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Faba root tip was studied through detection of micronucleus technique Both of nitrate (0.08 mol/L) and nitrite (0.80 mmol/L) with low concn of could significantly induce the formation of micronucleus of V. faba root tip (P.01), and showed an obvious dose effect, i.e. the permillage of micronucleus was in linear increase with rising up of mutagen concn within a certain range.

结果］低浓度的硝酸盐(0.08mol/L)、亚硝酸盐(0.80mmol/L)均能显著诱发蚕豆根尖微核的形成(P.01)，并呈现出明显的剂量效应，即微核千分率在一定范围内随诱变剂浓度的增加而线性增加。

Compared with the existing finite element eigenanalysis method[8]for asymptotic fields near the crack tip, current method has the following several characteristics: The jump-off that educes the virtue work formula is different; when solving the characteristic formula with FEM, the form of the element is non-confirming element; the singular transformation technique is not used in the assumption of displacement fields surrounding the wedge tip.

该方法与过去的有限元特征分析方法[8]相比的显著特点是：导出虚功原理的出发点不同；有限元单元形式为非协调元；楔形体端部邻域内的位移场假定没有采用奇异变换技术。

Employed the Hamiltonian system theories of elastic mechanics, a series of crack singular analytical elements satisfying different boundary conditions along crack surfaces in the vicinity of crack tip are constructed. These hyper-elements can describe the crack tip fields accurately for different simplified fracture models.

应用弹性力学哈密顿体系理论，在裂纹尖端构造出满足不同裂纹表面边界条件的一类裂纹奇异解析元，该类超级单元能够准确描述不同简化模型下的裂纹尖端场。

There are the following several points different from existing finite element eigenanalysis methods for asymptotic fields near the crack tip:(1)The jump-off that educes the formula is different.(2)The form of the element is a ad hoc element.(3)The singular transformation technique is not used in the assumption of displacement fields surrounding the wedge tip.

该方法与过去原有求解裂纹端部近似场的有限元特征分析方法有几点不同：(1)导出公式的出发点不同；(2)单元形式为高次内插单元；(3)尖劈端部邻域内的位移场假定没有采用奇异变换技术。

Detailed work have done at four aspects as follows: the usage of SPIV in multistage turbomachinery; the study of compressor rotor tip complex flow with SPIV; the study of compressor stator tip complex flow with Rotor/Stator interaction and the detailed analysis and comparison of the unsteady flow field respectively obtained by CFD and experiment investigation.

详细本文主要以SPIV非定常实验测量和CFD非定常数值模拟为工具，研究叶轮机端壁复杂流动的一些机理性问题，围绕四个方面开展了叶轮机端壁非定常流动方面的研究工作：适用于多级叶轮机械使用的SPIV技术；压气机转子尖区复杂流动；动静叶干扰条件下压气机静子内尖区非定常流动；以及非定常数值模拟结果与非定常实验测量结果的对比。

The nature of a tip leakage vortex observed in a rotor tip region has been studied by many researchers because of its important role on the flow field; for example, Inoue and Kuroumaru [1], Storer andCumpsty [2], and Lakshminarayana et al.

Zoue和Kuroumaru、Store和Cumpsty、Lakshminarayana等都从事该方面的研究。

Using fiberoptic scope, we verified the eight locations (inside the glottic opening; the base, middle portion and tip of the epiglottis; vallecula; bilateral piriform sinuses; and the esophagus) of the tip of the endotracheal tube-TrachlightTM unit in eleven human frozen cadavers.

利用可携式插管用内视镜，在十一位大体老师身上，将气管内管/ TrachlightTM 组装单位的尖端分别放置於以下八个位置：﹙1﹚声门内；﹙2﹚会厌软骨基部；﹙3﹚会厌软骨中部；﹙4﹚会厌软骨顶部；﹙5﹚溪；﹙6﹚右侧梨状窦；﹙7﹚左侧梨状窦，以及﹙8﹚食道内。

I'm That awakened, the original was cactus in self-defense weapon - Cirsium rolling a bit and saw it tip vertical stab tip was high, it seems to warn me, only appreciation, are not allowed to touch it, be careful before spending my bodyguard's "Needle children."

我这才如梦初醒，原来是被仙人球的防身武器——刺儿扎了一下，只见它尖尖的刺竖得高高的，似乎在警告我，只准欣赏，不准碰它，小心我这花前侍卫的&针儿&。

Well developed shoots were successfully obtained after 45 days of culture of shoot tip explants on MS medium supplemented with 4-8 mg/l Benzylaminopurine and 0.5 mg/l α-Naphthaleneacetic acid. Addition of 0.01-0.5 mg/l Thidiazuron in the medium was found to be beneficial for rapid growth of shoot tip explants.

培植体培养於MS基本盐类并添加4-8mg/l BA和0.5mg/l NAA的培养基45天后，对促进新茎节萌发效果良好；而接种於含0.01-0.5mg/l TDZ固体培养之茎顶培植体，也显示有促进茎节快速生长的作用。

Root,immunoassay of ELISA(enzyme linked immunosorbent assay) was employed to determine IAA concentration in root tip, unilateral application of agar block containing IAA on root tip was carried out to investigate the effect of exogenous IAA on phototropic response.

为了研究生长素在水稻根负向光性反应中的作用，用含有IAA的琼脂块贴附在种子根的根尖表面观测IAA对根的生长效应，用ELISA法测定根尖的IAA含量，并对种子根弯曲部分进行半薄切片，结果表明：(1)种子根的生长方向既受光的调控也受外施的IAA的调控，根尖向贴有含IAA琼脂块的一侧弯曲生长；(2 )不定根在光照 1.5h后，背光侧的IAA含量明显大于向光侧；(3)种子根尖发生弯曲生长是伸长区的细胞不均等生长所致。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了