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iCys User Guide

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Glossary Glossary of Terms<br />

option button The round buttons in a dialog box that indicate a mutually exclusive choice (for<br />

example, a choice between Portrait or Landscape).<br />

P<br />

palette A grayscale palette containing color definitions for a laser scan image. The palette<br />

can be used to adjust the tonal range of the laser scan image.<br />

parameter A channel that has been chosen for analysis in a protocol.<br />

peak A value that is used to describe the most frequent fluorescence intensity of a<br />

population of cells.<br />

“Peak mode” is the channel number that is used to describe the largest number of<br />

cells in a sample.<br />

peripheral<br />

contour<br />

This contour, along with the integral contour, define a toroidal region of pixels<br />

used to calculate the peripheral value or the cytoplasmic fluorescence.<br />

photobleaching The result of light altering fluorescent molecules so that they have decreased<br />

fluorescence or are no longer fluorescent.<br />

photodetector A device that senses light and converts the energy from that light into an electrical<br />

signal.<br />

photodiode A photodetector used for absorption, extinction, and forward scatter signals.<br />

photomultiplier A photodetector used to detect and measure and fluorescence signals.<br />

tube<br />

(PMT)<br />

pixel The smallest logical unit that can be used to build an image on the screen.<br />

PMT See photomultiplier tube<br />

protocol A description of settings saved from a successful run.<br />

probe Any detectable marker that binds to a specific cellular component or molecular<br />

sequence.<br />

properties Properties refer to the characteristics of a window in the <strong>iCys</strong> software<br />

application. The properties dialog box is used to change the information displayed<br />

in a window and how it is displayed.<br />

Q<br />

quadrant A scattergram that has been divided into four rectangular areas to identify<br />

subpopulations for analysis.<br />

R<br />

RAM (Random Access Memory) Computer memory into which the user can both read<br />

and write information.<br />

D-8 <strong>iCys</strong> Research Imaging Cytometer <strong>User</strong> <strong>Guide</strong> Revision B

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