Navigation Links
Searching for the solar system's chemical recipe
Date:2/20/2013

the spacecraft's collectors were badly damaged when they crashed upon return to Earth.

Like oxygen, sulfur isotopes show up in different fractions in different solar system sources. Tracing their possible origins, the recent study of sulfur isotopes at beamline 9.0.2 began by flowing hydrogen sulfide gas the most abundant sulfur-bearing gas in the early solar system into a pressurized reaction chamber, where the synchrotron beam decomposed the gas and deposited elemental sulfur on "jackets" made of ultraclean aluminum foil.

The experiment was performed at four different VUV wavelengths, and the carefully stored aluminum jackets were taken to the Thiemens lab in San Diego, where Chakraborty and Jackson chemically extracted the sulfur and then measured its isotopes using Isotope Ratio Mass Spectrometry. In all samples the isotope compositions were found to be mass independent.

One source of fractionation in nature was photodissociation of hydrogen sulfide as the gas condensed to iron sulfide in the inner solar system, driven by intense 121.6-nanometer-wavelength ultraviolet light as the young star repeatedly shook with violent flares and upheavals. Different classes of meteorites and different parts of the same meteorites, such as their crust or various inclusions subsequently evolved different isotope ratios, depending on where and when in the solar system they formed. Sulfur compositions evolved independently from the way oxygen isotope compositions evolved.

The most recent target of research by the Thiemens group at beamline 9.0.2 is nitrogen, the seventh most abundant element in the solar system. On Earth, 99.63 of nitrogen is nitrogen-14, and nitrogen-15 is the remaining 0.37 percent. Measurements of the solar wind, carbonaceous meteorites, and other sources show wide swings in their proportions. The work is ongoing.

Says Musa Ahmed, "Tracking down how isotopic ratios may have evolved, we basically send thes
'/>"/>

Contact: Paul Preuss
paul_preuss@lbl.gov
510-486-6249
DOE/Lawrence Berkeley National Laboratory
Source:Eurekalert  

Page: 1 2 3 4 5

Related biology news :

1. EU project: Searching for exotics in the shrimp nets
2. Searching for the origin of muscles
3. Searching genomic data faster
4. UTSA anthropologist honored for contributions researching primates in Africa
5. A new dimension for solar energy
6. Folding light: Wrinkles and twists boost power from solar panels
7. Climatic effects of a solar minimum
8. Bay Area PV Consortium announces $7.5 million in grants to lower the cost of large-scale solar
9. Weizmann Institute solar technology to convert greenhouse gas into fuel
10. Anti-aging elixir for solar cells
11. ASU awarded $3 million to research solar energy technologies, launch energy Ph.D. program
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Searching for the solar system's chemical recipe
(Date:9/30/2014)... do seedless watermelon, salmon, and strawberries all have in ... two sets of chromosomes and are diploid, these organisms ... sets of chromosomesseedless watermelon and salmon have 3 and ... While this might seem surprising, in fact most ... first discovered over a century ago, but only recently, ...
(Date:9/30/2014)... engineers, led by Clemson University associate professor Brian ... from the U.S. Department of Energy,s Experimental Program ... positive impact on South Carolina in the advancement ... , "Understanding the scientific and engineering needs for ... nuclear technologies is imperative if South Carolina is ...
(Date:9/30/2014)... German . FRANKFURT. ... in the world. Because they grow underground, people use trained ... of truffles is not only of interest to gourmets. A ... the Goethe University Frankfurt have discovered that the smell of ... trapped inside truffle fruiting bodies. , White truffles from the ...
Breaking Biology News(10 mins):Gene doubling shapes the world: Instant speciation, biodiversity, and the root of our existence 2Gene doubling shapes the world: Instant speciation, biodiversity, and the root of our existence 3Gene doubling shapes the world: Instant speciation, biodiversity, and the root of our existence 4Researchers get $5.25 million to advance nuclear technologies in South Carolina 2On the trail of the truffle flavor 2
... have designated a group of 13 ... (leishmaniasis), African Sleeping Sickness (African trypanosomiasis), ... Filariasis (elephantiasis), Onchocerciasis (river blindness), Drancunculiasis ... Ulcer, Trachoma). , These diseases have ...
... inserted into blood vessels, to better deliver beneficial genes ... of inflammation that often negates initial benefits. The new ... thin layer to bare metal surfaces, may have potential ... of metallic implants. , Cardiologists frequently treat heart disease ...
... An international team of scientists for the first time ... after it has encountered a single, new stimulus. The ... to peer within the living brain and explore short-term ... Galán, a leading author on the report who is ...
Cached Biology News:A New Era of Hope for the World's Most Neglected Diseases 2A New Era of Hope for the World's Most Neglected Diseases 3Bare metal stents deliver gene therapy to heart vessels with less inflammation in animal studies 2Team led by Carnegie Mellon University scientist finds first evidence of a living memory trace 2Team led by Carnegie Mellon University scientist finds first evidence of a living memory trace 3
(Date:10/1/2014)... September 30, 2014 Award winning ... announces four new-hosted collaboration bundles that combine ... high quality conferencing experiences for low, flat rate ... choose from, businesses have optimized solutions to meet ... include audio only minutes (1K, 5K, 10K ...
(Date:10/1/2014)... The U.S. Department of Labor has awarded ... as part of the Trade Adjustment Assistance Community College ... by the Department of Labor and Department of Education. ... E. Perez and Secretary of Education Arne Duncan announced ... to nearly 270 colleges across the country. , ...
(Date:9/30/2014)... in German . ... dots in a semiconductor layer. Quantum dots are small structures ... If a short laser pulse is fired at the photonic ... experiences a change in the electromagnetic field around it. This ... light by the dot. As soon as the refractive index ...
(Date:9/30/2014)... analog of one of nature,s most efficient light-harvesting ... led by Alejandro Briseno of the University of ... developing long-sought polymer architecture to boost power-conversion efficiency ... devices. , Briseno, with colleagues and graduate ... University and Dresden University of Technology, Germany, report ...
Breaking Biology Technology:SoundConnect Launches New Audio, Web and Video Bundles 2U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 2U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 3U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 4Ultrafast remote switching of light emission 2Blades of grass inspire advance in organic solar cells 2Blades of grass inspire advance in organic solar cells 3
... CARLOS, Calif., Sept. 16 Nektar,Therapeutics, (Nasdaq: NKTR ... scheduled to present at the upcoming UBS 2008 Global ... New York Hotel on,Tuesday, September 23, 2008 at 10:30 ... a Webcast through a link posted,on the Investor Relations, ...
... Claims, WASHINGTON, Sept. 16 The U.S. ... to the State of Kentucky to,help defray costs ... may prove actual innocence. Awarded by the DOJ,s ... of five competitive awards provided to,Arizona, Texas, Virginia, ...
... 16 PharmAthene, Inc.,(Amex: PIP ) a ... threats, announced today that David P. Wright,President and ... the,UBS Global Life Sciences Conference on September 25, ... Grant Hyatt hotel in New York., PharmAthene,s ...
Cached Biology Technology:Department of Justice Provides States With Funding for Testing in Postconviction Cases 2
Mouse monoclonal [6G11] to Cytohesin 1 + 2 ( Abpromise for all tested applications)....
HP 1 alpha Immunogen: Synthetic peptide between amino acids 1-100 of the human HP 1 alpha protein. Storage: -20 C, Avoid Freeze/Thaw Cycles...
... KLH-conjugated, synthetic peptide corresponding ... of mouse p19ARF. The ... acids 62-75. Clone 5-C3-1. ... by immunoblot. Stability ...
Request Info...
Biology Products: