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In organic chemistry, neighbouring group participation (NGP, also known as anchimeric assistance) has been defined by the International Union of Pure and Applied Chemistry (IUPAC) as the interaction of a reaction centre with a lone pair of electrons in an atom or the electrons present in a sigma or pi bond contained within the parent molecule but not conjugated with the reaction centre.
Migratory aptitude is the relative ability of a migrating group to migrate in a rearrangement reaction. [1] Migratory aptitudes vary in different reactions, depending on multiple factors.
In organic chemistry, a coupling reaction is a type of reaction in which two reactant molecules are bonded together. Such reactions often require the aid of a metal catalyst.
Phenylalanine ammonia lyase is specific for L-phenylalanine, and to a lesser extent, L-tyrosine. [9] [10] The reaction catalyzed by PAL is a spontaneous elimination reaction rather than an oxidative deamination.
Chemical similarity (or molecular similarity) refers to the similarity of chemical elements, molecules or chemical compounds with respect to either structural or functional qualities, i.e. the effect that the chemical compound has on reaction partners in inorganic or biological settings.
In this instance it would be correct to say that infestation is exogenous within the period, but endogenous over time. Let the model be y = f ( x , z ) + u . If the variable x is sequential exogenous for parameter α {\displaystyle \alpha } , and y does not cause x in the Granger sense , then the variable x is strongly/strictly exogenous for ...
In supramolecular chemistry, [1] host–guest chemistry describes complexes that are composed of two or more molecules or ions that are held together in unique structural relationships by forces other than those of full covalent bonds. Host–guest chemistry encompasses the idea of molecular recognition and interactions through non-covalent ...
In other words, there is both an endogenous metabolome and an exogenous metabolome. The endogenous metabolome can be further subdivided to include a "primary" and a "secondary" metabolome (particularly when referring to plant or microbial metabolomes). A primary metabolite is directly involved in the normal growth, development, and reproduction.