排序方式: 共有39条查询结果,搜索用时 46 毫秒
31.
Francis Strobbe Mark A. McPeek Marjan De Block Robby Stoks 《Behavioral ecology and sociobiology》2011,65(2):241-247
Despite the importance of foraging activity for the growth/predation risk trade-off, studies that demonstrated predator-induced
survival selection on foraging activity under semi-natural conditions are relatively rare. Here, we tested for fish-induced
selection for reduced foraging activity in two larval Enallagma damselflies using a field enclosure experiment. Fish imposed considerable mortality in both damselfly species and survival
selection on foraging activity could be detected in Enallagma geminatum. We did not detect selection in Enallagma hageni, probably because this species already was not eating very much in the absence of fish compared to E. geminatum. Both species responded strongly to the presence of predators by reducing their foraging activity. The documented survival
selection on foraging activity was detected despite the already low activity levels in fish lake prey species and despite
strong predator-induced plasticity in this trait. 相似文献
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33.
Sonocatalytic degradation of tetracycline antibiotic in aqueous solution by sonocatalysis 总被引:1,自引:0,他引:1
Mohammad Hoseini Gholam Hossein Safari Hossein Kamani Jalil Jaafari Marjan Ghanbarain 《毒物与环境化学》2013,95(10):1680-1689
Tetracycline (TC), one of the most common antibiotics, is often poorly bio-degraded in conventional wastewater treatment plants. In this study, the sonocatalytic degradation of TC was investigated using TiO2 nano-particles as catalyst. The effect of pH, initial TC concentrations, reaction times, and H2O2 concentrations were evaluated. The efficacy of ultrasonic irradiation alone in the removal of this pollutant was negligible but removal efficiency increased upon addition of TiO2 up to 250 mg L?1; increase of pH and initial TC concentration attenuated TC degradation. Addition of H2O2 raised the removal efficiency so that complete removal of TC was achieved within 75 min. 相似文献
34.
Jeroen Aerts Marjan Van Herwijnen Ron Janssen Theodor Stewart 《Journal of Environmental Planning and Management》2005,48(1):121-142
This study examines the use of spatial optimization techniques for multi-site land-use allocation problems (MLUA). 'Multi-site' refers to the problem of allocating more than one land-use type in an area, which are difficult problems as they involve multiple stakeholders with conflicting goals and objectives. Spatial optimization methods consist of (1) an optimization model and (2) an algorithm to solve the model. This study demonstrates a goal-programming model to solve the MLUA problem. The model is solved using both simulated annealing and genetic algorithms. Special attention has been given to introduce a spatial compactness objective in the model. It is shown that the compactness objectives in the optimization model generate compact patches of the same land use for using both the simulated annealing procedure and the genetic algorithm. In addition, it appears that using the proper settings of the compactness objectives, connectivity between patches of land use is promoted. The method is tested for a fictive study and then demonstrated for a real case study, both measuring 20 × 20 cells. The genetic algorithm generally performs better than simulated annealing in terms of solution time and achieving compactness. 相似文献
35.
Journal of Polymers and the Environment - In this study, we produced a novel chemical cross-linked Guar gum/Poly(methylvinylether-alt-maleicacid) (GG/PMVE-MA) hydrogels with various blending weight... 相似文献
36.
Mohebian Zahra Tajmohammadi Issa Yavari Maroufi Leila Ramezani Soghra Ghorbani Marjan 《Journal of Polymers and the Environment》2022,30(3):867-877
Journal of Polymers and the Environment - Newly, the usage of nanofibers (NFs) as wound dressings with the aim of their rapid healing and prevention of bacterial infection has been considered by... 相似文献
37.
Characterization of Alginate Hydrogel Beads Loaded with Thyme and Clove Essential Oils Nanoemulsions
Mostaghimi Mahsa Majdinasab Marjan Hosseini Seyed Mohammad Hashem 《Journal of Polymers and the Environment》2022,30(4):1647-1661
Journal of Polymers and the Environment - The present study aimed to evaluate the characteristics of alginate beads filled with thyme and clove essential oils nanoemulsions (EONs). The droplet size... 相似文献
38.
Alipour Mahdieh Aghazadeh Marziyeh Ramezani Soghra Taherzadeh Sana Ghorbani Marjan Aghazadeh Zahra 《Journal of Polymers and the Environment》2022,30(6):2579-2588
Journal of Polymers and the Environment - Eelectrospun fibrous mats for oral ulcer dressing should be able to attach oral mucosa in a high moisture environment and provide desirable therapeutic... 相似文献
39.
Zulkernain Nur Hanis Basant Nikita Ng Chuck Chuan Kriti Salari Marjan Mallick Shekhar 《Journal of Material Cycles and Waste Management》2023,25(5):2726-2752
Journal of Material Cycles and Waste Management - E-waste, also known as waste from electrical and electronic equipment, is a solid waste that accumulates quickly due to high demand driven by the... 相似文献