Sci/Tech

Stronger turbine blades with molybdenum silicides
September 23, 2016 04:24 PM - National Institute for Materials Science via ScienceDaily

Researchers at Kyoto University have found that molybdenum silicides can improve the efficiency of turbine blades in ultrahigh-temperature combustion systems.

Gas turbines are the engines that generate electricity in power plants. The operating temperatures of their combustion systems can exceed 1600 °C. The nickel-based turbine blades used in these systems melt at temperatures 200 °C lower and thus require air-cooling to function. Turbine blades made out of materials with higher melting temperatures would require less fuel consumption and lead to lower CO2 emissions.

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The Antarctic Ozone Hole May Be Closing
July 7, 2016 07:21 AM - s.e. smith

There’s good news from Antarctica, where researchers with tools like ozonesondes — pictured above — have been following the infamous ozone hole as it waxes and wanes over the seasons. The ozone hole has shrunk by 1.5 million square miles – around 4 million square kilometers — and this “healing” trend appears to be continuing.

A major ecological catastrophe has been averted, and we can cite human intervention as the reason. When the globe swept into action with 1987′s Montreal Protocol, which banned a number of substances known to contribute to ozone depletion, it apparently worked.

When scientists first began to observe a hole in the ozone layer over Antarctica, it was a cause for grave concern. Though ozone levels actually fluctuate throughout the year, they perform an important function by blocking the sun’s harmful UV radiation.

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SPOTLIGHT

Bright Lighting Encourages Healthy Food Choices

Food and Brand Lab, Cornell University.

Dining in dimly lit restaurants has been linked to eating slowly and ultimately eating less than in brighter restaurants, but does lighting also impact how healthfully we order?

New research findings forthcoming in the Journal of Marketing Research illustrate that those dining in well-lit rooms are about 16-24% more likely to order healthy foods than those in dimly lit rooms. Furthermore, the researchers found evidence that this effect is due mainly to the level of diners’ alertness. “We feel more alert in brighter rooms and therefore tend to make more healthful, forward-thinking decisions,” explains lead author Dipayan Biswas, PhD, University of South Florida.

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