oligodynamic action [ ¦äl·ə·gō·dī′nam·ik ′ak·shən] (microbiology) The inhibiting or killing of microorganisms by use of very small amounts of a chemical substance.
What is oligodynamic action?
What is the toxic effect of negative ions?
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What is the action of Oligodynamic bacteria?
This phenomenon is known as the oligodynamic effect, which one recent study defines as “the ability of small amounts of heavy metals to exert a lethal effect on bacterial cells.” In particular, certain metals including copper have been found to effectively sterilize themselves after a certain period of time, which ...
What is oligodynamic effect in microbiology?
FAQ Overview. The oligodynamic effect was first recognised more than 150 years ago and refers to the fact that some metal ions kill or inhibit the growth of microorganisms. This effect can be observed at extremely low doses.
How does the oligodynamic effect work?
How? Termed the “Oligodynamic Effect”, the process actually isn't well understood, but it's thought that, in simple terms, the metal ions bind with proteins in bacteria cells, a fatal attraction which renders the bacteria inactive. And the process is potent: one study tested water contaminated with E.
What is oligodynamic action of heavy metals?
THE OLIGODYNAMIC action of metals and metal compounds was noted in 1893 by von Naegeli who pointed out that "definite metals and metal compounds confer in minute quanity of water solutions the ability to change and finally kill cells in a characteristic way." Many metallic elements have been observed to inhibit the ...
What is meant by Oligodynamic?
Medical Definition of oligodynamic 1 : active in very small quantities an oligodynamic germicide. 2a : produced by minute quantities oligodynamic action of silver in disinfecting water. b : of or relating to the action of such quantities.
What are examples of heavy metals?
There are 35 metals that are of concern for us because of residential or occupational exposure, out of which 23 are heavy metals: antimony, arsenic, bismuth, cadmium, cerium, chromium, cobalt, copper, gallium, gold, iron, lead, manganese, mercury, nickel, platinum, silver, tellurium, thallium, tin, uranium, vanadium, ...
Is gold an Oligodynamic?
The oligodynamic action of the pure metals aluminium, antimony, bismuth, cadmium, cobalt, copper, gold, iron, lead, manganese, mercury, nickel, platinum, silver, tin, titanium, and zinc on Bacillus subtilis (1 strain), Enterobacteriaceae (26 strains), Legionellaceae (13 strains), Micrococcaceae (6 strains), and ...
Can bacteria survive in a vacuum?
Now, new findings published today in Frontiers in Microbiology, based on that experiment on the International Space Station, show that the bacteria Deinococcus radiodurans can survive at least three years in space.
How do you pronounce Oligodynamic?
0:051:01How To Say Oligodynamic - YouTubeYouTubeStart of suggested clipEnd of suggested clipAmigo dynamics amigo dynamics amigo dynamics amigo dynamics amigo dynamics amigo dynamics.MoreAmigo dynamics amigo dynamics amigo dynamics amigo dynamics amigo dynamics amigo dynamics.
How long is the lag phase?
During the lag phase cells change very little because the cells do not immediately reproduce in a new medium. This period of little to no cell division is called the lag phase and can last for 1 hour to several days. During this phase cells are not dormant.
Why is gold antibacterial?
It is also reported that the mechanism behind its antibacterial activity is by weakening DNA replication and inactivating proteins [10]. On the contrary, gold has low toxicity to biological systems, whether bacteria, animal, or human, due to its elemental properties [11].
Why are some metals antibacterial?
According to the general antibacterial mechanism, the strong antibacterial ability of metal is due to the accumulation of metal ion, thus high metal ion concentration will result in high antibacterial property. But on the other hand, the high metal ion concentration will also lead to cell toxicity.
Is gold an Oligodynamic?
The oligodynamic action of the pure metals aluminium, antimony, bismuth, cadmium, cobalt, copper, gold, iron, lead, manganese, mercury, nickel, platinum, silver, tin, titanium, and zinc on Bacillus subtilis (1 strain), Enterobacteriaceae (26 strains), Legionellaceae (13 strains), Micrococcaceae (6 strains), and ...
Which method of microbial control destroys microorganisms by oxidation of cells?
Which method of microbial control destroys microorganisms by oxidation of cells? denaturing and coagulating cellular proteins.
How do you pronounce Oligodynamic?
0:051:01How To Say Oligodynamic - YouTubeYouTubeStart of suggested clipEnd of suggested clipAmigo dynamics amigo dynamics amigo dynamics amigo dynamics amigo dynamics amigo dynamics.MoreAmigo dynamics amigo dynamics amigo dynamics amigo dynamics amigo dynamics amigo dynamics.
How long is the lag phase?
During the lag phase cells change very little because the cells do not immediately reproduce in a new medium. This period of little to no cell division is called the lag phase and can last for 1 hour to several days. During this phase cells are not dormant.
Oligodynamic effect - Wikipedia
The oligodynamic effect (from Greek oligos, "few", and dynamis, "force") is a biocidal effect of metals, especially heavy metals, that occurs even in low concentrations.. In modern times, the effect was observed by Karl Wilhelm von Nägeli, although he did not identify the cause. Scholarly texts from ancient India promoted the use of brass and silver in ritual cleansing practice as well as in ...
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Mechanism
The metals react with thiol (-SH) or amine (-NH (1,2,3)) groups of proteins, a mode of action to which microorganisms may develop resistance. Such resistance may be transmitted by plasmids.
List of uses
Aluminium acetate ( Burow's solution) is used as an astringent mild antiseptic.
Safety
Besides the individual toxic effects of each metal, a wide range of metals are nephrotoxic in humans and/or in animals. Some metals and their compounds are carcinogenic to humans. A few metals, such as lead and mercury, can cross the placental barrier and adversely affect fetal development.
The Science
Remember when doorknobs were made from copper or brass and cutlery was made from silver? As it turns out, these frequently touched items were made from these metals quite deliberately and for a very good reason.
Did You Enjoy This Article?
Thank you for reading! If you enjoyed this article, you might also like the following articles: Water Quality Testing: The Complete Guide and Copper Pitchers: Health Benefits and Recent Studies
What is oligodynamic action?
Oligodynamic Action. the action of very small concentrations of positive ions (mainly of metals, such as copper, silver, and gold) on living organisms. Oligodynamic action was discovered by K. von Nägeli (findings published in 1893), who observed the retardation of growth of algae upon immersion of pieces of copper or silver in ...
What is the toxic effect of negative ions?
The toxic effect of negative ions—which are capable of inactivating enzyme systems, whose activity depends on the presence of metal atoms— is sometimes also included among the oligodynamic actions. An indispensable condition for the oligodynamic action of metals is their ability to pass into the ionized state.
