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Plasmonic nanoparticles (can be used to kill cancer) are extremely sensitive to light, and even the tiniest amount can cause these particles to heat up.
By Admin (from 07/05/2012 @ 14:03:18, in en - Science and Society, read 298 times)

Scientists are now trying to use plasmonic nanoparticles in cancer therapy whereby light energy is converted into heat in order to kill cancer cells. The advantage of such treatment is that it does not cause side effects that are common to chemotherapy. Mingyong Han at the A*STAR Institute of Materials Research and Engineering and co-workers have now developed gold plasmonic nanocrosses that are particularly suited to eliminating cancer cells in cancer therapy. The team demonstrated the usefulness of these nanocrosses by using them to kill human lung cancer cells.

In general, metallic nanostructures have a particular frequency at which light excites electrons close to their surface. The collective movement of electrons, or resonance, in the metal is what converts the light energy into heat. The wavelength at which the resonance occurs is strongly dependent on the size and shape of the nanostructures.

For biomedical applications, the nanostructures should be effective no matter which direction they are illuminated from. Furthermore, the nanostructures should be efficient in absorbing near- to mid-infrared wavelengths because tissue is transparent to the light of these wavelengths.

Based on these requirements, the researchers decided to make gold nanocrosses (see image). In normal synthesis, however, gold would usually grow into the shape of the nanorods. To fabricate nanocrosses, the researchers added copper ions to the growth solution. The incorporation of small amounts of copper caused a twinning of the gold’s crystal structure, which in turn led to the growth of side arms from the crystal facets. “The unique cross-shaped gold structure enables multi-directional excitation to achieve a strong plasmonic resonance in the near- and mid-infrared region. This greatly lowers the laser power required for photothermal cancer therapy compared to nanorods,” says Han.

The researchers tested the performance of their gold nanocrosses by modifying their surfaces and binding them to human lung cancer cells. When irradiated with near-infrared laser light of relatively modest powers of 4.2 W/cm2 for 30 seconds, all cancer cells were killed. The researchers are now planning to test the effectiveness of the gold nanocrosses on animal models in future experiments.

Other applications of the gold nanocrosses are also possible, including photothermal imaging, in which small amounts of light are converted into local heat, or the sterilization of surfaces. “In our current research, we are studying gold nanocrosses for the photothermal destruction of superbugs on biofilms,” says Han.

Source: Agency for Science, Technology and Research - via ZeitNews.org

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There's lots of anecdotal evidence of THC/cbd actually curing cancer. The beauty of cb1 and cb2 receptors.
03/04/2014 @ 13:35:53
By Craig Daniel Smith
That is a very good point... read my comments and message me or comment on your ideas about my comment. Lets do something about this.Sounds like a stoner fundraiser needs to take place. These studies ...
03/04/2014 @ 12:29:32
By Brandon Smith
I concur, Ginamarie. I was going to say pretty much the same thing.
03/04/2014 @ 12:27:16
By Higino Alexandre
our best focus - in my opinion isn't focusing on paying for the funding for research - but freeing the system up to do the research - we need to get it out of schedule I - get it off the hit list so t...
03/04/2014 @ 12:26:30
By Ginamarie Pezzi
understanding the miraculous mechanics of how cannabinols work truly at the heart of nature's beautiful way
02/04/2014 @ 23:26:12
By Doc O'Zee
Scientists studying the benefits of cannabis are just finding out now what most pot smokers have known about for thousands of years. Of course, this is due to the prohibition of cannabis of the last 7...
02/04/2014 @ 20:48:14
By Higino Alexandre
Marijuana is a miracle plant.
02/04/2014 @ 18:46:17
By Mark Garnett


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