An improved external loop resonator for in vivo L-band EPR spectroscopy
An improved external loop resonator for in vivo L-band EPR spectroscopy
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DOI：
10.1016/s1090-7807(03)00175-7
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发表时间：
2003-09-01
影响因子：
2.2
通讯作者：
Swartz, HM
中科院分区：
文献类型：
--
作者：
Salikhov, I;Hirata, H;Swartz, HM
报道了一种用于L波段电子顺磁共振光谱的改进型外环谐振器。这一改进是通过缩短平行同轴线实现的。谐振结构由两个单圈线圈(直径10 mm)连接到一条平行的同轴线形成。在没有生物组织的情况下，获得了1197 MHz的共振频率和466的品质因数，与活体动物的共振频率和品质因数分别接近1130 MHz和50。使用三种类型的EPR样本：(1)没有生物组织的顺磁材料，(2)死鼠腿和腹膜中的顺磁材料，以及(3)麻醉大鼠背部的顺磁材料，比较了新的ELR和以前开发的ELR的灵敏度。在大鼠体内的灵敏度是大鼠的1.2-1.6倍，在无组织的情况下是4.2倍。(C)2003年埃尔塞维尔科学公司(美国)。版权所有。
An improved external loop resonator (ELR) used for L-band electron paramagnetic resonance (EPR) spectroscopy is reported. This improvement is achieved by shortening the parallel coaxial line. The resonant structure is formed by two single turn coils (10 mm in diameter) that are connected to a parallel coaxial line. A resonance frequency of 1197 MHz and a quality factor of 466 were obtained in the absence of biological tissue and similar to1130 MHz and similar to50 with a living animal, respectively. The sensitivity of the new ELR was compared to the previously developed ELR using three types of EPR samples: (1) paramagnetic material with no biological tissue, (2) paramagnetic material in a leg and in the peritoneal cavity of a dead rat, and (3) paramagnetic material in the back of an anesthetized rat. The sensitivity was 1.2-1.6 times greater in the rat and 4.2 times without tissue. (C) 2003 Elsevier Science (USA). All rights reserved.