Proceedings of the National Academy of Sciences (PNAS)

Intercalated bacterial biofilms are intrinsic internal components of calcium-based kidney stones

Calcium oxalate stones comprise greater than 70% of all kidney stones. In the current conceptual framework, the initial stone ...
Proceedings of the National Academy of Sciences (PNAS)

Table Of Contents Page, PNAS Volume 123, Number 6

The Middle Pleistocene (MP; ca. 774 to 129 ka) marks a critical period of human evolution, characterized by increasing ...
PNAS

Quantum heat engine power can be increased by noise-induced coherence

Open in Viewer (A) Schematic of a photocell consisting of quantum dots sandwiched between p and n doped semiconductors. Open circuit voltage and solar photon energy ℏνh are related by the Carnot ...
PNAS

Rate enhancement of bacterial extracellular electron transport involves bound flavin semiquinones

Abstract Extracellular redox-active compounds, flavins and other quinones, have been hypothesized to play a major role in the delivery of electrons from cellular metabolic systems to extracellular ...
PNAS

Mangroves in the Gulf of California increase fishery yields

Mangroves are disappearing rapidly worldwide despite their well documented biodiversity and the ecosystem services they provide. Failure to link ecological processes and their societal benefits has ...