An Introduction to the Chemistry of Plant Products
An Introduction to the Chemistry of Plant Products
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In our eReader you can find the full English version of the book. Read An Introduction to the Chemistry of Plant Products Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book An Introduction to the Chemistry of Plant Products
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Group 2.
Ferric salts. Blue colour and precipi- Green colour and pre- tate. Cipitate.
Lime water. White precipitate be- Light pink precipitate coming blue. Becoming red and brown. Bromine water. No precipitate. Yellow precipitate be- coming brown.
Dekker * proposes the following classification : — 1. Catechin tannins, occurring in gambier, catechu and Hainanielis bark.
2. True tannins — (a) Gallic acid group . . . Gallotannic acid ; tea and sumach tannins. {h) Ellagic acid group . . . Divi-divi..., algarobilla and myrobalan tannins. (c) Oak bark group . . . The majority of red-producing tannins.
3. Pseudotannins (which do not form leather with hide), caffetannic acid and the tannins of mat6, hops, etc.
Perhaps the best classification is the one given by Procter, -[■ who divides tannins into two main groups : — (A) Pyrogallol tannins, including divi-divi, galls, sumach, myrobalans, valonia, algarobilla, oak gall, oak wood and chest- nut tannins.
These tannins have the following characteristics : — 1 .
What to read after An Introduction to the Chemistry of Plant Products?
You can find similar books in the "Read Also" column, or choose other free books by Paul Haas to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Group 2.
Ferric salts. Blue colour and precipi- Green colour and pre- tate. Cipitate.
Lime water. White precipitate be- Light pink precipitate coming blue. Becoming red and brown. Bromine water. No precipitate. Yellow precipitate be- coming brown.
Dekker * proposes the following classification : — 1. Catechin tannins, occurring in gambier, catechu and Hainanielis bark.
2. True tannins — (a) Gallic acid group . . . Gallotannic acid ; tea and sumach tannins. {h) Ellagic acid group . . . Divi-divi..., algarobilla and myrobalan tannins. (c) Oak bark group . . . The majority of red-producing tannins.
3. Pseudotannins (which do not form leather with hide), caffetannic acid and the tannins of mat6, hops, etc.
Perhaps the best classification is the one given by Procter, -[■ who divides tannins into two main groups : — (A) Pyrogallol tannins, including divi-divi, galls, sumach, myrobalans, valonia, algarobilla, oak gall, oak wood and chest- nut tannins.
These tannins have the following characteristics : — 1 .
What to read after An Introduction to the Chemistry of Plant Products?
You can find similar books in the "Read Also" column, or choose other free books by Paul Haas to read onlineMoreLess
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