Prevalence of pollen food allergy syndrome (PFAS) varies by geographic location and is between 2% and 70% based on the study. Pollen food allergy syndrome can presents as a spectrum of symptoms ranging from isolated oropharyngeal symptoms to anaphylactic shock. Treatment of PFAS needs to factor in risk of severe reaction, quality of life, cost, and patient preference. Risk assessment will be able to be more individualized as additional component testing becomes available.

Values of s and s R , for use in linear free energy relationships, are determined for para hydrogen atoms having nuclear charges other than 1 (nucleomers). Hammett r values for a variety of free energies of activation, reaction, and other extrathermodynamic properties (e.g., vibrational frequencies) are computed therefrom and compared to those computed using typical para functional groups. The nucleomer correlations show excellent qualitative agreement with standard correlations but the quantitative agreement is less good, typically underestimating the standard r-value by 10-60%.

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