烟气脱硫(FGD)工程设计框架

在国家实施“总量控制”和“两控区”的重要环境保护政策下,烟气脱硫（ＦＧＤ）工程提到了可持续发展的议事日程,实施ＦＧＤ工程是投资大、直接经济效益不显著的环境工程。因此在全面论述实施ＦＧＤ工程的设计框架,即各设计阶段应考虑的几个重大因素和必须遵循的一系列规则基础上,着重对目前国内外主要的ＦＧＤ工艺进行了技术经济分析评述,提出选择ＦＧＤ工艺的８条重要原则。供重大决策参考和推动环境目标的实现。     

中德中小学环境教育比较

从环境教育的概念出发，较系统地阐述了中德在中小学环境教育方面的异同，进而从认识，观念、科技，管理等角度提出了我国在实施中小学环境教育时可借鉴的一些看法。     

江苏省丹阳市水稻土自然生产潜力的初步研究

本文借助作物生长模型与模糊数学的方法对江苏省丹阳市的两种种植制度的土壤自然生产潜力进行了初步的分析研究。结果表明,模拟的小麦/玉米-晚稻种植制度的气候生产潜力比小麦-单季稻高3000kg/ha 左右。指出丹阳的小麦生产应以挖掘、提高土壤自然生产潜力为主,而单季稻的生产则应以提高品种的气候生产潜力为方向。     

Rapid detection of numerical aberrations of chromosomes 13, 18 and 21 in chorionic mesenchymal cells

We have devised and evaluated a rapid screening method for the detection of numerical aberrations of chromosomes13, 18 and 21 in chorionic villus cells. We used non-radioactive in situ hybridization (ISH) with three chromosome-specific probes on overnight-attached mesenchymal cells from chorionic villi. A blind study was performed of 47 karyotypically normal samples, one triploid sample, two samples trisomic for chromosome 21, and two samples from a fetus with putative mosaicism (46/47, +21). All samples were hybridized with the chromosome 18- and 21-specific probes. Thirty samples were additionally hybridized with the chromosome 13-specific probe. The test could be completed within 3-4 days of sampling. In samples disomic with respect to the probed chromosomes, an average of 2 per cent (range 0-9 per cent) had three hybridization signals. By contrast, in the samples trisomic for the probed chromosome(s), 57 per cent (chromosome 13), 51 per cent (chromosome 18), and an average of 74 per cent (55-86 per cent) (chromosome 21) of the nuclei exhibited three signals. In the putative mosaic samples, the number of nuclei with three chromosome 21-specific signals ranged from 41 to 69 per cent. We conclude that this technique rapidly and clearly distinguishes between normal and trisomic/triploid samples, and consequently may be of use in future prenatal diagnosis.     

The nature of the redshift and directly observed quasar statistics

The nature of the cosmic redshift is one of the most fundamental questions in modern science. Hubble's discovery of the apparent Expansion of the Universe is derived from observations on a small number of galaxies at very low redshifts. Today, quasar redshifts have a range more than 1000 times greater than those in Hubble's sample, and represent more than 100 times as many objects. A recent comprehensive compilation of published measurements provides the basis for a study indicating that quasar observations are not in good agreement with the original predictions of the Expanding Universe theory, but are well fit by the predictions of an alternative theory having fewer adjustable parameters.     

四川盆地土壤微量元素生态类型研究

本研究从生态学观点出发,根据土壤缺乏微量元素的临界值指标,探究了四川盆地土壤微量元素的生态类型,按其土壤供给有效态微量元素的丰缺程度,将本区土壤微量元素分为五种生态类型:严重缺乏、缺乏、适中、丰富和很丰富。统计结果表明,四川盆地各类土壤的微量元素生态类型特点为:有效硼含量很低,普遍严重缺硼;有效锌含量亦低,近半数土壤缺锌;多数土壤有效锰含量丰富,仅少部分土壤供锰不足;有效铜和铁的含量丰富。