That portion of the DNA in plant and animal cells consisting of highly repetitious sequences (millions of copies) typically in the range from 5 to 500 bases. Thousands of copies occur tandemly (end-on-end) at each of many sites. It can be isolated from the rest of the DNA by density gradient centrifugation.
Satellite RNA
A small, self-splicing RNA molecule that accompanies several plant viruses, including tobacco ringspot virus.
Saturated Air
When there is a state of mutual equilibrium between the moist air and the liquid or solid phases of water. Saturated air holds as much water vapor as it can for a given temperature and pressure.
The air is saturated when the partial pressure of water vapor in the air at a given temperature equals the vapor pressure of water at the same temperature.
Saturation Index
The relation of calcium carbonate to the pH, alkalinity, and hardness of water to determine its scale-forming tendency.
SAW
Submerged Arc Welding
SB
Smallest Batch Size
SB
Styrene-Butadiene
SBC
Southern Building Code
SBCCI
Southern Building Code Congress International
SBCs
Standard Building Codes
SBEM
Simplified Building Energy Model
SBR
Styrene-Butadiene Rubber
SBS
Styrene-Butadiene-Styrene (block copolymer)
SBV
Split Butterfly Valve
SCADA
Supervisory Control And Data Acquisition
Scaffold
The central core structure of condensed chromosomes. The scaffold is composed of non-histone chromosomal proteins.
Scale
The precipitate that forms on surfaces in contact with water as the result of a physical of chemical change.
Scale
The mineral deposit that can coat the insides of boilers or the surfaces of RO membranes. It consists mainly of calcium carbonate that precipitates out of solution under certain conditions of pH, alkalinity, and hardness.
Scale
The precipitate that forms on surfaces in contact with water as the result of a physical of chemical change.
Scale (metals)
A layer of oxidation products formed on a metal at high temperature.
Scale-up
To take a biopharmaceutical manufacturing process from the laboratory scale to a scale at which it is commercially feasible.
Scale-up
To take a biopharmaceutical manufacturing process from the laboratory scale to a scale at which it is commercially feasible.
Scanning
Method for disclosing leaks in units, whereby the probe inlet of an aerosol photometer or discrete-particle counter (DPC) is moved in overlapping strokes across the defined test area. ISO 14644-3.