Means small amount of, like oxygen, sulfite, acid., etc.


Related Terms

HOOKER DIAPHRAGM CELL

A device used in industry for the electrolysis of brine (sodium chloride) to make chlorine and caustic soda (sodium hydroxide) or caustic potash (potassium hydroxide); saturated purified brine fed around the anode passes through the diaphragm to the cathode; chlorine is formed at the anode and hydrogen released at the cathode, leaving sodium hydroxide and residual sodium chloride in the cell liquor; the diaphragm prevents the products from mixing.

MAGNETISM

The phenomena associated with magnetic fields and their effects upon magnetic materials, notably iron and steel. The magnetism of the north-seeking end of a freely suspended magnet is called red magnetism; the magnetism of the south-seeking end is called blue magnetism. Magnetism acquired by a piece of magnetic material while it is in a magnetic field is called induced magnetism. Permanent magnetism is retained for long periods without appreciable reduction, unless the magnet is subjected to a demagnetizing force. The magnetism in the intermediate iron of a ship which tends to change as the result of vibration, aging, or cruising in the same direction for a long period but does not alter immediately so as to be properly termed induced magnetism is called sub permanent magnetism. Magnetism which remains after removal of the magne- tizing force may be called residual magnetism. The magnetism of the earth is called terrestrial magnetism or geomagnetism.

COERCIVE FORCE

The opposing magnetic intensity that must be applied to a magnetic substance to remove the residual magnetism.

ELIMINATION

One of the final processes in the harmonic analysis of tides in which preliminary values of the harmonic constants of a number of constituents are cleared of residual effects of each other.

BUNKER C OIL

Residual fuel oil (no. 6 fuel oil) of high viscosity commonly used in marine and stationary steam power plants.

SEA CURRENT

(SC): The residual current when currents caused by tides and local winds are subtracted from local current. It is the main, large-scale flow of ocean waters.

SC

Sea current - the residual current when currents caused by tides and local winds are subtracted from local current. It is the main, large-scale flow of ocean waters.

BACKGROUND SIGNAL

The output of a leak detector caused by residual gas to which the detector element reacts.

BOTTOMS

Residual fractions that remain at the bottom of a fractionating tower following distillation of the lighter components.

COKING

  1. Destructive distillation of coal to make coke
  2. A process for thermally converting the heavy residual bottoms of crude oil entirely to lower-boiling petroleum products and by-product petroleum coke.

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