Results 11 to 20 of about 1,226,793 (307)
Optical and UV Investigation of the Envelope of AG Carinae [PDF]
International Astronomical Union Colloquium, 1989 The galactic LBV object AG Car is unique for assembling several interesting features: (i) a light curve typical of Hubble-Sandage variables, (ii) a largely variable P Cygni-type spectrum, (iii) a strong IR excess, and especially (iv) a small ring nebula.
Roberto Viotti +3 more
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UV Aging Effects on Polycarbonate Properties [PDF]
Journal of Failure Analysis and Prevention, 2020 This work deals with the effects of ultraviolet (UV) aging on polycarbonate (PC) properties. Thus, a PC was subjected to accelerated UV radiation with a wavelength range from 200 to 280 nm, at different times. Induced changes in the material were studied by UV–visible spectrophotometry, Fourier transform infrared (FTIR) spectroscopy and X-ray ...
Redjala, S. +5 more
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Communication: UV photoionization of cytosine catalyzed by Ag+ [PDF]
The Journal of Chemical Physics, 2015 The photo-induced damages of DNA in interaction with metal cations, which are found in various environments, still remain to be characterized. In this paper, we show how the complexation of a DNA base (cytosine (Cyt)) with a metal cation (Ag+) changes its electronic properties.
Martín I. Taccone +5 more
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Study on UV aging characteristics of low-grade asphalt in the desert climate
Materials Research Express, 2023 The Taklamakan Desert in China’s Xinjiang region faces severe heat conditions that cause rutting in asphalt pavements. In order to combat this issue, local construction management has been advocating for the utilization of low-grade asphalt with ...
Liang Song +4 more
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Age derivation from UV absorption indices and the effect of the UV upturn [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractWe exploit stellar population models of absorption features in the ultraviolet to assess their power in determining the age of the stellar population in galaxies. We focus in particular on features that can differentiate between an old UV-bright population, contributing to the UV upturn, and a young population due to recent star formation.
Le Cras, Claire +2 more
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BioResources, 2023 This study investigated the effects of Iroko wood flour (WF) and nano-titanium dioxide (TiO2) concentration on the properties of polypropylene (PP)-based composites, including accelerated weathering resistance, tribological behavior, thermal stability ...
İbrahim Halil Başboğa
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Applied Sciences, 2022 In recent years, nanoparticles have been introduced into warm-mix-modified asphalt to improve asphalt performance after sustaining ultraviolet (UV) aging, yet the evaluation of aging performance is often a descriptive characterization of rheological ...
Shengfeng Yang, Kezhen Yan, Wenyao Liu
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Applied Sciences, 2021 The purpose of this paper, based on the amount of ultraviolet (UV) radiation in different areas of China, was to give the corresponding measures to prevent UV aging of asphalt. In this paper, based on the average annual amount of UV radiation in China in
Ling Zou +5 more
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Adsorption of Cu2+ by UV aged polystyrene in aqueous solution
Ecotoxicology and Environmental Safety, 2022 Microplastics are the critical carriers of heavy metals in the environment. Thus, investigating the adsorption mechanisms between the microplastics and heavy metals is helpful to understand the migration and transformation pattern of the heavy metals in the environment.
Chao Chen +10 more
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Effect of ultraviolet accelerated aging on mechanical and optical properties of polycarbonate
Cailiao gongcheng, 2021 In order to explore the effect of accelerated UV aging on the mechanical and optical properties of polycarbonate, the changes of polycarbonate's transmittance, yellow index, tensile properties and flexural properties with aging time and radiation ...
SUN Qi-wei +6 more
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