"Less Bang, More Bubbles"
In May Mark S. Wochner and colleagues presented an underwater sound barrier to protect marine life. Their abstract, "Mitigation of low-frequency underwater sound using large encapsulated bubbles and freely rising bubble clouds" (pdf), is available from the Web site of the 161st Meeting of the Acoustical Society of America.

At the same meeting, Peter Dahl and colleagues presented several papers (pdf) on the acoustic properties of underwater pile driving.

"Cocaine's Newest Risks"
Doctors reported cases of the effects of a cocaine contaminant in "Toxic Effects of Levamisole in a Cocaine User," published June 16 in The New England Journal of Medicine, and "Characteristic purpura of the ears, vasculitis and neutropenia—a potential public health epidemic associated with levamisole-adulterated cocaine," published online June 11 in the Journal of the American Academy of Dermatology.

"Levamisole in the adjuvant treatment of colon cancer," published in Clinical Pharmacy in 1991, is an example of an older paper that hints that levamisole's effects may mimic cocaine's.

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