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The hydrogen-bonded dimer and trimer formed between 1,3,5-benzenetricarboxylic acid and bipyridine have been investigated using a density functional theory method and 6-31＋＋G** basis set.

使用密度泛函理论B3LYP方法和6-31++G**基函数对1，3，5-苯三甲酸与联吡啶形成的氢键二聚体和三聚体进行了理论计算研究。

A water-soluble porphyrin dimer containing eight positive charges, bridged by 4,4 -dicar- boxy-2,2 -bipyridyl, has been synthesized.

以4，4'-二羧酸-2，2'-联吡啶为桥联试剂，合成了一种含8个阳离子的水溶性桥联双卟啉。

The struture of compound 12 was determined by X-ray crystallography analysis. The molecule is centrosymmetric dimer and has a core of Sn-2O-2 unit.

通过对化合物的核磁共振谱、红外光谱、元素分析的研究，确定化合物的组成和结构及形成结构的原因。

The one electron oxidative splitting reaction mechanism between 9,10-anthraquinone-2-sulfonate and cyclobutane dimethylthymine dimer was acquired.

研究了蒽醌-2-磺酸盐与环丁烷型二甲基胸腺嘧啶二聚体发生的单电子氧化裂解反应机理。

On the basis of the photoreactivity, spectroscopy, and spectrometry data, we determined the structure of the new photoproduct to be a nonadjacent cis-anti cyclobutane dimer formed between T2 and T7 with the absolute stereochemistry depicted by structure I (Figure 8B).

结论根据photoreactivity、分光学和光谱数据，我们确定新的photoproduct的结构是nonadjacent同边反cyclobutane二聚体被形成在T2和T7之间以结构描述的绝对立体化学I (图8B)。

Keywords: DNA photoreactivation; CPD photolyase; tryptophan; electron transfer; cyclobutane pyrimidine dimer

中文关键词： DNA光复活；CPD光解酶；色氨酸；电子转移；嘧啶二聚体

Cyclopentadiene monomer is not stable and undergoes spontaneous Diels-Alder addition to produce the dimer and higher polymers.

环茂二烯单体是不稳定的，它会自发进行Diels-Alder加成反应，产生二聚体和更高的多聚体。

The invention relates to a method for preparing dimeric acid methyl ester and dimer acid thereof.

本发明是一种制备二聚酸甲酯及其二聚酸的制备方法，以不饱和脂肪酸甲酯含量较高的混合脂肪酸甲酯或混合脂肪酸为原料，浓硫酸为助催化剂，无水氯化铝或无水氯化锌为催化剂，采用两步催化法进行二聚化反应。

Objective To investigate the significance of platelet granula membrane protein（GMP-140）and D-dimer in patients with systemic lupus erythematosus.

目的 探讨GMP-140和D-二聚体对系统性红斑狼疮的检测意义。

TGFβ is a kind of homotype dimer polypeptide. It shows a high affinity with serine/threonine recipient albumen. It also has an extensive biological effect and features the function of restraining the proliferation of several kinds of cells and helping the inflammationand wound healing.

TGFβ是一种同型二聚体多肽，与跨膜丝氨酸/苏氨酸受体蛋白具有较高的亲和性，具有较广泛的生物学效应，较显著的是抑制多种类型细胞的增殖以及在炎症愈合和创伤愈合中的作用。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。