Cork dust

The recommended procedure for examining samples for cork dust is to use a stain that reacts with lignin, a structural macromolecule in cork. When it is necessary to evaluate color development, the microscope should be operated in brightfield rather than phase-contrast mode. 

Microscopically, stained cork debris appears as red, crystal-like aggregations of cells (Fig. 17.2). Although case lint also stains red using this technique, the latter is fibrous in appearance microscopically (Quinsland, 1978). 

Prepare the stain by mixing 2g of phloroglucinol (synonym phloroglu-can stain) in 100 mL 12 M HCl. This is a near-saturated mixture, and the supernatant must be decanted from any crystals that do not dissolve. This solution should be made fresh before use. 

Collect a portion of wine containing the debris by membrane filtration. 

Wet the filter and sediment with phloroglucinol stain, holding stain in contact with sediment for at least 5 min. 

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Properties Karben Carbon black Cork dust Woodmeal Peat... 

Qxiiiquita y Aire liquido. Expl mixts of liq oxygen or liq air with finely pulverized charcoal, cork dust or other absorbent fuel (Ref 9, pp 32 139)... 

The crown closure machine (crowner or capper are alternative names) is placed close to the filler. It is charged with crown corks and these closures are delivered one by one from a slide. The bottle is raised to the crown cork and pressure is applied to the top of the crown in order to seal the liner to the bottle, then the crimped edges of the closure are pressed tightly over the top of the bottle. In many cases the crowns are jetted with a blast of air to remove foreign matter from inside the closure, especially chips of lacquer and cork dust in the case of closures with cork seals. The crown is made of steel, coated with resin or enamel, and the seal embedded in it is either cork or plastic. In some cases the cork is partly covered by a plastic or aluminium disc. 

Cork dust appears crystallike microscopically and may be confused with... 

Interpretation Case lint (containing lignin) and cork dust appear as red fibrous material. 

Anti-slip paint n. Used for application to decks and other surfaces where the conditions conductive to slipping are present. It prevents slipping by providing a tough, rough surface. The roughness is usually achieved by the addition of sand or cork dust. Also called non-skid paint. 

Cork dust n. Very finely divided cork, which is used in anti-condensation paints. 

A man aged 54 years, who was exposed to cork dust for about 14 years, showed intraalveolar giant cells loaded with coal and cork particles. Some had asteroid bodies in their cytoplasm (Remmele and... 

Sisal Jute Wood flour Shell flour Cotton-seed hulls Cotton linters Cork dust Ground bark Inorganic Polyesters Barium carbonate Magnesium carbonate Magnesium hydroxide... 

Suberosis Cork dust Penicillium frequentans, Aspergillus fumigatus... 

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