In a first step toward engineering a drug-free Cannabis plant for hemp fibre and oil, University of Minnesota researchers have identified genes producing tetrahydrocannabinol (THC), the psychoactive substance in marijuana.

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CANNABIS smokers beware: stress or dieting might trigger "reintoxication", resulting in a positive drug test long after you last used the drug.

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Researchers in Italy and Britain have found that the main active ingredient in marijuana — tetrahydrocannabinol, or THC — and related compounds show promise as antibacterial agents, particularly against microbial strains that are already resistant to several classes of drugs.

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Adolescent rats are more likely than adults to be attracted by cannabis - and seem more susceptible to the drug's effects on memory.

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Endocannabinoids seem to play an important role in regulating inflammation processes. Scientists from the University of Bonn have discovered this in experiments on mice. Their results will be published in the distinguished scientific journal 'Science' on Friday, 8 June.

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