浓度

The mass loss patterns of four type litters fitted exponential model, and the decomposition rate could be well predicted by their lignin/N ratio.

结果表明：与对照相比，降水量减少条件下，蒙古栎叶凋落物的初始N、P、K浓度显著升高，初始木质素浓度显著降低，凋落物分解速率大，N、P、K矿化率高，N和P固持时间缩短；降水量增加情况下，其凋落物初始N浓度显著降低、木质素浓度显著升高，N、P、K矿化率低，N和P固持时间延长。4种类型叶片凋落物的质量损失过程均符合指数降解模型，分解速率可以由凋落物木质素／N来预测。

The osmotic coefficients and saturated vapor pressures have been calculated at the different temperatures .The experimental values of the osmotic coefficients for the Li_2SO_4-H_2O system were consistent with the values in the references. The results revealed the rules of the changing in osmotic coefficients and saturated vapor pressures with ion strengths and the molality fractions of Li_2B_4O_7 at different temperatures. The isopiestic equilibrium molalities were correlated by using the modified and the extended Zdanovskii rules for non-ideal mixtures, and obey well the Zdanovskii rules. The ion interaction parameters of Pitzer model have been determined by using the two methods for Li_2SO_4-Li_2B_4O_7-H_2O at 298.15K system.

本文计算了不同温度下该纯盐体系和混合盐体系的渗透系数和饱和蒸汽压，并将298.15K下的纯盐溶液渗透系数的实验值与文献值进行比较，取得了相一致的结果；揭示了不同温度下渗透系数和饱和蒸汽压随离子强度及Li_2B_4O_7质量摩尔浓度分数yb的变化规律；本文用Zdanovskii规则修正式和扩展式关联了298.15K下该混合盐体系的等压平衡浓度之间的关系，计算结果表明用这两个方程可以描述该体系在全浓度范围内的等压平衡浓度间的关系。

Methods In vitro, human gastric cancer cell line SGC-7901 in log phase was intervened by As_2O_3 (final concentrations in order:1.0,5.0,10.0μmol/L) and 5-Fu (final concentration:50mg/L) respectively alone or in combination, and incubated for 24h、 48h、 72h. Blank group is set up. The cell apoptosis and cell cycle changes were observed by flow cytometry, and the expression of apoptosis-related gene Bcl-2 was analyzed by immunocytochemical method and absolute gray scales quantitative method.

将对数生长期的人胃癌细胞株SGC-7901(终浓度为2×10~5)经低、中、高三种浓度的As_2O(终浓度分别为1.0，5.0，10.0μmol/L)和5-Fu(终浓度50mg/L)单独及联合处理，设空白对照组，分别孵育24h、48h、72h后，收取标本采用流式细胞术测定细胞凋亡率及细胞周期变化；免疫组化绝对灰度定量分析检测凋亡抑制基因Bcl-2的表达。

This article studies the conception of safe oxygen content by theoretical and experimental researches, and discusses the simple method to decide minimum oxygen density and critical value of oxygen density by chemical calculation and graphing method, and elementarily analyses the connection between minimum oxygen density and critical value of oxygen density.

理论上分别通过化学计算法和作图法探讨了最小氧浓度和临界氧浓度的简单确定，并初步分析了最小氧浓度与临界氧浓度的关系。

Even if energy saving window could be work when the molarity was decreased, but might not phase separation in real situation.

经比较可以发现当浓度降低其节能效率下降、临界溶解温度范围提高、反应速度加快，虽然浓度降低仍可以达到节能的目的且反应速度加快，但临界溶解温度范围提高可能使实际运用上会有所困难，有机会产生节能窗材无法相分离的情形，加上在低体积莫耳浓度时相分离后水胶粒子会沉淀的现象，使节能窗材无法顺利运作，故实际运用上不适合降低节能窗材的浓度。

It is shown from the study results that (1) SSC has obvious neap-spring and seasonal variations with periods being 14.7 days and 368 days, respectively, on an average, SSC during the spring tide was 2.96 times as much as that during the neap tide, and SSC in winter was twice as much as that in summer;(2) correlation coefficient between daily SSC and tidal range on the same day in a mean neap-spring period of 15 days was 0.86, and correlation coefficients between tidal range and daily SSC with one day and two day lag were 0.99 and 0.93, respectively, which indicates that the effect of tidal range variation on SSC has a one day or two day hysteresis;(3) the monthly mean SSC was negatively correlated with the monthly mean water discharge at the Changjiang River Datong station, especially well with the water discharge with a lag of 19 days.

悬沙浓度具有显著的大、小潮和季节性变化，变化周期分别为14.7 d和368 d，平均而言，大潮为小潮的2.96倍，冬季为夏季的2倍；2）平均大、小潮半月周期中日悬沙浓度与同日潮差之间的相关系数为0.86，与前1日潮差之间的相关系数为0.99，与前2日潮差之间的相关系数为0.93，反映潮差变化对悬沙浓度的影响有1~2d的滞后效应；3）月均悬沙浓度与长江大通站的月均流量呈显著负相关，尤其与流量滞后19d的相关性最好。

The experiment is began with the runoff quality on the diverse roofage and different grade roadway, the results are as follows:(1) The concentration of contamination is different with the diverse roofage, and SS value is also different with the style roof;(2) In the beginning , the concentration of COD value and SS value is higher ,but the runoff quality will be reduced to steady gradually along with the rainfall duration increase;(3) The city roadway runoff is worse than the roadway of university ,because the city roadway runoff involve vehicle n people and the sanitation and material of roadway;(4) Based on the analysis of rainwater quality , the paper provide the process of rainwater treatment for roof, roadway, and lawn.

对教学区内不同建筑物，及道路上的雨水径流水质进行监测，得出以下结论：(1)材料不同，径流雨水中污染物浓度不同，屋顶类型不同，径流雨水中SS浓度亦不同；(2)初期径流污染物浓度很高，随降雨历时的延长，COD和SS浓度逐渐下降并趋于稳定；(3)道路污染与路面材料、来往车辆、人员流动、路面卫生状况有关。市区道路相比校园内道路，水质较差；(4)对雨水水质分析基础上，分别对建筑屋顶、道路、绿地提出雨水利用的处理工艺。

Finally the extracted protein then was used as an ingredient in one drink which is a good drink in the summer. Other ingredients include saccharose,β-cyclodextrin. The normal experiment showed 3% of saccharose, 10% of orange juice, 0.1% of citric acid, 2% of β-cyclodextrin is the best ingredients combination.

通过与选定的蔗糖、橙汁及β-环糊精为辅料研制了适合夏天饮用的蛋白饮料，通过正交实验确定了最佳工艺组合为蔗糖浓度为3％，橙汁浓度为10％，柠檬酸浓度为0.1％，β—环糊精浓度为2％。

The effect of BBS on cell spreading was detected by cell scratch test and millicell test. Results Proliferation of PC-3 and DU-145 cells was observed with different concentrations 10^(-10-10^(-5)mol/L. The cell growth could be inhibited by BBS receptor antagonist. In addition, teleconcentration 10^(-6)-10^(-5)mol/L BBS could stimulate cell adhesion and spreading best.

结果 ①不同浓度10^(-10-10^(-5)mol/L的BBS可促进细胞增殖，并呈现一定浓度依赖性，而其受体拮抗剂具有相反作用；②终末浓度10^(-6)-10^(-5)mol/L的BBS提高细胞贴壁率效果最佳，其受体拮抗剂则降低细胞贴壁率；③不同浓度的BBS可提高细胞播散能力。

It is shown from the study results that when the CDOM concentration ρ≥62.5mg/L, there was only a peak in the EEMS spectrograms, the excitation and emission wavelengths moved blue with decreasing CDOM concentration, and the move in wavelength and the change in CDOM concentration were well correlated; when ρ≤52.5mg/L, there were 3 peaks in the EEMS spectrograms, and the EEMS spectral shapes were basically invariant when the CDOM concentration changed.

结果表明：当CDOM质量浓度ρ≥62.5mg/L时，其EEMS均为单一峰，随着质量浓度降低，激发和发射波长向短波长方向移动，这种波长移动变化与质量浓度的变化呈良好的线性相关关系；当ρ≤52.5mg/L时，其三维荧光光谱显示3个峰。质量浓度在此范围内变化时，EEMS谱形基本不变。

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。