Add to favorite
Subscribe to our Newsletters Subscribe to our Newsletters Get Daily Updates RSS

Electronic Nose for Healthy Lifestyle
February 26, 2008 21:49

Scientists from Russian city of Voronezh have developed so-called electronic nose a device, which can distinguish natural ingredients (fruits and berries) from artificial flavours in dairy products by smell. This new device has finest olfaction due to a system of piezoelectric sensors, and special software helps the nose to distinguish and remember various smells.

Requirements to some food products are really strict baby nutrition and diet products are considered to be of highest quality, thus making these products more expensive. Unfortunately, some dishonest food producers substitute costly natural fruit ingredients with cheap imitations, which often arent mentioned on products label. Evidence for presence of such substitutes is very hard to find, because tasty natural aromas are usually complex mixtures of highly volatile substances of various chemical origin, thus identifying it with common chemical methods can be a problem. The only solution to the moment was a professional advice from experts.

New Russian development offers quick and simple solution to described problem. Of course, it wont make natural strawberry jam from red-colored strawberry-flavored apple puree, but it can distinguish one from another without any time-consuming sample preparation and identification of components. Said device works similar to human nose.

Most important part of the device is a number of several non-specific sensors. Sensors consist of quartz plates, coated with a specific substance. This substance adsorbs molecules of a smell of interest, and plates gain additional weight. Then a generator initiates oscillations of the plate, which now contains unknown molecules (usually oscillation frequency is about 8-10 MHz). Oscillation parameters will depend on plates weight a perfect technique to make weighing scales for nano-amounts out of the plate. These weighing scales are able to tell how many object molecules one or another coating absorbs.

Combination of several sensors with various coatings results in a specific response on a given smell. Other smells wont have any effect on the system, or their response would be totally different. All we have to do now is teach our system make a database of certain response on a certain smell and sensors will correctly identify smells (or gases) we are interested in.

All this makes counterfeits tremble. Scientists claim synthetic flavors smell completely different from natural fruits and berries, and Russian electronic nose allows telling whether delicious smell of yoghurt is natural or artificial.

Moreover, similar electronic nose can tell whether dairy products are fresh. Sometimes expiry date isnt reached, but milk is obviously sour. Sometimes you cannot tell whether yoghurt is edible. In case this product is made for sick children or those on diet nutrition, one should be absolutely sure food is fresh. Russian development helps to avoid said problems, since it can say how fresh a product is due to a number of chemical transformations taking place in dairy food during its shelf life. Scientists claim they developed a system, much more sensible that human nose, which can warn about non-edible products, when their smell seems to be normal.

    Russian Science News

Kizilova Anna


Next Previous

You might also find interesting:

Nitrogen Oxide as Metastases' Satellite Chocolate Can Harm Your Health Never Hide From The Rain Under The Fir Tree Did Nobel Prize in Physics Go to Wrong Scientists? Unparalleled Plutonium Purification Method Introduced in Russia

Comment on our site

RSS   twitter   facebook   submit

Bookmark and Share

search on the map
Coca-Cola  Archeology  Baikal  Russian regions  Russian Dances  skiing in Russia  Kazan Fifa Russia   LGBT in Russia  helicopter tours  Russian Railways  Vnesheconombank   Martial Arts  S7 Airlines  Exhibitions in Moscow  Recipes of Russian Dishes  Rostov Region  Concerts in Kazan  Mercedes-Benz Fashion Week Russia  IMAX  Russian Arts and Crafts  Buryatia  Erik Bulatov  Arctic Floating University  St. Petersburg  Russian Cinema  Russian Book of Records  mixed rally  Auchan  Krasnodar  Moscow  Russian GDP forecast  Russian tourism  Festivals in Moscow  Russian oil companies  Murmansk Region  Astrakhan Region  Exhibitions in Saint Petersburg  Russian Discoveries  Russian army  travel to Russia  Akhmatova  physics  Olympics 2012  Perm  Tula  ROSCOSMOS  MN17 Crash  International space station  Fishers Day  Russian business 

Travel Blogs
Top Traveling Sites