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81.
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
82.
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
83.
Fadel Marc Courcot Dominique Afif Charbel Ledoux Frédéric 《Environmental Chemistry Letters》2022,20(5):3289-3311
Environmental Chemistry Letters - Air pollution is a major issue for human health with more than 7 million premature deaths per year due to indoor and outdoor air pollution. Exposure to particulate... 相似文献
84.
Dominique Berteaux Joël Bêty Eddie Rengifo Jean-Marie Bergeron 《Behavioral ecology and sociobiology》1999,45(3-4):283-291
Multiple paternity in single litters conceived in the wild was recently demonstrated in meadow voles (Microtuspennsylvanicus). In this study, we used an experimental approach (males tethered and females allowed to mate freely with one or several
males) to investigate the role of female meadow voles in multiple paternity. We found that among 29 (of 39) females that copulated
during our experiment, 79.3% chose to mate with more than one male. Female behavior in meadow voles thus clearly promotes
multiple paternity and their role is an active one. Some of the hypotheses explaining promiscuity in meadow voles should be
reconsidered in light of this result. We do not know the primary determinant of female mate choice, but male body mass played
a secondary role in driving female preferences. The partial dependence between male body mass and female choice, coupled with
the active role played by females, indicates that intersexual selection has the potential for reinforcing the effects of intrasexual
selection (male-male dominance relationships) in this species. Finally, we demonstrate that the time period over which tests
are conducted is an important part of the design of experiments aimed at understanding the role of females in multiple paternity.
Received: 14 April 1998 / Accepted after revision: 12 September 1998 相似文献
85.
Jocelyne de Laveaucoupet François Audibert Françoise Guis Caroline Rambaud Bruno Suarez Claire Boithias-Guérot Dominique Musset 《黑龙江环境通报》2001,21(9):729-736
The aim of the present study was to demonstrate the usefulness of fetal magnetic resonance imaging (MRI) in ischemic brain injury. We report seven cases of fetal brain ischemia prenatally suspected on ultrasound (US) and confirmed by fetal MRI. Sonographic abnormalities included ventricular dilatation (n=3), microcephaly (n=1), twin pregnancy with in utero death of a twin and suspected cerebral lesion in the surviving co-twin (n=3). MRI was performed with a 1.0 T unit using half-Fourier acquisition single-shot turbo spin-echo (HASTE) sequences between 28 and 35 weeks of gestation. US and MRI images were compared with pathologic findings or postnatal imaging. MRI diagnosed hydranencephaly (n=1), porencephaly (n=2), multicystic encephalomalacia (n=2), unilateral capsular ischemia (n=1), corpus callosum and cerebral atrophy (n=1). In comparison with US, visualization of fetal brain anomalies was superior with MRI. The present cases demonstrate that MRI is a valuable complementary means of investigation when a brain pathology is discovered or suspected during prenatal US. Copyright © 2001 John Wiley & Sons, Ltd. 相似文献
86.
A. Cohas N. G. Yoccoz A. Da Silva B. Goossens D. Allainé 《Behavioral ecology and sociobiology》2006,59(5):597-605
Extra-pair paternity (EPP) can be influenced by both social setting and female mate choice. If evidence suggests that females
try to obtain extra-pair copulations (EPCs) in order to gain genetic benefits when mated to a homozygous and/or to a related
male, females may not be able to choose freely among extra-pair mates (EPMs) as the social mate may constrain female access
to EPMs. In this study, we investigated, first, how EPP depended on social setting and specifically on the number of subordinate
males in the family group in a highly social and monogamous mammal, the alpine marmot. Second, we investigated how EPP depended
on female mate choice for genetic benefits measured as male mate-heterozygosity and within-pair relatedness. Our results reveal,
first, that EPP depended on the social setting, increasing with the number of subordinate males. Second, EPPs were related
to relatedness between mates. Third, EPMs were found to be more heterozygous than within-pair males. Thus, social setting
may constrain female choice by limiting opportunities for EPC. However, after accounting for social confounding factors, female
choice for genetic benefits may be a mechanism driving EPP in monogamous species. 相似文献
87.
88.
89.
Miriana?Kfoury Mireille?Borgie Anthony?Verdin Frédéric?Ledoux Dominique?Courcot Lizette?Auezova Sophie?FourmentinEmail authorView authors OrcID profile 《Environmental Chemistry Letters》2016,14(3):345-351
Outdoor air pollution and fine particulate matter (PM) were recently classified as carcinogenic to humans by the International Agency for Research on Cancer. The exposure to airborne particulate matter also contributes to cardiovascular and respiratory diseases, which are major public health concerns. Up to now, no work has evaluated the ability of essential oils as an alternative medicine to relieve the adverse health effects caused by airborne particulate matter. Here, we investigated for the first time the effects of four essential oil components, trans-anethole, estragole, eugenol and isoeugenol, on the reduction in inflammation induced by particulate matter with an aerodynamic diameter below 2.5 μm (PM2.5), in human bronchial epithelial (BEAS-2B) and human liver carcinoma (HepG2) cell lines. Anethole is a flavor component of anise and fennel, estragole is occurring in basil, eugenol occurs in clove bud oil and isoeugenol occurs in ylang-ylang. Essential oil components were tested either as free or hydroxypropyl-β-cyclodextrin-encapsulated forms. Control experiments showed that particulate matter (PM2.5) induced inflammation by secretion of pro-inflammatory cytokines IL-6 and IL-8. Our results show that the addition of either free or encapsulated essential oil components to particulate matter exposed cells decreased up to 96 % the cytokine IL-6 level, and by up to 87 % the cytokine IL-8 level. Overall our findings evidence for the first time that natural essential oil components counteract the inflammatory effects of particulate matter and that encapsulation in cyclodextrins preserved their properties. 相似文献
90.
Imane Abbas Ghidaa Badran Anthony Verdin Frédéric Ledoux Mohamed Roumié Dominique Courcot Guillaume Garçon 《Environmental Chemistry Letters》2018,16(2):439-475
Polycyclic aromatic hydrocarbons (PAHs) are worldwide pollutants produced mainly during incomplete combustion and pyrolysis of organic substances. PAH derivatives are components with hydrogen on the aromatic ring substituted by carbonyl-, nitro- and hydroxyl-functional groups (N-PAH, O-PAH or OH-PAH), or a group of heterocyclic PAHs containing one sulfur atom in place of a carbon atom in the aromatic ring. PAHs and their derivatives can be either introduced in the atmosphere directly in this form as primary pollutants, or formed by homogenous and heterogeneous oxidation reactions. During the last decades, interest on studying PAH derivatives has increased because derivatives may be more harmful than parent compounds. PAH derivatives have been detected in the atmospheric particulate matter in numerous cities worldwide. PAH derivatives enter living organisms by inhalation, oral ingestion and dermal contact. In vivo and in vitro experiments together with epidemiological studies have shown the toxic effects of PAH derivatives, notably for compounds present in airborne and diesel exhaust particles. Here we review the sources, the mechanisms of formation, the physicochemical properties, the analytical methods, and the toxicological effects of PAHs and their derivatives in airborne particulate matter. 相似文献