Glossary: D
D value
De-centralised air handling
Through a de-centralised air handling approach, the same results can be delivered as with…
De-ionised water (DI water of DIW)
Deionized water is water that has had almost all of its mineral ions removed, however…
Decontamination
A process that eliminates viable bioburden via use of chemical agents. Source: GMP Draft…
Delta (∆) column of particle counts
Particle counters display readings in two columns: differential (depicted by ∆ delta) and cumulative…
Depyrogenation
A process used to destroy or remove pyrogens (e.g. endotoxin). Source: GMP Draft Annex…
Dew point
Dew point (dp) is the temperature that a volume of air reaches when it…
Dewpoint vs humidity
Dewpoint (dp) is the temperature that a volume of air reaches when it becomes…
Differential particle counts
Particle counters display readings in two columns: differential (depicted by ∆ delta) and cumulative…
Disinfection
“The process by which surface bioburden is reduced to a safe level or eliminated.…
Door interlock
Interlocked doors support good cleanroom entry and exit practices by only allowing one door…
DOP Testing
DQ – Design Qualification
Design Qualification (DQ) is the documented verification that the proposed design of the facilities,…