4.操作条件下的稳定性固定化生物材料的一个重要参数是它在操作条件下的稳定性(图10),这与存放条件下的稳定性不同。操作条件下的稳定性一般以半衰期表示。表3是活性下降最常见的原因。有时因洗下了结合得较弱的生物材料而使活性下降,也可因原料中某一成份而使之活化。 Pitcher强调,必须在尽可能接近实际的条件下检查其稳定性。半衰期应为2～100天以上(固定化乳糖酶)。 4. Stability Under Operating Conditions An important parameter of immobilized biomaterials is its stability under operating conditions (Figure 10), which is different from the stability under storage conditions. The stability under operating conditions is generally expressed in terms of half-life. Table 3 is the most common cause of activity decline. In some cases, the activity is decreased by washing the biomaterial that is weakened, or it can be activated by a certain component in the raw material. Pitcher emphasizes that stability must be checked as close as practical. Half-life should be 2 to 100 days (immobilized lactase).