Parallel Reactions

Parallel Reactions

 

concurrent chemical reactions with at least one common reactant. The term is infrequently used when a common product results from different reactants. Examples of parallel reactions are (1)nitration of phenol with the formation of ortho-, meta-, and Pra-nitrophenol (identical reactants) and (2) nitration of a benzene and toluene mixture (nitric acid is the common reactant).

References in periodicals archive ?
This implied competing or parallel reactions. Burnham and Braun [15] proposed distributed reactivity models for the kinetic analysis of complex materials.
The integrated microfluidics system contains thousands of micromechanical valves in micrometer dimensions, controlling thousands of parallel reactions. Our research demands production of hundreds of such devices.
Earliest methods of sequencing short sections of purified DNA were chemical in nature and relied on the ability to selectively break DNA strands at specific bases (G, A and G, C, and C and T) in each of four parallel reactions. By allowing reactions only to proceed partially, each reaction on a population of identical DNA template molecules left a population with some members broken at each sensitive base.
It involves four species and it is composed by three parallel reactions:
Since this is a convergent plan, the first five stages involve parallel reactions, hence the total number of reactions in the plan (13) exceeds the number of stages (8).
This may be attributed to the existing of a redox reaction between NaN[O.sub.2] and [H.sub.2][O.sub.2] that later resulted in two competitive parallel reactions, viz.
It features an X, Y, Z robotic arm, can run up to 192 parallel reactions and features automated post-synthesis steps.
The DrySyn MULTI reaction block runs small scale single and multiple parallel reactions. It features an insert kit that allows combinations of standard glassware to be utilized, from 10 mL tubes to 100 mL flasks.
What makes this potentially bathetic episode truly stand out, aside from Ho's powerfully idiosyncratic performance, is her character's close relationship to her other child, her daughter, Grace (played with casual ease and warmth by Cindy Cheung), a fully realized young woman whose parallel reactions give depth and complexity to the richly layered story.
The kinetic parameters (apparent activation energy E and frequency factor A) were determined using the Friedman procedure, maximum pyrolysis rate method and parallel reactions model, respectively.
The precopolytransesterification step kinetic model takes into account the system of two competitive parallel reactions, as has been considered by Mathew et al.
So, kinetics of the first period can be approximately described as a process consisting of three consequent-parallel reactions, and that of the second period--as a system of two parallel reactions. The according scheme is depicted in Fig.

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