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以高浓度电泳漆废水用酸性凝聚和碱性凝聚进行处理研究,应用结果表明,在控制PH=2.5~3条件下进行酸性凝聚,COD去除率可达91%~93%酸性凝聚后出水,与低浓度废水混合,再用PFS为凝聚剂,控制PH=7~9,进行凝聚气浮处理,可使排放水质中COD,PH,SS和色度稳定达标。 相似文献
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P. Kirk Visscher 《Behavioral ecology and sociobiology》1996,38(4):237-244
Using electrophoretic markers, eggs laid by workers were identified in honey bee (Apis mellifera) colonies with a queen. Based on extrapolation, these represented about 7% of the unfertilized (male) eggs laid in the colonies.
A very small proportion of workers (of the order of 0.01%) lay these eggs. Worker-laid eggs are rapidly removed, so that very
few sons of workers are reared. Thus the reproductive cooperation in bee colonies is maintained by ongoing antagonistic interactions
among the members of the colony, with worker laying and egg removal policing by other workers being relatively common.
Received: 24 November 1995/Accepted after revision: 25 May 1996 相似文献
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Amniotic fluid from 72 pregnancies at risk for mucopolysaccharidosis have been analysed for glycosaminoglycans (GAG) by means of two-dimensional electrophoresis. Definite results were obtained in all cases and required only 3 days to report. Of the 66 cases for which GAG analysis was accompanied by enzyme assays on cultured amniotic fluid cells, there was agreement of results in 65. In the one case of disagreement the result of GAG analysis proved to be correct. Fourteen pregnancies were predicted to be affected and the predictions were confirmed by studies on fetal tissues and/or cultured cells, or in one case the birth of an affected infant. Of the 58 pregnancies predicted to be unaffected, 48 have so far gone to term and produced healthy infants. There have been no false negative predictions. The analytical method is simple, rapid, and, in this study, has been found completely reliable for prenatal diagnosis. 相似文献
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收集Carrousel 2000型氧化沟工艺启动过程中活性污泥样品,直接提取微生物的基因组DNA并纯化,然后对细菌16S rDNA的V3高变区进行PCR扩增和DGGE分离,通过比较DGGE图谱的相似性来研究工艺调试过程中微生物种群的变化情况.研究表明,活性污泥中具有非常丰富的微生物种群.调试初期水质波动对氧化沟中微生物种群的影响非常明显,但接种的成熟活性污泥中微生物种群能够很快适应新型氧化沟工艺的结构及水力特性.调试从4月开始,4月氧化沟中微生物种群相似性Cs最大值为68.9%,5~6月Cs最大值为70.8%,8月Cs最大值为73.0%,可见氧化沟中微生物种群相似性逐渐增加,直至稳定.在此过程中,系统对COD、氨氮的处理效果同步提高并趋于稳定.综合分析好氧活性污泥在氧化沟中驯化期为2个月.图4表4参12 相似文献
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