Articles with the keyword: 
New window on the high-energy universe
sea-maid submitted, created time 4 weeks 18 hours (www.sciencenews.org)
New telescope finds that the high-energy share of gamma-ray bursts arrive at Earth significantly later than the low-energy portion. 
Radiotherapy: Worming your way to cell death
sea-maid submitted, created time 2 months 1 week (www.nature.com)
The mechanisms underlying radiation-induced cell death remain somewhat controversial. One suggestion is that ceramide functions as a crucial transducer of apoptosis after exposure to ionizing radiation. However, until now, evidence for a direct link between ceramide synthesis and apoptosis pathways has been lacking. Xinzhu Deng and colleagues now clarify this relationship
Study suggests some breast cancer patients facing radiation after a mastectomy may be over-treated
sea-maid submitted, created time 3 months 2 weeks (esciencenews.com)
A new study suggests standard radiation therapy for some breast cancer patients may not be medically required and may, therefore, be causing unnecessary serious side effects such as lymphedema and pulmonary problems. The research conducted at Fox Chase Cancer Center involved women who got a mastectomy, but whose lymph nodes were negative. "When a woman has a tumor greater than five centimeters and negative lymph nodes, a mastectomy followed by radiation is recommended," said Penny Anderson, M.D., attending physician in the radiation oncology department at Fox Chase
Planets without metal cores may be bad for life
merry submitted, created time 4 months 2 weeks (space.newscientist.com)
Some planets beyond our solar system might be rocky like Earth, but lack its gooey metallic middle, a new study suggests. Such "coreless" terrestrial planets would not have magnetic fields, which would make them inhospitable to life as we know it.
An assessment of natural radioactivity of soils and its external radiological impact
kavin submitted, created time 7 months 2 weeks (www.ncbi.nlm.nih.gov)
Soil samples collected from five states in the southwestern part of Nigeria have been analyzed for activity concentration of gamma-ray emitters. And they found that the calculated collective dose equivalent values for the five states ranged from 87,000 person-Sv to 600,000 person-Sv. The estimated annual outdoor effective values were considerably higher than the world soil average value of 70 muSv y.
jerry submitted, created time 7 months 4 weeks (www.developmentalcell.com)
Surprisingly, sensitive-to-resistant transition happened in post-stage-12 embryos when they are irradiated.
The magic key of this is in the irradiation-responsive enhancer regions of the proapoptotic genes. It becomes enriched for trimethylated H3K27/H3K9 and forms a heterochromatin-like structure during the sensitive-to-resistant transition.
New drug can protect cancer patients from radiation, but does it have other applications?
Darkfrog submitted, created time 8 months 3 weeks (www.sciam.com)
A new drug, called Protectan, can prevent radiation from causing cancer. Researchers noticed that while cancer cells used kappa-beta-a transcription factor to outlive ordinary cells, healthy gut cells also switched it on when they interacted with beneficial gut bacteria. Said researchers then purified a batch of proteins from the bacteria's flagellae and injected them into some test mice. Said mice are still alive and sniffing, even after what would otherwise be lethal doses of radiation.
The most obvious applications are in patients undergoing radiation therapy
CT scans shown to cause cancer
jane2007 submitted, created time 1 year 6 days (www.time.com)
The radiation from a CT scan, or computed tomography, actually has been shown to cause cancer — quite a bit of it. A recent report, published in November in the New England Journal of Medicine suggests that the radiation from current CT-scan use — estimated at more than 62 million CT scans per year in the U.S. (up from 3 million in 1980) — may cause of as many as 1 in 50 future cases of cancer. It's a serious charge.
Nuclear-reactor closure hits cancer tests
jane2007 submitted, created time 1 year 3 weeks (www.nature.com)
Hospitals across North America have been forced to cancel tests for cancer and heart disease because the unexpected closure of a Canadian nuclear reactor has led to a sudden shortage of medical isotopes.
From the article we can know the "NRU reactor was to be decommissioned in 2005, but its operating licence was extended until problems with two replacement reactors",why it happened?
Nanoparticles Enable Surgical Strikes against Cancer
jane2007 submitted, created time 1 year 1 month (www.sciam.com)
In a bid to progress beyond the shotgun approach to fighting cancer—blasting malignant cells with toxic chemicals or radiation, which kills surrounding healthy cells in the process—researchers at the Harvard-MIT Division of Health Sciences and Technology (HST) are using nanotechnology to develop seek-and-destroy models to zero in on and dismantle tumors without damaging nearby normal tissue.
Study: Antioxidants May Provide DNA Radiation Protection Too
yangjane submitted, created time 1 year 2 months (www.scientificblogging.com)
Two common dietary molecules found in legumes and bran could protect DNA from the harmful effects of radiation, researchers from the University of Maryland report.
Inositol and inositol hexaphosphate (IP6) protected both human skin cells and a skin cancer-prone mouse from exposure to ultraviolet B (UVB) radiation, the damaging radiation found in sunlight, the team reported today at the American Association for Cancer Research Centennial Conference on Translational Cancer Medicine.
Inside job: new radioactive agents for colon cancer work inside cells
zibba submitted, created time 1 year 2 months (www.eurekalert.org)
Johns Hopkins scientists have developed a potentially novel way to fight colorectal cancer using tiny molecules to deliver potent barrages of radiation inside cancer cells, unlike current treatments that bind to the surface of cells and attack from the outside and cause unwanted side effects.
Linkage disequilibrium pattern of the ATM gene in breast cancer patients and controls
Scarlett submitted, created time 1 year 5 months (www.ro-journal.com)
The ATM protein is activated as a result of ionizing radiation, and genetic variants of the ATM gene may therefore affect the level of radiation-induced damage.ATM gene may play a role in the activation of both risk of developing breast cancer, and in radiation induced adverse side effects. No association could be found between risk of developing ipsilateral breast tumour recurrence and any of the sequence variants found in the American patient material.
Chernobyl birds are better off drab and lazy
bianjie submitted, created time 1 year 5 months (www.bioedonline.org)
Birds with bright plumage have suffered most from radiation around the Chernobyl nuclear plant, scientists have discovered. Species that lay large eggs or travel long distances are also more susceptible to radiation.
Brightly colored birds most affected by Chernobyl radiation
bianjie submitted, created time 1 year 5 months (www.eurekalert.org)
Brightly coloured birds are among the species most adversely affected by the high levels of radiation around the Chernobyl nuclear plant, ecologists have discovered. The findings -- published online in the British Ecological Society's Journal of Applied Ecology -- help explain why some species are harder hit by ionising radiation than others.
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