The mass spectra of ureide-type noncyclic polyethers with 2(3H)-benzoxazolone as end groups were studies.

研究了以2（3H）-苯并唑酮端基、具有酰脲构的非环多醚化合的质谱。

In this review,we described the recent development of mass spectrometry techniques for the study of peptidase structure and function in the central nerve system of Aplysia and other mollusks.

本文以海兔等软体动材,综述近年来采用质谱和高效液相色谱技术研究中枢神经系统多肽酶构与功能的进展。

The content of free acetic acid in cigarette smoke condensates was determined by GC-MS with isopropyl alcohol as the solvent and nonanol as the internal standard.

以异丙醇溶剂,壬醇内标,采用气相色谱-质谱法分析了卷烟烟气总粒相中的游离乙酸,乙酸测定的相对标准偏差小于1%,均回收率99。

Uranium isotope abundance ratio has been measured by total sample evaporation and signal integration,and a thermal surface ionization mass sepctrometry equipped with multicollector has been used.

采用全蒸发技术、离子流强度积分的方式,用多接收器热表面电离质谱计测量铀同位丰度。

The oils were analyzed by GC-MS and percentages were obtained by normalized peak areas, where main components are nootkatone, D-limonene, osthole, cis-linaloloxide, furfural, and trans.

用气相色谱-质谱(GC-MS)联用技术分析,鉴定出主要成分圆柚酮、D-柠檬烯、王草、顺式-芳樟醇氧化、糠醛、反式-芳樟醇氧化。

RESULTS The chlortetracycline's epimer, tetracycline and its epimer, as impurities in chlortetracycline have been determined by the liquid chromatogram and its first order mass spectrum.

到金霉样品液相色谱图以及液相色谱峰对应的一级质谱图。对谱图进行分析归纳,推测金霉样品中含有四环、差向异构四环和差向异构金霉杂质组分。

Based on these results and the ESI-MS data, the mechanism of sulfoxidation was proposed to be intramolecular nucleophilic oxygen transfer to a coordinated sulfide.

基于这些和电喷雾质谱(ESI-MS)数据，亚砜化反应的机理推测分子内亲核氧转移到络合的硫醚底上。

Desorption chemical ionization mass spectrometry of twelve metallohematoporphyrin complexes has been investigated under DEP condition using mixture of tetramethylsilane and methane as regent gas.

本文以四甲基硅烷／甲烷混合反应气，采用DEP技术，测定12个金属血卟啉络合的解吸化学电离质谱。

The controls were homeochronous inpatients with affective disorder and normal individuals.lsoprene breath levels were measured by gas chromatography combined with mass spectroscopy(GC-MS).

用气相色谱一质谱联用仪检测其呼出气体中异戊二烯的浓度。

In this paper ten lactonic crown ethers weresynthesized, of which seven were new compounds.Theirstructures were confirmed by EA,IR,1HNMR andMS analysis.

合成了10个内酯型冠醚化合，其中7个冠醚是新化合，其构均由元分析，及红外、核磁、质谱分析证实。

Besides, laser optoacoustic spectroscopy technique and laser mass spectrometry will play more important role in research of internal combustion engine.

另外，激光光声光谱技术、激光质谱仪等有望在内燃机的研究中发挥更大的作用。

Dodecanol abietate succinic anhydride was synthesized from abietic acid.The structures of products were characterized by spectrum of IR，HNMR and MS.

以枞酸起点，合成了十二醇酯琥珀酸酐，采用红外光谱、核磁共振波谱及质谱对中间产及终产进行了构表证。

The deleterious ingredients in gas emission of sculpturing organic glass were studied,using gas chromatography-mass spectrometry coupled with 3-step preconcentrator.

研究了3阶段预浓缩气相色谱-质谱法检测有机玻璃在雕刻过程中排放的有害气体的组成。

Objective:To develop a GC-MS approach for the determination of tripropyltin(TPrT),tributyltin(TBT) and triphenyltin(TPhT) in fish.

建立水产品中三丙基锡、三丁基锡和三苯基锡的气相色谱-质谱(GC-MS)分析方法。

The triphenylamine azo compounds were successfully characterized by matrix-assisted laser desorption-ionization time of flight mass spectrometry(MALDI-TOF MS).

利用基质辅助激光解吸电离飞行时间质谱法分析三苯胺偶氮化合。