Decay curves of metastable fragment ions is also obtained by means of ion energy loss scans spectroscopy. 利用离子能量损失扫描谱,得到亚稳态碎片离子的衰变曲线。
A study of kno scaling of helium fragment distribution in high energy heavy ion collisions 高能重离子碰撞中氦碎片分布的KNO标度无关性研究
By means of improved RAPD method, random fragment polymorphism amplification of genome DNAs of the Arabidopsis thaliana plants grown from N+ ion implanted seeds was done with 11 primers, 4 of which amplified differential fragments. 用改良的RAPD技术对N+离子注入种子植株的DNA进行11个引物的随机片段多态性扩增。
Both IBA and JA standard chemicals showed almost same changes of mass spectrum pattern. Optimum drift voltage for most intensity was 60 V, as drift voltage increased, the intensity of molecular ion peak decreased and the fragment ion peaks shifted to smaller m/ z one. IBA和JA的标准试剂显示了相同的质谱图形变化,在60V时能得到最强分子离子峰,当电压继续升高时分子离子峰的强度逐渐减弱,并出现一些m/z更小的碎片离子峰。
The [ M-68] fragment ion probably results from a rearrangement of three hydrogens. 7哌嗪8N喹诺酮酸具有[M-68]特征离子,可能是来自三氢重排的结果。
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。
Studies on the fragmentation of diterpene quinones related to tanshinone under electron impact& the observation of an unusual ( m-o) fragment ion 一些丹参醌类二萜醌在电子轰击下的裂解反应&关于一种不常见的(M-O)碎片离子的观察
In APCI/ MS the structures of small molecular drugs and CID voltage affected their molecular ion peaks and fragment ion peaks obviously. 此外,还给出了丰富的碎片峰;小分子药物的结构与CID电压对APCI/MS的分子离子峰及碎片离子丰度有明确的影响。
Results The purity of Fab fragment purified by ion exchange column chromatography reached more than 90%. However, after further purification by Sephacryl-100 chromatography, the purity reached more than 99%. The total recovery rate of Fab fragment reached more than 80%. 结果纯化的重组Fab抗体的纯度可达90%以上,经Sephacryl-100进一步层析后,纯度达99%以上,总收率可达80%以上。
The fragment pathways of nine kinds of triterpene glycosides from sea cucumbers has been investigated in negative ion mode by electrospray ionization-time of flight-mass spectrometry ( ESI-TOF-MS). 采用电喷雾飞行时间质谱技术(ESI-TOF-MS),在负离子检测方式下,对9种皂苷化合物的质谱裂解途径进行了研究。