Abstract: The disclosure relates to a connection device, in particular a heavy-duty plug-type connection, with a first connector and a second connector, which each have a contact-making element in order to produce an electrical connection in the connected state of the connectors; the connectors bearing against one another at a connection region in the connected state; at least one of the connectors comprising a coolant line with one or more access points for the supply and discharge, respectively, of a coolant; the coolant line being provided at the contact-making element in order to dissipate heat from a contact point between the contact-making elements; all of the access points of the coolant line being arranged outside of the connection region.

Abstract: The disclosure relates to a connection device, in particular a heavy-duty plug-type connection, with a first connector and a second connector, which each have a contact-making element in order to produce an electrical connection in the connected state of the connectors; the connectors bearing against one another at a connection region in the connected state; at least one of the connectors comprising a coolant line with one or more access points for the supply and discharge, respectively, of a coolant; the coolant line being provided at the contact-making element in order to dissipate heat from a contact point between the contact-making elements; all of the access points of the coolant line being arranged outside of the connection region.

Abstract: An immersion oil formulation for use in microscopy and related optical fields consists of a blend of a dialkyl phthalate, a butyl benzyl phthalate and chlorinated paraffin. The compounds, when blended, possess a desired optical property including a refractive index of 1.518 or thereabouts and an extremely low fluorescence enabling the immersion oil to be utilized in the field of fluorescence microscopy. The resultant blend also possesses a low toxicity and therefore eliminates all the disadvantages of prior art immersion oils which contain PCBs or which exhibit undesirably high auto fluorescence.