微电解-水解酸化/接触氧化工艺处理染化废水的研究

采用微电 解 Ｈ／ Ｏ 工艺对染 料化 工 废水 进行 了 处理 研究 ，结 果表 明 以微 电解 和 水解 酸 化作预处理 ，可使废 水的 Ｂ Ｏ Ｄ５／ Ｃ Ｏ Ｄ Ｃｒ 的比由 ０２５ 提高 到０５ ０ 左 右，平 均 增加 ５０ ％ 。通 过加 酸， 可提高微电 解的去除 效果，在 进水 Ｃ Ｏ Ｄ Ｃｒ 为４ １００ ～４ ３００ ｍ ｇ／ Ｌ，色度 为３ ４００ ～３ ６００（ 倍） 范围内 ，系统对 Ｃ Ｏ Ｄ Ｃｒ 和色度 的去除效 果分别 可达到９７ ５ ％ 和９８３ ％     

后扣板冷挤压工艺及模具

此文分析了产品成形的特点,模具承载的负荷特点,从而在成形工艺上、润滑上、模具结构及选材上采取了相应的措施.用H-4水基高分子润滑剂和3Cr2W8V制作冷挤压模都取得了明显效果.     

恐龙骨骼化石与其它脊椎动物骨骼的微量元素的对比研究

采用中子活化分析 (INAA)技术 ,对比分析恐龙骨骼化石及其它脊椎动物 (乌龟、鱼和大量哺乳动物 )骨骼中微量元素的含量组合 ,结果表明稀土、砷、钡、铀元素在恐龙骨骼化石中的含量远高于其它脊椎动物骨骼 ,而锌元素的含量情况却与之相反 ;同时进一步分析推测得出 :这种砷、钡元素含量的高异常和锌元素的低异常 ,极可能是导致四川盆地恐龙动物群集群死亡的原因之一。     

论环境外交的发展趋势和特点

简要阐述了环境外交兴起的原因及其３个阶段的发展过程，在此基础上较详细介绍环境外交的概念和含义，并较深入地概括了环境交区别于其它外活动的６个特点，作者认为，研究并掌握上述基本问题，对于建立环境外交学的科学体系，促进环境外交的发展，发展环境保护事业，具有非常重要的作用意义。     

塑料和橡胶类废物的热物理与焚烧特性研究的进展

随着社会和科技的发展，塑料和橡胶废弃量与日俱增，已成为城市垃圾的重要组成，由于这类废弃的聚合物给环境带来了污染问题，怎样合理地处理和利用已经成为一项重要的研究课题，本文对塑料和橡胶类的废物的理化性质，热值，焚烧特性，污染特性进行了论述，并根据它们的热物理及焚烧特性提出了进一步优化废物焚烧炉，完善低污染，低腐蚀，低粘结的废弃物的焚烧工艺的一些设想。     

A Simulation of Temporal and Spatial Variations in Carbon at Landscape Level: A Case Study for Lake Abitibi Model Forest in Ontario,Canada

Using a case study of the Lake Abitibi Model Forest (LAMF), this study aims to assess the temporal and spatial variability in carbon storage during 1990–2000, and to present a comprehensive estimation of the carbon budget for LAMF's ecosystems. As well, it provided the information needed by local forest managers to develop ecological and carbon-based indicators and monitor the sustainability of forest ecosystems. Temporal and spatial carbon dynamics were simulated at the landscape level using ecosystem model TRIPLEX1.0 and Geographical Information System (GIS). The simulated net primary productivity (NPP) and carbon storage in forest biomass and soil were compared with field data and results from other studies for Canada's boreal forests. The results show that simulated NPP ranged from 3.26 to 3.34 tC ha⁻¹ yr⁻¹ in the 1990s and was consistent with the range measured during the Boreal Ecosystem-Atmosphere Studies (BOREAS) in central Canada. Modeled NPP was also compared with the estimation from remote sensing data. The density of total above-and belowground biomass was 125.3, 111.8, and 106.5 tC ha⁻¹ for black spruce, trembling aspen, and jack pine in the LAMF ecosystem, respectively. The total carbon density of forested land was estimated at 154.4 tC ha⁻¹ with the proportion of 4:6 for total biomass and soil. The analysis of net carbon balance of ecosystem suggested that the LAMF forest ecosystem was acting as a carbon sink with an allowable harvest in the 1990s.     

粉煤灰/工业污泥烧结陶粒的制备与应用

以粉煤灰和工业污水处理站的剩余污泥为主要原材料，采用烧结法研制复合陶粒。分析了不同配方和不同烧结温度对陶粒性能的影响，以陶粒吸水率．容重为评价指标确定最佳配比和最佳烧结温度。提出用陶粒铺设景观水底，治理城市水体．并对其进行了可行性分析。粉煤灰／污泥陶粒的容重为0．79～0．9g／cm^3，吸水率为68．95％-80．01％。陶粒对水中氨氮和总磷吸附容量分别为0．03～0．05mg／g和0．01-0.02mg／g。     

Cells of the connective tissue differentiate and migrate into pollen sacs

In angiosperms, archesporial cells in the anther primordium undergo meiosis to form haploid pollen, the sole occupants of anther sacs. Anther sacs are held together by a matrix of parenchyma cells, the connective tissue. Cells of the connective tissue are not known to differentiate. We report the differentiation of parenchyma cells in the connective tissue of two Gordonia species into pollen-like structures (described as pseudopollen), which migrate into the anther sacs before dehiscence. Pollen and pseudopollen were distinguishable by morphology and staining. Pollen were tricolpate to spherical while pseudopollen were less rigid and transparent with a ribbed surface. Both types were different in size, shape, staining and surface architecture. The ratio of the number of pseudopollen to pollen was 1:3. During ontogeny in the connective tissue, neither cell division nor tetrad formation was observed and hence pseudopollen were presumed to be diploid. Only normal pollen germinated on a germination medium. Fixed preparations in time seemed to indicate that pseudopollen migrate from the connective tissue into the anther sac.