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亚洲地区环境教育实践的探讨与借鉴 总被引:2,自引:0,他引:2
从环境教育的目标和任务,课程,教材,师资培训,公众参与等角度,分析了亚洲各国际环境教育发展的政策,方法,内容等方面的特色和经验,为我国的地区环境教育事业发展提供借鉴。 相似文献
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为了协调类似城市间的发展,促进区域统筹,引导其有序竞争,构建和谐的社会,以通州与南通两城市为例,积极引入生态优先的思想来处理两城市的职能关系、空间关系、环境保护以及其他可持续发展问题,力求扬长避短,节约发展成本,促进有序城市组群空间的形成,实现跨区域协调发展。 相似文献
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制服CO2排放的新探索 总被引:3,自引:0,他引:3
介绍了全球CO2排放的概况,反映了世界各国对温室效应所致的全球性气温上升极为关注,在这样的背景下,科学家对CO2排放的收集方法,包括生物吸收和化工利用等方法,做了许多有效的探索和试验,有的已接近工业实验阶段,如挪威石油界的见解,能源界对CO2排放更为关注,正在对各种矿物发电方式,结合环保意识,进行深入的方案性比较,并提出初步倾向性的意见,如荷兰科研界的见解。 相似文献
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危险废物管理和治理技术现状与探讨 总被引:5,自引:0,他引:5
通过对国内外危险废物管理现状及污染治理技术水平的对比分析,探讨了目前国内存在的问题及适合我国实际的危险废物治理技术发展趋势,并提出我国危险废物控制战略。 相似文献
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Hemispheric asymmetries and side biases have been studied in humans mostly in laboratory settings, and evidence obtained in
naturalistic settings is scarce. We here report the results of three studies on human ear preference observed during social
interactions in noisy environments, i.e., discotheques. In the first study, a spontaneous right-ear preference was observed
during linguistic exchange between interacting individuals. This lateral bias was confirmed in a quasi-experimental study
in which a confederate experimenter evoked an ear-orienting response in bystanders, under the pretext of approaching them
with a whispered request. In the last study, subjects showed a greater proneness to meet an experimenter’s request when it
was directly addressed to the right rather than the left ear. Our findings are in agreement both with laboratory studies on
hemispheric lateralization for language and approach/avoidance behavior in humans and with animal research. The present work
is one of the few studies demonstrating the natural expression of hemispheric asymmetries, showing their effect in everyday
human behavior. 相似文献
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鞍山市农药污染状况及防治途径 总被引:4,自引:0,他引:4
鞍山市的农药施用量近年来有了较大的增长,农药的大量使用带来了严重问题,污染环境、农产品农药残留超标、农业生态环境恶化。加强病虫害的综合防治,推广使用高效、低毒、低残留的农药和安全合理使用农药,是减少因施用农药带来的污染,恢复农业生态的有效途径。 相似文献
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丹江口水库对汉江中下游影响的生态学分析 总被引:1,自引:0,他引:1
基于黄家港水文站1954~2000年的日径流量资料,以1967年为节点,将47年水文序列划分为节点前的“近自然状态河流”和节点后的“人工干扰状态河流”两种水文情势。采用Richter提出的变动范围法,基于包含32个水文参数的水文改变指标体系,定量评估了黄家港水文站1967年前后水文情势的变化。根据分析,把1967年之前的各个水文参数的第1至第3四分位数间的数值范围设为管理目标。进一步分析了丹江口水库的修建对汉江中下游生态水文的影响。结果表明,1967年以后,丹江口水库的修建对汉江中下游水文情势的影响较为显著:极大地改变了径流的年内分配,使流量过程均化,使极值流量出现日期提前、历时缩短等等。在此基础上,结合汉江中下游河道生态系统的特点,以鱼类为指示生物,初步探讨了上述水文情势的变化对汉江中下游鱼类的生长、繁殖和越冬等带来的影响,并对如何降低不利影响提出了相应的改进措施. 相似文献
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Faouzi Herzi Natacha Jean Huiyu Zhao Stéphane Mounier Hassine Hadj Mabrouk Asma Sakka Hlaili 《Chemosphere》2013
In this study, metal contamination experiments were conducted to investigate the effects of copper and cadmium on the growth of the marine toxic dinoflagellate Alexandrium catenella and on the production of dissolved organic matter (Dissolved Organic Carbon: DOC; Fluorescent Dissolved Organic Matter: FDOM). This species was exposed to increasing concentrations of Cu2+ (9.93 × 10−10–1.00 × 10−7 M) or Cd2+ (1.30 × 10−8–4.38 × 10−7 M), to simulate polluted environments. The drastic effects were observed at pCu2+ = 7.96 (Cu2+: 1.08 × 10−8 M) and pCd2+ = 7.28 (Cd2+: 5.19 × 10−8 M), where cyst formation occurred. Lower levels of Cu2+ (pCu2+ > 9.00) and Cd2+ (pCd2+ > 7.28) had no effect on growth. However, when levels of Cu2+ and Cd2+ were beyond 10−7 M, the growth was totally inhibited. The DOC released per cell (DOC/Cell) was different depending on the exposure time and the metal contamination, with higher DOC/Cell values in response to Cu2+ and Cd2+, comparatively to the control. Samples were also analyzed by 3D-fluorescence spectroscopy, using the Parallel Factor Analysis (PARAFAC) algorithm to characterize the FDOM. The PARAFAC analytical treatment revealed four components (C1, C2, C3 and C4) that could be associated with two contributions: one, related to the biological activity; the other, linked to the decomposition of organic matter. The C1 component combined a tryptophan peak and a characteristic humic substances response, and the C2 component was considered as a tryptophan protein fluorophore. The C3 and C4 components were associated to marine organic matter production. 相似文献