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Tag: "based" at biology news

Making mice with enhanced color vision

...cestors acquired trichromatic vision, color vision based on three receptors. At some point in the past, random mutations created a variant of one receptor gene, located on the X chromosome, producing two different receptor types. Present-day New World (South American) monkeys still use this system, which...

Natural polyester makes new sutures stronger, safer

With the help of a new type of suture based on MIT research, patients who get stitches may never need to have them removed. A biopolymer suture cleared last month by the FDA is made of materials that the human body produces naturally, so they can be safely absorbed once the wound is healed. T...

Pregnancy hormone key to repairing nerve cell damage

...heir myelin was also repaired. The research was based on evidence that MS, which is more common in women than men, goes into remission when women become pregnant. MS is a neurodegenerative disease where the body's own immune system attacks the myelin surrounding nerves, leading to progressive loss of se...

Tears reveal some of their deepest secrets to researchers

...lows the instrument to detect different components based on electrical charges and mass. Nichols points out that researchers have used other techniques, such as chromatography, to characterize types of lipids in the tear film, but advances in mass spectrometry technology are improving research efforts. ...

FDA causes unnecessary scare about common painkillers

...y and Risk Management Advisory Committee. "This is based on the false assumption that all nonsteroidal anti.... He said this suggests that the decisions are not based on scientific evidence. With Celebrex, the FDA didn't follow the recommendations of its Advisory ...

Microfossils unravel climate history of tropical Africa

...od to reconstruct the history of land temperatures based on the molecular fossils of soil bacteria. They ap...used to estimate past sea surface temperatures, is based on organic molecules from algae growing in the surface layer of the Ocean. These organisms adapt the...

Scientists re-grow dental enamel from cultured cells

...ifted by Dr. Green). The cell-scaffold approach is based on tissue-engineering technology developed at the Forsyth Institute (MA) and was applied by one of the Tokyo researchers to produce enamel-like tissues in 2002. Now that dental epithelial cells can be propagated in culture, the next step will be to a...

Meeting the ethanol challenge: Scientists use supercomputer to target cellulose bottleneck

...ions at the San Diego Supercomputer Center (SDSC), based at UC San Diego. By using "virtual molecules," they have discovered key steps in the intricate dance in which the enzyme acts as a molecular machine -- attaching to bundles of cellulose, pulling up a single strand of sugar, and putting it onto a mole...

Novel computed imaging technique uses blurry images to enhance view

...ion, reconstructed images from the optical signals based on an understanding of the physics of light-scattering within the sample. "ISAM has the potential to broadly impact real-time, three-dimensional microscopy and analysis in the fields of cell and tumor biology, as well as in clinical diagnosis where...

Organic is healthier: Kiwis prove that green is good

...rg About Wiley John Wiley & Sons, Ltd., based in Chichester, England, is the largest subsidiary of John Wiley & Sons, Inc. Founded in 1807, John Wiley & Sons, Inc. provides must-have content and services to customers worldwide. Their core businesses include scientific, technical, and m...

Ladybugs may be cute, but watch out when they get near wine

... "Dr. Leakey produced a biased reconstruction based on erroneous preconceived expectations of early human appearance that violated principles of craniofacial development," said Dr. Bromage, whose reconstruction, by contrast, shows a sharply protruding jaw and a brain less than half the size of a moder...

Man's earliest direct ancestors looked more apelike than previously believed

... "Dr. Leakey produced a biased reconstruction based on erroneous preconceived expectations of early human appearance that violated principles of craniofacial development," said Dr. Bromage, whose reconstruction, by contrast, shows a sharply protruding jaw and a brain less than half the size of a moder...

Too much of a good thing? Excess nutrients or water limit biodiversity

... examples of this phenomenon. The findings are based on experiments carried out at the University of California’s Sedgwick Reserve in the Santa Ynez Valley, where the researchers applied combinations of nutrients and water to plots of grassland. Plots that received all of the resources had the fewest s...

Study finds mercury prevalent in many western fish

... fish-eating animals," Hughes added. The study, based on data collected from EPA's Environmental Monitoring and Assessment Program, encompassed nearly 188,000 miles of perennial streams and rivers in the western United States. The selection of the more than 600 creek and river sample sites was done rand...

How stem cells are regulated

...portant part in embryogenesis. The conclusions are based on studies of the nematode (roundworm) C. elegans and studies of mouse embryonic stem cells. The C. elegans studies were carried out in collaboration with another of BRIC’s research groups, led by Associate Professor Lisa Salcini. The BRIC resear...

A revolution in the monitoring of unborn babies

...that we have on our horizon.? Currently hospital based ultrasound is used to record babies?heart rates during pregnancy. While this technique has proven benefits, it needs to be administered by trained professionals and it is not suitable for routine, continuous, long-term monitoring. Dr Barrie Hayes-Gil...

Fish can determine their social rank by observation alone, study finds

...d in the Jan. 25 edition of the journal Nature, is based on a unique experiment with cichlids (SIK-lids), small territorial fish from Africa. "In their natural habitat, male cichlids are constantly trying to ascend socially by beating each other up," said study co-author Russell D. Fernald, professor of bi...

Fish growth changes enhanced by climate change

...roceedings of the National Academy of Sciences ?is based on the examination of fish earbones, or otoliths, ...urface temperatures have risen nearly two degrees, based on the results of a monitoring program at Maria Island. Coinciding with this has been a southward s...

How T lymphocytes attack

...body's defences against an infection or tumour are based on a string of actors, some of them generalists, the others highly specialised. Cytotoxic T lymphocytes belong to the second category. To achieve their task, their cell surface carries a membrane receptor which is complementary to the antigen in t...

Protein therapy may reduce infarct size in heart attack patients

...th a favorable safety and tolerability profile and based on this ‘first in human?trial, we are interested in pursing larger studies to determine the therapeutic value of this treatment for heart attack patients receiving reperfusion therapy." ...

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