HOME >> BIOLOGY >> NEWS
Simple and inexpensive, an artificial nose senses smell by seeing colors

Imagine a small slip of paper that can sniff out odors such as sour milk, illegal drugs, environmental pollutants, poisonous gases or deadly toxins simply by changing color. As reported in the Aug. 17 issue of the journal Nature, chemists Kenneth Suslick and Neal Rakow at the University of Illinois have developed an artificial nose that is simple, fast and inexpensive and works by visualizing odors.

Called "smell-seeing" by its inventors, the technique is based on color changes that occur in an array of vapor-sensitive dyes known as metalloporphyrins doughnut-shaped molecules that bind metal atoms. Metalloporphyrins are closely related to hemoglobin (the red pigment in blood) and chlorophyll (the green pigment in plants).

"Our technique is similar to using litmus paper to determine if a solution is acid by seeing if the paper goes from blue to pink," said Suslick, the William H. and Janet Lycan Professor of Chemistry at the UI. "But we have generalized it so a whole range of chemical properties are being screened by an array of many different dyes that change color when they interact with different chemicals. The resulting changes in the array provides a color fingerprint unique to each vapor."

To create an array, the researchers paint a series of tiny dots each dot is a different dye on an inert backing such as paper, plastic or glass. The array is then scanned with an ordinary flatbed scanner or an inexpensive electronic camera before and after exposure to an odor-producing substance.

"By subtracting the 'before' image from the 'after' image, we obtain the color-change pattern of the odorant," Suslick said. "By comparing that pattern to a library of color fingerprints, we can quickly identify and quantify the chemical compounds present."

Smell-seeing arrays have many potential applications, such as in the food and beverage industry to detect the presence of flavorings, additives or spoilage; in the perfume industry to
'"/>

Contact: James E. Kloeppel, Physical Sciences Editor
kloeppel@uiuc.edu
217-244-1073
University of Illinois at Urbana-Champaign
16-Aug-2000


Page: 1 2

Related biology news :

1. Simple sugars make cell walls like steel
2. Beyond biology: Simple system yields custom-designed proteins
3. Simple rules predict the outcome of predator-prey struggles
4. Simpler HIV drug regimen may improve results, Science study on monkeys suggests
5. Physicists Find Simple Solution To Great-And-Small Mystery
6. Simple Chemical Switch Steers Migrating Neurons
7. NYU Researchers Develop Simple, Predictable And Precise Technique For Arranging DNA Molecules Into Two-Dimensional Crystals
8. Bug Experts Latest Books Feature Simple Language, Vivid Photos
9. New Herpesvirus Receptor Discovered That Allows Entry of Both Herpes Simplex-1And -2 And Animal Herpesviruses Into Human Cells
10. Liquid Crystals Light Up Simple Chemical Test
11. Argonne Researchers Develops Simple, Inexpensive Method For Cleaning Industrial Waste Streams

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:11/15/2018)... (PRWEB) , ... November 14, 2018 , ... ... genetics testing lab, will present new scientific evidence on gene-disease relationships and how ... Annual Meeting to be held in Atlanta, November 14-17. , Ambry has ...
(Date:11/13/2018)... ... November 13, 2018 , ... Pharmafusion LLC announced ... featured presenter at the upcoming CBI Gross-to-Net (GTN) Summit in Philadelphia on Thursday, ... November 16, where conference attendees will have the opportunity to “test drive” the ...
(Date:11/13/2018)... (PRWEB) , ... November 13, 2018 , ... ... 2x light systems for controlled-environment cultivation applications. VYPR 2 is well suited for ... herb, cannabis, and ornamental growing markets. , “As an all-purpose light which ...
Breaking Biology News(10 mins):
(Date:11/15/2018)... SAN FRANCISCO (PRWEB) , ... November 14, 2018 ... ... Indiegogo campaign, bringing the world’s first self-learning snore-reduction mask to the public. It ... to a poorer quality of sleep for themselves and their partner. The resulting ...
(Date:11/13/2018)... ... November 13, 2018 , ... Aditya Humad, Managing Partner ... week that asserts it is still trending upward with growing valuations based on ... describes market consolidation, pricing pressure and increased competition as reasons often cited by ...
(Date:11/9/2018)... ... November 08, 2018 , ... ... Valenzuela, PhD, co-Founder, Chief Executive Officer and President of Andes Biotechnologies, to its ... the world, Dr. Valenzuela brings to uBiome expertise on the genetic studies of ...
(Date:11/7/2018)... Mass. (PRWEB) , ... November 07, 2018 , ... ... system for algae at AzCATI, the Arizona Center for Algae Technology and Innovation at ... facilitate process development and trials for those involved with algal and predator control applications. ...
Breaking Biology Technology:
Cached News: