全文获取类型
收费全文 | 79篇 |
免费 | 0篇 |
国内免费 | 3篇 |
专业分类
安全科学 | 1篇 |
废物处理 | 9篇 |
环保管理 | 3篇 |
综合类 | 17篇 |
基础理论 | 18篇 |
环境理论 | 1篇 |
污染及防治 | 19篇 |
评价与监测 | 7篇 |
社会与环境 | 7篇 |
出版年
2022年 | 2篇 |
2021年 | 1篇 |
2018年 | 1篇 |
2016年 | 1篇 |
2015年 | 1篇 |
2014年 | 2篇 |
2013年 | 5篇 |
2012年 | 5篇 |
2011年 | 10篇 |
2010年 | 3篇 |
2009年 | 7篇 |
2008年 | 7篇 |
2007年 | 8篇 |
2006年 | 8篇 |
2005年 | 4篇 |
2003年 | 6篇 |
2002年 | 2篇 |
2000年 | 1篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1991年 | 1篇 |
1985年 | 1篇 |
1975年 | 1篇 |
排序方式: 共有82条查询结果,搜索用时 31 毫秒
1.
Jun Murotsuki MD Shigeki Uehara Kunihiro Okamura Akira Yajima Kazuhiro Murakami 《黑龙江环境通报》1994,14(7):637-639
A case of type III congenital cystic adenomatoid malformation of the lung was successfully diagnosed prenatally by fetal lung biopsy. We performed this procedure at 22 weeks of gestation, using a biopsy gun system under ultrasound guidance. The pregnancy was undisturbed by the procedure but as the condition was incompatible with life, an abortion was performed. The diagnosis was confirmed at post-mortem examination. Fetal lung biopsy appears to be a useful method for prenatal diagnosis of fetal lung disorders. 相似文献
2.
3.
Current status and research on E-waste issues in Asia 总被引:2,自引:1,他引:2
Atsushi Terazono Shinsuke Murakami Naoya Abe Bulent Inanc Yuichi Moriguchi Shin-ichi Sakai Michikazu Kojima Aya Yoshida Jinhui Li Jianxin Yang Ming H. Wong Amit Jain In-Suk Kim Genandrialine L. Peralta Chun-Chao Lin Thumrongrut Mungcharoen Eric Williams 《Journal of Material Cycles and Waste Management》2006,8(1):1-12
Rapid economic growth in Asia and the increasing transboundary movement of secondary resources will increasingly require both
3R endeavors (reduce, reuse, recycle) in each country and appropriate control of international material cycles. Recently,
managing electrical and electronic waste (E-waste) has become an important target for domestic and international material
cycles from the viewpoints of environmental preservation and resource utilization efficiency. To understand the current status
of E-waste issues in the context of international material cycles and to discuss the future tasks related to achieving 3R
in the region, we organized the National Institute for Environmental Studies (NIES) E-waste Workshop in December 2004. This
article reviews past studies on E-waste and briefly describes the topics presented and discussions held at the workshop. The
topics at the workshop included E-waste generation, recycling systems, international trade, and environmental impacts. In
addition, we discussed various issues such as terminology, current environmental concerns, and possible solutions. Transboundary
shipments of E-waste should be conducted taking into consideration the concept of sustainable development. The direction of
future research and possible collaborations are also discussed. 相似文献
4.
The present levels of anthropogenic radionuclides, 137Cs and (239,240)Pu, in surface waters of the Pacific are estimated using the HAM database, which is a comprehensive data set of 137Cs, (239,240)Pu and other anthropogenic radionuclides. The time-series data of surface 137Cs and (239,240)Pu suggests that surface 137Cs and (239,240)Pu concentrations in the Pacific since 1971 decrease exponentially in each sea area, although the temporal changes of surface 137Cs and (239,240)Pu differed between sea areas of the Pacific. The calculated 137Cs concentrations in the Pacific surface waters in 2000 are homogeneous in the Pacific, comparing with that in the 1960s and 1970s, although they are still high in the North Pacific and low in the South Pacific. The biogeochemical and physical processes are significant factors to control present levels of surface (239,240)Pu concentrations, which are high in the Subarctic and equatorial Pacific and low in the mid-latitude region of the eastern North Pacific. 相似文献
5.
We simulated the spatial distributions and the temporal variations of 137Cs and (239,240)Pu concentrations in the ocean by using the ocean general circulation model which was developed by National Center of Atmospheric Research. These nuclides are introduced into seawaters from global fallout due to atmospheric nuclear weapons tests. The distribution of radioactive deposition on the world ocean is estimated from global precipitation data and observed values of annual deposition of radionuclides at the Meteorological Research Institute in Japan and several observed points in New Zealand. Radionuclides from global fallout have been transported by advection, diffusion and scavenging, and this concentration reduces by radioactive decay in the ocean. We verified the results of the model calculations by comparing simulated values of 137Cs and (239,240)Pu in seawater with the observed values included in the Historical Artificial Radionuclides in the HAM database, which has been constructed by the Meteorological Research Institute. The vertical distributions of the calculated 137Cs concentrations were in good agreement and are in good agreement with the observed profiles in the 1960s up to 250 m, in the 1970s up to 500 m, in the 1980s up to 750 m and in the 1990s up to 750 m. However, the calculated 137Cs concentrations were underestimated compared with the observed 137Cs at the deeper layer. This may suggest other transport processes of 137Cs to deep waters. The horizontal distributions of 137Cs concentrations in surface water could be simulated. A numerical tracer release experiment was performed to explain the horizontal distribution pattern. A maximum (239,240)Pu concentration layer occurs at an intermediate depth for both observed and calculated values, which is formed by particle scavenging. The horizontal distributions of the calculated (239,240)Pu concentrations in surface water could be simulated by considering the scavenging effect. 相似文献
6.
To determine whether the appearance of a reproductively parasitic tactic varies, and how this variation affects territorial
males of the Lake Tanganyika cichlid fish Telmatochromis vittatus, we examined the reproductive ecology of territorial males in Mtondwe and compared it with that of a neighboring Wonzye population,
where nest density differs from that at Mtondwe. In Wonzye, with high nest density, male tactics change with their body size
from a territorial to a non-territorial parasitic tactic called piracy in which they conquer several nests defended by territorial
males and take over the nests while females are spawning. These “pirate” males could decrease the costs incurred by travelling
among nests by exclusively targeting aggregations of nests in close proximity while avoiding separate nests. Territorial males
in Wonzye sacrifice the potential higher attractiveness offered by large nests and instead compete for nests farther from
neighbors on which pirates less frequently intrude. In contrast, the Mtondwe population had lower nest density and piracy
was absent. Given that the success of piracy depends on the close proximity of nests, nest density is likely responsible for
the observed variation in the occurrence of piracy between the two populations. Furthermore, in Mtondwe, territorial males
competed for larger nests and were smaller than the territorial males in Wonzye. Thus, this lower nest density may free territorial
males from the selection pressures for increased size caused by both defense against nest piracy and the need to develop into
pirates as they grow. 相似文献
7.
Circling and linear flights of a hairstreak Chrysozephyrus smaragdinus were recorded in natural habitat with a high-speed video camera. Circling flight paths were resolved into rotation and shift
components; values on X- and Y-coordinates of the butterfly position were separately extracted against time and fitted with a regression line composed of
a sinusoidal curve and a linear line. From the obtained parameters, diameter, rotation number, and flight velocity were calculated.
Flapping movements were also analyzed. Two types of circling flights, horizontal and vertical, were discriminated. In both
flights, the rotation diameter was about 10 cm, rotation number of 3/s, flight velocity of 0.9 m/s, and wing-beat frequency
of 20/s. The coordination of paired butterflies in circling flight showed a higher correlation in the horizontal circling
flight. In the vertical circling flight, butterflies accelerated the downstroke speed of the wing in the ascending phase.
They flew about four times faster in linear flights than in circling flights due to the higher frequency of wing beats. 相似文献
8.
PCDDs, PCDFs, and coplanar PCBs in wild terrestrial mammals from Japan: congener specific accumulation and hepatic sequestration 总被引:1,自引:0,他引:1
Kunisue T Watanabe MX Iwata H Tsubota T Yamada F Yasuda M Tanabe S 《Environmental pollution (Barking, Essex : 1987)》2006,140(3):525-535
The present study determined the contamination levels and congener-specific accumulation features of dioxins and related compounds (DRCs) in wild terrestrial mammals such as large Japanese field mice (LJFM), lesser Japanese moles (LJMs), and raccoon dogs (RDs) collected from Kanto region in Japan during 2001. The toxic equivalent quantity (TEQ) levels in the carcasses or adipose tissues were in the order of RDs > or = LJMs > LJFM. Comparison of DRC congener profiles in the three species and principal component analysis (PCA) demonstrated a higher contribution of OCDD, T4CB77, and P5CB118 in LJMs. Analysis of liver-adipose distribution of DRC congeners in RDs showed that livers contained significantly higher TEQs than adipose tissues, indicating that liver is a depository organ and critical for determining the toxicokinetics of DRCs. As for most T4, P5, H6CDD/DFs and for P5CB126, H6CB169 and mono-ortho PCB congeners, their liver/adipose concentration ratios in RDs revealed a tendency to increase with hepatic TEQ levels, suggesting TEQ-dependent hepatic sequestration. 相似文献
9.
Estimating the generation of recycled metals from obsolete motorcycles in Vietnam for ELV management
Kurogi Daiki Kosai Shoki Murakami Genya Phong Lai Thai Quang Nguyen Duc Huy Tran Duc Luong Nguyen Yamasue Eiji 《Journal of Material Cycles and Waste Management》2021,23(4):1563-1575
Journal of Material Cycles and Waste Management - The demand for various modes of transportation has significantly increased around the world due to rapid urbanization, the increase in population,... 相似文献
10.
By means of scanning and transmission electron microscopy, the influence of the red tide species Chattonella antiqua was examined with respect to the surface ultrastructures of chloride cells of the yellowtail Seriola quinqueradiata. Conspicuous ultrastructural alterations occurred on the apical surface of these cells. The majority of chloride cells in the control gills showed an apical surface with numerous cellular extensions, while more than half the chloride cells affected by red tide organisms exhibited an apical surface with fewer and smaller extensions, a wrinkled apical surface, or a protruded apical surface. These ultrastructural alterations of chloride cell surface may be due to the partial disturbance of salinity by C. antiqua, and reflect the changes of the ion-transport function in yellowtail gills exposed to red tide water. 相似文献