Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Tiny Gold Particles Help Researchers Find Protein Impostor

Abstract:
University of Miami assistant professor in the College of Engineering, Na Li and her collaborators have developed a fast, economical and easy method to detect melamine in milk. Melamine is the compound found in contaminated pet food and in tainted dairy products from China in 2007 and 2008 respectively. The laced dairy products were responsible for sickening thousands of people, especially children. The situation caused recalls of Chinese dairy products all over the world.

Tiny Gold Particles Help Researchers Find Protein Impostor

Coral Gables, FL | Posted on April 3rd, 2010

Monitoring melamine-tainted products continues to be a worldwide concern. Melamine is an industrial substance commonly used in plastics and fertilizers. Since Melamine is high in nitrogen, when added to foods it can make the products appear higher in protein value during standard testing. However, when ingested, the chemical can cause serious health problems and in some cases death.

The new method is described in the study titled "Rapid Detection of Melamine in Whole Milk Mediated by Unmodified Gold Nanoparticles," published online this week by the journal Applied Physics Letters and available at: link.aip.org/link/?APL/96/133702

This study develops a facile and accurate approach towards detection of melamine utilizing gold nanoparticles and a dual color and precipitation test. The complete detection methodology is completed in less than 15 minutes,

"Current methods of melamine detection in milk are costly and time consuming," says Na Li, assistant professor in the Department of Mechanical and Aerospace Engineering, at the University of Miami and senior corresponding author of this study. "Our work represents a significant step towards the rapid detection of melamine, which addresses a critical global issue."

The researchers first step is to separate the casein-based milk component, which can interfere with melamine detection. Next, they add gold nanoparticles to the solution. The interaction between the gold nanoparticles and melamine causes a dramatic color change indicating the presence of melamine. When melamine is present, the color of the solution changes from red to blue within seconds and can be measured both by visual inspection and spectrophotometry. Cyanuric acid, which has a specific reaction with melamine, is introduced sequentially to increase specificity. If melamine is present, a precipitant is formed, which can also be assessed both visually and by spectrophotometry.

"This method provides a unique opportunity to use the highly sensitive detection properties of nanoparticles to prevent people from being harmed by melamine ingestion," says Dean Ho, assistant professor in the Departments of Biomedical and Mechanical Engineering, and at the Robert H. Lurie Comprehensive Cancer Center at Northwestern University and co-corresponding author of this study. "It's important to utilize nanoparticles that can be manufactured in high yield, which makes it possible to have a method that can be widely used."

In the future, the researchers hope to develop a commercial simple kit that can be used by the lay person, at home or in the field, to detect melamine contaminant in food.

"Our method provides not only an alternative method to the current lab based detection, but also the way for early screening of the milk, especially for field work and for developing countries," says Fang Wei, staff research associate in the Department of Mechanical and Aerospace Engineering, at the University of California, Los Angeles and first author of this study.

####

About University of Miami
The University of Miami’s mission is to educate and nurture students, to create knowledge, and to provide service to our community and beyond. Committed to excellence and proud of the diversity of our University family, we strive to develop future leaders of our nation and the world.

For more information, please click here

Contacts:
Marie Guma-Diaz

Copyright © University of Miami

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

Keysight Technologies Shifts to Direct Sales of High-Performance Products in North America March 3rd, 2015

Cambrios and Heraeus Jointly Create New, High-Conductivity Transparent Conductors: Two Companies' Combined Products Dramatically Extend Flexible Substrate Capabilities for Next-Generation Mass-Market Technology Products March 3rd, 2015

The taming of magnetic vortices: Unified theory for skyrmion-materials March 3rd, 2015

Democratizing synthetic biology: New method makes research cheaper, faster, and more accessible March 3rd, 2015

Academic/Education

NanoTecNexus Launches New App for Learning About Nanotechnology—STEM Education Project Spearheaded by Interns February 26th, 2015

SUNY Poly CNSE Researchers and Corporate Partners to Present Forty Papers at Globally Recognized Lithography Conference: SUNY Poly CNSE Research Group Awarded Both ‘Best Research Paper’ and ‘Best Research Poster’ at SPIE Advanced Lithography 2015 forum February 25th, 2015

KIT Increases Commitment in Asia: DAAD Funds Two New Projects: Strategic Partnerships with Chinese Universities and Communi-cation Technologies Network February 22nd, 2015

Minus K Technology Announces Its 2015 Vibration Isolator Educational Giveaway to U.S. Colleges and Universities February 18th, 2015

Announcements

The taming of magnetic vortices: Unified theory for skyrmion-materials March 3rd, 2015

Democratizing synthetic biology: New method makes research cheaper, faster, and more accessible March 3rd, 2015

Pens filled with high-tech inks for do-it-yourself sensors March 3rd, 2015

Black phosphorus is new 'wonder material' for improving optical communication March 3rd, 2015

Food/Agriculture/Supplements

Simple, Cost-Efficient Method Used to Determine Toxicants Growing in Pistachio February 26th, 2015

Iranian Scientists Find Solution to Measure Species Existing in Liquids February 6th, 2015

Best practice guide for the safe handling and use of nanoparticles in packaging industries now available: A novel best practice guide is now available to support the safe handling and use of nanoparticles in packaging industries February 2nd, 2015

Everything You Need To Know About Nanopesticides January 30th, 2015

Safety-Nanoparticles/Risk management

Colon + septic tank = unique, at times stinky, study: Researchers use lab-scale human colon and septic tank to study impact of copper nanoparticles on the environment March 2nd, 2015

Potential toxicity of cellulose nanocrystals examined in Industrial Biotechnology journal February 19th, 2015

A breakthrough in nanotoxicology by INRS researchers: Silver nanoparticles and inflammation February 18th, 2015

“Nanorama Laboratory“: Free Tool on Safe Handling of Nanomaterials Now Available in English! February 4th, 2015

Research partnerships

Cambrios and Heraeus Jointly Create New, High-Conductivity Transparent Conductors: Two Companies' Combined Products Dramatically Extend Flexible Substrate Capabilities for Next-Generation Mass-Market Technology Products March 3rd, 2015

The taming of magnetic vortices: Unified theory for skyrmion-materials March 3rd, 2015

Breakthrough in OLED technology March 2nd, 2015

UC research partnership explores how to best harness solar power March 2nd, 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







© Copyright 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE