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常用詞典

  • [物] 電子自旋共振;順磁共振

  • 例句

  • Objective To establish an electron spin resonance (ESR) method to estimate the dose of persons chronically exposed to ionizing radiation.

    目的建立用牙釉電子自旋共振對慢性輻射損傷人員的受照劑量進行估算的方法。

  • 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.

    方法采用電子自旋共振(ESR)技術直接測量ROS ,并結合超微弱發光法、化學發光法等技術分析鑒定了ROS的種類。

  • 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電子自旋共振技術(ESR)檢測加入或未加抗氧化劑等調節物的反應體系中反應産物及自由基中間産物的生成情況。

  • This is used for cooling Scanning Probe Microscope heads, Electron Spin Resonance devices and a variety of other experiments.

    可用于冷卻掃描探針顯微鏡頭部、 電子自旋共振器件和其他多種實驗。

  • As a retros pective dosimetry technique, electron spin resonance has been applied to dose re construction wider and wider.

    電子自旋共振作為一種回顧性劑量測定技術在劑量重建中應用日益廣泛。

  • Electron spin resonance (ESR) method was used for studying radicals generated in low and high density polyethylene (LDPE and HDPE) by gamma ray irradiation.

    研究了幾種類型的聚乙烯膜在不同輻照氣氛下生成的自由基的電子自旋共振(ESR)譜。

  • 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.

    運用電子自旋共振(ESR)技術直接觀察了兩種硒的化合物對過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:采用電子自旋共振(ESR)、氧自旋探針和自旋标記等技術方法測定。

  • Surface properties of PVC were characterized by the contact angle, surface tension, X-ray photoelectron spectroscopy(XPS) and electron spin resonance(ESR).

    等離子體改性前後PVC的表面特性通過接觸角、表面張力、X-光電子能譜(XPS)、電子自旋共振(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.

    電子自旋共振(ESR)分析顯示離子注入可以形成自由基,離子注入誘發交聯的方式主要為自由基交聯。

  • 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-可見吸收光譜和電子自旋共振譜(ESR)對*********玻璃薄膜和體材料受紫外激光照射前後的結構變化進行了研究。

  • Electron spin resonance (ESR) spectra and optical absorption spectra in the visible region are determined.

    測定了玻璃的順磁共振譜(ESR)和可見吸收光譜。

  • 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.

    用順磁共振技術檢測到了反應過程中産生的陽離子基信號,證明反應物1和2的反應是單電子轉移反應。

  • 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.

    根據溶液自由基電子自旋共振(ESR)原理,用高級BA SIC語言編寫了溶液自由基譜的模拟程式。

  • Methods: The electron spin resonance(ESR)was used to observe the scavenging effect on the superoxide anion radical(O2.

    方法:采用電子自旋共振技術(ESR)分别檢測大黃中主要成分對O2。-的清除作用。結果:大黃中主要成分對O2。

  • The electron spin resonance (ESR) spectrums demonstrated the existence of Cu(II) and stable radicals during the polymerization process.

    通過順磁共振的方法證實了反應過程中二價銅和穩定自由基的存在。

  • 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).

    用電子自旋共振(ESR)方法研究銀杏葉提取物(GBE)對訓練大鼠不同類型肌纖維自由基的作用。

  • 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.

    綜述了電子自旋共振在橡膠的合成、加工和應用領域的應用現狀及其發展前景。

  • Brewing process including mashing, boiling, fermentation and filtration was stu***d by electron spin resonance(ESR) method in this paper.

    本文利用電子自旋技術(ESR)考察了啤酒釀造各階段,包括糖化、煮沸、發酵、過濾中自由基的形成與變化情況。

  • Methods:Free radicals in coal soot were determined with electron spin resonance (ESR) spectrum technology.

    方法:應用ESR波譜技術分析測定研究煤煙顆粒的自由基性質結構信息;

  • 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型電子自旋共振波譜儀,系統地研究了含金石英與黃鐵礦的電子自旋共振(ESR)波譜。

  • 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.

    用電子自旋共振技術(ESR)及自旋捕捉劑(PBN)直接檢測冷凍傷及傷後應用SOD、甘露醇治療的腦組織自由基動态改變;

  • Blood oxygen radicals were trapped by electron spin resonance (ESR) determination.

    電子自旋共振(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;

    并用電子自旋捕集技術檢測其對超氧陰離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.

    對19例健康人和35例NIDDM患者檢測了全血自由基濃度、血清*********脂質和維生素E濃度。

  • New cell designs for simultaneous electrochemical(EC) and electron spin resonance (ESR) measurements are reported for coaxial microwave cavity.

    本文報道了一種適用于同軸微波腔的新型ESR—電化學池的設計。

  • 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.

    本文用電子自旋共振(ESR)方法研究了兔晶體和視網膜經紫外線照射及視網膜缺血-再灌注後自由基信號的變化。

  • The electron spin resonance (ESR) signals of silicon and lithium-stored silicon were measured.

    采用了電化學方法制備儲锂矽材料,并用電子自旋共振(ESR)方法進行研究。

  • 同義詞

  • |paramagnetic resonance;[物]電子自旋共振;順磁共振

  • 專業解析

    電子自旋共振(Electron Spin Resonance,ESR)是一種基于未配對電子自旋特性的磁共振技術,主要用于檢測含自由基、過渡金屬離子等順磁性物質的微觀結構。其核心原理是:當外加靜磁場作用于電子時,未配對電子的自旋能級會發生塞曼分裂,此時若施加特定頻率的微波輻射,電子會吸收能量并發生能級躍遷,形成共振現象。

    核心術語解析

    1. 電子(Electron)

      帶負電荷的亞原子粒子,其量子力學屬性包含自旋角動量。在順磁性物質中,未配對電子的自旋方向在外磁場下呈現兩種能級狀态。

    2. 自旋(Spin)

      電子的内禀角動量,具有量子化特征。自旋磁矩與外加磁場相互作用時産生能級分裂,分裂間距與磁場強度成正比,符合公式:

      $$ Delta E = gmu_B B $$

      其中( g )為朗德因子,( mu_B )為玻爾磁子,( B )為磁感應強度(來源:《磁共振波譜學基礎》)。

    3. 共振(Resonance)

      當微波頻率與電子自旋能級差滿足( h u = Delta E )時發生能量吸收,( h )為普朗克常數,( u )為微波頻率。該條件稱為電子順磁共振條件(來源:美國國家标準與技術研究院電磁場實驗室報告)。

    技術應用領域

    網絡擴展資料

    電子自旋共振(Electron Spin Resonance,ESR),又稱順磁共振(Electron Paramagnetic Resonance,EPR),是一種用于研究含未成對電子物質的磁共振技術。以下是其核心要點:

    定義與基本原理

    1. 定義
      ESR通過檢測順磁性物質(如自由基、過渡金屬離子)在磁場中吸收微波能量的現象,分析其未成對電子的能級躍遷。該技術廣泛應用于物理、化學、生物醫學和地質學等領域。

    2. 物理機制

      • 未成對電子具有自旋磁矩,在外磁場($B$)作用下發生Zeeman分裂,形成兩個能級(磁量子數$m_s = pm1/2$)。
      • 當外加微波頻率($ u$)滿足共振條件時,電子吸收能量躍遷,公式為:
        $$ h u = gmu_B B $$
        其中,$h$為普朗克常數,$g$為光譜分裂因子(自由電子$g≈2.0023$),$mu_B$為玻爾磁子。

    應用領域

    儀器組成

    典型ESR譜儀包括微波源、諧振腔、樣品座、信號檢測系統等模塊。

    如需進一步了解具體實驗方法或案例,可參考相關文獻或專業教材。

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