1) proton spin-lattice relaxation rate
质子自旋-晶格弛豫速率
2) Spin-lattice relaxation
自旋-晶格弛豫
3) spin lattice relaxation
自旋晶格弛豫
1.
The extended Solomon equations are used to describe the 13 C spin lattice relaxation with the 1H RF field irradiation It is shown that the 13 C spin lattice relaxation with the 1H RF field irradiation is generally a triple exponential course, which can be reduced to a single exponential course in the absence of the 1H initial magnetization and with strong enough RF field irradiation.
用扩展的Solomon方程描述1H受到射频 (RF)场照射时13 C的自旋晶格弛豫过程 。
4) ~1H spin-spin relaxation
质子自旋自旋弛豫
5) Spin-lattice relaxation time
自旋-晶格弛豫时间
6) spin-lattice relaxation time
自旋晶格弛豫时间
1.
The phase of aluminum citrate in an aqueous solution was investigated by using ()~(27)Al nuclear magnetic resonance, spin-lattice relaxation time, digital matching, atomic absorption spectrography and dialysis methods.
通过分析27Al核磁共振波谱、自旋晶格弛豫时间,结合数字拟合方法、渗析法和原子吸收分光光度法,对柠檬酸铝的形态结构及其影响因素进行了研究;利用转变压法研究了pH值对部分水解聚丙烯酰胺与柠檬酸铝体系交联过程的影响。
2.
According to the similarity of the repeating units of these polyimides, as well as the substitution effect and the spin-lattice relaxation time, the peaks in carbon-13 and proton spectra were assigned in detail.
利用这3种样品化学结构的相似性，根据PEI的DEPT谱，PEI和POI的二维同核化学位移相关谱（2D-COSY），碳氢自旋晶格弛豫时间以及化学位移的理论计算，详细分析并归属了3种聚酰亚胺的碳谱峰和氢谱峰，同时验证了其重复单元结构的正确性。
3.
The spin-lattice relaxation times for carbons and protons were measured.
测定了其碳及氢的自旋晶格弛豫时间，通过与类似物质标准谱图的比较、自旋晶格弛豫时间的分析以及化学位移取代基效应的计算等，归属了其碳氢谱峰。
补充资料：自旋-晶格弛豫
自旋-晶格弛豫
磁共振成像术语。又称纵向弛豫(longitudinal relaxation)或T1弛豫。指平行于外磁场B0方向的磁化矢量的指数性恢复的过程。磁共振成像时，对置于外磁场B0中的自旋系统施加射频脉冲，则自旋系统被激励，其净磁化矢量指向偏转，不再与外磁场B0方向平行(如与B0垂直)。射频脉冲终止后，被激励的质子与周围环境(晶格)之间发生能量交换，把能量传递给周围的晶格，同时其净磁化矢量指向逐渐恢复与外磁场方向平行。该过程在自旋与晶格之间有能量交换，故自旋-晶格弛豫又称热弛豫。自旋-晶格弛豫与外磁场场强有关。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条