Publications by authors named "G Plickert"

This study assesses the relationship of parental anger on children's anger and self-derogation from adolescence to young adulthood. We examine a life-course perspective and incorporate theories of emotion regulation and self-referent behavior. Using structural equation models and hierarchical growth curve models with the Kaplan Longitudinal and Multigenerational data, the results indicate that parental anger leads to anger in adolescence, supporting theories of learning through modeling in adolescence.

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Sociologists have neglected the politically channeled and racially connected role of leveraged debt in mass incarceration. We use qualitative and quantitative data from California, circa 1960-2000, to assess how Republican entrepreneurial leveraging of debt overcame contradictions between parochial preferences for punishment and resistance to paying taxes for building prisons. The leveraging of bond debt deferred and externalized the costs of building prisons, while repurposed lease revenue bonds massively enlarged and extended this debt and dispensed with the requirement for direct voter approval.

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With the rapid increase of the quantity of molecular data, many animals joined the ranks of the so-called 'emerging models' of Evo-Devo. One of the necessary steps in converting an emerging model into an established one is gaining comprehensive knowledge of its normal embryonic development. The marine colonial hydrozoan Hydractinia echinata - an excellent model for research on stem cells, metamorphosis, and allorecognition - has been studied for decades.

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Hydractinia, a representative marine colonial hydroid, was the first organism in the history of biology in which migratory precursors of germ cells were described and termed "stem cells" (Weismann, 1883). These stem cells, now known as interstitial cells (i-cells), are thought to remain pluripotent throughout their life. Using animals depleted of their own stem cells and repopulated with allogeneic mutant donor stem cells, it was shown that Hydractinia i-cells differentiate into any cell type including epithelial cells and germ cells that express germ line markers such as Vasa, Piwi and Nanos.

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The evolutionary origin of stem cell pluripotency is an unresolved question. In mammals, pluripotency is limited to early embryos and is induced and maintained by a small number of key transcription factors, of which the POU domain protein Oct4 is considered central. Clonal invertebrates, by contrast, possess pluripotent stem cells throughout their life, but the molecular mechanisms that control their pluripotency are poorly defined.

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