Visible light accelerates the ultraviolet A‐induced degradation of eumelanin and pheomelanin

2018 ◽  
Vol 32 (3) ◽  
pp. 441-447 ◽  
Author(s):  
Shosuke Ito ◽  
Ludger Kolbe ◽  
Gudrun Weets ◽  
Kazumasa Wakamatsu
Keyword(s):  
Visible Light ◽  
Ultraviolet A

Failure of omalizumab (Xolair®) in the treatment of a case of solar urticaria caused by ultraviolet A and visible light

2011 ◽  
Vol 27 (6) ◽  
pp. 336-337 ◽  
Author(s):  
Giacomo Duchini ◽  
Wolfgang Bäumler ◽  
Andreas J. Bircher ◽  
Kathrin Scherer
Keyword(s):  
Visible Light ◽  
Ultraviolet A ◽  
Solar Urticaria

scholarly journals Spectrum of virucidal activity from ultraviolet to infrared radiation

2020 ◽  
Vol 19 (10) ◽  
pp. 1262-1270 ◽  
Author(s):  
Luke Horton ◽  
Angeli Eloise Torres ◽  
Shanthi Narla ◽  
Alexis B. Lyons ◽  
Indermeet Kohli ◽  
...  
Keyword(s):  
Visible Light ◽  
Infrared Radiation ◽  
Ultraviolet B ◽  
Virucidal Activity ◽  
Ultraviolet A

There is evidence that other wavelengths beyond the traditional germicidal 254 nm UVC – namely far UVC (222 nm), ultraviolet B, ultraviolet A, visible light, and infrared radiation – have germicidal properties; however, data on UVC is the most robust.

scholarly journals Photosynthetic Response of Seagrasses to Ultraviolet-A Radiation and the Influence of Visible Light Intensity

1982 ◽  
Vol 69 (2) ◽  
pp. 341-344 ◽  
Author(s):  
Robert P. Trocine ◽  
John D. Rice ◽  
Gary N. Wells
Keyword(s):  
Light Intensity ◽  
Visible Light ◽  
Photosynthetic Response ◽  
Ultraviolet A

scholarly journals Degradation of Semiconductor Manufacturing Wastewater by Using a Novel Magnetic Composite TiO2/Fe3O4Photoreactor Design

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Chen-Yu Chang ◽  
Yung-Hsu Hsieh
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Semiconductor Manufacturing ◽  
Sol Gel ◽  
Fluorescent Light ◽  
Magnetic Composite ◽  
Ultraviolet A ◽  
Gel Method ◽  
Sol Gel Method

The purpose of this research is to develop a photocatalytic TiO2that can be activated by visible light and can be conveniently recollected for reusing. This research synthesizes the 20 to 40 nm TiO2/Fe3O4particles with magnetization of 5.8 emu/g using the modified sol-gel method followed by 500°C calcinations. The experiment verified that visible fluorescent light (VFL, contains no UV-A) could activate the photocatalytic activity of TiO2/Fe3O4particles as did ultraviolet A light (UV-A, 360 nm). Regular magnets can be used to separate TiO2/Fe3O4particles from solution. The results indicate that VFL-sirradiated TiO2/Fe3O4particles could decompose isopropanol (IPA) in the absence of UV-A and the issue of TiO2/Fe3O4recollection from water for reusing is also resolved.

scholarly journals Photostability of TiO2-Coated Wool Fibers Exposed to Ultraviolet B, Ultraviolet A, and Visible Light Irradiation

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Qi Tang ◽  
Hui Zhang ◽  
Ye Han ◽  
Dou Wang ◽  
Hailiang Wu
Keyword(s):  
Thermal Stability ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
High Intensity ◽  
Ultraviolet B ◽  
Light Irradiation ◽  
Ultraviolet A ◽  
Orientation Degree ◽  
X Ray ◽  
Wool Fibers

Abstract This study is to investigate the role of the coating of TiO2 nanoparticles deposited on wool fibers against high-intensity ultraviolet B (UVB), ultraviolet A (UVA), and visible light irradiation. The properties of tensile and yellowness and whiteness indices of irradiated TiO2-coated wool fibers are measured. The changes of TiO2-coated wool fibers in optical property, thermal stability, surface morphology, composition, molecular structure, crystallinity, and orientation degree are characterized using diffuse reflectance spectroscopy, thermogravimetric analysis, scanning electronic microscopy, energy-dispersive X-ray spectroscopy, Fourier-transform infrared spectroscopy, and X-ray diffraction techniques. Experimental results show that the tensile properties of anatase TiO2-coated wool fibers can be degraded under the high-intensity UVB, UVA, and visible light irradiation for a certain time, resulting in the loss of the postyield region of stress–strain curve for wool fibers. The coating of TiO2 nanoparticles makes a certain contribution to the tensile property, yellowness and whiteness indices, thermal stability, and surface morphology of wool fibers against high-intensity UVB, UVA, and visible light irradiation. The high-intensity UVB, UVA, and visible light can result in the photo-oxidation deterioration of the secondary structure of TiO2-coated wool fibers to a more or less degree. Meanwhile, the crystallinity and orientation degree of TiO2 coated wool fibers decrease too.

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