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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 ...
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.
In hydroponic growing, the nutrient solution is best at 5.2 to 5.8, making Cannabis well-suited to hydroponics because this pH range is hostile to most bacteria and fungi. [ citation needed ] Tissue culture multiplication has become important in producing medically important clones, [ 19 ] while seed production remains the generally preferred ...
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.
[19] [20] Cannabis x intersita Sojak, a strain identified in 1960, is a cross between C. sativa and C. ruderalis. [3] Attempts to produce a Cannabis strain with a shorter growing season are another application of cultivating C. ruderalis. [8] C. ruderalis when crossed with sativa and indica strains will carry the recessive autoflowering trait ...
One thing he’s found is that after the immediate effects of cannabis wear off, people misjudge how impaired they are. “You're sort of always comparing it to how you felt a little while ago ...
Cannabis material can be leached in high-proof spirits (often grain alcohol) to create a "Green Dragon". Cannabis can also be consumed as a cannabis tea and many other beverages. Although THC is lipophilic and only slightly water soluble (with a solubility of 2.8 mg per liter), [13] enough THC can be dissolved to make a mildly psychoactive tea ...