全文获取类型
收费全文 | 73篇 |
免费 | 0篇 |
国内免费 | 3篇 |
专业分类
安全科学 | 3篇 |
废物处理 | 14篇 |
环保管理 | 3篇 |
综合类 | 10篇 |
基础理论 | 9篇 |
污染及防治 | 29篇 |
社会与环境 | 8篇 |
出版年
2022年 | 1篇 |
2021年 | 1篇 |
2019年 | 1篇 |
2018年 | 3篇 |
2017年 | 1篇 |
2016年 | 3篇 |
2014年 | 2篇 |
2013年 | 6篇 |
2012年 | 3篇 |
2011年 | 8篇 |
2010年 | 4篇 |
2009年 | 3篇 |
2008年 | 5篇 |
2007年 | 5篇 |
2006年 | 7篇 |
2005年 | 1篇 |
2004年 | 3篇 |
2003年 | 3篇 |
2002年 | 4篇 |
2001年 | 3篇 |
2000年 | 2篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1995年 | 1篇 |
1984年 | 2篇 |
排序方式: 共有76条查询结果,搜索用时 31 毫秒
21.
T. Matsuda M. Yashima M. Nifuku H. Enomoto 《Journal of Loss Prevention in the Process Industries》2001,14(6):449-453
The dust explosion committee of the Association of Powder Process Industry and Engineering, Japan recently established two testing standards for dust explosions. In the investigations for the standardization, many experimental data have been obtained for the dusts currently used in Japanese industries. Data for zirconium, tantalum and silicone dusts are presented to discuss the use of test methods, which have been accepted internationally. The test methods for dust explosions have to consider a variety of kinds and forms of dusts to be tested. 相似文献
22.
Application of an ELISA for PCB 118 to the screening of dioxin-like PCBs in retail fish 总被引:1,自引:0,他引:1
Tsutsumi T Amakura Y Okuyama A Tanioka Y Sakata K Sasaki K Maitani T 《Chemosphere》2006,65(3):467-473
A commercially available enzyme-linked immunosorbent assay (ELISA) kit was evaluated for the determination of toxic equivalents (TEQs) of dioxin-like polychlorinated biphenyls (PCBs) in retail fish. The ELISA was highly specific for 2,3',4,4',5-pentachlorobiphenyl (PCB 118), which is generally the most abundant dioxin-like PCB isomer found in fish. The quantitative limit of the ELISA (using 3,3',4'-trichloro-4-methoxybiphenyl as a surrogate standard for PCB 118) was 10 ng ml(-1) (125 pg assay(-1)) in the standard curve, corresponding to 50 pg PCB 118 g(-1) in the tested sample. Good recoveries of PCB 118 (78.7-112.3%) were obtained for spiked purified fish extracts according to the ELISA. Good linearity was also obtained in dilution tests using purified fish extracts. No significant interference of the matrix was observed in the ELISA when this purification procedure was used. Recovery tests in which PCB 118 was added to fish samples also resulted in acceptable recoveries (60.2-82.3%) in the ELISA following purification. The ELISA results for fish samples correlated well with the TEQ concentrations of dioxin-like PCBs obtained by high-resolution gas chromatography/high-resolution mass spectrometry (r = 0.92, n = 26). These data indicate that the ELISA kit is suitable for screening retail fish for the TEQs of dioxin-like PCBs. 相似文献
23.
Phosphate removal is important to control eutrophication and an ion exchange process is one of several treatment processes for this purpose. Hydrotalcite compounds (HTALs) are useful as adsorbents for phosphate removal because of their ion exchange properties. In this study, the adsorption properties of a granular synthetic HTAL for phosphate and the method of regeneration of the granular HTAL were examined. The adsorption isotherm of the granular HTAL was approximated by a modified Langmuir type, and the maximum adsorption capacity was 47.3 mg P g(-1), which corresponded to the content of HTAL in the granular one. Phosphate adsorbed on the HTAL was effectively desorbed with alkaline NaCl solutions and the HTAL was regenerated with 25 w/v% MgCl(2) solution. The regenerated HTAL could be reused repeatedly for the phosphate removal. Phosphate in the exhausted desorption solution was recovered as a precipitate of calcium phosphate by addition of CaCl(2), and the residual exhausted desorption solution could be also reused after supplying NaOH. The results suggest the possibility of an effective system for phosphate removal and recovery, which includes the following processes: adsorption, desorption, recovery of phosphate, and regeneration of the HTAL and the desorption solution. 相似文献
24.
Problems and constraints in Philippine municipal fisheries: The case of San Miguel Bay,Camarines Sur
The Philippine fisheries accounted for 3.7% of the gross national product at current prices. The sector employed about 990,872
persons. Of the divisions comprising the industry, municipal fisheries continued to contribute the largest share of fish production.
However, the sector is beset with problems, many of which are best examplified by the case of San Miguel Bay (SMB). This paper
presents the problems and constraints confronting SMB, a common property resource. This bay's open access condition has led
to various problems, such as declining fishery resources, depressed socioeconomic conditions, illegal fishing, increasing
population, and conflict among resource users. A poor marketing system, low level of fishing technology, fishermen's noncompliance
and authorities' lax enforcement of rules and regulations, as well as lack of alternative sources of income further characterize
the condition in SMB. Establishment of fishing rights, improvement of the marketing system, provision of alternative sources
of income, and improvement of fishing technology were some of the solutions suggested. One major constraint, however, is financial,
Comanagement complemented with other management tools has been proposed in addressing the problems in SMB. 相似文献
25.
Angela F. McGaffin Stephen Nicol Patti Virtue Yasuo Hirano Tsuyoshi Matsuda Itaru Uchida Steven G. Candy So Kawaguchi 《Marine Biology》2011,158(8):1743-1755
Antarctic krill, Euphausia superba, hatched from eggs and maintained for four years, were sampled periodically for age-pigment analysis. Extractable pigments
from the eye and eyestalk ganglia were quantified using fluorescence intensity and standardised against protein. Three peak
fluorescence intensities were detected at wavelengths of excitation 280 nm, emission 625 nm (pigment 1); excitation 355 nm,
emission 510 nm (pigment 2); and excitation 463 nm, emission 620 nm (pigment 3). There was a positive correlation between
the quantity of pigments 1 and 3 and the age of Antarctic krill. A model was developed to predict age from pigment 3 and to
compare it with other age proxies (carapace length and eyeball diameter). The quantity of pigment 3 was the best predictor
of age. The pigment method can discriminate between similar sized krill aged 12 and 36 months. Age pigments provide an improved
tool for age estimation in Antarctic krill, particularly if used in conjunction with other demographic information. 相似文献
26.
Jun Shishido Keiko Yoshii Yoshihiro Takubo Yoshiaki Okamoto Takeshi Yamamoto Yoshiko Kato Tsutomu Nishihara Masaomi Kondo 《Chemosphere》1984,13(2):339-349
An automated survey system on the chemicals in environments by a gas chromatography-mass spectrometry-computer system has been constructed of Three Dimensional Mass Chromatography, Modified Probability Based Matching method, and Self Training Interpretive and Retrieval method. And it was applied to analyze environmental materials, with interesting results. 相似文献
27.
Virgin female cabbage butterflies, Pieris rapae crucivora, accept and mate with courting males, whereas mated females reject them and assume the “mate refusal posture”. This study
tested whether the biogenic amines, serotonin (5HT), dopamine (DA), and octopamine (OA), were responsible for this change
in behavior. The results showed that 2–3-day-old virgin females fed with 5HT rejected courting males significantly more frequently
compared with controls fed on sucrose. In contrast, the proportions of courting males rejected by virgin females fed with
either DA or OA did not differ from sucrose-fed controls. Oral application of each amine resulted in significantly increased
levels of the amine applied (or its metabolite) in the brain. The results strongly suggest that 5HT or a 5HT metabolite may
be responsible for the post-mating change in behavioral response of 2–3-day-old virgin females to courting males. Similar
effects of 5HT treatment were observed in 6–8-day-old virgin females, but in this case the results were only marginally different
from the controls, suggesting that the effect may decline with increasing female age. 相似文献
28.
Ou-Sup Han Masaaki Yashima Toei Matsuda Hidenori Matsui Atsumi Miyake Terushige Ogawa 《Journal of Loss Prevention in the Process Industries》2000,13(6):449-457
The structure of flame propagating through lycopodium dust clouds has been investigated experimentally. Upward propagating laminar flames in a vertical duct of 1800 mm height and 150×150 mm square cross-section are observed, and the leading flame front is also visualized using by a high-speed video camera. Although the dust concentration decreases slightly along the height of duct, the leading flame edge propagates upwards at a constant velocity. The maximum upward propagating velocity is 0.50 m/s at a dust concentration of 170 g/m3. Behind the upward propagating flame, some downward propagating flames are also observed. Despite the employment of nearly equal sized particles and its good dispersability and flowability, the reaction zone in lycopodium particles cloud shows the double flame structure in which isolated individual burning particles (0.5–1.0 mm in diameter) and the ball-shaped flames (2–4 mm in diameter; the combustion time of 4–6 ms) surrounding several particles are included. The ball-shaped flame appears as a faint flame in which several luminous spots are distributed, and then it turns into a luminous flame before disappearance. In order to distinguish these ball-shaped flames from others with some exceptions for merged flames, they are defined as independent flames in this study. The flame thickness in a lycopodium dust flame is observed to be 20 mm, about several orders of magnitude higher than that of a premixed gaseous flame. From the microscopic visualization, it was found that the flame front propagating through lycopodium particles is discontinuous and not smooth. 相似文献
29.
Koji Yachiguchi Noriko Matsumoto Yuki Haga Motoharu Suzuki Chisato Matsumura Masahiro Tsurukawa Toshihiro Okuno Takeshi Nakano Kimi Kawabe Kei-ichiro Kitamura Akira Toriba Kazuichi Hayakawa Vishwajit S. Chowdhury Masato Endo Atsuhiko Chiba Toshio Sekiguchi Masaki Nakano Yoshiaki Tabuchi Takashi Kondo Shigehito Wada Hiroyuki Mishima Atsuhiko Hattori Nobuo Suzuki 《Environmental science and pollution research international》2014,21(10):6365-6372
To analyze the effect of polychlorinated biphenyl (PCB) 118 on fish bone metabolism, we examined osteoclastic and osteoblastic activities, as well as plasma calcium levels, in the scales of PCB (118)-injected goldfish. In addition, effect of PCB (118) on osteoclasts and osteoblasts was investigated in vitro. Immature goldfish, in which the endogenous effects of sex steroids are negligible, were used. PCB (118) was solubilized in dimethyl sulfoxide at a concentration of 10 ppm. At 1 and 2 days after PCB (118) injection (100 ng/g body weight), both osteoclastic and osteoblastic activities, and plasma calcium levels were measured. In an in vitro study, then, both osteoclastic and osteoblastic activities as well as each marker mRNA expression were examined. At 2 days, scale osteoclastic activity in PCB (118)-injected goldfish increased significantly, while osteoblastic activity did not change significantly. Corresponding to osteoclastic activity, plasma calcium levels increased significantly at 2 days after PCB (118) administration. Osteoclastic activation also occurred in the marker enzyme activities and mRNA expressions in vitro. Thus, we conclude that PCB (118) disrupts bone metabolism in goldfish both in vivo and in vitro experiments. 相似文献
30.