浓度

The results showed: for the toxicity of two kinds of pollutants, the Cd(superscript 2+) is more poisonous that the Pd(superscript 2+). For the sensitivity to the pollutants, the P. caudatum, C cathayensi and D. japonica increase evidently in turn. The statistical analyses indicated that the single and combined toxicity effects both increase with the exposed time extended, especially for the combined toxicity (P.05), showing a marked time-effect relation. As for the single effect, ii increase prominently with Pb(superscript 2+) and Cd(superscript 2+) concentrations (P.05); But in the case of binary effect, the results showed obviously a time-effect (P.01) as well as a concentraction-effect relations.

结果表明：在同等条件下，Cd(上标 2+)对三者的致毒效应都明显强于Pb(上标 2+)；3种动物中，草履虫最敏感，而圆田螺耐受能力最强；随单一毒物浓度的增大以及暴露时间的延长，两者的致毒效应都显著增大，表现出明显的浓度－效应和时间－效应关系；二者复合作用时，对3种动物的致毒效应主要表现为与二组分的浓度比例有关。

The optimal determining conditions were obtained: adding quantity of a monolayer medium 15ml, the suspension concentration of Micrococcus luteus 109 cfu/ml, the adding quantity of Oxford Plate 100μl, agar concentration 1%, the concentration of Na2HPO4 1％, and the pH of the medium adjusted to 7.0. The medium was optimized by single factor and the orthogonal experiments on the basis of the centrifugate of distiller's grains. The optimal composition was obtained as follows: sucrose 0.6, peptone 0.1, yeast extract 0.2, K2HPO4?

以管碟法为基础，对影响Nisin效价测定的各种主要因素进行了分析，并得出了Nisin效价测定的最佳条件：采用单层培养基（每个平板加量为15ml），检测培养基中Na2HPO4·12H2O浓度改为1％，菌悬液浓度109cfu/ml，不加吐温20，琼脂浓度1％，培养基pH7.0，牛津杯加液量100μl ，30℃培养24小时。

Methods Thirty ASA I women who underwent gynaecologic operation and requested epidural analgesia were enrolled in the study.Epidural catheter was placed at L2-3 and advanced for 3cm in the epidural space in a cephalad direction.

方法选择30例妇科手术患者，在术前硬膜外给予罗哌卡因10 ml，第1例患者罗哌卡因的浓度为0.660%，下1例患者的药物浓度根据前1患者有无运动阻滞情况来上调或下调1个浓度级。

The effects of external rare earth on growth and physiological of Chlorella ellipsoidea and Ceratophyllum demersum were studied. The results implicated that there were apparently negative linear interrelation between the concentrations of Sm, Y and the numbers of Chlorella ellipsoidea, which would best be described as polynomial interrelation at 2～40mg/L concentration range of Sm and 2～20 mg/L of Y. The LC〓 of Sm and Y was respectively 41. 36mg/L and 2. 57mg/L by statistics, which also indicated the toxicity of Y was greater than that of Sm.

外源稀土对小球藻及金鱼藻生长生理影响研究结果表明：(1)中稀土元素Sm和重稀土元素Y处理浓度与小球藻生长量之间存在明显的负线性相关关系；在稀土一定处理浓度范围（Sm为2～40mg/L，Y为2～20mg/L）内，小球藻生长量随培养时间的动态变化符合多项式相关关系；统计计算得Sm和Y对小球藻的半致死浓度LC〓分别为41.36mg/L和22.57mg/L，表明Y对小球藻的毒性大于Sm。

The system can endure the change of chloric ion concentration by increasing from 8 500 mg/L to 12 500 mg/L or decreasing from 8 500 mg/L to 4 500 mg/L, and it is more tolerant to the sudden increase than that of the sudden decrease of chloric ion concentration.

系统能够忍受氯离子浓度从8 500 mg/L直接升到12 500 mg/L和从8 500 mg/L直接降低到4 500 mg/L的变化，且抗氯离子浓度突然升高的能力比抗氯离子浓度突然降低的能力要强。

The chlorophyll contents and photosynthesis decreased gradually with the increasing of Cu2+ concentration. The respiration rose gradually in the range of 0.01～10 mg/L Cu2+ and fell gently over 10 mg/L. These results indicated that Chlorococcum sp.

在1 mg/L Cu2+浓度下，绿球藻对Cu2+的去除率最高为90.5%；叶绿素含量及光合作用强度随Cu2+浓度的升高逐渐降低；呼吸强度在0.01～10 mg/L Cu2+浓度范围内逐渐升高，大于10 mg/L Cu2+则逐渐降低。

ConclusionNew criteria of plasma lipid values in children in Beijing are established by our investigation in 971 healthy school students.Age and sex have been analyzed.Borderline and high of TC and LDLC levels have been settled.Cutoff of hypertriglyceridemia and hypohigh density lipoprotein cholesterolemia have also been established.

结论通过对971名北京市中小学生的血脂调查，建立了北京地区不同年龄性别儿童青少年的血脂正常值，确立了临界高胆固醇和高胆固醇血症浓度、高甘油三酯血症浓度和低高密度脂蛋白浓度。

Hepatic chymase concentrations in S3 and S4 cases were greater than in S1 and S2,〔53+54=(31.3±24.6)ng/mg vs. S1+S2=(5.7±4.8) ng/mg, P.01〕. Cells immunoreactive for chymase were seen throughout portal areas and intralobular sinusoidal walls, largely colocalizing with fibrosis. Chymase appears to be involved in hepatic fibrosis in chronic hepatitis.

慢性肝炎纤维化分期重的S3和S4患者，其肝组织中Chymase浓度〔S3+S4=(31.3±24.6)ng/mg〕明显高于纤维化轻的S1和S2患者〔S1+S2=(5.7±4.8)ng/mg〕，P.01；免疫组化染色结果，Chymase标记的肥大细胞主要分布于纤维化旺盛的汇管区与类洞壁，其分布与纤维化部位相一致，且肝组织中Chymase浓度高的患者，其肝组织内Chymase标记的肥大细胞分布增多推测肝组织中Chymase浓度可能与慢性肝炎肝纤维化关系密切。

Studies on callus induction, adventitious shoot regeneration of Cirsium japonicum DC. var. takaoense Kitamura using leaf and stem-node as explants were conducted with different strength of MS medium, sucrose concentration and growth regulator combination in this investigation.

中文摘要本研究以白花小蓟无菌苗之叶片与茎节培植体为材料，进行不同MS培养基浓度、蔗糖浓度、NAA配合BA或TDZ浓度组合对愈合组织形成及不定芽诱导之影响。

In Rh2＋DDP group 1000uM cisplatine and 100uM gensenoside Rh2 were injected to nude mice by abdomen. Growth status of tumors were observed. Diameter of tumors were measured. After 60 days,〓Tc-MIBI were injected from vein of nude mice tail to perform SPECT exam and calculate the value R of the tumors. Later the nude mice were killed.

将A549DDP细胞和A549细胞分别种植于裸鼠皮下，种植A549细胞的裸鼠为A549组，种植A549DDP细胞的裸鼠分对照组、DDP组和Rh2+DDP组，每组4只裸鼠。A549组和对照组的裸鼠腹腔注射生理盐水，DDP组裸鼠腹腔注射低效浓度的顺铂；Rh2+DDP组裸鼠腹腔注射低效浓度的顺铂及无毒浓度的Rh2。

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！