区域历史地理研究与国土规划

人口与资源和环境之间的相互关系是一个历史过程。从发生学观点研究特写区域这种关系及其变化规律是区域历史地理研究的核心内容，探索历史上人口与资源和环境之间相互关系的规律及其演化机制，可为区域国土规划与整治中人口、资源与环境发展提供必要的历史借鉴和客观依据。同时，国土规划与整治的现实任务亦为区域历史地理研究提供了发展机遇。     

Environmental regulations and enterprises innovation performance: the role of R&D investments and political connections

Environment, Development and Sustainability - The purpose of this paper is to investigate the nonlinear relationship between environmental regulations and enterprise innovation performance, as well...     

Studies of 3D-quantitative structure-activity relationships on a set of nitroaromatic compounds: CoMFA,advanced CoMFA and CoMSIA

By using comparative molecular field analysis (CoMFA), advanced CoMFA and comparative molecular similarity index analysis (CoMSIA) methods, the 3D relationships between the structures of 35 nitroaromatic compounds and their toxicities have been investigated to yield statistically reliable models of considerable predictive power. In contrast to CoMFA, CoMSIA produces better results for the correlation. Moreover, the obtained CoMSIA contour maps that interpret the correlations in terms of field contributions allow physicochemical properties relevant for binding to be easily mapped back onto molecular structures, and thus elucidate structural features among ligands that are responsible for toxicities. Besides, most of the highlighted regions in CoMSIA and CoMFA contour maps are mirrored by features in the surrounding environment. Thereby, CoMFA and CoMSIA both help to give explanations of the toxic mechanism of tested compounds.     

论环境风险及其管理制度建设

在阐明环境风险和环境风险管理的概念和内涵的基础上,叙述了中国面临的主要环境风险,提出了中国环境风险管理制度建设的建议.并着重指出,国家应当对重点风险源进行直接管理.     

Surface catalyzed formation of polychlorinated dibenzo-p-dioxins/dibenzofurans during municipal waste incineration

A series of reactions was carried out on different surfaces using carbon and CuCl₂, and KCl or HCl as a Cl-source. The PCDD/PCDF congener distribution was seen to vary to a great extent but the isomer distribution remained fairly constant. It is concluded that thermodynamic properties are largely responsible for the PCDD/PCDF isomer distribution. With pentachlorobenzene Cl₂ elimination, assisted by oxygen, appears to be the major pathway for PCDD/PCDF formation.     

定量结构──活性相关研究进展

ＱＳＡＲ方法用于预测环境中化学品的归宿及其毒性与日骤增，本文着重研究ＱＳＡＲ方法在不同领域中的进展和成就，不仅论述了我们关心的ＱＳＡＲ文献进展本身，而且还讨论了它的基础部分。精选ＱＳＡＲ模式在生态毒理学中的应用以及物理化学性质的估算等，     

Knowledge and utilization of edible mushrooms by local populations of the rain forest of south Cameroon

Indigenous knowledge of edible fungi and their utilization by local populations were investigated in southern Cameroon from 1996 to 1999. Some 100 participants from the major ethnic groups, comprising Bantu farmers and Bagyeli (Pygmy) hunter-gatherers, were interviewed. Mushroom usage by 30 families, (319 persons), was monitored daily for over a year. Mushroom knowledge among both groups was extensive. Over 50 vernacular names were provided by respondents. In Bantu households, women and children, and to some extent hunters, harvest mushrooms. In contrast, the whole Bagyeli household participates. Bantu harvest mushrooms preferentially in secondary forests while Bagyeli collect them predominantly in primary forests. Mushroom consumption is low for both groups, 1.1 and 1.4 kg of fresh mushrooms per person per year, respectively, a rate that is much lower than in central and eastern Africa. The apparent discrepancy between extensive mushroom knowledge and rather infrequent mushroom consumption probably relates to the social valuation of mushrooms.     

Solubilization of substituted indole compounds by beta-cyclodextrin in water

The solubilization of four pairs of substituted indole compounds (SICs) by β-cyclodextrin (β-CD) in water was investigated. The results show that 1,2,3,4-tetrahydrocarbazole and N-methyl-1,2,3,4-tetrahydrocarbazole form 1:1 inclusion complexes with β-CD, while the other six SICs form 1:2 inclusion complexes, respectively. To each pair of SICs with similar structures, the differences between their solubilization in β-CD/water solutions has been explained by the difference of their contact area within the β-CD cavity, the difference of their molecule polarity, or the presence of hydrogen bond between SIC molecule and β-CD molecule.     

西安地区旅游景点水体卫生细菌学调查及保护对策

以粪大肠菌和异养细菌总数做指标，对西安地区旅游景点水体的卫生细菌学状况进行了调查。结果表明，西安市区内旅游景点的人工湖、天然湖等大都受到不同程度的污染，而离市区较远、海拔较高的旅游景点则污染较轻。