经化学与光谱方法鉴定其结构。
Their structures were identified based on chemical and spectroscopic methods.
方法利用反相层析的方法进行分离纯化，根据化合物的化学性质与光谱数据鉴定其结构。
Methods to isolate the constituents by reverse phase chromatography, and characterize their structures by the analysis of chemical property and spectral data.
采用现代技术分离黄瑞香、陕甘瑞香和结香中的化学成分，鉴定了63个（次） 单体化合物的结构。
The chemical investigation resulted in the isolation of 63 compounds, and the structures were determined based on the modern spectral technology.
方法：采用反复硅胶柱色谱、葡聚糖凝胶色谱等分离纯化，通过理化常数和波谱分析鉴定其化学结构。
Methods:The isolation and purification were carried out by repeated silica gel column chromatography, and the chemical structures were determined by physicochemical properties and spectral analysis.
方法：采用聚酰胺、硅胶柱色谱、高效液相色谱分离化学成分，UV、IR、NMR、MS等方法进行结构鉴定。
METHOD: the chemical constituents were isolated by using polyamide, silica gel column chromatography and HPLC, and the chemical structures were elucidated by UV, IR, NMR and MS.
具体的化学结构还有待于进一步分析鉴定。
The specific chemical structure should be analyzed and identified ulteriorly.
中药化学课程教学难点是要求学生根据中药化学知识，灵活应用于中药提取分离、结构鉴定等。
That requires a leaner to flexible master the identification and extraction method of chemical compositions of CTMC knowledge is the teaching difficult in the course.
方法色谱方法分离化学成分，波谱技术及理化常数鉴定结构。
Method Separation by chromatographic methods, identification by spectral analysis and physical chemical constants.
其化学结构经光谱解析和化学方法鉴定。
All structures of the compounds were established by spectral interpretation and chemical methods.
此外我们的研究还表明，NMR的量子化学计算为天然产物的结构鉴定提供了一种新的工具。
This work shows that the quantum chemistry study of NMR can serve as a promising tool in aiding structural assignment of natural products.
已有500多种毒素得到鉴定，但这种传统分析方法仅得出少数毒素的化学结构图，少于10种。
More than 500 toxins have been identified, but traditional methodology may only give part of the picture of contamination, accounting for the presence of less than 10 of those.
结果经化学、TLC和波谱学方法进行结构鉴定，确定为16种氨基酸，两种糖及黄酮类成分。
ResultsThe chemical, TLC and spectral methods were used to determine the structures of the isolated compounds. 16 kinds of amino acids, 2 kinds of sugar and flavonoid compositions were confirmed.
制备了其有关物质二聚物，并通过波谱数据及原子吸收分光光度法鉴定了其化学结构，还测定了该化合物在制剂中的含量。
This chemosynthetic dimer substance was elucidated by spectra analysis and atomic absorption spectrophotometry. Meanwhile the dimer was determined by UPLC-MS for its content in the preparations.
制备了其有关物质二聚物，并通过波谱数据及原子吸收分光光度法鉴定了其化学结构，还测定了该化合物在制剂中的含量。
This chemosynthetic dimer substance was elucidated by spectra analysis and atomic absorption spectrophotometry. Meanwhile the dimer was determined by UPLC-MS for its content in the preparations.
应用推荐