Yttrium
A rare elemental metal. A radioactive form of yttrium is used in radiation therapy and some types of immunotherapy.
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- Yttrium Y 90 ibritumomab tiuxetan
An anticancer therapy that is a combination of the radioisotope yttrium-90 and a monoclonal antibody to produce substances that locate and bind to cancer cells. Also called IDEC-Y2B8 monoclonal antibody.
- Y chromatin
A brilliantly fluorescent body seen under the microscope in cells containing a Y chromosome when the cells are stained with the dye quinacrine. Quinacrine lights up the Y chromosome more than other chromosomes.
- Y (in genetics)
The Y chromosome, the sex chromosome found in normal males, together with an X chromosome.
- Y (in chemistry)
The symbol for the element yttrium, an ultrarare metal named after Ytterby in southern Sweden. Yttrium has been used in certain nuclear medicine scans.
- Zeitgeber
An environmental agent or event that provides the cue for setting or resetting a biological clock. To be synchronized with our environment, we need the input of Zeitgebers. The most important Zeitgeber in nature is light. Social factors, chemical factors and activity can also serve as Zeitgebers. Light is a so-called photic type Zeitgeber, whereas […]