Ethanol Feedstock From Citrus Peel Waste

With the recent wild fluctuations in gasoline prices, there’s renewed interest in finding a cheaper way to fill up the gas tank. In 1992, Karel Grohmann, then research leader of the ARS Subtropical Products Laboratory in Winter Haven, Florida, began research on converting citrus peel waste into fuel ethanol. Citrus waste materials are rich in pectin, cellulose, and hemicellulosic polysaccharides, which can be hydrolyzed into sugars and fermented into alcohol.

Moondust’s Magnetic Charms

Thirty-plus years ago on the moon, Apollo astronauts made an important discovery: Moondust can be a major nuisance. The fine powdery grit was everywhere and had a curious way of getting into things. Moondust plugged bolt holes, fouled tools, coated astronauts’ visors and abraded their gloves. Very often while working on the surface, they had to stop what they were doing to clean their cameras and equipment using large–and mostly ineffective–brushes.

Hints of Planet Birth Around Dead Star

NASA’s Spitzer Space Telescope has uncovered new evidence that planets might rise up out of a dead star’s ashes. The infrared telescope surveyed the scene around a pulsar, the remnant of an exploded star, and found a surrounding disk made up of debris shot out during the star’s death throes. The dusty rubble in this disk might ultimately stick together to form planets.

Blind Mice Recover Visual Responses Using Protein from Green Algae

Nerve cells that normally are not light sensitive in the retinas of blind mice can respond to light when a green algae protein called channelrhodopsin-2 (ChR2) is inserted into the cell membranes, according to a National Institutes of Health (NIH)-supported study published in the April 6, 2006 issue of the journal Neuron. The study was conducted with mice that had been genetically bred to lose rods and cones, the light-sensitive cells in the retina. This condition is similar to the blinding disease retinitis pigmentosa (RP) in humans.

Thinner and younger

Can eating a low-calorie yet nutritionally balanced diet extend human life? Preliminary research suggests it might, so researchers at Washington University School of Medicine in St. Louis are launching a long-term study to find out.