分离筛

First of all, four kinds of flocculating microbes with goodflocculating ability which were B-04、B-20、B-47 and M-03 were obtained by enrichment,first selection and reselection from three kinds of activated sludges .

首先从三种不同的活性污泥中通过富集、初筛、复筛，分离出了四种絮凝性能良好的絮凝菌株：B-04、B-20、B-47、M-03。

The principle of DNA separation with polymer solution by CE and MCE was described.

阐述了利用高聚物筛分介质分离DNA的原理，并综述了筛分介质研究的现状。

In this paper, adopted augmenting culture in nitrite bacteria culture media and the method of silica gel plate isolation,31 strains of bacteria were isolated from vegetable garden soil of our school. The color reaction test was carried out with Griess reagent and culture fluid, which was regarded as the index to determine producing NO2- or not. 13 strains which color were deep were obtained and they were further rescreened by doing nitrite test. A strain N4(coded N4,the same to the following)with higher rate of nitrosification was picked up after rescreened; A strain B08( coded B08 ,the same to the following) with higher rate of denitrification was obtained after isolated and rejuvenated from our lab conserving mixed denitrifying bacteria culture.

本研究采用亚硝化细菌富集培养基选择培养和硅胶平板分离法，从本校农场菜园土中分离到31株细菌，以格利斯试剂对培养液的反应颜色深浅作为指标衡量其产NO_2~-的多少，经初筛从分离株中筛选出13株格利斯试剂反应颜色较深的菌株，再对这13株菌作亚硝化试验，最终选出一株亚硝化速率较高的菌株(编号为N_4，下同)；另外，通过对本实验室保存的反硝化细菌混合菌液进行分离复壮，筛选出一株反硝化速率高的菌株编号为B_

PDA(particle dynamics analyzer system) was used to measure the flow velocity of particles in the XFD-12 flotation cell, the results show that tangential mean velocity in the radial direction changes from positive to negative in the flotation cell, naught point emerge in the medium of the radial direction ,it is where backward fluid emerge ,shear stress of backward fluid induce the particle detachment from bubbles .

汁算数据与实际矿石筛析结果都表明，紊流强度增大，泡沫中粗粒级含量减小。 4。用PDA在XFD-12型8L浮选机中测定的速度值，进行混合区、分离区、泡沫区紊流运动功率谱计算，得紊流脉动频率，混合区小于20Hz，分离区在20-30Hz之间，泡沫区在25-35Hz之间，浮选槽内紊流脉动以低频为主，且紊流脉动动能是混合区大于分离区大于泡沫区。

In this paper, adopted the method of microorganism pour plate, 28 strains of filiform fungi were isolated from edible fungi waste of our school .Kaolinite suspension was flocculated by the culture broth ,which was regarded as the index to determine flocculating activity and ability to produce flocculant. 10 flocculant-producing strains which had higher flocculating activity were obtained and they were further rescreened.

以发酵液对高岭土悬浮液絮凝效果为指标衡量其絮凝活性及产絮凝剂能力，经过初筛从分离株中筛选出10株具有较高活性的絮凝剂产生菌，并对这10株菌株进一步作复筛试验，最终选出其中一株絮凝剂高产菌暂时定名F_

Therefore produce good condition and make the materials smaller than the output granularity, especially the big-density materials and pulp get through the sieve pore together.

从而造成了较好的分离条件，使小于分离粒度的物料，特别是比重大的物粒和矿浆一起透过筛孔成为筛下产物。

Features: high efficiency, small amplitude and high frequency of screening; it differs from the conventional screens with breaking of the surface tension of pulp and small granularity high speed vibration on sieve cover and accelerates the separating of large-density useful mines and increase the contacting probability of the materials smaller than output granularity and the sieve pore.

高频筛效率高、振幅小、筛分频率高。与普通筛分设备的原理不同，由于高频筛采用了高频率，一方面破坏了矿浆表面的张力和细粒物料在筛面上的高速振荡，加速了大密度有用矿物和析离作用，增加了小于分离粒度物料与筛孔接触的概率。

The optimized sieve parameters reduce the vertical amplitude of the sieve backend, making the grains go easily through the sieve pores to be separated, and consequently help to reduce the grain loss rate and impurity rate.

优化后得到了较优的振动筛参数，有利于减小振动筛后端的垂直振幅，使得谷粒更容易穿过筛孔完成分离，有利于减小损失率和含杂率。

Various screening equipments used in city garbage process, such as vibratory screen, grid and roller screen, can be classified as binary separating equipment.

城市生活垃圾处理过程中的各种筛分设备，如振动筛、格筛、滚筒筛等均可视作是二进制的分离设备。

Various screening equipments used in city garbage process, such as vibratory screen, grid and roller screen, can be classified as binary separating equipment.

城市生活垃圾处理过程中的各种筛分设备，如振动筛、筛、筒筛等均可视作是二进制的分离设备。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。