Abstract: A tip for a biomagnetic particle transfer device generally includes a solid body made from a highly magnetically permeable material and having a shape adapted to concentrate a magnetic field generated by the transfer device on the body. The tip body preferably includes a truncated cone-shaped portion and a solid probe portion. The cone-shaped portion defines an attachment end engageable with an end of the transfer device and an apex opposite the attachment end. The probe portion extends from the apex of the cone-shaped portion, and the magnetic field is concentrated on the probe portion.

Abstract: A tip for a biomagnetic particle transfer device generally includes a solid body made from a highly magnetically permeable material and having a shape adapted to concentrate a magnetic field generated by the transfer device on the body. The tip body preferably includes a truncated cone-shaped portion and a solid probe portion. The cone-shaped portion defines an attachment end engageable with an end of the transfer device and an apex opposite the attachment end. The probe portion extends from the apex of the cone-shaped portion, and the magnetic field is concentrated on the probe portion.

Abstract: A solid free form model of a complex structure, such as a molecular structure, and a method of making such a model. The model includes a first elongated strand extending along a first path corresponding to the locations of selected elements to represented, a second elongated strand extending along a second path spaced from the first path and a connecting leg extending between the first and second strands along a path corresponding to the vector along which a force, such as a hydrogen bond, acts on the modeled elements.