四氟乙烯清洁生产工艺和污染控制

分析了传统空管裂解生产四氟乙烯工艺存在的污染问题 ,介绍了水蒸汽稀释裂解生产四氟乙烯工艺的污染控制情况。     

SBR工艺处理城市垃圾渗滤液的可行性分析

在参考国内外垃圾渗滤液的处理方案后，选择厌氧预处理 SBR工艺作为处理方案，通过实验对该废水处理的情况来看，该工艺较好地适应了垃圾渗滤液的处理特点，能达到比较良好的效果。     

将清洁生产理念融入到老工业基地的技术改造中

阐述了清洁生产和技术改造之间的关系，并通过实例进行了说明，得出将清洁生产理念融入到老工业基地的技术改造之中是企业实现经济和环境双赢的有效途径。     

关注全球气候变化,提高抵御气候灾害的能力

我国是个受全球季风气候影响较大的国家。受全球气候变暖的影响,云南梅里雪山的明永冰川已发生后退现象,西双版纳也已出现一些变化的前兆。为维护生态安全,云南省应统筹好人与自然和谐相处的关系,防止人为决策失误造成的区域性生态系统结构的破坏,同时要加强有关气候变化对云南影响的预警研究。     

An investigation of methods for enriching trophoblast from maternal blood

Trophoblast deportation is known to occur in normal human pregnancy, but it is not yet clear whether these cells routinely enter the maternal peripheral circulation and are available as a source of fetal DNA for non-invasive prenatal diagnosis of genetic disorders. To resolve this issue requires an efficient method of enriching trophoblast from maternal blood combined with a means to confirm its identity. Five different techniques were tested on ten retroplacental blood samples to determine the most sensitive and operator-efficient method. Lysis of red cells alone gave the best recovery of trophoblast but had to be discounted, together with Ficoll density gradient centrifugation, due to the very low purity and the excessive time required. Fluorescence-activated cell sorting (FACS) of pre-enriched trophoblast resulted in the lowest recovery rate (8 per cent) despite a 3250-fold enrichment and a very high purity. Immunomagnetic beads (Dynabeads) coated with anti-CD 16 antibody proved to be the best method for the subsequent immunocytochemical characterization of deported trophoblast. However, IO beads coated with anti-CD45 antibody may be more useful for isolating trophoblast for prenatal diagnosis due to the high purity, enrichment (32-fold), and recovery rate (78 per cent) obtained with this method.     

华南玄武岩红土化过程中微量元素地球化学

广东、海南的玄武岩．在强烈的红土化过程中．元素在红土剖面中发生迁移和残留、贫化和富集。根据红土化过程中元素的地球化学性状，将元素划分为活泼元素和不活泼元素两大类。并首次采用了元素它集因子这个概念来探讨红土化过程中微量元素的地球化学行为。最后讨论了红土化过程小金的表生富集作用。     

Prenatal investigation of a 45,X/46,X,r(?) karyotype in amniocytes using fluorescence in situ hybridization with an X-centromeric probe

The karyotype of cultured amniotic fluid cells obtained on the indication of advanced maternal age was shown to be a mosaic 45,X/46,X,r(?). The small size and banding pattern made it difficult to determine whether the ring was derived from and X or a Y chromosome, or even from an autosome. By using an X-centromeric probe and fluorescence in situ hybridization (FISH), we demonstrated the ring to have an X centromere. Thus, a more complete genetic counselling was possible. This confirms the usefulness of FISH in identifying and characterizing this and other chromosome rearrangements in prenatal diagnosis.     

建筑物地基安全性监测

建筑物地基安全性监测是及时掌握建筑在施工和最初使用阶段地基是否出现异常变形的重要方法。本文根据大量工程监测实践，分析了建筑物地基安全性异常的表现形式及产生原因，总结了建筑物安全性监测应注意的几个问题。     

地勘单位安全工作现状及强化安全管理对策和安全管理工作思考

本文针对目前地勘单元安全工作的现状，提出强化安全管理的对策，并结合当前国内安全生产的严峻形势，对安全管理工作进行了思考。     

生态技术创新政府启动模式的机理与启示

生态技术创新是经济可持续发展的必要条件。由于环境资源的公共性，时滞性等特点，政府在生态技术创新过程中发挥重要的作用，是企业生态技术创新的主要推动力。政府启动模式的本 于政府借助法律或经济手段促使企业部分边际外部费用内部化。