Carotin; the Principal Natural Yellow Pigment of Milk Fat; Chemical And Physiological Relations of Pigments of Milk Fat to the Carotin And Xanthophylls of Green Plants
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Palmer and C. H. Eckles For a number of years the great variety of yellow animal pig- ments have been classified under the general name lipochrome. Recent investigations by Willstatter and Escher,i and by Escher ^ have shown, however, that some of these pigments are in reality very closely related or identical with the carotin or xanthophyll pigments of plants. Will- statter and Escher have analyzed the pure lutein of egg yolk and found it to be isomeric with the crystalline xanthophyll of gree...n plants ; and- Escher has identified in the same manner the lipochrome of the corpus luteum as a true carotin. The isolation of both pig- ments was attended with great difficulty. In the case of the egg yolk pigment the yolk of 6,000 hen eggs yielded only four grams of crude crystalline pigment, while in the case of the corpus luteum pigment less than 0.5 gram of crystals were obtained from 10,000 cows' ovaries.
The natural yellow pigment of butter is the most commonly ob- served of all animal lipochromes.
What to read after Carotin; the Principal Natural Yellow Pigment of Milk Fat; Chemical And Physiological Relations of Pigments of Milk Fat to the Carotin And Xanthophylls of Green Plants?
You can find similar books in the "Read Also" column, or choose other free books by Leroy Sheldon Palmer to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Palmer and C. H. Eckles For a number of years the great variety of yellow animal pig- ments have been classified under the general name lipochrome. Recent investigations by Willstatter and Escher,i and by Escher ^ have shown, however, that some of these pigments are in reality very closely related or identical with the carotin or xanthophyll pigments of plants. Will- statter and Escher have analyzed the pure lutein of egg yolk and found it to be isomeric with the crystalline xanthophyll of gree...n plants ; and- Escher has identified in the same manner the lipochrome of the corpus luteum as a true carotin. The isolation of both pig- ments was attended with great difficulty. In the case of the egg yolk pigment the yolk of 6,000 hen eggs yielded only four grams of crude crystalline pigment, while in the case of the corpus luteum pigment less than 0.5 gram of crystals were obtained from 10,000 cows' ovaries.
The natural yellow pigment of butter is the most commonly ob- served of all animal lipochromes.
What to read after Carotin; the Principal Natural Yellow Pigment of Milk Fat; Chemical And Physiological Relations of Pigments of Milk Fat to the Carotin And Xanthophylls of Green Plants?
You can find similar books in the "Read Also" column, or choose other free books by Leroy Sheldon Palmer to read onlineMoreLess
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