TO RETAIN, practice. To engage the services of an attorney or counsellor to manage a cause, at which time it is usual to give him a fee, called the retaining fee. The act by which the attorney is authorized to act in the case is called a retainer.
One explanation for the difference in the levels of catechins found in this study and others is the type of samples used. In comparative studies, leaves of Camellia sinensis 4 Discussion Table 1. Levels of catechins and caffeine in tea bags, extract, and ready-to-drink green tea.
There are perhaps as many as 250 species of Camellia, all native to eastern Asia, but only a small handful of these are important economically or horticulturally. Most important economically is Camellia sinensis, the leaves of which are the source of tea.