Clay minerals are typically formed over long periods of time by the gradual chemical weathering of rocks, usually silicate-bearing, by low concentrations of carbonic acid and other diluted solvents.
But as population became denser, the natural chemical and biological recycling processes became overloaded, calling for a redefinition of property rights. Garrett Hardin
The inspections started in 1991, right after the Gulf War. One of the conditions for the ceasefire was that Iraq had to do away with all of its weapons of mass destruction - biological, chemical and nuclear weapons and long-range missiles. Hans Blix
Through the continued accumulation of detailed and reliable knowledge about elementary reactions, we will be in a better position to understand, predict and control many time-dependent macroscopic chemical processes which are important in nature or to human society. Yuan T. Lee
Iraq is a long way from the U.S., but what happens there matters a great deal here. For the risks that the leaders of a rogue state will use nuclear, chemical or biological weapons against us or our allies is the greatest security threat we face. Madeleine Albright
Finally, as the digestive canal is a complex system, a series of separate chemical laboratories, I cut the connections between them in order to investigate the course of phenomena in each particular laboratory; thus I resolved the digestive canal into several separate parts. Ivan Pavlov
What surprises me, what amazes me, is that it seems the military people were expecting to stumble on large quantities of gas, chemical weapons and biological weapons. Hans Blix
For me, first, it's finding quiet in my life - and I do that through yoga and meditation. It's also been a matter of changing the way I eat, because I think what we eat can inform who we are; food is a chemical and a drug to a certain extent. Mariel Hemingway
I was invited to join the newly established Central Chemical Research Institute of the Hungarian Academy of Sciences in 1954 and was able to establish a small research group in organic chemistry, housed in temporary laboratories of an industrial research institute. George Andrew Olah
The world is watching. The use of chemical weapons is and would be totally unacceptable," said Mr Obama in a speech at the National Defense University in Washington.
That's not all our crops can do. We are also learning how to transform plants into factories. We can now raise plants that will create enzymes that would otherwise be created in chemical factories. Thomas Carper
Although every step must be taken to protect against a chemical or biological attack in America, our nation would survive the use of those weapons as we did when anthrax was mailed to our Capitol and other targets. Adam Schiff
I can't say enough about how I'm against drugs. Be smart, think about it, look at what it does to people, look at how much you have to experience in life and be courageous enough to do everything you want to without that chemical help. Erika Christensen
The physiologist who succeeds in penetrating deeper and deeper into the digestive canal becomes convinced that it consists of a number of chemical laboratories equipped with various mechanical devices. Ivan Pavlov
In teaching, I wanted to offer a general pharmacology course based on chemical principles, biochemical classification and mathematical modelling. In the event I achieved neither of my ambitions. James W. Black
I also became interested in chemistry and gradually accumulated enough test tubes and other glassware to do chemical experiments, using small quantities of chemicals purchased from a pharmacy supply house. Sydney Brenner
In the present state of our knowledge, it would be useless to attempt to speculate on the remote cause of the electrical energy... its relation to chemical affinity is, however, sufficiently evident. May it not be identical with it, and an essential property of matter? Humphry Davy
