Navigation Links
AGU journal highlights -- Sept. 6, 2007
Date:9/10/2007

he convergence zones southward shift. Additional variations in biogenic silica of equal magnitude were also found, suggesting that abrupt climate change could originate from within tropical systems.

Title:
Abrupt climate change in southeast tropical Africa influenced by Indian monsoon variability and ITCZ migration

Authors:
Jessica E. Tierney and James M. Russell: Department of Geological Sciences, Brown University, Providence, Rhode Island, U.S.A.

Source:
Geophysical Research Letters (GRL) paper 10.1029/2007GL029508, 2007, http://dx.doi.org/10.1029/2007GL029508


7. Antarctic ice cores record ancient meteoritic events

Antarctica represents the best site to collect small meteoritic particles because windblown terrestrial dust is scarce and extreme environmental conditions prevent chemical weathering. Although many investigations have searched for micrometeorites deposited within modern times, few have looked for them within ancient ice. As part of a new micrometorite collection project launched at the permanent French-Italian station of Concordia, on the East Antarctic Plateau, Narcisi et al. study the Dome C ice core, a core collected by the European Project for Ice Coring in Antarctica. They find two distinct dust layers which, through comparisons with extraterrestrial debris found in deep-sea sediments and polar caps, they determined to be of meteoritic origin. Closer inspection revealed that these layers represented individual meteoritic events, with the first occurring about 481,000 years ago and the second occurring 434,000 years ago, as indicated by layers in the ice core. The authors note that, similar to ashfall from a known volcanic explosion, such meteoritic events have the potential to serve as time markers in other less detailed stratigraphic records.

Title:
First discovery of meteoritic events in deep Antarctic (EPICA-Dome C
'/>"/>

Contact: Peter Weiss
pweiss@agu.org
202-777-7507
American Geophysical Union
Source:Eurekalert

Page: 1 2 3 4 5 6 7 8 9 10 11

Related biology news :

1. UCLA Study Shows One-Third of Drug Ads in Medical Journals Do Not Contain References Supporting Medical Claims
2. Recent breakthroughs in common adult leukemia highlighted in New England Journal of Medicine
3. Leukemia Drug Breakthrough Study In New England Journal Of Medicine
4. Open Access journals get impressive impact factors
5. Funding and bureaucracy, not access to journals, are chief obstacles to scientific productivity
6. New journal article urges use of animal serum-free media for growing live cells
7. Impressive new Impact Factors for BioMed Centrals open-access journals
8. Public Library of Science to launch new, open access journal on neglected tropical diseases
9. Are journal rankings distorting science?
10. New book highlights worlds borderless conservation areas
11. Learning to love bacteria: Stanford scientist highlights bugs benefits
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/18/2014)... mass is made up of rangelands, which include grasslands ... alarming rate. Woody plants, such as trees and shrubs, ... loss of critical habitat and causing a drastic change ... specifically meat. , Researchers with Arizona State University,s ... this loss in both the United States and Argentina. ...
(Date:8/18/2014)... Denmark, and the University of Wisconsin-Madison, USA, have developed a ... both climate and land use change. This new metric was ... of combined rates of climate and land use for the ... have just been published in Nature Climate Change , ... biodiversity and ecosystem function due to the individual or combined ...
(Date:8/18/2014)... with the pygmy phenotype is probably a selective ... team of researchers, but all African pygmy phenotypes ... a more recent adaptation than previously thought., "I,m ... their very challenging environments," said George H. Perry, ... "Tropical rainforests are difficult for humans to live ...
Breaking Biology News(10 mins):Trees and shrubs invading critical grasslands, diminish cattle production 2Trees and shrubs invading critical grasslands, diminish cattle production 3The double threat of climate and land use change enhances risks to biodiversity 2Pygmy phenotype developed many times, adaptive to rainforest 2
... flowers have shifted away from using insects as pollinators and ... birds. In a study published in New Phytologist ... for the first time that Australian native flowers exclusively pollinated ... discriminated by those birds. Dr Adrian Dyer of Monash ...
... Institutet in Sweden have found an explanation for why ... the brains of people with schizophrenia or bipolar disease ... scientific periodical Molecular Psychiatry , identifies a gene ... discovery contributes to the further understanding of the link ...
... of birds, schools of fish, and groups of any other ... aquatic microorganisms, Andrea Giometto, a researcher EPFL and Eawag, showed ... according to the same mathematical expression, where the only unknown ... His article was published in in PNAS in ...
Cached Biology News:For birds, red means 'go' 2New gene variant may explain psychotic features in bipolar disorder 2One law to rule them all -- sizes within a species appear to follow a universal distribution 2
(Date:8/18/2014)... 18, 2014 /PRNewswire/ - SQI Diagnostics Inc. (TSX-V: SQD), a ... and products for advanced microarray diagnostics, today announced it ... 22 at 2:00 pm ET.  During ... a brief review of SQI,s recent commercialization progress and ... industry veteran recently appointed to the Board of Directors ...
(Date:8/18/2014)... WASHINGTON , Aug. 18, 2014   Sterne, ... law firm in Washington, DC , ... Inter Partes Review (IPR) with the U.S. ... Inc., a subsidiary of BioReference Laboratories, Inc. (Nasdaq: BRLI). ... co-owned, or licensed by Myriad Genetics, Inc. These patents ...
(Date:8/18/2014)... HIV Infection Drug Market and Pipeline Insight is a ... infection and the number of deaths due to AIDS has ... the globe. It has been estimated that the death rate ... with the rates for children being even much lower. A ... has been the improved access to antiretroviral drugs and therapy ...
(Date:8/18/2014)... 2014 According to the ... Application (Municipal Wastewater Treatment and Industrial Wastewater Treatment), ... Tubular), By Configuration (Internal/Submerged and External/Sidestream), and By ... The market for membrane bioreactor systems is projected ... a CAGR of 15.28% between 2014 and 2019. ...
Breaking Biology Technology:SQI Diagnostics Announces Investor Conference Call with Dr. Allan Pronovost 2SQI Diagnostics Announces Investor Conference Call with Dr. Allan Pronovost 3Sterne Kessler Files 11 IPR Petitions On Behalf Of GeneDx, Inc., Subsidiary Of BioReference Laboratories, Inc. 2Sterne Kessler Files 11 IPR Petitions On Behalf Of GeneDx, Inc., Subsidiary Of BioReference Laboratories, Inc. 3Global HIV Infection Drug Market Overview 2Global HIV Infection Drug Market Overview 3Global HIV Infection Drug Market Overview 4Membrane Bioreactor Systems Market Worth $2,927 Million by 2019 2Membrane Bioreactor Systems Market Worth $2,927 Million by 2019 3
... SAN DIEGO, Nov. 4 ADVENTRX Pharmaceuticals,Inc. (Amex: ... President,Operations of ADVENTRX, is scheduled to present at the ... is scheduled to present,on Tuesday, November 11th, 2008 at ... takes place November 10-12, 2008 at the,Palace Hotel in ...
... patients, in only 75 minutes using Cepheid,s ... Dorset County Hospital (DCH) is,working hard to reduce ... enhanced MRSA surveillance. As part of the programme, DCH ... hospitals to identify patients who carry the bacteria on ...
... DURECT Corporation,(Nasdaq: DRRX ) announced today financial results ... were $6.6 million for the three months,ended September 30, ... in,2007. Net loss for the three months ended September ... of $7.9 million for the same period in,2007., ...
Cached Biology Technology:Dorset County Hospital Enhances MRSA Surveillance Programme Through Rapid Patient Screening 2Dorset County Hospital Enhances MRSA Surveillance Programme Through Rapid Patient Screening 3DURECT Corporation Announces Third Quarter 2008 Financial Results 2DURECT Corporation Announces Third Quarter 2008 Financial Results 3DURECT Corporation Announces Third Quarter 2008 Financial Results 4DURECT Corporation Announces Third Quarter 2008 Financial Results 5DURECT Corporation Announces Third Quarter 2008 Financial Results 6DURECT Corporation Announces Third Quarter 2008 Financial Results 7DURECT Corporation Announces Third Quarter 2008 Financial Results 8
... Early Drug Development with Imaging Mass Spectrometry ... compound localization data in early drug development ... spectrometry service maps unlabeled ions ... you can localize drugs and metabolites prior ...
... The AccuSpot automates LC micro-fractionation, ... With the AccuSpot system, LC eluent ... onto target plates, in trace amounts. ... target plates for MALDI-TOF-MS measurements. When ...
... The JNK (c-Jun NH2-terminal kinase) ... three identified MAP kinase pathways in ... response to environmental stress, is associated ... itself, and is implicated in the ...
... knockdown of all human, mouse, and ... Genomewide, predesigned siRNAs for a ... , Ready-to-use, convenient matching solutions for ... Cost-effective RNAi and downstream analysis ...
Biology Products: