Subject polar group factor

Similarly to peroxycarboxylic acids, DMDO is subject to cis or syn stereoselectivity by hydroxy and other hydrogen-bonding functional groups.The effect is strongest in nonpolar solvents. For other substituents, both steric and polar factors seem to have an influence, and several complex reactants have shown good stereoselectivity, although the precise origin of the stereoselectivity is not always evident. ... 

At the same time, the IR spectrum of recycled PS almost coincides with that of the virgin polymer because commercial PS is stable, and it is not subject to prolonged exposure to operating factors involving photochemical and thermo-oxidation processes. Because wood contains polar -OH, -OOH and -COOH groups, it is natural to assume, that PWC components are capable of specific (for example, hydrogen bonding) chemical interactions... 

Activation of protective mechanisms occurs when the harmful substance penetrates into the body. The penetration rate of pollutants and their distribution in the body, however, as well as the range of detoxification or elimination mechanisms, is subject to anatomical, physiological, biochemical and other factors. Phase 1 biotransformation typically involves changes catalysed by hydrolases and oxidases, in which polar functional groups are... 

Several chalconide diatomics of the carbon group are also subject to similar modification of their atomic valence spheres. Since these effects have not been calculated, an approximation, which assumes a polarization factor of a = 2(/ + — p ), calculated with unmodified atomic radii, with the special scale factors shown in Table 17, was found to give results in good agreement with experiment. 

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