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Plasmonic nanostructures with a negative Poisson ratio are demonstrated, having the unusual mechanical property of auxetics to expand laterally when being stretched. Using nanomembrane technology, auxetics are shrunk by orders of magnitude, giving simultaneous access to optical properties of plasmonic metamaterials, as well as auxetic mechanical properties on the nanoscale.

Conventional tRNAs have highly conserved sequences, four-armed cloverleaf secondary structures, and L-shaped tertiary structures. However, metazoan mitochondrial tRNAs contain several exceptional structures. Almost all tRNAs(Ser) for AGY/N codons lack the D-arm. Furthermore, in some nematodes, no four-armed cloverleaf-type tRNAs are present: two tRNAs(Ser) without the D-arm and 20 tRNAs without...

Taxane re-treatment is complicated by: modest and variable efficacy to same5 or different taxane6 b f i d fi i i f “ i ” a sence o str ct e n t on o res stance uncertainty as to impact of disease-free / taxane-free interval on response rate 1NCCN Clinical Practice Guidelines in Oncology, Breast Cancer V.1.2009 2A d l & H t b i J Cli O l 2008 26 3660 2 n reopou ou or o agy , n nco ; : – 3Tan et ...

Rapid controlled self-assembly makes DNA ideal for building nanostructures. A problem using hybridized intermediates in hierarchic assembly is their thermodynamic lability. We demonstrate a click-fixation technology by which robust hexagonal DNA modules can be made. This principle is applicable to a wide variety of DNA nanoconstructs.