双位

Poly with sulfonic acid groups were readily synthesized with biphenol and 1,3-bis(4-fluorobenzoyl)benzene in the presence of excess potassium carbonate followed by sulfonation with chlorosulfonic acid.

以二氯二苯甲烷和2，6-二甲基苯酚为原料合成了含有阻碍基团的双酚单体，用此双酚单体和1，3-二(4-氟苯甲酰基苯)在无水碳酸钾存在的条件下反应制得聚芳醚酮，然后用氯磺酸磺化，控制反应条件，使磺酸基团恰好进入苯环对位，制得新型结构的磺化聚芳醚酮。

The Xray diffraction analysis of the compounds (3) and (4) shows the presence of an intramolecular coordination of oxygen to the tin atom giving rise to a fivemembered ring in which the metal exhibits a distorted trigonal bipyramidal geometry.

并通过X-射线衍射测定了（3）和（4）的晶体结构，其空间群均为P2〓/c，晶胞内分子数Z=4，分子结构是以锡原子为中心金属原子、含分子内O→Sn配位键五员环的扭曲三角双锥结构，碳碳双键的两个氢是顺式构型。

The patient was a 66-year-old male who presented with paraparesis. On examination, strength was 5/5 in both upper extremities and 3-4/5 in both lower extremities. Pricking sensation was relatively retarded below the sixth thoracic vertebra on both sides. Fine-touch sensation was limited below the ninth thoracic vertebra on the right side and below the eleventh thoracic vertebra on the left side. Responses to vibration and joint position sense were well preserved. Deep tendon reflexes were increased in his legs. He had voluntary anal contraction and preserved anal and bulbocavernous reflexes. MRI revealed dissection of the descending aorta from T4 to T10 levels with thrombus present in the false lumen, and the thoracic cord was marked atrophy, especially from T6 to T8 levels. To the best of our knowledge, no such case had been reported so far.

这是一位66岁的男性病患，到院时以下半身轻截瘫来表现，检查后发现其双上肢肌力为5/5而双下肢肌力则为3-4/5，刺痛觉在两侧第六胸椎以下异常，轻触觉在右侧第九胸椎与左侧第十一胸椎以下异常，震动觉与本体感觉则皆属正常，深肌腱反射在两下肢均有异常增强的情形，肛门的主动收缩正常且肛门反射与球体海绵体肌反射均正常，核磁共振影像显示降主动脉在T4到T10处有剥离的情形并於伪腔内发现血栓，此外，病患之胸部脊髓则有明显萎缩的现象，以T6到T8处最为明显，就目前可见的文献资料，并无类似的报告被提出。

Methods In 12 fresh and 4 old mallet fingers.the broken tendons were sutured with double metal neddle and double button Bunnell''s suture.Matress suture using3-0 nylon suture were added.The suture tension maintained the DIP joints in extension of 10～20 degrees.No external fixator was used.

对12例新鲜锤状指、4例陈旧锤状指，用Bunnell带双金属针双钮扣肌腱缝合线缝合肌腱断端，即利用缝合线本身张力固定远节指间关节于过伸10～20度位，断端用3-0无创尼龙针线行褥式缝合，术后不用外固定。

An optical bistableoscillator with a double cavity self-pumped phase conjugator isproposed and the experimental results are given.

提出并实现了双环腔自泵浦位相共轭镜的双稳振荡。

In the structures of these complexes, zinc can act as the vertex of the networks in various styles: single atom; dicarboxylate, tricarboxylate or tetracarboxylate bridged binuclear SBU ; and octacarboxylate bridged trinuclear SBU.

在这些配合物的结构中，锌离子可以按多种形式作为网络结构的顶点：单原子，双羧基、三羧基或四羧基桥连的双核锌次级结构单元，八羧基桥连的三核锌次级结构单元，再与配体组装成不同的配位聚合物网络。

This factory's main products cre:double-spoke hand mheels,five-pointed-star-shaped knobs,arrow-shped handles,Tshaped handies,ect.,more than thity series,over two hundred special rubbr pats,nylonplasdic parts,it is also possible for this facty to produce and make all kinds of non-atsndard operating parts and special-shapediai-shpepedsealing parts according to the requireements of the customers.

弓行拉手、内波纹手轮、背波纹手轮、圆轮缘手轮、双幅条手轮、双柄手轮、小波纹手轮、镀铬手轮、手柄球、长手柄套、转动手柄、可折手柄、可调位手柄、方形拉手、椭圆拉手、星形手柄、碟形手柄、三角箭形把手、椭圆手柄套、铣床手轮、GB4141.23波纹手轮、小手轮、平面手轮、带可折手柄满幅手轮、表盘满幅手轮、把手、十字把手、压花把手、通孔把手、定位把手、T形把手、直纹把手、捏手、三棱把手、偏转旋钮、手柄套、小转动手柄、锥柱手柄、球头手柄、单柄对重手柄、双柄对重手柄、外方卡盘扳手、摇手柄、手柄座、锁紧手柄座、圆盘手柄座、4501分度盘、4502大把手、586刻度盘、工作灯、手柄杆、压配式油标、旋入式六角圆形油标、长型油标、圆形长拉手、等三十多种系列，二百多种规格，满足不同用户的需要，生产制造各种机械封件，特种橡胶件，尼龙塑料件，也可根据用户需要，生产制造各种非标操作件，异形密封件。

These compounds are of substantial interest both inviewpoints of theory and practical applications, mainlyunder the stimulus to achieve synthetic models either foractive sites of iron-sulfur proteins or for transitionmetal catalysts. This thesis describes the synthesis, structures andconformations of 51 new iron-sulfur cluster complexes,which have been characterized by elemental analysis andstandard spectroscopic methods. In addition, single-crystalX-ray diffraction analyses were performed for 4 representa-tive new compounds. Reactivities of μ-〓 with mono- and di- Grig-nard reagents derived intermediates toward various organicelectrophilic substrates were studied, along with complexa-tion of arynyl-containing iron-sulfur clusters by 〓Thus, several bridged, non-bridged, monomeric, dimeric,homonuclear, heteronuclear iron-sullfur and iron-sulfur co-balt-carbon cluster complexes were synthesized. A novelreaction and convenient route for the synthesis in highyield of tetranuclear iron complexes 〓 containing atetracoordinated sulfur atom was discovered, whereas aplausible mechanism based on experimental results was propo-sed for the formation of the new cluster type.

鉴于有机铁硫原子簇化学在基础理论发展和应用方面的重要意义，因此我们开展了这一课题的研究，并取得以下主要成果： 1、本文共合成了51个新有机铁硫及含钴碳簇基的有机铁硫原子簇配合物，除用元素分析，NMR，IR，MS法表征其结构和构象外，还用X-光衍射技术测得四个代表性配合物的单晶结构和构象； 2、我们业已发现炔基Grignard试剂同〓可形成一种&开环&与&闭环&中间物的平衡混合物，研究该平衡混合物同各种亲电试剂的反应； 3、研究发现了一种可高产率地形成〓含〓四配位硫挛合簇的新化学反应并对此反应提出了—种有趣的反应机理； 4、首次由1，4-二溴丁烷双Grignard试剂与〓制得一种新型铁硫簇双硫阴离子活性中间体，并进而研究了它的亲核反应性能； 5、找到了通过〓的光化学反应来合成簇合物〓-〓的一条有实用价值的新路线。

Were used to detect the experimental group and control group, supine position when the left renal vein compression section diameter of the expansion of paragraph a, b, left renal vein peak velocity pressure above Va, the pressure gradient, pressure, as well as the expansion of left renal vein peak velocity Vb paragraph and to observe the two forms of the spectrum, and then testing all the main subjects with renal renal artery, interlobar artery and renal blood flow velocity of the main renal artery resistance index; record of the experimental group urine test subjects in the number of red blood cells.

分别检测实验组及对照组平卧位时左肾静脉受压段、扩张段内径a、b，左肾静脉受压段峰值血流速度Va、压力阶差、压力，以及左肾静脉扩张段峰值血流速度Vb并观察两处的频谱形态，再检测所有受检者双肾主肾动脉、叶间动脉的血流速度及双肾主肾动脉阻力指数；记录实验组受检者尿常规化验中红细胞数量。

Different genotypes were determined in Luxi monotocous cows, Luxi twinning cows, Chinese Simmental cows, Angus cows and Simmental×Mongolia cows by restriction fragment length polymorphism. The value of polymorphism information content indicated that this was a moderate polymorphism in Luxi monotocous cows and Luxi twinning cows.

运用PCR-RFLP法验证并分析该位点在鲁西牛双胎群体和单胎群体及中国西门塔尔牛、安格斯牛和西蒙杂交牛单胎群体间的多态性，结果表明，在鲁西牛双胎和单胎群体中分布A、B两个等位基因，处于中度多态。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。