Placard number 2 indicates the presence of compressed gas. Examples include nitrogen, oxygen, or helium. These gases are under pressure and can pose physical hazards if mishandled or leaked.
A combustible gas placard indicates the presence of gases that can ignite and burn in the event of a fire or explosion. It is used to warn individuals of the potential hazards associated with handling or transporting these gases.
If I am remembering my science classes correctly blue or black coloring indicated the presence of starch.
Sudan III test
The presence of glucose indicates nothing other than the trivial fact that glucose is present.
The iodine test can indicate the presence of starch in food samples. When iodine is added to a sample containing starch, it will turn blue-black in the presence of starch. This color change is used as a visual indicator for the presence of starch in the food sample.
A combustible gas placard indicates the presence of gases that can ignite and burn in the event of a fire or explosion. It is used to warn individuals of the potential hazards associated with handling or transporting these gases.
A placard identifying hazard class 6 describes the presence of a poisonous gas. For an image, see the related link, below.
The radioactive placard on a vehicle indicates that the vehicle carries some amount or regulated radioactive material.
The number 4 on the NFPA 704 placard indicates the highest hazard in any of the three categories (health, fire, reactivity).
It is a DOT hazardous materials placard indicating compressed oxygen.
The white stuff on bread that indicates the presence of mold is called mycelium.
The presence of the epiphysis indicates that the human is still growing.
The word placard (noun meaning a sign, a notice, an advertisement) has no direct antonym; the closest would be 'without placard' or 'placard-less'.
If I am remembering my science classes correctly blue or black coloring indicated the presence of starch.
An ammeter is a device that indicates the presence of an electric current by measuring the flow of electric charges through a circuit.
Someone has misspelled my name on this placard. A sandwich sign is a two-faced placard!
In French, "placard" is masculine.