查询词典 silica gel

The samples were extracted with acetone by blending and the extract was partitioned with methenyl chloride. The extracts were cleaned up by a column of silica gel.

样品以丙酮提取，三氯甲烷萃取，硅胶柱净化，液相色谱测定，最小检出量为0 5×10-9g。

Silica gel column and reversed-phase C-18 column were employed to purify and separate monohydroxy intermediates.

此外，对DKR催化双羰基底物还原得到的3R，5S-双羟基产物进行纯化，再通过羟基保护和保护基的去除，以用于他汀类药物的手性侧链制备。

The multidentate amine modified silica gel is good catalytic ligand of ATRA reaction.

且此种多齿胺改性硅胶配体是ATRA反应很好的配体。

Through ethanol deposition, organic solvent extraction, then active carbon, 732 positive ion-exchange resin and silica gel columniation chromatography, cream nematocide substance have been obtained. Inspection the substance by TLC, UV-Visible Spectrophotometer have been deduced singleness component, and it's pure 97.38% by HPLC. The substance could use for structure analysis and character identify.

活性物通过无水乙醇沉淀，有机溶剂萃取，活性炭柱、732型阳离子交换树脂柱及硅胶柱层析后，经硅胶薄层层析、紫外－可见光检测和高效液相色谱检测，其纯度达97.38%，可用于物质进一步结构分析及性质测定。

In this paper, adopted augmenting culture in nitrite bacteria culture media and the method of silica gel plate isolation,31 strains of bacteria were isolated from vegetable garden soil of our school. The color reaction test was carried out with Griess reagent and culture fluid, which was regarded as the index to determine producing NO2- or not. 13 strains which color were deep were obtained and they were further rescreened by doing nitrite test. A strain N4(coded N4,the same to the following)with higher rate of nitrosification was picked up after rescreened; A strain B08( coded B08 ,the same to the following) with higher rate of denitrification was obtained after isolated and rejuvenated from our lab conserving mixed denitrifying bacteria culture.

本研究采用亚硝化细菌富集培养基选择培养和硅胶平板分离法，从本校农场菜园土中分离到31株细菌，以格利斯试剂对培养液的反应颜色深浅作为指标衡量其产NO_2~-的多少，经初筛从分离株中筛选出13株格利斯试剂反应颜色较深的菌株，再对这13株菌作亚硝化试验，最终选出一株亚硝化速率较高的菌株(编号为N_4，下同)；另外，通过对本实验室保存的反硝化细菌混合菌液进行分离复壮，筛选出一株反硝化速率高的菌株编号为B_

This product is a nutrimental food, used spirulina drier powder,silica gel powder as its principal ingredient, it has the function of boosting up immunity after the functional test.

本品是以螺旋藻干粉、微粉硅胶为主要原料制成的保健食品，经动物功能试验证明，具有增强免疫力的保健功能。

Alidase was prepared by coupling silica-gel spheres already carrying γ-aminopropyltriethoxy-silane with glutaraldehyde, and then with N-(p-aminophenyl) oxamic acid.

将γ氦丙基三乙氧基硅烷取代的微球硅胶先后与戊二醛，对氨基苯草氨酸结合，制成了一种新的吸附剂，用于唾液酸酶的亲和提纯。

A white needle crystal was isolated and purified on systematic extraction of the alkaloid by silica gel column and gradient sublimation from Oxytropis glabra.

摘要采用生物堿系统提取、矽胶柱层析分离及梯度升华技术从小花棘豆干草粉中分离出一种白色针状结晶。

Methods Cyclohexane, ethyl acetate and glacial acetic acid (8∶8∶0.8) were used as the developing solvent. Samples were analyzed on a layer plate of silica gel G thin by using 20% phosphomolybdic acid as chromogenic agent.

以环己烷乙酸乙酯冰醋酸（体积比8∶8∶0.8）为展开剂，以羧甲基纤维素钠为黏合剂自制硅胶G薄层板，20％磷钼酸溶液为显色剂，进行薄层色谱分析。

Even carbon number alkenes, phthalic esters and nitrogen heteroatom-containing components were detected in the elution fractions, while such components were not detected without silica gel column separation, indicating that preseparation is very important for increasing the sensitivity of GC/MS analysis.

各洗脱馏分用GC/MS分析，其可测成分与直接检测相比，多检测出偶碳烯烃、邻苯二甲酸酯类和含氮化合物等，表明合适的预分离对提高GC/MS分析的灵敏度非常重要。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。