Processes for producing toners are provided. Methods of making the novel synthetic ganglioside compounds and compositions as well as their use in the field of neuroprotection and cancer treatment is also described. The radiation source can have a low operating voltage, a high switching speed, and provides great design freedom. 9, the shape and the size of the contact holes to be formed even in a film of different material and film thickness can be nearly the same in both of the contact holes. The diffusion pump also includes a reservoir in fluid communication with the chamber for supporting a diffusion pump fluid and a heater for vaporizing the diffusion pump fluid in the reservoir to a vapor. When information of content data files are provided to an external device in response to a request from the external device, if a number is specified in the request, a specified number of information are transmitted to the external device in an order from a newest content data file from among the content data files.