大直径薄壁钢筒变薄旋压成形工艺研究

论述大径比高精钢筒变薄旋压成形试验过程 ,通过确定合理工艺过程 ,选择最佳工艺参数 ,从而旋出了合格筒体。结果表明 ,D40 6A钢退火状态变薄旋压性能良好 ,旋压塑性变形稳定 ;有效控制扩径量和壁厚差是变薄旋压成形和获取高精钢筒的关键     

四种南京地产栽培野菜蛋白质营养价值的评价研究

4种传统野菜已在南京地区规模栽培利用。采用模糊识别法和氨基酸比值系数法,分别以鸡蛋蛋白质为标准蛋白 ,以WHO/FAO氨基酸参考模式为评价标准 ,对这4种野菜蛋白质营养价值进行了评价 ,并与6种常见蔬菜蛋白进行对照比较。结果表明 ,4种野菜蛋白质含量为2.3 %～5.0 % ,蛋白质中氨基酸种类齐全 ,其含量为77.73 %～89.36 % ,必需氨基酸占总氨基酸量的36.72 %～42.04 % ,第一限制性氨基酸为含硫氨基酸 (Met +Cys)。其蛋白质营养价值分别优于同科的一些常见蔬菜。     

NitroGenius:氮决策支持系统--荷兰氮污染问题最佳解决方案的一个游戏模拟实验

利用计算机模拟的方法,我们为第二届国际氮会议研制开发了一个游戏形式的氮决策支持系统.研制这一系统的目的是:①使科学工作者和决策者们都能认识到荷兰氮污染问题的复杂性,因为荷兰是一个农业、工业和运输业活动密集的区域;②探索以最低的社会经济代价解决氮污染的最佳方案.NitroGenius由有关时空范围内的氮流动模型组成,其中包括氨和氮氧化合物的释放及其对地表水和地下水的污染.NitroGenius中还包括了一个经济模型,它描述了各个重要经济部门之间的关系,以及不同氮排放控制措施对国民生产总值(GDP)、失业率、能源消耗和环境的影响.在第二次国际氮会议期间,大约有50个研究组对NitroGenius进行了测试,结果表明,如果认真进行计划并选择适当的治理措施,就能够以适当的代价解决荷兰的氮污染问题.     

Prenatal diagnosis of trisomy 9 mosaicism: Two new cases

We present two prenatal cases of trisomy 9 mosaicism, both of which presented intrauterine growth retardation (IUGR) and other abnormal ultrasound findings. In case A, mosaicism was found in amniotic fluid cell cultures, of which 65 per cent were trisomic cells, on average. In case B, trisomic cells were present in amniotic fluid cell cultures (12 per cent) but none were found in fetal cord blood. After autopsy, cytogenetic findings were confirmed in different tissue cultures. It is concluded that echographic indicators are a very useful tool for a correct prenatal diagnostic interpretation of trisomy 9. Suspected trisomy 9 mosaicism always requires further investigation and fetal cord blood cytogenetic analysis may not be considered as providing an accurate diagnosis of fetal trisomy 9.     

模糊神经网络方法在船舶油污事故损害赔偿评估中的应用研究

针对船舶油污事故损害赔偿评估非线性系统的复杂性，分析了人工神经网络技术在该领域应用的可能性，并以20个国际油污基金公约所承认著名赔偿案例为例建立船舶油污事故的神经网络评估模型，该模型对中国船舶油污事故损害赔偿评估具有一定的参考实用价值，为中国船舶油污事故损害赔偿评估提供了一种新颖而方便的计算方法。     

加强内蒙古自治区环境监测体系标准化建设,进一步提高服务效能

加大标准化建设步伐,促进自治区环境监测工作上台阶、上水平。     

Improvement of prenatal diagnosis of wilson disease using microsatellite markers

This paper describes a case of prenatal diagnosis for Wilson disease (WD) carried out in an at-risk couple of Sardinian descent, following non-directive genetic counselling. Diagnosis was obtained by using eight microsatellites located within or flanking the WD locus, six of which were 100 per cent and two 50 per cent informative. The use of several markers may limit the occurrence of misdiagnosis resulting from recombination or instability of repeats.     

Familial congenital diaphragmatic hernia: Prenatal diagnosis,management, and outcome

Congenital diaphragmatic hernia (CDH) is a developmental defect of as yet unknown aetiology which accounts for 8 per cent of all major congenital anomalies and is associated with up to 80 per cent mortality despite optimal postnatal treatment. The risk of recurrence of CDH for future sibs after one affected infant is about 2 per cent. A multifactorial/threshold inheritance pattern with an observed high male:female sex ratio is currently favoured for the rare occurrence of familial CDH, although other modes of inheritance have also been described. We report three cases of familial CDH, two of whom were brother and sister sibs and the third was a first cousin, born within 18 months of each other. The diagnosis was by ultrasound and there were several factors predicting a poor outcome. The mortality in this group was 100 per cent. The prenatal diagnosis, treatment options, the unusual genetic aspects, outcome, and the pathology involved are discussed.