非程序DNA合成试验检测长江水质的遗传毒性

应用原代肝细胞的非程序DNA合成（UDS）试验检测水质的遗传毒性。结果表明,试验条件是可行的。UDS试验从DNA修复合成的角度来反映受试物的遗传毒性作用,可作为水质的评价方法之一。应用UDS试验对长江中下游五个城市的源水及自来水进行检测,结果发现,无论是源水还是自来水均可引起cpm值的升高,说明对哺乳动物细胞均具有一定的遗传毒性。     

曝气器工业化性能测试研究

对7种曝气器产品分别进行了单盘耐用性生产试验、单盘清水充氧性能试验以及对在大生产试验期间的服务面积、供气量、阻力变化、停气后阻力变化、曝气强度等方面进行了测试对比工作。试验表明,中微孔曝气器的各种性能指标明显优于大孔曝气器,可显著提高混合液中氧的吸收率。     

武汉市马鞍山森林公园夏季鸟类资源及其评价

2005年4—10月调查了武汉市马鞍山森林公园的夏季鸟类资源,共记录鸟类55种,隶属11目24科,其中夏候鸟15种,占27.27%;留鸟40种,占72.73%。有国家Ⅱ级保护鸟类5种,国家保护的有益或有重要经济、科研价值的鸟类43种,湖北省重点保护鸟类23种。对公园夏季鸟类资源进行了评价,并提出了管理建议。     

On the morphology of summer algae dynamics in non-stratified lakes

In the need for a model able to explain both slow and rapid changes in the behavior of algae, this paper applies a special technique to the construction of a more realistic dynamical system. The result is a transformation of a Monod type growth rate into an integrated Rabinowitch nonlinear functional form. A cusp catastrophe is subsequently unfolded from the state representation equation. Several qualitative aspects of the eutrophication phenomena then arise from the geometry of the model in a natural way. Also elucidated are the possible size of a collapsed algae biomass and the estimation of summerkill risks.     

新生二氧化锰吸附法去除水中直接大红染料

研究了影响新生MnO2对直接大红4B染料废水脱附脱色的有关因素，结果表明，pH是影响脱色效果的关键因素，吸附脱色存在佳化pH范围，其上限随染料浓度的提高和MnO2投加量的增加而增大。投加0．3g/L的MnO2可使染料废水的脱色率达到98．2％，升高温度可提高脱色率。     

山西中部地区地震灾害损失预测

简要分析了山西中部的历史地震灾害,用地震安全性评定的综合概率法计算了每个单元遭遇烈度的概率,并对建筑物类型进行分类,根据各类建筑物的易损性矩阵和不同类型单元的人涡震亡率、震伤率矩阵,计算出各个单元建筑物的期望经济损失和人员伤亡期望绝对值,并对计算结果进行了分析和比较。     

Fluoride and aluminium concentrations of tea plants and tea products from Sichuan Province,PR China

Some Tibetans in Sichuan Province in southwestern China have been suffering from fluorosis, due to drinking and eating tea with high fluoride (F) and aluminium (Al) contents. Tea plants, soils of tea plantations and tea products from Yaan, Gaoxian and Yibin Cities in Sichuan Province were investigated to evaluate the factors affecting F and Al contents in tea products. The F and Al concentrations of four commercial brands of brick teas were significantly higher than those of 11 brands of green teas. Chemical analysis indicated that total and available F and Al concentrations in tea plantation soils in Yaan and Gaoxian were within the normal range compared with acid soils in South China and tea soils in Fujian Province. Edaphic conditions did not contribute to the high F and Al concentrations in brick tea. Analysis of raw materials of brick tea indicated that old leaves were the major contributors to the high F and Al contents contained in brick tea. There were also great variations among different tea varieties in accumulating F and Al, and concentrations of F and Al in tea variety of Qianmei 303 were about 2-3-fold higher than the other three varieties. Selection of appropriate varieties would be important to lower F and Al contents in tea products.     

The effect of aniline on photochemical reactions in atmospheric and synthetic air samples

The inhibitory effect of aniline in photochemical smog reactions was studied using actual Toronto air samples. An aniline concentration of 0.81 pphm had negligible effect in a light traffic air sample containing negligible NO, whereas 20 pphm in a heavy traffic sample caused a 70% decrease in the oxidant dosage, a 50% decrease in the NO₂ peak and a four-fold increase in the NO half-life. In experiments with propylene in synthetic mixtures, the half-life of propylene was increased from 144 min. to 192 min. by the present of 20 pphm of aniline. In addition, a thirty-fold increase in condensation nuclei was produced following a one hour induction period. A chemical mechanism is proposed which is consistent with these results. Although the condensation nuclei detected may be too small to produce light scattering, they may be retained in the lung. In addition they may grow in size. These consequences do not favour the use of aniline as an inhibitor in photochemical smog.