Search Results - "SEIDLITZ, H. K."

Spectral dependence of flavonol and betacyanin accumulation in Mesembryanthemum crystallinum under enhanced ultraviolet radiation by Ibdah, M., Krins, A., Seidlitz, H. K., Heller, W., Strack, D., Vogt, T.

“…Mesembryanthemum crystallinum L. (Aizoaceae) is a drought‐ and salt‐tolerant halophyte that is able to endure harsh environmental conditions. Upon irradiation…”
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Simulated solar irradiation with enhanced UV-B adjust plastid- and thylakoid-associated polyamine changes for UV-B protection by Lütz, C., Navakoudis, E., Seidlitz, H.K., Kotzabasis, K.

“…Polyamines have been described to protect against numerous oxidative stresses in plants. Increasing UV-B radiation (280–315 nm) in the biosphere may also…”
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The role of UV-B on the degradation of PCDD/Fs and PAHs sorbed on surfaces of spruce ( Picea abies (L.) Karst.) needles by Niu, Junfeng, Chen, Jingwen, Martens, D, Henkelmann, B, Quan, Xie, Yang, Fenglin, Seidlitz, H.K, Schramm, K.-W

“…Photodegradation of polychlorinated dibenzo- p-dioxins and dibenzofurans (PCDD/Fs) and polycyclic aromatic hydrocarbons (PAHs) sorbed on surfaces of spruce (…”
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Seasonal accumulation of ultraviolet‐B screening pigments in needles of Norway spruce (Picea abies (L.) Karst.) by FISCHBACH, R. J., KOSSMANN, B., PANTEN, H., STEINBRECHER, R., HELLER, W., SEIDLITZ, H. K., SANDERMANN, H., HERTKORN, N., SCHNITZLER, J.‐P.

“…Conifer needles are highly effective in screening ultraviolet‐B radiation (280–320 nm). This ability is mainly attributed to the presence of flavonoids and…”
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The effect of ozone in Scots pine (Pinus sylvestris L.): gene expression, biochemical changes and interactions with UV‐B radiation by Zinser, C., Jungblut, T., Heller, W., Seidlitz, H. K., Schnitzler, J.‐P., Ernst, D., Jr, H. Sandermann

“…ABSTRACT Increased levels of both ozone and ultraviolet‐B radiation (UV‐B) are typical for high‐altitude sites. Here we report on interactive effects of both…”
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Determination of the Calibration Factor of Polysulphone Film UV Dosemeters for Terrestrial Solar Radiation by Krins, A., Dörschel, B., Knuschke, P., K. Seidlitz, H., Thiel, S.

“…Polysulphone film is used as a personal UV dosemeter in dermatological or epidemiological studies. The relative efficiency of this detector does not exactly…”
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Catalase deficiency drastically affects gene expression induced by high light in Arabidopsis thaliana by Vandenabeele, S, Vanderauwera, S, Vuylsteke, M, Rombauts, S, Langebartels, C, Seidlitz, H.K, Zabeau, M, Montagu, M. van, Inze, D, Breusegem, F. van

“…In plants, hydrogen peroxide (H2O2) plays a major signaling role in triggering both a defense response and cell death. Increased cellular H2O2 levels and…”
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Elevated UV-B radiation reduces genome stability in plants by Ries, Gerhard, Heller, Werner, Puchta, Holger, Sandermann, Heinrich, Seidlitz, Harald K, Hohn, Barbara

“…Long-term depletion of the stratospheric ozone layer contributes to an increase in terrestrial solar ultraviolet-B radiation. This has deleterious effects on…”
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Spectral dependence of the inhibition of photosynthesis under simulated global radiation in the unicellular green alga Dunaliella salina by Ghetti, F., Herrmann, H., Häder, D.-P., Seidlitz, H.K.

“…The inhibition of photosynthesis after exposure to simulated solar radiation has been investigated in the marine green alga Dunaliella salina by monitoring the…”
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Spectral Shaping of Artificial UV-B Irradiation for Vegetation Stress Research by Döhring, Thorsten, Köfferlein, Matthias, Thiel, Stephan, Seidlitz, Harald K.

“…Ecological plant experiments using artificial light sources require careful shaping of the spectral irradiance. This includes the steep UV-absorption…”
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Effects of UV radiation on photosynthesis of phytoplankton exposed to solar simulator light by Herrmann, H., Häder, D.-P., Köfferlein, M., Seidlitz, H.K., Ghetti, F.

“…A sunlight simulator was used to investigate the effects of short term irradiation on photosynthetic oxygen production and chlorophyll fluorescence in the…”
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Optical resolution and color performance of electronic endoscopes by Seidlitz, H K, Classen, M

“…We studied the optical and color performance of Olympus fiber- and electronic endoscopes, including the EVIS 100 and EVIS 200 series. The measurements showed…”
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Photodegradation of protoporphyrin-dimethylester in solution and in organized environments by Wessels, J M, Sroka, R, Heil, P, Seidlitz, H K

“…The degradation of sensitizers used in photodynamic therapy (PDT) involves photooxidation either by molecular oxygen or by oxygen intermediates which leads to…”
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Time-resolved polarization measurements of porphyrin fluorescence in solution and in single cells by Seidlitz, H K, Schneckenburger, H, Stettmaier, K

“…Porphyrin monomers, dimers and aggregates, which can be differentiated on the basis of their fluorescence lifetimes, are shown to possess different degrees of…”
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Electronic endoscopy--the latest technology by Classen, M, Knyrim, K, Seidlitz, H K, Hagenmüller, F

“…At present, video endoscopic systems (VE) are available from four companies. We have had an opportunity to test these instruments in clinical practice. In…”
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Color performance of video endoscopes: quantitative measurement of color reproduction by Knyrim, K, Seidlitz, H K, Hagenmüller, F, Classen, M

“…We have conducted a study aimed at testing the color performance of video endoscopes in quantitative terms for the first time. The video endoscopes…”
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Modification of Global Erythemally Effective Irradiance by Clouds by Thiel, Stephan, Steiner, Karl, Seidlitz, Harald K.

“…ABSTRACT The role clouds play in the modification of global radiation is still a major uncertainty in the risk assessment of UV effects on ecological systems…”
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Video-endoscopes in comparison with fiberscopes: quantitative measurement of optical resolution by Knyrim, K, Seidlitz, H K, Hagenmüller, F, Classen, M

“…The subject of this study was the optical performance of video-endoscopic systems (VE) in terms of maximal resolving power and resolvable picture elements…”
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A Phytotron for Plant Stress Research: How Far Can Artificial Lighting Compare to Natural Sunlight? by Thiel, Stephan, Döhring, Thorsten, Köfferlein, Matthias, Kosak, Andre, Martin, Peter, Seidlitz, Harald K.

“…Plants have adapted very efficiently to their natural light habitat. Artificial plant illumination, therefore, requires careful design. Not only the quantity…”
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Physiological and structural changes in the chloroplast of the green alga Micrasterias denticulata induced by UV-B simulation by Lutz, C, Seidlitz, H.K

“…Exposure of postmitotic growing and non-growing cells of the unicellular green alga Micrasterias denticulata to different UV-B cut-off wavelengths together…”
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