Sentence Examples

  • The value of oak bark depends upon the amount of tannin contained in it, which varies much, depending not only on the growth of the tree but on the care bestowed on the preparation of the bark itself, as it soon ferments and spoils by exposure to wet, while too much sun-heat is injurious.
  • Numerous other substances are also found in the cytoplasm, such as tannin, fats and oil, resins, mucilage, caoutchouc, guttapercha, sulphur and calcium oxalate crystals.
  • The bark and young cones afford a tanning material, inferior indeed to oakbark, and hardly equal to that of the larch, but of value in countries where substances more rich in tannin are not abundant.
  • The wood contains no tannin, and for this reason quassia, like chiretta and calumba, may be preserved with iron.
  • An astringent fluid, known as shibu, rich in tannin, is expressed from the green fruit and used in various industries.

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