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Tag: "distinct" at biology news

First human study confirms that immune cells can be a primary cause of bone loss in gum disease

...erentiated B cells) makes periodontal disease very distinct from other chronic infectious diseases. B cells are known to produce a weapon (antibody) that normally attacks bacteria and protects our body from bacterial infection. As a consequence of dense infiltration of B cells found in the gum, periodontally ...

How satellite tracking revealed the migratory mysteries of endangered Atlantic loggerhead turtles

...wn, as the team discovered the turtles adopted two distinct approaches to finding food, linked to their size. Previously it was thought that hatchlings left the coastal region to forage far out at sea before returning, later in life, to find food closer to shore. However the new findings show that the oceani...

A dichotomy in migration patterns found for sea turtles in east Atlantic

...r open ocean along the African coast and exhibit a distinct feeding strategy. Interestingly, while adults comp...c occupy very different habitats and undertake two distinct foraging strategies. The differing strategies correlate with body size, which may be linked tothe ...

Connect the Quantum Dots

...t within the width of a thumb. By virtue of their distinct colors, quantum dots have quickly found their way into homes in many electronic lasers including the new PlayStation 3 and high-definition DVD players. Nanotechnology, the understanding and control of matter at dimensions of roughly 1 to 100 nanomet...

Researchers link two more genes to sudden infant death syndrome

... RyR2 was targeted because of its involvement in a distinct genetic heart rhythm disease known as catecholaminergic polymorphic ventricular tachycardia (CPVT). "For a parent whose infant died suddenly and mysteriously even five years ago, we were essentially unable to provide them with a cause and would ofte...

'Sticky' mice lead to discovery of new cause of neurodegenerative disease

...s in executing the genetic instructions, which are distinct from known causes of neurodegenerative diseases, such as Alzheimer's and Huntington's diseases. HHMI investigator Susan L. Ackerman and her colleagues reported their findings in an August 13, 2006, advance online publication of the journal Nature...

Study details hepatitis C ability to block immune system response

...ctions, many human pathogenic viruses have evolved distinct strategies to inhibit the early signaling events leading to interferon production. HCV is no different. "We have previously demonstrated that many interferon stimulated genes with antiviral activity are induced in the liver during HCV infection," sa...

Cells use mix-and-match approach to tailor regulation of genes

...s, trios, and combinations of up to 13 to regulate distinct sets of genes. The researchers, led by UCSD bioengineering professor Trey Ideker, reported a list with 363 combinations of 91 central transcription factors that regulate a large proportion of genes in the yeast genome. The team used rigorous statist...

When it comes to gene transcription, random pauses aren’t quite so random, study finds

...ries," Herbert explained. "That is, they exhibit a distinct behavior--they tend to pause more or less, but they don't seem to remember having paused." Why does RNAP make these fitful stops and starts? "No one really knows what all these ubiquitous pauses are doing nor what really causes pauses. They may be ...

Scientists solve sour taste proteins

...). Each taste bud on the tongue contains separate, distinct subsets of cells that specifically detect each taste -- sweet cells respond to sweet substances, bitter cells to bitter substances, and so on. Taste receptors, proteins on the surface of these cells, are responsible for detecting the "taste" of a par...

Transgenic goat's milk offers hope for tackling children's intestinal disease

...cterial makeup of the digestive tract in these two distinct animal models," Maga said. "It is likely that the differences observed in the two species were due to the fact that goats, being ruminants, have a different digestive system and different collection of bacteria than do the pigs, which have only one s...

Triple threat polymer captures and releases

...ylene glycol -- and lets them phase-separate into distinct domains, one interspersed in the other. A chemical process called crosslinking then solidifies the mixture, thus creating a heterogeneous coating that, upon close examination, reveals treacherous nanometer-sized terrain composed of mountains and vall...

Dragonfly migration resembles that of birds, scientists say

... New Jersey. "The dragonflies' routes have showed distinct stopover and migration days,just as the birds' did," said Wikelski, an associate professor ofecology and evolutionary biology. "Additionally, groups of both birds and dragonflies did not migrate on very windy days and only moved after two successiven...

Just like us, social stress prompts hamsters to overeat, gain weight

... trying to complete a major project at work. It is distinct from traumatic stress, such as suffering the death of a loved one. Traumatic stress typically dulls the human appetite, said Bartness, the study's senior researcher and an authority on obesity. In the U.S., where food is plentiful and relatively che...

Electric fish in Africa could be example of evolution in action

...cause all of the 20 or so species of mormyrid have distinct electric signals, Arnegard believes the different ...or some reason, begin to mate selectively and form distinct groups and, ultimately, separate species. This so-called sympatric speciation is more controversial ...

Epstein-Barr virus might kick-start multiple sclerosis

...these were all normal in MS patients, indicating a distinct role for EBNA1 in the disorder." The team then wanted to determine which portion of EBNA1 the T cells were recognizing. Generally, immune cells recognize one small, specific part on a protein, called an immunodominant region. Earlier evidence had po...

Where we change our mind

...sk parameters that may be represented in spatially distinct brain regions," they concluded. ...

With record resolution and sensitivity, tool images how life organizes in a cell membrane

...different proteins in a section of compositionally distinct fatty membrane have been called ''lipid rafts.'' Just as a raft is a bunch of logs associated because a rope binds them together, allowing it to perform the function of floating, proteins associated with other proteins on a lipid raft may perform fu...

Researchers find that bumblebees' flower choice matters

... it is documentable. "Bumblebees definitely have distinct foraging patterns, both among species and even individuals of a single species," Karron says. In fact, some of the many different behaviors lead to far more fruitful propagation than others. To understanding foraging patterns, the team must manipu...

Fire ant-attacking fly spreading rapidly in Texas

...t phorids specialize on small or large workers, on distinct chemicals laid down by the ants on trails, on time of day and on season and so forth. Our goal is to copy what we believe to be nature's complex control system." Gilbert and his colleagues are looking at the fire ant-fly relationship in parts of Ar...

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