Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Various Types of Silver Nanoparticles Show Different Reactions against Bacteria

Abstract:
Researchers from Islamic Azad University and Tehran University of Medical Sciences in association with researchers from the University of California discovered various effects of different types of silver nanoparticles on bacteria and their anti-bacterial properties.

Various Types of Silver Nanoparticles Show Different Reactions against Bacteria

Tehran, Iran | Posted on January 30th, 2013

Anti-microbial and antibacterial effects of silver are known to everyone. However, different papers have presented contradictory results about the antibacterial effects of silver nanoparticles, including the potential toxicity of silver nanoparticles when they interact with various types of bacteria.

It is well known at the moment that the surfaces of nanomaterials are immediately covered with protein when they are in contact with a live tissue. The formation of protein corona in the surface of nanoparticles creates a new biological identity in biological media, which determines cellular/tissue responses.

This research investigated the anti-microbial properties of silver nanostructures with different shapes against the three types of bacteria including E. coli, bacillus subtilis, staphylococcus aureus, and the results confirmed the important effect of bacteria on the performance of nanoparticles. The toxicity of similar amount of each of the nanoparticles types was studied in each bacterium, and the results showed that each bacterium gave a different response to each of the nanoparticles. The researchers claim that the significant differences in bacteria membrane composition are the cause of various toxicity results.

Protein corona composition was finally studied in details on the surface of nanoparticles. Results showed that proteins have much more tendency to join the sharp edges in nanoparticles surface rather than to join the flat surfaces. In addition, the both proteins (with high molecular weight and low molecular weight) have more tendencies towards sharp surfaces rather than sphere and wire.

Results of the research have been published in May 2012 in Chemical Research in Toxicology, vol. 25, issue 6. For more information about the details of the research, visit the full paper on pages 1231-1242 of the same journal.

####

For more information, please click here

Copyright © Fars News Agency

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Industrial Nanotech, Inc. to Publish PCAOB Audited Financials July 31st, 2014

Nanostructured metal-oxide catalyst efficiently converts CO2 to methanol: Highly reactive sites at interface of 2 nanoscale components could help overcome hurdle of using CO2 as a starting point in producing useful products July 31st, 2014

Carnegie Mellon Chemists Create Nanofibers Using Unprecedented New Method July 31st, 2014

Pressure probing potential photoelectronic manufacturing compound July 31st, 2014

Nanomedicine

Arrowhead to Report Fiscal 2014 Third Quarter Financial Results- Conference Call Scheduled for Tuesday, August 12, 2014 - July 31st, 2014

New imaging agent provides better picture of the gut July 30th, 2014

Zenosense, Inc. July 29th, 2014

Optimum inertial design for self-propulsion: A new study investigates the effects of small but finite inertia on the propulsion of micro and nano-scale swimming machines July 29th, 2014

Discoveries

Study finds physical link to strange electronic behavior: Neutron measurements offer new clues about iron-based superconductor July 31st, 2014

Nanostructured metal-oxide catalyst efficiently converts CO2 to methanol: Highly reactive sites at interface of 2 nanoscale components could help overcome hurdle of using CO2 as a starting point in producing useful products July 31st, 2014

Carnegie Mellon Chemists Create Nanofibers Using Unprecedented New Method July 31st, 2014

Pressure probing potential photoelectronic manufacturing compound July 31st, 2014

Announcements

Industrial Nanotech, Inc. to Publish PCAOB Audited Financials July 31st, 2014

Nanostructured metal-oxide catalyst efficiently converts CO2 to methanol: Highly reactive sites at interface of 2 nanoscale components could help overcome hurdle of using CO2 as a starting point in producing useful products July 31st, 2014

Carnegie Mellon Chemists Create Nanofibers Using Unprecedented New Method July 31st, 2014

Pressure probing potential photoelectronic manufacturing compound July 31st, 2014

Research partnerships

Study finds physical link to strange electronic behavior: Neutron measurements offer new clues about iron-based superconductor July 31st, 2014

Carnegie Mellon Chemists Create Nanofibers Using Unprecedented New Method July 31st, 2014

New imaging agent provides better picture of the gut July 30th, 2014

Breakthrough laser experiment reveals liquid-like motion of atoms in an ultra-cold cluster: University of Leicester research team unlocks insights into creation of new nano-materials July 25th, 2014

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE