chemical change


  • WordNet 3.6
    • n chemical change (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved
    • ***


In literature:

Another advantage of exposure is, to bring the peat into a state of more active chemical change.
"Peat and its Uses as Fertilizer and Fuel" by Samuel William Johnson
The plant changes the chemicals which the animal cannot use in their crude form, into plant substances which animals can use.
"The Renewal of Life; How and When to Tell the Story to the Young" by Margaret Warner Morley
Various chemical changes are by no means uncommon.
"Intestinal Ills" by Alcinous Burton Jamison
Chemical changes also occur in the wood in drying, especially so at higher temperatures, rendering it less hygroscopic, but more brittle.
"Seasoning of Wood" by Joseph B. Wagner
When leather is subjected to heat, a chemical change takes place, although no change in appearance may be noted at the time.
"Manual of Military Training" by James A. Moss
A very great change is also effected in its chemical composition; it loses nearly all its base.
"Manures and the principles of manuring" by Charles Morton Aikman
Chemical changes in cheese-ripening, 166.
"Outlines of Dairy Bacteriology, 8th edition" by H. L. Russell
Primarily this is a chemical change consequent on a rise of temperature.
"Essays: Scientific, Political, & Speculative, Vol. I" by Herbert Spencer
The human body is a laboratory in which chemical changes are constantly going on.
"Sex=The Unknown Quantity" by Ali Nomad
In the plant, this food undergoes such chemical changes as are necessary to growth.
"The Elements of Agriculture" by George E. Waring

In news:

The voluntary change comes in response to a California law that sets limits on chemicals known to cause cancer or reproductive toxicity.
Chapter six of 'Boom, gloom and the new normal - how Western baby boomers are changing global chemical demand patterns, again' is now available for download.
Their water consumption did not change, but they drank far more alcohol after being injected with the appetite-increasing chemical .
If you just got done filling the sprayer 's tank with chemicals, and it now has difficulty to get the machine to spray the right "gallons per acre," ask yourself, "What changed".
The following changes will be made to D6875 Standard Test Method for Solidification Point of Industrial Organic Chemicals by Thermistor : Add D6809 to referenced documents in Section 2.
A chemical found in many common products, including plastic bottles and canned food linings, is linked in a new study to thyroid hormone changes in pregnant women and baby boys.
We introduce the ICIS Top 40 Power Players for 2012 - the leaders that are changing the face of the global chemical sector through investments, acquisitions, restructuring and innovative ways to do business.
Changing the chemical properties of some mind-altering drugs has allowed pushers to market them under innocent-sounding names such as " bath salts" for years.
The chemical society released the report on Monday at news conference here at which speakers discussed ways that doctoral training needed to change to.
Responsible Distribution has changed chemical logistics for the better .
Exposure to water or chemicals can cause the composition of fireworks to change, making them hazardous materials.
Scientists are surprised by chemical changes at such freezing-cold temperatures.
Doctoral training must change to help meet society's needs and produce new jobs, says the American Chemical Society in a report that calls for broad reforms.
Maintenance Ludeca's Rotalign Ultra Live Monitors Machine Position Changes Chemical Processing.
When we experience a traumatic event our brain goes through a chemical change and the military is studying these changes in the brain with PET scans.

In science:

The interface moves, and the fractions of particles in the different states change till chemical potential of the two states become equal.
Epigenetic Chromatin Silencing: Bistability and Front Propagation
For a potential V (r) with spherical symmetry, the local chemical potential is changed to µ − V (r), with µ the global chemical potential.
Recent developments in Quantum Monte-Carlo simulations with applications for cold gases
After the chemical freeze-out momentum spectra of the different particle species still change.
A Quick Tour of Ultra-Relativistic Heavy-Ion Physics at the LHC
This leads to “chemical freeze-out”: While maintaining some degree of local kinetic equilibrium through quasi-elastic resonance scattering, the final stable hadron yields hardly change any more.
Collective flow and viscosity in relativistic heavy-ion collisions
In the SM, the Universe was hot and dense enough to drive thermonuclear reactions that changed the chemical composition of the matter.