查询词典 concentration on

As described in this paper, basing on the stress concentration factor and the equations given by Craeger and Barnby, a mathematical expression Ni=B(1/2π/2⊿σ_~m is derived for calculating the initiation life of fatigue cracks for the externally short notches on the fitted axles caused by the application of bending stresses.

本文根据Craeger公式、Barnby公式及缺口应力集中系数，导出了浅缺口在弯曲应力作用下的疲劳裂纹萌生寿命的表达式：。

In this paper, a quaternary ammonium salt of chitosan was synthesized and the factors affect on the solubility or degree of substitution of product, such as the concentration of alkali, the time of basification, the content of water in system, the time of dispersing and the method of adding epoxyproryltrimethylammonium chloride, were discussed in detail. The product was characterized by IR, DSC, TG and X-RAY diffraction. The effects of time, humidity and temperature on the gases permeability of the quaternary ammonium salt of chitosan film were researched.

本论文研究了壳聚糖季铵盐的合成反应，对碱化浓度、碱化时间、水的含量、分散时间和醚化剂的加入方式等因素对制备反应的影响进行了考察；应用红外光谱、DSC、TG以及X-射线衍射对产物进行了表征；探讨了时间、湿度和温度对壳聚糖季铵盐膜透气性的影响。

RESULTS: Basilar artery, thoracic aorta and ventricular papillary muscle Resting tension of basilar artery was increased by DL but decreased by niof basilar artery and thoracic aorta induced by noradrenaline bitartrate and KCl can be relaxed by DL in a dose dependant manner, and the half-effective concentration was (6.69±3.12)×10-4,(3.41±1.52)×10-3mmol/L for basilar artery, and (1.49±0.59)×10-3,(2.91±0.99)×10-3 mmol/L for thoracic aorta, displaying stronger inhibition on the constriction of basilar artery induced by noradrenaline bitartrate than on the contraction induced by KCl.

重酒石酸去甲肾上腺素、KCl所致基底动脉及胸主动脉收缩，二氢石蒜碱使之呈剂量依赖性松弛，其半数有效浓度值：对基底动脉分别为(6.69±3.12)×10-，(3.41±1.52)×10-3 mmol/L；对胸主动脉分别为(1.49±0.59)×10-3，(2.91±0.99)×10-3 mmol/L。拮抗重酒石酸去甲肾上腺素所致基底动脉收缩作用明显强于KCl。尼莫地平对KCl所致收缩的抑制显著强于对重酒石酸去甲肾上腺素。

Through analysis on the technology characteristic and the main operating point in the different parts of process, such as granulation system temperature control, biuret concentration control, aminated triple superphosphate, dedusting and washing system, raw material distribution system and so on, the advantage of high-nitrogen compound fertilizer produced by K-T process is remarkable.

介绍尿基复合肥K-T技术工艺流程；通过造粒，系统温度控制，缩二脲含量控制，重钙的氨化，除尘洗涤系统，配料系统等方面的技术特点，操作控制要点的分析，指出K-T工艺生产高氮复合肥的突出优势。

OBJECTIVE: To study the effects of prolonged 75% oxygen exposure on the expression of vascular endothelial growth factor and its receptors (VEGFR1 and VEGFR2) in the neonatal rat lungs and to elucidate the effects of prolonged exposure of high concentration of oxygen on lung vascular development and its relationship with bronchopulmonary dysplasia.

目的：研究持续吸入75%氧对新生大鼠肺血管内皮生长因子（vascular endothelial growth factor，VEGF）及其受体（VEGFR1和VEGFR2）表达的影响，探讨较高浓度吸氧对肺血管发育的影响及与支气管肺发育不良（bronchopulmonary dysplasia，BPD）的关系。

The effect of Profenofos on GPx activities and on the co ntents of GSH and CAR in Phaeodactylum tricornutum and Platymonas helgolan dica were studied. The results indicate that the GPx activities of two species of microalgae declined, and the contents of glutathione and carotinoid of algal c ells decreased under high concentration of Profenofos.

摘 要 实验以三角褐指藻和青岛大扁藻为材料，进行了丙溴磷农药对海洋微藻的抗氧化防御系统成份— GPx 活性和GSH、CAR含量的影响研究，结果表明，在丙溴磷胁迫下，微藻的GPx活性呈现下降趋势，GSH和CAR含量也表现为下降趋势，并且胁迫的时间越长、胁迫的强度越大它们下降的幅度也越大。

However, the research on market structure and concentration were mainly focused on developed countries in America and West Europe, compared with CEE and CIS transitional countries.

目前有不少文献研究世界上各国市场结构对银行竞争的影响，但是大多数文献关注欧美发达国家，对中东欧和独联体转型国家的研究却很少。

But we can't dwell on that and we have to keep our concentration high and be centred on our objectives.

但是我们不能停留在那里，必须全神贯注于我们的目标上。

But when the cholesterol was substituted by its oxide result, the membrane life time extended to nearly 60 hrs ;besides the diameter of the hole on which the membrane exists 、temperature、PH value cause great effects to the life time of the membrane, and the diameter was the most important element. When the diameter larger than 3mm it is almost no way to form a membrane on the hole under experiment condition. Between 1mm and 3mm it has a better result by change the prescription of the membrane. when it is 0.5mm all the membrane can last more than 40 hrs ,and the prescription like Och : phosphatidylcholine / cephalin＝4:1; 3:1; 2:1; 1:1; 2:3 need the request of the experiment basically, when cooperate with multi hole structure it is very to detect the concentration and found the model.

研究结果说明，成膜在普通胆固醇/磷脂配方下不能达到满意的结果，无论如何改变外界条件成膜始终超不过7小时，而将胆固醇换成氧化胆固醇再和磷脂按照一定配比的时候，成膜时间则大大延长，可达60h左右；另外除成膜配方，成膜孔径、温度、PH值等因素对成膜有着很重要的影响，成膜孔径对膜的影响最为关键，在3mm以上的孔径时成膜比较困难，在1－3mm适当提高成膜液浓度可以改善，孔径为0.5mm左右成膜比较稳定基本都能达到40h以上，合适的几个配方如卵/脑磷脂：氧化胆固醇＝4：1；3：1；2：1；1：1；2：3基本满足实验要求，配合一板多孔结构，可以保证单位时间的离子传输量的检测和计算。

Based on the observation data of aerosol particles in 2004 in Chaozhou coastland,the inorganic ion concentration distribution of atmospheric aerosol and the effect of meteorological element on them were analyzed.

根据2004年广东潮州沿海地区的气溶胶浓度观测资料，分析潮州沿海大气气溶胶无机离子浓度分布特征及气象要素对其的影响。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。