对称核

The possibility of 1,4-asymmetric induction in some nucleophilic addition reactions of chiralγ-amino Z-enals 7 with organolithium compounds was investigated.

本文研究了在手性的顺式-γ-氨基-α，β-不饱和醛(7)与有机锂化合物的亲核加成反应中的1，4-不对称诱导效应。

MRI of IHP has some features. Symmetric high signals on both T1WI and T2WI in basal ganglia, thalami and dentate nucleus have important diagnostic value for IHP.

特发性甲状旁腺功能减退症的颅脑MRI表现具有一定特征性，双侧基底节区、丘脑及齿状核对称短T1稍长T2异常信号具有很高的诊断价值。

The coordination geometry of the Eu atom is best described as a strongly distorted square-antipyrism.. The two Eu atoms are bridged by two N-oxide oxygen atoms forming a dimeric unit with crystallographic inversions centre. The Eu……Eu distance is 4.2137(9)〓. The two europium atoms and two bridging oxygen atoms is coplanar. The angles of Eu(1)-O(7)-Eu(1A) and O(7)-Eu(1)-O(7A) are 117.82(14)° and 62.18(14)°, respectively. 15 is the first dinuclear triboluminescent lanthanide complex reported.

同时还测定了其摩擦发光光谱与其光致发光光谱，并讨论了晶体结构和摩擦发光活性之间的关系。X-射线结构分析表明，15为有对称中心结构的配合物，每个Eu与三个HTTA的六个O原子和两个PyO的两个O原子形成八配位的四方反锥几何构型，2个N-Oxide O原子桥联两个Eu，形成了一个双核配合物，Eu。。。。

CH3OH has been designed, synthesized and characterized by X-ray diffraction analysis. In this dinuclear complex, it is worthy of notice that the source of tridentate chelate atoms (1N2O) of IDA is different from that of the reported complex.

合成过程中，我们还首次得到了与1，10-邻菲咯啉及亚氨基二乙酸络合的铜的不对称双核配合物晶体。

For the first time, we studied isospin effects on the two particle correlation functions, the light particle multiplicity and their ratio in HIC''s at intermediate energies, and find they are sensitive probes for the density dependence of the symmetry energy.

在国际上首次研究了重离子碰撞中两核子关联函数和轻粒子产生的多重性及比率的同位旋效应，发现它们敏感于核物质对称能的密度相关性。

After adding isospin dependent high order correction terms to existing relativistic mean field models, the density dependence of symmetry energy and the neutron skin thickness S for 208Pb are studied.

在现有的平均场模型中引入同位旋相关的高阶修正项，研究了核物质对称能的密度依赖性和208Pb的中子皮厚度。

The rest reside among the populations. and that about 80.98% of 12 double chromosomal variability in arm ratio existed within the populations. The rest reside among the populations. Nested random effects analysis of variance for variable the relative length, arm ratio of chromosome, the mean of ratio (largest/smallest), mean ratio of ann. As. K. and actual length of genome of chromosome. As a resuit, chromosomal structure variations was 96.36% within the populations.

结果］在相付长度方面，香水百合12对染色体变异约有88.91%来源于居群内，约有11.09%来源于居群间；在臂比方面，香水百合12对染色体变异约有80.98%来源于居群内，约有19.02%来源于居群间；在染色体长度比、平均臂比、核型不对称系数和染色体组实际长度方面，香水百合染色体变异约有96.36%来源于居群内，约有3.64%来源于居群间。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失