Notes on the chromatology of Anthea cereus / by C.A. Mac Munn.

  • MacMunn, Charles Alexander, 1852-1911.
Date:
1887
Catalogue details

Licence: Public Domain Mark

Credit: Notes on the chromatology of Anthea cereus / by C.A. Mac Munn. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    bisulphide gave a band in the green; such a solution was evaporated to dryness, and the residue tested by the lipo- chrorae tests. With iodine and iodide of potassium it re- mained unchanged, with nitric acid it gave a transient blue, with sulphuric acid a green and blue; hence it is a lipochrome. A second absolute alcohol extract having been made from the tentacles only was of a greenish-yellow colour with a red fluorescence, and gave the following bands : 1st band . . . \ 681-5 to \ 650 (dark part = X 678 to X 653). 2nd „ ... X 636 to X 601. 3rd „ ... X 593 to X 573. (See Sp. 10.) In a thin layer there may have been some shading between green and blue, and perhaps some in violet. To this solution water was added, and it was then agitated with carbon bisul- phide. On separating the latter it was greenish, leaving the alcohol yellow, and in both these solutions certain bands in the violet could now be seen, which were not visible in the original alcohol solution (before separation). I have tried to show all the bands in sp. 11 and 12. These read as follows: 1st band . . . X 686 to X 656. 2nd „ . . X 644 to X 612 5. 3rd „ . . \ 599 to X 575. 4th „ . . (a shading before the next). 5th „ . X 523 to X 496. 6th „ . . . X 479 to X 460. 7th „ . . . X 453 to X 436. Now, on comparing these bands with the bisulphide extract from the first alcohol extract of the tentacles, they are found to be practically almost the same. The yellow alcohol solution from which the bisulphide had removed the pigment giving these bands, no longer contained any chlorofucin, and showed hardly a trace of a band in red in a deep layer. It did show the shadow of a band in green, and perhaps another in the violet. If we compare a second absolute alcohol extract of the parts of A nth ea free from tentacles with the second absolute extract of the tentacles, we find that no great difference exists between