Biology- microscopes

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  • Microscopes
    • Magnification
      • Image size= actual size x magnification
        • I            A x  M
    • Common stains
      • methylene blue- stains nuclei and chromosomes blue
      • ethanoic orcein- stains DNA reddish/purple
      • phloroglucinol- stains lignin found in plant cells, red
      • iodine solution- stains starch blue/black
    • types of microscopes
      • light
        • viruses, molecules and atoms cannot be veiwed
        • doesn't kill specimen
        • cannot magnify more then 2000x
        • cheaper
      • electron
        • cannot use live specimen
        • see specimen in more detail due to higher magnification
        • can view viruses, molecules and atoms
        • expensive

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