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This is an addendum toComplex viscosity of helical and doubly helical polymeric liquids from general rigid bead-rod theory ...

The persistence and size of the Greenland Ice Sheet (GrIS) through the Pleistocene is uncertain. This is important because reconstructing changes in the GrIS determines its contribution to sea level ...

CD47, a “don't eat me” signal for phagocytic cells, is expressed on the surface of all human solid tumor cells. Analysis of patient tumor and matched adjacent normal (nontumor) tissue revealed that ...

Where will climate change hit hardest? These interactive maps offer a telltale glimpse.

Special Features in PNAS are carefully curated collections of articles that delve into important topics relevant to PNAS readers and often embrace interdisciplinary approaches on emerging issues or ...

This is an addendum toComplex viscosity of helical and doubly helical polymeric liquids from general rigid bead-rod theory ...

This is an addendum toComplex viscosity of helical and doubly helical polymeric liquids from general rigid bead-rod theory ...

Note: The article usage is presented with a three- to four-day delay and will update daily once available. Due to ths delay, usage data will not appear immediately following publication. Citation ...

Many bacteria possess enzymes that synthesize and degrade the intracellular second messenger cyclic diguanylate (c-di-GMP). Bacteria use this molecule to relay environmental signals into physiological ...