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odor in Biological News

Resilin springs simplify the control of crustacean limb movements

... its mouth. The flow created in this way mixes odor molecules in the water and thus enables better odor acquisition and sampling. It may also allow an ... mechanism; the currents created distribute odor molecules in the urine released into them and act ...

Taste, odor intervention improves cancer therapy, according to Virginia Tech, Wake Forest study

... may directly alter and damage taste and odor perception, possibly leading to patient ... of the types and causes of taste and odor dysfunctions so that they can develop treatments ... quality and treatment, as well as the taste and odor assessment of water, has expanded upon her ...

Neural mapping paints a haphazard picture of odor receptors

... a chemotopic order where cells handling similar odor responses are near each other," says Markus ... species, bundles of neurons from a given type of odor receptor -- known as glomeruli -- were found in ... expect that nearby glomeruli should have similar odor sensitivities," Meister says, "but we were ...

Emotion and scent create lasting memories -- even in a sleeping brain

... of noradrenaline also creates changes in the odor processing center of the brain, called the ... a strong memory about another, it is reliant on odor cues and noradrenaline. Both need to be present ... to see if these two elements noradrenaline and odor present at the same time were the key ...

Moths with a nose for learning

... cells occurred during the beginning and end of an odor pulse, with little to no spiking in between. ... The group found that the interval between the odor stimulus onset and sucrose reward was crucial to ... as well. Moreover, if the researchers used a long odor stimulus and administered the sucrose just after ...

What is wild? Odor attraction among different wildtype Drosophila

... ) show a highly selective behavior towards odor stimuli. A series of behavioral studies showed ... to fruity smells, and especially to single odor components. "These flies, which have only until ... host signals and do not just rely on one single odor that is stimulating their antennae. Moreover, the ...

Living fossils have hot sex

... named cycads: The plants heat up and emit a toxic odor to drive pollen-covered insects out of male cycad cones, and then use a milder odor to draw the bugs into female cones so the plants ... takes your breath away. Its a harsh, overwhelming odor like nothing you ever smelled before. Think ...

Genetic variant linked to odor perception

... researchers demonstrated that genetic variants of odor receptors within the nose determine how a particular odor is perceived. The researchers, led by Dukes ... We found that genetic variations of a specific odor receptor determine, to a significant degree, why ...

Gene determines whether male body odor smells pleasant

... on your genes. While many people perceive a foul odor from androstenone, usually that of stale urine or ... different variants of this receptor perceive this odor differently," says Vosshall. Although it has ... been suspected that the ability to perceive the odor of androstenone is genetically determined, this ...

American Chemical Society's Weekly Press Pac

... points to increased diabetes risk Pioneering odor tests on plastic water pipe Toward a new ... Aug. 23, 2:00 p.m., Eastern Time Pioneering odor tests on plastic water pipe Fruity plastic may ... of water sensory experts used to describe the odor of drinking water from the plastic piping that is ...

A breath mint made from... coffee?

... presented last month to members of the International Society for Breath odor Research in Germany by Yael Gov, a researcher in Prof. Rosenberg's ... bad bacteria In the laboratory, the team monitored the bacterial odor production of coffee in saliva. In the study, three different brands of ...

Bitter-tasting nectar and floral odors optimize outcrossing for plants

... to produce either nicotine or benzyl acetone; the latter has a sweet odor we know from cocoa beans and is similar to the smell of jasmine and ... transfer. Later in the year, moths visit frequently, attracted by the odor of benzyl acetone. The bitter taste of the nectar doesn't seem to bother ...

Duck-billed platypus genome sequence published

... ability to detect smells. Interestingly, platypus has about half as many odor receptors as do the mouse and other mammals. However, the researchers also ... experienced an expansion in the genes that code for a particular type of odor receptor, called a vomeronasal receptor. Researchers think the expansion ...

Insects evolved radically different strategy to smell

... steps to open a molecular gate nearby, signaling the brain that an odor is present. "It's that way in the nematode, it's that way in mammals, ... the activity of the ions from sending a signal to the brain that an odor is present. At the University of Tokyo, Vosshall's colleague Kazushige ...

Breath of the ocean links fish feeding, reefs, climate

... An ocean odor that affects global climate also gathers reef fish to feed as they ... and cool the Earth. These sulfur compounds are also known to serve as odor signals to marine organisms and are likely to play an equally important ...

New species of phallus-shaped mushroom named after California Academy of Sciences scientist

... "The mushroom emerges from an egg and elongates over four hours," says Desjardin, who is also a Fellow of the California Academy of Sciences. "Its odor attracts flies who consume the spores and disperse them throughout the forest." Desjardin and Perry named the new species after Drewes as an ...

New findings in taste and smell

... Recognizing Taste Stimuli below the Detection Threshold Differentiation and migration of neurons derived from the olfactory placode odor discrimination in mouse models of schizophrenia Taste responsive multipolar and elongated neurons in hamster nucleus of the solitary tract (NST) ...

NSF to fund water and environment technology center

... benefits for the community," Pepper said. "It focuses on research that provides good quality drinking water with acceptable purity, taste and odor characteristics, and is safe for human health and welfare." Much of the strength of universities is in faculty expertise, and research facilities ...

Host shift triggers cascading effect on ecosystem, research finds

... is happening right before our eyes in our own backyards." The scientists, led by Forbes, studied genetic differences, diapause length and fruit odor preferences for apple-associated populations of D. alloeum wasps collected from numerous Midwestern sites. They collected the same measurements for ....

Stress disrupts human thinking, but the brain can bounce back

... on attention-shifting tasks. In those experiments, rats learned to dig through a certain texture, like sawdust, in the presence of an irrelevant odor to find food; then the researchers made odor, rather than texture, the clue for finding the food and measured how long it took the rats to switch ...

'Fly guy' makes memory breakthrough

... but "equally repulsive" to the flies. One of the smells was paired to a foot shock, and the other was benign. From this, the flies learn to avoid the odor that leads to a shock, even in the absence of a future shock. This memory lasts for about a weekone-fifth of a lifetime to an average fruit fly. ...

Sniffing out a better chemical sensor

... are about 350 types of sensory neurons and many copies of each type; dogs and mice have several hundreds more types of sensory neurons than that. odor recognition proceeds in a step-by-step fashion where the chemical identity is gradually resolved: initial coarse information (e.g. ice-cream is ...

Cost-effective farm waste-to-energy technology focus of research

... The foundation prefers to remain anonymous. Farm waste management is a growing issue due to concerns over food contamination, pollutant runoff, odor and, most recently, greenhouse gas emissions. Petrochemical cost spikes, meanwhile, have added to farmers' costs for fertilizer and fuel. The MSU ...

Kazak apple research key to preventing blue mold

... As the familiar saying goes, one bad apple really can spoil the whole bunchgood fruit stored in containers with decaying fruit often absorbs a moldy odor and flavor. In a survey of the New York market from 1972 to 1984, blue mold caused by Penicillium expansum was the most damaging parasitic ...

1 missing gene leads to fruitless mating rituals

... DURHAM, N.C. Male fruit flies missing a gene for one particular odor receptor become clueless in matters of love, scientists at Duke University Medical Center have discovered. Because they lack the ability to read ...

Butter-flavored popcorn ingredient suspected cause of lung disease

... disease has been diagnosed in workers at popcorn factories. Researchers are focusing on diacetyl, the ingredient which is largely responsible for the odor and flavor of the butter in popcorn, according to an article published by SAGE in the current issue of Toxicologic Pathology. Workers making ...

Science expands Science Signaling, featuring research related to medical advances, and more

... DEET, which has been widely used in insect repellents for many years, blocks the insects' sense of smell. It seems that DEET functions by masking the odor that would attract the insect by blocking odorant receptors that require the olfactory co-receptor OR83b. M. Ditzen, M. Pellegrino, L. B. ...

Squirrels use snake scent

... snake skins, said Donald Owings, a professor of psychology at UC Davis who is Clucas' adviser and an author on the paper. They also pick up snake odor from soil and other surfaces on which snakes have been resting, and use that to apply scent. Other rodents have been observed using similar behavior. ...

Neuronal circuits able to rewire on the fly to sharpen senses

... of input that the system receives, said Nathan Urban, associate professor of biological sciences at Carnegie Mellon. When a stimulus such as an odor is encountered, many neurons start to fire. When many neurons fire at the same time, the signals can be difficult for the brain to interpret. During ...

Marine scientists warn human safety, prosperity depend on better ocean observing system

... over the POST array, resulting in more than 4 million detections of the movements and survival of the tagged animals. CoML Chief Scientist Ron odor says the endorsement and support of ministers in Cape Town is being urged for the Ocean Tracking Network, recently created to expand use of these ...

Human safety, prosperity depend on better ocean observing system: Scientists

... over the POST array, resulting in more than 4 million detections of the movements and survival of the tagged animals. CoML Chief Scientist Ron odor says the endorsement and support of ministers in Cape Town is being urged for the Ocean Tracking Network, recently created to expand use of these ...

Wake up and smell the sweat

... Some people are oblivious to the odor in the locker room after a game, while others wrinkle their noses at the slightest whiff of sweat. Research by Prof. Doron Lancet and research ...

American Chemical Society's Weekly PressPac -- Nov. 14, 2007

... publication. Consumers often turn to flavored chewing gum and mints to battle bad breath. However, those products only temporarily mask the odor of bad breath, which is caused by bacteria. Existing anti-bacterial products for bad breath are far from ideal, with some having side effects like ...

MIT's 'electronic nose' could detect hazards

... to different gases. This is similar to the way the human sense of smell works, Tuller explained. The way we distinguish between coffees and fishs odor is not that we have one sensor designed to detect coffee and one designed to detect fish, but our nose contains arrays of sensors sensitive to ...

Odd protein interaction guides development of olfactory system

... and normally they work together. The new mechanism, which directs the growth and development of tens of thousands of neurons that are vital to odor detection, instead involves a receptor that disables its protein ligand. The receptor is called derailed because its absence causes neurons to grow ...

Sweet smell

... is a certain amount of flexibility, and our life experience certainly influences our perception of smell, a large part of our sense of whether an odor is pleasant or unpleasant is due to a real order in the physical world. Thus, we can now use chemistry to predict the perception of the smells of new ...

Good earth: Brown chemists show origin of soil-scented geosmin

... PROVIDENCE, R.I. [Brown University] Brown University chemists have found the origins of an odor the sweet smell of fresh dirt. In Nature Chemical Biology, the Brown team shows that the protein that makes geosmin source of the good earth scent ...

Rhythmic breathing adapts to external beat through 'brain calculus'

... CAMBRIDGE, Mass, Sept. 12, 2007 The same kind of learning that allows humans to get used to a subtle touch or persistent odor may also help human vital signs adapt to medical interventions such as mechanical ventilation. The team, led by Chi-Sang Poon, a research ...

Advance in effort to fight malaria by tricking the mosquito's sense of smell

... as general-purpose olfactory organs and respond to a wide range of different chemicals and the proboscis that contains sensors designed for close-in odor and taste detection. The detailed map of the maxillary palp, which was published online in the journal Current Biology on Aug. 30, has determined ...
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