1·A modified cationic polyhydroxy compound gelling fluid as water shutoff is developed. This type of gel has better selectivity. Its field tests are described and the results are satisfactory.
介绍了一种利用阳离子化改性多羟基化合物进行堵水调剖的方法，具有一定的选择性，在油田应用取得了良好效果。
2·The enzymatic activity of tryptophan synthase was enhanced by adding polyhydroxy compounds.
色氨酸合成酶的酶的活性增强，加入多羟基化合物。