Glossary Terms (Simple List)
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Resistance Temperature Drive
Sensors that exploit the predictable change in electrical resistance of some materials with changing temperature. (TR3)
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Resistometer
Test device designed to create defined combinations of the physical and/or chemical variables of a sterilization process. Resistometers were formally called biological indicator evaluator resistometer (BIER) vessels. The resistometer is used primarily in the laboratory to determine D and z-values. [Synonym: BIER Vessel] (TR30) (TR51)
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Restricted Access Barrier System (RABS)
RABS are aseptic processing systems (ISO 5) intended to substantially reduce human borne contamination within the aseptic environment where sterile product, containers, closures and equipment are exposed by the use of separative devices and defined mechanical features and operating procedures. (TR22) (TR62)
Aseptic processing systems (ISO 5) intended to substantially reduce human-borne contamination within the aseptic environment where sterile product, containers, closures, and equipment are exposed by the use of separative devices and defined mechanical features and operating procedures. (TR13)
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Retailer
A “retailer” buys goods or products in large quantities from manufacturers or importers, either directly or through a wholesaler, and then sells smaller quantities to the end-user. Examples of retailers that sell pharmaceutical products are pharmacies and hospitals. (TR58)
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Retain (Retention) Samples
Intermediate and final and finished product samples that are stored for the intent of repeating any in-process or release analysis. Typically this is twice the amount of material that is required to perform these. (TR56)
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Retentate
The concentrated feed solution after removal of filtered liquid through the membrane and into the filtrate. [Synonym: concentrate] (TR15)
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Retentate Pressure
The pressure measured at the outlet (retentate) side of the tangential flow filter device containing unfiltered material. (TR15)
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Retention Efficiency
The percentage of particles of a specific size that are removed by a filter. (TR45)
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Retention Factor
One minus the ratio of filtrate concentration of component i (Ci,f) to the bulk or feed concentration of component i (Ci,b) as in the following equation:R = 1 - [Ci,f/Ci,b]Where R=0 for a freely passing solute R=1 for a solute that is fully retained by the membrane[Synonym: rejection coefficient, rejection factor] (TR15)
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Retention Rating
The means by which a filter manufacturer defines the ability of a filter to retain specific-sized particles. (TR45)