humble3d Posted March 24, 2020 Share Posted March 24, 2020 COPPER - SILVER AS ANTI ANTIMICROBIALS ?? DOES COPPER HAVE ANTIMICROBIC ABILITIES ? ...MAYBE... DOES SILVER HAVE ANTIMICROBIC ABILITIES ?... MAYBE... Capable of destroying or inhibiting the growth of disease-causing microorganisms... An agent (as heat, radiation or a chemical) that destroys microorganisms that might carry disease... antimicrobic germicide An agent (as heat, radiation or a chemical) that destroys microorganisms that might carry disease germicidal "Germicidal chemicals can be used to disinfect and, in some cases, sterilize" Preventing infection DOES COPPER HAVE ANTIMICROBIAL ABILITIES ? ... The surfaces of copper and its alloys, such as brass and bronze, are antimicrobial. They have an inherent ability to kill a wide range of harmful microbes relatively rapidly – often within two hours or less – and with a high degree of efficiency.... In a separate initiative not funded by the U.S. Department of Defense, clinical trials at an infectious disease outpatient ward consisting of patients with HIV and other infectious diseases are being conducted at North Shore University Hospital in Manhasset, New York. An alloy of 90% Cu 10% Ni significantly lowered the microbial burden, primarily Staphylococci, on arm surfaces of phlebotomy chairs versus wooden arm surfaces. The median reduction for total bacteria on the copper alloy chairs arms was 90%. Use of the chair with copper arm tops resulted in a 17-fold lower risk of exposure to environmental microbes than when patients used the standard chair. The majority of the samples from the chairs with copper components were below the 500 CFU/cm2 level believed to represent a risk to hospital patients.[6]... READ MORE... https://en.wikipedia.org/wiki/Antimicrobial_copper-alloy_touch_surfaces DOES SILVER HAVE ANTIMICROBIC ABILITIES ? Recent studies have revealed that the antimicrobial properties of silver are due to its ionized form, Ag+, and its ability to cause damage to cells by interacting with thiol-containing proteins and DNA. The antimicrobial properties of silver have been known to cultures all around the world for many centuries. The Phonecians stored water and other liquids in silver coated bottles to discourage contamination by microbes (Wikipedia: Silver). Silver dollars used to be put into milk bottles to keep milk fresh, and water tanks of ships and airplanes that are "silvered" are able to render water potable for months (Saltlakemetals.com). In 1884 it became a common practice to administer drops of aqueous silver nitrate to newborn's eyes to prevent the transmission of Neisseria gonorrhoeae from infected mothers to children during childbirth (Silvestry-Rodriguez et al., 2007). ...onized silver In order for silver to have any antimicrobial properties, it must be in its ionized form (Lok et al., 2007; Rai et al., 2009). Silver in its non-ionized form is inert (Guggenbichler et al., 1999), but contact with moisture leads to the release of silver ions (Radheshkumar and Munstedt, 2005). Thus, all forms of silver or silver containing compounds with observed antimicrobial properties are in one way or another sources of silver ions (Ag+); these silver ions may be incorporated into the substance and released slowly with time as with silver sulfadiazine, or the silver ions can come from ionizing the surface of a solid piece of silver as with silver nanoparticles.... READ MORE... https://microbewiki.kenyon.edu/index.php/Silver_as_an_Antimicrobial_Agent --MORE-- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2364932/ Link to comment Share on other sites More sharing options...
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