Featured Research

from universities, journals, and other organizations

Clemson Researchers Create Biosensors To Protect Nation's Food And Water Supplies

Date:
June 26, 2002
Source:
Clemson University
Summary:
At Clemson University, researchers are developing a biosensor that will make contaminated food glow in the dark. A team of chemists, microbiologists and food scientists have devised a way to tether luminescent molecules to food pathogens, such as E.coli, and Salmonella.

CLEMSON — Unlike nuclear terrorism, bioterrorism won't begin with a bang. It will begin with a whimper — a child feeling the effects of food poisoning. E.coli, Listeria, Campylobacter, Salmonella are not weapons of mass destruction, they are weapons of mass disruption. Experts say it's not a matter of if but when terrorists will attempt a strike at our food or water supply. If they succeed, hundreds, perhaps thousands, of Americans will become sick, and some among the youngest and oldest victims could die.

An early warning detection system is urgently needed. At Clemson University, researchers are developing a biosensor that will make contaminated food glow in the dark.

A team of chemists, microbiologists and food scientists have devised a way to tether luminescent molecules to food pathogens, such as E.coli, and Salmonella. Using nanotechnology, the researchers are building a new screening method to protect our food supply.

"What's needed is a simple, low cost way to rapidly detect pathogens at the site of contamination, not having to wait for lab results," said food science professor and team leader Paul Dawson. "What we have worked on are particles that are luminescent, providing a way to flash an alarm to hold the food for closer examination."

Chemists used a similar technique to identify worms in pecans. The worms would absorb a chemical that would glow under UV or "black" light. Dawson, along with professors Ya-Ping Sun, Xiuping Jiang, Feng Chen and James C. Acton, have miniaturized the process by applying nanotechnology, the science of building structures at molecular and atomic levels. It is not just the science of the very small, it is a technology, enabling the practical application of that knowledge by scientists who investigate arranging atoms to create innovations that can be seen only with electron microscopes.

Nature does a great job of putting together molecules and other nanoscale components in complex patterns, Dawson said. His team is working on a single molecule process, creating a "protein key" that would "key and lock" with another molecule and creating a bio-alarm, when key and lock fit. Most pathogens and toxins have a unique "lock," and by attaching the matching "key" on the surface of a luminescing nanoparticle, a nanosensor can be created. The sensor signal can be rapidly detected and be a first line of defense in identifying food or water that has been contaminated.

"The nanoparticle can move into crevices in the food source, where a pathogen could be hidden from microscopic view," Dawson said. "The particle's extremely small size increases the odds that the antibody and antigen will link, enabling the sensor to give off a glow. The more connections, the greater the glow."

Derived from the Greek word for midget, "nano" means a billionth part. A nanometer (abbreviated nm), for example, is one billionth of a meter. An atom measures about one-third of a nanometer. The diameter of a human hair is about 200,000 nm.


Story Source:

The above story is based on materials provided by Clemson University. Note: Materials may be edited for content and length.


Cite This Page:

Clemson University. "Clemson Researchers Create Biosensors To Protect Nation's Food And Water Supplies." ScienceDaily. ScienceDaily, 26 June 2002. <www.sciencedaily.com/releases/2002/06/020625062836.htm>.
Clemson University. (2002, June 26). Clemson Researchers Create Biosensors To Protect Nation's Food And Water Supplies. ScienceDaily. Retrieved July 25, 2014 from www.sciencedaily.com/releases/2002/06/020625062836.htm
Clemson University. "Clemson Researchers Create Biosensors To Protect Nation's Food And Water Supplies." ScienceDaily. www.sciencedaily.com/releases/2002/06/020625062836.htm (accessed July 25, 2014).

Share This




More Plants & Animals News

Friday, July 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Boy Attacked by Shark in Florida

Boy Attacked by Shark in Florida

Reuters - US Online Video (July 24, 2014) An 8-year-old boy is bitten in the leg by a shark while vacationing at a Florida beach. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Goma Cheese Brings Whiff of New Hope to DRC

Goma Cheese Brings Whiff of New Hope to DRC

Reuters - Business Video Online (July 24, 2014) The eastern region of the Democratic Republic of Congo, mainly known for conflict and instability, is an unlikely place for the production of fine cheese. But a farm in the village of Masisi, in North Kivu is slowly transforming perceptions of the area. Known simply as Goma cheese, the Congolese version of Dutch gouda has gained popularity through out the region. Ciara Sutton reports. Video provided by Reuters
Powered by NewsLook.com
Dogs Appear To Become Jealous Of Owners' Attention

Dogs Appear To Become Jealous Of Owners' Attention

Newsy (July 23, 2014) A U.C. San Diego researcher says jealousy isn't just a human trait, and dogs aren't the best at sharing the attention of humans with other dogs. Video provided by Newsy
Powered by NewsLook.com
Professor Creates Site Revealing Where People's Cats Live

Professor Creates Site Revealing Where People's Cats Live

Newsy (July 23, 2014) ​It's called I Know Where Your Cat Lives, and you can keep hitting the "Random Cat" button to find more real cats all over the world. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

    Health News

      Environment News

        Technology News



          Save/Print:
          Share:

          Free Subscriptions


          Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

          Get Social & Mobile


          Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

          Have Feedback?


          Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
          Mobile: iPhone Android Web
          Follow: Facebook Twitter Google+
          Subscribe: RSS Feeds Email Newsletters
          Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins