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B| There are 98 entries in the glossary. |
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| Braze Welding | A welding process using nonferrous filler metal that has a melting point below that of the base metals, but above 427ºC (800ºF). The filler metal is not distributed in the joint by capillary attraction. This type of welding has been also called Bronze welding, a misnomer. |
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| Brazing | A metal joining process wherein coalescence is produced by use of a nonferrous filler metal having a melting point above 427ºC (800ºF), but lower than that of the base metals being joined. The filler metal is distributed between the closely fitted surfaces of the joint by capillary action. |
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| Breakthrough | The first appearance in the effluent of an ion-exchange unit of unadsorbed components similar to those that deplete the activity of the resin bed. Breakthrough indicates that the resin is exhausted and needs to be regenerated. |
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| Breath Control Shields | Typically made of acrylic or plastic materials, shields protect product, equipment, or the work from particulate contamination expelled by people. |
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| Broad Spectrum | Over a wide range. A broad-spectrum disinfectant is effective against a wide range of microorganisms including bacterial spores, mycobacteria, non-lipid and lipid viruses, fungi, and vegetative bacteria. |
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| Broth | The liquid culture medium in which fermentation or cell culture takes place. |
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| BSE (Bovine Serum Albumin) | A blood protein that makes up approximately 55-65% of the proteins in the bovine serum. Used as a size marker on gels and as carrier protein. |
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| BSE (Bovine Spongiform Encephalopathy) | Sometimes called "Mad Cow Disease". A disease of cattle presumably caused by a virus or other unidentified entity that affects the brain and causes the cow to behave erratically. Prevalent in parts of Europe but not in the United States. BSE is a contaminant that is undesirable in bovine sera. It is not known whether the causative agent can be filtered out since the causative agent itself is not known. In humans, it is believed to cause Creutzfeld-Jacob, a disease affecting the nervous system. |
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| Btu (British thermal unit) | The unit used to measure the amount of heat in a substance. One Btu is the heat required to produce a temperature rise of 1°F. in one lb. of water. |
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| Bubble Point Test | A filter leakage test in which the filter is wetted and air pressure is applied and slowly increased until water is expelled from the largest pores and bubbles appear from a submerged tube in a downstream collection vessel. Vigorous bubbling, as opposed to a diffusional airflow or occasional bubbles, is indicative of reaching the bubble point. This visual test can be fairly accurate for low area filters, such as discs. When used to evaluate high area filters, it is subject to limitations in observation, test time, collection conditions, and pressurization rates. The bubble point test is not recommended for integrity testing of filter cartridges. |
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| Buffer | A substance capable of neutralizing both acids and bases in solution, thereby maintaining the original acidity or causticity of the solution. |
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| Buffer Prep | Area Section of most biotech facilities devoted to the preparation of controlled bioburden buffer solutions for use in the chromatographic separation area of those facilities. |
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| Building Occupancy Classification (Calif | Every building, whether existing or to be erected, is classified by the building official according to its use or the character of its occupancy. The occupancy groups are as follows: - 1. Group A - Assembly (Section 303.1.1)
- 2. Group B - Business (Section 304.1)
- 3. Group C - Organized Camp (Section 431A)
- 4. Group E - Educational (Section 305.1)
- 5. Group F - Factory and Industrial (Section 306.1)
- 6. Group H - Hazardous (Section 307.1) (also see: Hazardous Occupancy - Group H)
- 7. Group I - Institutional (Section 308.1)
- 8. Group M - Mercantile (Section 309.1)
- 9. Group R - Residential (Section 310.1)
- 10. Group S - Storage (Section 311.1)
- 11. Group U - Utility (Section 312.1)
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| Bulk Handling | The transferring of flammable or combustible liquids from tanks or drums into smaller containers for distribution. |
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| Bulk Oxygen System | An assembly of equipment, such as storage containers, pressure regulators, safety devices, vaporizers, manifolds, and interconnecting piping that has a storage capacity of more than 12,000 cubic feet (340 m³) of oxygen at normal temperature and pressure, connected in service or ready for service, or more than 25,000 cubic feet (708 m³) of oxygen, including unconnected reserve on hand at the site. |
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| Bulk Pharmaceutical Chemical (BPC) | (also see: BPC (Bulk Pharmaceutical Chemical)) |
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| BVD (Bovine Viral Diarrhea) | Viral contaminant found in bovine sera. Able to be filtered out using 0.1 µm nylon filters.Bovine Of, relating to, or from a cow: such as Bovine Blood: blood from a cow |
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| Byte | An abbreviation for binary term. A storage unit capable of holding eight bits or the space required for a single letter or number, a single character. |
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Glossary V2.0 |
