全文获取类型
收费全文 | 74篇 |
免费 | 0篇 |
国内免费 | 5篇 |
专业分类
安全科学 | 5篇 |
废物处理 | 9篇 |
环保管理 | 1篇 |
综合类 | 21篇 |
基础理论 | 11篇 |
环境理论 | 1篇 |
污染及防治 | 27篇 |
评价与监测 | 2篇 |
社会与环境 | 2篇 |
出版年
2022年 | 3篇 |
2021年 | 2篇 |
2020年 | 1篇 |
2019年 | 3篇 |
2018年 | 3篇 |
2017年 | 2篇 |
2016年 | 5篇 |
2015年 | 5篇 |
2014年 | 2篇 |
2013年 | 5篇 |
2012年 | 6篇 |
2011年 | 8篇 |
2010年 | 5篇 |
2009年 | 5篇 |
2008年 | 7篇 |
2007年 | 4篇 |
2006年 | 5篇 |
2005年 | 1篇 |
2004年 | 2篇 |
2003年 | 2篇 |
2002年 | 2篇 |
1991年 | 1篇 |
排序方式: 共有79条查询结果,搜索用时 15 毫秒
41.
42.
Yuanyuan Zhang Masashi Kuroda Shunsuke Arai Fumitaka Kato Daisuke Inoue Michihiko Ike 《Frontiers of Environmental Science & Engineering》2019,13(5):68
43.
44.
The excess growth of cyanobacteria in semi enclosed water areas caused by eutrophication brings about coagulation inhibition in drinking water treatment processes. In this study, coagulation inhibitor proteins produced by Microcystis aeruginosa, a major cyanobacterium in algal bloom, were acquired by a phage display technique, an aluminum-immobilized affinity chromatography and a protein expression technique using Escherichia coli cells. Two cyanobacterial peptides with a high ratio of metallophilic amino acids were recovered, which were a part of homologues of a thiol oxidase enzyme Ero1p and a trans-acting repressor ArsR. It was also shown that the homologue of ArsR exhibited a stronger inhibitory effect on the coagulation of kaolin suspension with polyaluminum chloride than the control proteins. This is the first report to identify a cyanobacterial cell component to inhibit coagulation. The compositions of polar amino acids were critical to explain the strength of coagulation inhibition potential. Polar proteins from cyanobacteria could collectively consume coagulants or stabilize clay particles, which would be plausible explanations for causing coagulation inhibition. Meanwhile, results from the kaolin coagulation tests using the control proteins implied that the neutralization of positive charges of coagulant constituents by simple electrostatic interactions might not be the key mechanism on the protein-induced coagulation inhibition. 相似文献
45.
A three-dimensional/high-resolution transport model for persistent organic pollutants (POPs) has been developed for the East China Sea (ECS). The POPs model has four compartments (gaseous, dissolved, phytoplankton-bound, and detritus-bound phases) and includes processes for diffusive air-water exchange, phytoplankton uptake/depuration to POPs, decomposition of dissolved phase, vertical sinking of phytoplankton, detritus production by phytoplankton mortality, and vertical sinking and decomposition of detritus. The POPs model is coupled with an ocean circulation model that can reproduce the seasonal variation in physical variables to represent the advection and diffusion of POPs. We applied the POPs model to the polychlorinated biphenyl congener 153 (PCB 153) from the atmosphere and examined the behavior of PCB 153 in the ocean. The model showed a remarkable seasonal variability of PCB 153. Concentrations in the dissolved and particulate phases are high in winter (January-March) and low in summer (July-September). In coastal regions, where chlorophyll a concentration is high, horizontal and vertical distributions in the dissolved and particulate PCB 153 concentrations are strongly affected by phytoplankton uptake. The sensitivity experiments on the dynamics of PCB 153 suggested that a change of Henry’s law constant associated with water temperature is the major factor controlling the seasonal variability of PCB 153. The model-based yearly mass balance of PCB 153 in the ECS indicated that most of the atmospheric input (35.5 kg year−1) is removed by the horizontal advection outside the ECS (19.0 kg year−1) and accumulates to the sea bottom by vertical sinking (15.7 kg year−1). For comparison with PCB 153, we also conducted simulations for PCB 52, 101, and 180. The seasonal variations are similar to that of PCB 153. The mass balance of PCB 52 that has short half-life time and less hydrophobic property shows the different results compared with PCB 101, 153, and 180. 相似文献
46.
Inoue Daisuke Sawada Kazuko Tsutsui Hirofumi Fujiwara Taku 《Journal of Material Cycles and Waste Management》2018,20(1):353-360
Journal of Material Cycles and Waste Management - This study was conducted to clarify the fates of whole nitrogen cycle-associated microorganisms during laboratory-scale composting of cattle manure... 相似文献
47.
Daisuke Numata 《Journal of Material Cycles and Waste Management》2016,18(3):582-588
To recycle or reuse used containers, it is necessary first to collect them. One way to do this is to give rewards to persons who return used packaging and containers to designated places. Many Japanese university cooperatives use recyclable lunch boxes for take-out food, and they collect used boxes in a variety of ways, including such reward giving. By analyzing the responses of university cooperatives to questionnaires on the ways that they collect used recyclable lunch boxes, this study examines the effect of this reward giving on the collection rate. The study results suggest that cash rewards are more effective in increasing the rate of return of used containers than setting up collection boxes that offer no rewards upon return, or giving point-based rewards. 相似文献
48.
49.
50.
Bin He Taikan Oki Fubao Sun Daisuke Komori Shinjiro Kanae Yi Wang Hyungjun Kim Dai Yamazaki 《Journal of environmental management》2011
Artificial Neural Network (ANN) is a flexible and popular tool for predicting the non-linear behavior in the environmental system. Here, the feed-forward ANN model was used to investigate the relationship among the land use, fertilizer, and hydrometerological conditions in 59 river basins over Japan and then applied to estimate the monthly river total nitrogen concentration (TNC). It was shown by the sensitivity analysis, that precipitation, temperature, river discharge, forest area and urban area have high relationships with TNC. The ANN structure having eight inputs and one hidden layer with seven nodes gives the best estimate of TNC. The 1:1 scatter plots of predicted versus measured TNC were closely aligned and provided coefficients of errors of 0.98 and 0.93 for ANNs calibration and validation, respectively. From the results obtained, the ANN model gave satisfactory predictions of stream TNC and appears to be a useful tool for prediction of TNC in Japanese streams. It indicates that the ANN model was able to provide accurate estimates of nitrogen concentration in streams. Its application to such environmental data will encourage further studies on prediction of stream TNC in ungauged rivers and provide a useful tool for water resource and environment managers to obtain a quick preliminary assessment of TNC variations. 相似文献