石材废水集约化处理工程实例

介绍了一个石材废水集约化处理的成功实例，分析、总结了混凝沉淀法处理石材废水的可行性及注意事项，并通过比较得出石材废水集约化处理较分散治理具备明显优势的结论。     

The effect of metapleural gland secretion on the growth of a mutualistic bacterium on the cuticle of leaf-cutting ants

In Acromyrmex octospinosus leaf-cutting ants the metapleural glands produce an array of antibiotic compounds that serve as a general defence against unwanted microbes on the cuticle. Leaf-cutting ants also grow mutualistic Pseudonocardiaceae bacteria on their cuticle that produce antibiotics controlling a microfungal parasite of their fungus gardens. Interaction between this bacterium and gland secretion therefore seems unavoidable. We document the typical development of bacterial growth on the cuticle of young major workers, show that growth starts a few days after eclosion, and that the maximal cover is reached after 2–3 weeks and gradually declines when workers mature. Experimental closure of the metapleural glands had no effect on the initial exponential growth phase of the bacterium, but significantly reduced the cover during the decline phase. The age-dependent abundance of the bacterium and its partial dependence on metapleural gland secretion support the hypothesis that the abundance of this mutualist is actively regulated.     

佳木斯台形变观测对东北地区几次浅震“场兆”异常的探讨

大地震在主破裂前往往行成地壳变形,高应力作用下进入峰值后的变形阶段,反映到地倾斜观测日均值曲线上,表现为固体潮形变趋势异常,这些异常能否指示远距离的地震,近年来不少研究者发现,远场前兆往往出现在对应力、应变变化反应灵敏的特殊构造部位。佳木斯台可能处于这种特殊的构造部位,对东北地区浅源地震短期前兆异常“场兆”的趋势性变化具有一定的意义。     

酸碱度变化对日本三角涡虫生存及再生的影响

用自来水和去离子水配制不同的pH溶液，测定涡虫生存及再生的情况，以及涡虫可承受的pH变化幅度，确定日本三角涡虫对不同酸碱环境的耐受性。结果表明涡虫对酸碱环境的耐受力较强。     

钢结构件生产加工项目环境影响评价技术浅议

介绍了钢结构件生产加工项目环境影响评价中工程分析、污染防治措施以及清洁生产等方面的环境影响评价要点，以期为同类项目的环境影响评价、污染治理和环境管理提供参考。     

反渗透工艺处理回用循环水排污水技术工业应用

采用反渗透工艺处理火电厂循环冷却水排污水，作为循环水补充水和锅炉补给水，具有显著的经济效益和环境效益。     

我国沙尘暴的发展情况及防治对策

沙尘暴天气是指强风把地面大量沙尘卷入空中，使空气相当浑浊，使水平能见度小于1千米的灾害性天气。沙尘天气是干旱、半干旱地区特有的一种天气。     

异型材挤压模具开裂失效原因分析

分析了异型材热挤压时造成挤压模具开裂失效的各种原因,并提出了预防和补救措施。