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11.
Sp Thenappa S. Nguyen Phuc T. T. Do Nga H. N. Le Duyen K. Thai Quoc B. Le Phung K. Phan-Thien Nhan Duong Hai M. 《Journal of Material Cycles and Waste Management》2021,23(3):885-894
Journal of Material Cycles and Waste Management - Over 60 million tons of aluminium are produced annually, requiring sustainable and eco-friendly recycling methods of aluminium waste. In this work,... 相似文献
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Anne-Mathilde Thierry Sophie Brajon Marion Spée Thierry Raclot 《Behavioral ecology and sociobiology》2014,68(5):721-732
Glucocorticoid hormones (GCs) are important mediators of physiological and behavioral responses to stress. While many studies have evaluated the environmental, behavioral, or physiological correlates of GCs and their effects on reproductive performances, further work is needed to clarify the relationship between GCs and fitness. Assessing the effects of increased GC levels on specific behaviors of breeding animals should improve our understanding of how GCs affect parental care. In this experimental study, we measured the effects of an experimental increase in corticosterone (CORT, the main avian GC) levels on the behavior of free-living male Adélie penguins (Pygoscelis adeliae) within the colony, their reproductive output, and the indirect consequences of both on the behavior of their partners. We show that increased CORT levels in males decreased their foraging time at sea while increased their attendance at the nest, although their attentiveness toward the nest itself decreased. In addition, treated males spent more time on comfort behaviors (e.g., preening), vocalizing, and engaging in positive social interactions relative to controls. Treatment further affected the behavior of their partners, but not chick begging and feeding rates. Penguins with increased CORT levels also exhibited decreased reproductive output. Previous studies of Adélie penguins in different life history stages and environmental conditions suggest that the consequences of CORT treatment on reproductive performance are context-dependent. In addition to the potential delay in the effects of increased CORT levels on reproduction, this context dependence should be taken into account when studying the behavior of free-living animals in relation to stress-inducing situations. 相似文献
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Francisco Luiza Flavia Veiga do Amaral Crispim Bruno Spósito Juliana Caroline Vivian Solórzano Julio César Jut Maran Nayara Halimy Kummrow Fábio do Nascimento Valter Aragão Montagner Cassiana Carolina De Oliveira Kelly Mari Pires Barufatti Alexeia 《Environmental science and pollution research international》2019,26(24):24581-24594
Environmental Science and Pollution Research - Groundwaters are normally consumed without previous treatment and therefore the monitoring of contaminants in order to guarantee its safety is... 相似文献
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The Science of Nature - 相似文献
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Wierrani F Kubin A Loew HG Henry M Spängler B Bodner K Grünberger W Ebermann R Alth G 《Die Naturwissenschaften》2002,89(10):466-469
We report the development of a novel simple experimental method which allows the comparison of new photosensitizers based on their production of reactive oxygen species. A high-performance liquid chromatography (HPLC) assay permits the monitoring of several substances (sensitizer, reactant and oxidized end product) simultaneously on a single chromatogram. Photoreactions were monitored throughout their course by the HPLC assay surveying the sensitizers' efficiency of singlet oxygen production by the oxidative decomposition of luminol. Several photosensitizers were tested: Rose Bengal, Methylene Blue, Protoporphyrin IX, Photosan III, Photofrin, Hypericin and Pseudohypericin. Additionally, photoreactions were monitored by a standard pO2 detection system. The measurements of the two detection methods were strongly correlated. Rose Bengal proved to be the most efficient photosensitizer, clearly decreasing the luminol concentration and causing a corresponding increase in aminophthalic acid. Our experiments show that when factors necessary for photochemical reactions are absent or are blocked (antioxidants), no reaction can be detected. 相似文献
16.
Muthukumar V. Bagavathiannan Armin Spök Rene C. Van Acker 《Journal of Agricultural and Environmental Ethics》2011,24(3):227-242
Overall, the deregulation of genetically engineered (GE) crops for commercial cultivation in North America has been a success
story. In several cases, however, GE crops have sparked concerns and disagreements among the stakeholders and there are incidences
of court lawsuits, including a recent one on glyphosate resistant (GR) alfalfa (Medicago sativa, L.). While GE crops can provide operational benefits to farmers, challenges are looming from commercialization of perennial
GE crops. The unique ecology and biology of these crops and GE alfalfa in particular can facilitate adventitious presence
(AP) of GE traits and it makes more visible that economic risks for conventional growers and food/feed producers have not
been adequately addressed by the GE regulatory system in the United States (US). Asynchronous market approvals and the existence
of a number of GE sensitive export markets create uncertainties among the exporters. Policy development in these fields may
be helpful for ensuring a broader acceptance and market success of GE agriculture in general. The analysis is focusing on
the US, although many diagnosed problems are also relevant to other jurisdictions—in particular if no co-existence policy
is in place. 相似文献
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