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SUMMARY:PLEASE NOTE SEMINAR CANCELLED - Jochen Guck\, Universitt Leipzig
DTSTART:20060313T100000Z
DTEND:20060313T110000Z
UID:TALK4808@talks.cam.ac.uk
CONTACT:Duncan Simpson
DESCRIPTION:Light has been central in the life sciences to visually invest
 igate cells. In recent years it has increasingly been used to also manipul
 ate biological samples by optically induced forces. Besides trapping\, mov
 ing\, and rotating cells\, optical traps can even deform cells in a contro
 lled and nondestructive way. The deformation of cells with such an optical
  stretcher can be used to gain insight into the structural properties of t
 he cytoskeleton of cells. In addition\, the deformability of cells has tur
 ned out to be a very sensitive inherent cell marker for any cellular chang
 e that is mirrored in the cytoskeleton. This contact-free\, tactile approa
 ch can be used to diagnose cancer and to identify and sort stem cells from
  heterogeneous populations. In turn\, light can also be actively manipulat
 ed by cells. Current research shows that there are glial cells in the reti
 na that serve as optical fibers with saturable transmission. This discover
 y sheds new light on the retina as an optical system and might help explai
 n the paradox of its inverted structure.
LOCATION:Mott Seminar Room\, Cavendish Laboratory
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