全文获取类型
收费全文 | 247篇 |
免费 | 1篇 |
国内免费 | 10篇 |
专业分类
安全科学 | 11篇 |
废物处理 | 45篇 |
环保管理 | 11篇 |
综合类 | 40篇 |
基础理论 | 32篇 |
污染及防治 | 93篇 |
评价与监测 | 9篇 |
社会与环境 | 16篇 |
灾害及防治 | 1篇 |
出版年
2023年 | 2篇 |
2022年 | 5篇 |
2021年 | 5篇 |
2020年 | 1篇 |
2019年 | 3篇 |
2018年 | 6篇 |
2017年 | 5篇 |
2016年 | 8篇 |
2015年 | 5篇 |
2014年 | 3篇 |
2013年 | 19篇 |
2012年 | 10篇 |
2011年 | 15篇 |
2010年 | 17篇 |
2009年 | 18篇 |
2008年 | 21篇 |
2007年 | 23篇 |
2006年 | 13篇 |
2005年 | 9篇 |
2004年 | 19篇 |
2003年 | 7篇 |
2002年 | 14篇 |
2001年 | 4篇 |
2000年 | 4篇 |
1999年 | 3篇 |
1997年 | 3篇 |
1996年 | 1篇 |
1994年 | 2篇 |
1992年 | 3篇 |
1989年 | 1篇 |
1984年 | 1篇 |
1982年 | 1篇 |
1979年 | 2篇 |
1977年 | 2篇 |
1969年 | 1篇 |
1957年 | 1篇 |
1956年 | 1篇 |
排序方式: 共有258条查询结果,搜索用时 15 毫秒
151.
BACKGROUND: The relation between the levels of dioxins in human breast milk and the smoking habits of the mothers is controversial. To clarify this relationship, we analyzed data from the human milk survey in Japan. METHODS: The human milk survey has been conducted in Japan since 1997. Healthy pregnant women aged 20-39 years were recruited and 50 ml of breast milk was collected from them at 30 days after delivery. PCDDs, PCDFs, and dioxin-like PCBs were measured by using GC/MS. The smoking habits of the mothers were established by interviewing them soon after delivery and were classified into four categories: current smokers, ever smokers who quit smoking at the pregnancy, ever smokers who quit smoking before the pregnancy, and never smokers. The levels of dioxins in breast milk were compared in the four categories of smoking among 853 primiparas. In addition, we analyzed the association between dioxin levels and passive smoking among never smokers. The geometric means of the dioxin concentrations were calculated in order to compare the differences between dioxins. RESULTS: The geometric means of dioxin-like PCBs in milk of never smokers was the highest (9.2 pg TEQ/g fat); followed by ever smokers who quit smoking before the pregnancy, ever smokers who quit smoking at the pregnancy, and current smokers (7.5, 7.2, and 6.6 pg TEQ/g fat, respectively). The differences between these levels were statistically significant (ANOVA, p<0.001). No significant difference was observed between the level of dioxins in milk from never smokers subjected to passive smoking status and those who had not experienced passive smoking. CONCLUSION: The levels of dioxin-like PCBs in human milk were negatively related to the smoking habits of mothers. 相似文献
152.
Tsuyoshi Noma Katsuki Ide Jun Yoshikawa Kazutaka Kojo Hiroshi Matsui Ryo Nakajima Kiyoshi Imai 《Journal of Material Cycles and Waste Management》2012,14(3):153-161
To achieve both high-efficiency power generation and high detoxification performance, advanced-type waste power generation plants such as pyrolysis and gas reforming plants are suggested. Further surveys on actual operational data of these plants are required in terms of reliability of the system when it is introduced to waste disposal sites. To verify the technical effectiveness of advanced-type waste power generation using the pyrolysis and gas reforming method, we evaluated 10?tons/day of municipal solid wastes (MSW) treated in a demonstration plant. A demonstration test was conducted over 100?days including 35?consecutive days of operation treating MSWs. The test results show high recycling performance and harmless nature of the plant which proves it to be an excellent waste recycling system. Major test results are as follows: (1) stabilization of waste treatment is possible with the wastes of various qualities, (2) clean gas is produced from the waste whose energy recovery ratio is approximately 40?%. (3) 99.3?% weight % of dried waste are recovered as valuable materials such as clean gas, char and metal, (4) total amount of dioxin emission to the outside of the plant is very small, down to 0.0051–0.018?μg?TEQ per ton waste. 相似文献
153.
Yuki Kojima Koji Inazu Yoshiharu Hisamatsu Hiroshi Okochi Toshihide Baba Toshio Nagoya 《Atmospheric environment (Oxford, England : 1994)》2010,44(24):2873-2880
Temporal and spatial variations in concentrations of particle-associated polycyclic aromatic hydrocarbons (PAHs) and their nitrated and oxygenated derivatives (nitro-PAHs and oxy-PAHs) were investigated to assess the influence of secondary formation on atmospheric occurrences of oxy-PAHs associated with particulate matter in downtown Tokyo, Japan. The daily variation in concentration of 1,8-naphthalic anhydride (1,8-NA) in summer 2007 was similar to that for 2-nitrofluoranthene (2-NF), a representative secondary formed nitro-PAH, while the variation for benzanthrone (BA) was similar to PAHs. In addition, the concentrations of polycyclic aromatic compounds (PACs) associated with airborne particulate matter decreased in the order of PAHs > BA > 9-fluorenone (9-FO) or 9,10-anthraquinone (9,10-AQ) > 1,8-NA with an increase in distance from the roadside, whereas 2-NF was constant. These results suggest that a considerable fraction of some oxy-PAHs such as 1,8-NA associated with airborne particulate matter in downtown Tokyo originates from atmospheric secondary formation. 相似文献
154.
Chemical synthesis and physical properties of two mercapturic acids suggested as urinary metabolites of m- and p-xylenes ace described. These compounds may be used for the identification and quantivative determination by high-performance liquid chromatography of the corresponding mercapturic acids in urine. 相似文献
155.
Atsushi Terazono Yuichi Moriguchi Shin-ichi Sakai Hiroshi Takatsuki 《Journal of Material Cycles and Waste Management》2000,2(2):80-88
This study evaluated the environmental impacts of sprayed-on asbestos, which had been used as insulation material in buildings,
from multiple perspectives, mainly at the disposal stage. The health risks from asbestos emission and energy consumption were
estimated. Two disposal scenarios were assumed for the asbestos: melting for reduced-risk disposal and ordinary packaging/landfilling.
We estimated the asbestos emission and health risk in the case of packaging/landfilling, assuming uncontrolled management
of the landfill site. A difficulty with introducing health-risk concepts into life cycle assessment (LCA) is the pulse–flux
problem, which is discussed in the light of these estimations. In order to solve this problem, we proposed a method using
a conversion factor representing exposure-dose/emission, and showed that emission could be converted into health risk. We
also estimated the energy consumption for melting asbestos in the disposal stage, which can decrease the health risk. If we
consider the energy consumption for the life cycle of asbestos, only a little energy is required for melting, compared with
the large amount of energy saved in the use stage owing to the insulating effect of the asbestos. The trade-off relationship
between health risk and energy consumption for the disposal scenarios indicated the need for weighting methods to handle trade-offs
such as this.
Received: July 2, 1998 / Accepted: December 20, 1999 相似文献
156.
Biological aerosol particles are recently gaining increased attention, but global estimates of their emissions are unclear. Traditional organic tracers for biological particles have not been able to capture the diversity of biological sources such as residential wood burning. Here, we have analyzed protein content in air particulate matter over a year in a suburban area near Shibuya, in order to identify contributions from biological sources. Aerosols were separated into five size fractions using a high-volume cascade impactor. Amino acid profiles were obtained from acid hydrolysates by high-performance liquid chromatography and were subsequently used in a receptor model for source apportionment. Results show that protein content ranged from 0.5 to 2 % throughout the year in all size fractions. We observed contributions from seasonally variable emission sources such as pollen and fallen leaves in coarse particles, larger than 7 µm, at elevated concentrations during spring and winter. We also found contributions from pollen and fallen leaves in the smallest size fraction, lower than 1.1 µm, after spring. This finding indicates that sources are broken up to smaller particles in the urban environment. Overall, our findings demonstrate that protein content can be used as marker for biological aerosol particles, and that protein amino acid composition can distinguish multiple sources. 相似文献
157.
Kumagai Shogo Hirahashi Suguru Grause Guido Kameda Tomohito Toyoda Hiroshi Yoshioka Toshiaki 《Journal of Material Cycles and Waste Management》2018,20(1):439-449
Journal of Material Cycles and Waste Management - Polyvinyl chloride (PVC)-coated poly(ethylene terephthalate) (PET) woven fibers are one of the hardest-to-recycle polymeric materials. Herein we... 相似文献
158.
Hiroshi Takatsuki 《Waste management (New York, N.Y.)》2013,33(11):2145-2146
159.
This paper reports on the relationships between creative mental sets and rule-violating actions using questionnaires answered by 218 nursing workers. An exploratory factor analysis was conducted. The results revealed five factors of creative mental sets: curiosity, minutiae, inquiry, sensitivity, and courage. In addition, rule-violating actions were found to consist of three factors: violation of regulations, violation of local rules, and self-style. The results of multiple regression analyses showed a negative relation between curiosity and regular rule violation. Negative correlations were observed among minutiae, inquiry, and local rule violation. Furthermore, the mean score of local rule violation of a person who thinks that it is important for the work environment to offer high and excellent care is significantly higher than that of those who think that other environmental considerations are more important. The result elucidated the necessity of using workers’ heuristics in the process of improving safety rules as well as improving their acceptability to workers. This point is important and applicable not only in the field of patient safety management systems, but also in other fields. 相似文献
160.
Sonoko Dorothea Bellingrath-Kimura Ayaka Wenhong Kishimoto-Mo Noriko Oura Seiko Sekikawa Seichiro Yonemura Shigeto Sudo Atsushi Hayakawa Kazunori Minamikawa Yusuke Takata Hiroshi Hara 《Ambio》2015,44(1):55-66
The spatial variability of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) fluxes from forest soil with high nitrogen (N) deposition was investigated at a rolling hill region in Japan. Gas fluxes were measured on July 25th and December 5th, 2008 at 100 points within a 100 × 100 m grid. Slope direction and position influenced soil characteristics and site-specific emissions were found. The CO2 flux showed no topological difference in July, but was significantly lower in December for north-slope with coniferous trees. Spatial dependency of CH4 fluxes was stronger than that of CO2 or N2O and showed a significantly higher uptake in hill top, and emissions in the valley indicating strong influence of water status. N2O fluxes showed no spatial dependency and exhibited high hot spots at different topology in July and December. The high N deposition led to high N2O fluxes and emphasized the spatial variability. 相似文献