PDA Technical Glossary
PDA Technical Reports are highly valued membership benefits because they offer expert guidance and opinions on important scientific and regulatory topics and are used as essential references by industry and regulatory authorities around the world. These reports include terms which explain the material and enhance the reader’s understanding.
The database presented here includes the glossary terms from all current technical reports. The database is searchable by keyword, topic, or by technical report. Each definition provided includes a link to the source technical report within the PDA Technical Report Portal.
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- TR 26: Sterilizing Filtration of Liquids (3)
- TR 50: Alt. Methods Mycoplasma Testing (1)
- TR 51: Biological Indicators (1)
- TR 15: Validation: TFF in Biopharmaceuticals (1)
- TR 75: Mycoplasma Filter Rating Method (1)
- TR 85: Enhanced Test Methods - Visible Particle Detection/Enumeration Closures/Containers (1)
- TR 77: The Manufacture of Sterile Pharmaceutical Products Using Blow-Fill-Seal Technology (1)
- TR 45: Depth Filtration (1)
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Mandrel
Specialized filling needles on certain BFS machines which also act to form the container. (TR77)
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Materials of Construction
Polymers or other materials that make up the components of the filter. (TR26)
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Media
The part of the filter through which fluid passes that retains particles during filtration. (TR45)
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Medium
In filtration, the porous material which retains particles as a fluid passes through during the process of filtration (TR26)
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Membrane
A thin, microporous medium used to remove particles and microorganisms from a fluid stream under pressure. (TR26)
Analytical technique to collect particles from a liquid sample on a membrane filter followed by manual examination (sizing and counting) with a microscope. (TR85)
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Microfiltration (MF)
Pressure-driven, membrane-based separation process in which particles and dissolved macromolecules (typically 0.1 &mum or larger) are retained. (TR15)
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Mollicutes
A class of bacteria which lack a cell wall. Mollicutes are small, typically about 0.1-0.5 &mum in size, and vary in form (trivial name: mycoplasma) (TR50)
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Most Probable Number (MPN) Method
A statistical method of estimating the number of viable organisms suspended in a liquid. (TR51)
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Mycoplasma Reduction Filter
A sterilizing grade filter that also provides a log reduction value (or a titer reduction value) for a specified test mycoplasma according to the PDA Mycoplasma Consensus Method. (TR75)