发现物

The Diels-Alder cycloadditions of [60] fullerene for preparation of optical limitingmaterials are discussed in chapter 3 and 6. Soluble cycloaddition derivatives of 〓aresynthesized by the reaction of 〓 with indene,1,1'-biindene andcyclopentadiene derivatives.〓Particular, the Diels-Alder cycloaddition of 〓 with1,1'-biindene under controlled conditions affords the stable monoadduct 〓〓of novel structure, which was confirmed by HPLC, FTIR, FD-MS,〓NMR,〓 NMR, HMQC and HMBC spectra, Its two bridgehead cage carbons resonate at70.91ppm, The 〓 NMR spectra showed 38 lines consistent with the 〓 symmetryassociated with [6,6] addition. The 〓 shows similar optical limitingproperties to that of 〓 in toluene for 8ns laser at wave length 532nm. Moreover, thehigh solubility of this adduct in polar solvents such as THF, acetone enables itsincorporation into sol-gel glass matrix. The thin films prepared via the sol-gel methodshow improved OL behaviour compared to those of 〓. The langmuir-Blodgett filmformation and uv-visible absorption of 〓 are also investigated. LBmonolayer of this compound is prepared on the air-water interface at 〓 mol/l. In chapter 4, three water-soluble derivatives of [60] fullerene: fullerol(1), theaddition product (2)of fullerol (1)with polyvinylpyrrolidone and fumaric acidderivative of 〓(3) are synthesized and characterized.

通过Diels-Alder环加成反应，用茚〓和1，1'-联茚〓及取代茂合成了一系列可溶性的〓环加成衍生物，发现可控制反应条件，使1，1'-联茚与〓反应，并高产率地得到具有新颖结构的单加成物，用HPLC、FTIR、FD-MS 及〓、HMQC、HMBC等多种波谱技术对其结构进行表征，测得它的两个〓杂化的桥头碳的化学位移为〓ppm，证明生成的衍生物为6∶6闭式环加成，〓NMR谱中共给出38个信号，表明〓联茚衍生物分子具有〓对称性；在波长532nm，脉冲宽度8ns的激光下，〓联茚衍生物的甲苯溶液的光限幅性能与〓的甲苯溶液相近，由于〓联茚单加成衍生物熱稳定性好，在四氢呋喃，丙酮等极性溶剂中溶解性好，能分别均匀地掺入溶胶-凝胶中，已发现它的溶胶(so1)光限幅性能优于纯〓的光限幅性能；使用Langmuir-Blodgett技术将〓联茚衍生物在空气和水的界面进行了LB单层膜和多层膜实验以及UV-Vis吸收谱研究，通过等温压缩曲线测试，证明浓度为〓〓时，〓联茚衍生物能够形成单层膜。

I contend that this Janus-faced relation with intermediary metabolism contributes to carcinogenesis; if proven, this finding would have important implications for public health, in that it would lend support to the idea that prevention of obesity, and caloric restriction and exercise could reduce the predisposition to cancer.

我认为对癌症发生产生作用的中间物代谢具有两面性关系；如果这一发现得到证明，那么它将对公众健康产生重要的深远意义，因为这一发现将支持预防肥胖、限制热量摄入和锻炼会减少易患癌症体质这一观点。

Cloudina was known as the first animal acquired mineralized skeleton at the terminal Neoproterozoic,but it was not the only exception that could secret minerals. More evidence of diverse skeletal animals came from deposits before the Cambrian"big bang". A relatively diverse tubular microfossil assemblage is described from the Terminal Neoproterozoic Dengying Formation of South Shaanxi, China.

末元古纪以Cloudina为代表的管状动物化石是目前世界上公认最早的具矿化骨骼的生物类群，在世界许多地区都有发现，但它并不是当时唯一的矿化生物类型，更多的动物骨骼化化石证据在寒武纪大爆发之前的沉积物中时有发现。

Drs. William Murphy, George Whipple and George Minot discover that liver extracts cure pernicious anemia.

迈诺特博士一起发现了肝脏榨取物可以治愈有害的贫血症。1934年，他们由于这项发现而分享了诺贝尔奖金。

Http://www.friendster.com/vickyxy there are thousands of pics in fact, no time to update, like to time to figure out my mussy mind, time is of course excuse, the main reason is i need to warm up/restart myself for new life...still, i am that cat.

这个选择真的很挑战我的自信，才发现原来自己一直都是中规中举的人，从未做过有背"常理"的事情；现在发现，要用一副沉静的眼光看这个世界，对人，对物，都应自有一种态度。。

This phenomenon is caused by the kinetic competition between nucleation process and growth process.

基于这一发现，我们改变剪切诱导亚稳区中的升温速率，在共混物中发现两类不同的变化。

On the side,many atypical virus particles such as truncated,cone,pillar particles,and the cytoplasmic inclusion bodies were examined in the brain tissue and culture cells,which inoculated different strain.

另外，在不同毒株的脑组织和细胞培养物中还发现了大量的非典型粒子，诸如截断的粒子及锥形、柱形等形态，同时还发现了胞浆包涵体。

The streptomyces was found for the first time to be able to oxidize ammonia to nitrite. The denitrifying bacteria were found for the first time to be able to oxidize ammonia anaerobically. The ANAMMOX bacteria were isolated for the first time in pure culture and a new method for ANAMMOX bacteria isolation was developed.

首次发现链霉菌具有亚硝化能力，首次发现反硝化细菌具有ANAMMOX能力，首次获得具有ANAMMOX活性的腐霉状菌纯培养物，并建立ANAMMOX菌的分离方法。

It is intimately involved in spindle formation and chromosome segregation during mitosis. Now, the over-expression of PLK1 has been found in various primary carcinomata, and indicated the probability of PLK1 as a new tumor marker.

近年来，研究发现PLK1（polo-like kinase 1）基因在有丝分裂过程中起重要的调节功能，并且在多种的人类肿瘤包括肺癌中发现PLK1基因表达升高，提示PLKl的增长表达在细胞的增殖中起重要作用，预示PLK1可能是一个新的肿瘤标记物。

Objective to evaluate the functional recovery of acute spinal cord injuried rats treated with exogenous wnt-3a signal protein administration and to explore its mechanism.methods moderate spinal cord contusion injury was made in 40 adult sprague dawley rats at t10.twenty rats served as contusion controls(group 1).twenty rats were treated with wnt-3a for three days after injury (group 2).the functional recovery of the rats was observed through basso,beattie,bresnahan open field locomotor score.rats were killed at 14 or 28 days after injury,then spinal cords were removed for histopathological examinations,and the expression of the bromodeoxyuridine plus neural cell markers was stained with immunohistochemical method.results rats of two groups receiving a contusive injury recovered substantial function within 1 week.by 28 days,rats in groups 2 scored 7.0 points better on the bbb scores than rats in group 1 group 2=16.94,after 28 days vs.

目的 研究外源性wnt-3a信号蛋白对脊髓损伤的修复作用，并探讨其作用机制。方法取40只成年雌性sd大鼠在t10节段制备适度脊髓挫伤模型。随机从中取20只为损伤对照组(group 1)，另外20只为损伤治疗组(group 2)。脊髓损伤3天后用wnt-3a蛋白治疗。这些大鼠的功能恢复通过basso、beattie、bresnahan开放视野运动评分来观察。这些大鼠分批在损伤后14天或28天被处死，取出损伤节段脊髓用来组织病理学检查，同时用5-溴脱氧尿嘧啶核苷和神经细胞标记物进行免疫组化染色。结果两组大鼠在伤后一周运动功能有明显的恢复。不过，到损伤后28天，我们观察发现，损伤治疗组中的大鼠bbb评分比损伤对照组中的评分高出7.0分左右(group 2∶16.94±1.18，group 1∶9.89±1.29；p.05)，光镜和电镜检查发现wnt-3a蛋白对髓鞘形成和轴突再生有一定的修复效果。

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％。