RESULTS A compound was isolated and its structure was identified by nuclear magnetic resonance spectroscopy and mass spectrometry as4-hydroxy-3-methoxy benzaldehyde. 根中分离得到一个化合物,经核磁、质谱、紫外和红外光谱法鉴定为4-羟基-3-甲氧基苯甲醛。
Spectroscopy measurements ( Fourier transform infrared differential spectroscopy, Carbon-13 nuclear magnetic resonance spectrometry, Matrix-assisted laser desorption/ ionization-time of flight mass spectrometry) were performed to study the humic acids in the soil applied with corn stalk. 采用红外示差光谱、13C-核磁共振波谱和激光解吸质谱对玉米秸秆施入土壤后土壤胡敏酸(HA)的谱学特征的动态变化进行了研究。
Its structure has been characterized by elemental analysis, fast atom bombardment mass spectrometry ( FABMS), infra red absorption spectrometry ( IR) and1H nuclear magnetic resonance spectrometry, etc. 通过薄层色谱、元素分析、快原子轰击质谱、红外光谱、核磁共振谱对合成产品进行了结构表征。
Structural analysis of petroleum aromatic fractions by proton nuclear magnetic resonance spectrometry 质子核磁共振对石油芳烃馏分的结构分析
One of the best separated component would be confirmed as 4 pentenyl glucosinolate by means of mass spectrometry, nuclear magnetic resonance spectrometry, ultraviolet spectroscopy and infrared spectrometry. 对其中分离较好的一个组分经液质联用、核磁共振、红外及紫外等方法确定其结构为4戊烯基硫苷。
The synthesized product was analyzed and characterized by thin-layer chromatography, elementary analysis, mass spectrometry, infra-red absorption spectrometry, nuclear magnetic resonance spectrometry and visible absorption spectrometry etc. 用薄层色谱法、元素分析法、质谱法、红外吸收光谱法、核磁共振谱法和可见吸收光谱法等分析手段对产品进行了分析和结构鉴定。
Objective To analysis the hypoxia stress peptied ( HSP) with the nuclear magnetic resonance ( NMR) and the mass spectrometry ( MS) and the fourier transfor infrared spectrometry ( FTIR), and to get the structure character of the HSP. 目的利用核磁共振仪、质谱仪、红外光谱测定仪等仪器对低氧应激肽进行谱学分析,获取该物质本身的结构特性。
Diethylstibestrol-4-Carboxymethyl ether was synthesized through chemical method in this paper, and was identified by nuclear magnetic resonance ( NMR) and mass spectrometry ( MS). 通过化学方法合成己烯雌酚单羧甲基醚,并通过核磁共振和质谱进行鉴定;
13C-labeled metabolites can be monitored throughout the metabolic system and their distribution in certain metabolites can be measured either by two-dimensional nuclear magnetic resonance ( 2D NMR) or by gas chromatography/ mass spectrometry ( GC-MS). 碳-13标记的代谢物可以在整个代谢系统中被追踪和监控,它们在某些代谢产物的分配可以由二维核磁共振(2DNMR)或用气相色谱/质谱法(GC–MS)的测定。
However, the relationship between mass spectrometry and molecular structures of compounds is very complex, when compared with the nuclear magnetic resonance, the information providing by mass spectrometry is very less. 但是,化合物的质谱与其分子结构的关系相当复杂,而且与核磁共振相比,质谱所提供的结构信息相对较少。