Synthesis of novel derivatives of murrayafoline A and their inhibitory effect on LPS-stimulated production of pro-inflammatory cytokines in bone marrow-derived dendritic cells

Cu(I)-catalyzed Huisgen–Meldal–Sharpless type dipolar ‘click’ reactions between azido-tetrathiafulvalene derivatives and ethynylferrocene yield the first examples of ferrocenyl-1,2,3-triazolyl-tetrathiafulvalene assemblies (4a, 4b). The electrochemical behavior of 4a and 4b, which integrate two distinctive redox probes, has been investigated, and their binding ability for various transition-metal cations has been studied by cyclic voltammetry. The contribution of the triazolyl ring in the guest binding process is illustrated by the specific electrochemical recognition of Zn2+ by receptor 4b

Single phase Si_1-xGe(x) nanocrystals and the shifting of the E1 direct energy transition

We report preparation and characterization of Si1−xGex alloys with varied composition x of a large range from 0–1. The materials have been obtained by co-sputtering, followed by a heat treatment process at 600, 800, and 1000 °C for 30 min in a nitrogen gas atmosphere. X-ray diffraction data have revealed the formation of single-phase nanoparticles in the face-centered cubic (FCC) structure of Si1−xGex alloys. We found that lattice constant a of the Si1−xGex alloys increased linearly with the composition parameter x. Average diameters of the single-phase nanoparticles were estimated to be between 3–10 nm. Further evidence of FCC single-phase nanoparticles has been obtained by high resolution transmission electron microscopy. From absorption spectra, the gradual shift of the direct phononless transition identified for the E1 point in the Brillouin zone of bulk Ge is observed in single-phase Si1−xGex nanoparticles as a function of the composition parameter x

Out-of-plane exchange bias and magnetic anisotropy in MnPd/Co multilayers

10.1016/j.jmmm.2008.07.007Journal of Magnetism and Magnetic Materials320233334-3340JMMM

Study of nanostructured polymeric composites and hybrid layers used for light-emitting diodes

International audienc

Opportunities and challenges for mangrove restoration in the Mekong Delta: Status, policies and stakeholder outlook

Based on a literature and policy review, spatial analysis, participatory mapping and stakeholder consultations, this paper identifies potential sites for mangrove restoration; looks at policy planning, possibilities for natural regeneration, and stakeholder perceptions; and discusses opportunities and challenges for mangrove restoration in the Mekong Delta, Vietnam