• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of magnetic resonance >~1H NMR Imaging of Residual Dipolar Couplings in Cross-Linked Elastomers: Dipolar-Encoded Longitudinal Magnetization, Double-Quantum, and Triple-Quantum Fiters
【24h】

~1H NMR Imaging of Residual Dipolar Couplings in Cross-Linked Elastomers: Dipolar-Encoded Longitudinal Magnetization, Double-Quantum, and Triple-Quantum Fiters

机译：交联弹性体中残留偶极偶合的〜1H NMR成像：偶极编码的纵向磁化，双量子和三量子接头

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Contrast filters for NMR imaging of residual ~1H dipolar couplings of elastomers are introduced based on dipolar-encoded longitudinal magnetization, as well as double- and triple-quantum coherences. The spin response is discussed in the initial excitation time regime for methylene, methyl, and methine protons applicable to poly(isoprene) and other elastomers, taking into account the hierarchy of dipolar couplings and the associatediting features of multiple-quantum experiments. The efficiency of these filters is investigated for a series of cross-linked poly(isoprene) samples. Spatially resolved dipolar-encoded longitudinal magnetization decays and double-quantum and triple-quantum buildup curves are presented for a phantom made of poly(isoprene) with different cross-link densities. Two-dimensional images representing residual dipolar couplings are presented using dipolar-encoded longitudinal magnetization, double-quantum, and triple-quantum contrast filters. Images from dipolar-encoded longitudinal magnetizaiton and triple-quantum coherences show the highest resolution and contrast, respectively.
机译：基于偶极编码的纵向磁化以及双量子和三量子相干性，引入了用于弹性体残留〜1H双极偶合的NMR成像的对比滤光片。考虑到偶极耦合的层次和多量子实验的相关特征，在适用于聚异戊二烯和其他弹性体的亚甲基，甲基和次甲基质子的初始激发时间范围内讨论了自旋响应。对于一系列交联的聚异戊二烯样品，研究了这些过滤器的效率。空间解析的偶极编码的纵向磁化强度衰减，以及由不同异交联密度的聚异戊二烯制成的体模，给出了双量子和三量子积累曲线。使用偶极编码的纵向磁化，双量子和三量子对比滤镜呈现了表示残留偶极耦合的二维图像。来自偶极编码的纵向磁化强度和三量子相干的图像分别显示了最高的分辨率和对比度。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号