mass spectra

Successive Rearrangements in Mass Spectra of Noncyclic Polyethers

非环多醚化合物质谱碎片的连续重排

In this paper EI Mass Spectra of five 7-Piperazing Quinolones were measured.

本文报导了五种7—哌嗪喹诺酮类化合物的EI谱,并讨论了特征碎片离子的裂解规律.

According to their UV and mass spectra, 5 of them were preliminarily identified as SAL, DKF, ESF, STVL, FESF.

收集一维馏分,离线注入LC-MS, 鉴定出其中含有SAL 、 DKF 、 ESF 、 STVL及FESF5个小肽.

Multiphoton ionization ( MPI) mass spectra distributions of tetramethylsilane in gaseous phase are investigated using a quadrupole mass spectrometer and a pulsed molecular beam at 355 nm laser radiation.

在355nm的激光作用下，利用扩散分子束技术和四极质谱装置相结合研究了气相Si（CH3）4分子多光子电离（MPI）质谱分布。

Interpretation time of flight mass spectra by calculation intensity of isotope peaks

任意分子同位素丰度的计算及其在飞行时间质谱归属中的应用

Here a novel approach was developed to scoring tandem mass spectra against a peptide database, in which fragment ion probabilities, number of enzymatic termini of candidate peptides, matching quality and match pattern between experimental and theoretical spectrum were considered.

该算法综合考虑了串联质谱中不同离子出现的概率、多肽的酶切位点数、理论离子与实验离子的匹配程度和匹配模式。

Component qualitative analysis was performed by GC/ MS method and compared with the standard mass spectra in NIST library.

组分的定性依靠GC/MS联用技术和NIST谱库标准质谱图对照分析。

Database Construction of GC Retention Index and Correction of Mistakes in Database A method is discussed for identifying the nitrogen heterocyclics by using GC retention data, mass spectra and MS library search results.

构建色谱保留指数数据库及数据错误查找探索了色谱保留值与质谱信息相结合的定性分析方法。

PPre_ITMS: Tandem mass spectra preprocessing system based on machine learning

pPre ITMS：基于机器学习方法的串联质谱数据预处理系统

Negative ion chemical ionization mass spectra of several types of glycosides

若干糖苷类化合物的负离子化学电离质谱研究

Two new multibranched chromophores, named as NO-G2 and BO-G2, with the same peripheral branch of oxadiazole-unit, but different molecular core, that is, carbazole for NO-G2 and benzonitrile for BO-G2, were synthesized and characterized by mass spectra and 1H NMR spectra, respectively.

选择恶二唑基团作为多枝化合物的枝，以苯甲腈基和咔唑基团为分子的核，合成了两个四枝化合物（BO-G2和NO-G2），进行了核磁共振和质谱的表征。

The paper introduced obtainable way, mass spectra identification mode and application in toxicant analysis of this software.

文中简要介绍了该软件的引入途径、质谱鉴定方式和在毒物分析中的应用方法，推荐各有关实验室应用。

DPT with 15 N atoms were characterized through 15 N NMR spectra and Mass spectra.

给出了有15N标记的DPT分子 的15N-NMR和MS测定结果.

A Computer System for Searching the Mass Spectra of Indole Alkaloids

吲哚生物碱的质谱数据检索系统

The electron impact and field desorption mass spectra of 10 2,4-diamino-6-substituted quinazoline sulfonamides were investigated.

研究了10种2,4-二氨基-6-取代磺酰胺喹唑啉类药物的电子电离及场解吸质谱。

Their Mass Spectra show that they are dimers in gas phase.

质谱研究表明这些配合物均以二聚体的形式存在.

In this paper, the mass spectra of petrol vapor using the precursors of the H3O+, NO+ and the quantitative analysis results of the compounds in the petrol and diesel vapors are also presented.

文中还给出了以H3O+、NO+为初始离子所得到的汽油蒸汽的质谱图，以及汽油、柴油蒸汽中各种成分的定量分析结果。

Methods Analysis methods of the components was carried out by gas chromatogram and mass spectra ( GC/ MS) and its genotoxicity was studied by sex linked recessive lethal ( SLRL) test in drosophila.

方法应用气相色谱质谱联用仪（GC／MS）分析家庭厨房吸油烟机油杯中冷凝油的总化学成分，并采用果蝇伴性隐性致死试验（SLRL）对化学成分的遗传毒性进行了研究。

Study on Field Desorption Mass Spectra and Desorption Electron Impact Mass Spectra of Four New-type Gunpowders

美托拉宗的电子轰击质谱研究四种新型火药的场解吸和解吸电子轰击质谱研究

UV Laser MPI Spectra and TOF Mass Spectra of Tetramethylsilane

紫外激光作用下四甲基硅的MPI光谱和TOF质谱研究

The mass spectra of ferrocenyl-� �-diketonate chelates of Ti, Zr, Hf ( 1-6 ) and substituted ferroceoyl-titanocene complexes ( 7-8 ) have been inves-tigated.

本文研究了钛 、 锆 、 铪的二茂铁基β - 双酮螯合物 ( 1～6 ) 和取代的二茂铁基钛茂络合物 ( 7～8 ) 的质谱.

Laser multiphoton ionization mass spectra of Fe ( CO) 5 were studied at 355 nm, 632 nm and 355nm+ 532nm, with a supersonic molecular beam and a time-of-flight mass spectrometer.

利用超声分子束、强激光多光子电离和飞行时间质谱探测装置研究了Fe（CO）5分子在355nm、532nm和355nm+532nm单、双色激光作用下的多光子电离质谱。

Spectra Matching and Pattern Recognition Technique for Computer Elucidation of Mass Spectra

计算机辅助质谱解析的谱图匹配和模式识别方法

Mass spectrometry by analysis ionization. When ion through electric field or magnetic field. Different mass to charge ratio ions will be separated and detected, and collect by the detector. After series of dada processing, finally obtained mass spectra.

质谱通过将被分析物质电离成离子，产生的离子经电场或磁场作用，按质荷比的不同而被分离和检测，被离子检测器的收集得到，再经过一系列数据处理，最终获得质谱图。