Protists and disease : vegetable protists: algae and fungi, including Chytridiineae, various Plassomyxinae, the causes of molluscum contagiosum, smallpox, syphilis, cancer, and hydrophobia together with the Mycetozoa and allied groups / by J. Jackson Clarke.

  • Clarke, J. Jackson (James Jackson), 1860-1940.
Date:
1922
Catalogue details

Licence: In copyright

Credit: Protists and disease : vegetable protists: algae and fungi, including Chytridiineae, various Plassomyxinae, the causes of molluscum contagiosum, smallpox, syphilis, cancer, and hydrophobia together with the Mycetozoa and allied groups / by J. Jackson Clarke. Source: Wellcome Collection.

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    In mitosis spindles are formed by re-arrangement of linin fibres. Spindles are usually formed inside, but some¬ times outside the nuclear membrane. The substance that separates two nuclei after mitosis comes from the linin spindle. In the following pages where my own observations are referred to and it is not otherwise stated, cells, plasmodia, or tissues were stained with acid haematoxylin after fixation by Foa’s solution: see note at the end of this book. With this stain pure chromatin is of a deep blue colour. Ehrlich divided dyes into basic and acid according as the colouring matter plays the part of an acid or a base the compound employed (Wilson). Ehrlich’s statement only applies to cover-glass preparations dried and fixed by heat without the use of reagents (Lee’s u Microtomist’s Vade Mecum ”). Heidenhain termed the chromatin of Flemming “ basi- chromatin ” to distinguish it from nucleoli, cytoplasm, and other parts of cells which take acid dyes, such as acid fuchsin and eosin. He concluded that basichromatin is rich in nucleic acid, which Bayliss defines as a compound of phosphoric acid with a 5-carbon sugar and a purine derivative. The staining reactions of nuclei of the same organism may vary : thus Barrett found in the chytridian Olpidiopsis Saprolegniae that after the gonoplasm has passed into the oogonium the nuclei in the resulting oospore stained more deeply with safranine than they did before fertilisation.