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- Lycopodium_powder abstract "Lycopodium powder is a yellow-tan dust-like powder historically used as a flash powder. It is composed of the dry spores of clubmoss plants, various fern relatives principally in the genera Lycopodium and Diphasiastrum. When mixed with air, the spores are highly flammable because of their high fat content and their large surface area per unit of volume — a single spore's diameter is about 33 micrometers (μm). Preferred source species are Lycopodium clavatum (wolf's-foot clubmoss) and Diphasiastrum digitatum (common groundcedar) because these widespread and often locally abundant species are both prolific in their spore production and easy to collect.Lycopodium has been used in fireworks and explosives, fingerprint powders, as a covering for pills, and as an ice cream stabilizer. Today, the principal use of the powder is to create flashes or flames that are large and impressive but relatively easy to manage safely in magic acts and for cinema and theatrical special effects. Lycopodium powder is also sometimes used as a lubricating dust on skin-contacting latex (natural rubber) goods, such as condoms and medical gloves.In physics experiments and demonstrations, lycopodium powder is used to make sound waves in air visible for observation and measurement, and to make a pattern of electrostatic charge visible. The powder is also highly hydrophobic; if the surface of a cup of water is coated with lycopodium powder, a finger or other object inserted straight into the cup will come out dusted with the powder but remain perfectly dry.Because of the very small size of its particles, lycopodium powder can be used to demonstrate Brownian motion. A microscope slide, with or without a well, is prepared with a droplet of water, and a fine dusting of lycopodium powder is applied. Then, a cover-glass can be placed over the water and spore sample in order to reduce convection in the water by evaporation. Under several hundred diameters magnification, one will see in the microscope, when well focused upon individual lycopodium particles, that the spore particles \"dance\" randomly. This is in response to asymmetric collisional forces applied to the macroscopic (but still quite small) powder particle by microscopic water molecules in random thermal motion. The lycopodium particles appear to be \"alive\", but they are only inert particles being buffeted by forces which, again, because of the small size of the lycopodium particles, respond to the momentum applied to them, which does not quite average to zero in three dimensions. Thus, the particles move.As a then-common laboratory supply, lycopodium powder was often used by inventors developing experimental prototypes. For example, Nicéphore Niépce used lycopodium powder in the fuel for the first internal combustion engine, the Pyréolophore, about 1807, and Chester Carlson used lycopodium powder in 1938 in his early experiments to demonstrate xerography.".
- Lycopodium_powder wikiPageID "25309794".
- Lycopodium_powder wikiPageLength "4335".
- Lycopodium_powder wikiPageOutDegree "33".
- Lycopodium_powder wikiPageRevisionID "670045406".
- Lycopodium_powder wikiPageWikiLink Brownian_motion.
- Lycopodium_powder wikiPageWikiLink Category:Pyrotechnic_compositions.
- Lycopodium_powder wikiPageWikiLink Chester_Carlson.
- Lycopodium_powder wikiPageWikiLink Condom.
- Lycopodium_powder wikiPageWikiLink Diphasiastrum.
- Lycopodium_powder wikiPageWikiLink Diphasiastrum_digitatum.
- Lycopodium_powder wikiPageWikiLink Electric_charge.
- Lycopodium_powder wikiPageWikiLink Explosive_material.
- Lycopodium_powder wikiPageWikiLink Fat.
- Lycopodium_powder wikiPageWikiLink Fingerprint_powder.
- Lycopodium_powder wikiPageWikiLink Fireworks.
- Lycopodium_powder wikiPageWikiLink Flash_powder.
- Lycopodium_powder wikiPageWikiLink Hydrophobe.
- Lycopodium_powder wikiPageWikiLink Ice_cream.
- Lycopodium_powder wikiPageWikiLink Lubrication.
- Lycopodium_powder wikiPageWikiLink Lycopodiopsida.
- Lycopodium_powder wikiPageWikiLink Lycopodium.
- Lycopodium_powder wikiPageWikiLink Lycopodium_clavatum.
- Lycopodium_powder wikiPageWikiLink Magic_(illusion).
- Lycopodium_powder wikiPageWikiLink Medical_glove.
- Lycopodium_powder wikiPageWikiLink Micrometre.
- Lycopodium_powder wikiPageWikiLink Movie_theater.
- Lycopodium_powder wikiPageWikiLink Natural_rubber.
- Lycopodium_powder wikiPageWikiLink Nicéphore_Niépce.
- Lycopodium_powder wikiPageWikiLink Physics.
- Lycopodium_powder wikiPageWikiLink Pill_(pharmacy).
- Lycopodium_powder wikiPageWikiLink Pteridophyte.
- Lycopodium_powder wikiPageWikiLink Pyréolophore.
- Lycopodium_powder wikiPageWikiLink Sound.
- Lycopodium_powder wikiPageWikiLink Special_effect.
- Lycopodium_powder wikiPageWikiLink Spore.
- Lycopodium_powder wikiPageWikiLink Theatre.
- Lycopodium_powder wikiPageWikiLink Xerography.
- Lycopodium_powder wikiPageWikiLinkText "Lycopodium powder".
- Lycopodium_powder wikiPageWikiLinkText "Lycopodium".
- Lycopodium_powder wikiPageWikiLinkText "flash powder".
- Lycopodium_powder wikiPageWikiLinkText "lycopodium powder".
- Lycopodium_powder wikiPageUsesTemplate Template:Chem-stub.
- Lycopodium_powder wikiPageUsesTemplate Template:Fact.
- Lycopodium_powder wikiPageUsesTemplate Template:Portal.
- Lycopodium_powder wikiPageUsesTemplate Template:Reflist.
- Lycopodium_powder subject Category:Pyrotechnic_compositions.
- Lycopodium_powder hypernym Powder.
- Lycopodium_powder type ChemicalCompound.
- Lycopodium_powder type Composition.
- Lycopodium_powder comment "Lycopodium powder is a yellow-tan dust-like powder historically used as a flash powder. It is composed of the dry spores of clubmoss plants, various fern relatives principally in the genera Lycopodium and Diphasiastrum. When mixed with air, the spores are highly flammable because of their high fat content and their large surface area per unit of volume — a single spore's diameter is about 33 micrometers (μm).".
- Lycopodium_powder label "Lycopodium powder".
- Lycopodium_powder sameAs Q1019218.
- Lycopodium_powder sameAs Bärlappsporen.
- Lycopodium_powder sameAs Lycopodiumpoeder.
- Lycopodium_powder sameAs Lycopodium-pulver.
- Lycopodium_powder sameAs m.09g709f.
- Lycopodium_powder sameAs Ликоподий.
- Lycopodium_powder sameAs Nikt.
- Lycopodium_powder sameAs Лікоподій.
- Lycopodium_powder sameAs Q1019218.
- Lycopodium_powder wasDerivedFrom Lycopodium_powder?oldid=670045406.
- Lycopodium_powder isPrimaryTopicOf Lycopodium_powder.