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1·The levels of serum zinc, prealbumin (PAB) and 19 free amino acids were deter - mined in 197 preschool children.

检测197例学龄前儿童血锌、前白蛋白(PAB)及血浆中19种游离氨基酸水平。

2·Objective: to observe the changes of serum prealbumin (PAB) and hyaluronic acid (ha) levels in patients of chronic bronchitis and to approach to the clinical values.

目的：观察慢性支气管炎患者血清前白蛋白(pab)和透明质酸(HA)水平变化并探讨其临床意义。

3·This paper introduces the definition of PAB-net, describes its physical representation, gives an algorithm and its analysis on listing all minimal frames of PAB-net.

介绍PAB-网的定义、物理表示和列举其全部极小框的算法及其分析。