
[物] 电子自旋共振;顺磁共振
Objective To establish an electron spin resonance (ESR) method to estimate the dose of persons chronically exposed to ionizing radiation.
目的建立用牙釉电子自旋共振对慢性辐射损伤人员的受照剂量进行估算的方法。
Method ROS was measured by electron spin resonance(ESR)directly and the species of ROS were identified and quantified by the ultra-weak luminescence and chemical luminescence.
方法采用电子自旋共振(ESR)技术直接测量ROS ,并结合超微弱发光法、化学发光法等技术分析鉴定了ROS的种类。
METHODS The reaction product and free radical intermediate in the reaction medium with or without antioxidants and other moderators was detected by spectrophotometry and electron spin resonance(ESR).
方法用分光光度法和电子自旋共振技术(ESR)检测加入或未加抗氧化剂等调节物的反应体系中反应产物及自由基中间产物的生成情况。
This is used for cooling Scanning Probe Microscope heads, Electron Spin Resonance devices and a variety of other experiments.
可用于冷却扫描探针显微镜头部、 电子自旋共振器件和其他多种实验。
As a retros pective dosimetry technique, electron spin resonance has been applied to dose re construction wider and wider.
电子自旋共振作为一种回顾性剂量测定技术在剂量重建中应用日益广泛。
Electron spin resonance (ESR) method was used for studying radicals generated in low and high density polyethylene (LDPE and HDPE) by gamma ray irradiation.
研究了几种类型的聚乙烯膜在不同辐照气氛下生成的自由基的电子自旋共振(ESR)谱。
The scavenging effect of selenium on peroxy radical was directly investigated with two kinds of selenium compound by means of electron spin resonance (ESR) technique.
运用电子自旋共振(ESR)技术直接观察了两种硒的化合物对过氧自由基的清除作用。
Methods: Electron spin resonance (ESR) and the new techniques of spin labeling and oxygen spin probe were used in the study.
方法:采用电子自旋共振(ESR)、氧自旋探针和自旋标记等技术方法测定。
Surface properties of PVC were characterized by the contact angle, surface tension, X-ray photoelectron spectroscopy(XPS) and electron spin resonance(ESR).
等离子体改性前后PVC的表面特性通过接触角、表面张力、X-光电子能谱(XPS)、电子自旋共振(ESR)表征。
Electron Spin Resonance (ESR) analyses showed that ion implantation could lead to the formation of free radicals and the main cross-linking mode was the reactions among the free radicals.
电子自旋共振(ESR)分析显示离子注入可以形成自由基,离子注入诱发交联的方式主要为自由基交联。
The structure changes of lead silicate glasses induced by UV laser irradiation were stu***d by UV-visible spectra and electron spin resonance (ESR).
采用紫外-可见吸收光谱和电子自旋共振谱(ESR)对*********玻璃薄膜和体材料受紫外激光照射前后的结构变化进行了研究。
Electron spin resonance (ESR) spectra and optical absorption spectra in the visible region are determined.
测定了玻璃的顺磁共振谱(ESR)和可见吸收光谱。
The great acceleration of decomposition of reactant 2 in the presence of 1 was observed by kinetic stu***s. The signal of radical cation was detected by Electron Spin Resonance technique.
用顺磁共振技术检测到了反应过程中产生的阳离子基信号,证明反应物1和2的反应是单电子转移反应。
Based on the principle of electron spin resonance(ESR) a program for the spectral simulation of solution free radical has been developed written in advanced BASIC language.
根据溶液自由基电子自旋共振(ESR)原理,用高级BA SIC语言编写了溶液自由基谱的模拟程序。
Methods: The electron spin resonance(ESR)was used to observe the scavenging effect on the superoxide anion radical(O2.
方法:采用电子自旋共振技术(ESR)分别检测大黄中主要成分对O2。-的清除作用。结果:大黄中主要成分对O2。
The electron spin resonance (ESR) spectrums demonstrated the existence of Cu(II) and stable radicals during the polymerization process.
通过顺磁共振的方法证实了反应过程中二价铜和稳定自由基的存在。
This study was aiming to investigate the effects of Ginkgo biloba extract (GBE) on free radicals of different fibre types of quadriceps in rats by electron spin resonance (ESR).
用电子自旋共振(ESR)方法研究银杏叶提取物(GBE)对训练大鼠不同类型肌纤维自由基的作用。
The application of electron spin resonance in the study of polymerization, radiation and photodegradation, stress fracture, modification and mastication of rubber was reviewed with 22 references.
综述了电子自旋共振在橡胶的合成、加工和应用领域的应用现状及其发展前景。
Brewing process including mashing, boiling, fermentation and filtration was stu***d by electron spin resonance(ESR) method in this paper.
本文利用电子自旋技术(ESR)考察了啤酒酿造各阶段,包括糖化、煮沸、发酵、过滤中自由基的形成与变化情况。
Methods:Free radicals in coal soot were determined with electron spin resonance (ESR) spectrum technology.
方法:应用ESR波谱技术分析测定研究煤烟颗粒的自由基性质结构信息;
In this paper, the ESR (electron spin resonance) spectra of gold bearing quartz and pyrite have been systematically stu***d by means of JES FE1XG model ESR spectrometer.
利用JES-FE1XG型电子自旋共振波谱仪,系统地研究了含金石英与黄铁矿的电子自旋共振(ESR)波谱。
Electron spin resonance(ESR)and spin trapping agent-PBN were used to measure free radicals in brain following cold-induced injury and after treatment with SOD and mannitol.
用电子自旋共振技术(ESR)及自旋捕捉剂(PBN)直接检测冷冻伤及伤后应用SOD、甘露醇治疗的脑组织自由基动态改变;
Blood oxygen radicals were trapped by electron spin resonance (ESR) determination.
电子自旋共振(ESR)行全血氧自由基捕捉;
The scavenging effects of LC on oxygen free radical and hydroxyl radical(OH)were also investigated by using electron spin resonance (ESR) technique;
并用电子自旋捕集技术检测其对超氧阴离子自由基及羟自由基(OH-)的清除作用。
Concentration of blood free-radicals in 19 normal subjects and 35 patients with NIDDM was estimated by electron spin resonance spectrometer.
对19例健康人和35例NIDDM患者检测了全血自由基浓度、血清*********脂质和维生素E浓度。
New cell designs for simultaneous electrochemical(EC) and electron spin resonance (ESR) measurements are reported for coaxial microwave cavity.
本文报道了一种适用于同轴微波腔的新型ESR—电化学池的设计。
The purpose of this study was to use electron spin resonance (ESR) spectro scopy to demonstrate the generation of free radicals in lens and retina induced by ultraviolet and ischemic reperfusion.
本文用电子自旋共振(ESR)方法研究了兔晶体和视网膜经紫外线照射及视网膜缺血-再灌注后自由基信号的变化。
The electron spin resonance (ESR) signals of silicon and lithium-stored silicon were measured.
采用了电化学方法制备储锂硅材料,并用电子自旋共振(ESR)方法进行研究。
|paramagnetic resonance;[物]电子自旋共振;顺磁共振
电子自旋共振(Electron Spin Resonance,ESR)是一种基于未配对电子自旋特性的磁共振技术,主要用于检测含自由基、过渡金属离子等顺磁性物质的微观结构。其核心原理是:当外加静磁场作用于电子时,未配对电子的自旋能级会发生塞曼分裂,此时若施加特定频率的微波辐射,电子会吸收能量并发生能级跃迁,形成共振现象。
电子(Electron)
带负电荷的亚原子粒子,其量子力学属性包含自旋角动量。在顺磁性物质中,未配对电子的自旋方向在外磁场下呈现两种能级状态。
自旋(Spin)
电子的内禀角动量,具有量子化特征。自旋磁矩与外加磁场相互作用时产生能级分裂,分裂间距与磁场强度成正比,符合公式:
$$ Delta E = gmu_B B $$
其中( g )为朗德因子,( mu_B )为玻尔磁子,( B )为磁感应强度(来源:《磁共振波谱学基础》)。
共振(Resonance)
当微波频率与电子自旋能级差满足( h u = Delta E )时发生能量吸收,( h )为普朗克常数,( u )为微波频率。该条件称为电子顺磁共振条件(来源:美国国家标准与技术研究院电磁场实验室报告)。
电子自旋共振(Electron Spin Resonance,ESR),又称顺磁共振(Electron Paramagnetic Resonance,EPR),是一种用于研究含未成对电子物质的磁共振技术。以下是其核心要点:
定义
ESR通过检测顺磁性物质(如自由基、过渡金属离子)在磁场中吸收微波能量的现象,分析其未成对电子的能级跃迁。该技术广泛应用于物理、化学、生物医学和地质学等领域。
物理机制
典型ESR谱仪包括微波源、谐振腔、样品座、信号检测系统等模块。
如需进一步了解具体实验方法或案例,可参考相关文献或专业教材。
strangerresignationratifyrecalcitrantpoohedarsismaintainerofferedravagedsedimentologySuellenvariegatingbe determined byBilling Addressbuoyancy forceghost towninstantaneous powerinvestment fundradio astronomyretinal pigmentutilization rateairconditionedaskerEPSharmonisthybridisehydrophiliainsolubilizeLFUbrucite