Tannins growth

Tamir, M., and Alumot, E., 1970, Carob tannins growth depression and levels of insoluble nitrogen in the digestive tract of rats, J. Nutr., 100 573. 

The quantity and organization of the mucosa are critical determinants of GIT functions. Feeding chicks and rats diets with tannins causes mucosal atrophy and villus shortening, with liver damage, and decreases growth and survival... 

ORTIZ L T, ALZUETA c, TREVINO J, CASTANO M (1994) Effects of faba bean tannins on the growth and histological strncture of the intestinal tract and liver of chicks and rats. Br Poult Sci. 35 743-54. 

The flavonoid quercetin suppresses growth somewhat in prairie voles, M. ochrogaster, while tannic acid, a hydrolyzable tannin, has an even stronger effect (Lindroth and Batzli, 1984). Quercetin is toxic, but does not bind with protein and, therefore, does not affect protein digestibility. Tannic acid has some effect on protein digestibility but is also toxic. 

Another frequent observation in tannin-related feeding experiments is that of animal growth rate in relation to tannin consumption, as used by Feeny (1 ). It is important to realise that animls may grow less well on a tannin-containing diet because (i)... 

In the case of the winter moth, tannins may very well reduce assimilation by complexlng with dietary proteins. However, the assumption that this is how tannins inhibit growth in species other than the winter moth needs to be carefully re-examined. In the experiments cited above, mechanisms other than a reduction in assimilation appear to be operating. 

N.A. 3-O-P-D-glucuronide, mucilage, tannins, flavones.103117 Treat skin irritation and bums, infused flower for gargle for sore throat and laryngitis. It is anti-irritant and used as a mild sun screen, inhibiting microbial growth. 

Amount of Moisture in Woods.—A remarkable variation is observed at stated seasons, in the quantity of soluble matter—sap—which is present in all kinds of woods thus, in spring, when the tree is in active growth, the amount of water, et cetera, is much greater than at the close of autnmn, or the middle of winter, when it is in a kind of normal state. The practical benefit of this knowledge is, that trees, whether intended for fuel or timber, are, or should be, felled in the latter seasons although, when they are cultivated for the principle of the sap, such as tannin, quinin, et cetera, it is more advantageous to ent them when the flow is at its full. 

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