Fiber spinning of two polymer compositions wherein one of the compositions contains carbon nanotubes produces structures such as fibers, ribbons, yarns and films of carbon nanotubes. The methods employ a polyamine analog, or salt or protected derivative thereof. An interceptor receives the context information and modifies the message context for Web service compatibility. The invention further provides a cell culture comprising a population of non-terminally differentiated cells immortalized by the methods of the present invention and kits comprising reagents that promote the immortalization of precursor cells. The asymmetric element can disposed within an evacuated part of the accelerator and rotated by way of an electromagnetic interaction with parts outside the evacuated part.