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Tag: "standard" at biology news

High estrogen levels associated with dementia in older men

...gnitive decline and Alzheimer's disease." For each standard deviation increase in estradiol level, the risk for the disease went up by 25 percent. Furthermore, compared with the lowest tertile of estradiol, men in the middle and highest tertile had .24 and .28 points lower CASI scores, respectively, for each ...

New genetic test for breast cancer

...that has not yet spread to the lymph nodes. The standard treatment is surgery to remove the tumor, plus rad...a patient's risk of recurrence more precisely than standard clinical characteristics, such as tumor size and grade. It also helps predict whether a patient wil...

Mass. General study finds potential ovarian cancer stem cells

...ehind the difficulty of treating these tumors with standard chemotherapy. Understanding more about the stem-like characteristics of these cells could lead to new approaches to treating ovarian cancer, which kills more than 16,000 U.S. women annually and is their fifth most common cause of cancer death. The r...

Sandia work launched on space shuttle shows live cells influence growth of nanostructures

...iation of outer space - than those created by more standard chemical procedures. Sandia is a National Nuclear Security Administration laboratory. "Cheap, tiny, and very lightweight sensors of chemical or biological agents could be made from long-lived cells that require no upkeep, yet sense and then commu...

Mouse mimics chronic leukemia, will aid drug development

...survival after diagnosis is eight to 12 years. The standard treatment for CLL is the drug fludarabine, but the disease often becomes resistant to the drug. This TCL-1 mouse strain was originally developed by OSU cancer researcher Carlo M. Croce, professor and chair, department of molecular virology, immuno...

DOE JGI finishes 100th microbial genome

...DOE JGI, is a technical designation referring to a standard of accuracy established for the Human Genome Project of tolerating no more than one mistake in 50,000 letter of genetic code with no gaps. The microbes sequenced by DOE JGI, both single-celled, and those multi-celled organisms invisible to the naked...

MIT 'seeing machine' offers hope to blind

...ey could see nothing smaller than the "big E" on a standard eye chart. With her weak eye, Goldring can distinguish between light and dark and she can see hand movement, although not individual fingers. She cannot recognize faces or read. Subjects "had a wide range of cause for vision loss, including diabet...

Bubbles go high-tech to fight tumors

... lodge in vessels. Doctors image the droplets with standard ultrasound, and once the droplets reach their destination, scientists hit them with high intensity ultrasound. The ultrasound acts like a pin popping a water balloon. After the shell pops, the perfluorocarbon expands into a gas bubble that is approxi...

Novel therapy combinations gain ground in treating hepatitis

...n patients who have not experienced remission with standard therapies: valopicitabine alone (800 mg/d), one of...atment period of 72 weeks, compared to the current standard of 48 weeks, in patients with chronic hepatitis C. Previous studies have shown that with 48 weeks ...

Completed genome set to transform the cow

...in, will consistently produce meat of a particular standard of tenderness and marbling." He says, despite the centuries of inbreeding involved in developing different cattle breeds, most maintain a "surprisingly large" degree of genetic diversity. Contributors to the US$53 million international effort to s...

New light microscope sharpens scientists' focus

...ounding," Betzig said. "It knocks the socks off of standard fluorescence microscopy from a resolution perspective." Hess added, "This level of detail was previously only obtainable with an electron microscope. However, the contrast in electron microscopy is more indiscriminate, whereas we can limit our con...

Blood test predicts success of quitting smoking using the nicotine patch

...stinguish smokers who are likely to benefit from a standard dose of nicotine patch from those who may need a higher dose patch or an alternative therapy in order to succeed in quitting," said lead researcher for the study, Caryn Lerman, PhD, Associate Director for Cancer Control and Population Science at the ...

Agriculture and tropical conservation: rethinking old ideas

...own and turn the land into cattle pastures. So the standard litany doesn't ring true to them." Vandermeer and Perfecto reviewed studies of biodiversity in the Atlantic coast rainforest of Brazil, a region that is unusual in having areas of tremendous biological variety adjacent to highly developed, industr...

Combined treatment extends life expectancy for lung cancer patients

... percent three years ?57 percent Surgery is the standard treatment for lung cancer. However, only one-third...al ablation (RFA or microwave ablation) and either standard radiation therapy or brachytherapy, a procedure in which a "seed" of radioactive material is implant...

MatBase -- A new transcription factor knowledge base released by Genomatix

...key to success for MatInspector, the de facto gold standard in gene promoter analysis, used by more than 31.000 scientists around the globe today. More than 80% of our matrices match less than once in 1000 base pairs of random DNA sequences", she continues. MatInspector employs the weight matrix descriptions...

Coming soon: 3-D imaging that flies 'through' and 'around' cancer

...nto three dimensions," said Quon. PET and CT are standard imaging tools that can be used to pinpoint the loc...ical application. While this technology may become standard over the next three to five years, "it could have exciting applications in cardiovascular imaging, p...

Federal testing for mad cow disease a failure, law review editor says

...s with objective criteria for private producers. A standard testing regime would enable private producers such as Creekstone to market their beef as 'tested for BSE.'" Berlowitz cited news reports that the cost of such testing would add only6 to 10 cents to a pound of beef. His article further warns of poo...

Research links protein to breast-cancer migration

... kill invasive cells that have become resistant to standard treatment." A further £143,000 has been awarded by the charity to Dr Keith Brennan, again in Life Sciences, to uncover how a group of proteins called Notch are able to protect breast-cancer cells from dying. "Notch proteins appear to shield breast-...

Researcher studies, treats military with 'silent disease'

... are that person's disease may not progress." The standard treatment--24 to 48 weeks of a once-a-week injection with interferon and several pills of ribavirin each day--are what Sjogren speculated would cause a decrease in quality of the volunteers' lives. "The medications are tough to take," she said. On i...

DNA to the defense

... brucei chromosomes are diploid, meaning that the standard two copies are present. "The main observation from our work is that subtelomeres can dominate a chromosome to such an extent that a very small proportion of a chromosome is truly diploid," Melville explains. "These huge subtelomeres are largely n...

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