A white fluorescent lamp is prepared with a substrate and a high voltage circuit. The substrate has a fluorescent layer with silicon quantum dots. The lamp generates a white light by exciting the substrate with the circuit through a spark gap. A photoelectronic conversion is improved and a cost is lowered by using a cheap material as silicon.

 
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> Optical semiconductor device and manufacturing method of the same

> Antibodies for identifying and/or isolating at least one cell population which is selected from the group comprising haematopoietic stem cells, neuronal stem cells, neuronal precursor cells, mesenchymal stem cells and mesenchymal precursor cells
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