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Unlike unbiasedness―which is a feature of an estimator for a given sample size―consistency involves the behavior of the sampling distribution of the estimator as the sample size n gets large.

无偏性是,给定样本容量n下,估计量的性质;一致性则是,当样本容量n变大时,估计量的样本分布的变化特征。

The use of benzazepin-N-acetic acid derivatives which contain an oxo group in the a position to the nitrogen atom and are substituted in the 3 position by a 1--cyclopentyl-carbonyl-amino radical, and of their salts and biolabile esters, for the prophylaxis and/or treatment of heart damage caused by cardiotoxic doses of medicaments or chemicals, in larger mammals and in particular humans.

本发明涉及苯并氮杂∴-N-乙酸衍生物及其盐和生物不稳定的酯的应用,其中苯并氮杂∴-N-乙酸衍生物在氮原子的α位置含有氧代基,且在3-位置上被1--环戊基-羰基-氨基残基取代,用于预防和/或治疗大的哺乳动物和特别是人体的心脏损伤,其中心脏损伤是由心脏中毒剂量的药物或化学品引起的。

In a similar way, using N,N\'-dibenzyl tartamide as auxiliary,-(2-methyl)allyl-2-chloro-phenyl-methyl azide, a vital intermediate of Repaglinide, can be prepared via asymmetric allylation of o-chlorobenzaldehyde in

产物经氧化和碘加成内酯化反应得到阿伐他汀中间体(3R,5S)-3-羟基-5-碘甲基戊内酯(10);将N-苄基酒石酸二酰胺用于邻氯苯甲醛的不对称烯丙基化反应以较高光学收率得-甲基烯丙基-2-氯苯基-甲基醇

Methods 174 cases of esophago cardiac operation were divided into three groups at random.A group(n=60) received CINB,B group (n=57) received patient controlled intravenous analgesia.C group(n=57) as control received neither CINB nor PAC.Compare the different of the ache degree and the dose of the drugs used and the change of breath s data between three groups.

174例行食管贲门手术患者随机分为3组,A组(60例)采用肋间神经阻滞镇痛作为试验组,B组(57例)采用术后静脉自控镇痛组及C组(57例)为对照组,观察各组患者术后疼痛及止痛药的使用情况;同时对比观察各组术前、术后呼吸功能指标的变化。

This contributes to the rigidity of the bearing and a precise radial guidance of the shaft. For special applications, full-complement cylindrical roller bearings are employed. The cylindrical roller bearing designs are shown in Figures 1.20 and 1.21.The designs of cylindrical roller bearings are distinguished by the arrangement of the lips. Design NU (Figure 1.21b) has two lips on the outer ring, the inner ring being lipless. In design N (Figure 1.21a), the inner ring has two lips, the outer ring has none. Cylindrical roller bearings of designs NU and N are applied as floating bearings because the rollers can freely shift on the lipless ring in the axial direction. Cylindrical roller bearings NJ (Figure 1.20) have two lips on the outer ring and one on the inner ring; they can take up axial forces in one direction. Design NUP (Figure 1.21d) is installed as a locating bearing to sustain frequently reversing axial forces.

这可以提高轴承的刚度,和主轴精密的径向引导,对于特别的运用,密排的圆柱滚子轴承被运用,圆柱轴承的图样在图。20和1.21展示圆柱滚子轴承图样由挡边的不知来区分,图样NU(图1.21b)在外圈有两个挡边,内圈无挡边,在图样N中内圈有两个挡边,外圈无挡边,图样NU和U所示的圆柱滚子轴承可制作浮动轴承因为滚子能够在轴向无挡边环上自由的移动,圆柱滚子轴承NG在外圈上有两个挡边,内圈上有一个,它们能够在某个方向上承受轴向力,图样NUP(图1.21d)被用来安装在一个保持经常扭转轴向力的固定轴承上。

Long-chain branched polyethylene was obtained using a homogeneous bianary catalyst system composed of late and early transition metal complexes,namely a mixture of bis(α-naphthalidine)-2,3-butanediimine NiBr2 and Cp* TiCl3,as catalyst precursors in the presence of MAO.

合成了一种后过渡金属镍化合物 [二- N ,N′--2 ,3-丁二亚胺镍二溴化物 ][C10H7—NC(CH3)C(CH3)N—C10H7]NiBr2,此化合物在MAO活化下催化乙烯聚合能得到含有末端双键的低分子量聚乙烯,即长链α-烯烃。

In recent years, both HeV and NiV have continued to emerge and reemerge, The epidemic investigation suggested that the virus could be widely present in the Flying foxes, especially Pteropus lylei in Tailand and Cambodia, which are close to China, moreover, the similar enviorment and Flying foxes species、distribution in the south-east area poese a great threat to pig industry and public health of China, based on the above issues, there is a pressing need for diagnostic technologies on the two virus.

为有效防治亨得拉病毒和尼帕病毒在我国的发生和流行,本研究首先利用原核表达系统成功地表达HeV N、NiV N基因以及NiV G一段主要抗原区基因GC,并证实了两种N蛋白的主要抗原区位于C末端约200aa区域。

This results indicated that peashrub shrubland created a favorable N condition for its invading the meadow and being invaded by birch forest, and played a important role in altering the successional direction of meadow→peashrub shrub land →birch forest.

尽管箭叶锦鸡儿灌丛植物叶片与凋落物中全N、全P浓度在大多数取样点上都低于硕桦,但表层土中全N浓度高于硕桦和草甸,且其土壤有机质的供氮能力以及维持氮素能力都高于硕桦林和草甸,表明,锦鸡儿灌丛为侵入草甸和硕桦入侵提供了良好的养分条件,在该演替序列的发展过程中起了一定的推动作用。

At the same time,a tension stress is applied on theγ′phase interfaces along the direction parallel to the stress axis,which results in the lattice expansion ofγ′phase to trap the Al,Ta atoms with the bigger radius.This brings out the accumulation of the solute atoms to form the N-type rafted structure.Al,Ta atoms with bigger radius diffuse to the {100} plane to form the linked bond of the heterogeneous atoms and the stable stacking mode,this is a main reason of promoting the transformation ofγ′phase into the N-type rafted structure.And the change of the strain energy density in different interfaces of the cubical-likeγ′phase is thought to be the driving force of the elements diffusion and theγ′phase directional growth during creep.

拉伸蠕变期间,类立方γ\'相中与施加应力轴垂直的界面受水平切应力,使晶格收缩可排斥较大半径的Al、Ta原子;与应力轴平行的界面受拉伸张应力,使晶格扩张可诱捕较大半径的Al、Ta原子,由此引起的原子偏聚形成γ\'相是自由能降低的过程;其中,较大半径的Al、Ta原子扩散迁移至{100}晶面,形成异类原子结合键及稳定的堆垛方式,是促使γ\'相形成N-型筏状结构的主要原因;而γ\'相不同界面的应变能密度变化是元素扩散及γ\'相定向粗化的驱动力。

To investigate the methods to effectively and simply assess the CAG repeat size of HD gene which was necessary for gene diagnosis of Huntington disease, the sequence including polymorphic CAG repeat of HD gene was amplified by PCR with TaKaRa LA Taq DNA polymerase and GC buffer. PCR products were analyzed on polyacrylamide gel to distinguish normal alleles from HD alleles. The DNA fragments of affected alleles were recovered from polyacrylamide gel as templets for secondary PCR. The secondary PCR products were cloned into T vector for sequencing analysis to determine CAG repeat size. A total of 20 normal individuals and 3 members from a HD pedigree were included in this study.

为了简单高效检测HD基因开放阅读框5'端n三核苷酸重复序列,建立快速准确的亨廷顿病(Huntington disease, HD)基因诊断方法,应用TaKaRa LA Taq DNA聚合酶配合GC buffer扩增HD基因包含n重复序列的目的片段,非变性聚丙烯酰胺凝胶电泳检测后回收n拷贝数异常增多的目的片段,再次PCR扩增后将产物连接至T载体,进行DNA测序确定CAG的拷贝数。

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推荐网络例句

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。