The Simultaneous Labeling of Cells in Different Segments of the Mitotic Cycle with Tritiated Thymidine and Colchicine and the Effect of Colchicine on Thymidine Uptake

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Treatment of Pisum root meristems with nutrient solutions containing tritiated thymidine (H3-T) and colchicine simultaneously labeled cells in two different segments of the mitotic cycle. Tracings of the serial progression of these differently labeled cells through mitosis resembled sine-cosine curves. When the labeled cells are in interphase the sign of the curves is negative, when they are in mitosis the sign is positive. The concept of the mitotic cycle in terms of trigonometric functions was presented as one way of transferring cycle from a celestial time scale to that of a biological clock.

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Van't Hof, J. & Ying, Huei-Kuen October 14, 1963.

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  • Main Title: The Simultaneous Labeling of Cells in Different Segments of the Mitotic Cycle with Tritiated Thymidine and Colchicine and the Effect of Colchicine on Thymidine Uptake
  • Series Title: BNL (Series)
  • Series Title: Brookhaven National Laboratory Reports
  • Added Title: Brookhaven National Laboratory Report BNL-7317

Description

Treatment of Pisum root meristems with nutrient solutions containing tritiated thymidine (H3-T) and colchicine simultaneously labeled cells in two different segments of the mitotic cycle. Tracings of the serial progression of these differently labeled cells through mitosis resembled sine-cosine curves. When the labeled cells are in interphase the sign of the curves is negative, when they are in mitosis the sign is positive. The concept of the mitotic cycle in terms of trigonometric functions was presented as one way of transferring cycle from a celestial time scale to that of a biological clock.

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Digitized from microopaque cards (2).

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  • October 14, 1963

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  • Feb. 5, 2022, 9:58 a.m.

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Thumbnail image of item number 1 in: 'The Simultaneous Labeling of Cells in Different Segments of the Mitotic Cycle with Tritiated Thymidine and Colchicine and the Effect of Colchicine on Thymidine Uptake'.
Thumbnail image of item number 2 in: 'The Simultaneous Labeling of Cells in Different Segments of the Mitotic Cycle with Tritiated Thymidine and Colchicine and the Effect of Colchicine on Thymidine Uptake'.
Thumbnail image of item number 3 in: 'The Simultaneous Labeling of Cells in Different Segments of the Mitotic Cycle with Tritiated Thymidine and Colchicine and the Effect of Colchicine on Thymidine Uptake'.
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Van't Hof, J. & Ying, Huei-Kuen. The Simultaneous Labeling of Cells in Different Segments of the Mitotic Cycle with Tritiated Thymidine and Colchicine and the Effect of Colchicine on Thymidine Uptake, report, October 14, 1963; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc1255890/: accessed April 14, 2026), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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