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Proceedings of the National Academy of Sciences

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The 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.

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News tagged with proceedings of the national academy of sciences

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Political views may skew perception of skin tone, new study finds

Other Sciences / Social Sciences

created 17 hours ago | popularity 3.6 / 5 (5) | comments 5

(PhysOrg.com) -- Political affinity could influence how some people view the skin tone of biracial political candidates, according to a new study from the University of Chicago Booth School of Business, New York University ...


Ice Cold: Cooler Than Being Cool

Ice Cold: Cooler Than Being Cool

Biology / Cell & Microbiology

created 17 hours ago | popularity 4.2 / 5 (10) | comments 0

(PhysOrg.com) -- Water expands when it freezes. Anyone who has ever left a can of soda or bottle of water in the freezer too long has witnessed this first hand. So how do plants and animals survive severe ...


Early protein processes crucial to formation and layering of myelin membrane

Medicine & Health / Research

created 21 hours ago | popularity not rated yet | comments 0

New findings from an international team of researchers probing the nerve-insulating myelin sheath were bolstered by the work of Boston College biologists, who used x-rays to uncover how mutations affect the structure of myelin, ...


Researchers Establish Common Seasonal Patterns Among Bacterial Communities in Arctic Rivers

Researchers Establish Common Seasonal Patterns Among Bacterial Communities in Arctic Rivers

Space & Earth / Earth Sciences

created Nov 24, 2009 | popularity 5 / 5 (1) | comments 0

(PhysOrg.com) -- New research on bacterial communities throughout six large Arctic river ecosystems reveals predictable temporal patterns, suggesting that scientists could use these communities as markers ...


Fish food fight: Fish don't eat trees after all, says new study

Fish food fight: Fish don't eat trees after all, says new study

Biology / Ecology

created Nov 24, 2009 | popularity 4.5 / 5 (4) | comments 0

(PhysOrg.com) -- What constitutes fish food is a matter of debate. A high-profile study a few years ago suggested that fish get almost 50 percent of their carbon from trees and leaves, evidence for a very ...


Acute stress leaves epigenetic marks on the hippocampus

Medicine & Health / Psychology & Psychiatry

created Nov 24, 2009 | popularity 4.7 / 5 (3) | comments 0

(PhysOrg.com) -- Scientists are learning that the dynamic regulation of genes -- as much as the genes themselves -- shapes the fate of organisms. Now the discovery of a new epigenetic mechanism regulating genes in the brain ...


Measured -- The time it takes us to find the words we need

Medicine & Health / Psychology & Psychiatry

created Nov 23, 2009 | popularity 4 / 5 (6) | comments 1

(PhysOrg.com) -- The time it takes for our brains to search for and retrieve the word we want to say has been measured for the first time. The discovery is reported in a paper published in the Proceedings of the National Ac ...


Water droplets direct self-assembly process in thin-film materials

Nanotechnology / Nanomaterials

created Nov 23, 2009 | popularity 5 / 5 (4) | comments 2

You can think of it as origami - very high-tech origami. Researchers at the University of Illinois have developed a technique for fabricating three-dimensional, single-crystalline silicon structures from thin films by coupling ...


Climate change could boost incidence of civil war in Africa

Other Sciences / Social Sciences

created Nov 23, 2009 | popularity 2.4 / 5 (16) | comments 9

Climate change could increase the likelihood of civil war in sub-Saharan Africa by over 50 percent within the next two decades, according to a new study led by a team of researchers at University of California, Berkeley, ...


Peptides control crystal growth with 'switches, throttles and brakes'

Peptides control crystal growth with 'switches, throttles and brakes'

Nanotechnology / Bio & Medicine

created Nov 23, 2009 | popularity 5 / 5 (3) | comments 0

(PhysOrg.com) -- By producing some of the highest resolution images of peptides attaching to mineral surfaces, scientists have a deeper understanding how biomolecules manipulate the growth crystals. This research ...


Computational microscope peers into the working ribosome

Computational microscope peers into the working ribosome (w/ Video)

Biology / Cell & Microbiology

created Nov 23, 2009 | popularity 4.9 / 5 (9) | comments 2

Two new studies reveal in unprecedented detail how the ribosome interacts with other molecules to assemble new proteins and guide them toward their destination in biological cells. The studies used molecular ...


Systems biology approach provides insulin resistance insights

Systems biology approach provides insulin resistance insights

Medicine & Health / Research

created Nov 23, 2009 | popularity 5 / 5 (1) | comments 0

Researchers from the University of California, San Diego recently offered the sharpest-yet picture of how core biochemical pathways in skeletal muscle cells and fat cells are altered in people who suffer from ...


Detecting the Undetectable in Prostate Cancer Testing

Nanotechnology / Bio & Medicine

created Nov 18, 2009 | popularity 4 / 5 (1) | comments 1

(PhysOrg.com) -- A team of Northwestern University researchers, using an extremely sensitive nanotechnology-based tool known as the biobarcode system, has detected previously undetectable levels of prostate-specific antigen ...


moa

Extinct moa rewrites New Zealand's history

Other Sciences / Archaeology & Fossils

created Nov 18, 2009 | popularity 4.6 / 5 (5) | comments 1

(PhysOrg.com) -- The evolutionary history of New Zealand's many extinct flightless moa has been re-written in the first comprehensive study of more than 260 sub-fossil specimens to combine all known genetic, ...


Imaging study shows HIV particles assembling around its genome

Medicine & Health / HIV & AIDS

created Nov 17, 2009 | popularity 5 / 5 (1) | comments 0

(PhysOrg.com) -- The genesis of one the planet's most lethal viruses, HIV, has been caught on tape. New imaging experiments show individual HIV genomes -- strands of RNA — docking on the inner membrane of an infected cell ...