目的:建立荧光微量 DNA 含量测定方法,用于重组细胞因子的质量控制。方法:应用 PicoGreen 荧光试剂与 DNA 结合能产生可激发荧光的复合物、再用荧光酶标仪对复合物进行检测并用 SOFTmaxPRO 分析软件进行分析。结果:该荧光法 DNA检测灵...目的:建立荧光微量 DNA 含量测定方法,用于重组细胞因子的质量控制。方法:应用 PicoGreen 荧光试剂与 DNA 结合能产生可激发荧光的复合物、再用荧光酶标仪对复合物进行检测并用 SOFTmaxPRO 分析软件进行分析。结果:该荧光法 DNA检测灵敏度达到312 pg·mL^(-1),DNA 含量在0.31～80n·mL^(-1)范围内线性良好,r≥0.996。应用该法对7种重组细胞因子共13批制品的外源 DNA 含量进行测定,结果表明:除重组人 BMP 和 IL-11以外,其它重组细胞因子 DNA 含量均小于10ng·剂量^(-1),与地高辛标记的 DNA 杂交试验结果基本一致。结论:该方法具有简便、快速、自动化程度高等特点,可用于重组细胞因子残余外源 DNA 含量的常规检定。展开更多
The efficiency of water flooding in heavy oil reservoirs would be improved by increasing the viscosity of the displacing phase, but the sweep efficiency is not of significance due to the low mobility of the vicious oi...The efficiency of water flooding in heavy oil reservoirs would be improved by increasing the viscosity of the displacing phase, but the sweep efficiency is not of significance due to the low mobility of the vicious oil. On the basis of mobility control theory, increasing the residual resistance factor not only reduces the water-oil mobility ratio but also decreases the requirement for viscosity enhancement of the polymer solution. The residual resistance factor caused by hydrophobic associating polymer solution is higher than that caused by polyacrylamide solution in brine containing high concentrations of calcium and magnesium ions. The results of numerical simulations show that the polymer flooding efficiency improved by increasing the residual resistance factor is far better than that by only increasing solution viscosity. The recovery factor of heavy oil reservoirs （70 mPa·s） can be enhanced by hydrophobic associating polymer solution of high residual resistance factor （more than 3） and high effective viscosity （24 mPa·s）. Therefore, increasing the residual resistance factor of the polymer solution not only decreases the requirement for the viscosity of polymer solution injected into heavy oil reservoirs but also is favorable to enhanced oil recovery during polymer flooding.展开更多
文摘目的:建立荧光微量 DNA 含量测定方法,用于重组细胞因子的质量控制。方法:应用 PicoGreen 荧光试剂与 DNA 结合能产生可激发荧光的复合物、再用荧光酶标仪对复合物进行检测并用 SOFTmaxPRO 分析软件进行分析。结果:该荧光法 DNA检测灵敏度达到312 pg·mL^(-1),DNA 含量在0.31～80n·mL^(-1)范围内线性良好,r≥0.996。应用该法对7种重组细胞因子共13批制品的外源 DNA 含量进行测定,结果表明:除重组人 BMP 和 IL-11以外,其它重组细胞因子 DNA 含量均小于10ng·剂量^(-1),与地高辛标记的 DNA 杂交试验结果基本一致。结论:该方法具有简便、快速、自动化程度高等特点,可用于重组细胞因子残余外源 DNA 含量的常规检定。
基金supported by the National High Technology Research and Development Program of China (863 Program: 2006AA09Z315 and 2007AA090701-3)
文摘The efficiency of water flooding in heavy oil reservoirs would be improved by increasing the viscosity of the displacing phase, but the sweep efficiency is not of significance due to the low mobility of the vicious oil. On the basis of mobility control theory, increasing the residual resistance factor not only reduces the water-oil mobility ratio but also decreases the requirement for viscosity enhancement of the polymer solution. The residual resistance factor caused by hydrophobic associating polymer solution is higher than that caused by polyacrylamide solution in brine containing high concentrations of calcium and magnesium ions. The results of numerical simulations show that the polymer flooding efficiency improved by increasing the residual resistance factor is far better than that by only increasing solution viscosity. The recovery factor of heavy oil reservoirs （70 mPa·s） can be enhanced by hydrophobic associating polymer solution of high residual resistance factor （more than 3） and high effective viscosity （24 mPa·s）. Therefore, increasing the residual resistance factor of the polymer solution not only decreases the requirement for the viscosity of polymer solution injected into heavy oil reservoirs but also is favorable to enhanced oil recovery during polymer flooding.
