Adulteration is defined as the tampering or manipulation of a urine specimen with the intention of altering the test results. The use of adulterants can cause false negative results in drug tests by either interfering with the screening test and/or destroying the drugs present in the urine.
A caryatid from the Erechtheion, standing in contrapposto, displayed at the British Museum. A caryatid (/kÃ¦riËÃ¦tÉªd/; Greek: ÎºÎ±ÏÏÎ¬ÏÎ¹Ï, plural: ÎºÎ±ÏÏÎ¬ÏÎ¹Î´ÎµÏ) is a sculpted female figure serving as an architectural support taking the place of a column or a pillar supporting an entablature on her head. The Greek term karyatides literally means maidens of Karyai, an ancient town of Peloponnese.
(2) (molecular biology) A vehicle (e.g. a plasmid) used to transfer the genetic material such as DNA sequences from the donor organism to the target cell of the recipient organism. (3) (biology) A biotic agent that disperses reproductive structures of another organism, as a bee transmitting pollen to the stigma of a flower. (4) (mathematics) A term describing something with both direction and magnitude.