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Most slang names for marijuana and hashish date to the jazz era, when it was called gauge, jive, reefer. Weed is a commonly used slang term for drug cannabis. New slang names, like trees, came into use early in the twenty-first century. [2] [3] [4]
The 1980s media public service announcement This Is Your Brain on Drugs is an example of anti-marijuana propaganda. April 20 International day for cannabis pride. Assassin of Youth 1937 American anti-marijuana propaganda film that depicts cannabis use leading to tragedies, and obscene, all-night parties.
A 2022 study in PLOS One, drawing data from almost 90,000 samples from six US states, representing the largest quantitative chemical mapping of commercial dispensary-grade cannabis flower samples to date, found that “commercial labels do not consistently align with the observed chemical diversity.” In other words, many strain names do not ...
A 2000 study by the US NIST [6] examined 12 chemical spot tests and concluded that all the tests examined "may indicate a specific drug or class of drugs is in the sample, but the tests are not always specific for a single drug or [class]". The study also noted that "mace, nutmeg and tea reacted with the modified Duquenois–Levine [test]".
Most cannabis drug tests yield a positive result when the concentration of THC-COOH in urine exceeds 50 ng/mL. [10] Urine testing is an immunoassay based test on the principle of competitive binding. Drugs which may be present in the urine specimen compete against their respective drug conjugate for binding sites on their specific antibody.
A 2014 collaborative US study of 359 adults with moderate-risk drug use found, that a large number of participants, who reported drug use in the last 3 months, had negative hair tests. The tests were done using an immunoassay followed by a confirmatory GC-MS. For marijuana, only about half of self-disclosed users had a positive hair test.
In 2015, the first government standards for testing were proposed in Colorado's legislature, when potency and microbial testing became mandatory in the state. [11] [12] [13] Colorado cannabis testing laboratories, such as AgriScience Labs, are regulated by the Colorado Department of Revenue's Marijuana Enforcement Division and the Colorado Department of Public Health and Environment. [14]
This is an accepted version of this page This is the latest accepted revision, reviewed on 25 January 2025. Device to vaporize substances for inhalation A vaporization heat wand and vaporization chamber bowl used to deliver vapor through a water pipe A vaporizer or vaporiser, colloquially known as a vape, is a device used to vaporize substances for inhalation. Plant substances can be used ...