ECE4084 Lecture Notes - Lecture 1: Transmission Electron Microscopy, Scanning Electron Microscope, Microscopy
24 Jul 2018
School
Department
Course
Professor
Document Summary
History of cell science and the tools of. There are three strands of cell biology - cytology, biochemistry and genetics - which were considered quite distinct areas for a while until woven together to form modern cell biology. They are the smallest structural units that possess and exhibit the basic characteristics of life. There are four major cell types - epithelial, fibroblasts, myocytes and neurons. In cell biology, measurements are made in micrometers (microns ( m) - 10-6m). The naked eye can only see down to 10-4m. There are three main parameters in microscopy - magnification (ratio of an objects image size to its real size), resolution (clarity of the image; minimum distance two dots can be separated but still distinguished as two dots) and contrast. There are different forms of microscopy: microscopy is limited to the shortest wavelength of light: light microscopy: can see down to 10-7m.
