Definition
A member of the class of nitrosamines that is butan-1-ol substituted by a pyridin-3-yl group at position 1 and by a methyl(nitroso)amino group at position 4. It is a major metabolite of nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK), which is a carcinogen found in tobacco and responsible for inducing lung cancer in smokers.
Definition
A mental disposition towards repeated episodes of abnormally high levels of motivation to engage in a behaviour, acquired as a result of engaging in the behaviour, where the behaviour results in risk or occurrence of serious net harm.
Comment
This entity focuses on abnormal motivation to engage in a behaviour and includes serious net harm as a feature. The reason is to limit the class to things that merit a treatment and public health response. It is a quantitative entity and a fuzzy set because there can be varying thresholds set for degree of harm and strength of motivation. As a result, it is essential to operationalise the term for it to be meaningful.