查询词典 hydroxy-acetone

Pentanediol reacted with phosphorus tribromide to make it mono-bromination, under the catalytic action of PPTs it reacted with 2,3-dihydropyran to protect another hydroxy group, then to react with triphosphine, produced quarterphossal.

再以1，5-戊二醇为原料，三溴化磷使之单溴代，得到5-溴-1-戊醇，在对甲苯磺酸吡啶盐的催化下与2，3-二氢吡喃反应保护其另一端的羟基，与三苯基膦反应生成季磷盐。

Methods Tetra-calcium phosphate was prepared by high heating, than imitated the internal situation of humanbody, for hydrolization and solidation,to synthesize the hydroxy-calcium phosphate,as artificial bone in sement-type ,then im-planteted them into the large segmental defect of radius of New Silan rabbits model. The implanted materials were taken out at 4th, 8th, 12th, and 16th weeks after implantation. The histological sections, with HE and Masson's trichromic staining made, to evaluate the effectiveness of repair of bony defect.

方法高温法制备出磷酸四钙，然后在模拟体内环境下将其与无水磷酸氢钙发生水化固化反应，合成水泥型羟基磷灰石人工骨，将自制的CPC人工骨植入新西兰兔桡骨大段骨缺损模型中，术后4、8、12、16周取材，采用HE染色和Masson三色染色分析评价骨缺损修复效果。

The technology that synthesizing 3-chlorine-2-hydroxy propyl trimethyl ammonium chloride with ethanol as solvent is simple, the consumption is less than other methods, the solvent can be used many times, the quality of the product is stable.

以乙醇法合成3-氯－2-羟丙基三甲基氯化铵工艺简单，耗能较少，溶剂可循环使用，产品性能优良，使用效果好。

When feeding with undecylenic acid by fed-batch culture, there was a lag time when microorganism using undecylenic acid as a new carbon source. The molar fraction of unsaturated monomer could be achieved by 37.39% at 73 hr cultivation. We can see the property of PHA become flexible with cultivation time by the lower of Tg.

发酵槽馈加十一烯酸培养实验，产物为PHO与PHU(poly-3-hydroxy-8-noneneoate为主)所形成之混掺物，且双键所占比例随时间增加，培养第73小时可得到双键比例37.39%；随培养时间增加，玻璃转移温度(Tg， glass transition temperature)由-34.03℃下降至-42.40℃，显示PHA性质变得更加柔韧具有弹性。

The result showed that the contents of p hydroxy benzoic acid,vanillic acid(extracted by 1mol·L -1 NaOH) in continuous cropping soil were significant higher than that in normal cropping soil,and the content of vanillin had no significant difference in these soils.

结果表明，重茬土壤中对羟基苯甲酸和香草酸的含量(1mol·L-1NaOH提取)大于正茬土壤，且差异达到极显著水平，香草醛含量差异不显著；重茬大豆根系水提液中对羟基苯甲酸、香草酸、阿魏酸、香草醛、香豆素含量均高于正茬。

These compounds are able to be used as hydrophilic chain-extenders in the synthesis of zwitterionic polyurethane ionomers for the existence of hydroxy groups.

这些化合物可以作为两性离子型聚氨酯离聚物的扩链剂使用。

A simple method was developed for the analysis of 6-hydroxy-1-methyl-1,2,3,4-tetrahydro-β-carboline (6-OH-MTHβC), 5-hydroxytryptamine (5-HT) and 5-hydroxyindole acetic acid (5-HIAA) in rat brain by high performance liquid chromatography with electrochemical detection.

建立了大鼠脑组织中6-羟基－1-甲基－1，2，3，4-四氢－β-咔啉(6-OH-MTHβC)、5-羟色胺(5-HT)和5-羟吲哚乙酸(5-HIAA)含量的高效液相色谱-库仑阵列电化学检测方法。

The experiment take the normal butyl alcohol as the dispersion medium, first comes to anchor using Biological glassthe effect in the negative pole Ti6Al4V deposition BG, then causes the hydroxy apatite to deposit in the BG coating, then passes through agglutinates obtains the contact surface union intensity better biological activity gradient ceramics coating.

实验以正丁醇为分散介质，先利用生物玻璃的抛锚效应在阴极的Ti6Al4V沉积上BG，然后使羟基磷灰石在BG的涂层上在沉积，再经烧结获得界面结合强度较好的生物活性梯度陶瓷涂层。

The optimum technical parameters were obtained as follows:bromating temperature is 15℃,solvent is methyl arcohol, bromating agent is BrCl,the molar ratio of 4-hydroxy-benzaldehyde to BrCl is 1:1.15,reaction time is 2.5 hours.

其工艺参数优化如下：溴化时反应温度选择15℃，溶剂选择甲醇+乙酸甲酯，溴化剂选择氯化溴，对羟基苯甲醛与氯化溴之比为1∶1.15，反应时间选择2.5个小时，滴溴时间约半个小时。

Botanicals and minerals are added to help heal and calm the skin, while a 5% hydroxy acid blend gently exfoliates.

比较温和，一点刺激感也没有。赞的是温和有效的去除角质，清洗完后会觉得皮肤表面光滑柔软。

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。