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排序方式: 共有188条查询结果,搜索用时 171 毫秒
21.
Stéphane Pfendler Olympe Einhorn Faisl Bousta Abderrahim Khatyr Laurence Alaoui-Sossé Lotfi Aleya Badr Alaoui-Sossé 《Environmental science and pollution research international》2017,24(27):21601-21609
A laboratory investigation of UV-C effects was conducted over a 62-h period: a much higher dose than in classic UV-C treatment was applied to five pigments and two painting binders used by prehistoric humans. Colorimetric parameters were compared to a control to see if UV-C can change pigment and binder color. Infrared spectroscopy, scanning electron microscopy, inductively coupled plasma and X-ray crystallography were also carried out to confirm colorimetric measurement. In order to understand how microorganism may physically deteriorate paintings, limestone blocks were painted and monitored until their complete colonization by algae, cyanobacteria, fungi and/or mosses. The results show that UV-C has no effect on mineral compounds. Conversely, it is noteworthy that binder color changed under both UV-C light conditions as well as in visible light. Concerning painted blocks, a fast proliferation has been observed with deterioration of the paintings. These results show the high importance of treating biofilm as soon as possible. Moreover, these findings may be a promising avenue inducing cave managers to use friendly UV-C light to treat contaminated cave paintings and also in the prevention of biodeterioration by lampenflora. 相似文献
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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
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Maria Sassine Laurence Burel Barbara D'Anna Christian George 《Atmospheric environment (Oxford, England : 1994)》2010,44(40):5468-5475
The kinetics of the heterogeneous reaction between gaseous HCHO and TiO2/SiO2 mineral coatings were investigated using a coated-wall flow tube to mimic HCHO loss on mineral aerosol and TiO2 coated depolluting urban surfaces. The measured uptake kinetics were strongly enhanced when the flow tube was irradiated with 340–420 nm UV light with an irradiance of 1.45 mW cm?2. The associated BET uptake coefficients ranged from (3.00 ± 0.45) × 10?9 to (2.26 ± 0.34) × 10?6 and were strongly dependent on HCHO initial concentration, relative humidity, temperature, and TiO2 content in the mineral coating, which ranged from 3.5 to 32.5 ppbv, 6–70%, 278–303 K, and 1–100 %wt, respectively. The measured kinetics were well described using a Langmuir–Hinshelwood type formalism. The estimated uptake coefficients were used to discuss the importance of heterogeneous HCHO surface loss, in terms of deposition lifetimes, as compared to major homogeneous gas-phase losses such as OH reaction and photolysis. It is found that deposition may compete with gas-phase removal of HCHO in a dense urban environment if more than 10% of the urban surface is covered with TiO2 treated material. 相似文献
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Francesca R. Grati Denise Molina Gomes Devika Ganesamoorthy Livia Marcato Simona De Toffol Eleonore Blondeel Francesca Malvestiti Laurence Loeuillet Anna Maria Ruggeri Robert Wainer Federico Maggi Azzedine Aboura Celine Dupont Anne Claude Tabet Fabien Guimiot Howard R. Slater Giuseppe Simoni François Vialard 《黑龙江环境通报》2013,33(1):32-41
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Aude Tessier Mélie Sarreau Fanny Pelluard Gwenaelle André Sophie Blesson Martine Bucourt Pierre Dechelotte Laurence Faivre Thierry Frébourg Alice Goldenberg Valérie Goua Corinne Jeanne-Pasquier Fabien Guimiot Annie Laquerriere Nicole Laurent Mathilde Lefebvre Philippe Loget Martine Maréchaud Charlotte Mechler Marie-Josée Perez Jean Christophe Sabourin Alain Verloes Sophie Patrier Anne-Marie Guerrot 《黑龙江环境通报》2016,36(13):1270-1275
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