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2. Permanent marker - Wikipedia

   en.wikipedia.org/wiki/Permanent_marker

   In addition to being used for labelling microscopy slides, permanent markers can be used to do a negative stain of a bacterial sample. This means the background is stained with the marker, but the bacteria are not. The bacteria can be seen because they are unstained (lighter) while the background is stained (darker). [2]

3. Xylotechnigraphy - Wikipedia

   en.wikipedia.org/wiki/Xylotechnigraphy

   In order to stain wood in various colours, according to any suitable design, leaving, if desired, parts of the wood unstained, so as to obtain an imitation of inlay, I proceed as follows: I first apply a varnish or solution which will fill the pores of the wood, and exclude the staining liquid from such parts of the surface as are to remain ...

4. Stain - Wikipedia

   en.wikipedia.org/wiki/Stain

   The primary method of stain formation is surface stains, where the staining substance is spilled out onto the surface or material and is trapped in the fibers, pores, indentations, or other capillary structures on the surface. [1] The material that is trapped coats the underlying material, and the stain reflects backlight according to its own ...

5. Staining - Wikipedia

   en.wikipedia.org/wiki/Staining

   A Ziehl–Neelsen stain is an acid-fast stain used to stain species of Mycobacterium tuberculosis that do not stain with the standard laboratory staining procedures such as Gram staining. This stain is performed through the use of both red coloured carbol fuchsin that stains the bacteria and a counter stain such as methylene blue.

6. Wood finishing - Wikipedia

   en.wikipedia.org/wiki/Wood_finishing

   Staining should enhance the appearance of wood by reducing colour variation between and within sapwood and heartwood. It also provides a way of giving bland looking woods such as poplar, the appearance of prized furniture woods such as ebony, mahogany or walnut. Wood can be stained using dyes or pigmented finishes. These finishes are available ...

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9. Molecular-weight size marker - Wikipedia

   en.wikipedia.org/wiki/Molecular-weight_size_marker

   While the unstained markers allow for more exact size determinations, they cannot be viewed while the gel is running. As such, the gel must be stained in order to visualize the bands. [19] Recombinant and Natural Markers Besides stained and unstained markers, protein markers can be thought of in terms of recombinant and natural. [18]