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Tag: "rules" at biology news

Immune system has evolved to prevent autoimmune disease

...dy, we first sought to understand the evolutionary rules that govern the way the immune system responds to an infection," Deem said. "With that framework in place, we identified a biologically-plausible strategy that would allow the immune system to react more quickly and with more effective antibodies. Ou...

Is it Possible to Change Prescribing Habits?

... of clinical-decision support system: the use of a rules technology to prevent drug–laboratory ADEs. The way the system worked was that providers ordered medications on a computer and an alert was displayed if a relevant drug–laboratory interaction existed. Comparisons were made between baseline and post-...

Why we give: New study finds evidence of generosity among our early human ancestors

...ners. Contingency is important because it sets the rules for who qualifies as a free-rider or cheater in exchange relations." A rigorous effort to quantify the extent and magnitude of different forms of payback in exchange relationships, the study, forthcoming in the February 2006 issue of Current Anthrop...

UK sperm donor crisis

...uit sperm donors. With the change in the anonymity rules coming we saw a sharp fall in numbers and a change in the profile of the applicants, perhaps reflecting the attitudes of different groups to anonymity. There was a significant increase in the number of men who had partners and, after the Department o...

Why the Amazon rainforest is so rich in species

... said: "It was a very simple molecular test but it rules out geographic isolation caused by past climate change as the main cause of species evolution. Instead the evolution of species must largely be caused by intrinsic biological features of each group of species." He added: "This research is helping us...

'Uniquely human' component of language found in gregarious birds

...sity of Chicago and co-author of the study. "These rules govern how to properly express yourself ?how to st...uences of rattles and warbles. They were applying rules to solve the task. The researchers also checked to see how the birds responded to "ungrammatical" s...

Junk DNA may not be so junky after all

..., sometimes referred to as "junk" DNA, follows few rules for organization and sequence patterns and therefore is more difficult to study. "The difficulty with human genetic approaches to common disease is that we lack the power to precisely localize DNA sequences that are associated with disease, often le...

Infused spleen cells found not to impact islet recovery and reversal of type 1 diabetes in mice

..., sometimes referred to as "junk" DNA, follows few rules for organization and sequence patterns and therefore is more difficult to study. "The difficulty with human genetic approaches to common disease is that we lack the power to precisely localize DNA sequences that are associated with disease, often le...

Diverse tropical forests defy metabolic ecology models

... remembers Muller-Landau. "If the proposed general rules truly applied, they would be tremendously useful - for example, they would help us predict how much above ground carbon is stored in tropical forests. There are some general similarities among sites in the tree size distributions, so it seemed plausi...

Cracking the genetic code for control of gene expression

....2% of the human genome. New codes and grammatical rules need to be resolved in order to understand the remaining 98.8% of the genome. It is evident that genes are expressed in tightly controlled spatial and temporal patterns but we do not know the code by which the expression is regulated. In this post-...

Scientists uncover rules for gene amplification

...tion of oncogenes. If scientists can determine the rules as to which segments of genetic material become am...rst step towards achieving this is to discover the rules that govern whether an amplification event is a double minute or a homogenously-staining region. It...

Cell phone emissions excite the brain cortex

...rcumstantiate these conditions and to provide safe rules for the use of this increasingly more widespread device." ...

Rice scientists unveil 'nanoegg'

...have to do with the odd and often counterintuitive rules that govern how light interacts with electrons at the nanoscale. "All metal particles have a sea of free electrons flowing continuously over their surface called plasmons," Nordlander said. "These plasmons slosh around constantly, just like waves i...

Scientists discover a genetic code for organizing DNA within the nucleus

...hicago, in cracking the genetic code that sets the rules for where on the DNA strand the nucleosomes will be situated. Their findings appeared today in Nature. The precise location of the nucleosomes along the DNA is known to play an important role in the cell's day to day function, since access to DNA ...

For diseases, when it comes to sharing a home, only close relatives will do

...ood (University of Virginia) asked whether similar rules apply to disease-causing microbes. They tried introducing a sexually-transmitted disease of plants, called "anther smut," into hosts that were already infected, and found that strains are more likely to share a host if they are more closely related. ...

Researchers offer clues to how leaves patterns are formed

... poets and philosophers have tried to decipher the rules and regulations behind those varied designs and now new research published in part at the University of Alberta offers a big clue to how those patterns are formed. "For years people have been trying to understand this beautiful formation," said Dr....

Dragonfly migration resembles that of birds, scientists say

...us wonder just how far back in Earth's history the rules formigration were established in its animals." According to fossil records, dragonflies appeared about 285 millionyears ago, predating the first birds by about 140 million years. Wikelski said that the findings could also be an important demonstrat...

Drug dials down the energy within cells, UM researchers find

...ting other bioenergetic pathways. Now we have some rules that we can apply to be able to modulate the mitochondria in new ways that could be therapeutic." Ultimately, the findings may have applications not only for lupus, arthritis and psoriasis, but also for other conditions, Glick believes. "There are o...

Surprising symbiosis: Glassy-winged sharpshooter eats with friends

...logical systems and we still do not understand the rules of how it works." "This is why this sharpshooter symbiosis is so important ?it has given us a good model system with two co-dependent bacteria rather than just one." ...

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

...etite/energy regulator is out of whack, so are the rules for gaining and losing weight. "How do you know when to stop eating?" asks M. Daniel Lane, Ph.D., senior author of the study and a professor of biological chemistry in the Institute for Basic Biomedical Sciences at Hopkins. "The liver sure isn't goi...

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