查询词典 tip

In this study, in order to examine the dynamics of tip [Ca2+]i together with the dynamics of tip-localized F-actin in vivo, a kind of double labeled material was constructed. The Ca2+ and actin microfilaments of Arabidopsis pollen tubes were labeled by cameleon and GFP-mTalin respectively.

本研究以拟南芥花粉管为材料，通过转基因技术，将分别标记Ca~(2+)和微丝的两种荧光蛋白cameleon与GFP-mTalin在花粉管中同时表达，实现活体花粉管中Ca~(2+)与微丝的同时标记。

She used a hollow, white rubber tip, like those put on the spring-type doorstops to avoid scratching the door or wall. A small square of rubber from a bicycle tire was glued on the tip, and a small piece of a wide rubber band glued on top of that.

她用一块空心的白色橡皮做底座——就像弹簧门上包的防止刮伤门板或墙壁的那种橡皮——一小块自行车内胎上剪下的橡胶粘在底座上，最上面还粘了一小圈粗橡胶条。

Segments produced clusters of somatic embryos from embryogenic calli or directly from root apical meristems , and that also can convert into bud directly in the different tissue culture conditions. Modified media B5 with 1.0 mg.L-1 2,4 - D and 3.0mg.L~1 6-BA is suit to induce calli, and 0.5 mg.L-1 NAA is fit for somatic embryos inducement from calli. 6-BA encreased direct somatic embryogenesis on root tip distinctly,but NAA is retard it. NAA also prolong the time of root-tip convert into bud directly.

在改良B_5(微量元素为原来的1／3)中加入1.0mg.L~(-1)2，4—D和3.0mg.L~(-1)6-BA对离体根尖的愈伤组织诱导较为合适，0.5mg.L~(-1)NAA有利于从愈伤组织上产生体细胞胚；6-BA明显促进离体根尖直接产生类原球茎，而NAA则有阻碍作用；同时NAA的存在也使离体根尖直接成芽的时间延长。

Aiming at irregularity of a real fracture surface or a real crack profile, applying Griffith's criterion and fractal geometry, the real asymptotic expression at the crack tip is developed, and it is discovered that the fractality of the crack reduces the stress singularity at the crack tip.

5针对实际断裂面或裂缝的不规则性，利用Griffith能量平衡原理及分形几何，推导了裂缝尖端实际应力场和位移场的表达式，研究发现，裂缝的分形性减小了裂缝尖端应力的奇异性。

Work on pressure-jets in preparation for the Jet Gyrodyne and the Rotodyne led Fairey to believe that a rotor-tip drive would be ideal for the Ultra-light Helicopter, and preliminary studies showed that a tip-jet-driven version could be designed to do better than meet the requirements.

飞机上工作的压力，在准备射流Gyrodyne和旋飞领导费尔雷相信，转子尖驱动器将是最理想的直升机超轻型，并初步研究表明一个举报喷气驱动的版本可用于做更好满足要求。

Labial surfaces of lower molar tooth tip into a crescent, lingual tooth tip into a cone-shaped.

下臼齿唇面的齿尖成新月形，舌面的齿尖成锥形。

In chapter three the performance and structure of components of oxygen probe were especially investigated. The Cr-Cr〓O〓 powder was overcome by treatments. The reason of occurrence of thermal peaks on the EMF curves was explained. A water glass based cement which high temperature insulation was around 10MΩ within 10 seconds at 1600℃ was developed for the use of oxygen probe. The effects of tip end thickness of ZrO〓 tube and amount of reference electrode on response time and thermal equilibrium in oxygen probe were investigated. The optimum tip end thickness of ZrO〓 tube and amount of reference electrode addition were determined. It is found that the heat transfer in oxygen galvanic cell is the rate limiting-step in the response process. The national oxygen probe WOS Ⅱ type was designed and manufactured. By three batches of industrial tests its specification reached the level of American Celox Ⅱ type oxygen probe.

在第三章中分别从参比电极、高温绝缘水泥、插接件等组元入手，着重分析了其性能和结构，开发出了适合于钢液定氧用的Cr-Cr〓O〓参比电极，解决了Cr-Cr〓O〓参比电极高温产生收缩问题，解释了电动势曲线产生峰值的原因；开发了适合于定氧测头使用的水玻璃基耐火水泥，其高温绝缘电阻在1600℃，10秒以内为10MΩ左右；同时对ZrO〓管头部厚度、参比电极量对响应时间的影响以及定氧测头中的热平衡进行了研究，得出了合适的ZrO〓管头部厚度和参比电极加入量，确定了氧浓差电池中的传热是响应过程的限速步骤；设计制造了国产WOSⅡ型定氧测头，进行了三次现场定氧测试，其技术指标达到了美国Celox型定氧测头的水平。

The model involved effect s on SERR computation by large rotation of the crack tip and variety of discrete element shapes. The method of SERR calculation at the crack tip was modified.

该模型考虑了裂纹尖端大转动和离散单元形状变化对应变能释放率计算的影响，修正了裂纹尖端应变能释放率的计算方法。

The results show a reversed-flow region is formed at the tip of the pressure side due to the influence of the outside hot combustion gas and the pressure side tip thickness. The pressure gradient makes the coolant flow exit from the trailing edge slot first separates from the trailing edge cut-back, and then affected by the expansion wave, the coolant gas reattaches the cut-back of the trailing edge after passing a certain distance.

研究表明，由于外流和叶片叶盆尾缘厚度的影响，叶盆尾缘端部形成局部回流，叶片尾缘劈缝气体流出后受压力梯度的影响先抬起与叶背面分离，在流过一段距离后由于跨音速流膨胀波的作用，冷气流再次附着在叶背尾缘上。

One super-easy way to wrap is to form a triangle by folding the bottom tip to the top tip and pinch out as much air as possible.

一种超级简单的包云吞方法就是通过把皮的最底下的一个角与最上一个角对折，接着把空气挤出，尽可能地捏紧。

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％。