全文获取类型
收费全文 | 132篇 |
免费 | 1篇 |
国内免费 | 2篇 |
专业分类
安全科学 | 4篇 |
废物处理 | 4篇 |
环保管理 | 13篇 |
综合类 | 17篇 |
基础理论 | 26篇 |
污染及防治 | 34篇 |
评价与监测 | 25篇 |
社会与环境 | 11篇 |
灾害及防治 | 1篇 |
出版年
2023年 | 3篇 |
2022年 | 6篇 |
2021年 | 8篇 |
2020年 | 1篇 |
2019年 | 3篇 |
2018年 | 9篇 |
2017年 | 3篇 |
2016年 | 10篇 |
2015年 | 5篇 |
2014年 | 2篇 |
2013年 | 12篇 |
2012年 | 4篇 |
2011年 | 5篇 |
2010年 | 11篇 |
2009年 | 11篇 |
2008年 | 4篇 |
2007年 | 6篇 |
2006年 | 8篇 |
2005年 | 3篇 |
2004年 | 2篇 |
2003年 | 8篇 |
2002年 | 4篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1984年 | 1篇 |
排序方式: 共有135条查询结果,搜索用时 31 毫秒
51.
52.
Michalis Leotsinidis Vassilios Schinas Athanasios Alexopoulos Panagiotis Zannis Williams Burgess Xenofon Gerasimos Kondakis 《毒物与环境化学》2013,95(1-2):113-126
Sludge resulting from industrial waste water treatment at the industrial area of Patras, Greece, was spiked with cadmium, chromium and lead and entrenched in 4 experimental trenches. Soil from the unsaturated zone and sludge from the trenches were sampled at successive time points over a period of 14 months to monitor the movement of metals. Results showed that 94% of cadmium and 80% of lead but only 32% of chromium migrated from the sludge just 14 months after the entrenchment. At the end of this time the buried sludge could be considered stabilised, as indicated by the total nitrogen content. Cd content in underlying soil layers at 3 m depth showed an increase in the first 7 months followed by a decrease, afterwards. Soil Pb concentration at 3 and 6 m depth was significantly high, in relation to it's initial concentration 14 months after the entrenchment. Pb and Cd in the soil samples were negatively correlated. It is suggested that lead displaces cadmium in the sediments. 相似文献
53.
Predictions of short and long term changes in Sepia officinalis metabolism are useful, since this species is both economically important for aquaculture and also is an ideal experimental
laboratory organism. In this study standard and routine oxygen consumption rates of newly hatched and juvenile laboratory
raised cuttlefish S. officinalis ranging between 0.04 and 18.48 g dry body mass (Dm), were measured over a range of temperatures (10, 15, 20 and 25°C). The
mass exponent (b) ranged between 0.706 and 0.992 for standard oxygen consumption and between 0.694 and 0.990 for routine oxygen consumption.
Oxygen consumption scaled allometrically (b = 0.7) with body mass for cuttlefish <2 g Dm and isometrically (b = 1) thereafter. No significant differences were apparent amongst the slopes of oxygen consumption and body mass at different
temperatures for standard and routine oxygen consumption. However, the intercepts differed significantly amongst the regression
lines, indicating a significant effect of temperature on the magnitude of oxygen consumption. The combined effect of temperature
(T) and dry body mass (Dm) are best described by the following equations: cuttlefish <2 g, MO2 = 0.116Dm0.7111.086
T
and >2 g, MO2 = 0.076Dm0.9831.091
T
for standard oxygen consumption; cuttlefish <2 g, MO2 = 0.538Dm0.7291.057
T
and >2 g, MO2 = 0.225Dm0.9621.081
T
for routine oxygen consumption. Using these equations it was estimated that a cuttlefish of 1 g Dm held at 20°C, eating 5%
Dm day−1 and undergoing standard and routine metabolism consumes 21.3 and 35.4%, respectively of its total daily energy intake. Juvenile
cuttlefish (3.32–5.08 g Dm) held at 15°C and deprived of food for 27 days maintained a stable standard oxygen consumption
rate for the first 6 days following starvation. By the 18th day without food, oxygen consumption rate had declined by 53%
and further declined to 65% below the standard oxygen consumption rate on the 27th day. Upon resumption of feeding, the respiration
rate returned immediately to the initial level prior to food deprivation. The present study defines the basic energy requirements
and general physiological state of young cuttlefish at temperatures of 10–25°C with and without food. 相似文献
54.
Anastasios N. Georgoulas Panagiotis B. Angelidis Theologos G. Panagiotidis Nikolaos E. Kotsovinos 《Environmental Fluid Mechanics》2010,10(6):603-635
During floods, the density of river water usually increases due to a subsequent increase in the concentration of the suspended
sediment that the river carries, causing the river to plunge underneath the free surface of a receiving water basin and form
a turbidity current that continues to flow along the bottom. The study and understanding of such complex phenomena is of great
importance, as they constitute one of the major mechanisms for suspended sediment transport from rivers into oceans, lakes
or reservoirs. Unlike most of the previous numerical investigations on turbidity currents, in this paper, a 3D numerical model
that simulates the dynamics and flow structure of turbidity currents, through a multiphase flow approach is proposed, using
the commercial CFD code FLUENT. A series of numerical simulations that reproduce particular published laboratory flows are
presented. The detailed qualitative and quantitative comparison of numerical with laboratory results indicates that apart
from the global flow structure, the proposed numerical approach efficiently predicts various important aspects of turbidity
current flows, such as the effect of suspended sediment mixture composition in the temporal and spatial evolution of the simulated
currents, the interaction of turbidity currents with loose sediment bottom layers and the formation of internal hydraulic
jumps. Furthermore, various extreme cases among the numerical runs considered are further analyzed, in order to identify the
importance of various controlling flow parameters. 相似文献
55.
Yvoni Koumantaki Stavros Sifakis Georgios Dragatis Ioannis Matalliotakis Georgios Froudarakis Eleftheria Papadopoulou Eugenios Koumantakis 《黑龙江环境通报》2001,21(7):566-570
Fetal trophoblasts can be found in maternal circulation from an early stage of pregnancy and thus provide a potential source of DNA for non-invasive prenatal diagnosis. We have developed a two-step method for trophoblast isolation between the 8th and 12th week of pregnancy. Blood was sampled from 14 women undergoing termination of pregnancy or spontaneous abortion. Immunomagnetic beads precoated with HLA class I and II, and with anti-cytokeratin-18 monoclonal antibodies, were used to remove CD8+ and other maternal cells, and to select for fetal trophoblasts, respectively. Microsatellite analysis was performed on DNA extracted from the isolated, maternal, paternal and placental cells after PCR amplification. Recovery of the trophoblasts was confirmed in 13/14 cases (93%) by the identification of an identical microsatellite pattern for fetal and placental cells. Further evidence was the presence of heterozygous alleles of both maternal and paternal origin. The correct prediction of gender in all five male fetuses was an additional confirmation of trophoblast recovery. We conclude that trophoblasts can be effectively isolated from maternal blood in the first trimester, and by using polymorphic microsatellite markers to confirm sample purity, this method has potential future application in prenatal diagnosis. Copyright © 2001 John Wiley & Sons, Ltd. 相似文献
56.
Panagiotis Elefsiniotis David G Wareham Marcus O Smith 《Water environment research》2005,77(4):366-371
This research investigated the effect of varying the starch-rich, industrial-wastewater component of mixtures with municipal wastewater fed to an anaerobic digester. A laboratory-scale, completely-mixed anaerobic digester was operated at an HRT of 30 h, an SRT of 10 d, and an ambient temperature of 21.5 +/- 1.5 degrees C. The industrial-to-municipal ratios tested were 1:3, 1:1, 3:1, and 100% industrial by volume. Steady-state, acidogenic conditions were achieved for all runs, except 100% industrial. The pH was observed to drop substantially as the industrial constituent of the feed increased. Net volatile fatty acids (VFA) production reached a plateau of approximately 800 mg/L at ratios of 1:1 and higher, while volatile suspended solids (VSS) reduction steadily increased as the industrial component rose. The specific VFA and soluble chemical oxygen demand (SCOD) production rates leveled off at approximately 0.070 mgVFA/ mgVSS.d and 0.124 mgSCOD/mgVSS.d, respectively, for all the mixtures investigated, except for 100% industrial. In this latter case, both rates dropped dramatically. Finally, acetic and propionic acid concentrations fell as the industrial proportion of the mixture increased. This was compensated by a rise in butyric acid production. 相似文献
57.
Papazotos Panagiotis 《Environmental science and pollution research international》2021,28(35):47825-47837
Environmental Science and Pollution Research - A scientometric analysis based on the Scopus database was conducted to provide insight into research activities on the occurrence of potentially toxic... 相似文献
58.
Mazis Anastasios Litskas Vassilis D. Platis Dimitrios P. Menexes Georgios C. Anagnostopoulos Christos D. Tsaboula Aggeliki D. Mamolos Andreas P. Kalburtji Kiriaki L. 《Environmental science and pollution research international》2021,28(23):29421-29431
Environmental Science and Pollution Research - The development of agriculture is linked to energy resources. Consequently, energy analysis in agroecosystems could be a useful tool for monitoring... 相似文献
59.
60.