全文获取类型
收费全文 | 70篇 |
免费 | 0篇 |
国内免费 | 5篇 |
专业分类
安全科学 | 16篇 |
废物处理 | 8篇 |
环保管理 | 3篇 |
综合类 | 10篇 |
基础理论 | 8篇 |
污染及防治 | 22篇 |
评价与监测 | 4篇 |
社会与环境 | 4篇 |
出版年
2023年 | 2篇 |
2022年 | 6篇 |
2021年 | 6篇 |
2020年 | 2篇 |
2019年 | 1篇 |
2018年 | 3篇 |
2017年 | 1篇 |
2016年 | 5篇 |
2015年 | 5篇 |
2014年 | 2篇 |
2013年 | 6篇 |
2012年 | 2篇 |
2011年 | 5篇 |
2010年 | 4篇 |
2009年 | 2篇 |
2008年 | 2篇 |
2007年 | 1篇 |
2006年 | 2篇 |
2005年 | 1篇 |
2004年 | 3篇 |
2003年 | 4篇 |
2001年 | 3篇 |
1999年 | 1篇 |
1993年 | 1篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1985年 | 1篇 |
排序方式: 共有75条查询结果,搜索用时 15 毫秒
11.
Dash Devi Prasad Dash Aruna Kumar Sethi Narayan 《Environmental science and pollution research international》2022,29(21):31252-31269
Environmental Science and Pollution Research - Overutilized hydro-energy production through non-sustainable mode is detrimental for both the economy and the environment. Intermittent consumption of... 相似文献
12.
Dr Harini Narayan Richard De Chazal Margaret Barrow Patricia McKeever Edmund Neale 《黑龙江环境通报》1993,13(10):893-901
Congenital diaphragmatic hernia (CDH) is a developmental defect of as yet unknown aetiology which accounts for 8 per cent of all major congenital anomalies and is associated with up to 80 per cent mortality despite optimal postnatal treatment. The risk of recurrence of CDH for future sibs after one affected infant is about 2 per cent. A multifactorial/threshold inheritance pattern with an observed high male:female sex ratio is currently favoured for the rare occurrence of familial CDH, although other modes of inheritance have also been described. We report three cases of familial CDH, two of whom were brother and sister sibs and the third was a first cousin, born within 18 months of each other. The diagnosis was by ultrasound and there were several factors predicting a poor outcome. The mortality in this group was 100 per cent. The prenatal diagnosis, treatment options, the unusual genetic aspects, outcome, and the pathology involved are discussed. 相似文献
13.
Foam extrusion of biodegradable polyester [poly(butylene adipate-co-terephthalate) (PBAT)] and its blends with maleated thermoplastic
starch (MTPS) using a chemical blowing agent was performed. The effect of MTPS and percentage of chemical blowing agent on
various foam properties is discussed. In general, an increased amount of PBAT in the foams improves the properties of the
foams. The foam samples were characterized by measurements of density, expansion ratio, specific length, compressive strength,
resiliency, moisture sorption, and imaging using digital light microscopy. Density, expansion ratio, and specific length measurements
show that the best characteristics of lowest density, highest expansion ratio, and highest specific length are exhibited by
the PBAT samples. The compressive strength and foam density exhibit a power-law relationship. Greater amounts of PBAT in the
samples increase the resiliency and decrease the steady state weight gain during moisture sorption. All samples show regions
of unfoamed material when only 3% chemical blowing agent is used, but when 5 and 7% chemical blowing agent is used, the samples
exhibit cells throughout the matrix. 相似文献
14.
Bhosle NB Garg A Harji R Jadhav S Sawant SS Krishnamurthy V Anil C 《Environment international》2006,32(2):252-258
Surface sediment samples were collected from various locations in the Mumbai and Kochi harbours, west coast of India, to assess the presence of butyltin compounds. Tributyltin (TBT) and dibutyltin (DBT) varied from 16 to 16,816 ng/g dry wt. and from undetected to 469 ng/g dry wt., respectively, of the sediment in Kochi harbour. In Mumbai harbour, the values of TBT and DBT ranged between 4.5 and 1193 ng/g dry wt. and from undetected to 131 ng/g dry wt. of the sediments, respectively. The concentrations of both TBT and DBT showed strong seasonal variation probably due to the effect of tides and currents. Nevertheless, the levels of butyltin compounds were generally higher at sites influenced by shipping activities such as navigation, dry dock and ship-building activities. The presence of DBT indicates the abiotic or microbiological degradation of TBT. Compared to TBT, DBT was relatively less abundant, suggesting either fresh inputs of TBT and/or less degradation of TBT. The concentrations of TBT showed significant positive relationships with organic carbon and lipid, implying that both lipophilic and ionic interactions were probably involved in controlling the abundance of TBT at these sediments. The observed levels of butyltin compounds are much higher than those required to induce toxic effects on marine organisms, suggesting that these sediments were contaminated with butyltin compounds. 相似文献
15.
16.
Bhattarai Tek Narayan Ghimire Swastik Mainali Bandita Gorjian Shiva Treichel Helen Paudel Shukra Raj 《Environmental science and pollution research international》2023,30(10):25452-25476
Environmental Science and Pollution Research - Energy transformation and sustainability have become a challenge, especially for developing countries, which face broad energy-related issues such as... 相似文献
17.
Rheological and Thermal Properties of the PLA Modified by Electron Beam Irradiation in the Presence of Functional Monomer 总被引:1,自引:0,他引:1
Boo Young Shin Do Hung Han Ramani Narayan 《Journal of Polymers and the Environment》2010,18(4):558-566
Polylactic acid (PLA) has been modified by electron beam radiation in the presence of glycidyl methacrylate (GMA) to enhance
the melt strength of PLA. The modified PLA was prepared by varying both the amount of GMA and the irradiation dose and was
characterized by observing the thermal properties, the melt viscoelastic properties and the gel fraction. For comparison,
virgin PLA was also irradiated. All irradiated virgin PLA had a lower complex viscosity and a storage modulus compared to
virgin PLA due to irradiation-induced chain scission. However, these properties were remarkably improved due to formation
of long chain branching and retarding chain scission if GMA was introduced in this system. The increase in melt viscoelastic
property was much dependent on the irradiation dose. At optimum doses of radiation, it showed maximum complex viscosity and
storage modulus. The PLA irradiated with 20 kGy in the presence of 3 phr GMA showed a complex viscosity of about 10 times
higher and a storage modulus of 100 times higher than those of virgin PLA at 0.1 rad/s. Gel fraction measurement revealed
that chain scission and branching was more dominant than crosslinking. The biodegradability of irradiated PLA was slightly
decreased by the presence of GMA. 相似文献
18.
Narayan Dhital Frédéric Raulier Pierre Y. Bernier Marie-Pierre Lapointe-Garant Frank Berninger Yves Bergeron 《Journal of Environmental Planning and Management》2015,58(12):2228-2249
Ecosystem-based management (EBM) of forests is gaining acceptance for its focus on the maintenance of the long-term integrity of ecosystem processes, but climate change challenges this view because of its impacts on these very processes. We have therefore evaluated the robustness of EBM to projected climate change, considering the role of climate on forest growth and fire regime in a boreal forest of eastern Canada. A climate sensitive growth index model was calibrated for three commercial species and used to project the evolution of merchantable volume for two climate scenarios (B1 and A2) under conventional and EBM strategies. Current burn rate and burn rates under future climate scenarios were also considered. Under the most extreme projected climate scenario, the periodic timber supply could be reduced by up to 79% through direct (growth reduction) and indirect (fire) effects. However, ecological indicators show that EBM is a more robust forest management strategy than conventional one demonstrating its adaptation potential to climate change at least in the short term. 相似文献
19.
Bagchi Somdipta Sahoo Rudra Narayan Behera Manaswini 《Environmental science and pollution research international》2022,29(41):61803-61810
Environmental Science and Pollution Research - The microbial fuel cell (MFC) is one of the sustainable technologies, which alongside treating wastewater, can generate electricity. However, its... 相似文献
20.