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脉冲梯度
相关语句
  pulsed gradient
     Ultralow Frequency Pulsed Gradient Magnetic Field Inhibited Sarcoma and the Mechanism Discussion
     超低频脉冲梯度磁场治疗肿瘤及其机理的探讨
短句来源
     Observation with an electron microscope showed that a pulsed gradient magnetic field inhibited the growth of S 180 sarcoma in mice and enhanced the ability of the immune cells to dissolve cancer cells.
     用电镜观测脉冲梯度磁场抑制鼠S - 180肉瘤生长和加强免疫细胞溶癌作用 .
短句来源
     We have reported the experiment studies on treating sarcoma with ultralow frequency pulsed gradient magnetic field and discussed its probable mechanism in this article.
     报道了用超低频脉冲梯度磁场治疗肿瘤的实验研究以及对其机理的探讨 .
短句来源
  “脉冲梯度”译为未确定词的双语例句
     P TYPE GRADIENT ENHANCED DQF COSY EXPERIMENTS SHOW LOWER t 1 NOISE THAN N TYPE *
     脉冲梯度场增强的DQF-COSY实验t_1噪声研究(英文)
短句来源
     A pulse gradient field instrument for pulse gradient-enhanced high-resolution NMR was developed on Bruker MSL 300 spectrometer.
     自行研制一套脉冲梯度场系统,配合Bruker公司MSL300谱仪研究脉冲梯度增强的高分辨核磁共振,研制以PC/286为核心的梯度脉冲波形和幅度可任意调节的梯度场发生器;
短句来源
     Methods: Pulsed-gradient magnetic fields with the maximum intensity of 0.6-20 T, gradient of 10-100 T·M-1, pulse width of 20-200 ms and frequency of 0.16-1.34 Hz, treatment of mice can inhibit murine malignant tumour growth, as seen from analyses at different hierarchical levers, from organism, organ, to tissue, and down to cell and macromolecules.
     方法 :用脉冲梯度磁场 (峰值磁场 0 .6- 2 .0T ,磁场梯度 1 0 - 1 0 0T·M - 1 ,脉冲宽度 2 0 - 2 0 0ms,重复频率 0 .1 6- 1 .34Hz)治疗白鼠 ,在不同生物层次上 ,例如生物活体、器官、组织、细胞和大分子 ,能抑制鼠恶性肿瘤生长。
短句来源
     STUDY OF DIFFUSION COEFFICIENT DISTRIBUTION OF LIPOPROTEINS BY PULSE-FIELD-GRADIENT (PFG)-NMR
     应用脉冲梯度场NMR研究脂蛋白的自扩散系数分布
短句来源
     Phencyclonate {2′-pheny-2′-cycloamyl-2′-hydroxyacetic-N-methly-3-azabiclo nonane-9a-carboxylate} was synthesized and studied by 1D-HOHAHA and 1D-NOESY NMR spectroscopy employing frequency-selective radiofrequency pulses and pulsed field gradients.
     中枢抗胆碱药物苯环壬酯2′苯基2′环戊基2′羟基乙酸N甲基3氮杂双环(3,3,1)壬9α酯的化学结构比较复杂,部分谱峰重叠,本文采用2种NMR新方法,MMDY混合脉冲梯度选择一维HOHAHA和多重激发梯度选择一维NOESY相结合对其1HNMR和立体化学进行了研究,重叠谱峰的归属得到确定.
短句来源
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  相似匹配句对
     Second, the introduction of the Pulse Field Gradient is given in detail.
     第二,脉冲梯度单元。
短句来源
     PRELIMINARY STUDY OF PULSE GRADIENT-ENHANCEDHIGH-RESOLUTION NMR TECHNIQUE
     脉冲梯度增强技术的初步研究
短句来源
     Pulse plating of Nickel
     脉冲镀镍
短句来源
     Pulse Zn Electroplating
     脉冲镀锌
短句来源
     at a flow rate is about 1ml/min by gradient elution.
     梯度洗脱。
短句来源
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  pulsed gradient
Molecular Mobility in a Poly(ethylene glycol)-Poly(vinyl pyrrolidone) Blends: Study by the Pulsed Gradient NMR Techniques
      
Donskaya 1) was investigated with a pulsed gradient NMR using mercuric chloride as an inhibitor of water channels in cell membranes.
      
It was found that the growth of malignant tumour in mice was inhibited and the ability of immune cell's dissolving cancer cells was enhanced by ultralow frequency (ULF) pulsed gradient magnetic field.
      
Secondly, these results are also confirmed by the anisotropy of the self-diffusion tensor of the water molecule measured by 1H Pulsed Gradient Spin Echo NMR.
      
As for the adult population, a pulsed gradient spin echo sequence (PGSE) with cardiac gating can be used to exploit the effect of diffusion on image contrast and to determine the apparent diffusion co-efficient (D*) for tissues or fluids.
      
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In this paper,pulsed field gradients are used to suppress the rapid-pulsing artifacts.Due to its superior homospoil charactersitic,pulsed field gradients offer an important method for removal of artifacts when data is being acquired fast compared to the relaxation times of the nuclei under study.The experimential results show that the quality of DQF-COSY spectra can be improved by the modified pulsc sequence,and the pulsed field gradients provide a good method for ultra-rapid acquisition 2D COSY-like NMR experiments...

In this paper,pulsed field gradients are used to suppress the rapid-pulsing artifacts.Due to its superior homospoil charactersitic,pulsed field gradients offer an important method for removal of artifacts when data is being acquired fast compared to the relaxation times of the nuclei under study.The experimential results show that the quality of DQF-COSY spectra can be improved by the modified pulsc sequence,and the pulsed field gradients provide a good method for ultra-rapid acquisition 2D COSY-like NMR experiments with suppression the repetition rate artifacts.

脉冲梯度场基础上研究了进一步缩短COSY类2DNMR实验数据采集时间的新方法.利用主动屏蔽梯度场线圈的梯度场恢复时间仅为100μs数量级这一特点,提出一类基于脉冲梯度场消除弛豫假峰的脉冲序列.并以DQF-COSY脉冲序列为例加以验证.实验结果表明:采用文中的方法,取序列重复时间远小于T_1和T_2是切实可行的;梯度场技术能很好地抑制弛豫假蜂以达到2DNMK数据的快速采集.

-space imaging based on pulsed- gradient spin echo method has been applied tostudy the diffusion of water molecular and structure of flber cell in the chicken lens.Results show diffraction-like pattenis corresponding to the diffusion lengths of watermolcular at 12 pm, 7.9 μm, 5.2 μm and 3.6 μm which may be correlated to tbe structureof fiber cell in lens.

在核磁共振中的脉冲梯度自旋回响法(pulsedgradientspinecho,PGSE)常用来测量溶液中分子或离子的扩散现象,近年来利用PGSEq空间法对多孔隙物质的系统扩散研究。观察到类似绕射效应,在此工作中我们尝试以q空间法直接观察眼球水晶体中的纤维细胞组织和水分子扩散间的关系,实验结果显示,从类似绕射纹图可了解纤维细胞蜂巢式排列结构。

The new developments of Nuclear Magnetic Resonance Spectrometers and the major features of variouscompanies'spectrometers are introduced. The advance in superconductive magnet,data system,pulsed field gradients,new probesand microimaging are introduced in more detail.

本文介绍了核磁共振仪的最新进展和各国仪器主要技术特点。对超导磁体、数字系统、脉冲梯度场、新式探头以及微成象等方面的发展作了较详细的介绍。

 
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