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Journal articles on the topic 'Sunlight bleaching'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Travkin, Vlad V., Danila A. Semikov, Pavel A. Stuzhin, Ivan A. Skvortsov, and Georgy L. Pakhomov. "Sunlight Bleaching of Subporphyrazine Dye Films." Applied Sciences 13, no. 2 (2023): 1211. http://dx.doi.org/10.3390/app13021211.

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Stable subphthalocyanine-type dyes with a high electron affinity attract much attention as potential substitutes for traditional fullerenes in molecular electronics devices. One possible way to enhance the acceptor properties of the subphthalocyanine core is by replacing the peripheral benzene fragments (C6H4) with 1,2,5-thiadiazole fragments (C2N2S1). However, the resistance of these materials to light or atmospheric effect remains an open question, which limits their further application in device manufacturing. In this work, we compare vacuum-deposited films of three derivatives, SubPzS3H0 (

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2

Frank, H., and W. Frank. "Chlorophyll-bleaching by atmospheric pollutants and sunlight." Naturwissenschaften 72, no. 3 (1985): 139–41. http://dx.doi.org/10.1007/bf00490396.

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Robertson, Gillian B., John R. Prescott, and John T. Hutton. "Bleaching of the thermoluminescence of feldspars by sunlight." International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements 18, no. 1-2 (1991): 101–7. http://dx.doi.org/10.1016/1359-0189(91)90100-v.

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4

Yanchou, Lu, J. R. Prescott, and J. T. Hutton. "Sunlight bleaching of the thermoluminescence of Chinese loess." Quaternary Science Reviews 7, no. 3-4 (1988): 335–38. http://dx.doi.org/10.1016/0277-3791(88)90025-x.

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5

Church, Jeffrey S., Keith Fincher, and Xingdong Wang. "UV-A and Simulated Sunlight Photo-activity of TiO2 Nanoparticles Formed from Titanate Nanotubes." Australian Journal of Chemistry 63, no. 2 (2010): 293. http://dx.doi.org/10.1071/ch09239.

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Sodium titanate nanotubes were prepared hydrothermally and sodium ions were exchanged for hydrogen ions by washing with water and further treatment with HCl. No anatase or rutile was produced during the exchange. Photo-catalysts were prepared by calcination and their activity was compared in UV-A and simulated sunlight by bleaching methyl orange, which does not adsorb onto the catalyst’s surface. Only photo-catalysts with low sodium content were capable of bleaching the dye. More photo-oxidation occurred in simulated sunlight suggesting that the dye is absorbing visible light and transferring

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Lin, Min, Gongming Yin, Kongyan Han, Jifei Bao, Jingwei Liu, and Li Jia. "Natural sunlight bleaching of the aluminum center in quartz." Radiation Measurements 42, no. 10 (2007): 1605–9. http://dx.doi.org/10.1016/j.radmeas.2007.08.010.

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International, Journal of Medical Science and Advanced Clinical Research (IJMACR). "A Questionnaire Based Assessment of Skin Bleaching Practice Among Female Medical Students in A Tertiary Care Institute: A Cross Sectional Study." International Journal of Medical Science and Advanced Clinical Research (IJMACR) 8, no. 2 (2025): 118–28. https://doi.org/10.5281/zenodo.15240337.

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<strong>Abstract</strong> <strong>Introduction: </strong>Skin bleaching involves the application of chemicals such as ammonia, hydrogen peroxide, and hypochlorite, either in salons or at home, with repeated treatments over time. Skin bleaching products often contain hazardous ingredients that can lead to adverse outcomes, including rashes, dryness, sunburns, and more severe long-term effects such as DNA damage and increased vulnerability to skin cancers. Despite these effects there is a scarcity of medical research and literature focused on their misuse.<sup> (1)</sup> <strong>Aims and objecti

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Gao, Lu, Gong-Ming Yin, Chun-Ru Liu, Jean-Jacques Bahain, Min Lin, and Jian-Ping Li. "Natural sunlight bleaching of the ESR titanium center in quartz." Radiation Measurements 44, no. 5-6 (2009): 501–4. http://dx.doi.org/10.1016/j.radmeas.2009.03.033.

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9

Ibrahim, Huthman Oluwaseun, Ghandi Abdur Razak, Nagwari Umar, Akinyemi Raphael Akinsola, Adenowo Thomas Kehinde, and Huthman Adebukola Selimot. "Sunlight: A Substitute to Hydrogen Peroxide and Monosodium Glutamate as a Bleaching Agent in Bone Bleaching." Open Journal of Biomedical Materials Research 1, no. 2 (2014): 15. http://dx.doi.org/10.12966/ojbmr.04.01.2014.

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10

SURMACKI, ADRIAN. "Preen waxes do not protect carotenoid plumage from bleaching by sunlight." Ibis 150, no. 2 (2008): 335–41. http://dx.doi.org/10.1111/j.1474-919x.2007.00796.x.

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11

Galli, Anna, Alessia Artesani, Marco Martini, Emanuela Sibilia, Laura Panzeri, and Francesco Maspero. "An empirical model of the sunlight bleaching efficiency of brick surfaces." Radiation Measurements 107 (December 2017): 67–72. http://dx.doi.org/10.1016/j.radmeas.2017.10.004.

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12

Savoye, Liliane, Michel Petit-Conil, and Valérie Meyer. "Mechanisms of TMP peroxide bleaching using Mg-based alkalis." Holzforschung 65, no. 6 (2011): 797–803. http://dx.doi.org/10.1515/hf.2011.109.

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Abstract The driving force for pulp and paper industry is to develop new technologies with less impact to the environment. In this context, the successful approach in the present paper was the substitution of sodium hydroxide during peroxide bleaching of thermomechanical pulp (TMP) by magnesium hydroxide or magnesium carbonate. Looking at brightening development, thioacidolysis showed that Mg-based processes eliminated less coniferaldehydes than NaOH-based bleaching. Moreover, 19F NMR analysis showed slightly more residual quinone in lignin isolated from NaOH-based bleached pulp than lignin ex

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13

Lindvall, A., R. Stjern, and H. Alexanderson. "Bleaching of quartz OSL signals under natural and laboratory light conditions." Ancient TL 35, no. 2 (2017): 12–20. https://doi.org/10.26034/la.atl.2017.514.

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Resetting or bleaching of the luminescence signal is a fundamental factor in luminescence dating. It must occur in nature during the event or process to be dated for an accurate age, but if it happens during sample processing in the laboratory it destroys the sample for dating purposes. In this study, we look into bleaching of quartz optically stimulated luminescence by light in nature and in the laboratory. Unsieved quartz-rich extracts and 180– 250 µm quartz grains with known doses were exposed to outdoor light and laboratory light sources, respectively, and the change in dose with exposure

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14

Zhong, M., and M. Jang. "Dynamic light absorption of biomass burning organic carbon photochemically aged under natural sunlight." Atmospheric Chemistry and Physics Discussions 13, no. 8 (2013): 20783–807. http://dx.doi.org/10.5194/acpd-13-20783-2013.

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Abstract. Wood burning aerosol produced under smoldering conditions was photochemically aged with different relative humidity (RH) and NOx conditions using a 104 m3 dual outdoor chamber under natural sunlight. Light absorption of organic carbon (OC) was measured over the course of photooxidation using a UV–visible spectrometer connected to an integrating sphere. At high RH, the color decayed rapidly. NOx slightly prolonged the color of wood smoke, suggesting that NOx promotes the formation of chromophores via secondary processes. Overall, the mass absorption cross-section (integrated between 2

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Zhong, M., and M. Jang. "Dynamic light absorption of biomass-burning organic carbon photochemically aged under natural sunlight." Atmospheric Chemistry and Physics 14, no. 3 (2014): 1517–25. http://dx.doi.org/10.5194/acp-14-1517-2014.

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Abstract. Wood-burning aerosol produced under smoldering conditions was photochemically aged with different relative humidity (RH) and NOx conditions using a 104 m3 dual outdoor chamber under natural sunlight. Light absorption of organic carbon (OC) was measured over the course of photooxidation using a UV–visible spectrometer connected to an integrating sphere. At high RH, the color decayed rapidly. NOx slightly prolonged the color of wood smoke, suggesting that NOx promotes the formation of chromophores via secondary processes. Overall, the mass absorption cross section (integrated between 2

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16

Robertson, Gillian B., John R. Prescott, and John T. Hutton. "Bleaching of the thermoluminescence of feldspars by selected wavelengths present in sunlight." Nuclear Tracks and Radiation Measurements 21, no. 2 (1993): 245–51. http://dx.doi.org/10.1016/1359-0189(93)90169-a.

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17

Cunningham, A. C., J. Wallinga, N. Hobo, A. J. Versendaal, B. Makaske, and H. Middelkoop. "Re-evaluating luminescence burial doses and bleaching of fluvial deposits using Bayesian computational statistics." Earth Surface Dynamics 3, no. 1 (2015): 55–65. http://dx.doi.org/10.5194/esurf-3-55-2015.

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Abstract. The optically stimulated luminescence (OSL) signal from fluvial sediment often contains a remnant from the previous deposition cycle, leading to a partially bleached equivalent-dose distribution. Although identification of the burial dose is of primary concern, the degree of bleaching could potentially provide insights into sediment transport processes. However, comparison of bleaching between samples is complicated by sample-to-sample variation in aliquot size and luminescence sensitivity. Here we begin development of an age model to account for these effects. With measurement data

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18

Fitt, William K. "Bleaching and a Corallivore of the Coral Siderastrea radians in the Florida Keys." Journal of Marine Science and Engineering 13, no. 4 (2025): 650. https://doi.org/10.3390/jmse13040650.

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The tropical coral Siderasterea radians is typically found in mangrove areas, seagrass beds, and environments tolerated by few other scleractinians in the Caribbean and South Florida. Siderastrea radians experience bleaching stress in Buttonwood Sound in Florida Bay during April–May, a time when the seawater is below bleaching temperatures. Stress first appears as a pink coloration due to the presence of fluorescent pigments protecting the coral tissue and algal symbionts from exposure to excessive sunlight/UV light. Surveys of S. radians in areas frequented by parrotfish showed that up to 38.

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Assumpção, Aline M. C., Juliano A. Bonacin, Sergio H. Toma, Vitor M. Zamarion, and Henrique E. Toma. "Probing surface−complex interactions with the bis(4-thienylterpyridine)iron(II) complex anchored on TiO2 and gold nanoparticles." Canadian Journal of Chemistry 92, no. 10 (2014): 918–24. http://dx.doi.org/10.1139/cjc-2014-0025.

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The bis(4-thienylterpyridine)iron(II) complex was employed, in comparison with the 4-phenylterpyridine analogue, as a molecular probe for monitoring the surface plasmon interactions with gold nanoparticles. The two complexes exhibited distinct SERS responses, confirming the binding of the thienyl group to the gold nanoparticles. Their inclusion into β-cyclodextrin anchored on TiO2 surfaces provided a useful system for applications in UV dosimetry, based on the gradual bleaching of the violet-blue color under sunlight and air.

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20

Horák, Ondřej, Martin Pyszko, Václav Páral, and Ondřej Šandor. "Degreasing and bleaching bones using light sources as a tool to increase the safety of teaching osteology at the University of Veterinary Sciences Brno." PeerJ 10 (September 28, 2022): e14036. http://dx.doi.org/10.7717/peerj.14036.

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The key part of creating bone material for teaching is degreasing and whitening it. However, the substances used are often dangerous and toxic. We tested and compared safer methods based on two physical variables. These are light and heat. The material for our study was 45 femurs from 23 adult domestic dogs (Canis lupus f. familiaris). The bones were divided into three groups of 15 pieces according to the method used to remove muscles and ligaments from their surface. Five femurs from each group were exposed to three different light sources for 28 days—sunlight, warm light from a classical inc

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21

Wei, Chuan-Yi, Chun-Ru Liu, Chang-An Li, et al. "Application of long time artificial optical bleaching of the E1’ centre to sediment ESR dating." Geochronometria 46, no. 1 (2019): 79–86. http://dx.doi.org/10.1515/geochr-2015-0106.

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Abstract Three quartz samples extracted from different origins were collected for ESR evaluation to appreciate the optical bleaching characteristics of the E1’ centre in a long time scale. After exposure of about 400 hours to artificial sunlight, the E1’ centre were bleached to a steady increasing level, about 2.5 times of its natural level, and the increase level also exhibit a small variability among different sample origins. The constant increasing level provide a significantly evidence for the potential use of the natural signal intensities of quartz E1’ centre in tracing sediment provenan

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22

Jungner, Högne. "Result from a comparison of UV and sunlight bleaching of feldspar and quartz." Quaternary Science Reviews 7, no. 3-4 (1988): 331–33. http://dx.doi.org/10.1016/0277-3791(88)90024-8.

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23

F., Khamis, and E. Arafah D. "Thermoluminescence Characteristics of Different Types of Natural Marble and the Effect of Annealing Temperatures." Asian Journal of Physical and Chemical Sciences 2, no. 2 (2017): 1–16. https://doi.org/10.9734/AJOPACS/2017/34624.

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<strong>Aims</strong>: This paper presents preliminary results on the characteristics of different marbles from Libya and Jordan. Several samples were collected and analyzed using thermoluminesence (TL) technique. <strong>Study Design:</strong> Study the effect of annealing temperature on the nature and the kinetics of TL trapping centers of natural marble was studied. <strong>Place and Duration of Study: </strong>Samples: Department of Physics (Atomic Physics Lab's, The University of Jordan), between June and August 2016. <strong>Methodology:</strong> Samples of high purity marble powder were

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24

Del Río, I., A. O. Sawakuchi, D. Giordano, T. D. Mineli, L. Nogueira, and T. Abede. "Athermal stability, bleaching behavior and dose response of luminescence signals from almandine and kyanite." Ancient TL 37, no. 1 (2019): 11–21. https://doi.org/10.26034/la.atl.2019.530.

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In order to evaluate the suitability of minerals other than quartz and feldspar for luminescence dating of sediments, luminescence properties from almandine and kyanite relevant for dosimetry such as luminescence signal stability, bleachability by sunlight exposure, and dose response are investigated. Thermoluminescence (TL) signals (UV emission) from almandine aliquots present athermal instability for the entire tested TL temperature range (25 – 450 °C). Almandine also presents a significant infrared stimulated luminescence (IRSL), post-infrared IRSL (post-IR IRSL) and optically stimulated lu

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25

TOOR, AMRIT PAL, VASUNDHARA SINGH, CHAND KIRAN JOTSHI, PRAMOD KUMAR BAJPAI, and ANOOP VERMA. "Treatment of Bleaching Effluent From the Pulp and Paper Industry by Photcatalytic Oxidation." TAPPI Journal 6, no. 6 (2007): 9–13. http://dx.doi.org/10.32964/tj6.6.9.

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We investigated the photocatalytic degradation of COD in bleach plant effluent in a low-cost, nonconcentrating shallow pond slurry reactor using artificial UV light. We studied the photocatalytic oxidative degradation using Degussa P25 titatium dioxide (TiO2). Effects on degradation of catalyst loading, initial COD values, UV intensity, and aperture-to-volume ratio of the reactor were studied. Degradation rates were strongly influenced by some of these measures. Treatment efficiencies declined with a decrease in UV light intensity and increased with an increase in aperture-to-volume ratio. Res

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Pawlak, N. K., A. Timar-Gabor, and A. Chruścińska. "Residual Hole Concentration in Recombination Centres after Bleaching." Geochronometria 48, no. 1 (2021): 415–27. http://dx.doi.org/10.2478/geochr-2021-0008.

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Abstract Trapped charge dating method using electron spin resonance (ESR) of quartz is progressively used for sediment dating. ESR signals can be used for accurate age estimation only when these signals are zeroed by sunlight exposure before the layer creation or when one knows their ESR residual level (the part of the signal that is not bleached). It is well known that the ESR signal related to the Al-hole centres in quartz used for sediment dating has a significant residual signal. From the point of view of luminescence models, as a hole trap, the Al-hole centre is considered as a recombinat

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Cheng, S. Y., C. W. M. Yuen, C. W. Kan, and K. K. L. Cheuk. "Analysis of Keratin Fibre Damage under Various Surface Treatment Conditions." Research Journal of Textile and Apparel 12, no. 1 (2008): 53–62. http://dx.doi.org/10.1108/rjta-12-01-2008-b007.

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This paper investigates the effect of three different treatments, namely (i) sunlight exposures, (ii) bleaching and (iii) perming on the damage of the keratin fibres (with the use of human hair). Scanning electron microscopy was applied to examine the surface morphology of the samples. Hair samples appeared to be rougher and their scales diminished after the treatments. The degree of colour change of samples was measured using a diffuse reflectance spectrophotometer. All three different treatments caused a certain degree of colour change on the samples. Urea bisulphite solubility test was also

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Muktaridha, Muktaridha, Irhami S, and Syurkani Ali. "Studi Perubahan Warna Dan Kekuatan Tarikan Eceng Gondok Hasil Pemutihan Menggunakan Hidrogen Peroksida." JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI 12, no. 2 (2024): 293. http://dx.doi.org/10.24843/jrma.2024.v12.i02.p13.

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Water hyacinth is an aquatic plant often used as a craft product because it is attractive for its various positive properties but requires further handling, especially regarding its color. White is one of the most popular types, and the manufacturing process involves bleaching stages using chemical compounds such as hydrogen peroxide (H2O2). The use of H2O2 in the bleaching process still has consequences for the quality of the material, which becomes easily damaged, and the bleaching process, which involves the presence of sunlight or ultraviolet lamps, occurs more quickly. This research exami

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SCHULZ, MICHAŁ, ALEKSANDRA ŁOŚ, PATRYCJA SKOWRONEK, and ANETA STRACHECKA. "Prominence of environmental and anthropogenic agents on the occurrence of coral reef bleaching syndrome and coral diseases." Medycyna Weterynaryjna 74, no. 10 (2024): 6139–2024. http://dx.doi.org/10.21521/mw.6139.

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Coral reefs are the most productive ecosystems on Earth. They ensure the conservation of biodiversity and are a live habitat for 25% of all marine organisms. The main relationship on the coral reef is the symbiosis between corals and algae from the genus Symbiodinium (commonly called zooxanthellae). The authors of this publication have characterized and described the factors limiting the occurrence of coral reefs, including: water temperature, salinity, access to sunlight, contamination, physicochemical and hydromechanical parameters of water. Moreover anthropogenic threats to coral reefs have

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30

Toyoda, Shin, Pierre Voinchet, Christophe Falguères, Jean Michel Dolo, and Michel Laurent. "Bleaching of ESR signals by the sunlight: a laboratory experiment for establishing the ESR dating of sediments." Applied Radiation and Isotopes 52, no. 5 (2000): 1357–62. http://dx.doi.org/10.1016/s0969-8043(00)00095-6.

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31

LILI, LI, LIU WENWEN, LUO ZHIYING, et al. "THE EFFECT OF UV ABSORBERS ON THE LIGHTFASTNESS OF DYED VENEERS." Wood Research 70, no. 2 (2025): 237–49. https://doi.org/10.37763/wr.1336-4561/70.2.237249.

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To address the problems of fading, surface yellowing and breakage of dyed veneers under prolonged sunlight, this paper uses ash veneers as raw material and new coccine as dye to investigate the effects of bleaching pretreatment, different concentrations (0.5%, 1% and 1.5%) and types of UV absorbers (benzotriazole, TiO2, nano-TiO2) on the color difference value △E of the dyed veneers in the process of aging by natural light and aging by artificial light. The effect of UV absorbers on the color difference △E of dyed veneers during natural light aging and artificial light aging was clarified. The

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32

Doerschner, Nina, Marion Hernandez, and Kathryn E. Fitzsimmons. "Sources of variability in single grain dose recovery experiments: Insights from Moroccan and Australian samples." Ancient TL 34, no. 1 (2016): 14–25. https://doi.org/10.26034/la.atl.2016.500.

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In our study, we investigate the quartz singlegrain dose recovery characteristics of five aeolian samples from three archaeological sites in Australia and Morocco. Comparatively small (20 – 49 Gy) and high (180 – 208 Gy) doses were applied to sand-sized quartz grains of each sample. Samples were bleached by green laser, sunlight and solar simulator stimulation. We observed a primary dependency of the results on the size of the administered dose, but also observed sample-specific responses to the chosen dose recovery measurement parameters. The Australian samples originate from an openair archa

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33

Bi, Weili, Chaolu Yi, Haijun Yang, Xiangke Xu, and Gang Hu. "The ESR Signals in Different Minerals and the Bleaching of Feldspar." Minerals 13, no. 8 (2023): 1108. http://dx.doi.org/10.3390/min13081108.

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The use of quartz is critical to the electron spin resonance (ESR) dating of sediments and fault gouges. The germanium center (Ge center) in quartz is a commonly used color center employed in ESR signal measurement. Although Ge center signals in quartz can be detected using an ESR spectrometer, they are weak and sometimes undetectable. Impurities in quartz grains can further aggravate these deficiencies and may even invalidate any attempt to repeat ESR ages due to the deficiencies evident in the processes used in sample preparation. Using sieving, carbonate-organic matter removal, water flotat

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Kang, Kwang-Mo, and Yoon-Chae Nah. "High-Performance Electrochromic Devices Composed of Niobium Tungsten Oxide Films." ECS Meeting Abstracts MA2024-02, no. 38 (2024): 2567. https://doi.org/10.1149/ma2024-02382567mtgabs.

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Electrochromic technology plays a pivotal role in various industries, offering significant benefits in energy efficiency and sustainability. By efficiently modulating sunlight, it reduces dependence on traditional climate control systems, thus decreasing overall energy consumption. Among electrochromic materials, tungsten oxide (WO3) is highly favored for its outstanding stability and superior optical modulation amplitude. However, the escalating demands of commercial applications necessitate enhancements in electrochromic performance, achievable through doping or composite designs. This study

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Pouretedal, H. R., H. Beigy, and M. H. Keshavarz. "Bleaching of Congo red in the presence of ZnS nanoparticles, with dopant of Co2+ion, as photocatalyst under UV and sunlight irradiations." Environmental Technology 31, no. 11 (2010): 1183–90. http://dx.doi.org/10.1080/09593330903414220.

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Quigley, Killian. "Caring for colour: Multispecies aesthetics at the Great Barrier Reef." Queensland Review 28, no. 2 (2021): 82–93. http://dx.doi.org/10.1017/qre.2022.4.

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AbstractThe Great Barrier Reef has been bleaching yet again. If the Anthropocene had a colour table, bleached coral would hold an especially recognizable place within it. By some lights, chromatic behaviour — and chromatic disaster — are best apprehended as secondary qualities, as spectacles that offer to point the discerning observer beyond the tokens of human sense and toward an object’s (or ecosystem’s) essential properties. This article asks whether it is possible, and ethically viable, to recognise corallian colour practice as having meaning in and of itself. I argue that we should recogn

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Sabatini, Francesca, Jacopo La Nasa, Ilaria Degano, et al. "Fluorescent Paints in Contemporary Murals: A Case Study." Heritage 6, no. 8 (2023): 5689–99. http://dx.doi.org/10.3390/heritage6080299.

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Recently, a notable change has occurred in how street art murals are perceived by art history and the general public, with a growing recognition of their social and cultural significance and a new focus on preserving the most representative modern urban murals for future generations. An interesting case study is constituted by the “UBUNTU” mural (Ivan Pontevia and Daniele Castagnetti, Reggio Emilia, 2018), whose appearance has radically changed in a few years. Indeed, the intense and direct exposure to sunlight as well as the environmental and polluting agents have induced the bleaching and fa

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Chakrabarty, Rajan K., Nishit J. Shetty, Arashdeep S. Thind, et al. "Shortwave absorption by wildfire smoke dominated by dark brown carbon." Nature Geoscience 16, no. 8 (2023): 683–88. http://dx.doi.org/10.1038/s41561-023-01237-9.

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AbstractWildfires emit large amounts of black carbon and light-absorbing organic carbon, known as brown carbon, into the atmosphere. These particles perturb Earth’s radiation budget through absorption of incoming shortwave radiation. It is generally thought that brown carbon loses its absorptivity after emission in the atmosphere due to sunlight-driven photochemical bleaching. Consequently, the atmospheric warming effect exerted by brown carbon remains highly variable and poorly represented in climate models compared with that of the relatively nonreactive black carbon. Given that wildfires ar

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Lewis, Claire J., Shayle B. Matsuda, Tayler L. Sale, et al. "Light-driven phenotypic plasticity in the depth-generalist coral, Pavona varians." PLOS One 20, no. 7 (2025): e0326069. https://doi.org/10.1371/journal.pone.0326069.

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Climate change is causing shifts in the spatial distribution of species and a reshuffling of the composition of multiple community types. On coral reefs, deep water can act as both refuges and refugia for corals from the combined negative effects of heat and light stress. Phenotypically plastic generalists that can tolerate both low and high light environments could be disproportionately important on future reefs, persisting in refugia and colonizing vacant shallow reefs. We performed a common garden experiment to investigate the effect of light on three different wild-collected genotypes of t

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Aroca-Delgado, Raúl, José Pérez-Alonso, Ángel Callejón-Ferre, and Borja Velázquez-Martí. "Compatibility between Crops and Solar Panels: An Overview from Shading Systems." Sustainability 10, no. 3 (2018): 743. http://dx.doi.org/10.3390/su10030743.

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The use of alternative energy in agricultural production is desired by many researchers, especially for protected crops that are grown in greenhouses with photovoltaic panels on the roofs. These panels allow for the passage of varying levels of sunlight according to the needs of each type of crop. In this way, sustainable and more economic energy can be generated than that offered by fossil fuels. The objective of this work is to review the literature regarding the applications of selective shading systems with crops, highlighting the use of photovoltaic panels. In this work, shading systems h

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Peters, Frank B., and Andreas O. Rapp. "Wavelength-dependent photodegradation of wood and its effects on fluorescence." Holzforschung 76, no. 1 (2021): 60–67. http://dx.doi.org/10.1515/hf-2021-0102.

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Abstract Apart from some strongly fluorescent wood species, the general fluorescence of wood has long been ignored. Recent studies suggest that each species has a distinct fluorescence, originating from both basic components and characteristic extractives. However, wood colour and fluorescence rapidly change upon exposure to sunlight. In this study, 288 samples of Acer pseudoplatanus, Quercus robur, Picea abies and Juglans nigra were irradiated with different bands of ultraviolet (UV) and visible (VIS) light. Photosensitivity was examined in regards of colour, infrared absorbance (FTIR), and f

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Noorin, Eftekhar Sadat, Shahzad Feizi, and Shahram Moradi Dehaghi. "Dosimetric characterization of novel polycarbonate/porphyrin film dosimeters for high dose dosimetry: study on complexation effect." Radiochimica Acta 106, no. 8 (2018): 695–702. http://dx.doi.org/10.1515/ract-2017-2839.

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Abstract Two novel radiochromic films with 20 μm thickness were made from casting of solutions of polycarbonate (PC) containing 0.5 wt.% tetra phenyl porphyrin (TPPH2) and 5,10,15,20-tetraphenyl-21H,23H-porphine iron(III) chloride (Fe-TPP). Dosimetric characterization of the films as routine dosimeters were studied by spectrophotometric method. On subjecting TPPH2/PC and Fe-TPP/PC film dosimeters to gamma radiation, radiolytic bleaching of films was observed. The effects of metal-complexation on the radiation response of the film dosimeters were studied under 60Co γ-rays exposure in dose range

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Olsen, Richard T., John M. Ruter, and Mark W. Rieger. "Photosynthetic Responses of Container-grown Illicium L. Taxa to Sun and Shade." Journal of the American Society for Horticultural Science 127, no. 6 (2002): 919–24. http://dx.doi.org/10.21273/jashs.127.6.919.

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Illiciums, or star-anises, have increased in popularity in the nursery and landscape industries. However, confusion exists as to which taxa are tolerant of high light intensities during production and subsequent establishment in the landscape. We investigated the effect of two light intensity treatments, 45% and 100% full sunlight, on gas-exchange parameters of five Illicium taxa: Illicium anisatum L., I. floridanum Ellis. `Pebblebrook', I. henryi Diels., I. lanceolatum A.C. Sm., and I. parviflorum Michx. Ex. Vent. `Forest Green'. Light-response curves were determined for individual leaves, an

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Thamó-Bozsó, Edit, Gábor Csillag, Judit Füri, Attila Nagy, and Árpád Magyari. "Age of sediments on Danube terraces of the pest plain (Hungary) based on optically stimulated luminescence dating of quartz and feldspar." Geochronometria 47, no. 1 (2020): 171–86. http://dx.doi.org/10.2478/geochr-2020-0021.

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Abstract The numerical ages available for the sediments on the Danube terraces in the Pest Plain are scarce. In this study, we present quartz OSL and K feldspar post-IR IRSL290 ages for the sandy fluvial, aeolian and slope sediments collected from Danube terraces IIb, III and V. The feldspar post-IR IRSL290 ages without residual dose subtraction are older than the quartz OSL ages, except for one sample, but the two sets of ages are overlapping within one or two sigma errors. In the bleaching experiment under natural sunlight during summer, an unbleachable component ranging from 2.5±0.7 Gy to 5

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Koch, Jonathan B., Byron Love, Ellen Klinger, and James P. Strange. "The effect of photobleaching on bee (Hymenoptera: Apoidea) setae color and its implications for studying aging and behavior." Journal of Melittology, no. 38 (August 26, 2014): 1. http://dx.doi.org/10.17161/jom.v0i38.4737.

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Historically, bee age has been estimated using measurements of wing wear and integument color change. These measurements have been useful in studies of foraging ecology and plant-pollinator interactions. Wing wear is speculated to be affected by the behaviors associated with foraging, nesting, and mating activities. Setal color change may be an additional parameter used to measure bee age if it is affected by sun exposure during these same activities. The objectives of this study were to experimentally assess the effect of direct sun exposure on setal color, unicellular hair-like processes of

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Schmidt, Christoph, Théo Halter, Paul R. Hanson, et al. "Zircon luminescence dating revisited." Geochronology 6, no. 4 (2024): 665–82. https://doi.org/10.5194/gchron-6-665-2024.

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Abstract. Luminescence dating plays a pivotal role in Quaternary science, yet ongoing methodological challenges persist in refining the temporal range, accuracy, and precision of luminescence methods. Our contribution revisits zircons as potential alternative dosimeters to quartz, feldspar, or calcite for routine dating applications. The essential advantage of zircons over other minerals is the time-invariant and high internal dose rate due to high radionuclide contents, dominating over the external contribution, which is more challenging to assess. Reported drawbacks are low zircon abundance,

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Uwaremhevho Momodu, Daniel. "SURFACE FUNCTIONALIZATION OF LINEN FIBER AND ITS DYE-FASTNESS ASSESSMENT USING (4-[(E)-(4-AMINO-2-HYDROXYPHENYL) DIAZENYL] BENZENE- 1-SULPHONIC ACID AND 4-[(E)-(4-{(Z)-[4-(DIMETHYLAMINO) PHENYL] DIAZENYL}-2-HYDROXYPHENYL) DIAZENYL] BENZENE-1-SULPHONIC ACI." Suranaree Journal of Science and Technology 30, no. 3 (2023): 030118(1–9). http://dx.doi.org/10.55766/sujst-2023-03-e03039.

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Textile fibres find application in many fields, such as; Apparel manufacturing, Medical, Agriculture, Packaging, Civil construction, Shipping. Some of these fibres lack special characteristics required for some specific application without any additional treatment. Large scale production of linen fibre has been limited by the tendency of the fibre to absorb water, degradation by micro-organisms and sunlight. These factors ultimately lower the strength and the service life of the fibre. Hence, the need to improve the hydrophobicity of natural linen fibre before application. Poor dye-fibre inter

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Fatima, Kaneez, Nusrat Masood, and Suaib Luqman. "Quenching of singlet oxygen by natural and synthetic antioxidants and assessment of electronic UV/Visible absorption spectra for alleviating or enhancing the efficacy of photodynamic therapy." Biomedical Research and Therapy 3, no. 02 (2016): 514–27. http://dx.doi.org/10.15419/bmrat.v3i02.82.

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 Photodynamic therapy (PDT) is one of the methods involved in cancer therapy exploiting singlet oxygen as a weapon to kill cancer cells. Singlet oxygen, a bizarre reactive oxygen species as it is not related to electron transfer to O2 but it is one of the most active intermediate involved in biochemical reactions as it directly reacts with all the major macromolecules like DNA, protein, lipids etc, various photosensitized oxidations and in the photodegradation of dyes and polymers. Recent studies about the usage of antioxidant along with the photo-sensitizer involved in photodynamic ther

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Panigrahi, Sonia, Sandeep Rout, Gyanaranjan Sahoo, Sachin Gupta, and V. S. Kishan Kumar. "Finishing Properties of Poly Urethane Coating on Bleached and Ammonia Fumigated Mango Wood Surface." International Journal of Plant & Soil Science, July 5, 2021, 57–67. http://dx.doi.org/10.9734/ijpss/2021/v33i1630523.

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Aims: The impact of bleaching chemicals on the gloss and film thicknesses of poly urethane (PU) coated surface of mango wood (Mangifera indica) with ammonia fumigation and an exposure towards sunlight was investigated Study Design: Thirty six wood samples of size 10.6 cm (length) C 7.62 cm (width) were prepared from 2.5 cm thick kiln dried mango wood (Mangifera indica). Specimens were divided into six groups, each group having 6 samples for the study. Place and Duration of Study: The experiment was carried out in year 2016 at the Laboratory of Forest Product Division, Forest Resear

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Pawlak, N.K., A. Timar-Gabor, and A. Chruścińska. "RESIDUAL HOLE CONCENTRATION IN RECOMBINATION CENTRES AFTER BLEACHING." December 6, 2021. https://doi.org/10.5281/zenodo.5820225.

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Trapped charge dating method using electron spin resonance (ESR) of quartz is progressively used for sediment dating. ESR signals can be used for accurate age estimation only when these signals are zeroed by sunlight exposure before the layer creation or when one knows their ESR residual level (the part of the signal that is not bleached). It is well known that the ESR signal related to the Al-hole centres in quartz used for sediment dating has a significant residual signal. From the point of view of luminescence models, as a hole trap, the Al-hole centre is considered as a recombination centr

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