全文获取类型
收费全文 | 198篇 |
免费 | 1篇 |
国内免费 | 3篇 |
专业分类
安全科学 | 3篇 |
废物处理 | 39篇 |
环保管理 | 8篇 |
综合类 | 26篇 |
基础理论 | 41篇 |
污染及防治 | 67篇 |
评价与监测 | 7篇 |
社会与环境 | 9篇 |
灾害及防治 | 2篇 |
出版年
2023年 | 1篇 |
2022年 | 2篇 |
2021年 | 4篇 |
2020年 | 2篇 |
2018年 | 6篇 |
2017年 | 2篇 |
2016年 | 3篇 |
2015年 | 3篇 |
2014年 | 3篇 |
2013年 | 12篇 |
2012年 | 4篇 |
2011年 | 14篇 |
2010年 | 3篇 |
2009年 | 16篇 |
2008年 | 10篇 |
2007年 | 15篇 |
2006年 | 16篇 |
2005年 | 12篇 |
2004年 | 11篇 |
2003年 | 16篇 |
2002年 | 5篇 |
2001年 | 6篇 |
2000年 | 2篇 |
1999年 | 4篇 |
1997年 | 6篇 |
1996年 | 2篇 |
1995年 | 4篇 |
1994年 | 3篇 |
1993年 | 1篇 |
1989年 | 2篇 |
1987年 | 1篇 |
1984年 | 3篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1973年 | 1篇 |
1972年 | 1篇 |
1969年 | 1篇 |
1968年 | 1篇 |
1965年 | 1篇 |
1961年 | 1篇 |
排序方式: 共有202条查询结果,搜索用时 13 毫秒
101.
Kazuhiro Tanaka 《Die Naturwissenschaften》2001,88(10):431-433
The influence of prey animals on the supercooling ability of the house spider, Achaearanea tepidariorum, was studied by feeding spiders with field-collected and laboratory-cultured prey animals. Irrespective of the prey species supplied, spiders given field-collected prey had a higher supercooling point than those given laboratory-cultured counterparts. This means that (1) the field prey animals contained some efficient ice nucleators, whereas the laboratory animals were free from such substances and (2) the ice nucleators must be of external origin. Several lines of evidence also suggest that, under natural conditions, potential prey animals for the house spider are highly contaminated with ice nucleators. 相似文献
102.
Sang-Yul Kim Nobutoshi Tanaka Toshihiko Matsuto Yasumasa Tojo 《Waste management & research》2005,23(3):220-229
Two new pre-treatment methods (water-washing/carbonation and carbonation/phosphate stabilization) of municipal solid waste (MSW) incinerator residues were evaluated by column leaching tests under aerobic conditions and anaerobic conditions (which were changed to aerobic conditions after 10 months). A mixture of bottom ash and fly ash (5:1 ratio) was pre-treated using each method. Shredded incombustible residues (SIR) were added to each ash preparation in proportions similar to the ratios present in landfills. For comparison, landfill wastes typical of Japan, namely, a mixture of bottom ash, chelating-pre-treated fly ash, and SIR, were also examined. Leachate samples were collected periodically and analysed over a 15-month period. When compared with chelating pretreatment, both water-washing/carbonation and carbonation/ phosphate stabilization reduced the leaching of Pb, Al, and Cu by about one to two orders of magnitude. Moreover, the initial concentrations of Ca and Pb in leachates from column of water-washing/carbonation were 56-57% and 84-96% less than those from the column of carbonation/phosphate stabilization. Therefore, water-washing/carbonation was considered to be a promising approach to obtain early waste stabilization and to reduce the release of heavy metals to near-negligible levels. The leaching behaviour of elements was also discussed. 相似文献
103.
Wang Q Matsufuji Y Dong L Huang Q Hirano F Tanaka A 《Waste management (New York, N.Y.)》2006,26(8):815-824
Landfills can produce a great amount of leachate containing highly concentrated organic matter. This is especially true for the initial leachate from landfilled municipal solid wastes (MSW) that generally has concentrations of COD(Cr) and BOD(5) up to 80,000 and 50,000mg/L, respectively. The leachate could be disposed by means of recirculating technique, which decomposes the organics through the action of proliferating microorganisms and thereby purifies the leachate, and simultaneously accelerates organic decomposition through water saturation control. Data from experimental results indicated that leachate recirculating could reduce the organic concentration considerably, with a maximum reduction rate of COD(Cr) over 95%; and, using a semi-aerobic process, NH(3)-N concentration of treated leachate could be under 10mg/L. In addition, the organic concentration in MSW decreased greatly. 相似文献
104.
TiO2 powder-containing paper composites, called TiO2 paper, were prepared by a papermaking technique, and their photocatalytic efficiency was investigated. The TiO2 paper has a porous structure originating from the layered pulp fiber network, with TiO2 powders scattered on the fiber matrix. Under UV irradiation, the TiO2 paper decomposed gaseous acetaldehyde more effectively than powdery TiO2 and a pulp/TiO2 mixture not in paper form. Scanning electron microscopy and mercury intrusion analysis revealed that the TiO2 paper had characteristic unique voids ca. 10 μm in diameter, which might have contributed to the improved photocatalytic performance. TiO2 paper composites having different void structures were prepared by using beaten pulp fibers with different degrees of freeness and/or ceramic fibers. The photodecomposition efficiency was affected by the void structure of the photocatalyst paper, and the initial degradation rate of acetaldehyde increased with an increase in the total pore volume of TiO2 paper. The paper voids presumably provided suitable conditions for TiO2 catalysis, resulting in higher photocatalytic performance by TiO2 paper than by TiO2 powder and a pulp/TiO2 mixture not in paper form. 相似文献
105.
Gayan Lakendra Gunaratne Norio Tanaka G. P. Amarasekara Tilak Priyadarshana Jagath Manatunge 《Journal of Coastal Conservation》2011,15(1):113-121
Physical processes of the lagoon are influenced by structural interventions. Understanding the complex reality of physical
processes sometimes difficult with field observations thus a model provides a simplified abstract view. Two dimensional hydrodynamic
model is used to describe, restoration efforts to Koggala lagoon, a combined freshwater and estuarine complex of rich ecosystem
on the southern coast of Sri Lanka. The lagoon mouth was naturally closed by a sand bar which controlled the seawater intrusion.
Due to large-scale sand removal at lagoon mouth, formation of the sandbar shifted towards the lagoon. After the removal of
natural sand barrier, rubble mound groyne structures were built to avoid sand deposition in the lagoon and to protect the
highway bridge from the sea wave attack. Construction of the groyne resulted in the lagoon mouth being permanently open which
in turn led to many environmental problems with saline intrusion. The aim of this study is to evaluate the current situation
of the lagoon and propose alternative structural interventions for minimization of seawater intrusion and subsequently improve
lagoon ecosystem. Hydrological parameters were investigated and mathematical models for hydrodynamic behavior of the lagoon
were applied in order to describe the lagoon physical processes and flow characteristics. Existing rubble mound structures
were redesigned in order to minimize the seawater intrusion. Numerical simulations were carried out for two different mouth
widths (40 m and 20 m) with appropriate structural interventions. Existing salting factor for the lagoon is 0.68 and numerical
simulation results showed salting factor for 40 m and 20 m openings are 0.61 and 0.54 respectively. This shows the mouth width
can be reduced up to 20 m in order to obtain a slating factor close to 0.5, which indicates the predominant influence of fresh
water which in turn leads lagoon to a fresh water ecosystem. 相似文献
106.
107.
Toyoshi Yoshiga Yuji Ishikawa Ryusei Tanaka Mantaro Hironaka Etsuko Okumura 《Die Naturwissenschaften》2013,100(2):205-208
Caenorhabditis japonica is a bacteriophagous nematode species that was discovered on the semi-social burrower bug, Parastrachia japonensis, which demonstrates egg-guarding and provisioning behaviors. To understand the life history of C. japonica in relation to P. japonensis, we demonstrated the specificity of this association and fluctuations in nematode number on the insect throughout the year. C. japonica dauer larvae (DL), larvae in a nonfeeding diapause stage, were predominantly found as clumps on the adult female insects but rarely found on the male insects in all populations examined. This female-biased association was consistent throughout the year, but after the nymphs hatched, nematodes were not detected on the mother insects showing provisioning behavior. DL appeared on the nymphs, and the number of DL on the newly emerged female insects gradually increased thereafter. C. japonica has never been detected on other invertebrates collected from the P. japonensis habitat thus far. Our data suggest that the life cycles of C. japonica and P. japonensis are synchronized. 相似文献
108.
Masaru Tanaka 《Journal of Material Cycles and Waste Management》1999,1(1):10-16
Japan's basic approach to municipal solid waste (MSW) is (1) waste reduction, (2) promotion of recycling, (3) volume reduction
by intermediate treatment, and (4) environmentally sound final disposal. A brief history of legislative trends in waste management
is given as background for current waste management and recycling activities. The material recovery rate for MSW collected
by local municipalities was only 5.6% in 1996. More than half of MSW, on a volume basis, consists of containers and packages,
while great amounts of landfill space are also taken up by bulky wastes such as electric appliances. Therefore, in order to
promote recycling and decrease landfill waste, Japan is targeting containers, packages, and electric appliances. A law promoting
separate collection and recycling of containers and packages (Packaging Waste Recycling Law) and a law requiring the recycling
of specific home electric appliances into new products (Home Electric Appliance Recycling Law) were introduced in June 1995
and June 1998, respectively. These laws are in line with the OECD policy Extended Producer Responsibility (EPR).
Received: September 16, 1998 / Accepted: March 10, 1999 相似文献
109.
Perfluorooctanesulfonate and perfluorooctanoate in raw and treated tap water from Osaka, Japan 总被引:7,自引:0,他引:7
Takagi S Adachi F Miyano K Koizumi Y Tanaka H Mimura M Watanabe I Tanabe S Kannan K 《Chemosphere》2008,72(10):1409-1412
Perfluorooctanesulfonate (PFOS) and perfluorooctanoate (PFOA) have been recognized as emerging environmental pollutants because of their ubiquitous occurrence in the environment, biota, and humans. PFOS and PFOA have been detected in water in Japan. Nevertheless, occurrence of PFOS and PFOA in potable water from municipal water treatment plants is not clearly known. We analyzed PFOS and PFOA in raw and tap water samples collected from 14 drinking water treatment plants in winter and summer seasons in Osaka to determine the concentrations of PFOS and PFOA in raw and potable tap water samples. PFOS and PFOA were detected in all raw water samples. Concentration ranges of PFOS and PFOA in raw water were 0.26-22 ng/l and 5.2-92 ng/l, respectively. Whereas the concentrations PFOS in raw water from Osaka were similar to those in other areas in Japan, the concentrations of PFOA were higher than in other areas. Concentration ranges of PFOS and PFOA in potable tap water were 0.16-22 ng/l and 2.3-84 ng/l, respectively. There were positive correlations between PFC concentrations in raw water and tap water samples. Therefore, the removal efficiency of PFCs by the present water treatment may be low. Based on the current action value reported by U.S. Environmental Protection Agency, PFOA concentrations found in tap water in Osaka is not expected to pose health risks. 相似文献
110.
Okamoto Taka-aki Tanaka Kenta Matsumoto Kazumasa Someya Tomohiro 《Environmental Fluid Mechanics》2021,21(3):693-711
Environmental Fluid Mechanics - Transport of driftwood during heavy rainfall events can intensify the flood hazard. Driftwood accumulates at a bridge and backwater rises. Accumulated logs sink... 相似文献