The Home Office has been working for at least 10 years on a roadside drug screening device, but they say that as well as the problem of substance diversity, it has proved difficult to devise a small, easy to use device that can withstand all weather conditions.
The students' diverse objects provide intimate windows on these cultures, and in the process, show how understanding the very substance of diversity actually reveals a more concrete sense of our shared New York and American identity.
Availability and supply analysis of novel psychoactive substances (NPS) is complicated by sheer substance variety, the introduction of ever-newer compounds, linguistic diversity, evolving usage patterns in various nationalities or communities, and a shifting regulatory and legal landscape.
In his book "The Brother in Elysium," the American poet William Bronk wrote that both Whitman and the sea "shared in some cosmic and elemental passion," and that Whitman "was that same substance as the sea, which united all substances and all diversity within its similitude".
This could be due to their ability to utilize a wide array of organic-often refractory substances, their metabolic diversity, and their ability to grow in oligotrophic conditions, with the latter being more obvious in the marine environment.
'Human reason is a tincture infused in about equal strength in all our opinions and ways, whatever their form: infinite in substance, infinite in diversity'[22] says the chapter on custom.
Chalcones are ubiquitous substances found in a diversity of plants.
Boyle's chemical theory attempts to explain the diversity of substances, including the elements, in terms of variations of shape and size and mechanical arrangements of what would now be called sub-atomic atoms or corpuscles.
Microorganisms produce a range of chemical substances representing a vast diversity of fascinating molecular architectures not available in any other system.
However, this development is hampered by the difficulties that accompany the assessment of molecular mechanisms and pharmacological actions of multicomponent preparations that contain an enormous chemical diversity of substances [ 1- 3].
