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About 806 results for "pnas"

When did flowering plants begin to diversify?
Alpha Galileo

When did flowering plants begin to diversify?

An article published in the journal Proceedings of the National Academy of Sciences (PNAS) proves that the very early evolution and diversification of flowering plants or angiosperms on the Earth took place by colonising freshwater aquatic habitats. Alpha Galileo, 32 minutes ago
Deformation of 3-D hierarchical nanolattices PhysOrg.com, 23 hours ago

31 images for pnas

World Industrial Reporter, 2 days ago
CNN Money, 2 days ago
Research & Development, 1 week ago
Health Canal, 2 days ago
Science News Online, 1 week ago
Ocean Conservancy, 2 days ago
Forensic Magazine, 2 weeks ago
Laboratory Equipment, 2 weeks ago
Science News Online, 2 weeks ago
Innovations Report, 1 week ago
Odisha Samaya

Researchers Calculate the Rate at which Water Crystallises into Ice

According to a study,published in the journal PNAS, some researchers have calculated the rate ofcrystallising water into ice in arealistic computer model of water molecules. This is being tested for the first time. The simulations, which were ...
 Odisha Samaya3 weeks ago Speed of ice formation calculated  Asian Age3 weeks ago Scientists calculate speed of ice formation  Financial Express3 weeks ago Study calculates the speed of ice formation  PhysOrg.com1 month ago

Proton transfer on Cr(III) sites [Letters (Online Only)]

In a recent PNAS report, we propose that heterolytic activation of a CH bond in ethylene on a CrO bond in silica-supported Cr(III) sites forms a Crvinyl species; this surface species coordinates and inserts ethylene to propagate polymer growth (Fig.
 PNAS1 month ago
Laboratory Equipment

Natural Selection, Not Just Mutation Drives Cancer

A paper in PNAS argues against the commonly held accumulation of mutations model of oncogenesis in favor of a model that depends on evolutionary pressures acting on populations of cells.Essentially, the paper states that the ecosystem of a healthy ...
 Laboratory Equipment1 month ago PNAS: Evolution not just mutation drives development of cancer  EurekAlert!1 month ago
PhysOrg.com

Study reveals human body has gone through four stages of evolution

SH-selected postcranial traits. Credit: PNAS , doi/10.1073/pnas.1514828112 Research into 430,000-year-old fossils collected in northern Spain found that the evolution of the human body's size and shape has gone through four main stages, according ...
 PhysOrg.com2 days ago
PhysOrg.com

Solid-state molecular switches using redox active molecules in a porous crystal

An idealized representation of the structure of NU-1000 based on single-crystal X-ray diffraction. Credit: (c) 2015 PNAS doi: 10.1073/pnas.1514485112 (Phys.org)—A group of researchers have provided a proof-of-concept procedure for making a ...
 PhysOrg.com1 week ago
Health Canal

Bioengineers Identify the Key Genes and Functions for Sustaining Microbial Life

Laurence Yang PNAS paleome paper. Caption: Laurence Yang, a postdoctoral researcher in Palsson's Systems Biology Research Group at UC San Diego and a co-first author of the paper. A new study led by bioengineers at the University of California, San ...
 Health Canal3 weeks ago
PhysOrg.com

End-Permian mass extinction may have been driven by an ocean teeming with life

Stratigraphy and geography. Credit: PNAS 2015 ; published ahead of print August 3, 2015, doi:10.1073/pnas.1503755112 (Phys.org)—The Permian geologic period that ended the Paleozoic era climaxed around 252 million years ago with a sweeping global ...
 PhysOrg.com3 weeks ago
Bioscience Technology Online

Gene therapy may improve survival of patients with recurrent ovarian cancer [Global Data Point]

In their report receiving online publication in PNAS Early Edition, a Massachusetts General Hospital (MGH) research team describes how a single injection of a modified version of Mullerian Inhibiting Substance, a protein critical to sexual ...
 Pharmacy Choice1 month ago Recurrent Ovarian Cancer Patients May Have Hope  Bioscience Technology Online1 month ago
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Science World Report

Music And Learning: Music Programs In School Accelerate Brain Development

New findings published in the Proceedings of the National Academy of Sciences (PNAS) revealed that learning music in high school can help with
 Science World Report1 month ago Enjoying learning music  Examiner.com1 month ago
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