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Relevant bibliographies by topics / Photodestruction

Academic literature on the topic 'Photodestruction'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Dissertations / Theses
Book chapters
Conference papers

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Journal articles on the topic "Photodestruction"

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CZÉAGÉA, JÓAZSEF, and LOU REINISCH. "PHOTODESTRUCTION OF BACTERIORHODOPSIN." Photochemistry and Photobiology 53, no. 5 (May 1991): 659–66. http://dx.doi.org/10.1111/j.1751-1097.1991.tb08494.x.

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Yandidova, O. V., V. V. Lemanov, and B. V. Sukharev. "Photodestruction of LiNbO3:Fe crystals." Ferroelectrics Letters Section 7, no. 6 (September 1987): 157–61. http://dx.doi.org/10.1080/07315178708200545.

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Allain, T., E. Sedlmayr, and S. Leach. "Formation and photodestruction of pahs." Astrophysics and Space Science 224, no. 1-2 (February 1995): 417–18. http://dx.doi.org/10.1007/bf00667884.

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Melø, T. B., G. Reisaeter, A. Johnsson, and M. Johnsson. "Photodestruction of Propionibacterium acnes Porphyrins." Zeitschrift für Naturforschung C 40, no. 1-2 (February 1, 1985): 125–28. http://dx.doi.org/10.1515/znc-1985-1-224.

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Abstract The fluorescence spectra of colonies of Propionibacterium acnes were studied under various experimental conditions. The spectra contained peaks at 580 nm and 620 nm. These bands were due to two different components; the 580 nm component was likely to be a metalloporphyrin, and there are indications that the 620 nm component could be a coproporphyrin. The 580 nm fluorescence was destroyed by the combined action of light and oxygen (no destruction under strict anaerobic conditions). A dark period interrupting the bleaching light stopped the destruction of this component for the time of the dark period. The initial production of the 620 nm component was due to the oxygen exposure. Upon light irradiation this component was later destroyed by the combined action of oxygen and light.

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Lelekov, A. S., A. B. Borovkov, T. M. Novikova, I. N. Gudvilovich, A. L. Avsiyan, and O. A. Memetshayeva. "Modeling the Dynamics of Pigment Content in Cells of Dunaliella Salina Teod. Unicellular Alga at the Stage of Carotenogenesis." Mathematical Biology and Bioinformatics 14, no. 1 (May 29, 2019): 279–89. http://dx.doi.org/10.17537/2019.14.279.

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The work is focused on modeling of chlorophyll and carotenoids content dynamics in the in cells of the unicellular algae D. salina, living in salt water, at carotenogenesis induction phase. A mathematical model of pigments content in microalgae cells, which experience excess of light energy and the limit of nutrient medium mineral components, is proposed. The model is based on assumption, that observed rate of variation in pigment concentration is an algebraic sum of the rates of synthesis, photodestruction and partial recovery of photo-oxidized pigments. The rate of secondary carotenoids synthesis does not depend on external conditions and is determined by the quantity of key enzyme complex and its turnover rate. The rate of secondary carotenoids and chlorophyll photodestruction depends on the effective light intensity and is proportional to the amount of absorbed photosynthetically active radiation energy. The verification of the derived equations was conducted in the course of D. salina cultivation at the carotenogenesis stage. The specific rate of chlorophyll a photodestruction was determined, which resulted in 0.12 days–1. The secondary carotenoids concentration increases up to the maximum value, which is determined by the ratio of synthesis and photodestruction specific rates, as well as the maximum culture density. Under conditions of natural light in the Sevastopol region, the maximum concentration of carotenoids was 18.33 mg/l or 0.73 g/m2.

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Romanova, N. A., L. Y. Brovko, L. Moore, E. Pometun, A. P. Savitsky, N. N. Ugarova, and M. W. Griffiths. "Assessment of Photodynamic Destruction of Escherichia coli O157:H7 and Listeria monocytogenes by Using ATP Bioluminescence." Applied and Environmental Microbiology 69, no. 11 (November 2003): 6393–98. http://dx.doi.org/10.1128/aem.69.11.6393-6398.2003.

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ABSTRACT Antimicrobial photodynamic therapy was shown to be effective against a wide range of bacterial cells, as well as for fungi, yeasts, and viruses. It was shown previously that photodestruction of yeast cells treated with photosensitizers resulted in cell destruction and leakage of ATP. Three photosensitizers were used in this study: tetra(N-methyl-4-pyridyl)porphine tetratosylate salt (TMPyP), toluidine blue O (TBO), and methylene blue trihydrate (MB). A microdilution method was used to determine MICs of the photosensitizers against both Escherichia coli O157:H7 and Listeria monocytogenes. To evaluate the effects of photodestruction on E. coli and L. monocytogenes cells, a bioluminescence method for detection of ATP leakage and a colony-forming assay were used. All tested photosensitizers were effective for photodynamic destruction of both bacteria. The effectiveness of photosensitizers (in microgram-per-milliliter equivalents) decreased in the order TBO > MB > TMPyP for both organisms. The MICs were two- to fourfold higher for E. coli O157:H7 than for L. monocytogenes. The primary effects of all of the photosensitizers tested on live bacterial cells were a decrease in intracellular ATP and an increase in extracellular ATP, accompanied by elimination of viable cells from the sample. The time courses of photodestruction and intracellular ATP leakage were different for E. coli and L. monocytogenes. These results show that bioluminescent ATP-metry can be used for investigation of the first stages of bacterial photodestruction.

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Gorbatova, N. Y., T. Y. Yushina, O. O. Sarukhanyan, A. G. Dorofeyev, and A. V. Bryantsev. "Emergency Laser Photodestruction of Benign Vascular Formations of the Skin in Children, Complicated by Bleeding." Russian Sklifosovsky Journal "Emergency Medical Care" 8, no. 1 (April 23, 2019): 35–44. http://dx.doi.org/10.23934/2223-9022-2019-8-1-35-44.

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BACKGROUNDBenign vascular lesions of the skin, hemangiomas and pyogenic granulomas are quite common in pediatric patients, which are complicated with bleeding in 7.5% of cases.MATERIAL AND METHODSIn 2016–2018, 17 children with cavernous hemangiomas and pyogenic granulomas complicated with bleeding were operated on an emergency basis at the Research Institute of Emergency Children’s Surgery and Traumatology. Surgical intervention for all patients was performed using the method of interstitial selective laser photodestruction developed by the RIECST, which took out the utility patent. This method was implemented using two wave laser surgical device IPG “IRE-Polus” (Russia), generating two wavelengths of laser radiation of 0.97 μm and 1.56 μm.RESULTSThe analysis of the long-term results of treatment in 17 pediatric patients who were operated on an emergency basis for hemangioma and pyogenic granuloma complicated by bleeding showed that all 17 patients (100%) had a good clinical and aesthetic result. The method of interstitial selective laser photodestruction provided a radical removal with guaranteed hemostasis of the indicated benign vascular lesions of the skin complicated with bleeding illustrate the effectiveness of this method in clinical practice, as well as the possibility of its use in inpatient and outpatient conditions.CONCLUSIONTo prevent the large blood loss in hemangiomas complicated by bleeding and pyogenic granulomas of the skin in children, emergency surgical treatment has been performed using interstitial selective laser photodestruction. This method ensures the radical photodestruction of tissues of a pathological vascular formation and reliable hemostasis, which guarantees the achievement of a good clinical and aesthetic result of treatment in inpatient and outpatient conditions in all cases.

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Masiera, N., A. Bojarska, I. Gawryszewska, and J. Waluk. "Porphycenes as photosensitizers: Photodestruction of bacteria." Photodiagnosis and Photodynamic Therapy 17 (March 2017): A44. http://dx.doi.org/10.1016/j.pdpdt.2017.01.098.

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Cecchi-Pestellini, Cesare, Santi Aiello, and Bruno Barsella. "R V-dependent Interstellar Photodestruction Rates." Astrophysical Journal Supplement Series 100 (September 1995): 187. http://dx.doi.org/10.1086/192215.

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Crovisier, Jacques. "Photodestruction rates for cometary parent molecules." Journal of Geophysical Research 99, E2 (1994): 3777. http://dx.doi.org/10.1029/93je02088.

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Dissertations / Theses on the topic "Photodestruction"

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MATTEI, ANTOINE-ANDRE. "Place de la photodestruction laser dans le traitement des ampullomes benins." Lyon 1, 1993. http://www.theses.fr/1993LYO1M315.

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Hudaya, Tedi Chemical Sciences &amp Engineering Faculty of Engineering UNSW. "Synthesis, characterisation, and activity of novel TiO2-based photocatalysts for organic pollutant photodestruction under UV and visible-light irradiation." Publisher:University of New South Wales. Chemical Sciences & Engineering, 2008. http://handle.unsw.edu.au/1959.4/42612.

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Titania-based photocatalysts have been extensively studied for the oxidative photodestruction of organic pollutants in wastewaters, releasing non-toxic substances such as CO2, HCl, and water. However, commercial exploitation of this process is limited by the fact that titania is only active under UV irradiation (wavelength below about 388 nm), which is only less than 5% of solar light energy. Sol-gel synthesised catalyst specimens were characterised to determine the correlation between preparation conditions on morphology (XRD, SEM), optical (bandgap energy level) and physicochemical properties (BET surface area, pore volume, acid site density, acid site strength and type) of the photocatalysts. These spesific properties would then be linked to their photoactivity using aqueous aliphatic and aromatic model pollutants. This study has demonstrated that sol-gel synthesised doped titania photocatalysts, especially Pt/TiO2, may be used to effectively degrade non-volatile acids (DL-malic acid, dichloroacetic acid, and p-hydroxybenzoic acid) under visible light and UV irradiation with significant photoactivity suitable for the solar light application of photocatalytic wastewater treatment. A significant drop in band-gap energy was found for all titania sol-gel catalysts doped with Pt, Co, and Ce with values between 1.41 to 1.78 eV. The BET areas of the photocatalysts were also higher (65-117 m2/g) than that of Degussa P25 (50 m2/g). The visible-light photomineralisation of the three pollutants with Pt-TiO2 specimen were further extended to evaluate the effects of major variables in a bubble-column photoreactor on the photodegradation activities. Those major variables were lamp intensity, oxygen concentration, initial pH, catalyst dosage, and inital pollutant concentration. All the three pollutants seemed to follow the Langmuir-Hinselwood model with dual adsorption sites which implicated a bimolecular surface rate-limiting step probably between the adsorbed organic substrate and a surface hydroxyl (or peroxy) radical. A study of the CeyCoxTi(1-x)O3+d perovskite was conducted to investigate the influence of metal composition and pH on the intrinsic optophysical attributes as well as p-hydroxybenzoic acid degradation under UV irradiation. The perovskite UV photoactivities were lower than that of pure TiO2 likely due to excessive loading (metal content) creating new oxide phases act as electron-hole recombination center, regardless better physicochemical attributes of some of the perovskite samples. The role of aging time and calcination temperature on the sol-gel synthesised TiO2 was also explored. Higher calcination temperature (from 250 to 700 0C) resulted in TiO2 photocatalysts with better crystallinity, which is important for OH group formation as active sites for photodegradation. Despite of some advantages from higher temperature preparation, some detrimental effects such as decreased acidity attributes, surface area, and pore volume were also observed. The significant red-shift of sol-gel synthesized TiO2 into visible light, especially for 250 0C specimen since 600 or 700 0C had extremely low activities, has promising implications that this specimen might be used for solar application to substitute Pt-doped TiO2 in order to produce a more cost effective photocatalyst. Aging period (1 to 14 days) did not have any discernible effect on the band-gap value and acid-site density. Even so, the highest acid site strength was obtained with an aging time of 10 days. From the overall perspective, aging time longer than 3 days did not bring noticeable benefits to both catalyst attributes and photoactivities.

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Chih, Huang Chien, and 黃建智. "The Mechanisms of Nano-sized TiO2 Photocatalyst Treated by Plasma Surface Modification for Photodestruction of the Volatile Organic Compounds." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/08458367844668952613.

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碩士
中國文化大學
材料科學與製造研究所
92
A visible-light-responsive titanium oxide photocatalyst was prepared by using rf power of 400W in hydrogen (H2) or nitrogen (N2) gas at 400℃. It is demonstrated that an oxygen-deficient structure of commercial TiO2 (ST-01) is successfully produced via this new plasma-heat process. The properties of treated ST-01 were analyzed by means of UV-visible spectrometer, XRD, and BET. After plasma-heat treatment, no obvious changes of crystalline size, anatase structure and specific surface area of ST-01 samples were found. On irradiating with visible light lamp, the photocatalytic results of 2-Propanol (IPA) follow the first-order kinetic model and the apparent first-order rate constant, kapp, showed that the ST-01, after treatment, effectively decompose IPA. The optimum condition of the plasma—heat process was found to be for hot electrode temperature at 400℃ and treatment time at 10 min under N2 flow rate of 10 sccm, working pressure of 30 Pa and rf power of 400W. According to X-ray photoelectron spectroscopy (XPS) data, the values of O/Ti ratio of the raw and H2 、N2 plasma-heated ST-01 were estimated to be 2.0 、 1.81 and 1.96. These results indicate that the oxygen vacancies generated by the plasma-heat process were contributed to the enhancement of photocatalytic activity. However according photocatalytic activity test the N2 plasma-heated ST-01 is better than H2 plasma-heated ST-01 .Moreover, the synergy effect of plasma and heat was ascribed to the heating on ST-01 providing the higher energy for the evacuation of oxygen under plasma treatment.

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Book chapters on the topic "Photodestruction"

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Allain, T., E. Sedlmayr, and S. Leach. "Formation and Photodestruction of Pahs." In Circumstellar Matter 1994, 417–18. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0147-9_73.

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Egorov, S. Yu, and A. A. Krasnovsey. "Participation of Chlorophyll Triplet State and Singlet Molecular Oxygen in Chloroplast Photodestruction." In Research in Photosynthesis, 111–14. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-009-0383-8_25.

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Beitz, James V. "Europium(III) Interaction with a Water-Soluble Complexant: From Speciation to Photodestruction." In Separations of f Elements, 153–64. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-1406-4_11.

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"Photodestruction." In Encyclopedia of Astrobiology, 1868. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_100886.

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"Photodestruction." In Encyclopedia of Astrobiology, 1235. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_2924.

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"Photoregulatory and Photodestructive Processes." In Compendium of Biophysics, 607–34. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119160281.ch30.

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Conference papers on the topic "Photodestruction"

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Vaitkuviene, Aurelija, Zydrunas Stankevicius, Sarunas Skirkevicius, Bronius Bareika, and Valerijus Smilgevicius. "Selective photodestruction in minimally invasive genital surgery." In Europto Biomedical Optics '93, edited by Martin J. C. van Gemert, Rudolf W. Steiner, Lars O. Svaasand, and Hansjoerg Albrecht. SPIE, 1994. http://dx.doi.org/10.1117/12.168017.

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Konkov, O. I., and A. V. Prikhodko. "Photodestruction changes in carbon matrix and Costas array formation." In Lasers for Measurements and Information Transfer 2004. SPIE, 2005. http://dx.doi.org/10.1117/12.610501.

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Belov, Sergei N., Albert I. Vangonen, Olga V. Levina, and Anatoly M. Puhov. "Photodestruction of organic compounds exposed to pulsed VUV irradiation." In ECO4 (The Hague '91), edited by Tommaso Letardi and Lucien D. Laude. SPIE, 1991. http://dx.doi.org/10.1117/12.46963.

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Stranadko, Eugeny P., Oleg K. Skobelkin, Yuri M. Makeev, Nikolai A. Markichev, Michail V. Riabov, Anatoli V. Armitchev, and Mikhail V. Muraviov. "Laser treatment of skin cancer: dissection, photodestruction, and photodynamic therapy." In Photonics China '96, edited by Brij M. Khorana, Junheng Li, and Michail M. Pankratov. SPIE, 1996. http://dx.doi.org/10.1117/12.251933.

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Potter, William R., Stephen N. Joffe, and John A. Parrish. "The Theory Of Photodynamic Therapy Dosimetry: Consequences Of Photodestruction Of Sensitizer." In Cambridge Symposium-Fiber/LASE '86. SPIE, 1987. http://dx.doi.org/10.1117/12.937328.

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Schüle, Georg, Gereon Hüttmann, Johann Roider, Reginald Birngruber, and Ralf Brinkmann. "On-Line control systems for selective photodestruction of the retinal pigment epithelium." In Biomedical Topical Meeting. Washington, D.C.: OSA, 1999. http://dx.doi.org/10.1364/bio.1999.ctue9.

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Mostovnikov, Vasili A., Galina R. Mostovnikova, Vitali Y. Plavski, and Antonina I. Tretjakova. "Primary stage of photodestruction of malignant cells under photodynamic therapy of tumors." In CIS Selected Papers: Laser Use in Oncology, edited by Andrei V. Ivanov and Mishik A. Kazaryan. SPIE, 1996. http://dx.doi.org/10.1117/12.229492.

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Zhdanov, Dmitry V., and Victor N. Zadkov. "Selective photodestruction of chiral molecules of a specified configuration by coherent laser radiation." In The International Conference on Coherent and Nonlinear Optics, edited by Sergey A. Tikhomirov, Thomas Udem, Valery Yudin, Maxim Pshenichnikov, and Oleg M. Sarkisov. SPIE, 2007. http://dx.doi.org/10.1117/12.752436.

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Bahmani, Baharak, Yadir Guerrero, Valentine Vullev, Sheela P. Singh, Vikas Kundra, and Bahman Anvari. "ICG-loaded polymeric nanocapsules functionalized with anti-HER2 for targeted fluorescence imaging and photodestruction of ovarian cancer cells." In SPIE BiOS, edited by Samuel Achilefu and Ramesh Raghavachari. SPIE, 2013. http://dx.doi.org/10.1117/12.2003453.

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Sirotkin, A. A., G. P. Kuzmin, N. E. Gorbatova, T. E. Yushina, A. G. Dorofeev, A. V. Brynsev, S. A. Zolotov, O. V. Tikhonevich, and D. S. Drozdov. "Optimization of selective photodestruction by laser radiation of the yellow-green range of capillary angiodysplasia of the skin." In 2018 International Conference Laser Optics (ICLO). IEEE, 2018. http://dx.doi.org/10.1109/lo.2018.8435420.

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