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

The next step in DNA computing: GPS mapping? May 6th, 2015

Improving Clinical Care and Patient Quality of Life in Advanced Liver Disease, d-LIVER Workshop, Milan, 27 May 2015 May 6th, 2015

Grafoid Acquires MuAnalysis Inc; Expands Its Advanced Materials Testing Capabilities May 6th, 2015

Winner Announced for NNI’s First ‘EnvisioNano’ Nanotechnology Image Contest May 6th, 2015

Academic/Education

New JEOL E-Beam Lithography System to Enhance Quantum NanoFab Capabilities May 6th, 2015

FEI Partners With the George Washington University to Equip New Science & Engineering Hall: Suite of new high-performance microscopes will be used for cutting-edge experiments at GW’s new research facility April 29th, 2015

Renishaw Raman systems used to study 2D materials at Boston University, Massachusetts, USA. April 28th, 2015

SUNY Poly and Sematech Announce Air Products Joins Cutting-Edge CMP Center At Albany Nanotech Complex April 28th, 2015

Announcements

The next step in DNA computing: GPS mapping? May 6th, 2015

Improving Clinical Care and Patient Quality of Life in Advanced Liver Disease, d-LIVER Workshop, Milan, 27 May 2015 May 6th, 2015

Grafoid Acquires MuAnalysis Inc; Expands Its Advanced Materials Testing Capabilities May 6th, 2015

Winner Announced for NNI’s First ‘EnvisioNano’ Nanotechnology Image Contest May 6th, 2015

Food/Agriculture/Supplements

Nanoparticles in consumer products can significantly alter normal gut microbiome May 4th, 2015

Research seeks alternatives for reducing bacteria in fresh produce using nanoengineering April 29th, 2015

Simultaneous Measurement of Drugs Made Possible by Nanosensors April 29th, 2015

Sensor Designed in Iran Able to Remove Formaldehyde Gas from Environment April 27th, 2015

Safety-Nanoparticles/Risk management

Nanoparticles in consumer products can significantly alter normal gut microbiome May 4th, 2015

MIPT researchers put safety of magic anti-cancer bullet to test April 6th, 2015

NNI Publishes Workshop Report Assessing the Status of EHS Risk Science: Report examines progress three years after the release of the 2011 NNI EHS Research Strategy March 23rd, 2015

Are current water treatment methods sufficient to remove harmful engineered nanoparticle? March 10th, 2015

Research partnerships

New chip architecture may provide foundation for quantum computer: Researchers at the Georgia Tech Research Institute have developed a microfabricated ion trap architecture that holds promise for increasing the density of qubits in future quantum computers May 5th, 2015

'Microcombing' creates stronger, more conductive carbon nanotube films May 5th, 2015

Silicon Storage Technology and GLOBALFOUNDRIES Announce Qualification of Automotive Grade 55nm Embedded Flash Memory Technology May 5th, 2015

Electron chirp: Cyclotron radiation from single electrons measured directly for first time: Method has potential to measure neutrino mass and look beyond the Standard Model of the universe April 29th, 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