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Radiation Generates Cancer Stem Cells From Less Aggressive Breast Cancer Cells

By Guest PostFebruary 19, 2012Healthbreast cancer, cancer cell, chemotherapy, dna damage, frank pajonk, ibcsc, induced pluripotent stem cells, ips, kim irwin, oncologist, radiation therapy, radiation treatment, regenerative medicine, stem cell, tumor, tumor recurrence

Breast cancer stem cells, thought to be the sole source of tumor recurrence, are known to be resistant to radiation therapy and don’t respond well to chemotherapy.

Now, researchers with the UCLA Department of Radiation Oncology at UCLA’s Jonsson Comprehensive Cancer Center report for the first time that radiation treatment, despite killing half of all tumor cells during every treatment, transforms other cancer cells into treatment-resistant breast cancer stem cells. (more…)

Building A Better Trap

By Guest PostFebruary 19, 2012Naturebuilding a trap, collecting insects, led modified trap, leds, light emitting diodes, new trap, sand flies

Fieldwork in Peru’s Andes Mountains is demanding, especially when it involves hauling heavy equipment to remote sites that are accessible only by traversing the region’s rugged terrain. (more…)

Clam Fields Found at Deep, Low-Temperature Mariana Vents

By Guest PostFebruary 19, 2012Sciencehydrothermal vents, mariana plate, mariana trench, serpentinite vents, serpentinization of peridotite, shinkai seep field, southern mariana forearc, vesicomyid clams

Scientists have marveled at the unusual life forms thriving at high temperature hydrothermal vents of the deep ocean. (more…)

Economic Forecast

By Guest PostFebruary 19, 2012Economy2012, americans, bruce weber, ceee, charles i plosser, clayton hall, david lyons, economic forecast, economic growth, Economy, evan krape, fiscal policy, government treasuries, jay fishman, jim o neill, joan woodward, john f kennedy, jon hilsenrath, kathryn meier, lyons companies, media experts, michael k farr, monetary policy, overdraft, philadelphia federal reserve, president bill clinton, public policy, the arrogance cycle, travelers insurancy company, unemployment, university of delaware, us debt, Wall Street Journal, Washington

*No silver bullet but hope for economy remains, experts tell audience at UD*

Analogies abounded at the 2012 Economic Forecast, where speakers compared monetary policy to turnpike driving, fiscal policy to an empty toolbox and investing to “finding the least worst house on an unstable block.”

Charles I. Plosser, president and CEO of the Philadelphia Federal Reserve, was one of three featured speakers at the annual event, which was sponsored by Lyons Companies and the University of Delaware’s Center for Economic Education and Entrepreneurship (CEEE) and held Tuesday, Feb. 14, at UD’s Clayton Hall. (more…)

NASA Map Sees Earth’s Trees in a New Light

By Guest PostFebruary 19, 2012Environment, Scienceaustralia, caltech, carbon, carbon cycle, climate change, cloud, data, earth, effects of topography, eucalyptus, flowering plants, forest, forest canopy, forest habitat, global map of forest height, height, high resolution map, icesat, laser pulse measurements, lidar, light detection and ranging, marc simard, modis, monitor, NASA, new zealand, satellites, south latitude, southern tropical forests, Space, spatial modeling, spatial resolution, trmm sensors, vegetation, worldclim database

PASADENA, Calif. – A NASA-led science team has created an accurate, high-resolution map of the height of Earth’s forests. The map will help scientists better understand the role forests play in climate change and how their heights influence wildlife habitats within them, while also helping them quantify the carbon stored in Earth’s vegetation.

Scientists from NASA’s Jet Propulsion Laboratory, Pasadena, Calif.; the University of Maryland, College Park; and Woods Hole Research Center, Falmouth, Mass., created the map using 2.5 million carefully screened, globally distributed laser pulse measurements from space. The light detection and ranging (lidar) data were collected in 2005 by the Geoscience Laser Altimeter System instrument on NASA’s Ice, Cloud and land Elevation Satellite (ICESat). (more…)

Teaching Science to The Religious? Focus on How Theories Develop

By Guest PostFebruary 18, 2012Educationanti religious agenda, explaining science, rational process, religious students, scientific theory, zero sum mindset

Brown biology Professor Ken Miller understands that most students are religious. He is too. The way to teach science to religious students is to show how scientific ideas come to be, he says. Students can learn that religious people engage in scientific explorations of nature, and that theories are based on observation and logic, not some anti-religious agenda.

Vicious, winner-take-all competition in nature is an essential pillar of evolutionary theory, but it frequently describes the mindset people have about how, or whether, to teach the subject. Religious students sometimes come to class thinking that science and religion are in deliberate opposition, like two lionesses fighting over a kill. When Brown University biologist and practicing Catholic Kenneth Miller teaches evolution, he also teaches that such a zero-sum mindset just isn’t warranted. (more…)

Study: Military Death Sentence More Likely For Minorities

By Guest PostFebruary 18, 2012Politicscapital punishment, military criminals, military death sentence, military prosecutions, racial discrimination, skin color

EAST LANSING, Mich. — Skin color plays a role in deciding whether to execute military criminals, according to a new study by a Michigan State University law professor who found minorities in the military are twice as likely as whites to be sentenced to death. (more…)

UCLA Engineers Create Tandem Polymer Solar Cells That Set Record For Energy-Conversion

By Guest PostFebruary 18, 2012Scienceabsorption, california nanosystems institute, cnsi, conductive, conversion, electricity, gang li, Japan, organic polymers, photovoltaic solar cells, polymer solar cells, shuji doi, solar energy, solar spectrum, sumitomo chemical, sunlight, tandem solar cell technology, tandem structure, yang yang

In the effort to convert sunlight into electricity, photovoltaic solar cells that use conductive organic polymers for light absorption and conversion have shown great potential. Organic polymers can be produced in high volumes at low cost, resulting in photovoltaic devices that are cheap, lightweight and flexible.

In the last few years, much work has been done to improve the efficiency with which these devices convert sunlight into power, including the development of new materials, device structures and processing techniques. (more…)

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