
Hong Kong.

It failed to bring Jim Carrey happiness in the award-winning film Eternal Sunshine of the Spotless Mind, but scientists have now developed a way to block and even delete unwanted memories from people's brains.Researchers have found they can use drugs to wipe away single, specific memories while leaving other memories intact. By injecting an amnesia drug at the right time, when a subject was recalling a particular thought, neuro-scientists discovered they could disrupt the way the memory is stored and even make it disappear. The research has, however, sparked concern among parliamentary advisers who insist that new regulations are now needed to control the use of the drugs to prevent them becoming used by healthy people as a "quick fix". But the US scientists behind the research insist that amnesia drugs could be invaluable in treating patients with psychiatric disorders such as post-traumatic stress. In a new study, revealed in the Journal of Psychiatric Research, psychiatrists at McGill University, in Montreal, and Harvard University, in Boston, used an amnesia drug to "dampen" the memories of trauma victims. Prof Karim Nader, of McGill University, said: "When you remember old memories they can become 'unstored' and then have to be 'restored'. "As the memory is getting restored, we gave patients a drug that turns down the emotional part of the memory. It left the conscious part of the memory intact, so they could still remember all the details but without being overwhelmed by the memory." The research suggests memories can be manipulated because they act as if made from glass, existing in a molten state as they are being created, before turning solid. When the memory is recalled, however, it becomes molten again and so can be altered before it once more resets. The drug used by the scientists is thought to disrupt the biochemical pathways that allow the memory to "harden" after it is recalled. The researchers used propranolol, a drug normally used to treat hypertension in heart disease patients but also known to cause memory problems. They treated 19 accident or rape victims for 10 days with the drug or with dummy pills, while they asked to describe their memories of a traumatic event that happened 10 years earlier. A week later, they found that the patients given the drug suffered fewer signs of stress such as raised heart rate when recalling their trauma.
Nurturing high rise crops in the "vertical farm" Energy would come from a giant solar panel but there would also be incinerators which use the farm's waste products for fuel. All of the water in the entire complex would be recycled. Several hours drive north of the city in upstate New York, Ed Miller's 18,000 apple trees are in full bloom. Like farmers across the world he has lived through decades of constant change and innovation. But he remains, at heart, a man of the soil.