Methods FTIR and CD spectra were used to analyze the structure of SH.
方法采用傅里叶变换红外光谱（ FTIR）和圆二色谱（ CD）对SH的结构进行分析。
The rotational strength in the CD spectra in the visible range was increased when the humidity was higher than 70%.
从可见区的CD光谱中，也发现了在相对湿度大于70%后，旋转强度急剧上升。
The results indicated that the polymers exhibited stronger circular dichroism (CD)signals with positive and negative Cotton effect in their CD spectra.
结果说明聚合物在园二色谱中正负科顿效应都有强的园二色信号。
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