Sentences with word «odorant»

However, the researchers did not find any evidence for an olfactory system which is based on odorant receptors in the most basal insect, the jumping bristletail.

You can read the article Multivariate prediction of odour from pig production based on in - situ measurement of odorants in the scientific journal Atmospheric Environment.

For the first time is has been demonstrated that measurements of odorants in the air may be an alternative to dynamic olfactometry that can be applied for measuring odour from pig houses and the effects of odour abatement technologies.

For example, based on the perception of the hundreds of odorant molecules found in coffee, the piriform cortex would be able to recognize a single odor, that of coffee.

Whether olfaction recognizes odorants by their shape, their molecular vibrations, or both remains an open and controversial question.

Bargmann provided the first evidence showing that the type of odor response in C. elegans — attraction or repulsion - was governed not by the specific odorant receptor, but by the neuron expressing it.

The scientists tested the response of these mosquitoes to skin odorants by placing them in a wind tunnel with a plate of glass beads that had been worn in socks for several hours to give them the scent of human foot odor.

Important advances have included the discovery of the first evidence that the odour response is governed by neurons, of the intracellular signalling pathways between odorant receptors and sensory neurons, and of specific neurons, receptors and neurotransmitters involved in behaviour adaption following experience.

Transcriptomic and Proteomic Profiling Revealed High Proportions of Odorant Binding and Antimicrobial Defense Proteins in Olfactory Tissues of the House Mouse — Barbora Kuntová — Frontiers in Genetics

Then, as now, the prevailing notion was that the sensation of different smells is triggered when molecules called odorants fit into receptors in our nostrils like three - dimensional puzzle pieces snapping into place.

The sensors, called odorant receptors, are so sensitive to the chemical makeup of incoming odors that just a slight difference turns a smell from sweet to rancid.

It remains to be seen how broadly useful such programs will be, but one hope is that such algorithms may help fragrancemakers and food producers design new odorants with precisely tailored scents.

«We were quite surprised that by silencing just this single odorant receptor, flies could no longer localize their preferred egg - laying substrate.»

«A combination of between just few key odorants creates an authentic perception of odors.

Drosophila appears able to recognize the presence of deuterium in odorant isotopomers by a vibrational mechanism [12].

By genetic manipulation, Bargmann and her team swapped the receptors for two different odorants between two neurons, and produced opposite effects to those that normally occur — a receptor for an attractive odor, now on a neuron that usually responded to noxious odors, caused worms to move away from the attractive odor source.

Another method is to analyse the air to identify odorants that may cause obnoxious odours.

A convenient way to address it is to test for odor character differences between deuterated and undeuterated odorant isotopomers, since these have identical ground - state conformations but different vibrational modes.

This was the first evidence that neurons rather than the receptors determine odorant responses.

A study published in 2004 in Nature Neuroscience, for example, found that people could not discriminate between two such odorants.

This latest smell prediction effort began with a recent study by olfactory researcher Leslie Vosshall and colleagues at The Rockefeller University in New York City, in which 49 volunteers rated the smell of 476 vials of pure odorants.

For example, using solvents or a technique called solid - phase micro-extraction, Preti pulls odorants from an underarm pad fitted to a subject.

Competing interests: The Weizmann Institute has filed a patent on «predicting odorant pleasantness with an electronic nose» as described in this manuscript.

Because odorants like acetophenone and d - acetophenone mainly differ in their vibration patterns, the most plausible explanation, he says, is that flies can «smell molecular vibrations.»

In behavioural experiments, consequences to single animal performance in learning and memorizing odorants will be verified.

The primary aim was to develop a model to measure the concentration of odorants based on on - site measurements.

He has also uncovered a parallel non-receptor pathway that detects odorants that can be absorbed through the membrane into a cell.

Zwiebel and colleagues scanned the mosquito genome looking for genes similar to those that generate fruit fly odorant receptors, proteins that project from nerve cells and initiate a biochemical cascade when they encounter certain molecules in the air.

The team performed a series of tests, including comparative Aroma Extract Dilution Analysis (AEDA) as well as sensory evaluation by a panel of 10 participants who had received extensive training in identifying different wine odorants.

The problem is that our diet, medications, toiletries and other factors make it difficult to discern natural scent from manufactured odorants.

The fear of obnoxious odorants may also be a hindrance if pig farmers want to expand their herds.

To this purpose, the scientists used a newly developed mobile odour laboratory equipped with a PTR - MS for measuring odorants and an olfactometer.

The scientists also aimed to identify significant odorants in order to assess odour emission from the pig facilities as well as the effect of technologies that reduce odour problems.

14 Penn State engineers are trying to design an artificial sniffer based on the fluid mechanics and odorant transport of the canine nose.

In vivo calcium imaging of the flies» brains stimulated with citrus enabled the researchers to identify the corresponding odorant receptor.

Odorants induce a rapid and transient elevation of adenosine 3», 5» - monophosphate (cAMP), which activates a nonspecific cation channel and produces membrane depolarization.

Most scents are composed of many odorants; a whiff of chocolate, for example, is made up of hundreds of different odor molecules.

The findings also lay the scientific groundwork for the next generation of aroma products, which use the potential of optimized biosynthetic pathways in plants for industrial - scale production of high - quality food odorants.

The notoriously strong winds at Aliso Canyon carried the natural gas and its added odorant to the nearby Porter Ranch neighborhood, leading to thousands of families evacuating their homes.

What is really happening, Turin posited, is that the approximately 350 types of human smell receptors perform an act of quantum tunneling when a new odorant enters the nostril and reaches the olfactory nerve.

This latest odorant mapping will also enable more precise natural simulation of odors.

This study demonstrates, for the first time, that the mammary pheromone helps pups learn other odorants, says neuropsychologist Peter Brunjes of University of Virginia in Charlottesville.

In one recent study, 17 patients with moderate, persistent asthma took whiffs of a nonirritating odorant.

Differential Electrophysiological Responses to Odorant Isotopologues in Drosophilid Antennae

The correlation between the eNose pleasantness prediction values of 22 odorant mixtures (essential oils) and the values obtained from native Ethiopians.

A. Odorant - specific pleasantness ratings for native Ethiopians (blue), native Israelis (brown), and eNose (pink).