Science finds one meaning in it in the. 18th Century, another in the 19th, a third in the 20th; each. artist finds unique meanings on other levels of abstraction; and. each man and woman finds different meanings at different. hours of the day, depending on the internal and external.
1 Drug Screening.org, a confidential online screening quiz to assess drug use.  NIDA-Modified Alcohol, Smoking, and Substance Involvement Screening Test (NMASSIST), Online and Printed Screening tool, resource guide, quick reference guide and patient postcard.
The THC in marijuana is one of the drugs tested for in a standard five-drug screening panel. The DOT 5 panel drug screen is a screen for five classes of drugs. The test is mandated by the Department of Transportation to be given to employees of commercial driving companies. It has also been called the NIDA 5 and subsequently the SAMHSA 5 panels for the National Institute on Drug Abuse and the Substance Abuse and Mental Health Services Administration, respectively.