Tag: "smells" at biology news

Essential smell gene may provide key to new insect repellents

...lling 2-phenylethanol and methyl salicylate, which smells like wintergreen. They attached a tiny recording electrode to the antenna of a fly, then puffed the odorant molecules into the air nearby. In normal flies, a dip registered on the electroantennogram (similar to the chart that records heartbeats on an...

A fly's taste experience is much like our own

... Odor receptors provide the fine discrimination of smells that allows us to distinguish foods and enjoy eating. "The simplicity of the gustatory map of the fruitfly indicates that it will be a model system to examine how the brain translates chemical cues in the periphery into taste perception and behavior,...

Rockefeller University scientists take on controversial 'vibration theory' of smell

... is that the shape of a chemical determines how it smells - much the same way as taste works. However, at p...d that if two different chemicals (guaiacol, which smells smoky, and benzaldehyde, which smells like bitter almond) were mixed together, they would smell like...

Ontario researchers see increase in taste and odour-causing algae problems

...s that water in their lakes periodically tastes or smells bad. A common cause of such problems is blooms of ...t implications for water quality." Lake water that smells and tastes foul can be traced to a variety of sources, including chemical pollution and dead fish, b...

JCI table of contents, February 2, 2004

...cid metabolism, and is characterized by urine that smells like maple syrup. In the February 2 issue of the Journal of Clinical Investigation, Yuan-Tsong Chen and colleagues from Academia Sinica, Taiwan, screened families of mutant mice for disorders of amino acid metabolism using tandem mass spectrometry (M...

Chimp vs. human DNA: what's in the 1% difference

...key differences are how humans and chimps perceive smells and what we eat. A massive gene-comparison project involving two Cornell University scientists, and reported in the latest issue of the journal Science (Dec. 12, 2003), found these and many other differences in a search for evidence of accelerated ...

Lifestyle accounts for difference in chimp, human genome

...key differences are how humans and chimps perceive smells and what we eat. A massive gene-comparison project involving two Cornell University scientists, and reported in the latest issue of the journal Science (Dec. 12, 2003), found these and many other differences in a search for evidence of accelerated ...

Who moved my cheese!?

Rats inhabit a world of smells far beyond our poor powers to discriminate. Thousands of odors that smell the same to us, or that we cannot perceive at all, are quickly recognizable as distinct and meaningful odors to rodents and other animals in which the Nose Knows. But just how ...

Social insects point to non-genetic origins of societies

...f dirt there and the other termite comes along and smells that a termite put her piece of dirt there, so she does too, instead of somewhere else. At first it's random and termites are putting their dirt in different places, but then one place becomes the dominant location and the structure goes from there....

The stinky smell of success of Ted the Titan: a tale from Chemical & Engineering News

...mpounds are] sulfur heterocyclic amines because it smells like three dead sheep." A number of plants around the world have evolved using this strange system of attracting flies, rather than bees. These stinkers pull in the flies, which are in a "euphoric, confused state" looking for places to deposit their ...

'Work stinks': It's more than just a slogan among ants, researchers find

...extraordinarily fine-tuned to differentiate subtle smells produced by hydrocarbons - a naturally occurring family of chemicals that includes such well-known compounds as methane and propane. The waxy outer surface of an ant's body contains about 25 different hydrocarbons, which emit slightly different odors...

Yellowstone wolves, grizzlies and moose 'dysfunctional' study says

...ed responses and often fled the area when predator smells and sounds were present. Berger says that such a reaction indicates the type of response consistent with animals living in an environment containing large predators. According to Berger, the scents of predators are one of several indicators that he...

How the nose knows a rose-or a mate

...se's pheromone cocktail. Researchers say that most smells hover about 10 inches off the ground, placing the ...ong those of most other mammals. Nonetheless, when smells do reach the neurons inside the nose, the human brain can distinguish from among the thousands of ch...

Facial markings help paper wasps identify each other

...ainted wasp with altered markings and thinks, 'She smells right, so she must be a nest mate, but if I don't recognize her, is she a threat to my rank?' So the wasp is aggressive," says Tibbetts. "Whenever the nest mate then sees the altered wasp, she will know who it is and think, 'No need to worry, it is j...

Your brain is teaching your nose new tricks, say UC Berkeley researchers

...fornia, Berkeley, has determined that we learn new smells in an area of our brains, not just in our noses, which have neural receptors previously thought to be solely responsible for a person's ability to detect new odors. This finding has prompted the team, led by graduate student Joel Mainland and Noam So...

Bloodworm's way with copper likely provides paradigm for new materials

...odworm lives in the gravel of marine sediments and smells out its prey, explains Waite. "The worm is going to miss its prey a fair number of times," he said. "And that means that its jaws are being abraded by gravel. So they need to be made of more robust material than the jaws of the clamworm, which is ...

Strange signals from breastfeeding

...l exert a subtle influence over us. In the study, smells associated with breastfeeding increased feelings of sexual intimacy in childless women volunteers. Why this should be so is a mystery, but the researchers suggest it may be a way that women signal to each other that the environment is a good one in w...

Biodiversity crucial to Earth's ecosystems

... population, but it results in drinking water that smells and tastes bad for the City of Chicago. This is just one effect from a chain of events that happens in this particular complex ecosystem, Leibold said. "When you pluck a species out of an interacting food web, the results are going to have a cascadi...

Johns Hopkins scientists find brain's nose plug

...r receptor cells -- neurons whose job is to detect smells and send that information to the brain as an electrical signal. The "nose" is really a channel in the neurons' membrane that opens when an odor is presented and closes as the neuron becomes desensitized to that smell. By measuring the signals from ...

Microbe genes help scientists reconstruct animal origins

...ls. In other words, it looks like, walks like, and smells like genes that we are familiar with but that, apparently, evolved at the base of the node where animals split off the tree." The identification of a common ancestor to all animals is important, according to Carroll, because it helps fill in the big...

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