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An amazing ancient traces of life discovered encased in a 2.5 billion year old ruby.
$50+ USD por hora
Publicado hace 1 minuto
SciTechDaily - Science, Space and Technology News 2021 Earth Ancient Traces of Life Discovered Encased in a 2.5 Billion-Year-Old Ruby By University of Waterloo on Oct 24, 2021 Ruby Linked to Early Life Photo of the ruby that this study analyzed. Credit: University of Waterloo While analyzing some of the world’s oldest colored gemstones, researchers from the University of Waterloo discovered carbon residue that was once ancient life, encased in a 2.5 billion-year-old ruby. The research team, led by Chris Yakymchuk, professor of Earth and Environmental Sciences at Waterloo, set out to study the geology of rubies to better understand the conditions necessary for ruby formation. During this research in Greenland, which contains the oldest known deposits of rubies in the world, the team found a ruby sample that contained graphite, a mineral made of pure carbon. Analysis of this carbon indicates that it is a remnant of early life. “The graphite inside this ruby is really unique. It’s the first time we’ve seen evidence of ancient life in ruby-bearing rocks,” says Yakymchuk. “The presence of graphite also gives us more clues to determine how rubies formed at this location, something that is impossible to do directly based on a ruby’s color and chemical composition.” The presence of the graphite allowed the researchers to analyze a property called isotopic composition of the carbon atoms, which measures the relative amounts of different carbon atoms. More than 98 percent of all carbon atoms have a mass of 12 atomic mass units, but a few carbon atoms are heavier, with a mass of 13 or 14 atomic mass units. “Living matter preferentially consists of the lighter carbon atoms because they take less energy to incorporate into cells,” said Yakymchuk. “Based on the increased amount of carbon-12 in this graphite, we concluded that the carbon atoms were once ancient life, most likely dead microorganisms such as cyanobacteria.” The graphite is found in rocks older than 2.5 billion years ago, a time on the planet when oxygen was not abundant in the atmosphere, and life existed only in microorganisms and algae films. During this study, Yakymchuk’s team discovered that this graphite not only links the gemstone to ancient life but was also likely necessary for this ruby to exist at all. The graphite changed the chemistry of the surrounding rocks to create favorable conditions for ruby growth. Without it, the team’s models showed that it would not have been possible to form rubies in this location. The study, “Corundum (ruby) growth during the final assembly of the Archean North Atlantic Craton, southern West Greenland,” was recently published in Ore Geology Reviews. A companion study, “The corundum conundrum: Constraining the compositions of fluids involved in ruby formation in metamorphic melanges of ultramafic and aluminous rocks,” was published in the journal Chemical Geology in June. References: “Corundum (ruby) growth during the final assembly of the Archean North Atlantic Craton, southern West Greenland” by Chris Yakymchuk, Vincent van Hinsberg, Christopher L. Kirkland, Kristoffer Szilas, Carson Kinney, Jillian Kendrick and Julie A.Hollis, 20 August 2021, Ore Geology Reviews. DOI: 10.1016/j.oregeorev.2021.104417 “The corundum conundrum: Constraining the compositions of fluids involved in ruby formation in metamorphic melanges of ultramafic and aluminous rocks” by Vincent van Hinsberg, Chris Yakymchuk, Angunguak Thomas Kleist Jepsen, Christopher L.Kirkland and Kristoffer Szilas, 20 March 2021, Chemical Geology. DOI: 10.1016/j.chemgeo.2021.120180 GeologyMicrobiologyUniversity of Waterloo Share Related Posts Oct 07, 2021 Sedimentary Repositories Suggest Environmental Variability Driven by Changes in Earth’s Orbit Geological Society of America Oct 03, 2021 MIT Scientists Zero In on the Origins of Earth’s “Single Most Important Evolutionary Innovation” Jennifer Chu, Massachusetts Institute of Technology Sep 28, 2021
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We need an experienced writer to work with our team, who can make help docs for my application. We need an experienced writer to work with our team, who can make help docs for my application.
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Hi. I'm estimating loss mechanisms in heliostat fields. There are 5 loss mechanisms I'm investigating, with 3 already completed. The fourth mechanism is the spillage loss, which is provided by the mathematical HFLCAL model. It requires a 3-D vector integration along a receiver plane to provide the intercepted power at a certain point in time, which will be an efficiency value. This will be applied to a CSV file with locations of numerous heliostats. Thank you. Deliverables: - Provide working python script for HFCAL mathematical model - Applies spillage loss mechanism to CSV list of field of heliostats to result in percentage efficiency of each. - Can be applied to other efficiency calculations to result in overall/total efficiency for each heliostat.
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Task distribution reliability assessment without capacity limitations. This should contain calculating for set of complete load point and system reliability indices, including EIC using customer sector damage functions. All calculations should be designed in excel, where calculations are systematically and clearly be done and can be followed using spread sheet More details when you bid
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Looking for PHP developers to create a function that would pixelfy an image. Reference Sites - https://pixelate.imageonline.co/ https://pinetools.com/pixelate-effect-image
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We currently running 2 transcriptions, one for German and one for Polish. We are looking for team members to join the project, ideally we are looking for people who can commit time to this project every day. This is a long term project will last 3-5 months, so great opportunity for people who are looking for temporary work. There is absolutely no previous experience required, but you must be a native German or Polish speaker and have got plenty of free time. This is remote working, you decide when to start and when to finish your day. If you are interested then drop me a message
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Hi need help with python .
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Someone help me with python learning its simple just need someones time..thanks
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