羟基酮

The hydroxyl groups can be changed into esters,ethers,acetals and ketals,etc.

最常用的羟基保护基主要有三大类：酯类、醚类和缩醛或缩酮类。

The total energy of 8-hydroxyquinoline was lower than that of quinolin-8(1 H )-one, whereas the order was reversed in dimers.

通过能量比较，8-羟基喹啉比喹啉-8(1H)-酮要低，但是在二聚体却恰恰相反。

Two approaches for the asymmetric syntheses of naturally occuring eudesmane-type triol kudtriol and 5-epi-kudtriol as well as their C-11 epimers were achieved starting from-dihydrocarvone through six and seven steps, respectively.

以-二氢香芹酮为原料，用两条合成路线分别经六、七步反应完成了三羟基桉烷类天然产物Kudtriol、5-epi-Kudtriol及它们的C-11位差向异构体的不对称全合成。

Objective To observed the effects of 5 hydroxyl group of genistein on recombinant human protein kinase CK2 holoenzyme activity.

目的观察染料木黄酮C5位上的羟基对其抑制重组人蛋白激酶CK2全酶活性的影响。

Adopting compound techniques of inorganic nanometer, sol-gel techniques and ultraviolet absorbers are used to obtain new protective materials of hydroxybenoic ketone, benzotriazole and polyvinyl alcohol for the protection of historical relics .

采用无机纳米复合技术，利用溶胶-凝胶方法的分配交联和紫外线吸收剂的添加等工艺手段，筛选出适于文物保护环境的防紫外线照射，又不影响文物展示效果的羟基苯酮类、苯并三唑类及能有效消除弦光，又不影响观赏效果的聚乙烯醇类新型防护材料，以便用以不同环境下的文物保护工作。

Polyols can be divided into latex polyol and dispersion polyolaccording to the way of preparation. In this paper, acrylic latex polyol and acrylic dispersionpolyol were synthesized respectively. One kind waterborne polyisocyanate, which was waterbornehexamethylenediisocyanate trimer, was obtained by hydrophilic modification. Andisophorone diisocyanate trimer (T1890E), which can formulate into 2K-WPU coatings withpolyols, was selected from the unmodified polyisocyanates.

本文合成了两种羟基组分：丙烯酸乳胶多元醇和丙烯酸分散体多元醇，亲水改性得到了一种水性多异氰酸酯组分：水性六亚甲基二异氰酸酯三聚体，同时在未改性的多异氰酸酯组分中遴选了一种多异氰酸酯：异佛尔酮二异氰酸酯三聚体(T1890E)，可用来组成双组分水性聚氨酯涂料。

Both chemicals are toxic to medaka, in particular zpt, which also causes teratogenic effects such as spinal cord deformities in embryos at very low, sublethal concentrations.

所有化学物质对于青鳉来说都是有毒的，特别是锌羟基吡啶硫酮，这造成了青鳉的畸形，很低的亚致死的药量都会造成晶胚发育中脊椎的残缺。

Biological effects of the biocide zinc pyrithione, used in anti-dandruff shampoos and antifouling paints and the agricultural insecticide imidacloprid on japanese medaka fish were assessed in experimental rice fields.

用在抗头皮屑的洗发水和防污油漆以及专门用于日本青鳉的农业杀虫剂的有效成分锌羟基吡啶硫酮的生态影响在的水稻实验田接受评估。

The other actives of ten target products will be further studied in future.

这是我们对异黄酮及其衍生物清除羟基自由基认识的一个重要发展。10种目标产物其他活性有待进一步研究。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。