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:8/1/2014)... Research and Markets has announced the addition ... and Analysis Market 2014-2018" report to their offering. ... Single Nucleotide Polymorphism (SNP) genotyping is the screening and ... of various species. SNPs are commonly present in all ... analyze thousands of SNPs and has the potential for ...
(Date:8/1/2014)... 01, 2014 Testing the mechanical ... a better understanding embryonic development. How and ... structurally and functionally distinct tissues is important because ... Prof. Todd McDevitt, Melissa Kinney, and Rabbia Saeed ... with biochemical cues to control many aspects of ...
(Date:7/31/2014)... There,s a good reason people over 60 are not ... ages and weakens with time, making the elderly prone ... San Francisco research team now has discovered a reason ... for the inability of blood-forming cells to maintain blood ... identified molecular defects that could be restored for rejuvenation ...
(Date:7/31/2014)... , July 31, 2014 The ... today with $25,000 to fund a translational research ... in 2011, the gift was presented at the ... Annual Meeting in Colorado Springs, CO. ... in neurointerventional approaches to neurovascular conditions, SNIS formed ...
Breaking Biology Technology:Global Single Nucleotide Polymorphism (SNP) Genotyping and Analysis Market 2014-2018 2Study Links Biomechanics and Gene Expression in Stem Cells 2Key to aging immune system is discovered 2SNIS Foundation Bestows First Grant Award For Cutting-Edge NeuroInterventional Research 2SNIS Foundation Bestows First Grant Award For Cutting-Edge NeuroInterventional Research 3
... nanometers in diameter, nanowires are often considered one-dimensional. ... that individual gallium nitride nanowires show strong piezoelectricity ... stress in three dimensions. The ... Nancy J. Farley Professor in Manufacturing and Entrepreneurship ...
... LABS, Inc., a global, full-service testing laboratory with ... for human organs, cells, tissues and implantable biologic products ... AABB Accreditation for donor testing. The voluntary accreditation program ... testing, distributing and administering blood and cellular therapy products. ...
... Inc., a company developing a revolutionary non-invasive test for ... today reported that it has achieved full automation of ... high-resolution 3D biosignatures from intact cells.  Development of the ... by a $2.6 million grant from the National Institutes ...
Cached Biology Technology:3-dimensional view of 1-dimensional nanostructures 2LABS, Inc. Earns AABB Accreditation for Donor Testing 2VisionGate Uses $2.6 Million NIH Grant to Achieve Full Automation of Cell-CT™ 3D Imaging System for Early Diagnosis of Cancer 2VisionGate Uses $2.6 Million NIH Grant to Achieve Full Automation of Cell-CT™ 3D Imaging System for Early Diagnosis of Cancer 3VisionGate Uses $2.6 Million NIH Grant to Achieve Full Automation of Cell-CT™ 3D Imaging System for Early Diagnosis of Cancer 4
(Date:8/1/2014)... Aug. 1, 2014  LiveScan Service Provider Binary Biometrics is pleased ... a result, Binary Biometrics will improve its mobile service capabilities and add more ... County and service several new cities such as, but not limited ... DeLand , Deltona , Edgewater ... New Smyrna Beach , Oak Hill , ...
(Date:7/31/2014)... over a decade ago, prestin was found to be a ... a protein found in the hair cells of the inner ... help the cochlea, like an antique phonograph horn, amplify sound ... a new study published in the advanced online edition of ... have shown that prestin has also independently evolved to play ...
(Date:7/31/2014)... tracing nearly 3,000 genes to the earliest common ... scientists have created an extensive "Tree of Lepidoptera" ... DNA sequencing. , Among the study,s more ... small moths than to large ones, which completely ... study also found that some insects once classified ...
Breaking Biology News(10 mins):Binary Biometrics, Founded by James Timothy White, Expands Services to 13+ Locations With the Addition of Owner/Operator Kevin Morris 2Binary Biometrics, Founded by James Timothy White, Expands Services to 13+ Locations With the Addition of Owner/Operator Kevin Morris 3UF study advances 'DNA revolution,' tells butterflies' evolutionary history 2UF study advances 'DNA revolution,' tells butterflies' evolutionary history 3
... in the Houston area with an added element: the ... U.S. Department of Education has awarded a $2.6 million, ... Center,s Children,s Learning Institute (CLI) to combine two programs ... for kindergarten. The two research-proven programs are ...
... how changes to a frog,s immune system may be the ... populations across the UK. Communities of common frogs ... which is estimated to be killing tens of thousands of ... ponds, the surrounding lawn becomes strewn with dead frogs, some ...
... surrounds cells of the Clostridium difficile superbug, and ... and tissues, is revealed in part in the 1 March ... that unravelling the secrets of this protective layer,s molecular structure ... C. difficile infections. The ,jacket, is a surface ...
Cached Biology News:Study to evaluate success of parental involvement in early childhood education 2Frog's immune system is key in fight against killer virus 2Scientists unlock the secrets of C. difficile's protective shell 2
... a fixative useful for routine procedures. Hollandes ... stable and will decalcify small bone specimens. ... be stained successfully with most stains, and ... red blood cell membranes and cosinophil and ...
Chicken polyclonal antibody to Glutathione-S-Transfrease (GST)...
... the complete enterprise microarray informatics platform for microarray ... Acuity once and use it forever without paying ... Quality Acuity has all the analysis tools ... data, from quality control statistics and normalization, all ...
... As the world of discovery races ever ... you on the fast track. So our constant ... help accelerate your research. Thats why our Biomek ... platform thats as advanced as it is flexible. ...
Biology Products: