Science & Technology

Image courtesy of Doug WiensDouglas Wiens (left), and a colleague ready equipment to emplace seismographs in Antarctica during a 2001 expedition.A seismologist at Washington University in St. Louis along with colleagues at Pennsylvania State University and Newcastle University in the United Kingdom have found seismic signals from a giant river of ice in Antarctica that make California’s earthquake problem seem trivial. Douglas A. Wiens, Ph.D., professor of earth and planetary sciences in Arts & Sciences, and colleagues combined seismological and global positioning system (GPS) analyses to reveal two bursts of seismic waves from an ice stream in Antarctica every day, each one equivalent to a magnitude seven earthquake.

Researchers at Washington University in St. Louis are the first to identify two proteins responsible for mechanosensitive ion channel activities in plant roots. Scientists have long known that plant cells respond to physical forces. Until now, however, the proteins controlling the ion channel response remained a mystery.

Raymond E. Arvidson, Ph.D., the James S. McDonnell Distinguished University Professor and chair of the earth and planetary sciences department in Arts & Sciences at Washington University in St. Louis, and a number of his student and personnel have major roles in the Phoenix mission to Mars. The space craft lands in the northern plains on May 25, 2008, and Arvidson is a key operations manager during the critical first week of operations. (Video available)

QuatranoRalph S. Quatrano, Ph.D., the Spencer T. Olin Professor and chair of the Washington University Department of Biology, has been named interim dean of the faculty of Arts & Sciences effective July 1, 2008, according to Chancellor Mark S. Wrighton. He succeeds Executive Vice Chancellor Edward S. Macias, Ph.D., dean of Arts & Sciences and the Barbara and David Thomas Distinguished Professor in Arts & Sciences.

Researchers at Washington University in St. Louis have gained the first detailed insight into the way circadian rhythms govern global gene expression in Cyanothece, a type of cyanobacterium (blue-green algae) known to cycle between photosynthesis during the day and nitrogen fixation at night.

Two seismologists at Washington University in St. Louis think the New Madrid Fault may have seen its day and the Wabash Fault is the new kid on the block. “I think everyone’s interested in the Wabash Valley Fault because a lot of the attention has been on the New Madrid Fault, but the Wabash Valley Fault could be the more dangerous one, at least for St. Louis and Illinois,” said Doug Wiens, professor of earth and planetary sciences in Arts & Sciences. “The strongest earthquakes in the last few years have come from the Wabash Valley Fault, which needs more investigation.”

A team of researchers from Washington University and the Israeli Institute of Technology (Technion) in Haifa, Israel, has developed a technique to detect the ancestry of disease genes in hybrid, or mixed, human populations.

David Kilper/WUSTL PhotoMuthanna Al-Dahhan (left) and graduate student Rajneesh Varma are researching effective ways to take agricultural waste and make biofuel out of it.Engineers at Washington University in St. Louis, using an impressive array of imaging and tracking technologies, have determined the importance of mixing in anaerobic digesters for bioenergy production and animal and farm wastes treatment. They are studying ways to take “the smell of money,” as farmers long have termed manure’s odor, and produce biogas from it.

Peter H. Raven, Ph.D., the George Engelmann Professor of Botany in Arts & Sciences and director and president of the Missouri Botanical Garden, will present a talk on “A Sustainable World: What It Means to Us” at 2 p.m. Friday, April 18, in Whitaker Hall auditorium on the Danforth Campus at Washington University in St. Louis.

Patterns in the Midwest this spring are eerily reminiscent of 1993 and 1994, back-to-back years of serious flooding. But Midwesterners have not learned “geologic reality,” says Robert E. Criss, Ph.D., professor of earth and planetary sciences in Arts & Sciences.