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

Characterizing inkjet inks: Malvern Instruments presents new rheological research April 23rd, 2014

NanoSafe, Inc. announces the addition of the Labconco Protector® Glove Box to its NanoSafe Tested™ registry April 23rd, 2014

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Nanomedicine

QuantuMDx announce prototype handheld lab for 15 minute malaria diagnosis and drug resistance testing April 23rd, 2014

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

Cloaked DNA nanodevices survive pilot mission: Successful foray opens door to virus-like DNA nanodevices that could diagnose diseased tissues and manufacture drugs to treat them April 22nd, 2014

Berkeley Lab Researchers Demonstrate First Size-based Chromatography Technique for the Study of Living Cells April 22nd, 2014

Discoveries

Atomic switcheroo explains origins of thin-film solar cell mystery April 23rd, 2014

Characterizing inkjet inks: Malvern Instruments presents new rheological research April 23rd, 2014

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Announcements

Characterizing inkjet inks: Malvern Instruments presents new rheological research April 23rd, 2014

NanoSafe, Inc. announces the addition of the Labconco Protector® Glove Box to its NanoSafe Tested™ registry April 23rd, 2014

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Research partnerships

University of Waterloo Visits China to Strengthen Bonds With Research Partners April 21st, 2014

Novel stapled peptide nanoparticle combination prevents RSV infection, study finds April 17th, 2014

Scientists Capture Ultrafast Snapshots of Light-Driven Superconductivity: X-rays reveal how rapidly vanishing 'charge stripes' may be behind laser-induced high-temperature superconductivity April 16th, 2014

Scalable CVD process for making 2-D molybdenum diselenide: Rice, NTU scientists unveil CVD production for coveted 2-D semiconductor April 8th, 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