Prenatal diagnosis of cystinosis utilizing chorionic villus sampling

The prenatal diagnosis of cystinosis is currently based on the increased amount of free-cystine present in amniotic fluid cells. Amniocyte cultures must be grown for at least 2 weeks to obtain sufficient cells for such measurements. Thus, the diagnosis cannot be made until close to 20 weeks gestational age by this method. We report a case in which chorionic villi were used for direct cystine measurement resulting in the in utero diagnosis of cystinosis at 9 weeks gestational age. The diagnosis was confirmed by the study of cultured chorionic villus cells, and of the 10-week abortus.     

The importance of chorionic villus sampling after first trimester diagnosis of cystic hygroma

The prenatal diagnosis of The Turner Syndrome is described at a menstrual age of 12 weeks. Detection of cystic hygroma was followed by vaginal chorionic villous sampling (CVS) which revealed a 45,X karyotype. Early documentation of fetal karyotype in the presence of a cystic hygroma is essential for accurate diagnosis and genetic counselling.     

絮凝法处理纸浆漂白废水的研究

研究了无机絮凝剂ＰＡＣ，ＰＳＡ，ＰＥＳ，ＭｇＣｌ２，ＣａＯ及其与有机高分子絮凝剂ＣＧＡ复全使用对两种不同工艺漂白废水的混凝处理特性，结果表明，水质１ＣＯＤｃｒ，ＡＯＸ去除率分别为６３．２％，４５．３％，水质２ＣＯＤｃｒ，ＡＯＸ去除率达７３．１￥％，５３．４％。化钙与碳酸钠具有相同的降解ＡＯＸ能力，硫离子在中性ｐＨ条件下可显著提高ＡＯＸ的去除率。     

硫磺回收装置标定及分析

本文对Ⅱ套SRU的标定结果，进行了比较详细的技术分析，在此基础上，对装置及其运行状况作出了评价，并提出了一些建设。     

轴承生产废水处理工艺的选择与实践

采用絮凝气浮 过滤工艺处理轴承生产废水。工程实践表明,该工艺处理效果稳定、耐冲击负荷、工艺组合合理。预处理后的废水经气浮 过滤工艺处理后,COD、SS、油的去除率分别为80.62%～84.31%、81.00%～84.39%、89.37%～96.45%,出水完全能达到排放标准。     

烧结砖生产中氟的逸出及钙基废渣固氟特性研究

砖坯烧制过程中，氟逸出的初始温度约为600℃，大部分氟在约800℃至砖坯发生明显烧结的温度内逸出，以CaO含量高的粘土原料制砖，氟逸出量相对较少。在此基础上，提出在制砖原料中添加适量钙基废渣抑制氟的逸出，并进行了详细的实验室和工业性试验；结果表明，在适宜添加量下，存氟率由约25％增至70％以下，且不影响砖制品质量。     

十六位DAC转换器的研制

十六位DAC转换器是为MAT系列同位素质谱仪磁场控制关键部件DAC73K模块进行国产化而设计的,它能够与八位、或十六位微机相兼容,具有精度高、准确度好、温飘小等特点,它的研制成功不仅加速了MAT系列质谱仪国产化进程,而且在其它自动控制系统中得到广泛应用.     

城市工业小区噪声现状评价与防治对策研究

对上海工业街坊固定和流动噪声的主要变化和声源强度进行调查和测试，应用ＰＮＩ噪声指数和等级评价方法对该城市工业记噪声进行评价。用数学方法对典型小区和大部分工业街坊的职工和居民的职业病和健康进行分析，并提出减少噪声伤害的若干对策。