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The role of family structure in adolescence has been linked to a host of problem behaviors, including marijuana use. This paper investigates the relationship between family structure and marijuana use, and elaborates previous research by 1) exploring several intervening mechanisms that affect the relationship, and 2) examining the effects of a variety of family forms. Analyses of data from the National Youth Survey (1977-79) indicate that 1) a parental divorce or living with a stepparent decreases family attachment among adolescents; 2) attenuated family attachment and involvement increase the likelihood of associating with drug-using peers; and 3) less family involvement and increased associations with drug-using peers increase the probability of initiating marijuana use and elevate frequency of use.

We have analyzed an ordered library of 4,608 cDNA clones from the CEM human leukemic cell line. The aim was to facilitate gene retrieval, to enable immediate access to cDNA clones and to provide information on the protein expression of the individual clones in a 2D gel readout. The matrix array of 24 x 16 x 12, each position of which contained lambda jacII phage from one plaque, enabled us to establish pools of clones along the three axes (24 pools of complexity 192 cloned entities, 16 pools of complexity 288 and 12 pools of complexity 384). The total cDNA complexity is here reduced to such a level that spots which in more complex gels served as landmark spots are not present in each pool, and thus cannot serve as landmarks anymore. The image analysis of such gels and especially the matching of spots is not reliable under these circumstances. In order to achieve reliable matching, additional samples were created, such that pools were co-electrophoresed according to a special concatenation scheme; these samples then contained over-lapping elements (e.g., pools 1 + 2 + 3 and 3 + 4 + 5 have at least those spots in common, which originate from pool 3). This approach turned out to be feasible and we have completed the matching of one half of the ordered library. Already from the present stage of analysis we have obtained valuable information on the cDNA library and on the distribution of clones in this library.

An examination of the origins of the laws prohibiting the use of opiates in the United States is provided. The primary focus is on how the development of these laws influenced a marked shift in the perception of opiates. Historically, opium and its derivatives have been perceived as efficacious medicines. However, during the past two centuries this perception has shifted to the point that contemporarily the opiates are commonly thought of as a social menace. This perception now outweighs the efficacious medicine perception to a substantial degree. A historical analysis indicates that this shift occurred not so much because the hazardous potential for addiction and overdose was discovered, nor because recreational use became widespread; rather, this shift was greatly influenced by underlying national economic conditions and concerns.