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OCR for page 338
Possible Health Effects of Exposure to Residential Electric and Magnetic Fields Glossary ac— Alternating current, normally considered to vary sinusoidal with constant frequency ampere—(A) Unit of electric current; 1 A = 1 coulomb per second anisotropic— Having different properties in different directions; dependent on angle equation here— Magnetic flux density bifilar— Being composed of two wires bipartite thoracic centra— Primordial ossification points within the thoracic vertebra carcinogen— Chemical or physical agent capable of causing cancer chromodacryorrhea— A stress response consisting of the release from the eye of a porphyrin-based material secreted by a gland behind the eye, also called Ared tears.@ CI— Confidence interval, 95% CI, if not otherwise specified CIRRPC— Committee on Interagency Radiation Research and Policy Coordination coulomb (C)— Unit of electric charge, the charge carried by a single electron is 1.6 H 10-19 C cpm— Counts per minute equation here— Electric flux density, or displacement vector; its units are coulomb per square meter
OCR for page 339
Possible Health Effects of Exposure to Residential Electric and Magnetic Fields dc— Direct current, or current with Asteady @ flow displacement current— Quantity related to the time rate of change of the electric field DMBA 7,12-dimethylbenz[a]anthracene, a known carcinogenic agent DNA— Deoxyribonucleic acid, found primarily in the cell nucleus and forms the molecular basis for heredity and cell function g— Medium permittivity g0— Permittivity of free space equation here— Electric-field strength (V/m) electromagnetic fields— Coupled electric and magnetic fields ELF— Extremely low frequency, usually associated with frequencies of the order of 3 Hz to 3 kHz EMF— Electromagnetic fields foot (ft)— 1 foot = 0.304 meter fos— An early-response gene gauss (G)— The centimeter-gram-second (cgs) unit of magnetic flux density; 1 G = 10-4 tesla (T) (tesla is the SI unit of magnetic flux density); 1 mG = 0.1 FT; the earth = s static magnetic field is about 0.5 G Gy (gray)— Unit of absorbed dose of ionizing radiation equal to 1 joule of energy deposited per kilogram of tissue equation here— Magnetic-field strength (ampere per square meter) harmonics— Signals of nf0, where n is an integer and f0 is the fundamental frequency (e.g., the harmonics of a 60-Hz signal will be 120 Hz, 180 Hz, 240 Hz, and so forth) Hertz (Hz)— The SI unit of frequency, 1 Hz = sec-1 heterogeneous— Composed of components of different kinds HIOMT— Hydroxyindole-O-methyltransferase homogeneous— Composed of components of like kind impedance— The equivalent of electric resistance in an ac circuit element that determines the flow of current in vitro— Meaning A outside the living body, @ as measured in tissue or cell culture in vivo— Meaning A in the living organism, @ as measured in animals isotropic— Having one or more properties that are independent of direction; independent of angle jun— Cellular early-response gene
OCR for page 340
Possible Health Effects of Exposure to Residential Electric and Magnetic Fields kilo (k)— Designating the factor 1,000; as in kHz = 103 sec-1 mega (M)— Prefix meaning mega, designating the factor 106; as in 1 MV = 1,000,000 volts; or as in MHZ = 1,000,000 sec-1 milli (m)— Designating the factor 10-3, as in 1 msec = 10-3 sec; also used as the symbol for meters (m = meter) in application to length; 1 mm = 10-3 m; 1 m = 3.281 ft myc— Cellular early-response gene F— Prefix meaning micro, designating the factor 10-6; as in 1 :m = 0.000001 meter; also, medium permeability, when used as equation here = equation here F0— Permeability of free space n— Prefix meaning nano, designating the factor 10-9; as in 1 nsec = 1 H 10-9 sec NAT— N-acetyltransferase NMU— N-nitroso-N-methylurea OR— Odds ratio ossification— Formation of bone permittivity— The permittivity is a complex number consisting of a dielectric constant and a loss factor (related to the conductivity); it is an electric property of the material piezoelectric— The production of an electric potential by an applied pressure or force PKC— Protein kinase C prokaryote— Cellular organism with no distinct nucleus, such as a bacterium or blue-green algae relative risk (RR)— Quotient of the risk in exposed to risk in unexposed individuals rms— Root mean square; the rms value of x is %x2 SCE— Sister chromatid exchanges semipartite thoracic centra— Primordial ossification points within the thoracic vertebra SI— SystPme International; internationally adopted system of units, such as the meter, kilogram, coulomb, and second F— Volume conductivity soma— The body of an organism, or the body of a nerve cell sternebra— Primordial sternum of the embryo terata— Abnormalities in the developing or newborn fetus tesla (T)— Tesla, an SI unit of magnetic flux density; 1 T = 104 G
OCR for page 341
Possible Health Effects of Exposure to Residential Electric and Magnetic Fields TPA— 12-O-tetradecanoylphorbol 13-acetate, a phorbol ester known as a cancer promoter transients— Short duration signals containing a range of frequencies and appearing at irregular time intervals trenimon— An alkylating agent used for the treatment of ovarian cancer. streaming potential— Potentials that vary with the movement of the ions in the surrounding fluids vector quantities— Quantities that are specified by magnitude and direction at all points in space VLF— Very low frequency, common designation for the frequency range from 3 Hz to 3 kHz volt (V)— A measure of electric potential T— 2Bf, where f = frequency wire code— A surrogate means of assessing electric-and magnetic-field exposure on the basis of well-defined wiring configurations
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