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Showing releases 226-250 out of 262 releases.
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Public Release: 17-Jun-2009
JAMA
Less invasive CT-scan based colorectal cancer screening method shows good accuracy
Computed tomographic colonography may offer patients at increased risk of colorectal cancer an alternative to colonoscopy that is less-invasive, is better-tolerated and has good diagnostic accuracy, according to a study in the June 17 issue of JAMA.
Contact: Cristiana Laudi
cristiana.laudi@ircc.it
JAMA and Archives Journals
Public Release: 16-Jun-2009
Proceedings of the National Academy of Sciences
Story ideas from the Proceedings of the National Academy of Sciences
The highlights of the PNAS tipsheet for June 15-19 include: Meteorite may hold clues to solar system formation; Exiting the "poverty trap" in China; Of motivation and memory; How to grow a crystal; Connection between alcohol and pancreatitis; Mammalian extinction risk; In the light of evolution, Sackler Colloquium Supplement.
Contact: PNAS News Office
PNASnews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences
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Public Release: 12-Jun-2009
Physical Review Letters
'Colossal' magnetic effect under pressure
Millions of people today carry around pocket-sized music players capable of holding thousands of songs, thanks to the discovery 20 years ago of a phenomenon known as the "giant magnetoresistance effect," which made it possible to pack more data onto smaller and smaller hard drives. Now scientists are on the trail of another phenomenon, called the "colossal magnetoresistance effect" which is up to a thousand times more powerful and could trigger another revolution in computing technology. Understanding, and ultimately controlling, this effect and the intricate coupling between electrical conductivity and magnetism in these materials remains a challenge, however, because of competing interactions in manganites, the materials in which CMR was discovered. In the June 12, 2009, issue of the journal Physical Review Letters, a team of researchers report new progress in using high pressure techniques to unravel the subtleties of this coupling.
Contact: Yang Ding
yangding@aps.anl.gov
630-252-6288
Carnegie Institution
Public Release: 12-Jun-2009
Science
The mineral that launched a sunglasses empire
Scientists have solved a long-standing mystery about the mineral herapathite, which was discovered in 1852 as the first light-polarizing material and later launched the Polaroid empire. Despite its importance, the mineral's crystal structure -- the precise placement of the atoms within the crystal lattice -- has not been determined until now, researchers report in the June 12 issue of Science.
Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science
Public Release: 12-Jun-2009
Science
DNA-like molecule replicates without enzyme help
In a study that hints at how the first DNA or its precursor might have replicated itself while marinating in early Earth's primordial soup, researchers have constructed DNA-like molecules that can adapt their own sequence in order to pair up with complementary strands -- without a need for a complicated set of enzymes. This study appears in the June 12 issue of Science.
Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science
Public Release: 12-Jun-2009
Science
How whirlybird seeds catch air
Plants and flying animals have evolved the same aerodynamic trick for gaining lift while flying, researchers report in the June 12 issue of Science.
Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science
Public Release: 12-Jun-2009
Science
A 'boom and bust' economy based on deforestation
A study of nearly 300 municipalities surrounding the Brazilian Amazon rainforest shows that deforestation -- the conversion of forests to fields for agriculture and cattle-ranching -- is generally prosperous at first, but followed by decline, indicating a pattern of "boom and bust" for local residents, researchers report in the June 12 issue of Science.
Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science
Public Release: 11-Jun-2009
Nature
Surprise: Typhoons trigger slow earthquakes
Scientists have made the surprising finding that typhoons trigger slow earthquakes, at least in eastern Taiwan. Slow earthquakes are non-violent fault slippage events that take hours or days instead of a few brutal seconds to minutes to release their potent energy. The researchers discuss their data in a study published the June 11 issue of Nature.
Contact: Alan Linde
alinde@dtm.ciw.edu
301-728-9012
Carnegie Institution
Public Release: 10-Jun-2009
JAMA
Donor stem cell transplantation associated with survival benefit for patients with leukemia
An analysis of previous studies indicates that allogeneic stem cell transplantation (stem cells from a compatible donor) is associated with significant overall and relapse-free survival benefit among adult patients with intermediate- and poor-risk but not good-risk acute myeloid leukemia in first complete remission, compared with nonallogeneic SCT therapies, according to an article in the June 10 issue of JAMA.
Contact: Bill Schaller
william_schaller@dfci.harvard.edu
617-632-5357
JAMA and Archives Journals
Public Release: 10-Jun-2009
JAMA
Genetically elevated levels of lipoprotein associated with increased risk of heart attack
A genetic analysis of data from three studies suggests that genetically elevated levels of lipoprotein(a) are associated with an increased risk of heart attack, according to a study in the June 10 issue of JAMA.
Contact: Borge G. Nordestgaard
brno@heh.regionh.dk
JAMA and Archives Journals
Public Release: 9-Jun-2009
Journal of Biological Chemistry
Engineered pig stem cells bridge the mouse-human gap
The discovery that adult skin cells can be 'reprogrammed' to behave like stem cells has been a major scientific boon, providing a way to tap the potential of embryonic stem cells without the associated ethical quandaries. Now, researchers have created a line of such reprogrammed stem cells from adult pigs. As pigs are large animals with a physiology very similar to humans, this work provides a valuable model to study the therapeutic potential of this new "induced pluripotent stem cell" technology.
Contact: Nick Zagorski
nzagorski@asbmb.org
301-634-7366
American Society for Biochemistry and Molecular Biology
Public Release: 9-Jun-2009
Proceedings of the National Academy of Sciences
Story ideas from the Proceedings of the National Academy of Sciences
The highlights of PNAS tipsheet for June 8-12 include: Math model for Web-based information networks; Tearing down termites' defenses; Fire mitigation treatments are often misplaced; How snakes slither; Biodegradable fluorescent polymers; Paleoindian settlements beneath the Great Lakes; REM sleep enhances creativity; Genetic mutation that may cause gout.
Contact: PNAS News Office
PNASnews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences
Public Release: 6-Jun-2009
Chinese Science Bulletin
The evolutionary foundation of genomic imprinting in lower vertebrates
A Chinese scientist group working in College of Life Science, Zhejiang University, has shown that, as mammalian Igf2 CpG island, goldfish Igf2 CpG island has a parental differentially methylated region. These results indicate that the evolutionary foundation of genomic imprinting exists in lower vertebrates and genomic imprinting should not be considered as a unique evolutionary event of mammals. The study is reported in volume 54 (Issue 8, April, 2009) of Chinese Science Bulletin.
Contact: C. Luo
luoc@zju.edu.cn
0086-571-882-06476
Science in China Press
Public Release: 6-Jun-2009
Journal of Biological Chemistry
Omega fatty acid balance can alter immunity and gene expression
For the past century, changes in the Western diet have altered the consumption of omega-6 fatty acids (w6, found in meat and vegetable oils) compared with omega-3 fatty acids (w3, found in flax and fish oil). Many studies seem to indicate this shift has brought about an increased risk of inflammation (associated with autoimmunity and allergy), and now using a controlled diet study with human volunteers, researchers may have teased out a biological basis for these reported changes.
Contact: Nick Zagorski
nzagorski@asbmb.org
301-634-7366
American Society for Biochemistry and Molecular Biology
Public Release: 5-Jun-2009
World's observatories watching 'cool' star
The Whole Earth Telescope, a worldwide network of observatories coordinated by the University of Delaware, is synchronizing its lenses to provide round-the-clock coverage of a cooling star. As the star dims in the twilight of its life, scientists hope it will shed light on the workings of our own planet and other mysteries of the galaxy.
Crystal Trust Foundation
Contact: Tracey Bryant
tbryant@udel.edu
302-831-8185
University of Delaware
Public Release: 5-Jun-2009
Science
Fossil fuels altering the global nitrogen cycle
The isotopic composition of nitrogen from nitrate deposited in Greenland over the past 300 years has decreased dramatically over the past 150 years, researchers report in the June 5 issue of Science.
Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science
Public Release: 5-Jun-2009
Science
Birds learn from their neighbors
When a cuckoo comes along, hoping to sneak one of its own eggs into a reed warbler nest, the warblers mount an impassioned defense, mobbing the parasitic birds while making loud, raspy calls and snapping their beaks. New research shows that the warblers learn this behavior by watching their neighbors, but this process is guided by biology -- when the researchers substituted a harmless, dummy parrot for the cuckoo, the warblers didn't learn the drill, researchers report in the June 5 issue of Science.
Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science
Public Release: 5-Jun-2009
Science
Why the Huntington's mutation targets the brain
A new study may help solve the mystery of why the mutation responsible for Huntington's disease wreaks havoc only on neurons in the brain's striatum, despite the fact that it occurs in cells throughout the body, researchers report in the June 5 issue of Science.
Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science
Public Release: 5-Jun-2009
Science
War, trade, and the origins of social behavior
A pair of studies describes how interactions -- both hostile and helpful -- among groups of our hunter-gatherer ancestors could have played a major role in the evolution of modern human social behavior, researchers report in the June 5 issue of Science.
Contact: Science Press Package
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science
Public Release: 3-Jun-2009
Next-generation software system for flood warning and risk analysis to be developed
Researchers from King's College London and Hohai University are together developing a ground-breaking software system, the Novel Early Flood Warning System (NEWS). NEWS will be the first commercially viable multipurpose early flood warning system to take into account both climate change and corresponding hydrological effects. It will be able to perform early and reliable flood event warning for short-term (a few hours) and medium-term (a few days) as well as risk analysis, which is currently unachievable with conventional models and software.
ICUK; Natural Environment Research Council
Contact: Melanie Haberstroh
melanie.haberstroh@kcl.ac.uk
44-020-784-83076
King's College London
Public Release: 3-Jun-2009
Journal of Molecular Cell Biology
World first: Chinese scientists create pig stem cells
Scientists have managed to induce cells from pigs to transform into pluripotent stem cells -- cells that, like embryonic stem cells, are capable of developing into any type of cell in the body. It is the first time that this has been achieved using somatic cells (cells that are not sperm or egg cells) from any animal with hooves (known as ungulates). It is the first research paper to be published online on Wednesday, June 3, in the newly launched Journal of Molecular Cell Biology.
Contact: Emma Mason
wordmason@mac.com
44-077-112-96986
Oxford University Press
Public Release: 2-Jun-2009
Chinese Science Bulletin
Molecular characterization of H1N1 influenza A viruses isolates from human in North America
National Research Center For Wildlife Born Diseases, Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, China-Research, has shown the molecular characterization of subtypes of H1N1 influenza virus which found in human in North American, in order to understand the source and distribution of viral strains. Chinese Science Bulletin plans to arrange a special topic of papers addressing topics on H1N1 virus research from Chinese scientists. The special topic will publish in No. 13, Vol. 54, July 2009.
Contact: Bei Yan
yanbei@scichina.org
86-010-640-36120
Science in China Press
Public Release: 2-Jun-2009
JAMA
Childhood health disparities can have life-long health effects
Research indicates that physical and mental stress in childhood may have life-long adverse health effects and policy initiatives are needed to emphasize the importance of starting health promotion and disease prevention early in life, according to an article in the June 3 issue of JAMA, a theme issue on child and adolescent health.
Contact: Millicent Lawton
millicent_lawton@harvard.edu
617-919-3110
JAMA and Archives Journals
Public Release: 2-Jun-2009
JAMA
Cognitive behavioral intervention helps prevent depression among at-risk teens
Adolescents at an increased risk of depression who participated in a group cognitive behavioral intervention significantly reduced their symptoms and episodes of depression compared to teens who received usual care, although this effect was not seen for adolescents with a parent with current depression, according to a study in the June 3 issue of JAMA, a theme issue on child and adolescent health.
Contact: JAMA/Archives Media Relations Department
mediarelations@jama-archives.org
312-464-5262
JAMA and Archives Journals
Public Release: 2-Jun-2009
Proceedings of the National Academy of Sciences
Story ideas from the Proceedings of the National Academy of Sciences
The highlights of PNAS tipsheet for June 1-5 include: Radiocarbon dating ancient Chinese pottery; Engineering botulinum neurotoxin; A second molecular target for breast cancer treatment; Gender differences in mathematics; Atmospheric pressure regulates global temperature; Ancient hominid jawbone mystery.
Contact: PNAS News Office
PNASnews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences
Showing releases 226-250 out of 262 releases.
Click to go to page: [ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 ]
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