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Read the latest issue of Research and Creative Activity magazine, "Humanities, Then and Now."
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When light conditions change, the bacterium Fremyella diplosiphon can shift its pigment production to capture more light energy. Here, "blind" mutants (red) unable to respond to changing light grow amid sea of normal colonies(green)
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Learn about great white sharks with A Moment of Science.
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Geography Department Seminar Series
February 9, 2007
4 p.m.
Student Building, Room 150 IUB
Refreshments served at 3:30 p.m.
Dr. Gregory S. Jenkins, associate professor in physics and graduate director for the Howard University Program in Atmospheric Sciences. Dr. Jenkins is a member of the NASA Research Team on Hurricanes and studies climate change and pollution issues.
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Scientist at work: Katy Borner
Together with her collaborators, Indiana University School of Library and Information Science Associate Professor Katy Börner designs exquisite maps of science as a novel means to navigate, manage, and utilize scholars' collective knowledge. Börner is a curator of the Places & Spaces: Mapping Science exhibit, currently on display at the New York Hall of Science (see http://scimaps.org). Maps of science can show where the infrastructure of a specific research industry exists, along with where ideas, research, and innovations are created. "The exhibit introduces people to the power of maps to navigate physical spaces but also abstract spaces of our collective scholarly knowledge," said Börner.
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Water scarcity is slowly becoming a fact of life in increasingly large areas. One way to make better use of scarce water resources would be to retain more of the water that falls during a heavy rain. To accomplish this, better understanding is needed about how water behaves in the environment. Constance Brown, a micrometeorologist in the Atmospheric Science Program of Indiana University's Department of Geography, is one of the scientists working to provide this understanding. In a forthcoming paper in the Journal of Arid Environments, she reports the first results of a study designed to characterize the surface exchanges of water and carbon dioxide in a forest in the Santa Catalina Mountains near Tucson, Ariz.
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A hormone implicated in the onset of human puberty also appears to control reproductive activity in seasonally breeding rodents, report Indiana University Bloomington and University of California at Berkeley scientists in the March 2007 issue of Endocrinology. The paper is now accessible online via the journal's rapid electronic publication service. The researchers present evidence that kisspeptin, a recently discovered neuropeptide encoded by the KiSS-1 gene, mediates the decline of male Siberian hamsters' libido and reproduction as winter approaches and daylight hours wane.
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The function of horned beetles' wild protrusions has been a matter of some consternation for biologists. Digging seemed plausible; combat and mate selection, more likely. Even Charles Darwin once weighed in on the matter, suggesting -- one imagines with some frustration -- the horns were merely ornamental. Recently, Indiana University Bloomington scientists presented an entirely new function for the horns: during their development, Onthophagus horned beetles use their young horns as a sort of can opener, helping them bust out of thick larval shells.
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Adolescents who play violent video games may exhibit differences in activity levels in areas of the brain associated with emotional arousal and self-control, according to new research at the Indiana University School of Medicine and announced Nov. 28 at the Radiological Society of North America's annual meeting in Chicago. The study randomly assigned 44 adolescents to play either a violent video game or a nonviolent but equally fun and exciting video game for 30 minutes.
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Some recent titles by IU researchers
"A phase I, pharmacokinetic and pharmacodynamic dose escalation trial of weekly paclitaxel with interferon-alpha2b in patients with solid tumors," Cancer Chemotherapy and Pharmacology, Vol. 59, no. 2 (Feb. 2007), by B. Schneider et al
"Amplification of lac cannot account for adaptive mutation to Lac in Escherichia coli," Journal of Bacteriology, e-published Jan. 5, 2007, by J.D. Stumpf et al
Protein Expression in a Drosophila Model of Parkinson's Disease," Journal of Proteome Research, Vol. 5, no. 6 (Jan. 2007), by Z. Xun et al
"DroSpeGe: rapid access database for new Drosophila species genomes," Nucleic Acids Research, vol. 35 (Jan. 2007), by Don Gilbert
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