What is a precursor product?
In chemistry, a precursor is a compound that participates in a chemical reaction that produces another compound. In biochemistry, the term “precursor” often refers more specifically to a chemical compound preceding another in a metabolic pathway, such as a protein precursor.
What is the use of precursors?
What are the licit uses of precursors? Precursor chemicals are required in many areas of the chemical industry, phar- maceuticals, cosmetics, perfumes, cleaning agents, pesti- cides, insecticides, fertilizers, lubricants, explosives as well as in various other industries (textiles, leather, etc.).
What is a simple precursor?
noun. a person or thing that precedes, as in a job, a method, etc.; predecessor. a person, animal, or thing that goes before and indicates the approach of someone or something else; harbinger: The first robin is a precursor of spring.
What is a metal precursor?
Metal oxides are prepared from precursors that contain the metal ions as building blocks for the (multi)metal oxide to be synthesized. For all of the precursors, both chemical and structural characterization is carried out of the different stages from precursor to final oxide. …
What is a legend drug or precursor?
A legend drug is a drug approved by the U.S. Food and Drug Administration that can be dispensed to the public only with a prescription from a medical doctor or other licensed practitioner.
What is a precursor license?
Class A Precursor Licence The Additional Alternative Responsible Person in Charge application form must be filled if the applicant intends on designating more than two Alternative Responsible Persons in Charge. This form must be submitted as part of the complete Class A precursor licence application package.
What is a Class A precursor?
Class A precursor. Class A precursor means, (a) any substance set out in Part 1 of Schedule VI to the Act; and. (b) any preparation or mixture referred to in Part 3 of Schedule VI to the Act that contains a substance referred to in paragraph (a).
What are examples of precursors?
The definition of a precursor is something or someone that came before. An example of a precursor is the dark clouds before a storm. Precursor is defined as something that led to the creation of something similar but new. An example of precursor is how radio came before but helped create television.
What is a precursor in genetics?
A protein precursor, also called a pro-protein or pro-peptide, is an inactive protein (or peptide) that can be turned into an active form by post-translational modification, such as breaking off a piece of the molecule or adding on another molecule. The name of the precursor for a protein is often prefixed by pro-.
Did the precursors become the Flood?
Some Precursors hid in stasis while others changed into the dust found by the ancient humans (the latter created the Flood). It was later revealed that the Flood was not a creation of the Precursors, but the Precursors’ perverted and insane remains of themselves.
What do precursors look like?
Precursors, are pure life, they don’t really have to look like anything. Like graveminds, they’re just masses of biomass at that stage. With enough genetic absorption, their appearance will become more defined. Highly evolved Chimeras.
What does precursor stand for?
Precursor Has Latin Roots. With its prefix pre-, meaning “before”, a precursor is literally a “forerunner”, and in fact forerunner first appeared as the translation of the Latin praecursor.
What does precursor mean?
Medical Definition of precursor. 1 : one that precedes and indicates the onset of another angina may be the precursor of a second infarction. 2 : a substance, cell, or cellular component from which another substance, cell, or cellular component is formed especially by natural processes.
What does precursor energetics mean?
Precursor Energetics. Precursor Energetics utilizes state-of-the-art inorganic and organometallic chemistry, coupled with advanced process engineering and materials science, to satisfy the need for high value advanced materials within the electronics and energy markets.
What is the plural of precursor?
precursor (plural precursors) That which precurses: a forerunner, predecessor, or indicator of approaching events. quotations ▼ (chemistry) One of the compounds that participates in the chemical reaction that produces another compound.