1·Persimmon contains a certain number of single Ning ( tannic acid ), a higher content of persimmon skin, mouth, tongue hemp astringent to eat persimmons are single Ning convergence.
柿子中含有一定数目的单宁（鞣酸），柿皮含量更高，吃柿子时口涩、舌麻就是单宁收敛的缘故。
2·Tannic acid and pregnant women may be iron in food can not be combined into a complex organism absorbed.
鞣酸可与孕妇食物中的铁元素结合成为一种不能被机体吸收的复合物。
3·Employing the suspension cultural method, tannic acid and related compounds at non inhibitory and inhibitory concentrations against 2 NF, 4 NQO, MNNG had shown no significant antimutagenic effect.
应用悬浮培养方法，鞣酸和相关化合物在无抑制浓度和抑制浓度对2 NF、4 NQO和MNNG无抗突变作用。
4·The deviating rate of tannic acid is 48.8%.
用标准曲线法定量计算鞣酸的脱出率为48．8%。
5·Tieguanyin contains tannic acid, can reduce enterogastric peristalsis, affect human body to absorb, aggravating anemia drinking, and contain of oxalic acid, can make stone increase.
铁观音中含有的鞣酸，会减少肠胃蠕动，影响人体对铁观音的吸收，加重贫血，而且含有的草酸，会使结石增多。