Κυριακή, 30 Μαρτίου 2014

ScienceDaily: Top Science News

ScienceDaily: Top Science News


Daylight saving impacts timing of heart attacks

Posted: 29 Mar 2014 02:51 PM PDT

Still feeling the residual effects of springing ahead for daylight saving time? The hour of sleep lost -- or gained -- may play a bigger, perhaps more dangerous role in our body's natural rhythm than we think. It seems moving the clock forward or backward may alter the timing of when heart attacks occur in the week following these time changes, according to research.

Health costs of air pollution from agriculture clarified

Posted: 28 Mar 2014 02:52 PM PDT

Ammonia pollution from agricultural sources poses larger health costs than previously estimated, according to research. Computer models, including a NASA model of chemical reactions in the atmosphere, were used to better represent how ammonia interacts in the atmosphere to form harmful particulate matter. The improved simulation helped the scientists narrow in on the estimated health costs from air pollution associated with food produced for export -- a growing sector of agriculture and a source of trade surplus.

Rainbow-catching waveguide could revolutionize energy technologies

Posted: 28 Mar 2014 09:10 AM PDT

By slowing and absorbing certain wavelengths of light, engineers open new possibilities in solar power, thermal energy recycling and stealth technology More efficient photovoltaic cells. Improved radar and stealth technology. A new way to recycle waste heat generated by machines into energy. All may be possible due to breakthrough photonics research.

Marriage linked to lower heart risks in study of more than 3.5 million adults

Posted: 28 Mar 2014 05:55 AM PDT

People who are married have lower rates of several cardiovascular diseases compared with those who are single, divorced or widowed, according to research. The relationship between marriage and lower odds of vascular diseases is especially pronounced before age 50. For people aged 50 and younger, marriage is associated with 12 percent lower odds of any vascular disease. This number drops to 7 percent for people ages 51 to 60 and only 4 percent for those 61 and older.

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