A fragment constant QSAR model for evaluating the EC50 values of organic chemicals to Daphnia magna.

The quantitative relationship between the median effective concentration (EC50) of organic chemicals to Daphnia magna and the number of molecular fragments was investigated based on experimental EC50 values for 217 chemicals derived from the literature. A fragment constant model was developed based on a multivariate linear regression between the number of fragments and the logarithmically transformed reciprocal values of EC50. Functional correction factors were introduced into the model. The model was verified using an independent set of randomly selected data. The mean residual of the final model was 0.4 log-units. The robustness of the model was discussed based on the results of three jackknife tests.     

哲学视野中的环境友好型社会探讨

环境友好型社会建设是中国"十一五"发展战略的重要内容之一,这一理念的提出是全面建设小康社会的现实需要.在深入分析其内涵的基础上,运用马克思主义哲学分析人类从敬畏白然、征服自然,再到环境友好的历史过程,并进一步提出如何推进历史性转变,从决策、法规、经济模式、区域格局、消费方式等方面全面建设环境友好型社会.     

欧盟环保禁令的弦外之音

贸易是拉动中国经济增长的重要力量。据商务部统计，2004年中国外贸依存度近80％，居全球首位。中国加入WTO之前，经常遭遇发达国家的贸易“歧视”。为此，我们不遗余力历经15年艰苦谈判，终于在2001年9月17日如愿。多少善良的国人坚信，关税贸易壁垒的“冬天”已去，自由贸易的“春天”已经来临。     

超深厌氧塘的技术特性

超深厌氧塘是一种稳定塘新工艺。与常规厌氧塘相比，具有ＢＯＤ５容积负荷大、占地面积小，受温度影响小的优点。探讨了它的工作机理，本研究确定了负荷、水深和去除率之间的定量关系以供实际应用。     

Concurrency: a system design approach to environmental management and sustainability

The lessons of history indicate that mismanagement of natural resources and the environment often leads to potentially adverse consequences.The increasing interest in economic development,particularly in the developing countries of the world coupled with increasing population pressures and the globalization of economic activity is placing noticeable stresses on the ultimate sustainability of both human and environmental systems.Sustainable development is not a new concept.It has been an area of concern for different elements of society for some time.Yet efforts to understand the implications of sustainable development have not,until recently,been formalized.We have focused singularly on economic development and environmental quality as if they were mutually exclusive.This paper focuses on the concept of concurrency as both a conceptual framework and practicable method of understanding and implementing the ecology and economy of sustainability.     

云南省利用水泥回转窑处置危险废物的前景

利用独特的设备和水泥窑的工艺特点,用废物代替水泥生产中的原材料,合理处置危险废物,使环境治理和循环经济达到有效的结合,是一项废物处理和资源化的新途径,是水泥生产企业可持续发展的方向之一,具有广阔的发展前景。     

高邮市基本农田环境质量监测与评价

根据近两年高邮市试点工作经验，介绍基本农田分等定级的环境监测与评价方法，认为积极开展农田环境监测并进行科学评价是基本农田保护的重要工作内容。     

对产生环境问题的根源探析

从多维、多学科的视角，就环境问题产生的原因进行了比较系统，全面的研究和探讨。具体包括环境问题产生的哲学根源、宗教根源、伦理根源、技术根源和经济根源。从表面上看，环境问题是一个技术问题、经济问题；但从深层次考察，环境问题则也是哲学问题、宗教问题和伦理问题。环境问题的根本解决，不仅有赖于技术进步和经济法律制度的变革，更有赖于人类文明的转型和伦理观念的觉悟。     

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.