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Building high-quality concurrent software is a significant challenge. Issues such as performance, scalabil-ity, extensibility, and correctness, form a complex web of design decisions that software developers must navigate. In a number of well-understood software domains, reduction in the complexity of sequential software design has been enabled by the(More)
In earlier research we isolated and characterized three endosomal fractions from livers of estradiol-treated rats (1987. Belcher et al. Proc. Natl. Acad. Sci. USA. 84: 6785; 1989. Jäckle et al. Proc. Natl. Acad. Sci. USA. 86: 1880). We now describe the isolation of comparable endosomal fractions from untreated rats. The fraction of lowest density was(More)
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