This can trigger a series of chemical changes in the body that lead to cancer.
The material responds to the pattern of spots, undergoing chemical changes at the bright ones.
So an increasing focus of research has been to find drugs which can remove these chemical changes.
Some in the field have been frustrated by the classification system, which focuses on behavioral symptoms and not on chemical changes or brain abnormalities.
It is very closely linked to the biological and chemical changes of puberty and involves the areas of the brain that respond to rewards.
The theory is that the protein in sperm which triggers chemical changes in the egg, leading to embryo development, is defective or missing from the sperm of some infertile men.
Instead the team found an alkaline pH in the cells, suggesting that the brain had compensated over time by adapting its functions to redress the chemical changes brought about by the lack of oxygen.
Dr Mrazek told BBC News Online that it was possible that the stress associated with parental problems caused chemical changes in the body that had an effect on the function of genes thought to be linked to the development of asthma.
Beyond that, there's every evidence that an inappropriate use of technology has created chemical changes in the environment which will need to be addressed and I don't see the will to address it in the major wealthy countries of the world who have created the problem.
One finding is that the act of paying attention creates chemical and physical changes and is continually reshaping brain patterns.
The new department would concentrate on safeguarding borders, working with first-responders such as local police and fire departments, analyzing threats and promoting technological changes to counter chemical, biological and nuclear threats.
Weightlessness not only sees animals use their muscles less, but causes changes in the chemical reactions within the muscle cells, explained Nathaniel Szewczyk from the University of Nottingham, who is the lead author on the new study in the journal of the Royal Society Interface.
Weather is caused by disturbances within the atmosphere, but climate is controlled by external influences, such as the distribution of oceans and continents, the extent of ice and snow-cover, variations in the amount of energy from the sun, and changes in the chemical composition of the atmosphere.
Imperial researchers have discovered what lies behind those high dopamine levels: changes in another brain chemical, called glutamate.
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If that marker is present it changes the course of a chemical reaction.
For example, as part of the process, scientists grow the marine organisms under varying temperatures, and link changes in their shells' chemical signature to different water temperatures.
One photon in a million comes away with a different frequency from the one that it arrived with because it changes the structure of a chemical bond in one of the plastic's molecules.
It also changed the chemical signals coming from the digestive system - which led to changes in the way fat was processed elsewhere in the body.
Miller, the chemical company's network manager, had the opposite experience during the past year when two job changes took him progressively further away from an enterprise directory.
Under the proposed changes, plants would be able to release up to 5, 000 pounds of one chemical and no longer report details of the release--just the name of the chemical on the short form.
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