The mechanisms underlying clustering of substance abuse-related deaths in families of HIV/HCV-co-infected individuals require better understanding.
There was considerable clustering of substance use at the patient level as indicated with an ICC of 0.25.
The clustering of substance use-related risk behaviours (i.e. alcohol use, cannabis use, and cigarette smoking) was also found in other studies among adolescents in general [ 15, 16, 21], whereas prior research among students attending vocational education showed an association between binge drinking, cannabis use and cigarette smoking [ 29].
Clusters of all substances except helium and possibly hydrogen are solidlike at low temperatures as expected.
The maximum charge has been boosted by replacing sheets of silicon with tiny clusters of the substance to increase the amount of lithium ions a battery can hold on to.
Depending on concentration of substances, clusters of more than one ion can occur.
The percolation threshold is the concentration showing the maximum probability to obtain, for the first time, a percolating cluster of a substance.
Although media reports can have many limitations (e.g., often sensationalist and can frequently include incorrect information regarding substances involved), they can be valuable in identifying clusters of harms related to substance use that warrant further investigation.
In addition to being a valuable early indicator of clusters of harms related to substance use, the proposed system would also require relatively little investment of resources.
For instance, Nanoprobes, based in Yaphank, N.Y., makes probes by attaching streptavidin and other substances to clusters of gold atoms about 1.4 nanometers in diameter.
