Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


DHgate

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

Using ultrathin sheets to discover new class of wrapped shapes: UMass Amherst materials researchers describe a new regime of wrapped shapes August 31st, 2015

New material science research may advance tech tools August 31st, 2015

Efficiency of Nanodrug Containing Antibiotics in Treatment of Infectious Diseases Evaluated August 31st, 2015

Researchers use DNA 'clews' to shuttle CRISPR-Cas9 gene-editing tool into cells August 30th, 2015

Nanomedicine

Efficiency of Nanodrug Containing Antibiotics in Treatment of Infectious Diseases Evaluated August 31st, 2015

Researchers use DNA 'clews' to shuttle CRISPR-Cas9 gene-editing tool into cells August 30th, 2015

Iranian Scientists Use Artemisia Annua Plant to Produce Breast Cancer Drugs August 29th, 2015

Small but heading for the big time: Nanobiotix half year results for the six months ended 30 June 2015, in line with expectations: Major clinical achievements and corporate developments August 28th, 2015

Discoveries

Using ultrathin sheets to discover new class of wrapped shapes: UMass Amherst materials researchers describe a new regime of wrapped shapes August 31st, 2015

An engineered surface unsticks sticky water droplets August 31st, 2015

New material science research may advance tech tools August 31st, 2015

Efficiency of Nanodrug Containing Antibiotics in Treatment of Infectious Diseases Evaluated August 31st, 2015

Announcements

Using ultrathin sheets to discover new class of wrapped shapes: UMass Amherst materials researchers describe a new regime of wrapped shapes August 31st, 2015

An engineered surface unsticks sticky water droplets August 31st, 2015

New material science research may advance tech tools August 31st, 2015

Efficiency of Nanodrug Containing Antibiotics in Treatment of Infectious Diseases Evaluated August 31st, 2015

Research partnerships

Nanocatalysts improve processes for the petrochemical industry August 28th, 2015

Announcing Oxford Instruments and School of Physics signing a Memorandum of Understanding August 26th, 2015

Researchers combine disciplines, computational programs to determine atomic structure August 26th, 2015

Developing Component Scale Composites Using Nanocarbons August 26th, 2015

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







Car Brands
Buy website traffic