Pellicle


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pellicle

[′pel·ə·kəl]
(cell and molecular biology)
A plasma membrane.
(invertebrate zoology)
A thin protective membrane, as on certain protozoans.

Pellicle

 

a condensed layer of cytoplasm on the body surface of many protozoans, such as flagellates and infusorians. It is sometimes thin and elastic and does not inhibit change in body shape. In other cases, it is solid and defines a constant body shape. The exterior of the pellicle is often sculptured, with denticles, papillae, ridges, or other formations. Study of the pellicle’s ultrastructure in the electron microscope shows that the pellicle is usually composed of two separated layers. Each layer, in turn, consists of two membranes, with a less dense, narrow fissure between them.

References in periodicals archive ?
They evaluated the effects of a chitosan on bacterial adhesion and growth on chitosan-treated pellicles.
Many of the same sugars incorporated into the pellicle are related to blood type.
It is our firm belief that residual pellicle fragments remaining in culture are the most likely source of method variability," he concluded.
However, such optical measurements of R and T through a pellicle produce a myriad of interference fringes that complicate the analysis.
We are especially pleased that Osram Opto Semiconductors has implemented Mask Pellicle Technology(TM), part of our SupraYield(TM) technology package.
The Company also announced it will begin ramping-down internal pellicle production at its Danbury, Connecticut facility immediately, ending production by September 2003.
The Nikon 5i system is also capable of measuring photomask patterns through a pellicle with significantly better accuracy than is available on any other metrology system.
SupraYield is a package of four technologies: Mask Pellicle Technology (MPT(TM)), ThermAlign(TM) Chuck, advanced photoresists and Large Clearfield Mask Movement.
The system is also capable of measuring photomask patterns through a pellicle with better accuracy than is available on any other metrology system.
A KLA 331-2 with STARlight -- the most advanced photomask inspection system available and which has the capability to inspect sub-micron level photomasks through a pellicle will be delivered in April.
Kirlin added, "In Asia, a major customer required us to re-certify one of our production facilities in response to a problem that resulted from a manufacturing step that attaches the pellicle to the photomask.
A 3 percent solution applied for a 3 to 4-minute period does not actually bleach the teeth, but helps remove stains, loosening the pellicle, or film, so that normal brushing will cleanse the teeth, giving the teeth a lighter, brighter appearance," said Dr.