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Several products in addition to those previously discussed have been generated from neem. Among them are the following examples.
Resin An exudate can be "tapped" from the trunk by wounding the bark. This high-protein material is not a substitute for polysaccharide gums, such as gum arabic. It may, however, have a potential as a food additive, and it is widely used in South Asia as "neem glue." 8
Bark Neem bark contains 14 percent tannins, an amount similar to that in conventional tannin-yielding trees (such as Acacia decurrens). Moreover, it yields a strong, coarse fiber commonly woven into ropes in the villages of India.
Honey In parts of Asia neem honey commands premium prices, and people promote apiculture by planting neem trees.
Food There are odd reports of people eating neem. Leaf teas may be harmful, especially if drunk in quantity over a long period, but it is said that Mahatma Gandhi, who had a hearty respect for the nutritive value of greens, commonly prepared a neem-leaf chutney and ate it with gusto—despite its incredibly bitter taste. Recently, the discovery of a rare neem tree with "sweet" leaves has been reported. 9
Fruit Pulp Pericarp represents about half the weight of neem fruits, and when they are processed to obtain the seeds, large quantities of pulp are also produced. This neem-fruit pulp is a promising substrate for generating methane gas, and it may also serve as a carbohydrate-rich base for other industrial fermentations.10
Anderson and Hendrie, 1971; Anderson et al.. 1972.