Auflistung nach Schlagwort "ultraviolet radiation"

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  • Adaption of an array spectroradiometer for total ozone column retrieval using direct solar irradiance measurements in the UV spectral range 
    Zuber, Ralf; Sperfeld, Peter; Riechelmann, Stefan; Nevas, Saulius; Sildoja, Meelis; Seckmeyer, Gunther (Göttingen : Copernicus GmbH, 2018)
    A compact array spectroradiometer that enables precise and robust measurements of solar UV spectral direct irradiance is presented. We show that this instrument can retrieve total ozone column (TOC) accurately. The internal ...
  • Development and characterization of a single particle laser ablation mass spectrometer (SPLAM) for organic aerosol studies 
    Gaie-Levrel, F.; Perrier, S.; Perraudin, E.; Stoll, C.; Grand, N.; Schwell, M. (Göttingen : Copernicus GmbH, 2012)
    A single particle instrument was developed for real-time analysis of organic aerosol. This instrument, named Single Particle Laser Ablation Mass Spectrometry (SPLAM), samples particles using an aerodynamic lens system for ...
  • Effects of urban pollution on UV spectral irradiances 
    McKenzie, R.L.; Weinreis, C.; Johnston, P.V.; Liley, B.; Shiona, H.; Kotkamp, M.; Smale, D.; Takegawa, N.; Kondo, Y. (Göttingen : Copernicus GmbH, 2008)
    Spectral measurements of UV irradiances at Tokyo are compared with corresponding measurements at a pristine site (Lauder New Zealand) to identify the causes of the reductions in urban UV irradiances, and to quantify their ...
  • A highly stable monolithic enhancement cavity for second harmonic generation in the ultraviolet 
    Hannig, S.; Mielke, J.; Fenske, J.A.; Misera, M.; Beev, N.; Ospelkaus, C.; Schmidt, Piet O. (College Park, MD : American Institute of Physics, 2018)
    We present a highly stable bow-tie power enhancement cavity for critical second harmonic generation (SHG) into the UV using a Brewster-cut β-BaB2O4 (BBO) nonlinear crystal. The cavity geometry is suitable for all UV ...
  • Improvement of hydrothermal stability of zeolitic imidazolate frameworks 
    Liu, Xinlei; Li, Yanshuo; Ban, Yujie; Peng, Yuan; Jin, Hua; Bux, Helge; Xu, Longya; Caro, Jürgen; Yang, Weishen (Cambridge : Royal Society of Chemistry, 2013)
    The metal-organic framework ZIF-8, which undergoes hydrolysis under hydrothermal conditions, is endowed with high water-resistance after a shell-ligand-exchange-reaction. The stabilized ZIF-8 retains its structural ...
  • Light driven reactions of single physisorbed azobenzenes 
    Bazarnik, Maciej; Henzl, Jörg; Czajka, Ryszard; Morgenstern, Karina (Cambridge : Royal Society of Chemistry, 2011)
    We present a successful attempt of decoupling a dye molecule from a metallic surface via physisorption for enabling direct photoisomerization. Effective switching between the isomers is possible by exposure to UV light via ...
  • Light intensity dependence of the kinetics of the photocatalytic oxidation of nitrogen(ii) oxide at the surface of TiO2 
    Dillert, Ralf; Engel, Astrid; Große, Julia; Lindner, Patrick; Bahnemann, Detlef W. (Cambridge : Royal Society of Chemistry, 2013)
    Air pollution by nitrogen oxides represents a serious environmental problem in urban areas where numerous sources of these pollutants are concentrated. One approach to reduce the concentration of these air pollutants is ...
  • Photo-excited charge transfer from adamantane to electronic bound states in water 
    Wang, Xiangfei; Krause, Pascal; Kirschbaum, Thorren; Palczynski, Karol; Dzubiella, Joachim; Bande, Annika (Cambridge : RSC Publ., 2024)
    Aqueous nanodiamonds illuminated by UV light produce free solvated electrons, which may drive high-energy reduction reactions in water. However, the influence of water conformations on the excited-state electron-transfer ...
  • Ultraviolet supercontinuum generation using a differentially-pumped integrated glass chip 
    Wanie, Vincent; Barbato, Pasquale; Hahne, Josina; Ryabchuk, Sergey; Wahid, Ammar Bin; Amorim, David; Månsson, Erik P.; Trabattoni, Andrea; Osellame, Roberto; Martínez Vázquez, Rebeca; Calegari, Francesca (Bristol : IOP Publishing, 2024)
    We investigate the generation of ultrabroadband femtosecond ultraviolet (UV) radiation via third-order harmonic generation in highly confined gas media. A dual-stage differential-pumping scheme integrated into a glass ...
  • UV-blocking plastic films and nets influence vectors and virus transmission on greenhouse tomatoes in the humid tropics 
    Kumar, P.; Poehling, H.-M. (Annapolis, MD : Entomological Society of America, 2006)
    We studied the effect of UV-blocked greenhouses made from netting and plastics on the movement and pest status of three important pest of tomatoes: whitefly (Bemisia tabaci), thrips (Ceratothripoides claratris), and aphid ...
  • UV/Vis light induced degradation of oxytetracycline hydrochloride mediated by Co-TiO2 nanoparticles 
    Akel, Soukaina; Boughaled, Redouan; Dillert, Ralf; Azzouzi, Mohamed El; Bahnemann, Detlef W. (Basel : MDPI AG, 2020)
    Pharmaceuticals, especially antibiotics, constitute an important group of aquatic contaminants given their environmental impact. Specifically, tetracycline antibiotics (TCs) are produced in great amounts for the treatment ...
  • The world's highest levels of surface UV 
    Cordero, Raul R.; Seckmeyer, Gunther; Damiani, Alessandro; Riechelmann, Stefan; Rayas, Juan; Labbe, Fernando; Laroze, David (Cambridge : Royal Society of Chemistry, 2014)
    Chile's northern Atacama Desert has been pointed out as one of the places on earth where the world's highest surface ultraviolet (UV) may occur. This area is characterized by its high altitude, prevalent cloudless conditions ...