Science / Chemistry / Fluorescence: A fluorescent substance absorbs short wavelength radiation and re-emits it as radiation with a longer wavelength in a very short time.

Fluorescence In Situ Hybridization (FISH)

Science / Genetics / Fluorescence In Situ Hybridization (FISH): A physical mapping approach that uses fluorescein tags to detect hybridization of probes with metaphase chromosomes and with the less- condensed somatic interphase chromatin. MORE


Science / Weather / Ultraviolet: Electromagnetic radiation that has a wavelength shorter than visible light and longer than x-rays. Although it accounts for only 4 to 5 percent of the total energy of insolation, it is responsible for MORE


Entertainment / Photography / Phosphorescence: Property held by some materials of absorbing light of one wavelength and emitting it as light of a different wavelength. MORE

Thulium (Tm)

Science / Periodic Table of Elements / Thulium (Tm): Atomic number: 69, Atomic mass: 168.93 g.mol -1, Electronegativity: 1.2, Density: 9.3 g.cm-3 at 20°C, Melting point: 1545 °C, Boiling point: 1947 °C, Vanderwaals radius: unknown, Ionic radius: unkn MORE

Flow Cytometry

Science / Genetics / Flow Cytometry: Analysis of biological material by detection of the light- absorbing or fluorescing properties of cells or subcellular fractions (i.e., chromosomes) passing in a narrow stream through a laser beam. An MORE