PNAS

The ergodicity question when imaging DNA conformation using liquid cell electron microscopy

Assessing the ergodicity of graphene liquid cell electron microscope measurements, we report that loop states of circular DNA interconvert reversibly and that loop numbers follow the Boltzmann ...
PNAS

In This Issue

Meteorites provide important information about the formation of the Solar System and the distribution of solids and volatiles throughout it. However, meteorites that land on Earth display biases ...
PNAS

A Biometric Study of Human Basal Metabolism

A Biometric Study of Human Basal MetabolismNote: 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 ...
PNAS

Impactor relics of CI-like chondrites in Chang’e-6 lunar samples

We found seven olivine-bearing fragments in lunar samples returned by the Chang’e-6 mission from a huge, ancient (pre-Nectarian) basin on the far-side of the Moon. We identified these uncommon clasts ...
PNAS

NONEXPANSIVE NONLINEAR OPERATORS IN A BANACH SPACE

NONEXPANSIVE NONLINEAR OPERATORS IN A BANACH SPACE*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 ...
PNAS

THE KINETICS OF FORMATION OF NATIVE RIBONUCLEASE DURING OXIDATION OF THE REDUCED POLYPEPTIDE CHAIN

In an increasingly interconnected world, rising political polarization threatens social cohesion and democratic stability. Here, we demonstrate that the two trends might be fundamentally connected: ...
PNAS

FIXED-POINT THEOREMS FOR NONCOMPACT MAPPINGS IN HILBERT SPACE

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 ...
PNAS

Do color similarity judgments vary with age, and do they reveal anything about qualia?

In a new study that provides useful data for understanding the development of color appearance, Moriguchi et al. (1) applied multidimensional scaling (MDS) to color similarity judgments from a large ...
PNAS

The moving mantle beneath Hawaii: A new look at an old bend

R.D.M. wrote the paper. J. Zhang, J. Hu, Dynamics of longitudinal Hawaiian hotspot motion and the formation of the Hawaiian-Emperor Bend. Proc. Natl. Acad. Sci. U.S.A ...
PNAS

Thermal Conductivity and Thermo-Electromotive Force of Single Metal Crystals

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 ...
PNAS

The Bearing of the Living Metasequoia on Problems of Tertiary Paleo-Botany

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 ...