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The test was initially developed in the 1930s by the French medical biochemist Pierre Duquénois (1904–1986) and was adopted in the 1950s by the United Nations as the preferred test for cannabis. The test was originally claimed to be specific to cannabis. After several modifications, it became known as the Duquenois–Levine test.
Just like blood testing, saliva testing detects the presence of parent drugs and not their inactive metabolites. This results in a shorter window of detection for cannabis by saliva testing. [23] Delta 9 THC is the parent compound. If a saliva sample is tested in a lab, the detection level can be as low as 0.5 ng/mL (up to 72 hours after intake ...
Climacteric fruit can be either monocots or dicots and the ripening of these fruits can still be achieved even if the fruit has been harvested at the end of their growth period (prior to ripening on the parent plant). [2] Non-climacteric fruits ripen without ethylene and respiration bursts, the ripening process is slower, and for the most part ...
A growing number of states support the legalization of marijuana. Currently, recreational cannabis use is legal in 24 states , while medical use is legal in 38 states.
Autoflowering cannabis or day neutral cannabis varieties automatically switch from vegetative growth to the flowering stage based on age, as opposed to the ratio of light to dark hours required with photoperiod dependent/short-day strains. Many autoflowering varieties are ready to harvest in less than 10 weeks from seed.
Johnson said THC levels really started to take off after marijuana became legal for recreational use in Colorado in 2014. Since then, 24 states, two territories and Washington, D.C. have legalized ...
In the UK, so much cannabis is grown in illegal facilities that the UK is an exporter of cannabis. After cannabis as a drug was rescheduled as a Class B drug in 2008 (see below), more people started reporting on their suspicions of illegal operations and in 2009-2010 almost 7000 illegal facilities were found by police in one year. Vietnamese ...
The latest evidence, published on JAMA Network in January, looked at drivers over 65 — one of the fastest-growing age groups of cannabis users — and found more reason for concern. Participants ...