Their structures were identified based on chemical and spectroscopic methods.
经化学与光谱方法鉴定其结构。
Spectroscopic methods including UV-dichroism and FT-IR were used to study the p…
用紫外二色性和付里埃红外等光谱方法，对其光致取向行为进行了研究。
The structures of the compounds 3 and 4 were confirmed by elementary analyses and spectroscopic methods.
用元素分析和波谱方法确定化合物3和4的结构，用杯盘培养法测化合物4的抑菌活性。
Method: The compounds were extracted with solvents, isolated by various column chromatography and identified by spectroscopic methods.
方法：溶剂提取及各种柱色谱法分离，光谱技术鉴定结构。
Based on experimental results, spectroscopic methods are presented for analyzing spectra of Sn and fe in Ti-based alloys and for identifying different kinds of Ti-based alloys.
根据实验结果，提出了利用看谱镜对钛合金中的锡、铁元素进行光谱分析及牌号鉴别的方法。
METHODS Chromatographic and spectroscopic methods were used to isolate and identify the related substance in isepamicin, and antibacterial activity of two related substances was studied.
方法运用色谱学和波谱学方法分离和鉴定硫酸异帕米星中的有关物质，并做体外抗菌试验。
The substance, which may have a role in fungal virulence, has been characterized mainly using spectroscopic methods (1H and 13C nuclear magnetic resonance and high resolution mass spectra).
该物质，可能有一个真菌毒力的作用，就一直主要是利用光谱方法（1H和13C核磁共振和高分辨质谱）。
These components have been characterized by spectroscopic methods (FT-IR), namely acid number, basic nitrogen number, ultimate analysis and molecular weight measurements using vapor pressure.
之后对这些组分进行了元素、酸碱值、相对分子质量及红外光谱等组成结构测定。
The calculation formulas and methods given in this work can be applied to other spectroscopic experiments.
本工作给出的计算公式和方法可在其他光谱实验中获得应用。
METHODS The compounds were separated by column chromatography with silica gel and prep-HPLC, whoso structures were elucidated on the basis of spectroscopic data and physicochemical properties.
方法利用硅胶柱色谱、制备高效液相色谱等方法进行分离，根据化合物的光谱数据和理化性质鉴定其结构。
Spectroscopic recognition reagents are the basis for establishing new spectroscopic analytical methods, and have been widely used in many fields.
光学识别试剂是建立有关光学分析方法的物质基础，在许多领域中具有极强的应用背景。
Up-to-the-art developments of spectroscopic techniques are reviewed, including digital spectrometer, CdZnTe detector, new spectrum analysis methods and new spectrometer system design techniques.
从数字化谱仪、碲锌镉探测器应用、能谱分析新方法和谱仪系统设计新技术等方面综述了近年来国内外谱仪技术的研究及进展。
Their structures and some of the stereochemistry were elucidated by means of various modern spectroscopic techniques and chemical methods.
运用多种现代波谱技术结合化学手段，确定了它们的化学结构和部分立体构型。
Methods Ultraviolet spectroscopic method was used.
方法采用紫外分光光度法。
Methods: the constituents were isolated by chromatographic methods, and their structures were elucidated by spectroscopic evidences.
方法：采用柱色谱分离其成分，波谱学方法鉴定其结构。
METHODS the compounds were isolated and purified by various chromatographic techniques and their structures were elucidated by physicochemical properties and spectroscopic data.
方法采用各种色谱技术进行分离纯化，通过化合物理化性质及波谱数据进行结构鉴定。
Methods a new compound was isolated by the silica gel and Sephadex LH-20 column chromatograph, and identified by the physicochemical characters and spectroscopic analysis.
方法采用硅胶柱色谱、凝胶柱色谱进行分离，通过理化性质和波谱分析方法鉴定化合物结构。
Methods a new compound was isolated by the silica gel and Sephadex LH-20 column chromatograph, and identified by the physicochemical characters and spectroscopic analysis.
方法采用硅胶柱色谱、凝胶柱色谱进行分离，通过理化性质和波谱分析方法鉴定化合物结构。
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