全文获取类型
收费全文 | 73篇 |
免费 | 0篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 1篇 |
废物处理 | 5篇 |
环保管理 | 15篇 |
综合类 | 29篇 |
基础理论 | 3篇 |
污染及防治 | 15篇 |
评价与监测 | 2篇 |
社会与环境 | 2篇 |
灾害及防治 | 2篇 |
出版年
2017年 | 1篇 |
2014年 | 1篇 |
2013年 | 5篇 |
2011年 | 2篇 |
2010年 | 3篇 |
2009年 | 2篇 |
2008年 | 5篇 |
2007年 | 3篇 |
2005年 | 3篇 |
2004年 | 2篇 |
2003年 | 3篇 |
2001年 | 3篇 |
2000年 | 2篇 |
1997年 | 1篇 |
1989年 | 1篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1981年 | 4篇 |
1980年 | 2篇 |
1979年 | 4篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1967年 | 1篇 |
1966年 | 1篇 |
1965年 | 1篇 |
1958年 | 3篇 |
1957年 | 1篇 |
1956年 | 4篇 |
1955年 | 3篇 |
1954年 | 1篇 |
1950年 | 1篇 |
1946年 | 1篇 |
1943年 | 1篇 |
1939年 | 1篇 |
1927年 | 1篇 |
1916年 | 1篇 |
排序方式: 共有74条查询结果,搜索用时 984 毫秒
31.
32.
Schaub M Skelly JM Steiner KC Davis DD Pennypacker SP Zhang J Ferdinand JA Savage JE Stevenson RE 《Environmental pollution (Barking, Essex : 1987)》2003,124(2):307-320
Sixteen black cherry (Prunus serotina, Ehrh.), 10 white ash (Fraxinus americana, L.) and 10 red maple (Acer rubrum, L.) 1-year old seedlings were planted per plot in 1997 on a former nursery bed within 12 open-top chambers and six open plots. Seedlings were exposed to three different ozone scenarios (ambient air: 100% O3; non-filtered air: 98% ambient O3; charcoal-filtered air: 50% ambient O3) within each of two different water regimes (nine plots irrigated, nine plots non-irrigated) during three growing seasons.During the 1998 and 1999 growing season, leaf gas exchange, plant water relations, and foliar injury were measured. Climatic data,ambient- and chamber-ozone-concentrations were monitored. We found that seedlings grown under irrigated conditions had similar (in 1998) but significantly higher gas exchange rates (in 1999) than seedlings grown within non-irrigated plots among similar ozone exposures. Cherry and ash had similar ozone uptake but cherry developed more ozone-induced injury (< 34% affected leaf area, LAA) than ash (<5% LAA), while maple rarely showed foliar injury, indicating the species differed in ozone sensitivity. Significantly more severe injury on seedlings grown under irrigated conditions than seedlings grown under non-irrigated conditions demonstrated that soil moisture altered seedling responses to ambient ozone exposures. 相似文献
33.
34.
35.
Shohichi Osada Dalibor Kuchar Hitoki Matsuda 《Journal of Material Cycles and Waste Management》2010,12(1):83-92
To study the volatilization and condensation behaviors of low-boiling-point elements in the waste melting process, experiments
were conducted to collect the dust from a coke-type incineration residue melting furnace. Then, a comparison was made between
the experimental results and the calculated values obtained from a thermodynamic equilibrium model in terms of the chemical
composition of the dust. The composition of the dust collected from a cylindrical filter in the exhaust gas duct was determined
by chemical methods, scanning electron microscopy/energy-dispersive X-ray spectroscopy, and X-ray analysis. As a result, the
sampled dust was classified into two different types: fine particles mainly containing Na, K, Pb, and Zn collected from the
side face of the cylindrical filter, and large particles containing Ca, Si, and Al collected from the bottom face of the cylindrical
filter. From X-ray analysis of the sampled dust, NaCl, KCl, PbS, and ZnS were identified in the fine-particle dust, while
CaO, SiO2, Al2O3 were detected in the large-particle dust. From the results of the thermodynamic equilibrium calculation in the gas cooling
process from 2000 to 600 K, it was found that Na, K, Pb, and Zn volatilized as metals in the melting furnace were condensed
as alkali chlorides such as NaCl and KCl and heavy metal sulfides such as PbS and ZnS. These computational results were in
good agreement with the X-ray diffraction results of the sampled dust at a gas temperature of 823 K for the formation of NaCl,
KCl, PbS, and ZnS. 相似文献
36.
Maternal uniparental disomy (UPD) 20 was found in a 35-month-old girl, the product of a pregnancy complicated by a prenatal diagnosis of mosaic trisomy 20. Phenotypic abnormalities included pre- and postnatal growth failure, microcephaly, minor dysmorphic features and psychomotor developmental delay. Chromosomal analysis on cord blood revealed only a normal 46,XX karyotype. Microsatellite analysis of 27 chromosome 20 loci confirmed maternal UPD for all 11 informative markers. Maternal heterodisomy was detected in two and maternal isodisomy in three loci. In the remaining six loci, a non-informative maternal UPD pattern was displayed, as mother and proband are homozygous for the same allele. To our knowledge this is the first reported case of maternal disomy 20 with normal karyotype ascertained by a mosaic trisomy 20 pregnancy. Copyright © 2001 John Wiley & Sons, Ltd. 相似文献
37.
Ferdinand Dhombres Kamila Kolanska Catherine Garel Jean-Pierre Aubry Marie Gonzales Jean-Marie Jouannic 《黑龙江环境通报》2013,33(13):1305-1307
Nevus sebaceous is a complex hamartoma most commonly found on the scalp, face, and neck and is often present at birth, although some may be diagnosed later in infancy. We report the first prenatal diagnosis of isolated nevus sebaceous that presented at 19 weeks' gestation as a large and exophytic tumor of the scalp. This case emphasizes the crucial role of ultrasound examination performed with high-frequency probes, which revealed associated diffuse lesions of the face. Identification of such a facial involvement could have a dramatic prognostic impact. © 2013 John Wiley & Sons, Ltd. 相似文献
38.
Results of the assessment of enrichment, accumulation and the ecological risk associated with three heavy metals (Cd, Cu and Pb) and one metalloid (As) in surface sediments of Msimbazi estuary are presented. Surface sediment samples (0–5 cm) were collected from Msimbazi River estuary in September 2016 using handheld PVC short corers. Long-sediment cores from the site were also collected using PVC pipes and their vertical profiles of metals concentrations assessed with the aim of establishing site-specific baseline metals concentrations. The established site-specific baseline values were used for the determination of normalised enrichment factors (EF) and geoaccumulation (Igeo) of metals instead of using average crustal values. Iron-based enrichment factors show that the sediments of Msimbazi have experienced enrichment of metals that originate from anthropogenic sources of pollution (EF > 1). Geo-accumulation results indicate that Msimbazi sediments can be designated as uncontaminated to moderately-contaminated with As, Cd and Pb (class 1–2). Geoaccumulation indices for Cu indicate that sediment can be designated as uncontaminated to moderately contaminated (class 1) and moderately to strongly contaminated (class 3). Results show further that the Ecological Risk associated with the accumulation of these metals in Msimbazi sediments was low based on Hakanson approach. 相似文献
39.
40.