查询词典 menadione

Abstract］objective: to detect the reduction of rabbit nadp-dependent retinal reductaseon menadione, and to identify its reductive production.

目的：检测兔辅酶ⅱ依赖性视黄醛还原酶对维生素k3的催化活性并对该酶还原k3所生成的产物进行鉴定。

However,'pre-treatment of menadione followed by irradiation' only has the addition effect.

至於'先给予维生素K3再辐射照射'，除8 Gy外，其余都只有加成作用。

But the author found that there was another impurity in VK_1 and its amount was even larger than menadione in some samples of VK_1 and its amount will obviously increase when exposed to light.

在对维生素K_1的有关物质检查中发现，维生素K_1样品中除杂质甲萘醌外，还有一主要的未知杂质，且在光照的条件下，其量会明显增加。

It's required for VK_1 in the present compendial monographs that the content of menadione should be strict controlled and the other impurities are controlled as related substances using colorimetry or TLC method.

目前各国药典维生素K_1的质量标准中，都是采用比色法或TLC法检查甲萘醌，而其他的杂质则作为"有关物质"同时进行检查。

The fluorescence signal revealed by this process is specific and exhibited in the near red spectrum region with emission maxima at 595nm, and it could be competitively inhibited by menadione.

萤光分子所释放出来的长波长讯号(595nm)具有独特的识别性质并且靠近红外光之区域范围，而萤光分子的释放会被维他命K所抑制。

Results: The homogeneous enzyme was obtained on a single step by affinity chromatography from the supernatant of transformed cells, and its reductive activity of menadione was 18.6-fold of the supernatant of the empty-transformed cells and 7.3-fold of transformed cells.

结果：诱导表达后的细菌裂解上清液经一步亲和层析后得到单一酶蛋白，其对K3的比活性分别是原空白菌裂解上清液和经诱导表达后的菌裂解上清液的比活性的18.6和7.3倍。

Stable Vitamin K 3 is synthesized by addition reaction of raw materials of niacinamide, chlorhydric acid and menadione sodium bisulfite at 25℃.

以烟酰胺、盐酸为原料，在 2 5℃反应得烟酰胺盐酸盐溶液，而后与亚硫酸氢钠甲萘醌发生加成反应，反应的物料配比为：n ∶ n ∶ n =1∶1。

This arrangement was applied to the detection of water soluble vitamin K (menadione sodium bisulfite, MSB) to avoid the complex and time consuming derivatization procedure required for the UV and fluorescence detectors.

将其用于检测药物中的维生素K3，克服了紫外检测法和荧光检测法所必需的柱后衍生化反应及电化学还原检测中溶解氧、金属离子的干扰。

Center for Molecular Biology, Shantou University Medical College, Shantou 515041, China［Abstract］Objective: To detect the reduction of rabbit NADP-dependent retinal reductaseon menadione, and to identify its reductive production.

目的：检测兔辅酶Ⅱ依赖性视黄醛还原酶对维生素K3的催化活性并对该酶还原K3所生成的产物进行鉴定。

After combined treatment most surviving fractions were less than 15%. Conclusions: Both 'pre-irradiation followed by menadione' and 'concurrent treatment' have synergistic effect.

以游离辐射和维生素K3合并处理细胞时，以'先照射后给予维生素K3'或者'维生素K3存在的同时给予辐射照射'两种情况最好，具有协同杀伤癌细胞的作用。

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。