After adjusting for the effects of wave, sex, school type, parental divorce/separation and level of parental education, adolescent self-harm was associated with an elevated risk of licit and illicit substance use/dependence for every category of substance.
Opiates along with these synthetic drugs — chiefly methadone and fentanyl — are grouped together into the category of substances called opioids.
But the plant and its compounds are still illegal under US federal law, consigned to the most restricted category of substances — schedule 1.
In 2005, the most recent year for which figures are available, 48,604 children suffered reactions to vitamins alone, the ninth-largest category of substances associated with reactions in that age group.
The Controlled Substance Analogue Enforcement Act of 1986 (Analogue Act) identifies a category of substances substantially similar to those listed on the federal controlled substance schedules, 21 U. S. C. §802 32)(A), and then instructs courts to treat those analogues, if intended for human consumption, as controlled substances listed on schedule I for purposes of federal law, §813.
A further distinction is whether the Principle concerns all items in the ontology or it is restricted to just the category of substances (ie things which have properties and/or relations but are not themselves properties and/or relations).
Antioxidants are a very large category of substances, because many chemical entities may exert a direct or indirect antioxidant activity.
For convenience, this category of substances has been narrowed down to those oxygenated-PAHs containing carboxylic oxygen atoms in the form of a quinone or ketone.
To improve and standardize the read-across assessment, it is therefore useful to identify different scenarios into which it would be possible to allocate any category of substances or substance analogues.
Pesticides belong to another category of substances widely discussed in literature as affecting sperm quality and chromatin integrity [ 37, 38]; but, potentially also affecting the offspring through preconceptional exposure of the father.
The rapporteur therefore proposes that medicinal products should be included in the definition of scheduled substances and that a new category of substances should be created so that the controls applicable to scheduled substances can be made a little more flexible.
