chemical substance


  • WordNet 3.6
    • n chemical substance material produced by or used in a reaction involving changes in atoms or molecules
    • ***


  • Carl Jung
    “The meeting of two personalities is like the contact of two chemical substances. If there is any reaction, both are transformed.”


In literature:

It overcame the chemical forces by which the substance was held together and reduced them to gas and powder.
"The World Peril of 1910" by George Griffith
The substances which rapidly induce chemical change in peats, are of two kinds, viz.
"Peat and its Uses as Fertilizer and Fuel" by Samuel William Johnson
Chemically speaking, it is exactly the same substance, whether in the form of lump or powder.
"Conversations on Chemistry, V. 1-2" by Jane Marcet
Those that unite chemically with certain by-products of bacterial growth to form inert substances.
"Outlines of Dairy Bacteriology, 8th edition" by H. L. Russell
This state of keeping seems to be wholly owing to the curious chemical change that has taken place in their substance.
"The Cruise of the Betsey" by Hugh Miller
In its primary stage, every germ consists of a substance that is uniform throughout, both in texture and chemical composition.
"Introduction to the Science of Sociology" by Robert E. Park
Doubtless other granulations have a more complicated constitution, and very often are a mixture of various chemical substances.
"Histology of the Blood" by Paul Ehrlich
The chemical forces therefore act in the one direction towards complete consumption of the reacting substance.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1" by Various
When that is done, colchicine may be found to exhibit a definite chemical interaction with this hitherto undiscovered substance.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6" by Various
Life is a mode of existence of protoplasm and consists essentially in the constant renewal of the chemical constituents of this substance.
"Landmarks of Scientific Socialism" by Friedrich Engels

In news:

Hazardous Materials and Toxic Substances Learning Laboratory, 10:30-11:20am Title: The National Conversation on Public Health and Chemical Exposures.
With efforts to revamp the nation's chemical safety law stalled in Congress, the Obama administration's top environmental regulator vowed three years ago to act on her own to beef up the oversight of toxic substances.
A glow coming from the glassy shell of microscopic marine algae called diatoms could someday help detect chemicals and other substances in water samples.
Eighty percent of the products tested contained flame-retardant chemicals, according to research published today in Environmental Science & Technology, meaning that wee ones are still surrounded by substances long ago deemed too dangerous.
Testing requirements for chemical substances revoked EPA is revoking some TSCA Section 4 testing requirements for six chemical substances and all of the testing requirements for four chemical substances.
The European Union ended a 17-year- old tariff on a chemical substance from China used to make lubricating oils and foundry molds, denying protection to Austria's Lenzing AG.
A Rockville, Maryland company has patented " left-handed " sugar, a substance that contains the same chemical components as the common processed sweetener but has a mirror-image molecular arrangement.
Often, property transactions in this area involve parcels which have been impacted environmentally by industrial activity, chemical and hazardous substance usage, or other contamination on or near the potential property site.
Chilworth Now Provides Physico-Chemical Testing of Substances of Very High Concern for European Union Reach Certification.
A 66-year-old Tinton Falls man was charged with multiple offenses after he allegedly burglarized a vehicle and then sprayed its owners with a chemical substance.
If the accused person possessed or assembled even one chemical to be used in manufacturing a controlled substance, that person may be found guilty of violating this law.
According to the latest study from the California Department of Toxic Substances Control, extended exposure to these harmful chemicals could lead to cancer and birth defects, among other health issues.
Some nail polish es labeled "non-toxic" still contain high levels of dangerous chemicals, according to a new report by California's Department of Toxic Substances Control.
AANA Peer Assistance for CRNAs and student nurse anesthetists for chemical dependency, addiction, substance misuse or abuse.
But we should try to reduce the amount of pesticides used in our landscapes, whether chemical or organic insecticides, fungicides or herbicides, so toxic substances are not introduced needlessly into the environment.

In science:

It is a chemical mini-factory usually involving of the order of 500 to 1000 substances in a complex network of metabolic reactions.
The Blind Watchmaker Network: Scale-freeness and Evolution
NAD take part in very many chemical reactions producing new substances either needed in the chemical mini-factory itself to produce other substances, or needed in some other function in the cell, or in fact both .
The Blind Watchmaker Network: Scale-freeness and Evolution
Regarding inquiry into the nature of the metallic progenitor particles, we note that FIN may provide a means by which otherwise chemically unstable substances can persist.
A phenomenological theory of nonphotochemical laser induced nucleation
Two interacting chemicals can generate a stable, inhomogeneous pattern if one of the substances(the inhibitor) diffuses much faster than the other(the activator).
Effect of randomness and anisotropy on Turing patterns in reaction-diffusion systems
Recall that the Gibbs free energy G = µn for an equilibrium system of pure substance, where µ is the chemical potential of the substance and n is its amount meassured in moles.
Measuring the Entropy and Testing the Second Law of Thermodynamics