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Proceedings of the National Academy of Sciences
hideThe Proceedings of the National Academy of Sciences of the United States of America, usually referred to as PNAS, is the official journal of the United States National Academy of Sciences. PNAS is an important scientific journal that printed its first issue in 1915 and continues to publish highly cited research reports, commentaries, reviews, perspectives, feature articles, profiles, letters to the editor, and actions of the Academy. Coverage in PNAS broadly spans the biological, physical, and social sciences. Although most of the papers published in the journal are in the biomedical sciences, PNAS recruits papers and publishes special features in the physical and social sciences and in mathematics. PNAS (abbreviated Proc Natl Acad Sci USA for referencing and indexing purposes) is published weekly in print, and daily online in PNAS Early Edition CODEN: PNASC8.
For more information about Proceedings of the National Academy of Sciences, read the full article at
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News tagged with proceedings of the national academy of sciences
Poisonous prehistoric 'raptor' discovered in China
Other Sciences / Archaeology & Fossils
7 hours ago |
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(PhysOrg.com) -- A group of University of Kansas researchers working with Chinese colleagues have discovered a venomous, birdlike raptor that thrived some 128 million years ago in China. This is the first ...
Physicists propose quantum entanglement for motion of microscopic objects
8 hours ago |
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Researchers at the California Institute of Technology (Caltech) have proposed a new paradigm that should allow scientists to observe quantum behavior in small mechanical systems.
Why newborn babies can't walk
Medicine & Health / Neuroscience
Dec 18, 2009 |
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(PhysOrg.com) -- The first steps of an infant is a real milestone in the development of all mammals including humans, but little is known about why some animals can walk soon after birth, while others need ...
Chemical energy influences tiny vibrations of red blood cell membranes
5 hours ago |
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(PhysOrg.com) -- Much like a tightly wound drum, red blood cells are in perpetual vibration. Those vibrations help the cells maintain their characteristic flattened oval or disc shape, which is critical to ...
Foot binding and a biological approach to the study of Chinese culture
Other Sciences / Social Sciences
6 hours ago |
3 / 5 (1) |
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(PhysOrg.com) -- Exaptation is a familiar concept to evolutionary biologists. It's the basic idea explaining that a trait can evolve because it starts serving a different function. Think of birds: at first, the most important ...
Bioengineered materials promote the growth of functional vasculature, new study shows
6 hours ago |
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Regenerative medicine therapies often require the growth of functional, stable blood vessels at the site of an injury. Using synthetic polymers called hydrogels, researchers at the Georgia Institute of Technology ...
Depression saps endurance of the brain's reward circuitry
Medicine & Health / Neuroscience
7 hours ago |
4.5 / 5 (2) |
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A new study at the University of Wisconsin-Madison suggests that depressed patients are unable to sustain activity in brain areas related to positive emotion.
Study casts doubt on provocative tuberculosis theory
7 hours ago |
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The tuberculosis bacterium is an insidious germ that can lie dormant for many years, then suddenly emerge and cause potentially fatal disease.
Naturally occurring lipid blocks RSV infection in lungs
7 hours ago |
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Researchers at National Jewish Health have discovered that a naturally occurring lipid in the lung can prevent RSV infection and inhibit spread of the virus after an infection is established. RSV is the major cause of hospitalization ...
Microcephaly genes associated with human brain size
8 hours ago |
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A group of Norwegian and American researchers have shown that common variations in genes associated with microcephaly - a neuro-developmental disorder in which brain size is dramatically reduced - may explain differences ...
IU informaticists show new levels of refinement in predicting human mobility, epidemic spread
Technology / Computer Sciences
Dec 17, 2009 |
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(PhysOrg.com) -- The interplay of human mobility patterns like those between local metropolitan commuters and long-range airline travelers during a global epidemic can be modeled in such detail so as to offer ...
Headwater stream nutrient enrichment disrupts food web
Dec 17, 2009 |
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Human activity is increasing the supply of nutrients, such as nitrogen and phosphorus, to stream systems all over the world. The conventional wisdom -- bolstered by earlier research -- has held that these additional nutrients ...
Heme channel found
Dec 17, 2009 |
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In some ways a cell in your body or an organelle in that cell is like an ancient walled town. Life inside either depends critically on the intelligence of the gatekeepers.
Soil Microorganisms? Role Cited as a Missing Factor in Climate Change Equation
Dec 17, 2009 |
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(PhysOrg.com) -- Those seeking to understand and predict climate change can now use an additional tool to calculate carbon dioxide exchanges on land, according to a scientific journal article co-authored by a University of ...
Researchers revise long-held theory of fruit-fly development
Dec 17, 2009 |
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For decades, science texts have told a simple and straightforward story about a particular protein—a transcription factor—that helps the embryo of the fruit fly, Drosophila melanogaster, pattern tissues in a m ...
