A number of researches have found the biochemical reaction of silver ions that lead to the inactivation of bacteria, protozoa, fungi, etc that are not protected with proteinaceous membranes. The exclusive chemisorption of atomic oxygen in aqueous and gaseous media on the surface…
Download file to see previous pages...
& Etris, S.F. 1997 p.107-114).
The mechanism of inhibition performed by silver ions on bacteria was analysed using gram-positive Straphylococcus aureus and gram negative E.coli by treating with AgNO3 and was analysed using a combined X-ray microanalysis and electron microscopy. Both S.aureus and E.coli cells exhibited similar morphological changes after silver treatment. The cell wall of the bacteria detached the cytoplasm membrane and a remarkable electron-light area surfaced in the middle of the cells that contained condensed DNA molecules. Several electron dense granules were also found deposited inside the cell or surrounding the cell wall. The presence of elements of sulphur and silver in cytoplasm and electron dense granules detected by X-ray microanalysis revealed the antibacterial actions of silver. The protein became inactivated and DNA lost its ability to replicate after the treatment of silver (Feng et al 2000 p.662-668).
The anti-bacterial action of silver is based on the release of silver (Ag+ ions) that act by displacing essential ions of metals such as Zn+ or Ca2+. A study by Dowling et al using anti-bacterial silver coating deposited on heat sensitive polymeric substrates deploying a combination of neutral atom beam and magnetron sputtering indicates that platinum can be used to increase the release of Ag+ ions from the silver coating. In a galvanic setting platinum exhibits enhanced activity than silver and therefore platinum enhances silver ion formation during the galvanic action. The analysis of bacterial adhesion and bactericidal reaction on coated polymers using straphylococcus epidermidis reveals that the addition of 1% platinum significantly increases the anti-bacterial effectiveness of silver coatings. For every 5 nm thick Ag/1% Platinum coatings on silicone, up to a two log reduction in bacterial adhesion is achieved that did not show cytotoxicity (Dowling et al. 2003
...Download file to see next pagesRead More
Cite this document
(“Do silver ions kill bacteria Essay Example | Topics and Well Written Essays - 250 words”, n.d.)
Retrieved from https://studentshare.org/miscellaneous/1559850-do-silver-ions-kill-bacteria
(Do Silver Ions Kill Bacteria Essay Example | Topics and Well Written Essays - 250 Words)
“Do Silver Ions Kill Bacteria Essay Example | Topics and Well Written Essays - 250 Words”, n.d. https://studentshare.org/miscellaneous/1559850-do-silver-ions-kill-bacteria.
This was done under the permision of the clinical educator in a clinial placement session whose objective was to assess this modality. The assesment was based on sessions conducted by a district nurse. In this paper, a brief descriptionof the case study format as well as some of the key issues underlying the modality will be provided.
Name: Instructor: Task: Date: Bacteria Introduction Bacteria refer to single-celled living organisms, which are smaller than the smallest animal and plant cells. A bacterium contains cytoplasm enclosed by a membrane and a cell wall. The bacterial cell contains some genetic material with the purpose of carrying the body’s instructions to the cell.
The proximity of the Toronto Harbor makes the resort attractive for the visitors. The resort has 20 rooms in total out of which 6 are luxury suits meant for the Elite Class and the rest 14 are for regular visitors. There are two swimming pools at the backside of the resort and a lawn attached to the garden.
It was given the name "quicksilver" because of its liquid character and its silver-white appearance. Mercury was not recognized as a true metal or as an element until the middle of the eighteenth century. Its Latin name, hydrargyrum, meaning liquid silver, is the source of the symbol Hg.
They found that antibiotics allow to neutralize or kill bacteria but 'learn' how to resist this impact. One important aspect of a scientific theory about a phenomenon is that it seeks to unravel and present in a clear way that phenomenon's causal properties and relations.
Prepare eight nutrient broth cultures by adding 25 ml of nutrient broth to each of eight of the centrifuge tubes. Add a colony of E. coli ATCC 15766 to each of four of the centrifuge tubes. Now add a colony of staphylococcus aureus ATCC 157293 to each of four of the
Additionally, the flagella help the bacteria in their movements, and the fimbriae that attach them to their hosts.
Flagella are the structures made of proteins that look like tails. They allow the bacteria to swim when the motor features in the plasma membrane spin