Cannabis
hideCannabis sativa L. Cannabis indica Lam. (putative) Cannabis ruderalis Janisch. (putative)
Cannabis (Cán-na-bis) is a genus of flowering plants that includes three putative species, Cannabis sativa L., Cannabis indica Lam., and Cannabis ruderalis Janisch. These three taxa are indigenous to Central Asia, South Asia, and surrounding regions. Cannabis has long been used for fibre (hemp), for medicinal purposes, and as a recreational drug. Industrial hemp products are made from Cannabis plants selected to produce an abundance of fiber and minimal levels of THC (Δ9- tetrahydrocannabinol), a psychoactive molecule that produces the "high" associated with marijuana. The psychoactive product consists of dried flowers and leaves of plants selected to produce high levels of THC. Various extracts including hashish and hash oil are also produced from the plant.
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News tagged with cannabis
New study suggests minimal relationship between cannabis and schizophrenia or psychosis
Medicine & Health / Psychology & Psychiatry
Oct 22, 2009 |
3.7 / 5 (3) |
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Last year the UK government reclassified cannabis from a class C to a class B drug, partly out of concerns that cannabis, especially the more potent varieties, may increase the risk of schizophrenia in young people. But the ...
Highest cannabis users are Australians
Oct 20, 2009 |
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(PhysOrg.com) -- A new Lancet paper co-authored by a UQ researcher states that Australians are the highest cannabis users in the world, only matched by USA and New Zealand.
Four percent of adults worldwide using cannabis: Lancet
Oct 16, 2009 |
2.1 / 5 (24) |
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Nearly four percent of adults around the world use cannabis, even though the drug raises many major health concerns, according to a paper published in The Lancet on Friday.
What proportion of psychotic illness is due to cannabis?
Medicine & Health / Psychology & Psychiatry
Sep 29, 2009 |
2.6 / 5 (11) |
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In this week's PLoS Medicine, a team of researchers from Australia and the US, led by Louisa Degenhardt at the University of New South Wales, Sydney, makes the case for estimating the role that cannabis has worldwide as a r ...
Weeding out marijuana: Researchers close in on engineering recognizable, drug-free Cannabis plant
Sep 15, 2009 |
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In a first step toward engineering a drug-free Cannabis plant for hemp fiber and oil, University of Minnesota researchers have identified genes producing tetrahydrocannabinol (THC), the psychoactive substance in marijuana. ...
Impact of cannabis on bones changes with age, study finds
Aug 13, 2009 |
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Scientists investigating the effects of cannabis on bone health have found that its impact varies dramatically with age.
Pot shot: Scientists find cannabis trigger for forgetfulness
Medicine & Health / Neuroscience
Aug 02, 2009 |
4.9 / 5 (9) |
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Researchers on Sunday said they had pinpointed the biochemical pathway by which cannabis causes memory loss in mice.
The surprising effect of cannabis on morphine dependence
Jul 07, 2009 |
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(PhysOrg.com) -- Injections of THC, the active principle of cannabis, eliminate dependence on opiates (morphine, heroin) in rats deprived of their mothers at birth. This has been shown by a study carried out ...
Cannabis alters human DNA
Jun 16, 2009 |
2.5 / 5 (32) |
41
A new study published by University of Leicester researchers has found "convincing evidence" that cannabis smoke damages DNA in ways that could potentially increase the risk of cancer development in humans.
The herbal remedy: Teens use cannabis for relief, not recreation
Apr 22, 2009 |
4.9 / 5 (15) |
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When legal therapies let them down, some teens turn to cannabis. A new study, published in BioMed Central's open access journal Substance Abuse, Treatment, Prevention and Policy suggests that around a third of teens who sm ...
Hollow mask illusion fails to fool schizophrenia patients
Medicine & Health / Neuroscience
Apr 06, 2009 |
4.8 / 5 (8) |
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Patients with schizophrenia are able to correctly see through an illusion known as the 'hollow mask' illusion, probably because their brain disconnects 'what the eyes see' from what 'the brain thinks it is seeing', according ...
Study finds cannabis use, dangerous driving behaviors interrelated
Other Sciences / Social Sciences
Mar 11, 2009 |
2.4 / 5 (7) |
10
Thrill-seeking young men are more likely to drive under the influence of cannabis (DUIC) and engage in reckless driving, according to a new Université de Montréal study. As reported in the journal Accident An ...
Cannabis compound can help cells
Feb 19, 2009 |
4.6 / 5 (8) |
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(PhysOrg.com) -- Cannabis has been used recreationally and for medicinal purposes for centuries, yet its 60 plus active components are only partly understood. Now scientists have discovered how a compound ...
Teens who frequently go out with friends more likely to use marijuana
Feb 02, 2009 |
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Marijuana use appears to have decreased among most European and North American adolescents between 2002 and 2006, and those who went out with friends on fewer evenings of the week were less likely to report using the drug, ...
Researchers explore marijuana and mental health
Oct 08, 2008 |
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(PhysOrg.com) -- A team of mental health experts from the University of Western Sydney say young people who have developed a dependence on cannabis are likely to continue using the drug following the diagnosis of a mental ...
