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The results show that the interaction mode is mainly electrostatic interaction at the low concentration of dobutamine and adrenaline whereas intercalative binding plays a dominant role at their high concentration.

结果表明，低浓度的多巴酚丁胺和肾上腺素与DNA之间主要为静电作用；而在高浓度时，则主要为插入作用。

The results show that the interaction mode is mainly electrostatic interaction in the low concentration of dobutamine and adrenaline whereas intercalative binding plays a dominant role in their high concentration.

本文利用光谱和电化学方法研究了儿茶酚胺衍生物与小牛胸腺DNA之间的作用机制。

RESULTS:Isoalantolactone exhibited excellent anti-proliferative activities on HeLa, SHIN3 and HOC-21 and HAC-2 cell lines, while 1-O-acetylbritannilactone and britannilactone demonstrated weak anti-proliferative activities on HeLa, SHIN3, HOAC-21 and HAC-2 cell lines even at the concentration of 100 μmol/L. The apoptotic rate in isoalantolactone group with the concentration of 12.5 μmol/L was higher than that in PBS group.

结果： 异土木香内酯对上述5种肿瘤细胞的增殖均有明显的抑制作用，1-氧-乙酰大花旋覆花内酯和大花旋覆花内酯即使在100 μmol/L的高浓度下，对5种妇科肿瘤细胞的增殖不显示抑制活性；流式细胞学检查发现异土木香内脂处理后的HeLa细胞出现凋亡现象。

POD and SOD activities in Juncus Effuses increased first and then decreased afterwards, while CAT activity decreased linearly. In gerneral, the enzyme activities were gradually activated when the concentration of heavy metals was within the lower concentration range of the soil environmental quality which indicated their synergic resistance to heavy metal stress to a certain degree.

在接近土壤环境质量标准低浓度设计范围内，灯心草3种保护酶有逐渐被激活的趋势，表现出一定的协调性共同抵制重金属的毒害。

Our results showed that:(1) In Chang Bai Mountain, salidroside content increased with the nitrogen and organic concentration of soil and decrease with phosphorus and kalium concentration in rhizosphere soil of Rh.

同时，对栽培高山红景天不同苗龄植株根中红景天甙含量的季节变化、与根重量的关系以及不同保存方法对红景天甙含量的影响也进行了初步研究。

Results When the cells were treated with Sodium Selenite at a concentration of 2.0mmol//L lasting 72h, karyopyknosis and chromatin condensation were observed under microscope; When the cells were treated with Sodium Selenite at a concentration of 4.0mmol/L lasting 72h, the cells in G0/G1 and S phase was significantly decreased, a typical apoptosis peak before G1 phase was shown.

结果 2.0mmol/L亚硒酸钠作用72h， HE切片可见核固缩、染色质边集等改变；4mmol/L亚硒酸钠作用72h， G0/G1期和S期细胞明显减少，在细胞周期G1前期可见典型的细胞凋亡峰。

Methods: To prepare serum containing drugs with Marsdenia Tenacissima extracts using method A and B, and evaluate this effect via different concentration levels through cellular morphology and MTT. Results: The maximum of no toxicity concentration of Marsdenia Tenacissima extract A towards HepG2 was approximately 0.648mg/mL.

用两种方法制备乌骨藤提取物含药血清，采用不同浓度的含药血清分别作用于培养的HepG2细胞通过细胞形态学和MTT法检测乌骨藤提取物含药血清对HepG2细胞增殖的影响。

The inhibition rate were -10.4%,-12.69%, 20.74%, 63.14% and 65.13% when the drug concentration levels were 0.389, 0.648, 1.08, 1.8 and 3mg/mL, respectively. The half inhibitory concentration of Marsdenia Tenacissima extract A was 1.86 mg/mL using regression method.

乌骨藤提取物B对HepG2细胞的最大无毒浓度大约为0.648mg/mL；药物浓度在0.389、0.648、1.08、1.8、3mg/mL时的抑制率分别为-10.4%、-12.69%、20.74%、63.14%、65.13%；用回归法求出乌骨藤提取物B对HepG2细胞增殖的半数抑制浓度为1.86mg/mL。

Micronucleus test results exhibited that significant differences in micronuclear rates were determined between 0.4 mL bone cement and 0.4 mL microsphere-coated bone cement groups and negative control group, but no significant difference was detected among other groups. This revealed that this microsphere-coated bone cement leaching liquor did not show significant cell heredity toxic effects. Nevertheless, microsphere-coated bone cement in the high concentration and high dosage groups exhibited low toxic effects, mainly showing increased hemolysis rate and micronuclear rate. Thus, it was necessary to control the dosage and concentration of microsphere-coated bone cement.

微核实验结果显示除0.4 mL骨水泥组和0.4 mL微球骨水泥组的微核率与阴性对照组差异有显著性意义，其余各组差异无显著性意义，说明该微球骨水泥的浸提液无明显细胞遗传毒性作用，但是高浓度和高剂量组的微球骨水泥仍有较低的毒性作用，主要表现为溶血率和微核率的提高，因此在应用时要适当控制微球骨水泥的剂量和浓度。

Mitotic index increased in some certain low concentration and decreased in high concentration of heavy metal ions.

在一定浓度范围内，微核率随重金属浓度的升高而增加，达到一定浓度后，微核率反而有下降的趋势。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！