A Simple Method for Phase-contrast Microscopy: Improvements in Technique
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The following are the main improvements that we have made in the method of phase-contrast microscopy described by Kempson, Thomas, and Baker (1948): 1. No bull's-eye condenser is used. The illuminant is an electric bulb with a ‘porcelain-processed’, ‘flashed white’, or ‘opal’ surface. 2. No oiled paper is placed over the illuminating annulus. 3. The thickness of the deposit of magnesium fluoride on the phase-plate is controlled by observations on the interference colours given by surface reflections. 4. Positive (dark) phase-contrast is preferred for most purposes to negative (bright).
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1952 ◽
Vol 211
(1105)
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pp. 240-254
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1949 ◽
Vol 1
(1)
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pp. 639-640
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1947 ◽
Vol 37
(8)
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pp. 647
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1957 ◽
Vol 6
(4)
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pp. 151-165
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2006 ◽
Vol 1
(3)
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pp. 155-160
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