Uncategorized
- Health & Medicine
Montezuma’s Welcome Revenge? Bacterial toxin may fend off colon cancer
A diarrhea-inducing toxin from some strains of the common gut bacterium E. coli stifles colon cancer cell growth and may lead to new treatments.
- Earth
Dirty Story: Farming has increased flow of soil onto reef
Agricultural practices that early European settlers brought to eastern Australia sped the pace at which soil washes out to sea and settles over the Great Barrier Reef.
- Astronomy
Cosmic Revelations: Satellite homes in on the infant universe
A new portrait of the infant universe pins down the age of the universe—13.7 billion years—to an unprecedented accuracy of 1 percent, provides new evidence that the universe began with a brief but humongous growth spurt, and reveals that it already contained a plethora of stars when it was just 200 million years old.
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Gene found key to brain chemical
The mammalian brain makes the neurotransmitter serotonin in an unexpected way.
- Health & Medicine
Worms offer the skinny on fat genes
The identification of worm genes that regulate fat storage may provide insight into human obesity.
- Astronomy
Starry eruption on a grand scale
Monitoring the bloated star Rho Cassiopeiae, astronomers report they witnessed an explosion that blasted more material into space than any other stellar explosion ever observed.
- Physics
Streams plus nanostrands equals electricity
A dense bundle of carbon nanotubes develops a voltage difference along its length when immersed in a slow-flowing liquid.
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19221
Your article reports that chemically synthesized erythropoiesis protein (SEP) was more effective than the genetically engineered molecule. Is there speculation on why that is? Ann DershowitzWest Orange, N.J. Chemically constructed SEP molecules are much more consistent in size, shape, and other properties than genetically engineered erythropoietin. The polymer appendages put onto the molecule protect SEP […]
- Chemistry
Synthetic molecule may treat anemia
Researchers have created a new form of the protein erythropoietin (EPO) using synthetic chemistry techniques.
- Earth
9/11 ash, and more, found in river muck
Sediment cores pulled from the Hudson River near the World Trade Center site contain a thin layer of metal-rich ash and pulverized debris.
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19220
I am puzzled by Shuming Nie’s prognostication that quantum dots will “be the first example of nanotechnology that can really have some practical applications.” Colloidal gold particles of similar size to quantum dots have been used as high-resolution labels in electron microscopy for over 30 years. And due to their light-scattering properties, gold and silver […]
- Tech
NanoLights! Camera! Action!
Fluorescent particles of semiconductors are giving biologists a new view of cells and proteins.
