Week 2, Lecture 2, A Tour of The Cell 1

Week 2, Lecture 2, A Tour of The Cell 1 -...

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Unformatted text preview: 13-Sep-09Gardiner1A Tour Of The CellB I O L O G Y 0 2 313-Sep-09Gardiner2 The term Microscope was first coined by members of an Italian scientific society that included Galileo13-Sep-09Gardiner3Early Microscope Anthony van LeeuwenhoekSingle Lens - ca. 1673Spiral BacteriaFungal SporesB I O L O G Y 0 2 313-Sep-09Gardiner4B I O L O G Y 0 2 313-Sep-09Gardiner513-Sep-09Gardiner6Robert HookeThe Cell: first person to coin the word 'cell' to describe the tiniest components of living systems - plants!1635 - 1703B I O L O G Y 0 2 313-Sep-09Gardiner7The Electron Microscope Resolution limit of Light Microscope is about 0.2 microns (size of a small bacterium remember 1 micron is .001mm) Magnification limit of about 1000 times In 1950s the introduction of the electron microscope enabled organelles, viruses, proteins, etc.. to be imagedB I O L O G Y 0 2 313-Sep-09Gardiner8The Transmission Electron Microscope or TEMB I O L O G Y 0 2 313-Sep-09Gardiner9The Scanning Electron Microscope or SEM13-Sep-09Gardiner1013-Sep-09Gardiner11B I O L O G Y 0 2 313-Sep-09Gardiner12Fig. 5-4a, p. 94B I O L O G Y 0 2 313-Sep-09Gardiner13The First Practical Electron MicroscopeA Canadian DesignDesigned by two graduate students at University of Toronto - 1937 1938James Hillier and Albert PrebusDesign adopted by RCA and developed into a prototype of a commercial seriesB I O L O G Y 0 2 313-Sep-09Gardiner1413-Sep-09Gardiner1513-Sep-09Gardiner16Units of Measurement 1 metre (m) = 100 centimentres 1 centimetre (cm) = 10 millimetres 1 millimetre (mm) = 1000 microns 1 micron (m) = 1000 namometres 1 namometre (nm) = 10 Angstroms 1 Angstrom () = 0.0000000001 meter (10-10m)The minimum resolution...
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Week 2, Lecture 2, A Tour of The Cell 1 -...

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