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Salt Seeds Clouds in the Amazon Rainforest

By Guest PostSeptember 13, 2012Environmentabsorption, aerosol particle, airborne particle, als beamline, Amazon, amazon jungle, amazonian, asci, ballistospores, berkeley lab, biomass, brazil, chemistry, christopher pohlker, david kilcoyne, deep, emission, fine particle, fog, forest canopy, fungi fire, gas phase, Germany, graphitic, institute, isoprene, leaves, liquid droplet, manaus, mary gilles, max planck, meinrat andreae, microscopy, moisture, morning, mpic, natural forest, nexafs, organic carbon, organism, osmosis, photon, potassium level, potassium salt, rainforest, sacs, seed, soluble particle, stxm, sugar alcohol, terpenes, tree resin, trees, ulrich pöschl, water vapor, xray

It’s morning, deep in the Amazon jungle. In the still air innumerable leaves glisten with moisture, and fog drifts through the trees. As the sun rises, clouds appear and float across the forest canopy … but where do they come from? Water vapor needs soluble particles to condense on. Airborne particles are the seeds of liquid droplets in fog, mist, and clouds.

To learn how aerosol particles form in the Amazon, Mary Gilles of the Chemical Sciences Division at the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) and David Kilcoyne of the Lab’s Advanced Light Source (ALS) worked with Christopher Pöhlker of Germany’s Max Planck Institute for Chemistry (MPIC) as part of an international team of scientists led by MPIC’s Meinrat Andreae and Ulrich Pöschl. They analyzed samples of naturally formed aerosols collected above the forest floor, deep in the rainforest. (more…)

Lichens May Aid in Combating Deadly Chronic Wasting Disease in Wildlife

MADISON, Wis. – Certain lichens can break down the infectious proteins responsible for chronic wasting disease (CWD), a troubling neurological disease fatal to wild deer and elk and spreading throughout the United States and Canada, according to U.S. Geological Survey research published today in the journal PLoS ONE.

Like other “prion” diseases, CWD is caused by unusual, infectious proteins called prions. One of the best-known of these diseases is “mad cow” disease, a cattle disease that has infected humans. However, there is no evidence that CWD has infected humans. Disease-causing prions, responsible for some incurable neurological diseases of people and other diseases in animals, are notoriously difficult to decontaminate or kill. Prions are not killed by most detergents, cooking, freezing or by autoclaving, a method used to sterilize medical instruments. (more…)

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Salt Seeds Clouds in the Amazon Rainforest

Lichens May Aid in Combating Deadly Chronic Wasting Disease in Wildlife