全文获取类型
收费全文 | 71篇 |
免费 | 1篇 |
专业分类
安全科学 | 12篇 |
废物处理 | 2篇 |
环保管理 | 2篇 |
综合类 | 14篇 |
基础理论 | 8篇 |
污染及防治 | 25篇 |
评价与监测 | 7篇 |
社会与环境 | 2篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 1篇 |
2018年 | 4篇 |
2017年 | 4篇 |
2016年 | 3篇 |
2015年 | 1篇 |
2014年 | 3篇 |
2013年 | 6篇 |
2012年 | 7篇 |
2011年 | 4篇 |
2010年 | 7篇 |
2009年 | 3篇 |
2008年 | 6篇 |
2007年 | 3篇 |
2006年 | 2篇 |
2005年 | 1篇 |
2003年 | 1篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1997年 | 2篇 |
1995年 | 1篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1985年 | 1篇 |
排序方式: 共有72条查询结果,搜索用时 359 毫秒
51.
Jussila MM Zhao J Suominen L Lindström K 《Environmental pollution (Barking, Essex : 1987)》2007,146(2):510-524
Molecular profiling methods for horizontal transfer of aromatics-degrading plasmids were developed and applied during rhizoremediation in vivo and conjugations in vitro. pWW0 was conjugated from Pseudomonas to Rhizobium. The xylE gene was detected both in Rhizobium galegae bv. officinalis and bv. orientalis, but it was neither stably maintained in orientalis nor functional in officinalis. TOL plasmids were a major group of catabolic plasmids among the bacterial strains isolated from the oil-contaminated rhizosphere of Galega orientalis. A new finding was that some Pseudomonas migulae and Pseudomonas oryzihabitans strains harbored a TOL plasmid with both pWW0- and pDK1-type xylE gene. P. oryzihabitans 29 had received the archetypal TOL plasmid pWW0 from Pseudomonas putida PaW85. As an application for environmental biotechnology, the biodegradation potential of oil-polluted soil and the success of bioremediation could be estimated by monitoring changes not only in the type and amount but also in transfer of degradation plasmids. 相似文献
52.
Stomatal characteristics and infection biology of Pyrenopeziza betulicola in Betula pendula trees grown under elevated CO2 and O3 总被引:2,自引:0,他引:2
Riikonen J Syrjälä L Tulva I Mänd P Oksanen E Poteri M Vapaavuori E 《Environmental pollution (Barking, Essex : 1987)》2008,156(2):536-543
Two silver birch clones were exposed to ambient and elevated concentrations of CO2 and O3, and their combination for 3 years, using open-top chambers. We evaluated the effects of elevated CO2 and O3 on stomatal conductance (gs), density (SD) and index (SI), length of the guard cells, and epidermal cell size and number, with respect to crown position and leaf type. The relationship between the infection biology of the fungus (Pyrenopeziza betulicola) causing leaf spot disease and stomatal characteristics was also studied. Leaf type was an important determinant of O3 response in silver birch, while crown position and clone played only a minor role. Elevated CO2 reduced the gs, but had otherwise no significant effect on the parameters studied. No significant interactions between elevated CO2 and O3 were found. The infection biology of P. betulicola was not correlated with SD or gs, but it did occasionally correlate positively with the length of the guard cells. 相似文献
53.
Pujari PR Nanoti M Nitnaware VC Khare LA Thacker NP Kelkar PS 《Environmental monitoring and assessment》2007,134(1-3):271-278
On-site sanitation is increasingly adopted in urban cities in India. The adoption of On-site sanitation system puts the groundwater
resources in the vicinity of the system at a greater risk. Microbial contaminants as well as chemical contaminants like Chloride
and Nitrate are generated from human waste. These contaminants travel through the medium and ultimately get in contact with
the groundwater. Hence, the groundwater sources are vulnerable to nitrate contamination near the On-site sanitation systems.
The present study indicates significant Nitrate and Chloride contamination in samples collected close to On-site sanitation
systems. The recommended limit set by the Bureau of Indian standards (BIS) limit of 45 mg/l for Nitrate concentration is also
exceeded in few samples. The study indicates that Bacterial as well as Nitrate contamination is more in Monsoon as compared
to Summer. 相似文献
54.
Mika Nieminen Marjo Palviainen Sakari Sarkkola Ari Laurén Hannu Marttila Leena Finér 《Ambio》2018,47(5):523-534
Drained peatlands are an important source of forest biomass in boreal regions and ditch network maintenance (DNM) operations may be needed to restore the drainage functions of ditches. By reviewing the available literature, as well as utilizing an existing hydrological model and analyzing the characteristics of eroded sediments, we assessed the impacts of DNM on runoff and exports of suspended solids (SS), dissolved organic carbon (DOC), nitrogen (N), and phosphorus (P). In general, DNM had minor impact on runoff and dissolved N and P, and it decreased rather than increased DOC exports. To increase the understanding of the hydrochemical impacts of DNM, future research should focus on the characteristics of SS and particulate nutrient exports. A major gap in knowledge is also the very limited regional representativeness of the available studies. High erosion risk in the ditches reaching the mineral soil below peat should be acknowledged when planning mitigation measures. 相似文献
55.
Györgyi Bela Taru Peltola Juliette C. Young Bálint Balázs Isabelle Arpin György Pataki Jennifer Hauck Eszter Kelemen Leena Kopperoinen Ann Van Herzele Hans Keune Susanne Hecker Monika Suškevičs Helen E. Roy Pekka Itkonen Mart Külvik Miklós László Corina Basnou Joan Pino Aletta Bonn 《Conservation biology》2016,30(5):990-999
The number of collaborative initiatives between scientists and volunteers (i.e., citizen science) is increasing across many research fields. The promise of societal transformation together with scientific breakthroughs contributes to the current popularity of citizen science (CS) in the policy domain. We examined the transformative capacity of citizen science in particular learning through environmental CS as conservation tool. We reviewed the CS and social‐learning literature and examined 14 conservation projects across Europe that involved collaborative CS. We also developed a template that can be used to explore learning arrangements (i.e., learning events and materials) in CS projects and to explain how the desired outcomes can be achieved through CS learning. We found that recent studies aiming to define CS for analytical purposes often fail to improve the conceptual clarity of CS; CS programs may have transformative potential, especially for the development of individual skills, but such transformation is not necessarily occurring at the organizational and institutional levels; empirical evidence on simple learning outcomes, but the assertion of transformative effects of CS learning is often based on assumptions rather than empirical observation; and it is unanimous that learning in CS is considered important, but in practice it often goes unreported or unevaluated. In conclusion, we point to the need for reliable and transparent measurement of transformative effects for democratization of knowledge production. 相似文献
56.
John A. McGrath James R. McMillan M. Giles S. Dunnill Leena Pulkkinen Angela M. Christiano Charles H. Rodeck Robin A. J. Eady Dr. Jouni Uitto MD PhD 《黑龙江环境通报》1995,15(7):647-654
Fetal skin biopsy at 20 weeks' gestation in a woman at risk for a child with the lethal skin-blistering disorder junctional epidermolysis bullosa (Herlitz) confirmed an affected fetus. Genomic DNA from the aborted fetus was examined for mutations in laminin 5, a macromolecule involved in adhesion at the dermal-epidermal junction, and a candidate protein in this condition. Polymerase chain reaction (PCR) amplification of exon 10 and parts of the flanking introns of the gene encoding the β3 chain of laminin 5 (LAMB3) and subsequent analysis by agarose gel electrophoresis showed a more slowly migrating band in the affected fetus compared with the normal control. Nucleotide sequencing of the abnormal PCR product revealed a homozygous 77 bp duplication within the exon, resulting in a premature termination codon 250 bp downstream from the 3′ end of the duplication. Maternal DNA was heterozygous for the mutant and wild-type alleles. These findings illustrate the genetic basis of the skin disease in this case and also offer the prospects of a simple, rapid, and reliable first-trimester DNA-based prenatal, or even preimplantation, diagnostic test for future pregnancies in this family. 相似文献
57.
Loikkanen Emil Oristo Satu Hämäläinen Natalia Jokelainen Pikka Kantala Tuija Sukura Antti Maunula Leena 《Food and environmental virology》2020,12(4):333-341
Food and Environmental Virology - The main animal reservoirs of zoonotic hepatitis E virus (HEV) are domestic pigs and wild boars, but HEV also infects cervids. In this study, we estimated the... 相似文献
58.
Eira Ihalainen Leena Lindström Johanna Mappes Sari Puolakkainen 《Behavioral ecology and sociobiology》2008,62(8):1267-1276
Müllerian co-mimics are aposematic species that resemble each other; sharing a warning signal is thought to be mutually beneficial
for the co-mimics by reducing per capita predation risk. In Batesian mimicry, edible mimics avoid predation by resembling
an aposematic model species. The protection of both the model and the mimic is weakened when the mimics are abundant compared
to the models. The quasi-Batesian view suggests that defended (Müllerian) co-mimics, when unequal in their defences, could
also show a Batesian-like trend of increasing mortality with increasing abundance of a less defended “mimic”. We manipulated
frequencies of unequally distasteful artificial co-mimics that were prey for great tits. The co-mimics had different signals
(imperfect mimicry) but were equally preferred by the birds when palatable. Unexpectedly, when unpalatable, one of the signals
was easier for the birds to learn to avoid. Consequently, during predator learning, the signal design of the prey strongly
affected mortality of the co-mimics; there was an interaction between the signal and frequency treatments, but increasing
the frequency of a less defended “mimic” did not increase co-mimic mortalities as predicted. In contrast, in a memory test
that followed, the effect of signal design disappeared; if the birds had experienced high frequency of “mimics” during learning,
co-mimic mortalities did subsequently increase. Since the effect of co-mimic frequencies on mortalities changed depending
on the signal design of the prey and predator experience, the results suggest that mimetic relationship may be an unpredictable
interplay of several factors in addition to taste and abundance. 相似文献
59.
Characteristics and formation of leachates from waste gasification and grate firing bottom ash were studied using continuous field measurements from 112 m3 lysimeters embedded into landfill body for three years. In addition, the total element concentrations of the fresh ash were analysed and laboratory batch tests were performed to study leachate composition. The three-year continuous flow measurement showed that about one fifth of the leachates were formed, when the flow rate was >200 l/d, covering <3.5% of the study time. After three years, the liquid/solid-ratio for the quenched grate ash was 1 (l/kg (d.m.)) and for the initially dry gasification ash 0.4 (l/kg (d.m.)). The low initial water and residual carbon content of the gasification ash kept the leachate pH at a high level (>13) major part of the study. In the grate ash leachate pH was lower (<8) due to the presence of organic carbon and biodegradation indicated by biological oxygen demand and redox potential measurements. In the gasification ash the high pH probably delayed leaching of major elements such as Ca, therefore, raising the need for a longer after-care period. The high pH also explains the higher leaching of As from the gasification ash compared to the grate ash both in the batch test and under landfill conditions. 相似文献
60.
Toxicity of waste gasification bottom ash leachate from landfill lysimeters (112 m(3)) was studied over three years. The leachate of grate incineration bottom ash from a parallel setup was used as reference material. Three aquatic organisms (bioluminescent bacteria, green algae and water flea) were used to study acute toxicity. In addition, an ethoxyresorufin-O-deethylase (EROD) assay was performed with mouse hepatoma cells to indicate the presence of organic contaminants. Concentrations of 14 elements and 15 PAH compounds were determined to characterise leachate. Gasification ash leachate had a high pH (9.2-12.4) and assays with and without pH adjustment to neutral were used. Gasification ash leachate was acutely toxic (EC(50) 0.09-62 vol-%) in all assays except in the algae assay with pH adjustment. The gasification ash toxicity lasted the entire study period and was at maximum after two years of disposal both in water flea (EC(50) 0.09 vol-%) and in algae assays (EC(50) 7.5 vol-%). The grate ash leachate showed decreasing toxicity during the first two years of disposal in water flea and algae assays, which then tapered off. Both in the grate ash and in the gasification ash leachates EROD-activity increased during the first two years of disposal and then tapered off, the highest inductions were observed with the gasification ash leachate. The higher toxicity of the gasification ash leachate was probably related to direct and indirect effects of high pH and to lower levels of TOC and DOC compared to the grate ash leachate. The grate ash leachate toxicity was similar to that previously reported in literature, therefore, confirming that used setup was both comparable and reliable. 相似文献