浓度

Influence of the concentration of Cr in the leachate and quantity of Pb(CH3COO)2 of Pb(NO3)2 on the reaction of synthesizing yellow chrome was also studied. Finally, according to the criterion and standard method in GB3184-82, some yellow chrome synthesized in the experiments was sampled and the concentration of PbCrO4 in these samples was determined. The following conclusion can be drawn from these experiments.

根据中华人民共和国国家标准GB3184-82中的规定铅铬黄颜料的技术质量指标和检测方法，测定了铬黄样品中铬酸铅含量的厂迄回【、矾士牢位论父泅仰yW盯皿'S川mS达标情况，结论如下：门）反应中重铬酸盐的浓度并不需要达到前人所提出的150～2509·L'的范围，在一定条件下低于此浓度时对铬黄生成反应并无不利影响。

After the wastewater was treated by using lead chrome yellow production technology in fact, the concentration of hexavalent chromium was 0.361 nig/L, pH value was 6.24, the concentration of total chromium was 0.963 mg/L and CODer was 67.200 mg/L. The standard exponents of all indices were all teas than 1, so the standard-attainment discharge could be realized.

采用铅铬黄生产工艺实际治理污水后，6价铬浓度为0.361 mg/L、pH值为6.24，总铬浓度为0.963 mg/L，CODcr为67.200 mg/L，各项指标标准指数均小于1，可以实现达标排放。

Result In the first 4 d of experiment, the corrected mortalities of spore suspensions with various concn. of P. cicadae APC20 to P. xylostella were lower than 50%, but on the 7 th day, that of spore suspension with concn. of 3.0×10^8 spores/ml reached 85.11% and the insect corpses was bestrewed in the mycelium and spore powder of P. cicadae, indicating that APC20 showed stronger parasitic lethality to P.

结果］药后第1~4天，蝉拟青霉APC20各个浓度的孢子悬浮液对小菜蛾的校正死亡率均低于50%，而第7天，浓度为3.0×10^8个／ml的孢子悬浮液对小菜蛾的校正死亡率达85.11%，并且虫尸布满蝉拟青霉的菌丝体和孢子粉，说明APC20对小菜蛾呈现较强的寄生致死性。

The structure of the Schiff base was characterized by FTIR and XRD spectroscopy,which confirmed that the amino groups in chitosan have been reacted with citral to form the Schiff base.

对大肠杆菌、金黄色葡萄球菌和黑曲霉的抗菌实验表明，该产物对大肠杆菌、金黄色葡萄球菌和黑曲霉的最低抑菌浓度分别为1 g/L、1 g/L和5 g/L，其抗菌活性随浓度的增加而增加，且优于壳聚糖。

Compared with the blank controls, aldrin at concentrations higher than 80 μg/L decreased life expectancy at birth and net reproduction rate of maternal generation of the cladoceran, and that at concentrations higher than 160 μg/L shortened generation time and decreased intrinsic rate of population growth.

与空白对照组相比，浓度高于80μg/L的艾氏剂使多刺裸腹溞母代的生命期望和净生殖率显著降低；浓度高于160μg/L的艾氏剂使母代的世代时间显著缩短，种群内禀增长率显著降低。

The velocity in the middle lower part of the clarifier was higher.

池内存在着明显的泥水界面，污泥层中相当大的部分是等浓度区，污泥层底部是浓度较高的压缩区。

Based on the observation data of aerosol particles in 2004 in Chaozhou coastland,the inorganic ion concentration distribution of atmospheric aerosol and the effect of meteorological element on them were analyzed.

根据2004年广东潮州沿海地区的气溶胶浓度观测资料，分析潮州沿海大气气溶胶无机离子浓度分布特征及气象要素对其的影响。

To study changes of the activity of iNOS in the liver and the concentration of NO in blood serum and NO' effect on inhibiting or killing coccidia,rabbits infected with Eimeria stiedai were injected with different concentrations of the substrate of NOS—L—Arg and the inhibitor of iNOS—L—AG through the abdominal cavity.

本试验以腹腔注射的途径给予斯氏艾美耳球虫感染家兔不同浓度的一氧化氮合酶底物L-精氨酸和诱导型一氧化氮合酶抑制剂L-氨基胍，对家兔球虫感染时血清中NO浓度和肝的iNOS活性及各试验组家兔的病变进行了研究。

At low temperature (700℃), NO〓 emission increases considerably with excess air coefficient, at 800℃ NO〓 emission is almost independent of excess air coefficient, and at 900℃ NO〓 emission is zero indicating that this temperature is the optimal operating temperature.

稀相区出口浓度为零，密相区内NO和NO〓浓度随氧量增加而减少，说明在900℃下，氧量增加促进NH〓(i=0，1，2)对NO〓还原。

The main resultsare as follow: It is easier to regulate environment factors in optimizing sunlight greenhouses than incommon ones, and suitable chemical type and concentration treatment for CommonCallalily are found. 100 mg/L GA_3、150 mg/L Al_2(SO_4)_3、200 mg/L8-HQC were the besttreatments, which prolonged respectively 8.6 days, 8.3 days and 8.0 days. The vase lifewere 21.12%, 18.57% and 12.68% higher than collator.

结果如下：基于前人研究结果，选择若干对延长切花保鲜寿命有显著作用的化学药剂，设计不同浓度梯度作为马蹄莲切花的预处理液，筛选最佳药剂种类及其浓度。100 mg／LGA_3、150 mg／L Al_2(SO_4)_3、200 mg／L8-HQC处理均能显著延长马蹄莲切花瓶插寿命，分别达到8.6d、8.3d和8.0d，比对照延长了21.12％、18.57％和12.68％。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐