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Washington University in St. Louis News & Information > University Groups > Arts & Sciences >
Biology
'McDonaldization' of frogs
Frog fungus hammering biodiversity of communities
Sept. 22,
2009 --
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| Photo by Roberto Brenes |
| Tiny frog killed by invasive fungus. |
Everyone knows that frogs are in trouble. But a recent analysis by Washington University in St. Louis researchers of data on Central American frogs collected by a University of Maryland colleague shows the situation is worse than had been thought. Under pressure from an invasive fungus, the frogs in this biodiversity hot spot are undergoing "a vast homogenization" that is leaving behind simpler communities that increasingly resemble one another. "We're witnessing the McDonaldization of the frog communities," comments Kevin G. Smith, Ph.D., the lead author of the analysis and associate director of Washington University's Tyson Research Center, a site the fungus has also reached.
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Achieving a very small carbon footprint
Chase and Hellmuth discuss the trials and tribulations of building one of the greenest structures in North America
Sept. 17,
2009 -- The new Living Learning Center at Tyson Research Center was designed to be one of the greenest buildings in North America. Jonathan Chase, associate professor of biology in the Department of Biology and Environmental Studies in Arts & Sciences and Tyson's director; and Daniel Hellmuth, principal and co-founder of Hellmuth & Bicknese Architects, L.L.C., will deliver a talk about the Center and its challenges for the Assembly Series at 5 p.m. Thursday, September 24 in Wilson Hall Room 214. The program is free and open to the public.
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20,000 neurons keep steady time when working together
WUSTL research finds individual cells isolated from the biological clock can keep daily time, but are unreliable
Sept. 9,
2009 --
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| An isolated nerve cell busy keeping time. |
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Researchers at Washington University in St. Louis have shown that individual cells isolated from the biological clock can keep daily time all by themselves. However, by themselves, they are unreliable. The neurons get out of synch and capriciously quit or start oscillating again. The biological clock, a one-square millimeter area of the brain just above the roof of the mouth and atop the crossing of the optic nerves, comprises about 20,000 neurons. These cells, remarkably, contain the machinery to generate daily, or circadian, rhythms in gene expression and electrical activity. But the individual cells are sloppy and must communicate with one another to establish a coherent 24-hour rhythm.
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Doing rice right
Traditional Thai hill farmers help preserve genetic diversity of rice
July 27,
2009 --
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| National Science Foundation |
Traditional rice cultivation methods practiced in the isolated hillside farms of Thailand are helping preserve the genetic diversity of rice, one of the world's most important food crops, according to a new study by researchers at Washington University in St. Louis and Chiang Mai University in Thailand.
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Developing 'next generation of creative thinkers'
Free science camp for middle schoolers from traditionally underrepresented populations
June 12,
2009 --
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| WUSTL Photo Services |
| WUSTL's ExxonMobil Bernard Harris Summer Science Camp |
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Washington University in St. Louis will host its third ExxonMobil Bernard Harris Summer Science Camp June 14-26. The Danforth Campus will welcome 48 middle schoolers from traditionally underrepresented populations who are academically qualified, recommended by their teachers and genuinely interested in math and science. The free residential camp gives students a first-hand experience with experiments, role models and innovative programs to encourage their continued participation in math and science courses in school. A special "ExxonMobil Media Day" will be held from 9:30-11:30 a.m. June 17 at the Mallinckrodt Center, lower level. Campers will work side by side with scientists to complete an engineering challenge.
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Living Building Challenge
What could be one of North America's greenest buildings opened May 29
June 2,
2009 --
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| Joe Angeles/WUSTL Photo |
| The Living Learning Center |
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An opening ceremony for what could be one of North America's greenest buildings — a flagship building on the cutting edge of sustainable design and energy efficiency — was held May 29 at Washington University in St. Louis' new Living Learning Center at the university's Tyson Research Center. The Living Learning Center is a 2,900-square-foot facility built to meet the Living Building Challenge — designed to be the most stringent green building rating system in the world — of the Cascadia Region Green Building Council (CRGBC). No building has met its standard yet, but the Living Learning Center is in the running to be the first in North America.
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Living Building Challenge
What could be one of North America's greenest buildings set to open May 29
May 28,
2009 --
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| Photos courtesy Dan Hellmuth, Hellmuth Bicknese Architects |
| Tyson's own Eastern Red Cedar used for exterior siding |
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An opening ceremony for what could be one of North America's greenest buildings — a flagship building on the cutting edge of sustainable design and energy efficiency — will take place at 4 p.m. May 29 at Washington University in St. Louis' new Living Learning Center at the university's Tyson Research Center. The Living Learning Center is a 2,900-square-foot facility built to meet the Living Building Challenge — designed to be the most stringent green building rating system in the world — of the Cascadia Region Green Building Council (CRGBC). No building has met its standard yet, but the Living Learning Center is in the running to be the first in North America.
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'Biodiversity beyond the habitat's borders'
Plant biodiversity enhanced thanks to spillover from landscape corridors
May 22,
2009 --
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| Landscape in pine plantation forest. |
Researchers at Washington University in St. Louis, along with collaborators at three other universities, have discovered that the biodiversity in a patch of habitat can extend outside the borders of a protected area; this effect is magnified when corridors — skinny strips of land — connect the habitats. Their findings, reported in this week's online issue of the Proceedings of the National Academy of Sciences, provide a strategy for managing nature preserves to maximize biodiversity in the small spaces that are already formally protected.
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'Nurture, sustain a culture of scientific innovation'
Obama names WUSTL biologist to his science advisory council
May 7,
2009 --
President Obama has appointed Barbara A. Schaal, Ph.D., the Mary-Dell Chilton Distinguished Professor of biology in Arts & Sciences at Washington University in St. Louis and vice president of the National Academy of Sciences, to the President's Council of Advisors on Science and Technology.
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Birds of a feather
Study finds particles, molecules prefer not to mix
May 4,
2009 --
In the world of small things, shape, order and orientation are surprisingly important, according to findings from a new study by chemists at Washington University in St. Louis. Lev Gelb, WUSTL associate professor of chemistry, his graduate student Brian Barnes, and postdoctoral researcher Daniel Siderius, used computer simulations to study a very simple model of molecules on surfaces, which looks a lot like the computer game "Tetris." They have found that the shapes in this model (and in the game) do a number of surprising things.
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