A5014920644- Luminescence Properties of Advanced Materials
- Botany, Ecology, and Taxonomy Studies
- Photorefractive and Nonlinear Optics
- Solid-state spectroscopy and crystallography
- Solid State Laser Technologies
- Optical properties and cooling technologies in crystalline materials
- Plant Diversity and Evolution
- Environmental and Social Impact Assessments
- Botany and Geology in Latin America and Caribbean
- Botanical Research and Applications
- Molecular Junctions and Nanostructures
- Spectroscopy and Quantum Chemical Studies
- Sustainable Agricultural Systems Analysis
- Photochemistry and Electron Transfer Studies
- Agricultural Economics and Policy
- Lanthanide and Transition Metal Complexes
European Commission
2009
Universidad Autónoma Metropolitana
1996-2004
A systematic investigation of optical absorption and luminescence is presented for Er3+ ions in the Bi4Si3O12 crystal. The intrinsic emission this crystal gives rise to a radiative energy transfer among host lattice ions. Measured oscillator strengths seven different transitions from ground state excited manifolds compare favourably with electric dipole calculated Judd–Ofelt formalism. Radiative lifetimes former states were determined spontaneous probabilities. ratio strength turned out be...
La colección de especímenes tipo del Herbario Nacional Ecuador (QCNE) preserva importantes ejemplares testigo procedentes todo el colectados por investigadores ecuatorianos y extranjeros. Los tipos son gran importancia para entender la biodiversidad porque su designación es un requisito descripción nuevas especies. Presentamos una sinopsis catálogo los primarios (holotipos, isotipos, neotipos e isoneotipos) depositados en herbario QCNE. En total, 1890 QCNE están designados como...