. Plant physiology. Plant physiology. Karotin Fig. 10.—Absorption spectra of carotin and lycopin. (After Escher.) The Fraunliofer lines^re indicated by the letters above and the wave-lengths (in 10 /ifi) are shown below; the thickness of layer employed is given (in mm.) at the left. Lycopin^ is closely related to carotin and has the same percentage formula (C40H66); it is found in the fruit of the tomato {Solanum lycopersicum). Three dark bands occur in the right half of its absorption spectrum (Fig. 10). Red algae contain phycoerythrin, a protein-like substance, which is readily soluble in wa
. Plant physiology. Plant physiology. Karotin Fig. 10.—Absorption spectra of carotin and lycopin. (After Escher.) The Fraunliofer lines^re indicated by the letters above and the wave-lengths (in 10 /ifi) are shown below; the thickness of layer employed is given (in mm.) at the left. Lycopin^ is closely related to carotin and has the same percentage formula (C40H66); it is found in the fruit of the tomato {Solanum lycopersicum). Three dark bands occur in the right half of its absorption spectrum (Fig. 10). Red algae contain phycoerythrin, a protein-like substance, which is readily soluble in water but insoluble in alcohol, ether, and carbon bisulphide. The. Pig. II.—Absorption spectra of carotin (above) anA xanthophyll (below). (.After Will- statter and Stall.) The Fraunhofer lines and the wave-lengths (in ju,i) are shown on the upper line of each diagram. ' Montanari, Carlo, Materia colorante rossa del pomodoro. Le Stazioni Sperimentali Agrarie Italiane 37: 909-919. 1904. [Willstatter, Richard, and Escher, Heinr. Ueber den FarbstoEE der Tomate. Zeitsch. physiol. Chem. 64: 47-61. 1910.] ' The absorption spectra of carotin and xantophyll, as given by Willstatter and Stoll (1913) [see note b, p. 6] are here reproduced as Fig. 11. It is questionable whether xanthophyll is actually formed by the oxidation of carotin.— Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Palladin, Vladimir Ivanovich, 1859-1922; Livingston, Burton Edward, 1875-; Hopping, Aleita, 1890-. Philadelphia, P. Blakiston's Son & Co
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