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Controlling termination products and regulating disproportionation and recombination reactions in the terminal step are important considerations in radical chemistry and polymerization. In some reactions (such as the one shown below) one or both of the termination pathways can be hindered by steric or solvent effects .
This means that during rate-retarded RAFT polymerizations, the rate of formation of termination products is suppressed to a greater extent than the rate of chain growth. In RAFT polymerizations without rate-retardation, the concentration of the active species P• is close to that in an equivalent conventional polymerization in the absence of ...
The termination steps of free radical polymerization steps are of two types: recombination and disproportionation. [2] In a recombination step, two growing chain radicals (denoted by •) form a covalent bond in a single stable molecule. For the example of a vinyl polymer,
Primary Products Ingredients Americas LLC (founded as A. E. Staley Manufacturing Company), also formerly known as Tate & Lyle Primary Products, is an American company that produces a range of starch products for the food, paper and other industries; high fructose corn syrup; crystalline fructose; and other agro-industrial products.
Among these genes, however, are regulators whose products allow the next set of phage genes to be expressed. One of these types of regulator is an antitermination protein. In the absence of the antitermination protein, RNA polymerase terminates at the terminator. When the antitermination protein is present, it continues past the terminator. [1]
After a riveting 15-week college football season filled with unforgettable moments and unexpected upsets, the highly anticipated College Football Playoff is set to commence. With 12 teams still in ...
In lithic reduction, termination type is a characteristic indicating the manner in which the distal end of a lithic flake detaches from a core (Andrefsky 1998:18). Common types include: Step/snap termination – these occur when a flake snaps or breaks during removal, resulting in an abrupt right-angle break.
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