精胺 ( Spm ) 和腐胺 ( Put ) 在膨大过程中含量高,尸胺 ( Cad ) 和亚精胺 ( Spd ) 含量较低.Spermine ( Spm ) and putrescine ( Put ) content were significantly higher than cadavarine ( Cad ) and spermidine ( Spd ) during rhizome development.高氯酸溶液提取,丹酰...
本文利用DTA 、 XRD、TEM、SEM等技术研究了三种K2O-B2O3-SiO2玻璃的析晶性能.The crystallization of three K 2 O - B 2 O 3 - SiO 2 glasses has been studied by using DTA, XRD 、 TEM and SEM technique.方法采用渗滤、析晶、重结晶三 步法 提取分离,库仑滴定法测定含量.Methods: Three - ...