844 research outputs found

    Executive Privilege in the Federal Courts

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    Apoptosis is one type of programmed cell death, important during tissue development and to maintain the tissue homeostasis. Apoptosis comprises a complex network of internal signaling pathways, and an important part of this signaling network is the action of voltageā€gated ion channels. The aim of this thesis was to explore the role of ion channels and the role of intracellular metal ions during apoptosis in Xenopus laevis oocytes. The reasons for using these oocytes are that they are large, robust, easy to handle, and easy to study electrophysiologically. Apoptosis was induced either chemically by incubation of the oocytes in staurosporine (STS) or mechanically by centrifugation of the oocytes. Ion currents were measured by a twoā€electrode voltage clamp technique, intracellular ion concentrations were measured either directly by inā€house developed K+ā€selective microelectrodes or indirectly by the electrophysiological technique, and apoptosis was measured by caspaseā€3 activation. Paper I describes that the intracellular K+ concentration was reduced by about 30 % during STSā€induced apoptosis. However, this reduction was prevented by excessive expression of exogenous ion channels. Despite the magnitude of the intracellular K+ concentration, either normal or reduced level, the oocytes displayed normal signs of apoptosis, suggesting that the intracellular K+ reduction was not required for the apoptotic process. Because the intracellular K+ concentration was not critical for apoptosis we searched for other ion fluxes by exploring the electrophysiological properties of X. laevis oocytes. Paper II, describes a nonā€inactivating Na+ current activated at positive membrane voltages that was upregulated by a factor of five during STSā€induced apoptosis. By preventing influx of Na+, the apoptotic signaling network involving capsaseā€3 was prevented. To molecularly identify this voltageā€gated Na channel, the X. tropicalis genome and conserved regions of the human SCNA genes were used as a map. Paper III, shows that the voltageā€gated Na channel corresponds to the SCN2A gene ortholog and that supression of this SCN2A ortholog using miRNA prevented cell death. In conclusion, this thesis work demonstrated that a voltageā€gated Na channel is critical for the apoptotic process in X. laevis oocytes by increasing the intracellular Na+ concentration

    The Statute of Frauds and the Parol Release of a Mortgage

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    Management Manuals and Training Resource Materials.

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    Paper presented to the Workshop on Management and Trianing for NGO Emergency Programmes. Management Training. (198)The digital Cuny Archive was made available in part through funding assistance from USAID.INTERTECT and Disaster Management Center, University of Wisconsi

    7. The 1970s

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    From View from the Deanā€™s Office by Robert McKersie. ā€œI had been on the job just a week when Keith Kennedy, vice provost, called and said we needed to make a trip to Albany to meet the chancellor of SUNY, Ernest Boyer. This was late August 1971. After a few pleasantries, it became clear that this was not just the courtesy call of a new dean reporting in to the top leader of the state university. Chancellor Boyer went right to the point: a new Labor College was going to open on the premises of Local 3 IBEWā€™s training facility on Lexington Avenue in Manhattan, and the ILR School had to be there as a partner. It was not clear what unit of SUNY would take over the Labor College, but it was clear that given its broad mandate for labor education, the ILR School was going to play a key role.ā€ Includes: View from the Deanā€™s Office; From Eric Himself; Another Perspective; Labor College Graduation: VanArsdaleā€™s Dream Fulfilled; The View of a Visiting Faculty Member; Another Perspective; and The Studentā€™s View
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