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The ultrastructure of telophase to interphase has been followed in a green alga, Spirogyra submargaritata. A series of changes transitional between the late anaphase chromatid, the decondensing chromatid of telophase, and the 'pale fibrillar material' occupying channels in the nucleolus at interphase have been demonstrated. Early stages in the regeneration… (More)
The ultrastructure of somatic mitosis in the germlings of Apoglossum ruscifolium, Kylin, fixed from its natural habitat, was examined to investigate spindle-pole development and the role of the 'polar ring'. It was found that the polar ring originates from a special nuclear pore raised above a small projection of the nuclear envelope. The initiation of… (More)
In early 1990, Taco Bell launched a major study to develop a comprehensive and integrated Labor Management System in order to manage and optimize a payroll that exceeds $500 million per year. The core of this system is an object oriented simulation model that determines the amount and deployment of labor required in a restaurant in order to meet a given… (More)
New cell inclusions, 'tubular elements' are described from the blue-green alga Calothrix marchica. These structures are found in about 20% of all cells observed. They are 18-22 nm in diameter, apparently composed of sub-units of which the estimated number, as seen in transverse section, is 8-10.