Tag: "sniff" at biology news

Spying on the inner life of a cell - new nanosensors a body can live with

...oshell membranes, and send them inside the cell to sniff out specific substances. "What we're trying to do at this point is incorporate ion channels as detectors," Aspinwall said. An ion channel is a molecule that moves a specific kind of ion by opening or closing in response to the presence of that ion or...

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

...ty have put a controversial theory of smell to the sniff test and have found no evidence to support it. They say their study, published in the April issue of Nature Neuroscience, should raise firm doubts about the validity of "vibration theory," which states that molecules in each substance generate a spec...

Who moved my cheese!?

...hat enable rodents to identify an odor in a single sniff are probably similar to those that help us take in an entire visual scene in a single glance. Moreover, the brains of both rats and humans display the same kind of rhythmic, information processing activity called a theta cycle, which controls many th...

Four gene 'micronet' found to regulate social behavior in female mice

...nd you introduce a second mouse, the resident will sniff and investigate," says Choleris. The time that the resident mouse spends investigating is measured. The intruder mouse is removed from the cage and replaced after 15 minutes. The researchers repeated this four times, and the amount of time the reside...

How humans lost their scents

...te with their best friends. Dogs can be trained to sniff out drugs and explosives or to track down a crime suspect by smell. Why can't we do the same? Scientists from the Weizmann Institute of Science and the Max Planck Institute for Evolutionary Anthropology propose an explanation for this ancient quandar...

Anthrax threat needs aggressive government action plan, say researchers

...he attack was detected by biosensors devices that sniff out anthrax spores. Although the federal government is spending many millions of dollars to develop biosensors, their use alone is insufficient and could create a false sense of security, says Wein. We would also need aggressive distribution of proph...

First molecule discovered that directs nerve cells to connect with each other

...gnal SYG-1. "The pre-synaptic neuron uses SYG-1 to sniff out the location of the guidepost cell, and then it organizes the synapse around the guidepost," Bargmann explains. "That ensures that it always makes the right connection in the right place." She expects that SYG-1 likely plays a similar matchmaking...

How the nose knows a rose-or a mate

If you sniff a rose this Valentine's Day, your brain will recognize almost a hundred different molecules that collectively give the flower its heady scent-but how? Scientists are now discovering how the brain identifies odors and their mysterious counterparts, th...

Scientist detail how brain regulates sensory information

...nse of texture. If a new odor permeates a room, we sniff to sample and identify the smell. In all of these processes, we separate the sensory input from the motor component that directs and defines the sensation." In their experiments, the scientists discovered the specific mechanisms by which sensory sig...

Strange signals from breastfeeding

...nal two months, some women were randomly chosen to sniff pads with the breastfeeding compounds, while others continued with the control scent. Each day the volunteers measured their temperature, took a urine sample and recorded sexual activity. Last year, Mennella's group showed that exposure to breastfe...

UMass microbiology team probes bacterium's surprising survival tactics

...ve a built-in sensor that allows it to essentially sniff out metals, said Lovley. And if a source of iron or manganese is not nearby, the bacterium which was previously believed to be incapable of movement can essentially decide to grow flagella, the whip-like structures that enable bacteria to swim. Sc...

Some animals can recognize degree of kinship by scent

...d standard in olfactory behavior studies. A quick sniff would be all a squirrel needed to recognize the sm...igators conducted scent studies and asked women to sniff T-shirts that had been worn by men either genetically similar or dissimilar to them, most women pref...

Scent of a lobster

...rd figure that a lobsters extraordinary ability to sniff out all kinds of odor trails in the water is just what the Navy would like an unmanned vehicle to be able to do. Mimi Koehl at University of California, Berkeley and her colleagues are studying the small hairs on the lobsters olfactory antennules. T...

Lobster sniffing: how lobsters' hairy noses capture smells from the sea

...ails the sophisticated way in which spiny lobsters sniff their way around a watery world, and may provide s...man-made antennae." Lobsters and other crustaceans sniff by flicking a pair of antennules, dragging them through the water to bring chemosensory hairs on the...

Scientists study how the lobster's nose knows

...e covered with arrays of odor-sensitive hairs - to sniff out odors. The findings, which will be published i... that the rapid downstroke at the beginning of the sniff turned the antennule into a ``sieve,`` allowing water to flow between the aesthetascs and bringing t...

IIT develops technology that may help doctors identify blood pathogens faster

...o take blood from a patient, and use the e-nose to sniff out the pathogens right away," says Morong. "But without growing the pathogen up, its hard to detect any gases."...

Pandas use sexy smells to attract partners

...y think that giving these rare animals a chance to sniff each other's scents before they meet could help persuade them to mate in captivity. At the Wolong Breeding Center in Sichuan province, China, behavioural biologist Ronald Swaisgood and his colleagues allowed pandas to visit each other's empty enclos...

Simple and inexpensive, an artificial nose senses smell by seeing colors

Imagine a small slip of paper that can sniff out odors such as sour milk, illegal drugs, environmental pollutants, poisonous gases or deadly toxins simply by changing color. As reported in the Aug. 17 issue of the journal Nature, chemists Kenneth Suslick and Neal Rakow at the University of Illi...

Integrative approach to studying penguins, cockroaches and little hairy noses makes comparative biomechanics group at UC Berkeley the nation's best

...lick antennules bearing tiny chemosensory hairs to sniff the water. "All of us in the biomechanics group are at the interface between biology and engineering," she said. "While engineers need to design structures to perform specific functions, we are studying organisms that already have a structure, and o...

Creating a standard spectrum of smell

... how do you distinguish between those with perfect sniff pitch and those with none? Cornell University foo...octoral candidate in food chemistry, is developing sniff standards in the laboratory of Terry Acree, a Cornell professor of food science, at the university's...

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