precursor


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precursor

a chemical substance that gives rise to another more important substance
References in classic literature ?
One day, taking a pair of shoes to be mended, he saw the cobbler's wife seated by the fire, suffering from the terrible symptoms of heart-disease and dropsy, which he had witnessed as the precursors of his mother's death.
Curious to discover of what strange events these novel sounds might be the precursors, and not a little desirous to catch a sight of the instruments which produced the terrific noise, I accompanied the natives as soon as they were in readiness to depart for the Taboo Groves.
The followers of Chaucer, and the precursors of Shakespeare, are alike real persons to him--old Langland reminding him of Carlyle's "Gospel of Labour." The product of a large store of reading has been here secreted anew for the reader who desires to see, in bird's-eye view, the light and shade of a long and varied period of poetic literature, by way of preparation for Shakespeare, [9] (with a full essay upon whom the volume closes,) explaining Shakespeare, so far as he can be explained by literary antecedents.
The mediaeval burgesses and the small peasant proprietors were the precursors of the modern bourgeoisie.
These two pursuits have thus in a manner been the pioneers and precursors of civilization.
All were apprehensive of worse to come, and this was especially true of the seamen who recalled all sorts of terrible omens and warnings that had occurred during the early part of the voyage, and which they could now clearly translate into the precursors of some grim and terrible tragedy to come.
Fact.MR has announced the addition of the "Solution Deposition Precursor Market Forecast, Trend Analysis & Competition Tracking - Global Market insights 2018 to 2028"report to their offering.
'The Chinese pharmaceutical industry consists of more than 5,000 companies that produce active pharmaceutical ingredients which can include synthetic substances and precursor chemicals,' said the report, citing the US-China Economic and Security Review Commission.
Summary: Increasing Use of TAED in Laundry Detergents to Accelerate the Growth in Bleach Precursor Market
It led to the discovery of amyloid precursor protein that produces deposits of amyloid fragments in the brain which is the suspected culprit of Alzheimer's disease.
Of the total, the ANF seized 33 MT of narcotics in 2007, in 2008 74 MT narcotics and 17 MT precursors chemicals, in 2009 71 MT narcotics and in 2010 the authorities seized 98 MT narcotics and 68 MT precursor chemicals.
According to officials, the Standard Operating Procedure (SOP) 2010 for local purchase, consumption, distribution, manufacturing and transportation of the precursor chemicals have been reviewed and revised.