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SUMMARY:The Interaction of Light with Cells - Dr Jochen Guck (Universität
  Leipzig)
DTSTART:20060615T100000Z
DTEND:20060615T110000Z
UID:TALK5045@talks.cam.ac.uk
CONTACT:vh233
DESCRIPTION:Light has been central in the life sciences to visually invest
 igate cells.\nIn recent years it has increasingly been used to also manipu
 late biological\nsamples by optically induced forces. Besides trapping\, m
 oving\, and rotating\ncells\, optical traps can even deform cells in a con
 trolled and\nnondestructive way. The deformation of cells with such an opt
 ical stretcher\ncan be used to gain insight into the structural properties
  of the\ncytoskeleton of cells. In addition\, the deformability of cells h
 as turned\nout to be a very sensitive inherent cell marker for any cellula
 r change that\nis mirrored in the cytoskeleton. This contact-free\, tactil
 e approach can be\nused to diagnose cancer and to identify and sort stem c
 ells from\nheterogeneous populations. In turn\, light can also be actively
  manipulated\nby cells. Current research shows that there are glial cells 
 in the retina\nthat serve as optical fibers with saturable transmission. T
 his discovery\nsheds new light on the retina as an optical system and migh
 t help explain\nthe paradox of its inverted structure.
LOCATION:Small Lecture Theatre\, Cavendish Laboratory\, Department of Phys
 ics
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