Cooperation includes all atoms

Cooperation in an All-RNA Network

The discovery of catalytic RNA molecules (ribozymes) capable of catalyzing a significant number of diverse chemical reactions suggests that an RNA world preceded the DNA-RNA-Protein world we know today. The self-replication of RNA molecules would be the central process of the RNA world.However, a single selfreplicating RNA would not sustain information on its own if it surpassed the “error thre...

An all optical dynamical dark trap for neutral atoms.

We describe the experimental realization of a dynamical optical trap for atoms: the Rotating Off-resonant Dipole Optical (RODiO) Trap. A blue detuned circularly scanned laser beam creates a time averaged ;;box" for the atoms. We characterized this novel confinement technique by varying the trapping geometry and the laser beam parameters. Our observations agree well with a numerical model.

Finite-temperature quasicontinuum: molecular dynamics without all the atoms.

Using a combination of statistical mechanics and finite-element interpolation, we develop a coarse-grained (CG) alternative to molecular dynamics (MD) for crystalline solids at constant temperature. The new approach is significantly more efficient than MD and generalizes earlier work on the quasicontinuum method. The method is validated by recovering equilibrium properties of single crystal Ni ...

Includes bibliographies.

Innate immunity includes defensins

COMMENTARY We would like to comment on the comprehensive review of Karantanos and Gazouli in Annals of Gastroenterology [1] about genetics and innate immunity in inflammatory bowel disease (IBD). The authors appreciate the important role of innate immune sensing and the production of antimicrobial peptides in maintaining the integrity of the mucosal barrier. Pertinent studies on the subject are...