844 research outputs found
Executive Privilege in the Federal Courts
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 voltageāgated 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 twoāelectrode voltage clamp technique, intracellular ion concentrations were measured either directly by ināhouse developed K+āselective microelectrodes or indirectly by the electrophysiological technique, and apoptosis was measured by caspaseā3 activation. Paper I describes that the intracellular K+ concentration was reduced by about 30 % during STSāinduced 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 nonāinactivating Na+ current activated at positive membrane voltages that was upregulated by a factor of five during STSāinduced apoptosis. By preventing influx of Na+, the apoptotic signaling network involving capsaseā3 was prevented. To molecularly identify this voltageāgated Na channel, the X. tropicalis genome and conserved regions of the human SCNA genes were used as a map. Paper III, shows that the voltageāgated 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 voltageāgated Na channel is critical for the apoptotic process in X. laevis oocytes by increasing the intracellular Na+ concentration
Understanding Business District Revitalization and Design in Small Communities: A Revitalization and Design Study of Galax, Virginia
Fundamentals of Testing Stabilized Coal Combustion Residuals for Encapsulation and Beneficial Use
Management Manuals and Training Resource Materials.
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
From View from the Deanās Office by Robert McKersie. āI 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 IBEWās 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 Deanās Office; From Eric Himself; Another Perspective; Labor College Graduation: VanArsdaleās Dream Fulfilled; The View of a Visiting Faculty Member; Another Perspective; and The Studentās View
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