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Tag: "stable" at biology news

Infants can organise visual information at just four months

...ly, these categories were thought to be relatively stable traits indicative of individual differences, with links to later cognitive development. However, the research revealed that babies often move between these two categories over the timescale studied. "The literature talks about the short-looking and l...

New study explores beetle species with two forms of females

...archers found that this polymorphism is actually a stable state, that is, neither of the forms go extinct. "The results have implications for the understanding of how genetic diversity is maintained in populations where sexual conflict characterizes the mating system," write the authors. "It also affects ...

Researchers map of genetic variations implicated in disease

... We hope to show, in further studies, whether this stable region was a key to disease resistance in our recent past." The study further described over 300 amino acid changing variants in gene sequences. These variants are strong candidates for functional studies to understand the role of variation in MHC-a...

Enzyme inhibitors block replication of SARS virus

...ary. "These benzotriazole esters are relatively stable and act as suicide inhibitors," Wong said. "They block the enzyme, are transformed through a co-valent bond, and are unable to get out." Wong said the findings published today provide better insight into the mode of action of the enzyme, which may l...

World faces challenge as life expectancies lengthen, scientist says

...ocioeconomic health, he noted. Even countries with stable populations will see the age composition of the citizenry undergo a dramatic shift toward the elderly, who are frequently retired or disabled. To factor in this phenomenon, Tuljapurkar examined the effects of anti-aging technologies on the national ...

For one Stanford doctor, the beat goes on during open-heart surgery

...easier for surgeons to perform because they have a stable target. The heart is not moving. In beating-heart surgeries - currently used in about 22 percent of U.S. bypass procedures - a surgeon's ability to stitch vessels onto a moving, blood-filled heart replaces the need for the heart-lung machine. A stab...

UW-Madison engineers squeeze secrets from proteins

...oteins are confined by their environment, the more stable - or less likely to unfold - they become. Now, as ...em in hot water. They design enzymes that are more stable than normal enzymes at high temperatures." To better understand protein folding, de Pablo's team bu...

Newly discovered protein kills anthrax bacteria by exploding their cell walls

...he most efficient biowarfare agent. Its spores are stable and easy to produce, and once someone inhales them, there is only a 48-hour window when antibiotics can be used," says Fischetti. "We've found a new protein that could both potentially expand that treatment window and be used as a large-scale deconta...

Carbon cycle was already disrupted millions of years ago

...lions of years old. Carbon occurs naturally in two stable forms; atomic mass 12 (99 percent) and atomic mass...t carbon isotope 12C. Due to this the ratio of the stable carbon isotopes 13C/12C has show a clearly measurable decrease of 0.1%. However in the Jurassic and ...

Genetically engineered mosquitoes show resistance to dengue fever virus

...cted DNA into mosquito embryos, creating the first stable transgenic mosquito resistant to Type 2 dengue fev...e have brought all the pieces together to create a stable model that can also reproduce." In the study, the researchers exploited a vulnerability of the deng...

Most human-chimp differences due to gene regulation ?not genes

...enes may be harmful. In fact, five of the 100 most stable genes have altered expression levels in liver cancer. When they also looked for human genes with significantly higher or lower expression levels, they found 14 genes with increased expression and five with decreased expression. While only ten percen...

Scientists identify molecular structure of key viral protein

... state (pre-fusion), to its second, final and very stable state (post-fusion), undergoing a dramatic change of shape. "The protein in its metastable state has a very specific job to do -- to enable infection of the cell -- and it does this by essentially acting as a harpoon that shoots into the cell's membr...

Pennsylvania researchers find liver transplants provide metabolic cure for rare genetic disease

...lized within 6-12 hours of transplant and remained stable since transplant despite unrestricted intake of protein. MSUD is a metabolic disease which causes amino acids from proteins to accumulate in the body. The disease gets its names from the sweet smell of the urine. The accumulation of amino acids in ...

Taipan venom no snake oil

... Factor X in their livers. "Snakes produce a more stable and faster acting form of Factor X in their venom which is the only source of Factor X other than mammalian livers," he said. "They have developed the ability to deliver massive fatal doses of Factor X to specifically target the systems ofmammals." ...

Stable polymer nanotubes may have a biotech future

...are unusually long (about 1 centimeter) as well as stable enough to maintain their shape indefinitely. Described in a new paper in Proceedings of the National Academy of Sciences,* the NIST nanotubes may have biotechnology applications as channels for tiny volumes of chemicals in nanofluidic reactor devices...

Oxidation defense in mosquitoes benefits malaria parasite

...ing the chemically reactive 3-HK to the chemically stable XA via transaminase-mediated reactions," said Li. The protein described in the PNAS article is responsible for this transforming of 3-HK into XA in the malaria vector Anopheles gambiae, where XA also helps the malarial parasite reproduce. So stoppi...

Science finds new fix for UV-damaged skin in arthritis treatment

...panel determined that n-acetyl glucosamine, a more stable form of glucosamine, reduced the amount of melanin in skin cells, meaning there was less excess pigment in the skin to cause age spots. Additionally, the panel concluded that a formulation of n-acetyl glucosamine and niacinamide, a vitamin B derivat...

New fruit fly protein illuminates circadian response to light

...metabolism. Although circadian function produces a stable rhythm in the body, the biological clock will reset in response to light. The human condition known as jet lag takes place during the period when the body is attempting to resynchronize to the environmental light changes brought on by travel, namely ...

Attacking cancer's sweet tooth is effective strategy against tumors

...genic ones. "If you have a molecule that is very stable you could think about delivering it first, obliterating the glycolytic pathway," said Fantin. Angiogenesis inhibitors would wipe out blood vessels and the oxygen supply with it, leaving the cells with no way to cope. "There is definite potential to c...

Brittle prions are more infectious

...the wrong thing to do, because prions that are too stable may be the ones that are not very infectious because the aggregates are hard to break up. "And from a therapeutic point of view, our findings suggest that effective treatment strategies for prion diseases might aim at stabilizing prion aggregates. B...

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