What is the use of Lycopodium powder?
Lycopodium powder is a yellow-tan dust-like powder, consisting of the dry spores of clubmoss plants, or various fern relatives. When it is mixed with air, the spores are highly flammable and are used to create dust explosions as theatrical special effects.
Why is Lycopodium powder sprinkled on water surface?
When added to water, they spread out on the surface in a layer that is one molecule thick (a monolayer), with the hydrophilic portion bound to the water surface, and the hydrophobic portion pointed away from the water. Lycopodium powder is used to distinguish between area covered by oleic acid and without oleic acid.
How do you find the volume of an oil drop?
The volume of the original drop is given by 4/3pir^3 (the volume of a sphere) which is the same as the volume of the oil patch which is given as pir^2h (the volume of a circle) where h is the thickness of the oil patch and hence you can even go further and compute the thickness of the oil patch.
What is the diameter of an oil molecule?
– Lock the tap and read the diameter d of the oil spot from the scale of the graph paper (Fig. 2). – Repeat the experiment to obtain mean values. A rough estimation for the diameter of the molecule is d = 10-9 m.
How can you put your hand in water without it getting wet?
Place a coin on a flat plate. Pour enough water on the plate to cover the coin. Now remove the coin with your bare hands–without getting your hands wet or by pouring the water from the plate.
When a drop of oleic acid is placed on the surface of water?
Oleic acid is a substance with one hydrophobic and one hydrophilic end. When a small amount of oleic acid is placed on the surface of water, it stands on end with the hydrophilic end towards the water and the hydrophobic end away. If you could see them, they would look like fans at a crowded concert.
What is Lycopodium spore method?
Validated modified lycopodium spore method has been developed for simple and rapid quantification of herbal powdered drugs. This method gives the ratio of individual ingredients in the powdered drug so that any adulteration of genuine drug with its adulterant can be found out.
What is the size of Lycopodium spore in Micron?
Lycopodium spores are obtained from club moss, Lycopodium clavatum Linn., belonging to family Lycopodiaceae. The spores are yellow in colour, spheroidol, tetrahedral in shape with reticulate surface. They have uniform average diameter of 25 microns. One milligram contains average 94000 spores.
What are the methods of evaluating drugs?
chemical evaluation includes qualitative chemical tests, quantitative chemical tests, chemical assays and instrumental analysis. The isolation, purification and identification of active constituents are chemical methods of evaluation.
What is the size of Lycopodium spores?
Lycopodium spore is oval-triangular to nearly circular and trilete. Its arms of laesura is straight, the entire inner margin 15–18 µm long, extending to spore margin.
Where does Lycopodium grow?
Lycopodium obscurum – L.
| Common Name | Ground Pine, Rare clubmoss |
|---|---|
| Habitats | Moist woodlands[235]. Rich hardwood forests and successional shrubby areas from sea level to 1600 metres[270]. |
| Range | Northern N. America and E. Asia – China, Japan and Siberia. |
| Edibility Rating | (0 of 5) |
| Other Uses | (0 of 5) |
Are spores flammable?
The waxy spores are extremely hydrophobic, or resistant to water. Because they’re 50% fat with lots of surface area, they can be quite flammable, if only briefly. Spores in open wounds are a very bad idea.
Is Lycopodium powder flammable?
Lycopodium powder is very flammable. Low hazard may cause eye and/or skin irritation, may cause gastrointestinal irritation (nausea, vomits, diarrhea), if ingested may cause respiratory irritation, if inhaled possible asthmatic attack.
What is the Lycopodium powder reacting with when it combusts?
Concept: Lycopodium powder is made up of waxy spores from club moss. It was once used as flash powder in early photography. When the powder is squirted into a flame, much of its surface area is exposed to the oxygen in the air and is readily combustible.
Why do Lycopodium spores only flame when they are sprayed out rather than sitting on a surface?
Lycopodium powder is a fine yellow powder made from the spores of the lycopodium plant which is a small pine that grows low to the ground. However, when the powder is sprayed through the flame, the powder ignites producing a tremendous flame due to the increased surface area.
Where is Lycopodium powder from?
Lycopodium powder is a fine yellow powder derived from the spores of Lycopodium clavatum (stag’s horn club moss, running ground pine). When a lighted match is dropped into a pile of this powder, it does not burn.
Are Lycopodium gymnosperms?
Within the plant kingdom, they occur in primitive groups such as Lycopodium or Equisetum, in gymnosperms and angiosperms. In higher plants (angiosperms), some families contain more alkaloid-containing taxa than others.