丙二醇

The activities of glycerol dehydrogenase and 1,3-PD oxidoreductase were also studied, and it was found that the activity of GDHt was enhanced, but the mutation had little influence on the activity of PDOR.

同时测定了诱变前后还原途径中甘油脱水酶和1，3-丙二醇氧化还原酶的酶活变化，研究表明诱变对GDHt有明显的促进作用，而对PDOR的影响不明显。

Propanediol oxidoreductase is the key enzyme in converting glycerol to 1,3-propanediol.

1，3-丙二醇氧化还原酶是以甘油为底物生产1，3-PD途径中的关键酶之一。

As to 1,3-propanediol oxidoreductase, the Km value for NAD and 1,3-propanediol are 0.15 ±10-3 M and 0.97±10-3 M respectively.

最后，本文考察了甘油脱氢酶和1，3—丙二醇氧化酶的动力学性质。

No mineral oil, petrolatum or propylene glycol

不含矿物油，凡士林或丙二醇

Objective To investigate the changes of cerebral ultramicrostructure and contents of superoxide dismutase, malondialdehyde and xanthine oxidase, and protective effect of safflor injection in chronic hypoxia-hypercapnia rats.

目的：探讨慢性低氧高二氧化碳大鼠大脑超微结构、超氧化物歧化酶、丙二醇与黄嘌呤氧化酶含量的变化，及红花注射液的保护作用。

Bull; Suitable for use with dry dermatological conditions such dry, scaly skin, winter itch, ichthyosis, xerosis, dermatitis.

本产品采用低刺激的配方，及不含羊毛脂，香芬，色素、丙二醇等成分，所以适合大多数的敏感性皮肤使用。

Acetalization of Benzaldehyde with 1,2 Propanediol over Dealuminated USY

脱铝超稳Y沸石催化苯甲醛与1，2-丙二醇的缩醛化反应

_6P_2W_(17)VO_(62) catalyst was prepared and characterized by FTIR,and synthesis of fraistone over as-synthesized catalyst from ethyl acetoacetate and 1,2-propylene glycol was investigated.

制备了Dawson型磷钨钒酸铵催化剂，用FT-IR分析方法对催化剂进行了结构表征，并以乙酰乙酸乙酯与1，2-丙二醇为原料催化合成了苹果酯-B。

Supported 12-Phosphotungstic Acid and Its Salts as Catalysts for the Synthesis of Fructone and Fructone-B;2. Their catalytic activities were measured by synthesis of fructone-B from ethyl acetoacetate and 1,2-propanediol.

制备了一系列以脱铝超稳Y沸石为载体的磷钨酸及其铯盐催化剂，考察了催化剂在以乙酰乙酸乙酯和1，2-丙二醇为原料催化合成草莓酯反应过程中的性能。

Pyruvaldehyde was synthesized with acetone or 1,2 propanediol as starting material respectively.With n∶n=1 00∶0 79,3 0-4 0 g potassium chlorate as catalyst,and water and glacial acetic acid as solvent,refluxing on water bath of 60-75 ℃ for 4 h,bromoacetone was obtained in 63 5% yield.

分别用丙酮和 1，2 丙二醇做原料合成了丙酮醛。n∶n =1 0 0∶0 79，加入 3 0～4 0g氯酸钾做催化剂，水和冰醋酸做溶剂，水浴温度为 6 0～ 75℃，回流 4h ，制得产率为 6 3 5 %的溴丙酮。V∶V =11 9∶1 0 ，通入空气，在 6 5～ 70℃反应 5～ 8h ，制得产率为 5 9 6 %的丙酮醛。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。