Research ends debate over benefits of butterfly defenses
...micking techniques, giving us greater insight into why particular species evolve to resemble one another and change their behaviour....Birds take cues from their competitors
...h other. If patch and microhabitat copying occurs, why not more generalized social learning of nest-site features"" At two different study sites, the researchers created artificial, neutral nest-site preferences of tits by attaching a geometric symbol on their nest boxes before the flycatchers arrived,...Malaria-resistant mosquitoes battle disease with 'molecular warhead'
...hwestern Medical Center researchers has discovered why some mosquitoes are resistant to malaria, a findin...hwestern Medical Center researchers has discovered why some mosquitoes are resistant to malaria, a finding that may one day help fight a disease that affli...Amoebae control cheating by keeping it in the family
...bert said, "Our results answer the big question of why altruism persists. It persists because high relatedness prevents the spread of socially destructive mutants."...Complementary therapy for infertile women may reduce chances of pregnancy
...of Copenhagen, Dr. Lone Schmidt, set out to study why women made these choices, in the hope of being able to better inform them both of their effectiveness and of other options for achieving pregnancy and reducing the stress of infertility. They examined the psychosocial and medical profiles of 818 Da...Pre-implantation genetic screening reduces both ongoing pregnancy and live birth rates in over 35s
...currently following up their work by investigating why PGS does not work. Even though evidence underpinning the effectiveness of PGS was lacking until now, patients as well as doctors were attracted to this technique. The idea of screening embryos for chromosomal abnormalities to increase live birth...Color is in the eye of the beholder
... chromaticity coordinates. The paper also explains why human vision perceives substances like pumpkin seed oil as dichromatic or polychromatic (exhibiting a variety of colors). Two phenomena explain the perceived shift in color of pumpkin seed oil from red to green: Firstly, the distinctive change in...Skin rash actually signifies better outcomes for pancreatic and lung cancer patients
...bo patients who didnt develop a rash. We dont know why some patients treated with a placebo developed a r...o the strength of their immune system, and that is why they survived longer, Wacker said. In the second clinical trial (known as PA.3) that tested Tarce...From clinical cancer research: rethinking therapeutic cancer vaccine trials
... While there is no conclusive evidence to explain why a vaccine may lead to better patient sur-vival, Schlom believes the evidence suggests that vaccines are, in fact, priming the immune sys-tem. Vaccines are not passive, they induce a dynamic process of immune response that, in many cases may keep the ...Cloning the male genome may help infertile men
... There is much work still to be done to understand why impaired development and abnormalities in the embryo occur, and to take steps to avoid that occurrence....New clue why MS affects African-Americans differently than Caucasians
...) compared to Caucasians, possibly offering a clue why African Americans experience more disability with ... begun to identify certain genes which may explain why African Americans experience more disability, but the products of these genes and the mechanism of t...Antibody linked to MS significantly higher in spinal fluid of blacks
...bama at Birmingham. "No one really understands yet why inflammation levels differ from one MS patient to the next." The new study measured cerebrospinal fluid levels of IgG, an immune system antibody. Rinker and others have previously linked greater IgG to more aggressive MS in the general patient popul...JCI Table of Contents -- July 2, 2007
...ite blood cells known as neutrophils is one reason why some individuals exposed to the infectious bacteri... Utah School of Medicine discusses several reasons why these results are important. First, they suggest the possibility of pharmacological intervention for...Mother-of-pearl -- Classic beauty and remarkable strength
...de. And we don't understand how it forms - that's why it's so fun to study." Understanding the mechanism by which nacre forms would be the first step toward harnessing its strength and simplicity, she says. "We don't know how to synthesize materials that are better than the sum of their parts." Wr...Time-lapse recordings reveal why IVF embryos are more likely to develop into twins
...bryos (blastocysts) in the laboratory has revealed why embryos created via IVF and undergoing extended cu...er thousand deliveries). However, it was not known why this happened. Using 33 surplus frozen-thawed embryos that had been donated for research, Ms Payne......ion, and scientists are still trying to figure out why these patients survive and others dont. There are no treatments for this massive all-out war on the body. Those who survive often face serious cardiovascular problems. Scientists examining cardiac function during sepsis have identified macrophage mi...Loss of cell's 'antenna' linked to cancer's development
...ost their cilia, and this absence may help explain why tumors fail to respond properly to environmental cues that cause normal cells to stop growing. Hence, the discovery that too much HEF1 and Aurora A cause cilia to disassemble provides important hints into what may be happening in cancers. Defects ...Support for chromosomal theory of cancer found in cancers' development of drug resistance
...oblem these conventional theories don't address is why it (drug resistance) doesn't happen in normal cells," he said. "Why aren't we all getting resistant to any toxic drug we are exposed to" Why does it happen only in cancer cells" Why do cancer cells become resistant and the patients don't"" In his e...Wood ant queen has no egg-laying monopoly
...rsity of Sheffield, UK, the big questions are then why are the workers so persistently trying, and how does this ongoing conflict over reproduction affect colony functioning as a whole.......ore recently I have been investigating the reasons why Asian people with diabetes living in the UK have less peripheral nerve damage and how this relates to altered blood flow in the smallest vessels, said Dr Abbott, who works in Professor Andrew Boultons lab. The ulcer-prediction methods we employed i...