pfg nmr 的优势和局限 4. pfg nmr 在化学和材料科学中的前景 正文: 1. pfg nmr 技术简介 PFG NMR(Pulsed Field Gradient Nuclear Magnetic Resonance)是一种旨在通过引入脉冲磁场梯度来区分不同位置处的核自旋的技术。这种方法利用了不同位置处的核自旋在磁场梯度下的漂移速度不同的原理,从而实现对样品中不同...
PFGNMR Dictionary, Encyclopedia and Thesaurus - The Free Dictionary13,867,064,144visits served TheFreeDictionary Google ? Keyboard Word / Article Starts with Ends with Text EnglishEspañolDeutschFrançaisItalianoالعربية中文简体PolskiPortuguêsNederlandsNorskΕλληνικήРусс...
Rauchfuß, “PFG NMR Self-Diffusion Measurements with Large Field Gradients,” J. Magn. Reson. , A114 , 101–104 (1995).W. Heink, J. K¨arger, G. Seiffert, G. Fleischer, and J. Rauchfuss, ``PFG NMR Self-diffusion Measure- ments with Large Field Gradients,'' J. Magn. Re- ...
PFG NMR experiments have particularly demanding requirements in terms of gradient amplifier performance and practical factors that may impact this are discussed. A detailed discussion of spectrometer technology provides information on the individual spectrometer subsystems, as well as a description of common...
PFG-NMRself-diffusionSi/Al ratiozeoliteThe understanding of major zeolite applications is partially based on diffusion of molecules inside or outside microporous networks. However, it is still a challenge to measure such phenomena. The diffusion ordered nuclear magnetic resonance spectroscopy (DOSY) ...
PFGNMR测量自扩散系数的应用,PFGNMR测量自扩散系数的应用,自扩散系数,氮氧化物的扩散系数,水的扩散系数,扩散系数与温度的关系,扩散系数的物理意义,气体的扩散系数,铜的热扩散系数,空气的扩散系数,水的热扩散系数,PFGNMR测量自扩散系数的应用相关精品文档 更多 点源激发表面热波耦合红外成像的壁体材料热扩散率及局部...
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔ 利用 PFG-NMR 技術來測量幾丁聚醣平均分子量 李貞儀、陳一帆、錢偉鈞*、陳齊聖 朝陽科技大學應用化學系 摘要 由脈衝磁場梯度核磁共振光譜技術 (Pulsed Field Gradient-NMR)偵測降解後 幾丁聚醣之擴散...
脉冲梯度场核磁共振(PFG-NMR)方法是通过核自旋的自扩散行为来测定整个分子的自扩散系数,因此PFG-NMR方法不受所 … www.polymer.cn|基于 1 个网页 3. 脉冲梯度场核磁共振技术 利用脉冲梯度场核磁共振技术(PFG-NMR)研究蔗糖对面团自旋-自旋弛豫特性的影响。分子的自旋-自旋弛豫特性与分子的流动 … ...
2024年5月《ChemCatChem》在线发表了Using PFG-NMR and iGC to Study Diffusion and Adsorption in Heterogeneous Catalysts。这篇论文的核心内容是探讨了脉冲场梯度核磁共振(PFG-NMR)和反气相色谱(iGC)技术结合使用的可能性和特点,以及它们在研究多孔体系中的分子扩散,特别是在非均相催化剂中的扩散和吸附方面的应用。
A survey is given on the possibilities of pulsed field gradient (PFG) NMR to study molecular diffusion in beds of microporous adsorbent particles (zeolite crystallites). Depending on the given adsorbate-adsorbent system, the PFG NMR data on intracrystalline diffusion are both in agreement and disag...