. The botanical magazine = Shokubutsugaku zasshi. Plants; Botany. 72 THE BOTANICAL MAGAZINE. [Vol. Fig. 2. Curve showing the velocity of decomposition of antliocyanin by oxidase. Abscissae, time in minutes; ordinates concentration of aiithocyanin (intensity of colour). decolourization is inversely • propor- t ional to the strenght of the en- zyme solution to be added to the equal amount of hydro- gen peroxide, and to the c o ncentration of hydrogen per- oxide to be added to the equal amount of the plant juice of the same strength. Catalase is also pre- sent in the juice, hence a portion
. The botanical magazine = Shokubutsugaku zasshi. Plants; Botany. 72 THE BOTANICAL MAGAZINE. [Vol. Fig. 2. Curve showing the velocity of decomposition of antliocyanin by oxidase. Abscissae, time in minutes; ordinates concentration of aiithocyanin (intensity of colour). decolourization is inversely • propor- t ional to the strenght of the en- zyme solution to be added to the equal amount of hydro- gen peroxide, and to the c o ncentration of hydrogen per- oxide to be added to the equal amount of the plant juice of the same strength. Catalase is also pre- sent in the juice, hence a portion of oxygen is liberated in a gaseous state. To illustrate, the following observa- tion may be given: Table V. enzyme solution added cc. relative strength. HoOs (1:10) added cc. antliocyanin extract cc. intensity of colour (cone.) after 1hr. 2 1 2 0 2 2 0 2 1 2 26 2 78 1 2 45 2 Vl6 1 2 82 control (3 CC water) 2 100 As has already been mentioned, the decolourizing activity of hydrogen peroxide and potassium permaiignate is iiiihampered by the presence of acid or alkali. A strongly acidified aiitho-. 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 Tokyo Shokubutsu Gakkai; Nihon Shokubutsu Gakkai. Tokyo : Tokyo Botanical Society
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Keywords: ., bookcentury1800, booksubjectbotany, booksubjectplants, bookyear18
