A term describing a specific acidic group (COOH) that contributes cat ion-exchange ability to some resins.


Related Terms

PILE DIKE

A dike consisting of a group of piles braced and lashed together along a riverbank.

PILE CAP

A mass of reinforced concrete cast around the head of a group of piles to ensure that they act as a unit to support the imposed load.

PERFORMANCE EFFORT RATING

A technique in work measurement used to determine the leveling factor to be applied to an operator or a group of operators by short, randomly spaced observations of the performance index.

PECLET NUMBER

Dimensionless group used to determine the chemical reaction similitude for the scale-up from pilot-plant data to commercial-sized units; incorporates heat capacity, density, fluid velocity, and other pertinent physical parameters.

PARTS KIT

A group of parts, not all having the same basic name, used for repair or replacement of the worn broken parts of an item; it may include instruction sheets and material, such as sandpaper, tape, cement, and gaskets.

PART FAMILY

In the group technology concept, a set of related parts that can be produced by the same sequence of machining operations because of similarity in shape and geometry or similarity in production operation processes.

PARALLEL CUT

A group of parallel holes, not all charged with explosive, to create the initial cavity to which the loaded holes break in blasting a development round. Also known as burn cut.

MULTIPLE SERIES

A method of wiring a large group of blasting charges by connecting small groups in series and connecting these series in parallel. Also known as parallel series.

MECHANICAL SEPARATION

A group of industrial operations by means of which particles of solid or drops of liquid are removed from a gas or liquid, or are separated into individual fractions, or both, by gravity separation (settling), centrifugal action, and filtration.

JOB CLASS

A group of jobs involving a similar type of work, difficulty of performance, or range of pay. Also known as job family; job grade; labor grade.

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