地理环境与时空行为对主观幸福感的影响研究进展     

马静  刘冠秋  饶婧雯 《地理科学进展》2022,41(4):718-730

主观幸福感是目前国内外研究热点,与提升居民生活质量和建设宜居城市密切相关。已有大部分文献侧重单一空间尺度的研究,分析社会经济属性和地理环境要素(包括建成环境、社会环境、环境污染)对主观幸福感的影响;也有部分研究关注居民日常出行属性和活动特征对主观幸福感的作用机制,探讨长期幸福感与短期幸福感的内在关系。论文对上述研究进行较为系统的梳理与评价,综合考虑地理环境、时空行为与主观幸福感的复杂关系,构建主观幸福感的理论研究框架,总结时空行为视角下多尺度、多维度地理环境要素对主观幸福感的影响机制以及作用路径,并探讨主观幸福感的时空动态规律以及微观行为机制,为改善城市人居环境、优化居民行为模式提供科学依据和政策建议。  相似文献   

Cultural characteristics of chromium resistant unicellular cyanobacteria isolated from local environment in Pakistan     

Abdul Hameed Shahida Hasnain 《中国海洋湖沼学报》2005,23(4):433-441

Many unicellular cyanobacteria were isolated from different places： fields, ponds, polluted water, and soils from Muredkey and Kasur tannery areas, near Lahore, Pakistan. Different media like BG 11 medium, Bold Basal medium, Chu＇s # 10 medium and Gotham＇s medium, in standard forms and with slight variations of ingredients, and different pH, temperature and light regimes were checked for the optimum growth of the isolates. The isolation pro- cedure was repeated with different concentrations of chromium to select the resistant strains. These selected strains grew on chromium of the range 100-200 μg/ml in BG 11 medium. Cyanobacteria were maintained in solid and liquid media with/without shaking. Cyanobacterial strains were collected from natural habitats that were accompanied by a diversified group of organisms including bacteria, protozoan, and rotifers etc. In order to eliminate these agents termed as contaminants, we used several methods including phenol treatment, use of antibiotic and careful manual picking of unicellular cyanobacteria. Resistance of these strains against different heavy metals （ZnSO4, MnSO4, NiSO4, COCl2, Pb（NO3）3, CuSO4, HgCl2, AgNO3 and CdCl2） and antibiotics （erythromycin, streptomycin, kanamycin, chloramphenicol, neomycin） was evaluated. Optimum temperature was 30℃ with variable pH for the reduction of Cr^6＋ in to Cr^3＋ in majority of strains.  相似文献   

环境治理的新军--地球化学工程学     

黄载环 《南方国土资源》2003,(7):35-35

地球化学是研究地球各部分(地壳、地幔、水圈、大气圈、生物圈等)中化学元素及其同位素的分布、存在形式、共生组合、集中分散及迁移循环规律的科学。 以地球化学理论为基础,利用优化自然过程改变地球化学作用方向,实现环境污染治理的技术和方法,称之为地球化学工程学,这是荷兰  相似文献   

秦巴山区环境污染及治理     

谢娟 《地球科学与环境学报》2001,23(2):65-67

对秦巴山区的开发利用，各种工业、厂矿在生产过程产生的“三废”(废气、废水、废渣)未经处理即任意排放，造成河流水质恶化，影响着秦岭的环境质量，提醒人们及早关注环境生态变化，加强环保意识，保护秦巴山区的生态平衡。  相似文献   

铀活化的地球化学抑制——评价老铀矿山环境的地球化学模式     

孙志富  陈璋如 《国外铀金地质》1996,13(3):235-240

  相似文献   

赤潮——海洋环境污染的产物     

张逢成 《地理教学》2002,(11):22-23

  相似文献   

关注"后发"地区的环境、土地问题     

耕夫 《南方国土资源》2008,(5):7-10

土地是民生之本,发展之基。土地问题是现代工业进程中一个带有全局性、战略性的重大问题。目前,广西工业化、城镇化水平比全国平均水平低很多,"八山一水一分田"的广西要加快推进工业化、城  相似文献   

The genotoxic effects of benzo[a]pyrene and methamidophos on black porgy evaluated by comet assay     

刘日先洪华生  王新红王克坚 王春光 《中国海洋湖沼学报》2005,23(4):455-460

In this study, two common pollutants （benzo[a]pyrene and methamidophos） in marine environment were tested by comet assay for their inducement of in vivo genotoxic effect to the blood cells of black porgy （ Acanthopagrus schlegeli）. The fish was exposed to 2 μg/L of benzo[a]pyrene （BaP） and methamidophos, and their mixture. The assay was performed on whole blood at 2 h, 5 h, 24 h and 96 h exposure intervals. A significant increase in DNA damage was observed in each treatment with the pollutants. Additive effect of BaP and methamidophos was also found in the experiment. However, the decrease ratios of DNA damage for 5 h and 96 h exposure interals compared with 2 h and 24 h exposure ones, respectively, were noticed. This phenomenon may be explained by the function of repairing process via enzyme cytochrome P450 in the animal. Evidence of the genotoxicity of organophosphorus pesticides （OPs） and polynuclear aromatic hydrocarbons （PAHs） on marine fish are discussed in this paper.  相似文献   

在国土资源领域推动循环经济发展的思考     

陈从喜 《河南国土资源》2006,(2):8-10

循环经济是以更少的资源，能源消耗．更低的环境污染和发挥我国人力资源优势来追求更大经济效益的经济增长模式。中央已把发展循环经济和建设资源节约型社会提到重要改革日程．作为一项战略性任务在全国推行。国土资源是发展循环经济的重要领域．国土资源在社会经济发展中既是基本的生产要素．又是社会经济发展的物质载体。  相似文献   

企鹅迮上灭亡之路     

《海洋世界》2009,(1):9-9

近日，美国鱼类和野生动物（FWS）公布：7个企鹅物种已加入北极熊的行列，登上濒危物种的名单。沦为气候变化和环境污染的牺牲品的企鹅物种包括：黄眼企鹅、白鳍企鹅、峡湾企鹅、竖冠企鹅、洪氏环企鹅，其中前4种生活在新西兰，洪氏环企鹅则来自于南美。情况最糟糕的是非洲企鹅，由于过度捕鱼和石油污染，它们已处在灭绝的边缘。根据FWS的统计，生存状况较好、  相似文献