yunowu
08-31-2009, 11:15 PM
Now, gold to help detect lung cancer
2009-08-31 19:15:00
http://www.commodityonline.com/news/Now-gold-to-help-detect-lung-cancer-20798-3-1.html
JERUSALEM (Commodity Online): Now, gold is helping detect lung cancer.
During a study, researchers in Israel have found that gold nano particles can be used to make sensors to detect lung cancer.
They invented a new type of breath test for detecting lung cancer in patients using sensors built with gold nanoparticles.
Although the analysis of breath is not a new tool in cancer diagnosis, this is the first technique that could detect cancer without the need to pre-treat the exhaled breath.
Lung cancer accounts for more than a quarter of all cancer-related deaths with an estimated 1.3 million people dying from the condition worldwide each year. Breath testing is an established, non-invasive method that works by linking volatile organic compounds (VOCs) with specific forms of lung cancer. The drawback of this method at present is that it requires collecting samples and analysing them using techniques such as mass spectrometry and infrared spectroscopy.
Hossam Haick at the Israel Institute of Technology and his colleagues have now developed a new device for detecting cancer in breath, which could provide an almost instant diagnosis of a patient’s health. At the heart of the new device is a carbon-based sensor with embedded gold nanoparticles.
When a patient breathes into the device, particulates in the breath accumulate on the carbon layer and the sensor swells pushing the gold nanoparticles further apart, which, in turn, alters the resistance of the film. Each type of particulate has a unique effect on the resistance which can be measured by having a current flow through the sensor. The user gets a figure on the device’s display panel that indicates whether the person is healthy or has cancer, says Haick.
2009-08-31 19:15:00
http://www.commodityonline.com/news/Now-gold-to-help-detect-lung-cancer-20798-3-1.html
JERUSALEM (Commodity Online): Now, gold is helping detect lung cancer.
During a study, researchers in Israel have found that gold nano particles can be used to make sensors to detect lung cancer.
They invented a new type of breath test for detecting lung cancer in patients using sensors built with gold nanoparticles.
Although the analysis of breath is not a new tool in cancer diagnosis, this is the first technique that could detect cancer without the need to pre-treat the exhaled breath.
Lung cancer accounts for more than a quarter of all cancer-related deaths with an estimated 1.3 million people dying from the condition worldwide each year. Breath testing is an established, non-invasive method that works by linking volatile organic compounds (VOCs) with specific forms of lung cancer. The drawback of this method at present is that it requires collecting samples and analysing them using techniques such as mass spectrometry and infrared spectroscopy.
Hossam Haick at the Israel Institute of Technology and his colleagues have now developed a new device for detecting cancer in breath, which could provide an almost instant diagnosis of a patient’s health. At the heart of the new device is a carbon-based sensor with embedded gold nanoparticles.
When a patient breathes into the device, particulates in the breath accumulate on the carbon layer and the sensor swells pushing the gold nanoparticles further apart, which, in turn, alters the resistance of the film. Each type of particulate has a unique effect on the resistance which can be measured by having a current flow through the sensor. The user gets a figure on the device’s display panel that indicates whether the person is healthy or has cancer, says Haick.