红水河流域资源开发研究

红水河流域是中国西南地区建设中的水电基地和有色金属工业基地。本报告在分析流域经济贫困落后、自然环境脆弱等不利因素对流域资源开发和经济增长的影响的基础上,提出了建设有色金属工业综合体、改进农业生产、调整流域城市体系以及改善生态环境等方面的措施。     

中国的改革开放政策与环境保护发展

从产业结构、能源结构、基本设施、西部大开发、新工业文明等5个方面分析了中国经济体制的改革和经济增长方式的转变,并从法制建设、行政管理、公众 意识、经济手段、科技进步等5个角度讨论了中国环境保护政策的演化。展望 了中国的环境保护在综合决策、控制人口、强化法制、增加投入、清洁生产等5种措施上的发展效果。     

Cardiac flow after fetal blood sampling in normally grown and growth-retarded fetuses

The objective of this study was to evaluate the effect of fetal blood sampling on cardiac flow velocity waveforms. Flow velocity waveforms were measured from the ascending aorta and pulmonary artery immediately before and after fetal blood sampling in 29 normally grown and 12 growth-retarded fetuses. The latter group was characterized by abnormal Doppler indices in the umbilical artery and middle cerebral artery suggestive of uteroplacental insufficiency as the causative factor of the impaired growth. The flow velocity parameters studied were the peak velocity, the time to peak velocity, and the left and right cardiac output and their ratio. In normally grown fetuses, the peak velocity and right and left cardiac output values increased significantly after fetal blood sampling, while no significant changes were observed in the other indices considered. The gestational age at the time of the procedure was positively related to the amplitude of these changes. In growth-retarded fetuses, fetal blood sampling did not induce any significant increase in cardiac output or peak velocities, while in more than 50 per cent of the fetuses these Doppler indices decreased. The amplitude of the decrease was significantly related to the severity of acidosis in the umbilical vein. In conclusion, the cardiac haemodynamic response to fetal blood sampling differs between normally grown and growth-retarded fetuses. This difference may explain the higher rate of complications occurring in the latter group of fetuses after blood sampling.     

皖南前南华纪岩石地层

在地层构造区划分的基础上，系统论述了前南华纪岩石地层层序、宏观特征、沉积环境、原始构造环境。综合垂向序列的时间特征、原始构造环境、构造界面、将前南华系划分为两个构造层。第一构造层为蓟县纪－青白口纪早期弧后边缘盆地沉积。第二构造层为青白口纪晚期大陆裂谷火山－沉积岩。并以此为框架，对相邻地区的地进行了对比。     

Allelopathic effects of extracts from Solidago canadensis L.against seed germination and seedling growth of some plants

To investigate the potential role of allelopathy in plant interference and in the successful invasion of alien species Solidago canadensis, aqueous and ethanolic extracts from rhizomes, stems and leaves of S. canadensis were prepared and used as treatment solutions to assess their effects on seed germination and seedling growth in four target species, mulberry （Morus alba）; morning glory （Pharbitis nil）, wheat （Triticum aestivum） and rape （Brassiea campestris）. Reduction and/or growth in germination and growth of the target plant species in the presence of both aqueous and ethanolic extracts at different concentrations indicated that the responses were species-specific and concentration-dependent. Generally, ethanolic extracts （especially from leaves） imposed stronger effects on both seed germination and seedling growth. Extracts with lower concentration at 0.001 g/ml dw could stimulate the seedling growth of rape and morning glory, whereas extracts at any given concentrations have inhibitory effects on wheat and mulberry. It is suggested that the aqueous and ethanolic extracts of all the three parts of S. canadensis have significant allelopathic effects. Although both inhibition and stimulation occurred in the germination and growth of the target species, extracts with higher concentrations definitely inhibit seed germination and seedling growth of all target plants. We suggest that allelopathy plays a more important role than other mechanisms do in the out-competition ofS. canadensis over other plants, and make it invasive in new habitats.     

大亚湾冬春季微型浮游动物摄食研究

2004年12月和2005年3月份分别在大亚湾5个典型站位采样,用现场稀释法研究了冬春季大亚湾微型浮游动物对浮游植物的摄食率(g)和浮游植物的生长率(μ)。结果显示:12和3月份大亚湾浮游植物的生长率分别为0．18-1．19 d-1,0．16-1．14 d-1,微型浮游动物的摄食率分别为1．00-2．08 d-1,0．33-1,74 d-1,微型浮游动物对浮游植物现存量的摄食压力范围为76％-287％,47％-258％,对潜在初级生产力的摄食压力范围分别为101％-445％,70％-330％。说明大亚湾作为典型的亚热带海湾,具有高的μ、g值,微型浮游动物对浮游植物的摄食压力也处于较高水平。     

Effects of lead，cadmium，mercury chlorides and aquatic environmental samples on the growth of Escherichia coli

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赣东北地区浅变质岩岩石地层单位划分及沉积构造背景分析

赣东北地区浅变质岩地层非常发育，构造十分复杂，“九五”期间在此区开展1：5万区域地质调查发现：大致以景德镇-鹅湖断裂以南，塔前-赋春断裂以北，浅变质岩以一套碎屑岩为主夹菱铁矿、碳酸盐和火山碎屑沉积；塔前-赋春断裂以南，香屯-太白寺断裂以北变质岩主要以火山碎屑岩为主夹中基性熔岩、碎屑岩沉积。根据沉积构造环境分析，前者为正常海相沉积，后者为裂谷环境沉积，分别代表两个不同时期，不同构造环境沉积的产物。     

Confined placental mosaicism in CVS and pregnancy outcome

The perinatal outcome of 26 patients with confined placental mosaicism (CPM) detected in chorionic villus sampling (CVS) who wished to continue their pregnancies was compared with that of two controls per patient matched for age and parity (n=52). There were no significant differences in birth weight or gestational age at delivery between patients with CPM and controls. There were no cases of intrauterine growth retardation (IUGR) in the CPM patients as compared with two (2/52, 3·8 per cent) in the control group (P>0·05). There was no significant increase in fetal loss between the study group (1/26, 3·6 per cent) and the controls (1/52, 1·9 per cent) (P>0·05).     

辽东湾海冰生消的热力要素分析

利用辽海湾ＪＺ２０－２海域冰斯气象、水文和海泳的测量资料，对冰面太阳辐射、长波辐射、盛热、潜热、冰内热传导和泳下海洋热通量等热力要素的计算方法进行了讨论，并对其中的部分参数进行了确定；对１９９７～１９９８年度不同天气条件和不同泳期的海８泳热力要素进行了对比分析，发展太阳辐射的主要影响因素为云层，冰面感热主要受控于风速和和气温，而长波辐射变化量不大，不同风向时的相对湿度差别很大，疳直接影响到冰面潜热