铅的

Trace lead in unleaded gasoline was determined by measuring its PAR complex at 490 nm.

研究了无铅汽油中痕量铅的快速测定方法。

In this paper both lead borate sealing glasses and lead free phosphate sealing glasses are studied.

本文研究了含铅的硼酸盐封接玻璃和无铅磷酸盐封接玻璃。

"Lead 铅",5,Lead in glass of cathode ray tubes, electronic components and fluorescent tubes.

2002/95/EC 阴极射线管、电子部件和发光管等玻璃内的铅含

"Lead 铅",24,Lead in solders for the soldering to machined through hole discoidal and planar array ceramic multilayer capacitors.

EC 通孔盘状及平面阵列陶瓷多层电容器焊料所含的铅

It can be used to flocculate, subside, and remove lead from waste water with low concentration of lead.

实验考察了螯合絮凝剂合成及从含铅废水中除铅的最佳条件。

The town is named for Galena, an ore of lead, lead sulfide.

该城市别叫做GALENA，一个储存有铅和硫化铅的矿区。

The results show that the intensity of the applied magnetic field has important influence on the dissolution of Pb, but the relationship of the concentration of the dissoluted Pb and the intensity of magnetic field is nonlinear, there is a best spot or range.

研究表明，外加磁场的大小对铅的溶出有着重要影响，但与溶出铅的浓度不是线性关系，而是存在一个最佳的点或范围。0.1T的磁场强度与pH=4.0的酸度条件下，最有利于铅的溶出。

In this paper,the preparation of tribasic lead sulfate from lead slag formed during tellurium extraction was studied.

研究了以脱碲铅渣为原料制备三盐基硫酸铅的工艺。

Chitosan had been modified by polyacrylate sodium, glularaldehyde, and NaBH4, respectively, which afforded three kinds modified chitosan: polyacrylate sodium modified chitosan (CIS- PA4) chitosan bead and pentamethylene diamido crosslinked chitosan bead (CTSB- G- Hy). The adsorption properties of CTS-CTSB and CTSB-G-Hy were studied by L25(56) orthogonal experimental design. They show high adsorption activities for Pb2+ in solution. The highest removal efficiency of Pb2+ for CTS-PA4, CTSB and CTSB-G-Hy is 94%, 96% and 93%, respectively. The results showed the adsorption property of CTSB is the highest. The CTSB- G- Hy has good mechanical property, acid-resistance and alkali-resistance.

第二部分壳聚糖的改性及其对水溶液中铅离子的吸附性能研究以壳聚糖为原料制备了三种改性吸附剂——聚丙烯酸钠改性壳聚糖(CTS——PA_4)、珠状壳聚糖凝胶树脂和戊二氨交联珠状壳聚糖凝胶树脂，着重考察了CTSB—G—Hy的制备条件，并考察了三种吸附剂吸附6.3mg/L铅离子水溶液中铅的最佳使用条件，结果表明对CTS—PA_4而言当pb~(2+)溶液的pH在4～6.5之间，吸附剂用量为5g/L，吸附时间为1h时pb~(2+)去除率高于94％，CTS—PA_4可在酸性条件下使用，在碱性条件下依然有效但处理效果较差；CTSB对pb~(2+)具有很好的吸附能力吸附剂用量为5g/L，吸附时间为1h时处理效果极佳，pb~(2+)去除率高于96％；CTSB—G—Hy对pb~(2+)具有一定的吸附能力，吸附剂用量为3g/L，吸附时间为1.5h时处理效果最佳，Pb~(2+)去除率高于93％，而且CTSB—G—Hy的机械强度高，耐酸碱性强，可在较宽的pH范围内使用。

The symmetry of the antiferroelectric phase of PbZrO3 was reinvestigated by the symmetry element analysis based on the projective figures given in the related literatures.

在参考文献给出的锆酸铅的反铁电相投影图的基础上，从生群元的角度重新研究了反铁电体锆酸铅的反铁电相的对称性，发现锆酸铅反铁电相的对称群应是P2/m，属于单斜晶系。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。