Published : 30-Sep-2014