查询词典 LIF

Based on the previous literatures, the following major innovation works were carried out in this dissertation:(1) The derivatization reaction conditions of ephedrine and pseudoephedrine with sensitive derivation reagent in aqueous system were studied and two new methods were developed for the assay of them by microemulsion electrokinetic chromatography and micellar electrokinetic chromatography with LIF detection. The sensitivity and analysis times were greatly improved compared with the previous reports;(2) A new method of CZE with indirect LIF detection was developed for the simultaneous determination of six coumarin compounds (esculin, esculetin, isofraxidin, genistein, naringin and sophoricoside) with fluorescein as the probe. The proposed method enlarges the application range of LIF detector, and provides new approach for the analysis of certain compounds difficult to derivatize;(3) Based on the above research, an MEKC with indirect LIF detection method for the simultaneous determination of adenine and guanine in DNA extracts from fungus, maize and soybean was established;(4) A new method for the investigation of the complexes formed between human serum albumin and ampicillin sodium under the simulated physiology conditions using laser light scattering technique was developed.

该论文在综述前人工作的基础上，开展了如下未见文献报道的创新性的研究工作：(1)使用灵敏的衍生试剂对麻黄碱和伪麻黄碱在水体系中的衍生反应条件进行了系统研究，建立了微乳电动色谱-激光诱导荧光检测法和胶束电动色谱—激光诱导荧光检测法测定麻黄碱和伪麻黄碱的灵敏分析新方法，与以前的报道相比，灵敏度和分析时间均有很大改善；(2)使用荧光素钠作为背景荧光试剂，建立了同时分析测定六种黄酮类化合物(秦皮甲素、秦皮乙素、异秦皮定、染料木素、柚皮苷和槐角苷)的毛细管区带电泳—间接激光诱导荧光检测新方法，扩大了激光诱导荧光检测的应用范围，对难衍生化合物的分离分析提供了一种新思路和新途径；(3)以荧光素钠作为背景荧光试剂，建立了一种用于同时测定食品提取DNA中的腺嘌呤和鸟嘌呤含量的胶束电动色谱—间接激光诱导荧光检测新方法；(4)用动态和静态激光散射法研究了模拟生理条件下人血清白蛋白与氨比西林钠盐相互作用所形成的复合物，为药物分子与蛋白质的相互作用、药代动力学等的研究提供了一种新思路。

Results:LIF improved the development rate of early embryo at the concentration of 0.1,1 and 10ng/ml(P.05).The enhanced effects of LIF were significant for morula and blastocyst stage,not for 1～8 cell stage of embryos.Conclusion:LIF may improve the development of early mouse embryos at the appropriate concentration.

结果：①0.1ng/ml、1ng/ml和10ng/ml浓度的LIF对小鼠早期胚胎的发育和胚泡的形成有促进作用，0.01ng/ml和100ng/ml浓度的LIF对胚胎的发育无明显影响；②LIF对小鼠早期胚胎发育的影响主要发生于桑椹胚和胚泡期，对1～8细胞期胚胎无明显影响。

Non-fluoride ionic number of Nd-F in dilute LiF-NdF3 melts and Nd-O-F species in dilute LiF-NdF3-Li2CO3 melts was researched by cryoscopic method,respectively.

采用冰点降低法分别研究了以LiF为溶剂的稀LiF-NdF3熔盐中Nd-F离子团及LiF-NdF3-Li2CO3熔盐中Nd-O-F离子团的非氟离子的个数。

The results from flow cytometry assay showed that the low concentrations of LIF had the ability to shift cytotrophoblast differentiation towards a syncytial pathway, while the high concentrations of LIF towards a invasive pathway.

细胞流式仪结果表明低浓度的LIF可促进绒毛合胞体滋养层的分化，高浓度的LIF可促进绒毛外侵入性滋养层细胞的分化。

Similar phenomena were observer for dolomite ,antigorite, LiF and SlO_2 single crystals.

大理石、南阳玉、LiF单晶、SiO_2单晶等暴露于氢气后，亦有类似的现象发生。

This is perhaps just as well, as the lif e of a farmer is far from easy, as Jim Doherty discovered when he set out to com bine being a writer with running a farm.

或许这也没有什么不好，因为，正如吉姆多而第当初开始其写作和农场经营双重生涯时所体验到的那样，农耕生活远非轻松自在。

It is important that rhGM-LIF can inhibit the growth of human liver cancer cell.

值得重视的是，融合蛋白对人肝癌细胞的生长也有明显的抑制作用。

Analysis on the LIF gene expression of decidua can be used as a index for diagnosis of the habitual abortion.

这些研究结果提示 LIF基因表达缺失或减弱，可能是导致原因不明习惯性流产的原因之一，妊娠早期子宫蜕膜LIF基因表达检测可作为诊断原因不明习惯性流产病因的指标之一。

The results showed that the level of LIF mRNA expression of the decidua in abortion group was 0.512±0.219,significantly lower ...

结果发现对照组LIFmRNA表达水平为 1.314± 0 。45 7，病例组表达水平为 0 。5 12± 0 。2 19，两组相比较，差异有极显著性(P 。0 1)。

Objective Constructing the eukaryotic expression vector of mouse LIF and conducing to improve the directional differentiation research of ES cell about other laboratory animals.

目的 构建小鼠白血病抑制因子的真核表达载体，有助于开展高其他实验动物的胚胎干细胞的定向分化研究。

He became prime minister in 1997 and won international acclaim for his role in the Northern Ireland peace process.

他在1997年成为总理，并且因为在北爱尔兰的和平进程中发挥的作用受到国际社会的赞许。

Mixed Page Sorting Method Using the cuttable user model, this thesis proposes a mixed page sorting method by using cutted user model in server-side and complete user model in client-side.

隐私分级利用的混合式页面排序方法针对个性化搜索中搜索结果排序的问题，本文利用隐私可控开放的用户偏好模型，提出一个在客户端和服务器端分步进行的隐私分级利用的混合式页面排序方法。