全文获取类型
收费全文 | 162篇 |
免费 | 3篇 |
国内免费 | 4篇 |
专业分类
安全科学 | 8篇 |
废物处理 | 6篇 |
环保管理 | 11篇 |
综合类 | 38篇 |
基础理论 | 46篇 |
污染及防治 | 42篇 |
评价与监测 | 7篇 |
社会与环境 | 9篇 |
灾害及防治 | 2篇 |
出版年
2023年 | 1篇 |
2022年 | 5篇 |
2021年 | 6篇 |
2020年 | 1篇 |
2019年 | 3篇 |
2018年 | 7篇 |
2017年 | 4篇 |
2016年 | 7篇 |
2015年 | 8篇 |
2014年 | 8篇 |
2013年 | 10篇 |
2012年 | 11篇 |
2011年 | 14篇 |
2010年 | 3篇 |
2009年 | 6篇 |
2008年 | 17篇 |
2007年 | 11篇 |
2006年 | 7篇 |
2005年 | 3篇 |
2004年 | 7篇 |
2003年 | 6篇 |
2002年 | 3篇 |
2001年 | 7篇 |
2000年 | 4篇 |
1999年 | 2篇 |
1998年 | 3篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1992年 | 1篇 |
1986年 | 1篇 |
1981年 | 1篇 |
排序方式: 共有169条查询结果,搜索用时 62 毫秒
71.
Extra-pair paternity in the monogamous Alpine marmot revealed by nuclear DNA microsatellite analysis 总被引:8,自引:0,他引:8
Benoît Goossens Laurent Graziani Lisette P. Waits Etienne Farand Séverine Magnolon Jacques Coulon Marie-Claude Bel Pierre Taberlet Dominique Allainé 《Behavioral ecology and sociobiology》1998,43(4-5):281-288
The genetic parentage and pedigrees of 35 litters from 12 family groups of monogamous Alpine marmot (Marmota marmota) in the French Alps were analyzed using six hypervariable sequence repeat nuclear loci (microsatellites). All of the members
of these family groups were sampled during a 5-year period. Hairs taken directly from animals served as a source of DNA for
amplification of the loci. Our results indicate that the genetic mating system of the Alpine marmot is quite different from
a strictly monogamous breeding system. Extra-pair paternity occurred in 11 of the 35 litters (31.4%). Of the 134 juveniles
typed, 26 (19.4%) could be attributed to extra-pair copulation (EPC). We examine hypotheses which could explain the evolution
of EPC and discuss the different patterns of extra-pair mating.
Received: 11 July 1997 / Accepted after revision: 23 May 1998 相似文献
72.
Texier S Prigent-Combaret C Gourdon MH Poirier MA Faivre P Dorioz JM Poulenard J Jocteur-Monrozier L Moënne-Loccoz Y Trevisan D 《Journal of environmental quality》2008,37(6):2299-2310
Our knowledge of Escherichia coli (E. coli) ecology in the field is very limited in the case of dairy alpine grassland soils. Here, our objective was to monitor field survival of E. coli in cow pats and underlying soils in four different alpine pasture units, and to determine whether the soil could constitute an environmental reservoir. E. coli was enumerated by MPN using a selective medium. E. coli survived well in cow pats (10(7) to 10(8) cells g(-1) dry pat), but cow pats disappeared within about 2 mo. In each pasture unit, constant levels of E. coli (10(3) to 10(4) cells g(-1) dry soil) were recovered from all topsoil (0-5 cm) samples regardless of the sampling date, that is, under the snow cover, immediately after snow melting, or during the pasture season (during and after the decomposition of pats). In deeper soil layers below the root zone (5-25 cm), E. coli persistence varied according to soil type, with higher numbers recovered in poorly-drained soils (10(3) to 10(4) cells g(-1) dry soil) than in well-drained soils (< 10(2) cells g(-1) dry soil). A preliminary analysis of 38 partial uidA sequences of E. coli from pat and soils highlighted a cluster containing sequences only found in this work. Overall, this study raises the possibility that fecal E. coli could have formed a naturalized (sub)population, which is now part of the indigenous soil community of alpine pasture grasslands, the soil thus representing an environmental reservoir of E. coli. 相似文献
73.
Organochlorines (polychlorinated biphenyls and dioxin-like compounds) are suspected to play a role in the etiopathogenesis of endometriosis. This hypothesis, based on experimental data, has been circulating for years in the scientific community and several epidemiologic surveys have attempted to obtain confirmatory human data. The purpose of this mini-review is to provide an overview of the twelve epidemiological studies that have assessed the relationship between endometriosis and organochlorine exposure. Several studies did not observe a significant association between peritoneal endometriosis and organochlorines. The deep nodular form of endometriosis appears associated with a higher serum level of both dioxin-like compounds and polychlorobiphenyls. The type of control women, the nature of the chemicals measured, and the definition of the disease could modulate the ability to detect the possible relationship between endometriosis and organochlorine exposure. 相似文献
74.
75.
Chafika Mazouni Géraldine Porcu-Buisson Nadine Girard R. Sakr Dominique Figarella-Ballanger Béatrice Guidicelli Pascal Bonnier Marc Gamerre 《黑龙江环境通报》2003,23(2):104-107
Fetal brain tumors are rare and teratoma is considered as the most common. Fetal MR Imaging is currently used to evaluate cases of ventricular dilatation. We report a case of cerebral immature teratoma detected by ultrasonography because of ventricular dilatation at 24 gestational weeks. MRI was the more accurate imaging method in depicting the tumor and its consequences on brain development as well as in taking a decision with regard to the management of pregnancy. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
76.
Summary. Lactating rabbit females emit volatile odour cues that trigger specialized motor actions leading to sucking. But the activity
of these cues may change with advancing lactation. Here, we tested this possibility in three experiments. In Exp. 1, we assessed
whether 2-day-old pups respond differently to the odour of milk from females in early (day 2) as compared to late (day 23)
lactation. In Exp. 2, a compound bearing pheromonal properties, the Mammary Pheromone (MP), was dosed in these milks to assess
whether its concentration is correlated with behavioural activity. In Exp. 3, the responsiveness to a constant level of MP
was compared in d2 versus d23-pups. Run on 240 pups, the assays showed that a) the milk activity declines between d2 and d23
of lactation; b) during this same period, the concentration of the MP decreases in milk; c) the MP itself becomes less active
to elicit oral grasping in pre-weaning pups than in newborns. These results indicate that the MP is active during the period
when pups are exclusively dependent on milk. The convergent changes in emission and reception of this pheromone may sequentially
warrant that pups are first attracted to the mammae, and then that they progressively disinvest the mother as they begin to
eat solid food and to be attracted by other conspecifics. 相似文献
77.
78.
Emilie Farcy Thierry Burgeot Hansy Haberkorn Michel Auffret Laurent Lagadic Jean-Pierre Allenou Hélène Budzinski Nicolas Mazzella Romain Pete Micheline Heydorff Dominique Menard Florence Mondeguer Thierry Caquet 《Environmental science and pollution research international》2013,20(2):630-650
Estuarine areas represent complex and highly changing environments at the interface between freshwater and marine aquatic ecosystems. Therefore, the aquatic organisms living in estuaries have to face highly variable environmental conditions. The aim of this work was to study the influence of environmental changes from either natural or anthropogenic origins on the physiological responses of Mytilus edulis. Mussels were collected in the Vilaine estuary during early summer because this season represents a critical period of active reproduction in mussels and of increased anthropogenic inputs from agricultural and boating activities into the estuary. The physiological status of the mussel M. edulis was evaluated through measurements of a suite of biomarkers related to: oxidative stress (catalase, malondialdehyde), detoxication (benzopyrene hydroxylase, carboxylesterase), neurotoxicity (acetylcholinesterase), reproductive cycle (vitelline, condition index, maturation stages), immunotoxicity (hemocyte concentration, granulocyte percentage, phagocytosis, reactive oxygen species production, oxidative burst), and general physiological stress (lysosomal stability). A selection of relevant organic contaminant (pesticides, (polycyclic aromatic hydrocarbons, polychlorobiphenyls) was measured as well as environmental parameters (water temperature, salinity, total suspended solids, turbidity, chlorophyll a, pheopigments) and mussel phycotoxin contamination. Two locations differently exposed to the plume of the Vilaine River were compared. Both temporal and inter-site variations of these biomarkers were studied. Our results show that reproduction cycle and environmental parameters such as temperature, organic ontaminants, and algal blooms could strongly influence the biomarker responses. These observations highlight the necessity to conduct integrated environmental approaches in order to better understand the causes of biomarker variations. 相似文献
79.
Torsten Hees Bernd Wenclawiak Sönnke Lustig Peter Schramel Michael Schwarzer Michael Schuster Dominique Verstraete Richard Dams Eckard Helmers 《Environmental science and pollution research international》1998,5(2):105-111
Trace concentrations of the platinum group elements (PGE; here: Pt, Pd and Rh) play an important role in environmental analysis and assessment. Their importance is based on 1. their increasing use as active compartments in automobile exhaust catalysts, 2. their use as cancer anti-tumor agents in medicine. Due to their allergenic and cytotoxic potential, it is necessary to improve selectivity and sensitivity during analytical investigation of matrices like soil, grass, urine or blood. This paper summarizes the present knowledge of PGE in the fields of analytical chemistry, automobile emission rates, bioavailibility, toxicology and medicine. 相似文献
80.
Dominique G. Roche Rose E. O'Dea Kecia A. Kerr Trina Rytwinski Richard Schuster Vivian M. Nguyen Nathan Young Joseph R. Bennett Steven J. Cooke 《Conservation biology》2022,36(3):e13835
The knowledge-action gap in conservation science and practice occurs when research outputs do not result in actions to protect or restore biodiversity. Among the diverse and complex reasons for this gap, three barriers are fundamental: knowledge is often unavailable to practitioners and challenging to interpret or difficult to use or both. Problems of availability, interpretability, and useability are solvable with open science practices. We considered the benefits and challenges of three open science practices for use by conservation scientists and practitioners. First, open access publishing makes the scientific literature available to all. Second, open materials (detailed methods, data, code, and software) increase the transparency and use of research findings. Third, open education resources allow conservation scientists and practitioners to acquire the skills needed to use research outputs. The long-term adoption of open science practices would help researchers and practitioners achieve conservation goals more quickly and efficiently and reduce inequities in information sharing. However, short-term costs for individual researchers (insufficient institutional incentives to engage in open science and knowledge mobilization) remain a challenge. We caution against a passive approach to sharing that simply involves making information available. We advocate a proactive stance toward transparency, communication, collaboration, and capacity building that involves seeking out and engaging with potential users to maximize the environmental and societal impact of conservation science. 相似文献