Navigation Links
Sweet smell
Date:9/18/2007

What makes one smell pleasant and another odious? Is there something in the chemistry of a substance that can serve to predict how we will perceive its smell? Scientists at the Weizmann Institute of Science and the University of California at Berkeley have now discovered that there is, indeed, such a link, and knowing the molecular structure of a substance can help predict whether we will find its smell heavenly or malodorous.

In sight and hearing, for instance, our perceptions are determined by the physical properties of waves the length of light waves in sight, and the frequency of sound waves in hearing. But until now, there was no known physical factor that could explain how our brains sense odors. The new study, conducted by Prof. Noam Sobel of the Institutes Neurobiology Department and his colleagues, represents a first step in understanding the physical laws that underlie our perception of smell. Their results appeared last week in the Journal of Neuroscience.

To identify the general principles by which our sense of smell is organized, the researchers began with a database of 160 different odors that had been ranked by 150 perfume and smell experts according to a set of 146 characteristics (sweetish, smoky, musty, etc.). These data were then analyzed with a statistical program that analyzed the variance in perception among the smell experts. The scientists found that the data fell along an axis that describes the 'pleasantness rating' of the odors running from 'sweet' and 'flowery' at one end to 'rancid' and 'sickening' at the other. The same distribution along this axis, they discovered to their surprise, closely describes the variation in chemical and physical properties from one substance to another. From this, the researchers found they could build a model to predict, from the molecular structure of a substance, how pleasing its smell would be perceived.

To double check their model, Sobel and his team tested how exper
'/>"/>

Contact: Yivsam Azgad
news@weizmann.ac.il
972-893-43856
Weizmann Institute of Science
Source:Eurekalert

Page: 1 2

Related biology news :

1. Bad aftertaste? New sensory on/off switch may cure bane of artificial sweetener search
2. A sweet solution for Alzheimers disease?
3. Bitter or sweet? The same taste bud can tell the difference
4. UW-Madison scientists zero in on drugs sweet spots
5. Sweetgum tree could help lessen shortage of bird flu drug
6. Sweet water taste paradoxically predicts sweet taste inhibitors
7. Scientists seek to unwrap the sweet mystery of the sugar coat on bacteria
8. Healing honey: The sweet evidence revealed
9. Attacking cancers sweet tooth is effective strategy against tumors
10. Uncovering DNAs sweet secret
11. A sweet step toward new cancer therapies
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/6/2014)... metastasis, yet progress in preventing and treating migratory ... particularly challenging to design drugs that work against ... biology at Harvard Medical School. , "Unfortunately, ... metastasized." , Gujral and colleagues have now identified ... understand how metastasis begins. Their findings may also ...
(Date:11/5/2014)... show great diversity in their ability to identify scents ... differ in their perceptual evaluation of odors, with women ... , Sex differences in olfactory detection may play ... connected to one,s perception of smell, which is naturally ... superiority has been suggested to be cognitive or emotional, ...
(Date:11/4/2014)... study examining only marketing directed at children on ... has found that the majority of black, middle-income ... marketing tactics. , Authored by Arizona State University ... is the first to examine the use of ... fast food restaurants and its relationship to demographics. ...
Breaking Biology News(10 mins):Migration negation 2Migration negation 3The female nose always knows: Do women have more olfactory neurons? 2Fast food marketing for children disproportionately affects certain communities 2Fast food marketing for children disproportionately affects certain communities 3
... Aug. 18 Central Florida based locksmith,and safe ... its strategic,alliance with security firm Absolute Access and ... well as all customer service,functions, will be offered ... complete with a new office and showroom location ...
... reported that children with autism have a wide range ... a simple genetic test to identify the disorder. Now, ... reveal correlations in the facial features and brain structures ... enable them to develop a formula for earlier detection ...
... five faculty planning grants to develop long-term research programs ... for fresh water. "Fresh water is crucial to ... than a billion people have no access to safe ... sanitation facilities," said Woods Institute Senior Fellow Richard Luthy, ...
Cached Biology News:Cuellar's Safe and Lock Announces Strategic Alliance with Absolute Access and Security 2Researchers study facial structures, brain abnormalities to reveal formula for detection of autism 2New planning grants to fund research on freshwater issues 2New planning grants to fund research on freshwater issues 3
(Date:11/26/2014)... Nov. 26, 2014 The Alliance ... a survey of European physicians at the "1 ... and Biological Therapies" at the Spanish Ministry of ... by EuropaBio and the Spanish Bioindustry Association (ASEBIO), ... physicians from Spanish oncology and rheumatology societies, representatives ...
(Date:11/26/2014)... Winston-Salem, NC (PRWEB) November 26, 2014 ... Medical Advisory Board. PMG Research is a network of sites ... with access to over 2 million patient lives through its ... Research is comprised of 11 hub site locations in the ... , The first term of the board will ...
(Date:11/26/2014)... Silicon Valley Electronic Data Capture (EDC) provider ... , provider of clinical research and data management services ... to its CRO Partnership Program, Clinovo expands ClinCapture ... , “We have found Clinovo’s ClinCapture to exceed ... which is both user friendly and easy to deploy. ...
(Date:11/26/2014)... 2014 Global biostimulants market is ... at an estimated CAGR of 12.5%. In order ... products with least ecological impacts, farmers are looking ... boost crop yield more effectively & efficiently. Biostimulants ... improve the return on investments. , Leading companies ...
Breaking Biology Technology:ASBM Presents European Physicians Survey at Spanish Ministry of Health 2PMG Research Names Medical Advisory Board 2PMG Research Names Medical Advisory Board 3RPM Alliance Joins Clinovo’s CRO Partnership Program, Further Strengthening Its Presence in Southern California and India 22019 Biostimulants Market to Grow at a CAGR of 12.5% Says a New Research Report Available at RnRMarketResearch.com 22019 Biostimulants Market to Grow at a CAGR of 12.5% Says a New Research Report Available at RnRMarketResearch.com 32019 Biostimulants Market to Grow at a CAGR of 12.5% Says a New Research Report Available at RnRMarketResearch.com 4
... Netherlands, January 16 Today Top Institute,Pharma announces ... at the,development of a malaria vaccine. This TI ... from previous studies. The project aims to,develop a ... lives of,millions of people in developing countries, especially ...
... for the, Maintenance and Prophylactic Treatment of Asthma in Patients 12 ... ... ALVESCO(R) Will be Commercialised by ... Food and Drug Administration (FDA) approved ALVESCO(R),(ciclesonide) Inhalation Aerosol in the United ...
... ,Center of Excellence, Advancing Performance in ... Patient Outcomes, Costs and Convenience, COSTA MESA, Calif., ... today that it has completed the,previously announced acquisition of Neuro-Therapy ... announced,that Daniel A. Hoffman, MD has been appointed Chief Medical ...
Cached Biology Technology:Boost for Malaria Vaccine Development by Combining Strengths of Dutch and American Researchers 2Boost for Malaria Vaccine Development by Combining Strengths of Dutch and American Researchers 3Boost for Malaria Vaccine Development by Combining Strengths of Dutch and American Researchers 4ALVESCO(R) Gains FDA Approval for the U.S. Market 2ALVESCO(R) Gains FDA Approval for the U.S. Market 3ALVESCO(R) Gains FDA Approval for the U.S. Market 4CNS Response, Inc Completes Neuro-Therapy Clinic Acquisition; Names Daniel A. Hoffman, MD Chief Medical Officer 2CNS Response, Inc Completes Neuro-Therapy Clinic Acquisition; Names Daniel A. Hoffman, MD Chief Medical Officer 3
... to be able to handle larger sample volumes, ... well as interface with telemetry systems. The ... with dogs, pigs, and primates. The system ... and the computer can be located outside the ...
... laboratories working in a regulated environment, ... pipette calibration software that automates gravimetric ... a framework that meets todays regulatory ... a secure solution that includes a ...
... in plasma from juvenile or male fish is ... chemicals (EDCs) with estrogenic effects in fish. Quantification ... for the estrogenic effects of EDCs in fish. ... double-antibody immunometric (sandwich) EIA for analyzing Vtg in ...
... target for which no antibody exists? Having difficulty ... for a variety of pharmaceutical, biotech and academic ... our technology and expertise in antibody generation to ... patented RabMAb development technology , High affinity and ...
Biology Products: