Navigation Links
Ironing out details of the carbon cycle
Date:7/3/2014

rth.

John and his colleagues have spent the past several years working to fill in those details. They've been collecting ocean samples and developing their analytical techniques for quantifying different natural isotopes of iron in seawater, which is one means of tracking the origins of the dissolved metal.

Iron finds its way into seawater from a variety of sources. The ratio of the stable natural isotopes iron-56 and iron-54 from these sources can differ from the ratio in the earth's crust because a number of chemical processes change the ratio by favoring the release of one of the two isotopes. The processes controlling release of iron from distinct sources vary, and so different sources can have characteristic iron-56/iron-54 ratios. Tiny variations in this ratio in seawater samples thus provide insight into the origin of the iron found there.

For example, one source is sediments from the ocean's floor, from which iron is typically released into the ocean under very low-oxygen (anoxic) conditions, and release of 'light' iron-54 is favored. Another source is dust from the atmosphere, from which Fe is typically released into the ocean with processes favoring 'heavy' iron-56. Using this information, the researchers were able to establish, for the first time, where dissolved iron in seawater had originated.

John and postdoctoral associate Tim Conway have developed a high-throughput means of purifying seawater samples and determining the iron-56/iron-54 ratio, a method capable of handling the nearly 600 samples they collected in a high-resolution transect of the north Atlantic Ocean on a GEOTRACES cruise.

From those samples, they were able to show in a paper published in the journal Nature that the largest source of iron in the north Atlantic, somewhere between 70 and 90 percent, comes from dust that blows in from the Sahara desert.

The results are helping define a very poorly understood but essential comp
'/>"/>

Contact: Steven Powell
spowell2@mailbox.sc.edu
803-777-1923
University of South Carolina
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Ironing out the link between H. pylori infection and gastric cancer
2. Report details efforts to improve, advance indoor microbial sampling
3. Study details essential role of trust in agricultural biotech partnerships
4. New book details the biological and cultural diversity of Khawa Karpo, sacred mountain of Tibet
5. Prehistoric ghosts revealing new details
6. Scientists discover new details about rice blast, a deadly plant fungus
7. Biologists uncover details of how we squelch defective neurons
8. Study details paired risk factors in preeclampsia
9. Demand for details on food labels includes the good -- and the bad
10. Wonder of Nanotechnology details research enabling nanoscale optoelectronic devices
11. Quantum effects help cells capture light, but the details are obscure
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/30/2015)... , June 30, 2015 Genisphere ... company as CEO to help further develop Genisphere,s therapeutics ... of partnering experience, having spent much of the last ... Therakine, Amgen, Baxter Bioscience, and Johnson & Johnson. Tom ... on Technology and Biotech Corporate Finance. He graduated from ...
(Date:6/25/2015)... N.J. , June 25, 2015  TAKE Solutions ... a patent by the United States Patent and Trademark ... Standardization". This process leverages TAKE Solutions, Clinical Accelerators to ... over 50% (when compared to standardization without the accelerators), ... At the heart of ...
(Date:6/24/2015)... 24, 2015 Biometry authentication provider KeyLemon ... password solution one face in. ... one face in, entering the expanding biometric authentication ... multifactor-authentication biometric answer to the password problem. With ... partnership with KeyLemon, one face in allows users ...
Breaking Biology News(10 mins):Genisphere Appoints New CEO, Thomas Bliss 2Genisphere Appoints New CEO, Thomas Bliss 3TAKE Solutions Awarded Patent By USPTO 2KeyLemon Announces Partnership With Biometric Password Solution onefacein 2
... patient lying on an operating table, while another student conducts ... a real OR or treatment room, except that the patients ... theyre robots., These high-tech, electronically outfitted mannequins are equipment in ... at the Johns Hopkins Outpatient Center in East Baltimore that ...
... the Institute of Pacific Islands Forestry have completed ... trees grow faster, while increasing biodiversity, carbon sequestration, ... forests. Acacia koa is a native Hawaian hardwood ... craft and furniture-making wood. Its range has ...
... important links between local and global ecosystems --- a ... figure in the rise of international ecology -- will ... The award, consisting of a $200,000 cash prize and ... environmental sciences at the University of Virginia, and Harold ...
Cached Biology News:Actor-robots 'staff' part of new $5M simulation training center 2Faster koa tree growth without adverse ecosystem effects 2Winners of 2008 Tyler Environmental Prize announced 2Winners of 2008 Tyler Environmental Prize announced 3
(Date:7/1/2015)... ... ... The next-generation sequencing (NGS) clinical market is poised for huge growth as it ... reveals in its new report that the market drivers of this vibrant industry include ... better diagnostics as part of a molecular diagnostics trend. , The global market is ...
(Date:7/1/2015)... 1, 2015   Neuraltus Pharmaceuticals, Inc. , a ... groundbreaking drugs to treat neurodegenerative diseases such as ... Robert G. Miller , M.D., Director of the Forbes ... Pacific Medical Center in San Francisco, has been awarded ... million to help fund a Phase 2 clinical ...
(Date:7/1/2015)... July 1, 2015 Isagenix International, a leading ... three Gold, three Silver, and three Bronze Stevie® Awards ... in Chicago this month.The ... business awards program in the U.S. ... strength in developing leaders, cultivating talent, creating a unified ...
(Date:7/1/2015)... PHILADELPHIA , July 1, 2015 ... technology will ... s evidence-based clinical s olutions suite ... scientific, technical and medical information products and services, announced today ... -based clinical decision support (CDS) technology company. InferMed,s ...
Breaking Biology Technology:NGS-Based Diagnostics, the ‘Must-Have Platform’, Sends Market Segment CAGRs Soaring According to BCC Research 2NGS-Based Diagnostics, the ‘Must-Have Platform’, Sends Market Segment CAGRs Soaring According to BCC Research 3Investigator to Receive $1.5 Million Grant from the ALS Association to Help Fund Confirmatory Phase 2 Study of Neuraltus Pharmaceuticals' NP001 2Investigator to Receive $1.5 Million Grant from the ALS Association to Help Fund Confirmatory Phase 2 Study of Neuraltus Pharmaceuticals' NP001 3Investigator to Receive $1.5 Million Grant from the ALS Association to Help Fund Confirmatory Phase 2 Study of Neuraltus Pharmaceuticals' NP001 4Isagenix Earns Nine American Business Awards 2Isagenix Earns Nine American Business Awards 3Elsevier Acquires InferMed, Provider of Clinical Decision Support Technology 2Elsevier Acquires InferMed, Provider of Clinical Decision Support Technology 3Elsevier Acquires InferMed, Provider of Clinical Decision Support Technology 4
... reacts to CMS final rule; ... identifies challenges, recommends strategies, MUNDELEIN, ... International Expert Wound Care Advisory Panel announce the ... Prevention and Treatment: Implications of the CMS Inpatient ...
... MedImmune today announced,that researchers will present ... the Annual Meeting of the American Thoracic ... Toronto, Canada. Presentations are designed to showcase,MedImmune,s ... finding innovative solutions that may one,day help ...
... MTA: CTIC) management will present at the Rodman & Renshaw ... AM in the,Atlantique Salon, Meridional at the Le Meridien Beach ... live with slides, and available,for replay after the presentation. The ... Rodman & Renshaw 5th ...
Cached Biology Technology:International Wound Care Experts, Medline Announce Pressure Ulcer Prevention Consensus Paper 2International Wound Care Experts, Medline Announce Pressure Ulcer Prevention Consensus Paper 3Depth of MedImmune's Respiratory Disease Research Program Highlighted at Annual Meeting of the American Thoracic Society 2
... Quantitation Kit is one of the ... quantitation of RNA in solution. ... sensitive than absorbance measurements. As little ... with fluorescence microplate readers and fluorometers ...
Request Info...
Recommend to use at up to 5000X dilutions for cell culture (e.g. Add 1 ul to 1 ml of culture medium.)...
... purified from egg white. The extinction coefficient , ... in 10 mM phosphate-buffered saline, pH ... sodium azide and 50% glycerol. Avidin (from egg ... is purified by molecular sieving and ...
Biology Products: