x-ray diffraction (xrd) and carbon nuclear magnetic resonance spectroscopy (13c-nmr) were adopted to study the structure change of armos fibers after irradiation.
通过x射线衍射(xrd)和碳核磁共振谱(13c-nmr)研究辐照改性前后芳纶纤维结构的变化。
nuclear magnetic resonance spectroscopy is a newly developed technical science.
核磁共振波谱学(nmr)是近代发展起来的一门边缘学科。
nuclear magnetic resonance spectroscopy is one of the most powerful analytical methods.
核磁共振分光学是最强有力的分析的方法之一。
results a compound was isolated and its structure was identified by nuclear magnetic resonance spectroscopy and mass spectrometry as 4-hydroxy-3-methoxy benzaldehyde.
根中分离得到一个化合物,经核磁、质谱、紫外和红外光谱法鑒定为4-羟基-3-甲氧基苯甲醛。