查询词典 selectivity

Were used; for filter-eeding experiment, the alga used was Nitzschia closterium, and the experimental temperatures were 20, 23, 26, 29℃.Results show that the feeding selectivity of small-ized bay scallop and the oyster increase with algae size:when the algae increased from 4.35m to 11.6m, the feeding rate of bay scallop increased from 4.21%to 11.0%and that of the Pacific oyster from 0.81%to 3.15%.

结果表明，海湾扇贝和太平洋牡蛎的小贝的摄食率随藻类规格的增大而增加；而大贝则表现出明显的差异，海湾扇贝对中等规格（＝5.55—5.79m）的藻类、太平洋牡蛎对小规格（＝4.35m）的藻类具有较高的选择性，表明相同条件下两种贝类对海洋浮游植物群落结构产生不同的影响。

This study was to find a new cationic collector with better selectivity and collectability than alkyl amine to realize the selective flotation of silica from the iron ore.

本文对新型CS系列阳离子药剂及常规阳离子药剂对石英、磁铁矿和镜铁矿三种矿物浮选行为的影响规律进行了系统的研究。

The flotation effect of BET was compared with that of the commonly used reagents GF and FS202. The result shows that although the usage of BET is only 1/10 and 1/100 of GF and FS202 respectively, the collectability and selectivity for pyrite and coal gangue is obviously better than that of using GF and FS202. In addition, it will not be influen...

结果表明：尽管 BET的用量分别是 GF，FS2 0 2用量的 1 /1 0和 1 /1 0 0 ，但对黄铁矿、煤矸石等捕收性和选择性明显优于 GF，FS2 0 2 ，且不受 p H条件的影响；与其它 3种同系物(AET，DET，HET)在脱硫降灰方面综合比较表明，BET的效果最好，具有用量少、选择性强等优点，是一种应用前景良好的煤炭浮选药剂。

In the pH range of 6~12, the results of the flotation tests indicate that the performance of the new combined cationic collector (CS3:CS1=3) and (CS3:CS2=2) is similar, and they are effective collectors for reverse flotation of the iron ores. The combined cationic collectors exhibited the same collectability as dodecylamine, but better selectivity than dodecylamine. By using the combined collector, the dosage of the collector decreased from 1 10-4mol/L to 1 x 10-5mol/L .

单矿物可浮性试验结果表明，在pH=6～12的范围内，新型组合药剂CS_3：CS_1=3和CS_3：CS_2=2具有相近的药剂性能，在其捕收能力与十二胺相当的前提下，不但选择性较十二胺好，而且还能显著提高药剂的协同效应，使药量从单用时的1×10~(-4)4mol／L降至1×10~(-5)mol／L，是铁矿石反浮选的高效捕收剂。

The removal of silica to produce pure iron concentrates is a dominant way for iron-ore dressing at present. In order to solve the problems, such as bad selectivity, sticky bubbles, weak collectability at low temperature by using fatty amines to fulfil the reverse flotation of iron ore in a iron Mine in AnShan.

提铁降硅生产高纯铁精矿是当今铁矿选矿的主导发展方向，为解决鞍钢某铁矿使用常规脂肪胺类阳离子反浮选工艺存在的选择性较差、浮选泡沫粘度大，以及矿浆需要加温等实际问题，本文围绕开发或寻找新型高效阳离子反浮选药剂进行了系统的试验研究。

However, electron-withdrawing groups that have conjugative effect in molecule can increase complex ability, sensitivity and selectivity of fluorone reagents. From the experiment, it is clear that microemulsion media have more excellent solubilization and sensitization than micelle and water media.

而具有吸电子效应和共轭效应的基团，可以改变显色剂分子的电子云分布，使分子的共轭程度增大，使反应官能团羟基质子较容易离去，增加了显色剂与金属离子的成络能力，从而提高了试剂的灵敏度和选择性。

ZHOU JI GOODS CIRCULATION CO.,LTD.helds throughly that is profession,research,selectivity,coorperats continuantly,with CHINA HUALU,CHANGSHUN FIRST AUTO MANEFACTURE JILIN CHEMICAL INDUSTRY,HAFEI GROUP,DALIAN.we like to go to victory by sincerely service,good reputation with famous.

洲际物流有限公司将秉承&专业、专注、专心&的经营理念，继续与中国华录、长春一汽、吉林化工、哈飞集团、大连东芝等大集团、大企业友好合作，再续辉煌；并愿以真诚的服务、良好的信誉与国内外著名的集团、公司、企业携手，互惠多赢，共创美好的明天。

The main volatile compounds were recorded, such as à-Cubebene (1.470%), Copaene (3.686%), C-Muurolene (3.152%, Eremophila-1(10), 11-diene (30.145%), Longifolene-(V4)(5.653%), Cadina-3, 9-diene (15.152%), Copaene (1.232%). The SPME fiber shows better selectivity and sensitivity toward some fragrance compounds comparing with other method.

主要挥发组分如：荜澄茄à-Cubebene (1.470%)、胡椒烯Copaene (3.686%)、衣兰油烯C-Muurolene (3.152%)、雅槛兰－1(10)，11-二烯Eremophila-1(10)，11-diene (30.145%)、长叶松萜烯Longifolene-(V4)(5.653%)、杜松－3，9-二烯Cadina-3，9-diene (15.152%)、古巴烯Copaene (1.232%)等。

The addition of small amounts of H2O and NaOH to the reaction system improved the catalytic activity but decreased the selectivity of crotyl alchol.

结果表明，反应体系中水和氢氧化钠的引入，可提高催化活性，但降低了选择性。

However, the selectivity and the yield to cyclohexene significantly increased with an increase of the Zn content.

钌和锌必须紧密结合才能得到高的环己烯的产率。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。