哌嗪

Morphologic change was observed with photomicroscopy and fluorescent microscopy.

普通光学显微镜及荧光显微镜观察榄香烯哌嗪对HeLa细胞形态的影响，利用流式细胞仪检测HeLa细胞凋亡及细胞周期变化情况。

Not long ago , it was found that levocetirizine displayed a better pharmacological profile than the racemic mixture .

但其它的二苯甲基类哌嗪化合物情况如何并不知道。

So, there is an especial significance in the case of energy sources shortage and huge energy consumption nowadays. Based on reaction mechanism of alkanolamines with acid gases in this work, selective absorption of H_2S from mixed-gas streams into the aqueous solution of blended amines of MDEA-TBEE has been studied using a static and a dynamic evaluation setup, respectively. TBEE, a severe sterically hindered amine, was added into MDEA to form the blended amines.

开发高效活化剂是酸性气体吸收领域重要的研究方向之一，研究工作采用一乙醇胺为原料，氢气为反应氛围，低压下有机气相通过管式催化反应器合成活化剂哌嗪，考察合成催化剂组成和操作参数对合成反应的影响；将合成产物应用于膜吸收装置和再生装置上考察其吸收和解吸CO_2的性能。

The effect of characteristics, including concentration and flow velocity of absorbent and feeding gas, on the CO_2 absorption process has been widely investigated. And the active materials of different concentration, including Potassium phosphate tribasic、 Potassium tetraborate、 N-methyldiethanolamine、 2-Amido-2-methyl-l-propylacohol and Piperazine, were added in the absorbent, of which the effect has also been investigated.

主要考察了气液流速及其浓度等操作参数对CO_2吸收性能的影响；同时研究了在氨基酸盐吸收剂中添加各种活化剂，包括磷酸钾、硼酸钾、N-甲基二乙醇胺、2-氨基-2-甲基-1-丙醇和哌嗪对CO_2分离效果的影响；并对膜组件运行的稳定性进行了初步考察。

The results from the model are in good agreement with the experimental data. Potassium phosphate tribasic、 Potassium tetraborate、 and Piperazine are of obvious active affection for enhancement foctor, where N-methyldiethanolamine and 2-Amido-2-methyl-l-propylacohol are negative ones in all additives.

在反应增强因子的研究方面，其模型计算值与实验值符合较好；复合吸收剂体系中，活化剂N-甲基二乙醇胺和2-氨基-2-甲基-1-丙醇对增强因子起了消极影响，活化剂磷酸钾、硼酸钾和哌嗪对增强因子则具有明显的促进作用。

The results from the model are in good agreement with the experimental data. Potassium phosphate tribasic、Potassium tetraborate、and Piperazine are of obvious active affection for enhancement foctor, where N-methyldiethanolamine and 2-Amido-2-methyl-1-propylacohol are negative ones in all additives.

在反应增强因子的研究方面，其模型计算值与实验值符合较好；复合吸收剂体系中，活化剂N-甲基二乙醇胺和2-氨基-2-甲基-1-丙醇对增强因子起了消极影响，活化剂磷酸钾、硼酸钾和哌嗪对增强因子则具有明显的促进作用。

Replacing DETA with PIP, a new three dimensional compound 3 issynthesized and the 3D anionic framework of compound 3 is constructed from twodistinct motifs, a one-dimensional tancoite chain and a single 4-ring (S4R) unit,which contains four intersecting channels running throughout the structure as 8,12-member ring channels along to the a axis and 12-member ring channels along theb and c axis, respectively.

其中，以乙二胺为模板剂的亚磷酸铟微孔化合物具有无限的共边4员环一维链状结构；以哌嗪和1，6-己二胺为模板剂合成出的亚磷酸铟化合物分别具有二维交叉8员环孔道和16员环孔道的三维开放骨架结构。

Methods: Eleven B-CLL patients were studied. Leukemic lymphocytes with (n=8) or without (n=3) P2z receptors were exposed in vitro to ATP, benzoylbenzoic-ATP, 2-methylthio-ATP(2MeSATP), adenosine-5′-［γ-thio］ triphosphate, and other nucleosides for 8h. Apoptosis was detected by electron microscopy, agarose gel electrophoresis, and quantitative TdT assay. Results:Apoptosis was detected only in leukemic lymphocytes with P2z receptors. By using the quantitative assay, ATP-inducing DNA strand breaks were found to occur specifically for BzATP, ATP and 2MeSATP, but not for ATP-γS and other nucleosides.

将表达P2z受体［P2z］与不含P2z受体［P2z］的两组CLL细胞分别同1.0mmol/L三磷酸腺苷体外培养8小时，以电镜、DNA凝胶电泳和定量DNA 3′端TdT法检测细胞凋亡；并对ATP、苯甲酰苯甲酸ATP、2-甲基硫ATP(2MeSATP)、γ-硫代ATP及其它核苷的诱导效应和氧化型ATP、1-［N，O-二(5-异喹啉碘酰基)N-甲基-L-酪氨酰］-4-苯哌嗪KN-62）的抑制效应做定量研究。

This paper reviewed the research progress of diketopiperazines found in the marine microbial metabolites, and the future study trends was discussed and outlooked.

本文综述了近年来二酮哌嗪类化合物在海洋微生物代谢产物中的研究进展，并对其研究方向进行了讨论和展望。

Continuous growth of dendrons from G1.5 to G4 at the both ends of PSt chains was carried out by the iterative Michael addition reactions with excess PZ and following TT. Structures of the triblock polymers were characterized by GPC and ~1H NMR spectra.

随后，聚合物链末端反复用过量的哌嗪和TT进行迈克尔加成反应，使树枝状聚酰胺胺嵌段不断增长，得到G1.5到G4的嵌段共聚物。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。