A light source for endoscopy or microscopy comprises a lamp, a heat sink, the heat sink being thermally connected to the lamp and at least one heat pipe, which is thermally connected to the heat sink and which dissipates the heat that is generated by the lamp and transferred to the heat sink. The link information concerning a link between a first and a second domain comprises at least four pieces of information, domain identity of the first domain, domain identity of the second domain, link end identifier for a first end of the link, and link end identifier for a second end of the link. , which conditions and sanitizes the cotton fibers. A good abutment is provided both at the first abutment. The projections are designed so that a pressurised liquid located in the annulus will substantially flow into the cylinder’s working space. These compositions are appropriate for inhibiting the postoperative liver metastasis and recurrence of colorectal cancer.