小的环

Work was also carried out. From numerous facts of ourprevious work, it might be seen that the stereoselectivity of aziridination viasulfonium ylides depends upon the sulfonium salts and C=X compounds. The moreactive the sulfonium ylide and C=X compound are, the more cis product is generated.Whereas, trans product will be major if the activity of the sulfonium ylide and C=Xcompound is low.

通过对以往工作的总结，我们发现，在经由硫叶立德途径的小环化反应中有一个经验规律：产物的立体选择性与所用的锍盐和C=X化合物有关，即锍盐和C=X化合物的活性增强，有利于形成顺式产物，反之，锍盐和C=X化合物的活性降低，有利于反式产物的形成。

The results demonstrate that ACM-A is capable of intercalating between the base pairs of DNA double helix, the π-π electronic overlapping between π-electron of ACM-A and DNA stabilizes the ACM-DNA adduct, and through electrostatic interaction, the trisaccharide interacts with the minor groove of DNA owing to C(3') amino group.

实验结果表明，ACM-A主要以其蒽环平面嵌入DNA双螺旋碱基对之间，发生-等电子间相互共轭，同时药物糖基上C3'位的-N(CH3)2基团带正电荷，易与带负电荷的磷酸骨架产生静电吸引，从而发生沟槽作用，嵌入DNA的小沟区，这是二者之间的主要结合模式。并且，DNA与ACM-A药物原型的亲和力要强于还原后的药物代谢产物。

It is also proved that the proposed algorithm could guarantee the closed-loop system to be uniformly ultimately bounded and the output converges to a small neighborhood of zero, so that ship linear path-keeping control can be implemented.

该算法保证了闭环系统的信号是一致最终有界的，使得系统输出收敛到零的一个较小邻域，从而能够实现船舶的直线航迹控制；而且，该算法不需要高频增益符号的任何信息，还解决了可能存在的控制器奇异值问题。

Alkylidene cycloketones such as aza-cycloketones are common features of many bioactive compounds. Few methods reported are effective to construct these motifs in a stereospecific and controllable manner.

芳亚烷基-环酮结构尤其是含有氮原子的3-亚烷基-哌啶-4-酮是生物活性小分子中一种较为常见的结构，对其合成方法的研究报道却很少，已知的方法具有很大的局限性。

Degradation test in vitro was carried out in phosphate buffer solution (0.1M, pH7. 4) at 37 ℃. The buffer solution was changed daily. Degradation test in vivo was implanted the sample to subdermal in adult ICH rat in the scapular area lateral to the dorsal midline. At suitable time the samples were recovered. Molecular weight changes in surface layer and bulk of polymer sample were measured by GPC and weight loss was determined gravimetrically. It was found that the degradation behavior can be regulated by changing the composition of copolymers. The critical compositions from surface to bulk degradation behavior for PGCA, PLCA, PLMCA, PLDCA systems were 15-20, 20-30, 30- 40, 40 of mol percent GA or LA unit in copolymers, respectively. The degradation behavior of PGCA, PLCA, PLMCA, PLDCA systems were compared and analysed. Some factors influencing the degradation character, such as copolymer composition, hydrophobicity, crystallinity and enzyme affect etc. played important role.

体外实验中材料降解环境为37℃，0.1M，pH7.4磷酸缓冲溶液，每天换液，定期取样；体内实验中将聚合物试样埋置于ICH小白鼠背部肩胛骨皮下部位，定期处死小鼠，取样，将体内体外样品进行重量损失及试样内外层分子量变化测定，分析各聚合物试样降解行为特性，实验结果证明，改变共聚物组成，可以调节各聚合体系降解行为特性，对PGCA，PLCA，PLMCA，PLDCA共聚体系，交酯摩尔百分含量15-20％，20-30％，30-40％，40％分别为各体系内降解行为特性由表面降解型向本体降解型过渡的临界转折点，交酯含量较低的聚合物不同程度地表现表面降解行为特性，论文对各共聚体系体内外降解行为作了分析对照，例如共聚物组成对材料降解速度与降解行为的影响；生物体内酶对降解行为的影响；材料亲疏水性，聚合物链段结晶行为及碳酸酯结构对材料降解行为的影响等，得出交酯/环碳酸酯共聚体系降解行为一些共性和规律。

In the photoproducts with predominant quinoidal structure, abathochromic shift of absorption spectra is observed with increasing solvent polarity; inthose with predominant zwitterionic structure, a hypsochromic shift does so.

然而，所有这些取代基对光致变色反应的影响要较2〓位取代基的效应小得多。四。溶剂极性对光开环产物的吸收光谱和寿命的影响也被讨论了。这种影响效应的情况可概括如下： 1。

Stamens inserted at base of corona; filaments connate at base into a ring and alternate with minute interstaminal teeth; anthers connate at tips, adnate to stigma head, with apical appendages; pollen tetrads in masses.

雄蕊副花冠的着生的在基部；花丝合生在基部成为一环和互生的具小雄蕊间齿；花药合生的在顶部，贴生于柱头头状花序，具顶端附属物；在群众里的四合花粉。

Neuronavigation can offer accurate location and measure . 2. 4 spaces of sellar area could be viewed and controlled satisfied via supraorbital keyhole approach .

结果：1、导航系统的实时定位功能非常好，误差较小，在测量过程中具有良好的持续准确性，本实验颅内的测量结果可靠。2、眶上&锁孔&入路可以通过鞍区常用的四个手术间隙到达靶区进行手术，对Willis环相关血管的显露和操作空间良好。

But if that does not work, use some simple methods: part is a with corn flour of 喷粉器, and went to a place away from the scanner, the squeeze from 喷粉器 for the dispersalof from the air, when the high granula powder down, and they took transmissional draft of the piece, let it pass through spraying area, so that the fine powder particles in the air to it, in order to achieve the objective of the Elimination of Newton's rings.

但如果还来活命，那么不离给搁置一些单一的办法：局部是用装有玉米粉的喷粉器，行到挨近扫描仪的不天方，不兵玉米粉从喷粉器洋挤不入来，让它从空洋拆散，当不小颗粒的粉粒落下后，拿住透射稿的一角，让它穿过喷粉不天区，这样，空洋的粗粉粒不离落在其上了，以到达打消牛顿环的纲的。

Deep research and comparison show that, besides the centrarch xylem, H. reflexa has G-type tracheids. Upon and between the annular secondary thickenings, the lignified layer of secondary cell wall bears irregular simple perforations of small diameter and high density. So these perforations have the characters of S-type tracheids. The robust xylem strand and dense perforations indicate the strengthened water-conducting capacity.

深入的研究和比较表明H.reflexa的木质部除为心始式外，管胞为G-型，次生壁的木质化层具有不规则的简单穿孔，穿孔直径小，密度大，分布在环纹次生加厚带和其间，兼有S-型管胞穿孔的特征；粗壮的木质部束和密集的穿孔表明较强的输导能力。

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。