Subjects received test substances only if an "open and close" door sequence (time, 2.5 min) in the pretest period, also done during the adaptation phase, did not elicit any change in conductance greater than our defined threshold of 0.5 μS approximately 20 sec after the introduction of the substance.
(A consequence of this idea would be that Aristotle is radically altering his conception of the importance of the species, which in the Categories he called a secondary substance, that is, a substance only in a secondary sense).
Furthermore, the example of per- and polyfluorinated alkyl substances (PFAS) indicates the need to look beyond the list of registered substances: only 5% of PFAS have a CAS Registry Number as a unique, unmistakable identifier for chemical substances.
For instance, the EPA's Toxics Release Inventory (TRI), which requires release of industries' use of listed hazardous substances, only applies to 683 chemicals—a fraction of the more than 80,000 substances in use today.
In other words, the concrete accidental terms label substances by means of the accidental forms from which they draw their names, so that they name substances only qua bearers (subiecta) of a form.
It has been urged that it is a voluntary or rather an extrajudicial affidavit, made before a person not appearing to be a magistrate, and contains the substance only of a letter, of which the original is retained by the person who made the affidavit.
A CSR has to be provided for specific registered substances only; however, in workplaces, mixtures of substances are commonly used [22].
"Hence, these substances only exist because of the blockade of MDMA production.
Armstrong took illegal substances only in order to compete on the same track as everyone else.
Despite lurid headlines, NPSs (new psychoactive substances) only account for 4% of legal and illegal drug-related deaths.
