金堆城超大型钼矿床水-岩δD-δ~(18)O同位素交换体系理论模型及成矿流体来源

基于水-岩δD-δ18O同位素交换体系理论模型的建立和计算，对金堆城超大型斑岩钼矿四个不同成矿期中成矿流体的演化和来源进行了研究，发现在成矿前期和早期，成矿流体为岩浆水与围岩在较低水／岩比值（0．1W／R＞0．001）和中、高温（t=250～500℃）条件下反应后的残余流体，而主成矿期和成矿晚期的成矿流作为大气降水在相对较高水／岩比值（0．5＞W／R0．1）和中、低温（t＝150～310℃）条件下与围岩反应后的残留流体。大气降水在金堆城钼矿成矿过程中起了重要作用。在主成矿期水／岩比值达到最高。     

深井曝气法处理环氧丙烷皂化废水

对深井曝气工艺处理高盐，高ｐＨ、高温的环氧丙烷皂化废水进行了主研究，结果表明，ＣＯＤｃｒ的去除率可达８０％，ＢＯＤ５的去除率可达９５％以上。     

总氮、总磷联合测定方法的改进

采用钼锑分光光度法测定总氮,考察了在提高温度的条件下,缩短消解时间对测定结果的影响。试验结果表明,调节氢氧化钠和过硫酸钾的用量,在同一溶液内测定总氮、总磷,并且将测定条件改为126～128℃,消解10min,其测定结果和与标准方法对照,精密度及准确度均令人满意。     

煤中有害元素的研究现状及其对环境保护的意义

本文给出了煤中有害微量元素的定义，即煤中含量小于１．０％的有毒元素，致癌元素，腐蚀性元素，放射性元素以及其它对环境有害的元素等。根据我国环保要求，提出当前应重视的有害元素，共２２种。作者还讨论了煤中有害微量元素对对环境的危害以及国内外对煤中微量元素的研究现状和存在的问题。     

浮选剂污染河段大型底栖无脊椎动物的群落特征及其对水质的评价

利用大型底栖动物的群落结构及其行为反应对有毒化合物——浮选剂污染河段水质进行评价,并提出了受浮选剂污染的污水生物系统评价标准.结果表明,主要污染物丁基磺药对涡虫(Dugesia gonocephala)的24h LC_51为78ppm.根据受污河段底栖动物群落的变化和涡虫在各断面河水中的行为反应,浮选剂污水生物系统可以划分成α-多污带,β-多污带,α-中污带,β-中污带和寡污带。并对所提出的浮选剂污水生物系统进行了讨论。     

Prenatal diagnosis in two cases of de novo complex balanced chromosomal rearrangements. Three-year follow-up in one case

We report two cases of apparently balanced complex de novo chromosomal rearrangements (BCCR) detected prenatally at 17 weeks and 10 weeks of gestation, respectively. Chromosomes were studied using GTG-banding and fluorescent in situ hybridization (FISH). In one case four chromosomes and in the other case three chromosomes were involved in the rearrangements. One of the pregnancies was terminated and no external or internal abnormalities were detected at autopsy. The other pregnancy continued to term. Level III ultrasound examination showed no abnormalities. The child is now 3 years old and has neither congenital anomalies nor evidence of delayed psychomotor development.     

Renatal diagnosis of mosaic tetrasomy 12p/trisomy 12p by fluorescent in situ hybridization in amniotic fluid cells: A case report of pallister–killian syndrome

A prenatally detected case of a rare mosaic tetrasomy 12p/trisomy 12p is reported, presenting as the well-known accessory isochromosome 12p and a supernumerary single 12p marker in 17/24 and 6/24 clones of cultured amniotic fluid cells, respectively. The chromosomal nature of both marker chromosomes was investigated in cultured amniotic fluid cells by fluorescent in situ hybridization with various probes: the 12-centromeric probes pa12H8 and D12Z3, a whole chromosome 12 paint, and the chromosome 12p-specific paint M28. DNA analysis revealed a maternal origin of the extra 12p material. After counselling, the parents requested termination of pregnancy. Inspection and autopsy of the fetus revealed many of the dysmorphisms and internal structural abnormalities of the Pallister–Killian syndrome.     

Opportunities and constraints for Product-oriented Environmental Management Systems (P-EMS)

Product-oriented Environmental Management Systems (P-EMS) are a logical extension of current, often primarily process- of facility-oriented Environmental Management Systems. The Dutch government promotes P-EMS as part of its product-oriented environmental policies. The idea of P-EMS is to enable producers to make environmentally responsible decisions on product development and product strategies, in collaboration with suppliers and customers. This paper summarises example P-EMS projects in The Netherlands for two segments of industry, namely retail and manufacturing industry. Moreover two other initiatives will be covered that deal with the development of tools to facilitate P-EMS in two other industry sectors (food processing and building). Success factors that emerge from these initial experiences are: focus on partners that have a strong incentive to act, application of screening Life Cycle Assessments (LCA) or user-shells for LCA, and focus on improvements that can be implemented on the short term.     

兰炼烷基化废酸处理工艺选择

对目前四种烷基化硫酸处理工艺进行了分析比较，认为兰炼应依托现有硫酸装置，采用裂解制硫酸工艺来处理烷基化废酸。