BIOL 311 Lecture Notes - Lecture 3: White Spot, Microfilament, Microtubule
17 Sep 2016
School
Department
Course
Professor
Document Summary
1655 - robert hooke - coined the term cells . 1674 - anthony van leeuwenhoek described bacteria and protozoa. 1838 - schleiben and schwann - came up with the cell theory. Abbe - equation textile dyes became the rage; were used to stain cells. 1900s unclear whether brain cells are actually cells. 2 theories: reticular theory: brain cells are not cells, but rather a reticulum (ie. blood vessels, neuronal theory - neurons are cells. Two groups: diffraction limited > all about the wavelength of light/illuminating source, not diffraction limited. Theoretical limit of resolution (not in tb) best. Practical limit of resolution less than the best cells are poor candidates for microscopy compared to alternatives. Organic compounds stability) ringed great at absorbing heat (when absorb heat, begins moving around less cells have little to no contrast (often have to stain them)
