| 1. | Food products . vinegar . determination of acetic acid concentration
食品.醋.醋酸浓度的测定 |
| 2. | Monitor and control of sulphuric acid concentration and liquid level in sulphuric acid production
硫酸生产中硫酸浓度和液位的检测与控制 |
| 3. | Determination clavulanic acid concentration in fermentation liquor with spectrophotometry
紫外分光光度法测定发酵液中克拉维酸含量的研究 |
| 4. | Hydrochloric acid for industrial use - part 2 : evaluation of hydrochloric acid concentration by measurement of density
工业用盐酸.第2部分:通过密度测量评估盐酸的浓度 |
| 5. | The optimum conditions ( enzyme source , enzyme concentration , acid , acid concentration , reaction medium and reaction temperature , et al ) were screened out
对脂肪酶酶源、脂肪酶浓度、羧酸、羧酸浓度、温度、溶剂等反应条件进行筛选。 |
| 6. | In recent years , magnetic polymeric particles , due to their relatively rapid and easy magnetic separation , have been used in biomedical and bioengineering such as cell separation , immunoassy and nucleic acids concentration
磁性高分子复合微球是指通过适当的方法使有机高分子与无机磁性物质结合起来形成的具有一定磁性及特殊结构的微球。 |
| 7. | Under the optimum conditions , the response to the uric acid concentration was linear over range 1 . 0 to 100 mg . l - 1 with a regression equation of i = 3 . 09c ( mg . l - 1 ) + 2 . 1 ( r2 = 0 . 9992 , n = 6 ) and a detection limit of 0 . 1 mg . l - 1 ( 3 )
据此，将该发光体系应用于化学发光成像分析测定甲基多巴的研究中。在一定的实验条件下，发光强度与甲基多巴浓度成良好的线性关系。 |
| 8. | It ' s indicated that the zeta potential and total interaction energy of the colloidal particles are both at a maximum when the nitric acid concentration is 0 . 22mol / l for the alumina sols with a mol ratio of 1 : 50 between asb and h2o ,
结果表明，胶体颗粒的双电层厚度随硝酸的浓度的增加不断减小，对异丁醇铝与水的摩尔比为1 ： 50系溶胶，硝酸浓度为0 . 22mol l时胶体颗粒的zeta电位和作用位能最大。 |
| 9. | Abstract : the instruments for measuring sulphuric acid concentration and liquid level in drying and absorption section of sulphuric acid plant , as well as comprehensive control of sulphuric acid concentration and liquid level in different acid - mixing processes are described
文摘:介绍了硫酸生产中干吸工序硫酸浓度、液位的检测与控制仪表及其工作原理，以及不同串酸工艺的硫酸浓度和液位的综合控制。 |
| 10. | This paper mainly aims at the strategic demands for large - aperture lightweight mirror proposed by high - tech development . its main research contents are : select material blank for lightweight mirror according to physical and chemical properties of optical glass ; analyze and calculate the deformation quantity of the mirror with finite element method ; design and optimize mirror body structure of 400 lightweight plane mirror and 450 lightweight spherical mirror , analyze glass cutting principle , design specisl - use grinding wheel structure , select reasonable technological parameters to implement the processing of weight reduction holes on 400 plane mirror ; analyze etching mechanism of hydrofluoric acid , look for the technological parameters such as the optimal acid concentration and etching time etc . ; eliminate the stress of weight reduction holes and micro - cracks on 400 lightweight plane mirror ; discuss the processing principle and
本论文的研究主要是瞄准国家高技术对大口径轻型镜的战略需求而开展的。主要研究内容是：根据光学玻璃的物理与化学性能，选择轻型镜坯材料；用有限元法对镜子的变形进行分析、计算，找出变形规律，优化设计400mm轻型平面镜、 450mm轻型球面镜镜体结构；分析玻璃切削原理，设计专用磨轮结构，选择合理工艺技术参数，完成400mm平面镜轻量化减重孔的加工；分析氢氟酸腐蚀光学玻璃机理，寻找最佳酸浓度、腐蚀作用时间等工艺参数，实现400mm平面镜减重孔应力与微裂纹的消除；讨论分离器加工原理和工艺技术特点，完成400mm平面轻型镜面形加工。 |
