The Mg/Ca ratios of biogenic calcite is commonly seen as a valuable palaeo-proxy for reconstructing past ocean temperatures. The temperature dependence of Mg/Ca ratios in bivalve calcite has been the subject of contradictory observations. The palaeoceanographic use of a geochemical proxy is dependent on initial, rigorous calibration and validation of relationships between the proxy and the ambi...

We present results from a numerical investigation of the localization of deformation in thin elastomeric spherical shells loaded by differently shaped indenters. Beyond a critical indentation, the deformation of the shell ceases to be axisymmetric and sharp structures of localized curvature form, referred to as “s-cones,” for “shell-cones.” We perform a series of numerical experiments to system...

Resonance Raman spectra and absolute cross sections of InP/ZnSe/ZnS core/shell/shell nanocrystals have been obtained at excitation wavelengths 501.7, 457.9, 410 nm. Eight different structures having nearly the same lowest excitonic absorption wavelength but significantly stoichiometries are compared. The show phonon features attributable to both InP core ZnSe shell. largest differences among se...

Novel bioresorbable core/shell composite fiber structures loaded with proteins were developed and studied. These unique polymeric structures are designed to combine good mechanical properties with a desired controlled protein-release profile, to serve as scaffolds for tissue regeneration applications. Core/shell fiber structures were formed by "coating" poly(L-lactic acid) fibers with protein-c...

Simvastatin is demonstrated to be a potent stimulator for bone formation. However, a high dosage of simvastatin is required to induce bone regeneration in systematic administration, which may result in various side effects. Here we achieved the local administration of simvastatin through fabricating core/shell microspheres. Meanwhile, the addition of platelet derived growth factor (PDGF) encaps...

We have obtained a 17 μm image of the η Carinae nebula with a signal to noise ratio never reached before. Once deconvolved, the spatial resolution is of the order of 0.5′′. The ring and arclike structures seen at 17 μm are very similar to those observed at 12.5 μm; however the intensity maximum is located elsewhere in a dense cold structure seemingly torus-like around the central object. The hi...

This paper describes a facile method for generating Au@Ag core-shell nanocubes with edge lengths controllable in the range of 13.4-50 nm. The synthesis involved the use of single-crystal, spherical Au nanocrystals of 11 nm in size as the seeds in an aqueous system, with ascorbic acid serving as the reductant and cetyltrimethylammonium chloride (CTAC) as the capping agent. The thickness of the A...

Chronic exposure to addictive drugs enhances cAMP response element binding protein (CREB)-regulated gene expression in nucleus accumbens (NAc), and these effects are thought to reduce the positive hedonic effects of passive cocaine administration. Here, we used viral-mediated gene transfer to produce short- and long-term regulation of CREB activity in NAc shell of rats engaging in volitional co...

We present the Al and Fe yields produced by a generation of solar metallicity stars ranging in mass between 11 and 120M⊙ . We discuss the production sites of these γ ray emitters and quantify the relative contributions of the various components. More specifically we provide the separate contribution of the wind, the C convective shell and the explosive Ne/C burning to the total Al yield per eac...

Dual-emitting photonic nano-objects that can sense changes in the environmental pH are designed based on shell-crosslinked micelles assembled from amphiphilic block copolymers and crosslinked with pH-insensitive chromophores. The chromophoric crosslinkers are tetra-functionalized pyrazine molecules that bear a set of terminal aliphatic amine groups and a set of anilino amine groups, which demon...