The Lecithans Their Function in the Life of the Cell
The Lecithans Their Function in the Life of the Cell
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^^ emul. + 5 c. C. Glucose concentrated solution + 5 c. C. Zr^ Ca(N03)2 Ppt. Formed slowly Ppt. Settled We may conclude, then, that the precipitation of lecithin by divalent kations is a physical phenomenon probably of an electrical nature, because: 1. Non-electrolytes do not prevent the precipitation (I, VIII, IX).
2. The trivalent kation Fe'" is much more efficient in preventing the precipita- tion than a monovalent one like Na (II, VII).
3. The precipitate is formed independent of the concen...tration of the lecithin and can be redissolved by the addition of water.
The application of these observations to Loeb's results must be postponed until other lecithans have been more carefully studied.
CHEMICAL PROPERTIES The chemical properties of the lecithans depend on two groups in the molecule: first, the fatty acids, and, second, the complex of which the nitrogen is a part. The phosphoric acid, although the nucleus and very important in the building up of the molecule, does not seem to enter into any reaction, except on the complete destruction of the lecithan ; as Halliburton^ has found the phosphorus to decrease in degenerating nerves only after the eighth day.
What to read after The Lecithans Their Function in the Life of the Cell?
You can find similar books in the "Read Also" column, or choose other free books by Waldemar Koch to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
^^ emul. + 5 c. C. Glucose concentrated solution + 5 c. C. Zr^ Ca(N03)2 Ppt. Formed slowly Ppt. Settled We may conclude, then, that the precipitation of lecithin by divalent kations is a physical phenomenon probably of an electrical nature, because: 1. Non-electrolytes do not prevent the precipitation (I, VIII, IX).
2. The trivalent kation Fe'" is much more efficient in preventing the precipita- tion than a monovalent one like Na (II, VII).
3. The precipitate is formed independent of the concen...tration of the lecithin and can be redissolved by the addition of water.
The application of these observations to Loeb's results must be postponed until other lecithans have been more carefully studied.
CHEMICAL PROPERTIES The chemical properties of the lecithans depend on two groups in the molecule: first, the fatty acids, and, second, the complex of which the nitrogen is a part. The phosphoric acid, although the nucleus and very important in the building up of the molecule, does not seem to enter into any reaction, except on the complete destruction of the lecithan ; as Halliburton^ has found the phosphorus to decrease in degenerating nerves only after the eighth day.
What to read after The Lecithans Their Function in the Life of the Cell?
You can find similar books in the "Read Also" column, or choose other free books by Waldemar Koch to read onlineMoreLess
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