Chipmunk100 - Slashdot User

Submission + - Biofuels from corn crop can generate more greenhouse gases than gasoline (unl.edu)

Submitted by Chipmunk100 on Sunday April 20, 2014 @04:56PM

Chipmunk100 writes: Using corn crop residue to make ethanol and other biofuels reduces soil carbon and can generate more greenhouse gases than gasoline, according to a study published today in the journal Nature Climate Change. The findings by a University of Nebraska-Lincoln team of researchers cast doubt on whether corn residue can be used to meet federal mandates to ramp up ethanol production and reduce greenhouse gas emissions.

Submission + - Los Angeles Science Teacher suspended over student science fair projects (scpr.org)

Submitted by Anonymous Coward on Sunday April 20, 2014 @04:12PM

An anonymous reader writes: "A high school science teacher at Grand Arts High School in Los Angeles was suspended from the classroom in February, after two of his science fair students turned in projects deemed dangerous by the administrators. " "One project was a marshmallow shooter—which uses air pressure to launch projectiles. The other was an AA battery-powered coil gun—which uses electromagnetism to launch small objects. Similar projects have been honored in past LA County Science Fairs and even demonstrated at the White House."

Submission + - Masculine boys, feminine girls more likely to engage in cancer risk behaviors (harvard.edu)

Submitted by Chipmunk100 on Saturday April 19, 2014 @02:54PM

Chipmunk100 writes: Young people who conform most strongly to norms of masculinity and femininity are significantly more likely than their peers to engage in behaviors that pose cancer risks. The most feminine teenage girls use tanning beds more frequently and are more likely to be physically inactive, while the most masculine teenage boys are more likely to use chewing tobacco and to smoke cigars, compared with their gender-nonconforming peers, according to a new study led by Harvard School of Public Health (HSPH) researchers.

Submission + - Surgery with a paintbrush

Submitted by BiancaM on Saturday April 19, 2014 @04:05AM

BiancaM writes: A group of chemists has shown the power of nanoparticles for closing and healing surgical wounds. Using no more than a paintbrush they are able to close surgical openings as well as classical techniques such as sutures. However in fragile deap tissues such as liver even more remarkable results were found- normally fatal damage to internal organs is repaired in seconds using a nanopartilce glue. The results show that closing after surgery can be faster and simpler using nanomaterials to glue wounds shut.

Article at:
http://onlinelibrary.wiley.com...

Video:
http://onlinelibrary.wiley.com...

Submission + - Electronic systems that substitute flexible plastic for silicon chips

Submitted by Chipmunk100 on Wednesday April 16, 2014 @10:32PM

Chipmunk100 writes: According to a paper published in Nature Communications computers and cell phones that substitute flexible plastic for silicon chips may be one step closer to reality. The researchers show an efficient means of converting information encoded in magnetic storage to light in a flexible plastic device. Transduction between magnetic and optical information in typical organic semiconductors poses additional challenges, as the spin–orbit interaction is weak and spin injection from magnetic electrodes has been limited to low temperature and low polarization efficiency. Here we demonstrate room temperature information transduction between a magnet and an organic light-emitting diode that does not require electrical current, based on control via the magnet’s remanent field of the exciton recombination process in the organic semiconductor.

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