The phrase "availability of a substance" is correct and usable in written English.
It can be used in contexts discussing the presence or accessibility of a particular chemical or material.
Example: "The availability of a substance is crucial for the success of the experiment."
Alternatives: "accessibility of a substance" or "presence of a substance".
The SED is a tool to predict the systemic availability of a cosmetic substance; however, this relationship is not straightforward.
Data derived from controlled clinical trials form the prerequisite on which the status of approval, the approved indications and also the availability of a certain substance may prompt the treating physician to consider it within his or her repertoire based on his or her available knowledge and experience in the diagnosis, treatment and assessment of RA.
In fact, it is almost understandable the presence of obsidian artefacts (group #1) from Sicily/Flegrean areas whereas it is quite interesting the presence of obsidian artefacts made by material coming from East Mediterranean area (also considering the large availability of such substance in Italy).
A problem with this format of harm ratings is that it does not take account of availability of the substance in question, for example, that alcohol might be highly ranked due to its low cost and widespread availability.
Other factors contribute to suicide and include: genetic loading, personality characteristics (impulsivity, aggression), psychiatric and physical disorders (pain, incapacity), life events (loss, trauma), social isolation, availability of means, substance abuse, economic condition [ 1, 2].
However, systemic plasma availability is probably not essential as a measure of antiparasitic activity; it is the availability of the toxic substance to the parasites that really counts.
Reasons given for using substances include to relax, to relieve stress, to experiment, to feel normal, to be accepted by peers, easy availability of the substances and the confidence to commit a crime.
The panel, while commending the Pentagon for taking steps in recent years both to curb prescription drug abuse and expand availability of substance abuse programs, asserts the military needs to do more to reduce the stigma attached to seeking substance abuse treatment.
Some were prepared to talk about the issue privately and a common theme was the ready availability of banned substances at local gyms.
