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University of Alberta Researchers Find That Oil Sands Industry Is Releasing More Pollutants Into Athabasca River System Than Previously Estimated

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New research from a team at the University of Alberta, Canada, finds that Alberta’s oilsands industry is releasing more pollutants into the Athabasca River, its tributaries and its watershed than previously estimated. An open access article on their study was published online in the journal Proceedings of the National Academy of Sciences.

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A Brief History of the World’s First Planetarium

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The other would show the Ptolemaic, or geocentric, sky, with the viewer fully immersed in the view, as if standing on the surface of the Earth, seemingly at the center of the universe. The Zeiss Model I displayed 4,500 stars, the band of the Milky Way, the sun, moon, Mercury, Venus, Mars, Jupiter, and Saturn.

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Taking the Measure of the Earthquake That Destroyed Tokyo

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Palmieri’s seismograph consisted of U-shaped tubes filled with mercury. When the ground shook, the mercury would close an electrical circuit and stop an attached clock. An abridged version of this article appears in the September 2023 print issue as “The Earthquake That Was Too Big to Measure.”

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Process for Hydrogen Production from Sodium Sulfite Solutions Resulting from Capture of SO2 from Coal Flue Gas

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under illumination from a low pressure mercury lamp. Article ASAP doi: 10.1021/es903766w. Results from using the ultraviolet (UV) photolytic process for production of hydrogen from aqueous Na 2 SO 3 solutions showed that the quantum efficiency of hydrogen production can reach 14.4% Cunping Huang, Clovis A.

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Indiana U study suggests cost-effectiveness of EPA air quality regs more uncertain than commonly believed

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A new study by researchers at Indiana University suggests the estimates are more uncertain than commonly accepted. The bulk of these regulations require national emissions standards for hazardous air pollutants; analysis includes the Mercury and Air Toxic Standards and the Cross State Air Pollution Rule. Good and John D.

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With this Ruby Laser, George Porter Sped up Photochemistry

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student in chemistry at the University of Cambridge in 1945, he found the equipment there “remarkably primitive,” as he told an interviewer in later life. George Porter’s flash of insight at a lighting factory On a trip to collect a mercury arc lamp for the searchlight, Porter saw flash lamps being made at a Siemens factory.

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Lotfi Zadeh and the Birth of Fuzzy Logic

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Fuzzy theory is wrong, wrong, and pernicious,” said William Kahan, a highly regarded professor of computer sciences and mathematics at the University of California at Berkeley in 1975. Kalman in 1972, who is now a professor at Florida State University in Tallahassee. This article was first published as “Lotfi A.