碱

The method is simple,rapid and suitable for the determination of three alkaloids in total alkaloids exfracted from L. plumule .

本法简单、快捷、适合于测定莲子心中莲心碱、异莲心碱、甲基莲心碱的含量。

Two different lines of evidence support the view that a base pair is composed of one purine and one pyrimidine.

有两方面的证据支持在DNA分子的螺旋构型中，每一个碱基对中都含有一个嘌呤碱基和一个嘧啶碱基

What evidence do we have that in the helical form of the DNA molecule the base pairs are composed of one purine and one pyrimidine?

我们有什么证据表明在 DNA 分子的螺旋构型中，在每一个碱基对中都含有一个嘌呤碱基和一个嘧啶碱基？

Semiconservative replication :The two strands of DNA double helix are separated, each strand serves as a template for the synthesis of a new complementary strand, producing two daughter molecules. Each daughter molecule has one parental strand and one newly synthesized strand.

半保留复制： DNA 生物合成时，母链 DNA 解开为两股单链，每股单链分别作为模板，以 dNTP(dATP 、 dGTP 、 dCTP 、 dTTP)为原料，按照碱基配对(A － T 、 G － C)规律与模板上的碱基配对，经依赖 DNA 的 DNA 聚合酶催化，合成一条与模板互补的新链，新形成的两个子代 DNA 与亲代 DNA 碱基序列一致，子代 DNA 分子中一股单链是从亲代完整地接受过来，另一股单链是新合成的，故称为半保留复制。

Furthermore, a biogenesis-based synthesis of CET was developed, which realized the plausible biogenetic transformation by a transannular reductive skeletal rearrangement of cyclic amino enone 45 to key ring skeleton of CET under mild condition directly.

化合物17经Wacker氧化、环化得到重排前体不饱和酮45，45在温和的还原条件下重排得到三尖杉碱五环骨架化合物34，从而实现了三尖杉碱的全合成。第二条路线较前一条步骤更短，合成更方便，收率更高（从二酯化合物8计合成三尖杉碱的总收率可达10％）。

AIM: To observe the effect of solanine on the contents of caspase-3 and Bcl-2 in HepG2, and to explicate the mechanism by which solanine induces the apoptosis of tumor cells. METHODS: Laser confocal scanning microscopy and Western blot were used to measure the contents of caspase-3 and Bcl-2, and LCSM was used to determine their locations in the cell. RESULT: Solanine markedly increased the content of caspase-3 while decreasing that of Bcl-2 in HepG2, both in a dose-dependent way.

目的：观察龙葵碱对HepG2细胞内caspase-3及Bcl-2蛋白含量的影响，阐明龙葵碱诱导肿瘤细胞凋亡的作用机制方法：采用激光共聚焦扫描显微术和Western blot法检测caspase-3和Bcl-2蛋白含量，并对二者在细胞内的位置进行定位结果：龙葵碱能够显著升高跳西2细胞内caspase-3蛋白含量，降低Bcl-2的含量，并且均具有剂量依赖性。

Keywords Capillary electrophoresis;on-line sweeping concentration;hollow fiber-based liquid-phase microextraction;fluorescence spectroscopy;interaction;serum albumin;Strychnos alkaloids;fangchinoline;tetrandri

毛细管电泳；在线推扫富集；中空纤维液相微萃取；荧光光谱法；相互作用；血清白蛋白；马钱子碱；防己诺林碱；粉防己碱；槲皮素；卡马西平；甲基多巴；左旋多巴

The sequences of segments of the trnL intron from 29 species and trnL-trnF IGS from 21 species of Magnoliaceae were analyzed. The results from the strict consensus trees were consistent with the former systems ① several species within the genera Michelia were homologious;② the subgenera Yulania was extremely homologious and much far from subgenera Magnolia;③ the species within Manglietia were highly conservative.

通过木兰科29个种的trnL基因内含子的525个碱基序列及21个种的trnL-trnF基因间隔区的370个碱基序列测定和分析，构建的严格一致性树建议：①含笑属为相对一致的单系类群；②玉兰亚属的几个种形成一个单系类群，与木兰亚属的几个种无共衍位点；③木莲属为个相对保守的类群，种间碱基差异很小。

Alkaline granitoids include alkaline and peralkaline granite, its associated katnosite and quartz syenite, and its associated and compositionally_similar alkali feldspar granite and rich_alkali meta_aluminous granite.

碱性花岗岩类包括碱性和过碱性花岗岩及与之伴生的英碱正长岩、石英正长岩，以及与之伴生并且成分相近的碱长花岗岩和富碱的偏铝质花岗岩。

In this paper,the effects of pH,concentration of buffer and triethylamine in mobile phase on chromatographic behavior of oxymatrine,sophoridine and matrine were studied by using ion exchange chromatography and their mechanisms were discussed.

采用离子交换色谱法，以氧化苦参碱、槐定碱、苦参碱3种生物碱为对象，研究了流动相pH、缓冲液浓度及三乙胺加入量等色谱条件对生物碱色谱行为的影响，并探讨了其作用机制。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。