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Result: Isopropyl 3-(3,4-dihydroxyphenyl)-2- hydroxypropanoate exerted relaxation effect on the endothelium-intact artery precontracted by NE in a concentration-dependent manner, which was inhibited with denuded endothelium. The right-shift of the concentration-response curves of 5-HT, ET-1, U46619 and KCl.

结果：丹参素异丙酯可浓度依赖性舒张NE预收缩的完整内皮血管，去内皮后该作用明显降低；对5-羟色胺(5-HT)、内皮素(ET-1)，U46619和KCl量效曲线均表现浓度依赖性抑制。

The main results obtained were summarized as follows:Setcreasea purpurea Boom.has the ability to hyperaccumulate Cu.When the supply of Cu was 1000μmol·L~(-1),the Cu concentration in shoots and roots was up to 1105 and 1210 mg·kg~(-1)DW,respectively.Copper uptake and translocating efficiency of Setcreasea purpurea Boom.depended on the Cu concentration in nutrient solution.

为试验材料，综合运用溶液培养法、相关酶分析方法、ICP-AES元素测定技术、差速和超速离心技术以及分子生物学研究技术等从几个不同方面研究了该植物对Cu的超积累机理，取得了如下的结果。

An attempt was made to remove color from simulated wastewaters containing Acid Scarlet GR and Reactive violet K-3R by cloud point extraction using a nonionic surfactant of Triton X-114. The influence of the concentrations, equilibrium temperature and equilibrium time on the extraction efficiency was tested. The experimental results show that the extraction efficiency to dye increases with increasing concentration of TX-114 and salt or decreasing initial dye concentration.

本文选用非离子表面活性剂TX-114作浊点萃取剂，研究了由酸性大红与活性紫构成的单元和二元混合染料模拟有色废水的萃取脱色过程，讨论了表面活性剂浓度、染料浓度、盐浓度、平衡温度、平衡时间等因素对萃取效率的影响结果表明，提高表面活性剂浓度、盐浓度有利于提高萃取效率，而染料浓度增加则使萃取效率略有下降。

The alkali solution concentration and steam explosion process condition were optimized by testing the solubility of soft cellulose after steam explosion before and after treatment towards aq.NaOH with various concentration. It was concluded that the soft cellulose can dissolve in the 9% aq.NaOH solution completely under the condition of explosion pressure 3.0Mpa and explosion time 60s. At the same time, the influence of sweller-thiourea on the new aq. alkali soluble cellulose/NaOH solution was studied in this paper. The dissolving phenomena and the steam explosion mechanism of soft cellulose were discussed.

本文通过对闪爆前后软木纤维素在不同浓度的稀碱溶液中溶解度的测试分析，优化了碱溶液浓度和最佳闪爆工艺条件，得出在闪爆压力超过3.0MPa，保压时间为60s的条件下，软木纤维素可完全溶解于9％的NaOH稀碱溶液中，并且对助溶剂-硫脲对碱可溶纤维素/NaOH水溶液的增溶效果进行了研究和探索，同时也对溶解机理和闪爆机理进行了分析讨论。

The effects of organic modifier concentration, pH value of buffer, salt concentration of buffer and column temperature on the recognition of YPLG and YPGL were investigated.

实验中系统地研究了流动相中有机溶剂的含量、缓冲溶液的pH值、缓冲溶液的盐浓度以及柱温对四肽识别的影响。

And the output of the sensor is less dependent on the flow regime. 7. The helical phase concentration sensor designed has been used in the coal puffing system of the 3# blast furnace in Bao Gang to measure in-situ the coal concentration of the main pipe. Combined with the capacitance velocity sensor, the instantaneous mass flowrate of the pneumatic conveying coal is obtained.

在实验室条件下对螺旋形状表面板电容式相浓度传感器的理论优化结构进行了实验验证，对边保护极板提高检测场中心区域灵敏度的作用也进行了实验验证，静态实验结果与理论计算结果相符，传感器检测场的均匀性误差为4.18%，输出线性度好，对流型变化不敏感。

The granularity and mass concentration of cuttings at inlet of cyclone separator were obtained on the basis of the concentration of the drilling cuttings at wellhead.

通过对井口钻屑的采样分析和浓度计算，得到了旋风分离器入口钻屑的粒度分布和质量浓度范围。

The effects of factors such as the initial dye concentration, the H2O2 concentration, the pH value and different inorganic anions on the effectiveness of decoloration of direct sky blue were studied.

研究染料初始浓度、H2O2、pH值、不同阴离子等因素对直接湖蓝染料的脱色效果影响。

Ethyl cellulose membrane material has produced in physical modification method. The fundamental characteristics of reverse osmosis on EC membrane can be correlated with HPLC experimental conditions. By using EC membrane material as column packing, double-distilled water as mobile phase, the retention times are measured with suitable inorganic and organic compound as solutes.3. Complying with the retention times, the partition coefficient of the solute and the ratio of the surface excess concentration of solutewith the concentration of the parent fraction are calculated .

利用物理改性的方法研制了乙基纤维素(Ethyl Cellulose，简称EC)膜材料，并将其作为高效液相色谱柱的固体填料，以高效液相色谱模拟反渗透实验平衡条件，以水为流动相，选择合适的无机物和有机物作为溶质，测定乙基纤维素对它们的相对保留时间及平衡分配常数K_A′。3。

Single factor method were compared to the concentration of dyes, dye bath pH, temperature, Dyeing time to do a series of gradient experiment, the two groups reached on experiments with suitable for dyeing process conditions,such as the best dye pH, suitable dye concentration, Dyeing appropriate time,temperature values of humic acid and fulvic acid were dyeing wool and silk, and which the general situation has deep understanding.

采用单因素对比法分别对染料的浓度、染液pH值、染色温度、染色时间等做了系列梯度实验，得出了两组上染实验的最佳染液pH值、染料合适浓度、适当染色时间、适宜上染温度等工艺条件值，对腐植酸和黄腐酸分别上染羊毛线及真丝绸的大体情况有了很深的了解。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷