Any piece of program code in a high-level language which, when (if) its execution terminates, returns a value. In most programming languages, expressions consist of constants, variables, operators, functions, and parentheses. The operators and functions may be built-in or user defined.
If oral contrast is required, about 45 to 60 minutes is needed for the contrast to move through your digestive tract. Actual scan times vary from a few seconds to several minutes. If no oral contrast is required, the examination will take about 15 to 30 minutes, including the time for intravenous preparation and interview. In some cases additional scanning is required as scans are tailored to suit individual diagnostic needs.
Methadone is generally only effective for pain relief for between four to six hours. However, it has a half-life. Half-life means the amount of time it takes for one-half of the drug to be eliminated from the body. After the second half-life, one fourth of the drug will remain in the body.ethadone has a half-life of between 24 hours to 90 hours. Unlike OxyContin, oxycodone, Vicodin, hydrocodone and other opioids with a much shorter half-life, methadone will stay in the body for a long time.