fluorescent dye
Noun: A fluorescent dye is a type of dye that absorbs light at one wavelength (color) and then emits light at a longer, different wavelength. This emitted light is called fluorescence, which often appears very bright and vivid. These dyes are used to make things visible under specific lighting conditions, especially ultraviolet (UV) or black light.
Fluorescent dyes are primarily used as markers or tracers due to their property of glowing. - They are used in scientific research to label and track biological molecules. - They are used in safety materials, like high-visibility clothing, to make objects glow. - They are used in some artistic and decorative applications.
- The scientist used a fluorescent dye to stain the cell structures, making them visible under the microscope.
- The security features on the passport include patterns printed with fluorescent dye that are invisible under normal light.
- The highlighters contain fluorescent dye, which is why the text seems to glow.
- As an analytical indicator: In chemistry, specific fluorescent dyes can act as indicators. For example, fluorescein changes color (e.g., to pink) in response to chemical changes in a solution, signaling the completion of a reaction, such as the titration of chloride ions.
- In fluorescence microscopy: This is a critical technique in biology where fluorescent dyes bind to specific cellular components, allowing scientists to visualize them with high contrast.
- Fluorochrome (n): A synonym often used in biology and microscopy for a substance, like a dye, that exhibits fluorescence.
- Fluorescein (n): A specific and common type of fluorescent dye, often yellow, used in medicine and as a tracer.
- Fluorescence (n): The property of emitting light that a fluorescent dye possesses.
- Fluorescent (adj): Describing something that contains or uses a fluorescent dye, e.g., .
- Luminescent dye: A broader term for dyes that emit light.
- Tracer dye: Emphasizes its use for tracking flow or leaks.
- Fluorophore: A more technical term for a molecule that fluoresces.
- Fluorescent labeling: The process of attaching a fluorescent dye to a molecule or structure for tracking.
- Fluorescent staining: Using a fluorescent dye to color and visualize a sample, especially in biology.
There are no common idioms specifically for "fluorescent dye." Its usage is almost exclusively technical or descriptive.
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a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed)
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