有机磷酸酯诱导迟发性神经毒性及其对神经毒性酯酶(NTE)活性影响的动态研究

以成年产卵来航母鸡为试验动物，研究了三甲基苯基磷酸酯诱导的迟发性神经毒性。试验发现，母鸡口服ＴＯＣＰ后经过大约８－１０ｄ的潜伏期开始出现中毒症状，其表现为以步态失调为主要特征的运动障碍呈进行性加重，至２１ｄ开始便发展为瘫痪。     

Dystrophin protein and rflp analyis for fetal diagnosis and carrier confirmation of duchenne muscular dystrophy

A pregnant woman with indeterminate Duchenne muscular dystrophy (DMD) carrier status, but with DMD diagnosed in her deceased brother (unavailable for study), presented for prenatal diagnosis, intending to continue the pregnancy only if proven unaffected with DMD with near absolute certainty. Creatine kinase (CK) assays to clarify carrier status were inconclusive. Male sex in the fetus was identified, but DNA restriction fragment length polymorphism (RFLP) analysis was not yet available to this centre to investigate the possible transmission of the DMD gene, and the pregnancy was terminated. Tissue histology and dystrophin protein analysis demonstrated the absence of DMD. In a situation with proven maternal carrier status, future fetal inheritance of the opposite maternal X chromosome would indicate the presence of DMD. However, maternal carrier status remained in doubt through a second pregnancy, even with RFLP studies, and was finally established when dystrophin analysis confirmed the presence of DMD in the second fetus. Histologic findings are presented, contrasting features in the two fetuses. The value of dystrophin analysis for establishing the diagnosis of fetal DMD, in this case proving maternal carrier status in a difficult situation, and for demonstrating DMD gene:RFLP haplotype relationships is illustrated.     

Service transformation—managing a shift from business travel to virtual meetings

It has been shown that the potential for environmental, and financial improvements through the increased substitution of in-person meetings by virtual communication is considerable. However, it has also been shown that this potential is not automatically realized by investing in the technology that can enable virtual meetings. This paper describes two case studies that explored the factors that influenced communication and meeting behavior. A number of drivers and barriers for virtual meetings are identified, and, in addition, measures are proposed to improve the utilization of virtual tools for business communication.     

JHC－1型COD自动检测仪在污水处理场的应用

选用ＪＨＣ一且型ＣＯＤ自动检测仪对生化进口的ＣＯＤ值连续在线监测，在一年多的运行中检验了仪器的检测精度和准确度，并根据仪器的现场运行情况对仪器进行了一些完善，使之能较好地运行在实际生产中．     

大连湾陆源污染物排海总量控制信息系统概念设计

根据陆源污染物总量控制原理和沿海地区地方政府的经济条件，以大连湾为例，采用地理信息系统（ＧＩＳ）技术，设计了排放入海湾的陆源污染物总量控制信息系统的概念模型，涉及系统建设的原则，数据类型，软件，硬件，用户界面和功能。为我国海湾污染物控制工作提供经济实用，先进的管理方法。     

Prenatal diagnosis of Opitz (BBB) syndrome in the second trimester by ultrasound detection of hypospadias and hypertelorism

Prenatal diagnosis in a kindred with the Opitz (BBB) syndrome is presented. The inheritance is consistent with either autosomal dominant inheritance with sex limited expression or X-linked inheritance. The abnormalities in the kindred consist of hypertelorism, hypospadias, ambiguous genitalia, urocolic fistula, imperforate anus, mental retardation, diaphragmatic hernia, and malrotation with volvulus. A male fetus at 19 weeks was found by ultrasound to have hypertelorism and hypospadias with a small phallus consistent with the syndrome. The diagnosis was confirmed by pathologic examination after pregnancy termination. This is the first report of prenatal diagnosis of Opitz syndrome by ultrasonographic demonstration of hypertelorism and hypospadias in the second trimester.     

主次波长新分光光度法测定天然水硝酸盐

在硫酸介质中,邻苯氨基苯甲酸与硝酸盐(NO_3~-)生成紫红色络合物.本文依据悬浮颗粒对光的吸收性质研究利用该灵敏反应测定 NO_3~—N 新光度法——(?)次双波长法,通过对样品分析,可提高分析灵敏度和精密度,回收良好,且操作简单快速,计算曲线稳定,适合于测定地下水,湖水等天然水体 NO_3~-—N.     

城市生活垃圾焚烧对大气的污染问题

本文对我国城市有机混合垃圾经模化后,在过剩空气系数α?2,温度在700～900℃条件下焚烧的气态排放物进行了定性和定量分析.实验结果表明:烟气呈碱性,主要污染物NH_2的排放浓度最高.HCl次之,NO_x<100ppm,SO_x<1ppm,H_2S<10ppm.     

海洋环境中氧同位素示踪物技术

本文简要地介绍了在环境海洋学中的氧同位素示踪物技术，它有望成为大洋环流研究中一种新的可靠方法。以热带西太平洋和东海黑潮区等为例，文章对运用氧同位素示踪物技术以及氧同位素与盐度的相羞生描述海流的输运过程、水平和垂直扩散过程以及水团特征和混合过程等问题加以阐述。     

Spontaneous abortion after transcervical chorionic villus sampling: A case report

A case of spontaneous abortion after transcervical CVS is presented. Despite no evidence of bacteria in the vagina and cervix prior to sampling and the prophylactic use of Metronidazole, pathological evidence of chorioamnionitis was found. The implications of this are discussed.