Navigation Links
International team of scientists discover clue to delay of life on Earth
Date:3/26/2008

tinues Anbar. Eukaryotes depend on bacteria having an easy enough time fixing nitrogen that theres enough to go around. So if bacteria were struggling to get enough molybdenum, there probably wouldnt have been enough fixed nitrogen for eukaryotes to flourish.

These molybdenum depletions may have retarded the development of complex life such as animals for almost two billion years of Earth history, says Lyons. The amount of molybdenum in the ocean probably played a major role in the development of early life.

This research was motivated by a review article published in Science in 2002 by Anbar and Andy Knoll, a colleague at Harvard University. Knoll was perplexed by the fact that eukaryotes didnt dominate the world until around 0.7 billion years ago, even though they seemed to have evolved before 2.7 billion years ago. Together, Anbar and Knoll postulated that molybdenum deficiency was the key, arguing that the metal should have been scarce in ancient oceans because there was so little oxygen in the atmosphere in those times.

In todays high-oxygen world, molybdenum is the most abundant transition metal in the oceans. That is because the primary source of molybdenum to the ocean is the reaction of oxygen with molybdenum-bearing minerals in rocks. So the hypotheses rode on the idea that the amount of molybdenum in the oceans should track the amount of oxygen. To test that idea, Scott, Lyons and Anbar examined rock samples from ancient seafloors by dissolving them in a cocktail of acids and analyzing the rock for molybdenum content using a mass spectrometer. Many of these analyses were carried out using state-of-the art instrumentation in the W. M. Keck Foundation Laboratory for Environmental Biogeochemistry at Arizona State University. The scientists found significant evidence for a molybdenum-depleted ocean relative to the high levels measured in modern, oxygen-rich seawater.

By studying Earths ancient oceans, atmosphere and biolog
'/>"/>

Contact: Nikki Staab
nstaab@asu.edu
480-727-9329
Arizona State University
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Intellect Neurosciences, Inc. to Present Data on Alzheimers Vaccine at 13th International Congress of Immunology Conference
2. The Government of Quebec and the New Canadian Government Invest in the Creation of an International Biobank
3. International Isotopes Inc. Announces Completion of an Exclusive Distributor Agreement for Sales of New Style Transportation Containers
4. Arrow International Files and Mails Definitive Proxy Materials
5. Niceware International Announces Licensed Vendor Status with ICCBBA, Inc. to Provide ISBT 128-compliant Software
6. DuPont, Genencor International and Tate & Lyle Honored for Groundbreaking Work in Developing Bio-PDO(TM)
7. Viragen International to Reverse Split Its Common Stock
8. Tutogen Medical, Inc. and Zimmer Holdings, Inc. Announce Agreement for International Distribution of Biological Products
9. Zimmer and Tutogen Announce Agreement for International Distribution of Biological Products
10. PAREXEL International to Present at Thomas Weisel Partners Healthcare Conference
11. Biosafety and Biosecurity International Conference 2007 to be held in Abu Dhabi from November 12 to 14
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/24/2014)... NEW YORK , Dec. 23, 2014  NeuroLifeSciences ... of mazindol in children with attention deficit/hyperactivity disorder published ... 2014 . The paper, titled "Pilot ... deficit/hyperactivity disorder" ( Konofal et al, Drug ... 2014 ) shows that mazindol might be an ...
(Date:12/22/2014)... , Dec. 22, 2014 /PRNewswire/ - RepliCel Life ... regenerative medicine company focused on the development of autologous ... out of the University of Calgary in conjunction with ... Carolina, which further validates the company,s ongoing clinical research ... effects of pattern baldness. The paper entitled ...
(Date:12/22/2014)... 2014  ( www.competitivehealth.com ) — Competitive Health is ... review and advocacy service, has signed an agreement to ... discount health services marketplace. 63% of Americans ... they expected to pay. As part of an ongoing ... Savings is pleased to offer medical bill review and ...
(Date:12/22/2014)... Fertility Associates of Memphis has announced a new ... network of more than 20 contributing fertility practices ... access to a national pool of frozen donor ... of Memphis is the only fertility clinic in the ... Dr. William Kutteh , director of Fertility Associates of ...
Breaking Biology Technology:Redefining ADHD: A New Approach & A Shift of Paradigm in ADHD Therapeutics 2Redefining ADHD: A New Approach & A Shift of Paradigm in ADHD Therapeutics 3Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 2Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 3Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 4Newly Released Peer-Reviewed Publication Further Validates RepliCel's Use of Dermal Sheath Cup Cells to Treat Pattern Baldness 5WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3
... Program Called ... ... GEN),announced today a new pre-clinical antibody program called HuMax-CD32b(TM).,This fully ... and hematological tumors. HuMax-CD32b may have therapeutic potential,in the treatment ...
... of gallons of hazardous waste resulting from the nations ... southeastern Washington state called Hanford. Beneath this desert ... of thousands of tons of chemicals are captured within ... complex subsurface flow paths. These paths create uncertainties ...
... 3 /Xinhua-PRNewswire/ -- WuXi PharmaTech (NYSE:,WX), China,s premier provider ... that it has promoted Mr. Edward Hu from Executive,Vice ... to joining WuXi PharmaTech in August 2007, Mr. Hu ... Tanox, Inc., a NASDAQ listed,company later acquired by Genentech, ...
Cached Biology Technology:Genmab Announces HuMax-CD32b Pre-Clinical Program 2Genmab Announces HuMax-CD32b Pre-Clinical Program 3Where does stored nuclear waste go? 2WuXi PharmaTech (NYSE: WX) Promotes Edward Hu to COO 2
(Date:12/10/2014)... Dec. 9, 2014 CIE San Diego has ... provides the connective tissue that enhances care coordination among ... easily share client-level information; earned a second $1 million ... organizations serving seniors aging in community and; will be ... December 11 th 4-6p. CIE San ...
(Date:12/10/2014)... California , December 9, 2014 ... with ITN,s BCARD Platform   ... cloud-based enterprise meeting scheduling solutions for business-to-business (B2B) ... the world leader in mobile near-field communication (NFC), ...      (Logo: http://photos.prnewswire.com/prnh/20140612/691055) , ...
(Date:12/5/2014)... 2014  Tute Genomics, a leader in cloud-based solutions ... A1 funding led by UK-based Eurovestech. Peak Ventures and ... investment round. "We are at a pivotal ... sequencing and seeks new approaches for the diagnosis, treatment ... MD MBA, and CEO of Tute Genomics. "One of ...
Breaking Biology News(10 mins):Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 2Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 3Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 2Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 3
... WI, JUNE 30, 2011 -- Agroforestry, the deliberate placement ... capture substantial amounts of carbon on agricultural lands while ... tools for accurately estimating current and projected carbon values ... an effective carbon-capturing option. Only occupying about 2 to ...
... scientific results from an ambitious voyage led by a group ... San Diego offer a stark view of human pollution and ... been labeled as the "Great Pacific Garbage Patch." Two ... or SEAPLEX, found evidence of plastic waste in more than ...
... HFES invites you to register to attend the 55th ... Red Rock Hotel in Las Vegas! Early bird discounts ... the Registration Information page at http://www.hfes.org/web/HFESMeetings/2011registration.html for ... more. Online registration is available at http://tinyurl.com/3drb8hz . ...
Cached Biology News:Scripps study finds plastic in 9 percent of 'garbage patch' fishes 2Scripps study finds plastic in 9 percent of 'garbage patch' fishes 3HFES 2011 registration is now open 2
...
Anti-VDAC (Voltage-Dependent Anion Channel) AVOID FREEZE/THAW CYCLES. Recognizes the porin 31HL protein. Corresponds to mAb 1 in the literature....
This spacer is required to use the Miniature FRENCH Pressure Cell (FA-003) with the Laboratory Press....
... DNase I Amplification Grade ... DNA to oligodeoxyribonucleotides. The ... units/mg. DNAse I Amplification ... and tested for absence ...
Biology Products: