半导体制造业的环境污染与清洁生产

在分析半导体制造过程中不同工艺产生的环境污染问题的基础上，讨论了半导体制造业开展清洁生产的原则和途径，介绍了一些成功的清洁生产方案。     

Characterization of marker chromosomes by microdissection and fluorescence in situ hybridization

We characterized by microdissection and fluorescence in situ hybridization (FISH) two marker chromosomes: (1) a de novo, acrocentric marker chromosome detected in 88 per cent of the amniotic fluid cells of one of two physically and developmentally normal twins; and (2) a metacentric marker chromosome present in a phenotypically normal female. Analysis of FISH probes developed from the marker chromosomes indicated that the marker chromosomes in cases 1 and 2 were del(14)(q11) and a derivative chromosome from a Robertsonian translocation, respectively. Microdissection in combination with FISH may prove to be a valuable technique in determining the chromosomal origin of de novo marker chromosomes and unbalanced structural rearrangements detected during prenatal diagnosis.     

Nitrogen removal in sequencing batch reactor

ＮｉｔｒｏｇｅｎｒｅｍｏｖａｌｉｎｓｅｑｕｅｎｃｉｎｇｂａｔｃｈｒｅａｃｔｏｒＷａｎｇＦｕｚｈｅｎ；ＰｅｎｇＹｏｎｇｚｈｅｎ；ＹｕＥｒｊｉｅ；ＬｉＢａｉｋｕｎ（ＨａｒｂｉｎＡｒｃｈｉｔｅｃｔｕｒａｌａｎｄＣｉｖｉｌＥｎｇｉｎｅｅｒｉｎｇＩｎｓｔｉｔｕ...     

汽油清净剂的研究应用及进展

随着环保要求的日趋严格及汽车工业的发展创新，开展汽油清净剂的研究和应用工作已势在必行。本文介绍了国内外汽油清净剂的发展过程、应用现状，同时还介绍了将清净分散剂、抗氧防腐剂、减磨剂、防锈剂等添加剂复合而成的汽油清净剂的研制情况。实验结果表明：该剂具有抑制和清除发动机燃燃油系统沉积物的性能，达到国外第三代同类产品的水平。