Hydrogen-bond method acidity assessment

In related work, Riley and Hobza have provided an assessment of the MP2 method in conjunction with several medium and extended basis sets in the study of various hydrogen bonded and dispersion bound complexes of biological relevance. They report that the MP2/cc-pVTZ method supports the most well balanced description of noncovalent interactions. However, the MP2 method does not provide reliable results for the cyclic hydrogen bonds found in nucleic acid base pairs in combination with any of the basis sets considered by these authors. 

For the assessment of the antioxidant activity of canolol, the 3-carotene-linoleic acid assay as well as the DPPH method was used. Using the 3-carotene-linoleic acid assay model system, rapid discolouration was observed in the absence of an antioxidant. The free linoleic acid radical, formed by abstraction of a hydrogen atom from one of its methylene gronps, attacks the P-carotene molecnles resnlting in the loss of double bonds and its characteristic orange colour. The rate of bleaching of the P-carotene solution was determined by measuring the difference between the initial... 

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