硅胶

Keywords: diketoreductase,isomeride,separation and purification,statins chiral side-chain expression, photoaffinity labeling probe

通过DEAE-Sepharose离子交换柱及Sephadex分子筛柱纯化后，酶的纯度达到电泳纯，并通过正相硅胶柱和反相C-18柱分离纯化其反应产物。

The purity of isoquercitrin was isolated with a silica gel column .

酶反应产物用硅胶柱层析法提取，可以得到高纯度的异槲皮甙。

Woodson or apocynum venetum Linn as raw material, it utilizes the method of decoction and alcohol sedimentation to remove impurity. After extract is separated by macroporous adsorptive resins, then use polydextran gel LH-20 to purify, obtain isoquercitrin. Compared with the method of traditional silica gel column chromatography, this method has characteristics such as: experiment period is short, dissipation of organic dissolvent is little, yield of produced product is high, and purity coefficient is fine and so on. Isoquercitrin produced by this invention can be provided for medicine research or used as chemistry control article.

Woodson或罗布麻的叶为原料，采用水提醇沉除杂的方法，提取液经大孔吸附树脂分离后再用葡聚糖凝胶LH-20纯化得罗布麻甲素，此法与传统硅胶柱层析的方法相比，具有实验周期短，有机溶媒消耗少，制得的产品得率高和纯度好的特点，本法制得的罗布麻甲素可供药物研究或化学对照品使用。

Methods:The green peel of Juglans Mandshurica were extracted by 95% ethanol and then separated and purified by silica gel column chromatography and gel column chromatography.

核桃楸青果皮，用95%乙醇提取，然后用硅胶柱色谱、凝胶柱色谱进行分离纯化。

Silicasulfuric acid was used as the catalyst for synthesis of Cyclohexanone 1, 2-propylene ketal from cyclohexanone and 1, 2-propylene glycol. The effect of catalyst dosage, molar ratio and reflux time to reaction were investigated.

以磺化硅胶为催化剂，以环己酮和1，2-丙二醇为原料合成环己酮1，2-丙二醇缩酮，考察了催化剂的用量、原料配比和回流时间对反应的影响。

But because of the exiting of much stress contained in the dry silicon gel, the membrane would be much crack in the process of calcinations. As a result, the Knudsen contribution to the total flux for N2 was about 70% and 85% for A and B tube, respectively.

但是在焙烧过程中由于干硅胶和MCM-48膜的应力释放而产生较多裂纹，导致在膜对N2的总渗透通量中努森扩散只占到70%和85.7%。

In this dissertation, the chemical constituents of the red algae Laurencia cartilaginea and Laurencia majuscula collected from the South China Sea of the Xisha Islands were studied, and 12 compounds were isolated by combination of extraction and separation and identified by various kinds of spectrum.

本论文主要采用硅胶柱层析、RPC—18反相柱、Sephdex LH—20、薄层层析及重结晶等方法，对采自中国南海西沙群岛的软骨凹顶藻Laurencia cartilaginea和略大凹顶藻Laurencia majuscula的化学成分进行研究，共得到12种化合物，并运用各种波谱手段对得到的化合物进行了结构鉴定。

The fractions of Ligroine and chloroform part of the the EtOH extraction were isolated and purified by column chromatography on silica gel and Sephadex LH 20 and recrystallization. Their structures were studied by using UV, IR, H-NMR, 13C-NMR, and MS, techniques.

运用硅胶、Sephadex LH-20柱色谱等方法对芫花乙醇提取物的石油醚及氯仿萃取部分进行化学成分研究，并利用UV、IR、1HNMR、13CNMR、MS等光谱技术鉴定其化学结构。

Objective: To establish a method of column chromatography with silica gel for the separation of ligustilide in the essential oil of Ligusticum chuanxiong Hort..

目的：建立硅胶柱层析法分离川芎挥发油中的藁本内酯。

Furthermore,The results show that alumina is more suitable for the separation of ethyl linolenate than the widely used silica gel, and the supercritical fluids is a good solvent than organic solvent because of its adjustability by changing the extraction conditions.

研究结果表明，超临界流体分离效果优于石油醚和正己烷等有机溶剂，氧化铝载体分离效果优于硅胶，超临界流体结合硝酸银吸附柱分离亚麻酸乙酯具有较好的效果，可得到纯度约95%的亚麻酸乙酯，其工业应用前景诱人。

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。