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排序方式: 共有87条查询结果,搜索用时 62 毫秒
1.
Sharma Virender K. Ma Xingmao Lichtfouse Eric Robert Didier 《Environmental Chemistry Letters》2023,21(4):1933-1936
Environmental Chemistry Letters - Nanoplastics are probably much more dangerous for living organisms than microplastics because they are more abundant and reactive. They can potentially... 相似文献
2.
Mathieu Sicard Frédéric Chevalier Mickaël De Vlechouver Didier Bouchon Pierre Grève Christine Braquart-Varnier 《Die Naturwissenschaften》2010,97(9):819-826
Ecological factors modulate animal immunocompetence and potentially shape the evolution of their immune systems. Not only
environmental parameters impact on immunocompetence: Aging is one major cause of variability of immunocompetence between individuals,
and sex-specific levels of immunocompetence have also been frequently described. Moreover, a growing core of data put in light
that vertically transmitted symbionts can dramatically modulate the immunocompetence of their hosts. In this study, we addressed
the influence of gender, age and the feminising endosymbiont Wolbachia (wVulC) on variations in haemocyte density, total PO activity and bacterial load in the haemolymph of the terrestrial isopod
Armadillidium vulgare. This host–symbiont system is of particular interest to address this question since: (1) wVulC was previously shown as immunosuppressive in middle-aged females and (2) wVulC influences sex determination. We show that age, gender and Wolbachia modulate together immune parameters in A. vulgare. However, wVulC, which interacts with aging, appears to be the prominent factor interfering with both PO activity and haemocyte density.
This interference with immune parameters is not the only aspect of wVulC virulence on its host, as reproduction and survival are also altered. 相似文献
3.
Achour Terbouche Chafia Ait Ramdane-Terbouche Didier Hauchar Safia Djebbar 《环境科学学报(英文版)》2011,23(7):1095-1103
The adsorption capacities of new humic acids isolated from Yakouren forest (YHA) and Sahara (Tamenrasset: THA) soils (Algeria)
and commercial humic acid (PFHA) on polyaniline emeraldine base (PEB) were studied at pH 6.6. Also the adsorption of heavy
metals such as Cd2+, Zn2+ and Ni2+ on humic acid-polyaniline systems (HA-PEB) was investigated at the same conditions. HA-PEB
compounds were characterized by scanning electron microscopy (SEM), infrared spectrometry and cavity microelectrode. In addition,
batch adsorption and cavity microelectrode were used in the adsorption study of Cd2+, Zn2+ and Ni2+ on HA-PEB. To develop biocaptors
of polluting metals using a cavity microelectrode modified by HA-PEB systems, the adsorption kinetic and adsorption capacity were
investigated. The SEM analysis showed that the presence of humic acid affected the PEB surface and caused the formation of a
granular morphology. The maximum adsorption capacities (qmax) of PFHA, THA and YHA determined by adsorption isotherms were
91.31, 132.1 and 151.0 mg/g, respectively. Batch adsorption results showed that qmax of Cd2+, Zn2+ and Ni2+ on HA-PEB followed
the order: THA-PEB > YHA-PEB > PFHA-PEB. The voltammograms obtained with HA-PEB modified cavity microelectrode showed
the appearance of new redox couples reflecting the adsorption of HA on PEB. Metal-humic acid-polyaniline voltammograms were
characterized by appearance of oxidation-reduction couples or reduction wave corresponding to metal. Finally, the result may be
exploited to develop a biocaptor based on the cavity microelectrode amended by THA-PEB and YHA-PEB. 相似文献
4.
Pfendler Stéphane Einhorn Olympe Karimi Battle Bousta Faisl Cailhol Didier Alaoui-Sosse Laurence Alaoui-Sosse Badr Aleya Lotfi 《Environmental science and pollution research international》2017,24(31):24611-24623
Environmental Science and Pollution Research - Ultra-violet C (UV-C) treatment is commonly used in sterilization processes in industry, laboratories, and hospitals, showing its efficacy against... 相似文献
5.
Nabil El Moçayd Sophie Ricci Nicole Goutal Mélanie C. Rochoux Sébastien Boyaval Cédric Goeury Didier Lucor Olivier Thual 《Environmental Modeling and Assessment》2018,23(3):309-331
Assessing epistemic uncertainties is considered as a milestone for improving numerical predictions of a dynamical system. In hydrodynamics, uncertainties in input parameters translate into uncertainties in simulated water levels through the shallow water equations. We investigate the ability of generalized polynomial chaos (gPC) surrogate to evaluate the probabilistic features of water level simulated by a 1-D hydraulic model (MASCARET) with the same accuracy as a classical Monte Carlo method but at a reduced computational cost. This study highlights that the water level probability density function and covariance matrix are better estimated with the polynomial surrogate model than with a Monte Carlo approach on the forward model given a limited budget of MASCARET evaluations. The gPC-surrogate performance is first assessed on an idealized channel with uniform geometry and then applied on the more realistic case of the Garonne River (France) for which a global sensitivity analysis using sparse least-angle regression was performed to reduce the size of the stochastic problem. For both cases, Galerkin projection approximation coupled to Gaussian quadrature that involves a limited number of forward model evaluations is compared with least-square regression for computing the coefficients when the surrogate is parameterized with respect to the local friction coefficient and the upstream discharge. The results showed that a gPC-surrogate with total polynomial degree equal to 6 requiring 49 forward model evaluations is sufficient to represent the water level distribution (in the sense of the \(\ell _2\) norm), the probability density function and the water level covariance matrix for further use in the framework of data assimilation. In locations where the flow dynamics is more complex due to bathymetry, a higher polynomial degree is needed to retrieve the water level distribution. The use of a surrogate is thus a promising strategy for uncertainty quantification studies in open-channel flows and should be extended to unsteady flows. It also paves the way toward cost-effective ensemble-based data assimilation for flood forecasting and water resource management. 相似文献
6.
Gemeiner Hendryk de Araujo Dourado Thiago Sulato Everton Tiago Galhardi Juliana Aparecida Gomes Ana Carla Fernandes de Almeida Eduardo Menegário Amauri Antonio Gastmans Didier Kiang Chang Hung 《Environmental science and pollution research international》2017,24(25):20616-20625
Environmental Science and Pollution Research - The toxic metal lead (Pb) can be harmful to human health in various manners, but is also considered as a distinguished tracer of environmental... 相似文献
7.
8.
This article is both an essay to propose social chemistry as a new scientific discipline and a preface of the books Environmental
Chemistry for a Sustainable World. Environmental chemistry is a fast emerging discipline aiming at the understanding the fate
of pollutants in ecosystems and at designing novel processes that are safe for ecosystems. Past pollution should be cleaned,
and future pollution should be predicted and avoided (Lichtfouse et al. 2005a). Such advices are still not applied by humans as demonstrated by the Fukushima nuclear event and global warming. Human errors
are repeatable. We therefore suggest a possible solution, which involves bridging chemistry and society by integrating social
sciences in chemical research. In particular, citizen discourse analysis should be useful to design chemicals that are both
innovative and accepted by society. Then, we present the recent success of environmental chemistry through the foundation
of the Association of Chemistry and the Environment; the increase in the impact factor of Environmental Chemistry Letters
from 0.814 in 2006 to 2.109 in 2009; and over 35,000 chapter downloads of the book Environmental Chemistry. Lastly, we highlight
major topics of the new book series Environmental Chemistry for a Sustainable World (Lichtfouse et al. 2011a, b). The two first volumes are entitled Nanotechnology and Health Risk, and Remediation of Air and Water Pollution. 相似文献
9.
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