异位的

1H NMR spectroscopic analysis of aromatic protons combined with theoretical analysis of molecular structures proved the existence of two rotational isomers at 300 K, as well as a rapid interconversion equilibrium at 330 K for both compounds Ⅰ and Ⅱ. However, only one conformer exists for compound Ⅲ and puerarin containing 7-phenolic hydroxyl instead of propyl in A-ring as the case of compounds Ⅰ and Ⅱ. Based on UV-Visible absorption data of neutral and basic solutions, and on the density function calculations, the 7-phenolic hydroxyl group in A-ring was found to be more acidic than the 4'-phenolic hydroxyl group in B-ring. The mechanism of derivation reaction and the structure-reactivity relationship of puerarin as an antioxidant were further discussed.

其中7-丙基葛根素Ⅱ属于新型取代衍生物；变温1H NMR和理论计算结果表明，在300 K时，葛根素和4'-丙基葛根素以单一构型存在；而7，4'-二丙基葛根素和7-丙基葛根素则存在两种核磁可分辨的旋转异构体，当温度升至330 K时，两种异构体可以相互转化；通过对比分析葛根素及其衍生物脱质子产物的紫外可见吸收光谱并结合理论计算，确定了A环上7位酚羟基比B环上4'位酚羟基先脱去质子，并由此进一步阐明了葛根素衍生化反应机理以及在抗氧化作用中可能的活性位点和结构活性关系。

The results indicate that thermal stabilities and decomposition mechanisms of the title compounds derived from the BDE, Ea and static electronic parameters are basically consistent. Homolysis of the N—NO2 bond is the initial step in the thermolysis of the title compounds, the meta-isomers are more stable than the para-isomers, and the ortho-isomers are the most sensitive.

结果表明，由BDE、Ea和静态电子结构参数推断的标题物热稳定性和热解机理的结论基本是一致的，N-NO2键均裂是标题物的热解引发步骤，间位取代异构体较对位取代异构体稳定，而邻位取代的异构体稳定性最差。

In addition, we presume that the role of different MMPs is distinct in various stages of EMs development. The difference of subjects which is resulted by the genetic difference of MMP-1 has the association with the risk of EMs, and the abnormal expression of protein may have relation with the development of EMs; The abnormal expression of MMP-3 has a very important role in the development of EMs; As a protein of endothelial expression, MMP-7 may participate in the development of EMs, endometrial cells with high-expression MMP-7 easily take place ectopic implantation in the blood of menstruate countercurrented and increase the risk of EMs; It is not confirmed in our study that there are the association of MMP-9 with the risk of EMs, but in view of other study, we will further evaluate the role of MMP-9 in the development of EMs.

且推测不同的MMPs基因在子宫内膜异位症发生和发展的不同阶段作用不同，MMP-1基因的遗传差异所导致的个体差异与子宫内膜异位症发病风险的个体差异相关，其蛋白的异常表达还可能与子宫内膜异位症的进展相关；MMP-3基因的异常表达在子宫内膜异位症的发展中起重要作用；MMP-7作为一个上皮性表达的蛋白，可能对子宫内膜异位症的发生起重要作用，带有MMP-7高表达的在位子宫内膜细胞更易在经血逆流中"异位"种植，增加个体子宫内膜异位症的发病风险；MMP-9虽然在本研究中没有被证实与子宫内膜异位症的发生和发展有相关性，但鉴于其它相关研究，有待于从其它方法证实MMP-9在子宫内膜异位症进展中的作用。

However, the formation of metal chelation at one or two side of biphenyl resulted a pair of enantiomers of monometallic or bimetallic complexes. Moreover, if the coordinating groups have chiral element (e.g., chiral oxazolines), the diastereomeric metal complexes will be formed.

而且，如果配位基团上带有手性元素，它们跟金属配位后得到一对非对映异构体，由于手性元素的影响，形成这一对非对映异构体的能量是有差异的。

Bronchiolitis obliterans is the most disturbing complication following lung transplantation. This study is to investigate whether prolonged ischemia would promote early establishment of BO Material and Methods Left lower lobectomy was performed from miniature swine. Lung fragments, each measured 1 cm3, contained terminal bronchioles were auto- or alloimplanted into the subcutaneous area around the nipples. These lung implants were removed on 7th; 14 th; 21 th; 28th and 56th days and were fixed for histological examination. Experimental group using the same procedures but the left lower lobe was washed with 4.degree.C Lactate ringer via interlobar artery before lobar bronchus was resected.

肺移植后的阻塞性细支气管炎是肺移植后最困扰的并发症，本研究的目的希望了解缺血时间的延长是否会促进阻塞性细支气管炎提早发生实验方法施行小猪的左下肺叶切除手术，将取下的肺切成含终末支气管1 公分立方的肺小块，以自体及异体异位肺移植模式，将植入小猪皮下的肺小块於植入后第7、14、21、28 及56 天取下，在病理下检示其病理变化，并利用原位灌留的方式将左下肺叶以4℃林格氏液灌洗后再摘除之，观察有无灌洗对於阻塞性细支气管炎生成的影响。

The products have an isoxazole mother core with 3-morpholinopyridyl substitution and possess an approxi-mately planar structure. In addition a number of ester groups, amino groups, triazole groups and oxazolidi-none groups were introduced to 5-position of the isoxazole mother core.

这些化合物均以异噁唑为母核，具有近似的平面结构，在异噁唑环的3-位引入吗啉吡啶基，而在5-位引入酯基、取代氨基、三唑环和噁唑烷酮环。

"Recent studies on the autoimmune origin of vitiligo also emphasize the probable implication of the immunosuppressive action of UV therapy in the repigmentation of vitiliginous plaques," the authors note."acrolimus, a new topical immunosuppressive drug developed for the treatment of atopic dermatitis, has shown some interesting results in treating vitiligo in 2 prospective studies."

研究人员指出，最近对於白斑自体免疫来源的实验，也强调了UV疗法的免疫抑制作用对於白斑再色素化可能的应用；Tacrolimus，一种新的局部免疫抑制药物，被开发用於治疗异位性皮肤炎，已经被两项前瞻性试验受瞩目的结果证实可以治疗白斑。

When there were two kinds of active sites with different properties, isobutene were formed on one kind of active site, and then, spilled over to the other active sites, reacting to MAL, isobutene forming as the final product was restrained, and the oxygenates yield was increased.

当催化剂表面存在相邻的两种化学性质不同活性位时，异丁烷在一种活性位上生成异丁烯后，异丁烯可能在催化剂表面迁移到另一种活性位上，继续反应生成甲基丙烯醛或甲基丙烯酸，这抑制了异丁烯作为产物从反应器中流出，并提高含氧有机物收率。

The algorithm splits the original image to some blockes and do DCT transform,chooses three low-frequency coefficients in every block,quantizes them and chooses the least significance bits,then does the xor operations with the corresponding bits of water mark.,the result is the key.At the same time,we choose three high-frequency,and do the same operation and generate the other key.

该方法对原始图像进行分块DCT变换，每块取三个DCT低频系数，把这三个系数量化后取最低有效位，与水印的对应位进行异或运算得到密钥；再取三个高频系数进行异或等运算得到另一密钥。

This Sm-catalyzed reaction firstly efficiently realized the catalytic cycle in the tandem rearrangement/reduction reaction of α-hydroxy epoxides, and moreover the diastereoselective amplification could be distinctly observed when two C1 epimers in substrate were subjected to this catalytic tandem reaction.

该催化的多功能串联反应，高度非对映选择性地一步控制了含有季碳的三个相邻立体中心，有效地构建了&2-季碳1，3-二醇&结构单元，首次实现了此类重排—还原过程的催化循环，其中对于两个C1位的差向异构体底物，此反应具有明显的非对映选择性放大特点。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。