Dioxin is formed in small amounts as a by-product in the synthesis of the herbicide 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), in chlorine-based bleaching processes during paper production, and whenever organic material burns in the presence of a source of chloride ion Cl−, as in forest fires, for example.
Whenever a material consisting of two or more component phases with different properties is subjected to stress, in general, the phases deform differently.
Still, the site's future plans are promising: FairShare plans to eventually introduce a revenue-sharing system that would allow sites that have distributed their content under appropriate licenses to get a cut whenever their material is published elsewhere.
Whenever the material picked up by an animal is to be used as the tool, the animal subsequently grasps the hair taut between its two hands.
We accessed supplementary materials posted on a journal's or author's Web site whenever such materials were mentioned.
Whenever possible, materials were resourced in situ in order to minimise the environmental impact of the new buildings.
In particular, we discuss the use of extensible markup language (XML) to address the problem of representing structurally varied experimental data in a data management system without having to make modifications to the core software parts whenever the materials processing or characterization tools or sample and data handling procedures change.
Students were stimulated to use, whenever possible, materials easily available, such as recyclable ones.
And at the urging of a prominent critic who successfully filed a complaint alleging bias in a specific course, Dr. Kopelow said his group was reviewing a proposal that would require educators to notify doctors and furnish corrective materials whenever it is later found that the class material was biased in favor of a drug firm.
