Extended Nucleation and Superfocusing in Colloidal Semiconductor Nanocrystal Synthesis.

Hot-injection synthesis is renowned for producing semiconductor nanocolloids with superb size dispersions. Burst nucleation and diffusion-controlled size focusing during growth have been invoked to rationalize this characteristic yet experimental evidence supporting the pertinence of these concepts is scant. By monitoring a CdSe synthesis - with X-ray scattering, we find that nucleation is an extended event that coincides with growth during 15-20% of the reaction time.

Elucidation of the distal convoluted tubule transcriptome identifies new candidate genes involved in renal Mg(2+) handling.

The kidney plays a key role in the maintenance of Mg(2+) homeostasis. Specifically, the distal convoluted tubule (DCT) is instrumental in the fine-tuning of renal Mg(2+) handling. In recent years, hereditary Mg(2+) transport disorders have helped to identify important players in DCT Mg(2+) homeostasis.