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Tag: "tell" at biology news

Invasive species alter habitat to their benefit

...re all happening concurrently, so you can't really tell which is causing the other." Other factors may enter in. For example, human activity, such as the use of fertilizers and road salt and the suppression of natural wildfires, also may result in environmental changes that affect species diversity. "My...

Scientists solve sour taste proteins

...ld interpret the signals coming from the tongue to tell the difference between lemons and lemonade," Matsunami said. Future experiments using live animals as test models will be needed to answer remaining questions about taste sensation, he said. ...

Movie spies on malaria parasite's sneaky behavior

...ting a chemical "death signal" that would normally tell a macrophage to ingest it. "The parasite did not evolve this complex system for nothing," Ménard commented. "It is probably very important that the parasite not travel free in the liver." If researchers could interfere with the formation of the...

Loosen up, DNA: Leukemia gene changes genetic packaging

...n, can suppress tumor growth by keeping genes that tell cells to grow turned off. Li's paper goes one step further, identifying JAK/STAT, a known cancer-causing pathway in people, as one mechanism that has the ability to turn on sets of genes that have been silenced in this way. Scientists have thought ...

Leptin found to control appetite and limb development in frogs

...g the feeding behavior off, but it does apparently tell their bodies that they've had enough to eat now, and they can begin sprouting limbs. "Leptin gets a lot of attention for its role in food intake, but it's clear that it does lots of other jobs," he said. The hormone is known to be part of a family ...

Triple threat polymer captures and releases

...ant to know where they reside because that should tell us why this material is providing a favorable environment at room temperature but at elevated temperature for some reason everything is being expelled rapidly,," she said. "We don't know if there is some reorganization of the morphology of the ma...

Dragonfly migration resembles that of birds, scientists say

...y know very little about howanimals move. It could tell us a lot about the way speciesrespond to climate change and other disturbances. Becausethe economies of many nations are still largely agrarian, a betterunderstanding of how, say, locust swarms travel could assist us withmanaging both local agricultu...

Mice learn tasks that may help treat human psychiatric disorders

...cards as I turn them over, and then I'd ask you to tell me the numbers on the next cards I turn over. "But you might fail to tell me the numbers because you are continuing to pay attention to the previous set - the card suits. You...

Salk scientists get to the root of plant cell fate

... such an important change, it might be possible to tell a plant to make a leaf instead of a flower," says the study's lead author, Jeffrey A. Long, Ph.D., an assistant professor in the Plant Molecular and Cellular Biology Laboratory. "We can now think about plant development in a different way." The stu...

Research offers new hope for preterm babies

...s. We believe we will soon have the data that will tell us to what extent preterm babies can auto-regulate blood and oxygen flows in the brain. This will greatly assist in caring for these babies, particularly those needing treatment for low blood pressure," Dr Wong said. ...

'Smart' genetic therapy helps the body to heal itself

...ical Centre, The Netherlands, and colleagues, will tell the conference that the team of Dr. Judith van Deutekom in his department has discovered a promising genetic therapy for Duchenne muscular dystrophy (DMD). Using anti-sense molecules (small pieces of synthetic RNA that can bind to specific sequence...

The appearance of your hands can reveal your age, study finds

...According to the study, most people can accurately tell a person's age by viewing only their hands. "A primary motivation to have plastic surgery is to look and feel better, often by seeking a younger looking appearance. However, looking younger after your facelift or eyelid surgery can conflict with ag...

Eminent inventor of DNA fingerprinting gains new recognition

...ar of Russia? Jeffreys' technique was even able to tell us whether Dolly was in fact the clone of another sheep. "The new discipline of forensic molecular biology is therefore a direct outcome of Jeffreys' research, but his discoveries have also opened up other doors, for example the ability to determine...

Ghost protein leaves fresh tracks in the cell

... -- mostly epithelial -- trying to learn what cues tell spectrin where to assemble in cells. They use the fruit fly as their test animal because its genetic makeup has many striking similarities to humans. "In our study, we showed spectrin doesn't have to bind to ankyrin to do its job," said Dubreuil. "...

Eat less, weigh more? Enzyme makes lean mice 'susceptible' to dietary fat

... in ample supply, molecular signals from the brain tell cells in the body to store the excess energy by co...ciences at Hopkins. "The liver sure isn't going to tell you, it just keeps storing fat as long as the body is well fed." Instead, he notes, it is the contro...

Master planners in brain may coordinate other areas' roles in cognitive tasks

...n explains. "If you ask them how they are, they'll tell you, 'I'm fine,' but they won't tell you a story." "They seem to have problems voluntarily entering a task state," Dosenbach says. "They...

How does a zebrafish grow a new tail?

...hould be reproduced. These streams of signals also tell stem cells in adult organisms what functions to un...ke. Once tissue formation starts, something has to tell it to stop before growth gets out of hand. In the Dec. 21, 2006 online edition of the scientific ...

Far more than a meteor killed dinos

...dinosaurs did not leave a lot of fossils behind to tell the tale. "Dinosaur fossils are few and far bet...e at all times. In just a pinch of sediment we can tell you the age, the prevailing climate, the environment in which it was deposited and what happened. It...

'Fruit fly dating game' provides clues to our reproductive prowess

...dinosaurs did not leave a lot of fossils behind to tell the tale. "Dinosaur fossils are few and far bet...e at all times. In just a pinch of sediment we can tell you the age, the prevailing climate, the environment in which it was deposited and what happened. It...

Other patients bear the real cost of Herceptin

... we know,?say the authors. “We will be the ones to tell them they are not getting treatment that has been proved to be effective and which costs relatively little, because it is not the treatment of the moment.? These results are obviously not definitive, but illustrate the fundamental challenge facing ...

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