Researchers have spotted a never-before-seen chemical effect in Vincent Van Gogh's Flowers In A Blue Vase that is dulling the work's vibrant yellows.
BBC: Van Gogh's Flowers In A Blue Vase damage seen in X-rays
The knock-out effect of the chemical secreted in the honey-bee bite, known as 2-heptanone, was discovered as Dr Papachristoforou and colleagues observed bees dealing with pests.
Fabrizio Benedetti, professor of neurophysiology at the University of Turin Medical School, Italy, warned that dopamine may not be the only chemical involved with the placebo effect.
But the strength of the greenhouse effect depends on the chemical composition of the atmosphere, because the phenomenon is due to the absorption of infra-red radiation by various gases in the air.
If, as seems likely, the CWC has the effect of vitiating the Australia Group mechanism, CW-relevant exports may be permitted even to dubious customers -- but it will be hard to contend that the effect on curbing proliferation of chemical weapons will be a positive one.
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.
Now America must rise to the challenge of ratifying the Chemical Weapons Convention and doing it before it takes effect on April the 29th, less than three weeks from today.
Fabrizio Sanna and colleagues at the University of Cagliari in Italy injected oxytocin into particular parts of the brains of rats and induced yawning, or blocked the effect by injecting an oxytocin-blocking chemical first.
"When the government announces these chemicals are unsafe on food they're ... announcing, in effect, that the farm groups and chemical companies who have said there is no problem were wrong, " Ken Cook of the Environmental Working Group told CNN.
And it has a physical effect on brain function and transmission by altering chemical pathways, like those involving adenosine.
Dr Zewail's research involves, in effect, taking high-speed snapshots of chemical reactions.
This problem is compounded by the possible presence of multiple chemicals which together have an additive effect that greatly increases the lethal action of any single chemical.
Pfizer has asserted that it has patents covering the chemical path by which Viagra works--so far without having an effect on the profitability of rivals Levitra or Cialis.
Pfizer (nyse: PFE - news - people ) has asserted that it has patents covering the chemical path by which Viagra works--so far without having an effect on the profitability of rivals Levitra or Cialis.
Although a member of the UN observer mission reckons that loyalist forces include at least two combat brigades that have been held in reserve, apart from fixed-wing bombers and chemical weapons, activists report that much of the Sunni rank and file is in effect idle.
Conceding the point, Dow has cut back production of chemicals in North America and is content, in effect, to collect a fee for showing the Arabs how to run a chemical plant.
Finally, the inevitable effect of the CWC will be to reduce still further the level of effort going into defenses against chemical weapons.
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