浓度

The typical apoptotic morphological features appeared in MUTZ-1 cells treated with 4mmol/L VPA for 72hours. Pyknosis of cells and nuclei, disintegration of nuclear chromatin and apoptotic body could be observed by light microscopy. Aggregation and margination of nuclear chromatin, concentration of plasm, increment of density and chromatin mass of irregular size could be observed by transmission electronmicroscope. The flow cytometric analysis indicated that the VPA could induce cell apoptosis, apoptosis rate increased in dose-dependent manner, ratio of cells at G0/G1 phase increased and ratio of cells at S phase decreased in dose-dependent manner, the cells were arrested at G0/G1 phase.

结果显示：VPA对MUTZ-1细胞的生长抑制作用呈现时间和剂量依赖性；经4mmol/LVPA处理MUTZ-1细胞72小时后，细胞呈现典型的凋亡形态特征，光学显微镜下可见凋亡细胞胞体固缩、核固缩、核碎裂及凋亡小体；透射电子显微镜下可见凋亡细胞核染色质边集、胞浆浓缩、密度增加，胞装内大小不规则的染色质团块；流式细胞术结果表明，细胞凋亡率随着VPA浓度的增加而逐步增高，G0/G1期细胞比例随着VPA浓度的增加而逐渐增多，S期细胞比例逐渐减低，细胞被阻滞在G0/G1期。

The system employs electronic measuring circuit and MCS-96 series of monolithic processor as master processor, and uses a coulometric cell based on coulometric titration principle as the sensor of the system.

介绍一种利用库仑池滴定原理研制的库仑池做传感器，以电子测量电路和MCS-96系列的单片机做主机组成的多通道、多功能的浓度监测与超限浓度自动报警系统。

A mathematical formula is based on the relationship between solution concentration and refraction angle.

分析了临界光线的折射角与其浓度的关系，给出溶液浓度与折射角之间的简单数学解析式。

Concentration of ammonia and weather data is collected by ammonia measurer and weather station to analyze the interaction between them.

架设氨气量测器与气象站，搜集养猪场的氨气浓度与气象资料，进行气候条件与氨气浓度比较。

Methods The cells were divided into 5 treatment groups（10,25,50,75 and 100 μmol·L-1 QUE）, blank control and menstruum control group. The rat C6 cells were cultivated to 1×106·mL-1 in the RPMI 1640 medium, then added into 96 holes board with various doses of QUE by 3 holes per group,and MTT assay was used to observe the proliferation of the cells treated for 24,48 and 72 h. The change of cell cycle was also observed by flow cytometry after the cells were treated with 50 and 100 μmol·L-1 QUE for 48 h. The changes of the protein P53 and Bcl-2 of C6 cells treated with 50 μmol·L-1 QUE for 48 h were detected by immunocytochemical methods.

按QUE浓度分成10、25、50、75及100 μmol·L-15个处理组和空白对照组及溶剂对照组，大鼠脑胶质瘤C6细胞在RPMI 1640培养基中生长达1×106·mL-1后，在96孔板中分别加入上述浓度的QUE继续培养，每组设3复孔，作用24、48及72 h，采用MTT比色法检测QUE对大鼠脑胶质瘤C6细胞的增殖抑制情况，流式细胞术对50及100 μmol·L-1的QUE作用48 h的大鼠脑胶质瘤C6细胞进行周期分析，免疫组化法检测50 μmol·L-1的QUE作用48 h 的p53和bcl-2基因产物。

Results: The good linear range of method was 10 to 1000μg/ml (T=0.9999) with the correlation coeffivient of 0.9999, and the limit concentration in air was 0.2 mg/m^3 with the average relative standard deviation less than 5%(n=6). The average sampling rate ranged from 96.6 to 100%, and the breakthrough capacity of l00mg activated charcoal was 4.7mg. The average desorption rate was 97.6%, and mesityl oxide absorped in activated charcoal tube was stable for 7 days and can be detected accurately with other gas coexisting in the air of workplace.

结果：异亚丙基丙酮浓度在10~1000μg/ml内呈良好线性关系，相关系数0.9999，最低检出浓度为0.2mg/立方公尺，相对标准偏差＜5%(n=6)；气体采样效率≥96.6%，100mg活性炭对异亚丙基丙酮的穿透容量为4.7mg，平均解吸效率97.6%；活性炭样品室温下可保存7天；丙酮、丁酮、异佛尔酮、苯、甲苯、二甲苯等共存物不干扰测定。

In this paper, we studied the relationshipbetween the concentration, acidity, temperature, heavy metalic ions and the fluorescencequenching of fluorescein. The result showed that when the concentration was over 1. 55 ×10-5 mol/L, the fluorescence quenching strengthened with the increase of f...

结果表明：荧光素浓度大于1.55×10－5mol·L－1时，随着浓度增大，荧光猝灭作用增强；酸度对荧光猝灭作用有明显作用，PH值小于8.5时，随着PH值升高而减弱，PH值大于8.5时，随着PH值升高而增强；温度对荧光猝灭作用呈线性关系，温度升高，荧光猝灭作用减弱；重金属离子对荧光猝灭有显著的作用，是影响眼底血管造影质量的重要因素。

Crystal lattice constants are close to other experiment results. Three kinds of chemical bonds exist among Mg and B atoms, between magnesium and boride is ionic bond and metallic bond is the predominant interaction in the layer formed by magnesium atoms. A strong covalent bond in the form of sp2 hybrid between boride atoms is the most important factors which can affect the transition temperature of MgB2. Population analysis clearly shows that electrons are transferred from Mg to B, as a result, the electron-phonon coupling in the layer of B is very strong.

规范保守赝势的计算结果表明，晶格常数与实验值误差在很小的范围内，分析了引起MgB2(001)面结构超导转变时电子浓度和偏态密度的变化情况，发现构成该超导体结构的成键有3种，着重从结构的电子浓度变化分析了其超导特性，六角蜂窝状结构中硼原子间相互作用为sp2杂化的共价键，镁原子和硼原子之间是离子键结合，镁原子层是金属键结合，镁原子的价电子部分转移到硼原子的pz轨道，部分电子为镁原子层共用。

Hemodynamic data, nitrogen dioxide (NO2) and methemoglobin concentrations were measured while increasing concentrations of NO were administered (0, 10, 20, 40, 80, 120 parts per millio n).

吸入不同浓度NO（0，10 ，20，40，80，120ppm）。在各时相分别进行血液动力学指标、二氧化氮和高铁血红蛋白浓度监测。

By using water bath method that an aqueous solution of zinc nitrate（Zn（NO3）2·6H2O）reacted with an aqueous solution of equimolar methenamine（C6H12N4）,ZnO nanomaterials with controllable morphologies are successfully prepared. The influences of solution concentration and substrates on morphology of ZnO nanomaterials are discussed.

用硝酸锌（Zn（NO3）2·6H2O）与六亚甲基四胺（C6H12N4）以等浓度配制成反应溶液，通过水浴法制备出了形貌可控的棒状ZnO纳米结构，讨论了不同反应浓度及衬底对ZnO表面形貌的影响。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。