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| There are 121 entries in the glossary. |
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| Airborne Particulate Cleanliness Classes | Statistically allowable number of particles equal to, or larger than 0.5µm in size per cubic foot of air. According to ISO 14644-1, a classification number, N, shall designate airborne particulate cleanliness. |
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| Airflow Visualization | Using chemical smoke or fog to visualize flow patterns in a cleanroom or clean space. |
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| Airlock | A room or space designed to act as a means of segregating areas of different air classification or quality. It may contain a method to remove particulate contamination from clean room garments as personnel pass through, and usually includes HEPA filtered air supply and interlocking doors. Airlocks pressure will "float" between those of the spaces being protected. With all doors closed, the airlock pressure will be somewhere between that of the highest adjoining room and that of the lowest adjoining room as air flows through it from room to room. "Ventilated airlocks" are in neutral ducted air balance (supply CFM = return CFM). |
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| Alarms | Audible or visual signals used to warn of unacceptable conditions at monitored sites. They may be buzzers, horns, speakers, bells, or warning lights. They can be Advisory, Alert, or Action alarms. The first two are for operation and maintenance information, to alert of abnormal situations that do not compromise product SISPQ. The Action alarm is for GMP records, indicating that product SISPQ may have been compromised, but Alert alarms are also usually recorded. |
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| Albumin | Commonly, the white of egg is a simple protein widely distributed throughout the tissues and fluid of plants and animals. Soluble in pure water it is also precipitable from a solution by mineral acids, and coagulable by heat in acid or neutral solution. |
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| Albuminoid | Resembling albumin, a simple protein present in horny and cartilaginous tissues, insoluble in neutral solvents. Keratin, elastin, and collagen are albuminoids. |
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| Alert Point | Used in determining when a parameter is drifting toward extremes of the operating range. |
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| Aliquot | Of, pertaining to, or designating an exact divisor or factor of a quantity, specially of an integer. To divide out a sample to multiple containers for multiple analytical tests. |
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| Alkalinity | An expression of the total amount of basic anions (hydroxyl groups) present in a solution. In water analysis, it also represents the presence of carbonate, bicarbonate, and occasionally borate, silicate, and phosphate salts that react to produce hydroxyl groups. Bicarbonate and carbonate ions are expected to be in most waters. Hydroxide may occur in water that has been softened by the lime soda process or has been in contact with fresh concrete. Alkalinity furnishes a guide in choosing appropriate treatment of either raw water or plant effluents. |
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| Allantoic Fluid | The clear white portion of an egg. In influenza vaccine manufacturing, the virus is propagated in the embryonic chick and sloughed into the allantoic fluid that is harvested to produce the vaccine |
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| Allele | Alternative form of a genetic locus; a single allele for each locus is inherited separately from each parent (e.g., at a locus for eye color the allele might result in blue or brown eyes) |
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| Allergenic Extract | An extract in a solvent of a substance that causes an allergic reaction. They are relative crude drugs by contemporary standards and are manufactured by specialty companies and in some cases, by a practicing allergist. Also, allergenic extracts are generally difficult to filter since they most frequently are extracts of natural substances such as foods, house dust, animal hair, etc. |
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| Alum | Aluminum sulfate, commonly added during municipal water treatment to cause insoluble colloids to coalesce into larger particles that can be removed by settling. |
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| Alzheimer's Disease | A disease that causes memory loss, personality changes, dementia and, ultimately, death. Not all cases are inherited, but genes have been found for familial forms of Alzheimer's disease. |
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| Ambient | The normal environment conditions such as temperature, relative humidity, or room pressure of a particular area under consideration. |
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| Ames Test | A simple bacterial test for carcinogens. |
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| Amine | A substance that may be derived from ammonia by the replacement of one or more of the hydrogen atoms by hydrocarbon radicals. |
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| Amino Acids | Any of a group of twenty hydrocarbon molecules (containing the radical group NH2) linked together in various combinations to form proteins in living things. Synthesized by living cells or obtained as essential components of the diet of human and animals, these twenty amino acids are divided into four (4) groups on the basis of their side-chain properties:
1. Neutral, hydrophobic side chains,
2. Neutral, hydrophilic side chains,
3. Acid, hydrophilic side chains,
4. Basic, hydrophilic side chains.
In addition to the twenty common amino acids there are less common derivatives (e.g. hydroxyproline, found in collagen) formed by the modification of a common amino acid. |
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| Ampholyte | Amphoteric electrolyte. Electrolyte that can either give up or take on a hydrogen ion and can thus behave as either an acid or a base. |
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| Amphoteric | Having two opposite characteristics. |
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Glossary V2.0 |
