全文获取类型
收费全文 | 134篇 |
免费 | 2篇 |
国内免费 | 2篇 |
专业分类
安全科学 | 8篇 |
废物处理 | 15篇 |
环保管理 | 11篇 |
综合类 | 6篇 |
基础理论 | 26篇 |
污染及防治 | 47篇 |
评价与监测 | 17篇 |
社会与环境 | 7篇 |
灾害及防治 | 1篇 |
出版年
2023年 | 7篇 |
2022年 | 15篇 |
2021年 | 9篇 |
2020年 | 6篇 |
2019年 | 9篇 |
2018年 | 6篇 |
2017年 | 8篇 |
2016年 | 13篇 |
2015年 | 4篇 |
2014年 | 11篇 |
2013年 | 18篇 |
2012年 | 6篇 |
2011年 | 5篇 |
2010年 | 5篇 |
2009年 | 4篇 |
2008年 | 5篇 |
2007年 | 1篇 |
2006年 | 1篇 |
2002年 | 1篇 |
2000年 | 2篇 |
1990年 | 1篇 |
1982年 | 1篇 |
排序方式: 共有138条查询结果,搜索用时 78 毫秒
51.
Mehdi Shafaeddin 《Resources Policy》1990,16(4)
This article explains that the nature of commodity price determination and the characteristics of the link between commodity prices and prices of manufactured goods are such that they have an inflationary and recessionary impact on the world economy. Subsequently, it argues that International Commodity Price Agreements (ICAs) and the Common Fund are not only in the interest of developing countries but are also in the vital interest of developed countries. They assist in stabilizing economic activities and sustaining recovery at a higher rate of growth of output and employment in these countries. Nevertheless, to be effective for these purposes, ICAs should cover a wide range of commodities and adequate financial resources should be available to the First Account of the Common Fund. 相似文献
52.
Makhdom Shima Shekarabi Seyed Pezhman Hosseini Shamsaie Mehrgan Mehdi 《Environmental science and pollution research international》2017,24(25):20634-20640
Environmental Science and Pollution Research - The possibility of using different densities of cherry tomato as a bio-filter in a simple media-based aquaponic system to recycle nutrients from pearl... 相似文献
53.
Roozbeh Mirza Mehdi Mohammadi Iraj Faghiri Ehsan Abedi Ali Fakhri Ali Azimi Mohammad Ali Zahed 《Environmental monitoring and assessment》2014,186(11):7387-7398
Samples of surface sediments from the Iranian coast of the Persian Gulf were examined to determine the levels and sources of 15 polycyclic aromatic hydrocarbons (PAHs). Samples were collected from 30 sampling sites and analyzed for PAHs by gas chromatography–mass spectrometry (GC-MS). Total concentrations of PAHs ranged from 93 to 4,077 ng g?1 dry weight. The PAH composition from 30 sampling sites was dominated by four-ring PAH compounds. Molecular indices based on the ratios of PAH concentrations were used to differentiate PAHs from pyrolitic to petrogenic and mixed origins. The results suggested that the main sources of PAHs in sediments from the studied region were mixed pyrolitic and petrogenic. Furthermore, benthic organisms in most of the investigated areas were not at ecotoxicological risk, according to the results from the effects range low (ERL)/effects range median (ERM) techniques suggested by the US Sediment Quality Guidelines (SQGs). 相似文献
54.
Sylvia Becerra Mehdi Saqalli Fabrice Gangneron Amadou Hamath Dia 《Regional Environmental Change》2016,16(5):1253-1265
Since the 1970s, precipitation in the Sahel has decreased and become very irregular, leading to widespread drought, whilst the human need for water has rapidly increased. A new “dispositions”-based approach was adapted in order to analyse human interactions with environmental hazards and applied to the case of Hombori village in north-eastern Mali. This article explores how the population and political stakeholders perceive, live with and respond to the increasing scarcity of water. It also explores how their current vulnerability and ability to cope with variations in available water resources indicate future adaptability to climate shocks. On the one hand, this research shows how the population copes with variations in water resource availability: the population’s socio-spatial organisation explains the inhabitants’ exposure to this problem and some of the factors affecting vulnerability, the elderly and women being the hardest hit. The water issue is generally managed on a “day-to-day” basis and considered a big problem only in the dry season, thus lowering any incentive for self-protection. The main two variables that could explain this kind of risk management are the conflicting local governance and current social rules. On the other hand, the discussion of results, based on a conceptual model of social responses, explains why these current “social dispositions” to cope with and even address the water scarcity issue do not guarantee future adaptability to climate change. 相似文献
55.
56.
Goscinny S Vandevijvere S Maleki M Van Overmeire I Windal I Hanot V Blaude MN Vleminckx C Van Loco J 《Chemosphere》2011,84(3):279-288
A study was performed to assess exposure of the Belgian population to HBCD diastereoisomers. Measurements of HBCD were performed by UPLC-MS/MS, on 45 composite samples from 5 major food groups: dairy (products), meat (products), eggs, fish (products) and a group of “other” products. The medium bound estimated average daily intake (EDI) of ΣHBCD in the Belgian population was 0.99 ng kg−1 bw d−1. The diastereoisomer contribution to the mean EDI showed a predominance of γ-HBCD at 67%, followed by α-HBCD at 25% and 8% for β-HBCD. These results are consistent with the pattern found in the two food groups contributing the most to the EDI: meat (products) and the group of “other” products. Anyway, it has to be noted that diastereomeric distribution of HBCD can change due to bioisomerisation in biological material. Levels of HBCD diastereoisomers found in Belgian food samples of animal origin were low in comparison with those found in other EU countries and the resulting EDI was substantially below the proposed thresholds. 相似文献
57.
58.
Riaz Umair Murtaza Ghulam Saifullah Farooq Muhammad Aziz Humera Qadir Ayesha Abdul Mehdi Shahzada Munawar Qazi Muhammad Akram 《Environmental science and pollution research international》2020,27(32):39742-39752
Environmental Science and Pollution Research - In the developing world, rapid urbanization and industrialization produces an enormous volume of wastes daily. This study was aimed to explore the... 相似文献
59.
Ammonia-oxidizing bacteria and phenol-degrading yeast were isolated in order to study the synergism effects of phenol-degrading yeast and ammonia-oxidizing bacteria for enhancing the nitrification in coke wastewater from the Isfahan Steel Company. The influent and effluent samples with approximately 600-1200 mg L(-1) ammonium and 550-2350 mg L(-1) phenol were collected aseptically in sterile flasks. The biodegradation of phenol and nitrification were studied with different treatments. The results showed that addition of Na2CO3 and autotrophic bacteria to wastewater increased the ammonium removal by 100%. Furthermore, the synergism effects of phenol-degrader yeast and autotrophic bacteria reduced the time for ammonium removal. 相似文献
60.
Recycled Natural Fiber Polypropylene Composites: Water Absorption/Desorption Kinetics and Dimensional Stability 总被引:1,自引:0,他引:1
Detailed analysis of the effects of recycling process on long-term water absorption, thickness swelling and water desorption
behavior of natural fiber polypropylene composites is reported. Composite materials containing polypropylene and wood flour,
rice hulls or bagasse fibers were produced at constant fiber loading and were exposed to a simulated recycling process consisting
of up to five times grinding and reprocessing under controlled conditions. A wide range of analytical methods including water
absorption/desorption tests, thickness swelling tests, density measurement, scanning electron microscopy, image analysis,
contact angle, fiber length analysis and Fourier transform infrared spectroscopy was employed to understand the hygroscopic
behavior of the recycled composites. Water absorption and thickness swelling behaviors were modeled using existing predictive
models. Results indicated that generally the recycled composites had considerably lower water absorption and thickness swellings
as compared with the original composites which were attributed to changes in physical and chemical properties of the composites
induced by the recycling process. 相似文献