Prenatal tests for Sanfilippo disease type B in four pregnancies

We report the prenatal diagnosis of two fetuses with Sanfilippo disease type B. In both pregnancies there were excessive amounts of heparan sulphate in amniotic fluid and the activity of N-acetyl-α-D-glucosaminidase was undetectable in cultured amniotic fluid cells. The predictions were confirmed by enzyme assay of cultured skin fibroblasts from the aborted fetus or the affected infant. The disorder was excluded for two other pregnancies at risk and the predictions are considered to be correct because of the normal progress of the healthy children.     

5B—1型COD快速测定仪测试污水中COD

本文通过对废水中ＣＯＤ的两种分析方法的对比实验， 结果表明： 用仪器法测废水中的ＣＯＤ， 方法简便， 节约能耗， 数据准确， 比用普通的化学法更为实用， 适合于大批量的废水检测。     

工业废气年排放量的灰色GM（1,1）预测

本文根据灰色理论ＧＭ（１，１）预测方法，以保山地区１９９３－１９９７年度工业废气年排放量数据为基础，建立了保山地区工业废气年排放量的ＧＭ（１，１）预测模型。模型精度为一级，用该模型进行预测，能反映出保山地区工业废气年排放量的发展变化情况。     

城市污水处理厂动态模拟研究

利用活性污泥1号模型。对采用A/O工艺的上海某城市污水处理厂的碳化、硝化、反硝化过程进行计算机动态模拟，结果表明，出水中的TCOD、TN与污水处理厂的出水基本吻合，说明利用活性污泥1号模型对城市污水处理厂进行模拟是可行的。并根据模拟结果建议该厂运行过程中应降低A段的溶解氧。     

Prenatal diagnosis of carbamoyl-phosphate synthetase deficiency by fetal liver biopsy

In a pregnancy at risk for carbamoyl-phosphate synthetase (CPS) deficiency, prenatal diagnosis was attempted by fetal liver biopsy, performed at 18 weeks of gestation. CPS activity was absent and the diagnosis was confirmed after termination of the pregnancy. The technique employed for fetal liver biopsy is described together with an evaluation of its possible role in prenatal diagnosis.     

微波诱导氧化处理雅格素红BF-3B150%染料废水的研究

以颗粒活性炭为催化剂 ,建立了微波诱导氧化工艺 ,对雅格素红BF 3B15 0 %染料废水进行了有效处理 .分别考查了废水初始浓度、微波功率、微波辐照时间、活性炭粒径、活性炭用量和废水pH值对废水处理效果的影响 .该工艺对稀释 10 0倍后的实际废水 (原水COD为 2 82 4 0mg·L-1)最佳处理工艺条件为 :微波辐照时间 6min、微波辐射功率 6 5 0W、活性炭用量为 8g、活性炭粒径 2 0目以下 ,微波诱导催化氧化在酸性条件下比在碱性条件下的处理效果要好 .在此工艺条件下 ,废水脱色率达99 6 %、COD去除率达 96 8% .微波辐射雅格素红染料废水脱色表观反应动力学研究表明 ,该反应近似一级反应 ,动力学常数为 0 735 1min-1,半衰期为 0 94min .微波诱导氧化、活性炭吸附和单纯微波辐射 3种不同工艺的对比实验表明 ,微波诱导氧化工艺具有明显的优越性 ,且不会对环境造成二次污染     

N-苯基-2-萘胺和N-苯基-1-萘胺籍分离的大鼠肝细胞的代谢

具有致癌性的抗氧化剂N—苯基—2-萘胺(P2NA)和N—苯基—1-萘胺(PINA)在体外籍新鲜分离的大鼠肝细胞进行生物转化.肝细胞培育后的产物经TLC和HPLC分析表明,二者主要代谢产物为酚类.P2NA生成二个酚类化合物,经与标准样品作平行层析证实为6-羟基P2NA和4＇-羟基—P2NA,而P1NA仅生成一个酚类化合物.P2NA经去苯基反应的代谢产物2-萘胺未被检出.     

Study of control strategy and simulation in anoxic-oxic nitrogen removal process

The control strategy and simulation of external carbon addition were specially studied in an anoxic-oxic(A/O) process with low carbon: nitrogen(C/N) domestic wastewater. The control strategy aimed to adjust the flow rate of external carbon dosage to the anoxic zone, thus the concentration of nitrate plus nitrite(NOx^- -N) in the anoxic zone was kept closed to the set point. The relationship was studied between the NOx^- -N concentration in the anoxic zone(SNo) and the dosage of external carbon, and the results showed that the removal efficiency of the total nitrogen(TN) could not be largely improved by double dosage of carbon source when SNO reached about 2 mg/L. Through keeping SNO at the level of about 2 mg/L, the demand of effluent quality could be met and the carbon dosage could be optimized. Based on the Activated Sludge Model No. 1 (ASM No. 1), a simplified mathematical model of external carbon dosage was developed, Simulation results showed that PI controller and feed-forward PI controller both had good dynamic response and steady precision. And feed-forward PI controller had better control effects due to its consideration of influent disturbances.     

基于B/S结构的环境信息系统研究

介绍了B/S结构的环境信息系统的优点及其环境信息系统的基本框架，并对所包含的组件及功能作了详细的分析，认为B/S结构的环境信息系统使用方便、易扩展、可移植性好。     

两种假单孢菌中二氯酚降解酶活性及其定域研究

对两种有降解二氯酚能力的假单孢菌Ｐｓｅｕｄｏｍｏｎａｓ ｓｐ．ＤＣＰ－１和Ｐｓｅｕｄｏｍｏｎａｓ ｓｐ．ＤＣＰ－２中二氯酚降解酶活性及定域进行了测定，结果表明该酶的活力与菌种、培养等因素有关，与诱导物的关系不显；酶主要定域在膜周及膜内；酶的活力在两种菌中的水平相当；酶的比活力在ＤＣＰ－１的膜周处表现出相当高的水平。