二十四烷

The reaction of condensation-cyclization of the two prepared compounds at 100 ℃ in the presence of anhydrous potassium carbonate gave 1,4,7,10-tetrakis(p-toluenesulfonyl)-1,4,7,10-tetraazacyclododecane,with a yield of 71%.

在无水碳酸钾存在下，100℃加热使所得两种磺酰化产物缩合环化得到1，4，7，10-四-1，4，7，10-四氮杂环十二烷，产率71.0%。

Objective To evaluate the diagnosis value of positive 99Tcm-4,9-diaza-3,3,10,10-tetramethyldodecan-2,11-dione dioxime (HL91) imaging using receiver operating characteristic curve for distinguishing the character of pulmonary neoplasms.

目的 探讨半定量分析及接受器工作特性曲线法在99Tcm 4 ，9 二氮3，3，10 ，10 四甲基十二烷2 ，11 二酮肟(HL91)肿瘤阳性显像鉴别肺部良恶性肿块中的价值。

The value of 4,9-diaza-2, 3, 10, 10-tetramethydodecan-2, 11-dione dioxime (HL91) tagged with 99Tcm on detecting the hypoxic brain tissue surrounding the hypertensive cerebral hemorrhage nidus, which represents the penumbra is still waited for confirmation.

采用99Tcm标记的缺氧显像剂4，9-二氮-2，3，10，10-四甲基十二烷-2，11-二酮肟(HL91)检测血肿周围可逆性损伤组织来反映半暗带是否可行，有待证实。

The macrocyclic polyamines are a kind of excellent ligands and have a substantially high binding affinity with transition metal ions. Macrocyclic polyamine metal complexes as enzyme models are widely used in chemical biology, medicine and gene therapy. 1, 4, 7, 10-tetrazacyclododecane is a representative macrocyclic polyamines compound and shows high binding affinity with transition metal ions, such as Zn, Cu and Co. Their metal complexes especially multinuclear complexes were widely used in DNA, RNA recognition.

大环多胺化合物是一类性质独特的优秀配体，具有良好的金属配位能力，其金属配合物作为人工酶模型广泛应用于核酸结构及功能研究、基因表达与调控、抗癌药物的研制等生物、化学和医学领域。1，4，7，10-四氮杂十二烷是典型的大环多胺化合物，对过渡金属离子Zn， Cu and Co有良好的配位能力，这些金属配合物特别是多核金属配合物被广泛应用于DNA识别中。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。