Laser Flashes Shed Light on a Changing Arctic

Afterglow Observations Shed New Light on the Nature of X-ray Flashes

X-ray flashes (XRFs) and X-ray rich gamma-ray bursts (XRGRBs) share many observational characteristics with long duration (& 2 s) GRBs, but the reason for which the spectral energy distribution of their prompt emission peaks at lower photon energies, Ep, is still a subject of debate. Although many different models have been invoked in order to explain the lower values of Ep, their implications ...

Quantum dots shed light on diagnoses.

Featured article: Kim S, Lim YT, Soltesz EG, De Grand AM, Lee J, Nakayama A, Parker JA, Mihaljevic T, Laurence RG, Dor DM, Cohn LH, Bawendi MG, Frangioni JV. Near-infrared fluorescent type II quantum dots for sentinel lymph node mapping. Nat Biotechnol 2004;22:93–7. Near-infrared (NIR) (700 –2500 nm) in vivo imaging with semiconductor quantum dots (QDs) can offer nonradioactive extraction of me...

Genotype networks shed light on evolutionary constraints.

An evolutionary constraint is a bias or limitation in phenotypic variation that a biological system produces. One can distinguish physicochemical, selective, genetic and developmental causes of such constraints. Here, I discuss these causes in three classes of system that bring forth many phenotypic traits and evolutionary innovations: regulatory circuits, macromolecules and metabolic networks....

Studies shed light on sunscreen efficacy.

Seafood from a changing Arctic

We review current knowledge about climate change impacts on Arctic seafood production. Large-scale changes in the Arctic marine food web can be expected for the next 40-100 years. Possible future trajectories under climate change for Arctic capture fisheries anticipate the movement of aquatic species into new waters and changed the dynamics of existing species. Negative consequences are expecte...