An immunogenic composition containing a glycan conjugate including a carrier protein, and a glycan including Globo H, an immunogenic fragment thereof, or stage-specific embryonic antigen-4, wherein the glycan is conjugated with the carrier protein through a linker. The system takes a digital video image and compares the image to a library of images of potential interest. The cap includes an inner cylindrical wall to which the gel in bonded, thereby providing a sealing area between the device and the wound in a body wall. The X-ray tube assembly is attached to a motor-driven movable stand arm and can be displaced using a control unit. There is also provided a measurement appliance with such a device, and a method for introducing a reference liquid into a measurement appliance.