When a focal mass lesion was detected on MRI, and the spectroscopy showed marked decrease of NAA/Cho, NAA/Cr and Cr/Cho rations, either astrocytoma or glioblastoma should be highly considered.
当磁振造影检查在颅内侦测到局部肿块病灶时，若频谱分析术发现NAA/Cho比明显的降低，以及NAA/Cr及Cr/Cho比亦为降低时，多形神经胶母细胞瘤或是星状细胞瘤肿瘤必须要高度怀疑。
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. ChinaThermal decomposition of hexanitrohexaazaisowurtzitanewas studied bymass spectroscopy with low impacting electron energy. Non-isothermal kinetics treating method for ion curves in mass spectroscopy was established. The mechanism of HNIW thermal decomposition was analyzed according to the Arrhenius curves of ion products.
采用低能电子轰击质谱研究了六硝基六氮杂异伍兹烷的裂解过程，建立了质谱中离子强度曲线的非等温动力学处理方法，根据产物离子的Arrhenius曲线解释了HNIW热分解的机理。
By coupling high-performance liquid chromatography with ultraviolet absorption spectroscopy and atmospheric pressure chemical ionization mass spectrometry.
在富勒烯化学蓬勃发展的同时，有关小尺寸碳簇，特别是与富勒烯C〓密切相关碳簇的研究也得到了进一步的深化。
Contents of total phenolics and extractable condensed tannins in Prunus salicina Lindl. fruits were determined. Type of condensed tannins, degree of polymerization and distribution of polymer were characterized by matrix-assisted laser desorption-ionization time-of-flight mass spectrometry (MALDI-TOF MS) and nuclear magnetic resonance spectroscopy. The effects of tannins from P.
对李子果肉的总酚含量与可溶性缩合单宁含量进行了测定，并利用基质辅助激光解吸附离子化飞行时间质谱(MALDI-TOF MS)联合核磁共振技术详细研究了李子果肉单宁的类型、聚合度及平均分子质量。
The spectroscope is a non-stop of the beam type. with quite sensitive, even one nucleus can be measured, set-up that is a beam diagnosis reliable instrument for the cooling beam in ESR, now it becomes a precise mass spectroscope for nuclear reaction and nuclear spectroscopy study.
该谱仪为非阻挡型极灵敏的，甚至可测出一个裸核的测量设备，是冷却存储环束流诊断的可靠仪器，又是一台作核反应和核谱学研究的精密质量测定的谱仪。
Kinetics and mechanism of hypophosphite oxidation on a nickel electrode were studied by means of the electrochemical mass spectroscopy and kinetic model analysis.
用电化学质谱和动力学模型分析等方法研究了次亚磷酸根在镍电极上的电化学氧化机理和动力学。
The segregation of boron and its effect were studied in high purity iron with sulfur of 6×10-5 mass fraction and were investigated by scanning Auger electron spectroscopy, tensile test at low temperature and SEM observation of fractured surface.
利用俄歇能谱微区分析、低温拉伸试验和SEM断口观察，研究了微量硼在高纯铁-6×10-5硫合金中的沿晶偏析及其对硫沿晶偏析和硫偏析引起的低温沿晶断裂的影响。
The carceplex 1 is very stable, which remains intact in air and water, and even under the conditions necessary for mass spectroscopy.
超分子笼1在空气和水中具有高度的稳定性，并且在MALIDY-TOF的测试条件下NEt〓仍然稳定地存在于超分子笼中，因而是一个典型的囚笼复合物。
The load carrying capacity and antiwear property of S, P containing benzotriazole derivative (BM 3) were evaluated using a four ball test machine, and compared with those of zinc salt di(T 202) and amine salt of complex ester thiophosphate (T 307). The antiwear mechanism of BM 3 were studied by investigating the chemical states and the mass fraction of elements on the rubbed surfaces using X ray photoelectron spectroscopy and electron probe microanalysis and the thermal decomposition products using gas chromatography mass spectrograph.
在四球机上对照评价了含硫、磷苯并三氮唑衍生物（BM－3）和二丁辛基二硫代磷酸锌（T202）及硫磷酸复酯胺盐（T307）的承载能力和抗磨性能，用X射线光电子能谱仪和电子探针微分析仪等对磨斑表面元素N，S和P的存在形式及表面膜的组成进行了分析，用气相色谱－质谱联用仪对BM－3的热分解产物进行了分析，并且还对其极压抗磨作用机理作了探讨。
Scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Raman spectroscopy and secondary ion mass spectroscopywereused to characterise the as grown films.
进而研究了在系统中添加少量的氢气对于纳米金刚石薄膜的微观结构(石墨杂质含量、金刚石晶粒尺寸、N掺杂浓度等)的控制。
Secondary ion mass spectroscopy and scanning electron microscopy were used to determine the thickness of the Ti interlayer.
钛介层的厚度透过二次离子质谱仪与扫瞄式电子显微镜的分析结果而推定。
The structure of all products will be confirmed by Fourier transform infrared spectroscopy, Gel-Permeation Chromatography, mass spectroscopy, nuclear magnetic resonance spectroscopy.
利用FTIR、GPC、MS、1H-NMR和31P-NMR进行产物之结构鉴定。
The Ge surface segregation depends on the state of oxidation according to the analysis of second ion mass spectroscopy and x-ray photoelectron spectroscopy.
材料表面的组分变化情况、氧化情况对材料的性能有重要的影响，本文利用SIMS和XPS手段对我们生长的SiGe合金的表面进行了研究。
The toxic metabolite was determined as brefeldin A based on nuclear magnetic resonance techniques and fast atom bombardment mass spectroscopy.
药用植物法夏内生真菌D126，当进行液体培养时能产细胞毒活性物质，经核磁共振氢谱、碳谱和快原子轰击质谱确定，该物质为布雷菲德菌素A。
Northwest Science and Technology University of Agriculture and Forestry, Shanxi, Yangling 712100, Shanxi, China Abstract: Gas chromatography-mass spectroscopy analysis was conducted on the primary ingredient of metribuzin technical as well as its primary impurities, in conjunction with metribuzin synthesis methodology.
西北农林科技大学，陕西杨凌 712100 摘要：采用气相色谱-质谱联用对嗪草酮原药主成分及主要杂质进行分析，结合嗪草酮原药合成工艺，确定了3个主要杂质的结构和含量。
Distribution and coordination environment of lanthanum in internodal cells of Chara have been determined by inductively coupled plasma-mass spectrometry and X-ray absorption spectroscopy.
利用电感耦合等离子体质谱和X射线吸收谱研究了稀土元素镧在轮藻节间细胞中的分布和配位环境。
Electron cyclotron resonance plasma; fluorinated amorphous carbon film; mass spectro- metry; optical emission spectroscopy
电子回旋共振等离子体；氟化非晶碳薄膜；四极质谱；发射光谱
The effect of the different techniques on the structure and properties of the material were studied with cross-section transmission electron microscope, secondary ions mass spectrometry, X-ray Photoelectron Spectroscopy and electron paramagnetic resonance.
利用截面透射电镜、二次离子质谱、X光电子能谱及电子顺磁共振等手段研究了SIMON和注氮改性工艺对材料结构及性能的影响。
In this thesis, we systematically investigated the synthesis of oriented diamond film, nano-diamond film, boron-doped diamond film and AIN/diamond film using chemical vapor deposition. The parameters for the growth of these novel diamond films were studied. By means of Raman spectroscopy, scanning electron micrograph, energy dispersive X-ray analysis, X-ray diffraction and secondary ion mass spectrometry, we analyzed the characterization and structure of these new diamond films. In conclusion, we have completed the fundamental investigation and prepared some new diamond film devices: the field-emission device of nano-diamond film, the electrical hardness measurement device of high boron-doped diamond film, high boron-doped diamond film electrode and the high-frequency surface acoustic wave filter of AIN/diamond film.
本论文系统研究定向金刚石薄膜、纳米金刚石薄膜、掺硼金刚石薄膜和AlN/diamond复合膜等新型CVD金刚石薄膜，详细阐述了这几种新型金刚石薄膜制备过程和生长参数控制，并利用拉曼光谱、扫描电镜、X射线特征能谱和X射线衍射仪以及二次离子谱等分析手段对薄膜的性质结构进行了分析，完成了新型金刚石薄膜的基础研究，并制备了性能优秀的薄膜器件：大面积纳米晶作为场发射器件；掺硼金刚石薄膜电子硬度计压头和新型掺硼金刚石薄膜电极；AlN/diamond复合膜表面声波滤波器。
Transmission Electron Microscopy, Secondary Ion Mass Spectrometer and X-ray photoelectron spectroscopy have been used to analyze formation of the cobalt-silicide nanocrystals. In addition, the structure formed by co-sputtering the Co target with SiO2, Si3N4 target and Al2O3 target have also been demonstrated in this work. The approach also shows good charge storage ability. The charge storage mechanism of various dielectrics has also been revealed by related material analysis.
此外，我们亦研究透过共同溅镀金属钴和介电质材料如氧化矽，氮化矽及氧化铝作为储存层，透过电性量测，该结构亦展示不错之载子储存效果，除电性量测外亦透过相关之材料分析X光光电子能谱仪探讨在不同介电质材料之间的形成机制。