Navigation Links
University of Miami scientist uncovers miscalculation in geological undersea record
Date:9/10/2008

VIRGINIA KEY, Fla. -- The precise timing of the origin of life on Earth and the changes in life during the past 4.5 billion years has been a subject of great controversy for the past century. The principal indicator of the amount of organic carbon produced by biological activity traditionally used is the ratio of the less abundant isotope of carbon, 13C, to the more abundant isotope, 12C. As plants preferentially incorporate 12C, during periods of high production of organic material the 13C/12C ratio of carbonate material becomes elevated. Using this principle, the history of organic material has been interpreted by geologists using the 13C/12C ratio of carbonates and organics, wherever these materials can be sampled and dated.

While this idea appears to be sound over the last 150 million years or so, prior to this time there are no open oceanic sediment records which record the 13C/12C ratio, and therefore, geologists are forced to use materials associated with carbonate platforms or epicontinental seas. In order to test whether platform-associated sediments are related to the global carbon cycle, a paper by University of Miami Professor Dr. Peter K. Swart appears in the Proceedings of the National Academy of Sciences. This paper examines changes over the past 10 million years at sites off the Bahamas (Atlantic Ocean), the Maldives (Indian Ocean), and Great Barrier Reef (Pacific Ocean). The variations in the 13C/12C ratio are synchronous at all of the sites studied, but are unrelated to the global change in the 13C/12C ratio.

It appears that records related to carbonate platforms which are often used throughout the early history of the Earth are not good recorders of the 13C/12C ratio in the open oceans. Hence, the work presented suggests that assumptions made previously about changes in the 13C/12C ratios of carbonate sediments in the geological record are incorrect.

"This study is a major step in terms of rethinkin
'/>"/>

Contact: Barbra Gonzalez
barbgo@rsmas.miami.edu
305-421-4704
University of Miami Rosenstiel School of Marine & Atmospheric Science
Source:Eurekalert

Page: 1 2

Related biology news :

1. A study by the MUHC and McGill University opens a new door to understanding cancer
2. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
3. University of Oregon researcher finds that on waters surface, nitric acid is not so tough
4. Bioengineers at University of Pennsylvania devise nanoscale system to measure cellular forces
5. Binghamton University researchers investigate evolving malaria resistance
6. Antioxidant to retard wrinkles discovered by Hebrew University researcher
7. Society for General Microbiology 161st Meeting, University of Edinburgh
8. Boston University biomedical engineers find chink in bacterias armor
9. KAUST and American University in Cairo to collaborate on research and academic development
10. UNH becomes first university in nation to use landfill gas as primary energy source
11. University of Minnesota study refutes belief that black men have more aggressive prostate cancer
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/23/2015)... 23, 2015   HOYOS Labs , a leading ... announced that the Company will demonstrate multiple biometrics-based technologies ... consumers at Connect:ID on March 23 through 25, 2015, ... will highlight the IEEE Biometric Open Protocol Standard; free ... enterprise access control system. BOPS was invented by HOYOS ...
(Date:3/20/2015)... 2015 Research and Markets ( ... "India Sensors Market Forecast and Opportunities 2020" ... sensor market is projected to grow at a ... electronics, automotive, industrial and healthcare sectors are the ... In addition, adoption of MEMS technology in sensors ...
(Date:3/20/2015)... 2015 Research and Markets ( http://www.researchandmarkets.com/research/vkzvcs/iris_biometrics ) ... Global Strategic Business Report" report to their offering. ... in US$ Thousands. The report provides separate comprehensive analytics for ... , Europe , Asia-Pacific ... Latin America . Annual estimates and ...
Breaking Biology News(10 mins):HOYOS Labs to Showcase Host of Biometrics Technologies at Connect:ID in Washington, D.C. 2HOYOS Labs to Showcase Host of Biometrics Technologies at Connect:ID in Washington, D.C. 3India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 2India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 3Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 2Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 3Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 4Iris Biometrics - Global Strategic Business Report 2015: System & Network Access Control - A Robust Market Opportunity in the Offing 5
... embryonic stem cell, which has the potential to become any ... of genes, proteins that bind DNA, and molecules that modify ... from MIT and the University of California at San Francisco ... cells into mature heart cells. The study, the first to ...
... A team of researchers that has been working ... within four years of a near-commercial-scale production level., The ... has received a $2 million National Science Foundation grant ... Devarenne, a Texas A&M AgriLife Research biochemist and collaborator ...
... ultrasound waves, MIT engineers have found a way to ... drug delivery more efficient. This technology could pave the ... to the researchers. "This could be used for ... systemic drugs and proteins such as insulin, as ...
Cached Biology News:Probing matters of the heart 2Probing matters of the heart 3Oil from algae closer to reality through studies by unique collaboration of scientists 2Oil from algae closer to reality through studies by unique collaboration of scientists 3Getting (drugs) under your skin 2Getting (drugs) under your skin 3
(Date:5/1/2015)... 2015 A new report by  ... will reach $22.4bn in 2019. That revenue forecast and ... Market Prospects 2015-2025 ,  published in March ... to provide forecasts and qualitative analyses of the antithrombotic ... consultancy in London, UK . It ...
(Date:5/1/2015)... Md. and RESEARCH TRIANGLE PARK, N.C. ... UTHR ) announced today that Roger Jeffs , ... provide an overview and update on the company,s business at ... in Boston, Massachusetts . The ... 3:30 PM Eastern Time, and can be accessed via a ...
(Date:4/30/2015)... Francisco, CA (PRWEB) April 30, 2015 Cytokinetics, ... the first quarter of 2015 were $4.4 million, compared to ... net loss for the first quarter was $8.9 million, or ... a net loss for the same period in 2014, of ... As of March 31, 2015, cash, cash equivalents and investments ...
(Date:4/30/2015)... 2015 The following is an open letter sent ... Cord Blood Corp (NYSE: CO ) from Jayhawk Capital. ... independent directors of China Cord Blood Corp (" China Cord ... per share from Golden Meditech Holdings Co Ltd ("Golden Med"). ... greatly benefit Golden Med and Mr. Kam, the Chairman of ...
Breaking Biology Technology:Antithrombotic Drugs: World Industry and Market Prospects 2015-2025 2Antithrombotic Drugs: World Industry and Market Prospects 2015-2025 3Antithrombotic Drugs: World Industry and Market Prospects 2015-2025 4Antithrombotic Drugs: World Industry and Market Prospects 2015-2025 5Cytokinetics, Incorporated Reports First Quarter 2015 Financial Results 2Cytokinetics, Incorporated Reports First Quarter 2015 Financial Results 3Cytokinetics, Incorporated Reports First Quarter 2015 Financial Results 4Cytokinetics, Incorporated Reports First Quarter 2015 Financial Results 5Cytokinetics, Incorporated Reports First Quarter 2015 Financial Results 6Cytokinetics, Incorporated Reports First Quarter 2015 Financial Results 7Cytokinetics, Incorporated Reports First Quarter 2015 Financial Results 8April 30, 2015 Open Letter to the Board of China Cord Blood Corp from Jayhawk Capital 2April 30, 2015 Open Letter to the Board of China Cord Blood Corp from Jayhawk Capital 3April 30, 2015 Open Letter to the Board of China Cord Blood Corp from Jayhawk Capital 4April 30, 2015 Open Letter to the Board of China Cord Blood Corp from Jayhawk Capital 5
... COVINA, Calif., May 16 StemCyte Inc. today announced,that ... company,overview with a focus on the StemCyte,s Indian joint ... Bhat will present during the session on "Stem ... the Art" on Saturday, May 17. His,presentation will include ...
... George Abercrombie, president,and chief executive officer, Hoffmann-La Roche ... today at a Rotary Club of Fort Worth ... businesses with challenges,unlike those anticipated with traditional emergency ... familiar with preparing for potential,disasters such as floods ...
... NEW YORK and HAIKOU, China, May 16 ... (OTC Bulletin Board: CPHI),which develops, manufactures, and ... announced today that it donated 2,million RMB ... anti- virus and anti-cold medicines to help ...
Cached Biology Technology:StemCyte Chief Scientific Officer to Present Company Overview with Focus on Indian Joint Venture at TiEcon 2008 2CEO Addresses Fort Worth Business Leaders About Developing Pandemic and Business Continuity Plans 2CEO Addresses Fort Worth Business Leaders About Developing Pandemic and Business Continuity Plans 3China Pharma Holdings, Inc. Donates Medicine for Sichuan Earthquake Relief 2
Request Info...
Request Info...
Prepared by multi-temperature ethanol fractionation with extensive charcoal treatment and dialysis.• Assay: ≥ 95 % (HPCE)• pH ~5.2 (10 mg/mL in 0.15 M NaCl)...
Special grade: for electrophoresis...
Biology Products: