查询词典 TOF

The results showed that the reaction condition was mild (70℃, 60 min). The derivatives could be directly detected by MALDI-TOF-MS without desalted procedure, avoiding lose of sample.

结果显示：衍生化方法反应条件温和(70℃反应60 min)，衍生物不用脱盐处理即可直接进行质谱分析，检测灵敏度高，避免了微量样品的损失。

In the high-temperature sintering process, the Cl and O2 anions are formed synchronously and during the following annealing process, the concentration of the encaged Cl anions are increased by anion-molecule reactions.

利用溶胶-凝胶自蔓延燃烧法制备C12A7 Cl-材料，运用多种表征手段对材料的结构和存储性质进行研究，同时利用TOF质谱对样品的负离子发射情况进行了测试。

Therefore, the author excogitates some synthesis courses of new compounds including selenium and aspirin based on medicament chemistry and coalition principle. The new compound is named 5-5'-diselenium monoacetyl salicylic acid and ascertained by IR ,UV and MALDI-TOF-MS, and its structure is: OOHThe compound is inhibiting to sarcoma and ascites tumour of white mice by pharmacology experiments, so it is worth researching deeply.

为此，本文运用化学拼合原理，提出了几种既含硒又含乙酰水杨酸的化合物新结构的合成路线，经过多次理论分析和探索试验，得到一种预测的新的化合物，命名为5-5′-二硒单乙酰水杨酸，经红外、紫外、飞行时间质谱测定，证明该化合物的结构为：经药理预试验表明，该化合物对小鼠S_(180)肉瘤和艾氏腹水型肿瘤均有抑制作用，具有深入研究的意义。

Its structure was determined by a combination of MALDI-TOF MS ana lyses, N-terminal Edman degradation and amino acid analyses. Amino acid sequenc e of VAPP was: N-terminus VLSAADKSNVKAAWGKVGGNAPAFGAEALLRM.

结合激光解析电离飞行时间质谱，N-端Edman降解和氨基酸分析结果表明，该多肽是由32个氨基酸残基组成的直链多肽，分子量3 216 u，主要含缬氨酸、丙氨酸、赖氨酸和甘氨酸，无半胱氨酸，其一级结构氨基酸排列顺序为：N端-VLSAA DKSNVKAAWGKVGGNA PAFGAEALLRM，与已知蛋白序列同源性远小于50%。

A novel method combining a conventional free-radical solution polymerization with a chemical saponification was used to synthesize a, cu-dicarboxyl terminated oligo s with molecular weight below 1500. Here, cn-carboxyl terminated oligo s were firstly synthesized by the free-radical polymerization in THF, where 4,4'-azobis(4-cyanovaleric acid) was used as initiator, thioglycolic acid as chain transfer agent, then CTBMA were transformed into di-CTBMA via saponifying CTBMA in dioxane/H_2O/KOH solution.

利用传统自由基聚合法，在四氢呋喃溶液中自由基引发聚合甲基丙烯酸丁酯单体而得到w-羧基-甲基丙烯酸丁酯低聚物(分子量在1500左右)；利用CTBMA 末端酯基的反应特性，在二氧六环／水／KOH混合溶液中皂化CTBMA，使之转化为a ，w-羧基甲基丙烯酸丁酯低聚物；研究了溶剂的类别、反应时间等反应条件对皂化产物结构的影响；利用MALDI-TOF-MS及LSIMS对皂化各阶段产物进行了分析监测。

Hybrid therapy for TOE with huge APCAs or post-operation residual shunts is safety, simply and effective.

Hybrid手术治疗伴巨大APCAs及术后存在残余分流的TOF安全、有效。

Most of water-soluble cyanine dyes have -SO3H and –COOH in their molecules, which will influence the biomolecules' functional characters. A new kind of water-soluble cyanine dyes with several cations in molecules were designed and synthesized, preparation conditions of intermediate and dyes were researched and optimized, the yield of dye is 25%. The novel kind of cyanine dye are water-soluble , spectrum characters was researched , all the dyes were charactered by 1H NMR and TOF-MS, spectrum in different solvent of novel dyes were focused on, one of the kind dyes show higher fluorescence quantum yield than the result reported. Because of several cations in the structure, it is promising when used in DNA assay and other bio-assay field.

大多数水溶性的菁类荧光染料分子结构中都带有-SO3H和-COOH等基团，过多的阴离子的引入容易造成对生物分子的功能属性的影响，本论文设计并合成了分子结构中带有多个正电荷的水溶性的一类新型菁染料，考察并且研究了中间体和染料的合成条件，最终的目标产物产率达到25％，染料通过了质谱和核磁的表征，新型的染料具有良好的水溶性，研究了新染料在多种溶剂的的光谱性质，其中一种染料的在水中的荧光量子产率比文献报道得到了提高，由于富集了正电荷，这类菁染料在DNA标记等生物中有一定应用前景。

Because of the bonded crown ring the catalytic activity of complexes can be improved and the induce period of the oxidation for p-xylene to p-toluic acid was shortened from～ 10h to 0.5～5h, the fashion and position of the bonded crown ring as well as the distance between the crown ring and activity center have distinct influence on the catalytic activity of complexes.

结果表明：1。键连的冠醚环均能显著提高催化活性，并大大缩短反应诱导期5-10h，使TOF从21～60提高到152～222，约增加了5～7倍；冠环的键连方式和部位以及与活性中心的距离对催化活性影响明显；2。

At 175 ℃ and 5.0 MPa, the oxidative carbonylation of aniline to the corresponding carbamates over these catalysts could be proceeded with a high conversion(96%), selectivity(99%) and 532 for TOF was achieved.

金催化剂作为一种新型的催化材料正日益引起人们的重视。

The photoionization dynamics of ammonia and benzene was studied by home-built femtosecond laser and TOF mass/photoelectron spectrometer.

报导了用自制飞秒激光器通过飞秒多光子电离质谱和光电子能谱对飞秒强激光场与分子相互作用的研究。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。