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- Twenty-one compounds were obtained from the chloroform and ethyl acetate extraction through repeated silica gel colum chromatograph, preparative TLC, recrystalization and 19 compounds were identified by means of UV IR MS DEPT ~1HNMR ~13CNMR etc. 从四楞蒿氯仿部位、乙酸乙酯部位通过柱色谱、制备薄板、重结晶等方法分离得到了21个化合物,通过UV、IR、MS、DEPT、~1HNMR、~(13)CNMR等方法鉴定出其中的19个化合物,主要是黄酮类化合物,三萜类。
- silica gel colum 柱层析
- The crude oil is chromatographed over silica gel. 粗制油状物用硅胶进行色谱分离。
- 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。
- The handpiece cable is made from silica gel tube,soft and durable. 换能器尾线采用进口材料硅胶管，柔软耐用。
- All seals of this machine use the thermostable silica gel (food grade). 该机所有密封件均采用耐高温硅胶件（食品级）。
- There is no possibility to form silica gel in the hard-ened waterglass. 硬化的水玻璃实际上是失水的高模数水玻璃，不可能有硅凝胶生成。
- The specimen was extracted by the macroreticular resin and silica gel column. 样品经大孔树脂柱、硅胶柱分离，然后用TLC进行鉴定合并。
- You may reactivate the silica gel by desorbing the water through heating. 硅胶吸附水份后可通过脱附方式除掉水份而再生。
- The alternative use of buffered silica gel resulted in modest hydrolysis (~5-10%) of the imine. 选用温和的水解导致缓冲硅胶(~5-10%25)的亚胺.
- METHODS: Alcoholic extraction, silica gel, ODS column chromatography and recrystallization were used. 方法:采用工业酒精提取、胶柱层析、DS柱层析和重结晶等方法。
- Most of the commercially available reversed phase packing materials utilize fully end-capped, high-purity silica gel. 大部分市面上之逆相充填材料利用完善之终结处理,高纯度之矽胶。
- The pastern mold adopts wearable and heat-resistant silica gel, The aluminium mold can come to 200. 胶模采用耐磨热硅胶;外铝模温度可达200。
- Sand should be added carefully, otherwise the silica gel layer will be destructed. 装石英砂时应慢慢加入,不可一次加入而造成柱层破坏。
- Solid conveyor rollers coated with silica gel to bear heavy objects and minimize damage and wear. 输送滚轴全部选用实心滚轴、外部包硅胶,能承受大重量的物体及耐高温。
- A substance,such as calcium oxide or silica gel,that has a high affinity for water and is used as a drying agent. 干燥剂，脱水剂一种对水有很强吸附性的物质，常用作干燥剂例如:氧化钙，锗化硅等
- Electronics stepless speed regulation,conveyer utilized rotated bar with heatproof tube made of silica gel. 电子无级调速，输送机构采用自转式输送棒，并加耐热硅胶管。
- The optimal shaping condition was set as follows:48.8%EGB,45%MCC,6%PVPP,0.2%silica gel. 处方组成为48.;8%25银杏叶提取物;45%25微晶纤维素;6%25交联聚维酮;0
- Ti-modified silica gel monolithic adsorbent was prepared by impregnation-deposition method. 摘要采用浸渍沉积法制得钛改性硅胶块体吸附剂。
- A substance, such as calcium oxide or silica gel, that has a high affinity for water and is used as a drying agent. 干燥剂，脱水剂一种对水有很强吸附性的物质，常用作干燥剂例如：氧化钙，锗化硅等
