Pellicle

Pellicle is a thin layer, film, or membrane that forms on or covers the surface of certain objects or substances. In the context of biology, it refers to a layer that forms on the surface of cells, particularly bacteria and protozoa. In dentistry, it refers to a film that forms on the surface of teeth. In photography, it refers to a thin layer of gelatin that holds the light-sensitive chemicals on a piece of film.

Biology

In biology, a pellicle is a thin layer supporting the cell membrane in various protozoa. The term is also used to refer to the thin, tough layer or coating of insoluble polymers that certain bacteria secrete on their cell surfaces. It can protect the bacteria from antibiotics and other potentially harmful substances.

Dentistry

In dentistry, a pellicle is a protein film that forms on the surface enamel by selective binding of glycoproteins from saliva that prevents continuous deposition of salivary calcium phosphate. It is a precursor to dental plaque.

Photography

In photography, a pellicle is a thin, transparent film that is applied to the surface of a mirror or lens to reduce reflection. This is commonly used in single-lens reflex cameras.

See also

• Biofilm
• Cell membrane
• Dental plaque
• Protozoa