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spec: There are also some small differences in the injection technique . Most of the biocide and buffer passed the service line branching point and was carried into the storage tank , but a small fraction remained in the injection tee or was diffused into the service line . I cut back on the R in that injection , but I generally do n't cut back on the NPH . Apple Corps faces a similar bill for its own legal expenses . Getting buy-in from political parties and the legislatureIt is often difficult to persuade politicians to adopt regulations that they themselves will be affected by . Rather , the unsterile method of use , unpredictable concentrations in street samples , adulterants in the injection mixture , and the lifestyle necessary to procure drugs are responsible for most heroin-associated medical complications . Some resources are strategic - outlining the overall direction of an organization to respond to its markets and opportunities . I joined the faculty of the college in January 1985 and taught there until May 1988 . The limitations of current IGPs with respect to traffic and resource control are highlighted .