Academic literature on the topic 'Reactive light'

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Journal articles on the topic "Reactive light"

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SHIBUE, Kazuhisa. "Reactive sintering of light intermetallics." Journal of Japan Institute of Light Metals 44, no. 11 (1994): 614–21. http://dx.doi.org/10.2464/jilm.44.614.

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Szuromi, Phil. "Light frees a reactive thiol." Science 372, no. 6545 (May 27, 2021): 930.7–931. http://dx.doi.org/10.1126/science.372.6545.930-g.

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&NA;. "New light on acute reactive arthritis." Inpharma Weekly &NA;, no. 987 (May 1995): 11. http://dx.doi.org/10.2165/00128413-199509870-00023.

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Huang, Kai Jin, Yu Yao Nie, and Yun Liu. "Visible Light Photocatalytic Degradation of Reactive Deep Blue K-R by BiOI and BiOCl0.2Br0.1I0.7." Applied Mechanics and Materials 217-219 (November 2012): 1186–90. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.1186.

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The visible-light photocatalytic degradation of an azo dye Reactive Deep Blue K-R by BiOI and BiOCl0.2Br0.1I0.7photocatalysts was investigated. When the reaction proceeded for 1 h under the conditions of 15mg/l Reactive Deep Blue K-R solution and PH=3, the visible-light degradation degrees of Reactive Deep Blue K-R were 93% and 52% for BiOCl0.2Br0.1I0.7and BiOI, respectively.Moreover, the photodegradation of Reactive Deep Blue K-R by BiOI and BiOCl0.2Br0.1I0.7followed a first-order reaction kinetic and the values of k for BiOI and BiOCl0.2Br0.1I0.7are 0.911h-1 and 1.981h-1, respectively. BiOCl0.2Br0.1I0.7exhibits better visible-light-responsive photocatalytic performance for photodegradation of Reactive Deep Blue K-R than BiOI due to the smaller particle size, the larger specific surface area and the stronger redox potential of BiOCl0.2Br0.1I0.7.
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Gericke, Karl-Heinz, Christoph Kreher, and Jan Leo Rinnenthal. "Stereocontrol of Reactive Encounters Using Polarized Light." Journal of Physical Chemistry A 101, no. 41 (October 1997): 7530–33. http://dx.doi.org/10.1021/jp971015v.

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Robin, Degrave, Cockx Arnaud, and Schmitz Philippe. "Model of Reactive Transport within a Light Photocatalytic Textile." International Journal of Chemical Reactor Engineering 14, no. 1 (February 1, 2016): 269–81. http://dx.doi.org/10.1515/ijcre-2015-0060.

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AbstractThis paper deals with the 3D-modeling of the reactive transport within a light photocatalytic textile used to decontaminate industrial effluents. The model consists of the coupling of fluid flow governing equations, species convection diffusion equations and a heterogeneous reaction equation. It is solved numerically on a Representative Volume Element (RVE) of the textile, i.e. at the microscopic scale regarding the industrial photocatalytic reactor using Comsol Multiphysics software. In a preliminary approach, the reactive transport model was first applied in a 2D simple geometry to verify its accuracy in terms of mass balance of the species. Then successive simulations using pseudo-periodic boundary conditions were performed in the RVE and the depollution efficiency along the textile length is analysed in terms of pollutant concentration. A sensitivity analysis was done to reveal the relative importance of the kinetic and hydrodynamic parameters in prediction of pollutant concentration fields in the RVE. It was found that a high adsorption rate associated with a low permeable fabric maximizes the amount of treated fluid. Finally the performances of a typical reactor composed of a stack of textiles were investigated. Results show a significant improvement of depollution efficiency of this particular configuration compared to single textiles in parallel.
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Sadrekarimi, Abouzar. "Development of a Light Weight Reactive Powder Concrete." Journal of Advanced Concrete Technology 2, no. 3 (2004): 409–17. http://dx.doi.org/10.3151/jact.2.409.

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Lin, Jiang-Jen, Michael Cuscurida, and Harold G. Waddill. "Reactive Tetramethylpiperidine-Containing Poly(oxypropylenediamines) as Light Stabilizers." Industrial & Engineering Chemistry Research 36, no. 5 (May 1997): 1944–47. http://dx.doi.org/10.1021/ie960521o.

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MILLARD, P. R., E. YOUNG, D. E. HARRISON, and F. WOJNAROWSKA. "Reactive perforating collagenosis: light, ultrastructural and immunohistological studies." Histopathology 10, no. 10 (October 1986): 1047–56. http://dx.doi.org/10.1111/j.1365-2559.1986.tb02541.x.

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Seshadri, S. R. "Reactive power in the full Gaussian light wave." Journal of the Optical Society of America A 26, no. 11 (October 26, 2009): 2427. http://dx.doi.org/10.1364/josaa.26.002427.

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Dissertations / Theses on the topic "Reactive light"

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Myronidi, Despoina. "LIGHT-BEAT: REACTIVE LIGHT FOR THE EMOTIONAL COMFORT OF NEWBORN BABIES." Thesis, KTH, Ljusdesign, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297961.

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This is a project-based thesis focusing on the investigation of topics related to human newborns and the factors found in their surrounding environment that need to be assessed so as to provide them with a feeling comfort. The objective is to boost their emotional development by the means of light in a close relation to sound so as to provide them with a type of intelligence allowing them to normally interact within a society during their adult life, reassuring social equality and eliminating potential social exclusion due to unexpected behaviours. After researching topics to have a better understanding of the newborn baby and its enclosing environment, a luminaire design solution -functioning with a reactive scheme performed with integrated sound sensors- provided further results to the main topic investigation. The conceptual scheme for the product development was inspired by the connection between the newborn and their life-giver, closely linked to the cross-modality of sensory development before and after birth. Additional results were obtained with light measurement assessments and a parent survey targeting both the intended light quality subjective evaluations and the marketing strength of the designed product. This survey was used -along with other means- as a design evaluation tool at the final stage of the design process. Potential further improvements as well as considerations for a distinct spatial application are discussed in the final part of the thesis. The sustainability aspect covered within this degree project is closely linked to good physical and mental health aspects, clean energy use and efficiency achieved by the integration of input sound sensors and controls, and conscious production and consumption by the proposal of low global footprint materials for the luminaire design. In the conclusions, an overall summary of the thesis outcomes is presented and further research is proposed regarding both the main topic investigation as well as a greater user category that can be related to the light metric assessments that were carried out for this research.
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Kiszka, Mariusz. "Spectroscopic characterisation of reactive species generated by light and ionising radiation in low temperature matrices." Thesis, University of Strathclyde, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366952.

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Edwards, Jessica Corinne. "Investigation of Color Removal by Chemical Oxidation for Three Reactive Textile Dyes and Spent Textile Dye Wastewater." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/34091.

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This research investigated the efficacy of chlorine dioxide (ClO2), ultraviolet (UV) irradiation, UV in combination with chlorine dioxide (UV/ClO2), and UV in combination with hydrogen peroxide (UV/H2O2) for decolorizing three reactive azo dyes (sultan red, indigo blue and cypress green) and treated textile-manufacturing wastewater. The objective was to determine the best treatment for reducing color to the Virginia Pollutant Discharge Elimination System (VPDES) permit level of 300 American Dye Manufacturers Institute (ADMI) units. The effects of the three chemical oxidation treatments provided color reduction for all three dyes. The results suggested UV/H2O2 and UV/ClO2 treatments provided maximum color reduction of the red and blue dyes, and UV/H2O2 was the most effective for maximum reduction of the green dye.

A research goal was to provide predictive models of the wastewater effluent for the treatment processes, including the UV exposure time required to reach the 300 ADMI permit value and the effective ClO2 dose necessary to achieve the 300 units. The results of the investigations regarding the effluent indicated that UV/H2O2 and UV/ClO2 (5 mg/L) provided reduction to 300 units in less than 10 minutes UV exposure when the initial effluent color was less than 500 ADMI units. Without the addition of oxidant, contact times longer than 10 minutes were required for UV to decolorize these effluents to 300 ADMI units. Chlorine dioxide dosages between 10 and 30 mg/L both with and without UV irradiation achieved the same results.
Master of Science

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Fergusson, Stanley MacArthur, and mac fergusson@rmit edu au. "The Effect of Laundry Detergents and Residual Alkali on the Light Fastness of Reactive Dyes on 100% Cotton." RMIT University. Fashion and Textiles, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20081128.162252.

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This study presents findings on the effect of domestic laundry detergents on the fastness to light of selected fibre reactive dyes applied to cotton. The study was carried out to elucidate the reasons for the accelerated colour loss of cotton garments washed under Australian domestic laundering conditions. Cotton fabric dyed with commonly used reactive dyes were laundered with water only, several domestic detergents and a laboratory formulated neutral detergent, and then exposed to light for two hours in the wet state. Quantities of detergent used were in accordance with the manufacturers recommendations. Exposures were repeated fifteen times equivalent to 30 hours exposure. Colour loss and colour difference were measured after 5, 10 and 15 wash cycles and 10, 20 and 30 hours exposure. When the fabric was exposed wet the colour faded more rapidly than when exposed dry to light. Detergents increased the colour loss even when the fabric was not exposed to light. The presence of an oxidizing bleach (sodium perborate) in the detergent increased colour loss during washing and wet exposure to light. Ultraviolet radiation from the light source, heat, moisture, alkali and oxidising bleach during exposure resulted in hydrolysis of the dye-fibre bond causing dye desorption during washing and rinsing. Water alone increased the fading of the dyes most likely due to presence of dissolved oxygen held within the fibre. The combination of ultraviolet radiation and oxidizing bleaches altered the chemistry of the dye and hence its shade. This was particularly evident on the black dye and one of the navy blue dyes.
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Teale, Carson(Carson Arthur). "In-situ depth monitoring for a deep reactive ion etcher using a white light interferometer with active vibration cancellation." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/121726.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2019
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 119-121).
Standard process development for micro and nanofabrication etching technologies relies on open-loop trial and error testing of recipes to achieve optimal etch depths and uniformities. This strategy is inefficient for research and fabrication of novel devices where one-of-a-kind experiments cannot justify lengthy process development times. This thesis describes the development of an in-situ depth measurement device for real-time feedback of etch depth and uniformity. This device will help facilitate far shorter process development times, potentially enabling the desired etch to be achieved on the first process run. The depth imager consists of a wide-field, white light interferometer with a 12" working distance, capable of imaging across a 1/2" field of view. Active feedback from a co-propagating laser interferometer is used to stabilize the system against vibrations through a feedback loop that controls the position of the reference mirror using a piezo actuator. This scheme ties the accuracy of the white light depth scan to the stability of the laser wavelength, allowing for accurate step sizes without the need for an expensive scanning stage. The well defined sampling period allows for the phase sensitive detection of the white light interference signal, reducing amplitude fluctuations from plasma emissions. This design is able to image deep trenches with optically rough surfaces, etched directly into a silicon substrate with aspect ratios of 10 or more. The device is demonstrated on a custom built deep reactive ion etcher (DRIE), achieving a depth resolution of better than 1 [mu]m in the presence of large vibrations.
by Carson Teale.
Ph. D.
Ph.D. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
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Lumbala, Jenny Chansa. "Synthesis and characterisation of Au/TiO2 composites for plasmon-enhanced visible light driven photocatalytic degradation of reactive orange 16 dye." Thesis, Cape Peninsula University of Technology, 2019. http://hdl.handle.net/20.500.11838/2984.

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Thesis (Master of Applied Science in Chemistry)--Cape Peninsula University of Technology, 2019
Photocatalysis is one of the methods that have gained popularity for degradation of organic pollutants in water. Metal oxides, such as ZnO, Fe2O3, and TiO2 are considered to be good and efficient photocatalysts. TiO2, in particular, has been the most investigated because it is naturally abundant, non-toxic and stable. However, the wide band gap of TiO2 (3.2 eV), make TiO2 only to absorb UV light. For this reason, plasmon enhanced-photocatalysis has emerged as one of the appealing processes to achieve visible light utilization by TiO2. This process exploits the Localized Surface Plasmon Resonance (LSPR) of the metal nanoparticles such as gold to harvest the visible light and bring about photocatalytic process. LSPR is the effect of the oscillation of electrons in noble metals when they are in contact with light. Due to the LSPR phenomena, noble metals are able to increase the lifetime of the charge carriers and increase electron/hole generation semiconductors photocatalysts under visible light. In this study, TiO2 was coupled with gold nanoparticles in order to facilitate visible light absorption and to improve the photocatalytic performance. Gold nanoparticles (nanospheres and nanorods) were synthesised using the Turkivich and seed mediated methods. These were characterised by UV-visible spectrophotometry, transmission electron microscopy (TEM) and scanning electron microscopy (SEM) for optical properties, size and morphology. The concentration of the as prepared gold samples was measured using the inductively coupled plasma optical emission spectrometry (ICP-OES). Gold nanospheres and gold nanorods were loaded into TiO2 using the nucleation and growth method to obtain the Au/TiO2 plasmonic composites. To investigate to effect of the gold size, two AuNRs samples with different aspect ratios (1.9 and 3.4) were prepared and used to form the nanocomposites with TiO2. Another Au/TiO2 composite sample was prepared by loading AuNS to compare the behaviour of the two shapes. The characterisation results of these samples from the transmission electron microscopy TEM and SEM confirmed the expected shapes (spheres and rods) and the formation of the nanocomposites. The energy dispersive spectroscopy (EDS) results showed the presence of the all the expected elements in the composites materials, further confirming the successful synthesis of the Au/TiO2 composites. The absorption spectra of the prepared nanocomposites showed the plasmonic peaks of the gold nanoparticles in the visible region, which also confirmed the formation of the composite materials. The photocatalytic performance of the photocatalysts was investigated for the degradation of reactive orange 16. From the results obtained in this study, it was found that the photocatalysts loaded with AuNRs gave higher photodegradation efficiencies compared to the one loaded with AuNS. The photocatalytic efficiency was found to increase with an increase on the aspect ratio of the AuNRs. For AuNRs (1.9) the achieved efficiency was 84.56 % and 86.65 % for AuNRs (3.4). Meanwhile, direct photolysis did not have an effect on the photodegradation of Reactive Orange 16 (RO 16). The combined effect of AuNRs and AuNS showed a drastic improvement on the photocatalytic efficiency and the rates of the process which was attributed to the synergistic effects of the transverse and the longitudinal plasmons peaks of both nanospheres and nanorods. The photocatalyst prepared with the mixed nanospheres and nanorods gave an efficiency of up to 90.15 % for the 1:1 ratio at 60 min reaction time. A number of reaction parameters were investigated for their effect on the photodegradation efficiency including: pH, Au content, and temperature. The photocatalytic degradation of RO 16 was very slow in very acidic (pH 2.5) and very basic conditions (pH 11.5). The highest degradation efficiency was achieved at pH of about 6.7. Furthermore, the rate of degradation also increased with an increase in temperature from 15 oC to 30 oC due to the reduction of the activation energy. The increase in Au loading from 0.1 wt % to 0.2 wt % increased the photocatalytic performance of the catalyst from 56.29 % to 86.65 %. However, further increase in gold loading blocked the light penetration and hence, caused a decrease on the efficiency to 66.35 %.
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Gatlin, DeVonna M. M. S. "Characterization and Photodynamics of Reactive Intermediates for Various Carbonyl-Based Systems: Alkyl Azides, Vinyl Azides, and Beta-Ketoester Moieties." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535380770508755.

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Matheus, Luiz Eduardo Mendes. "DYRP-VLC: a dynamic routing protocol for visible light communication networks." Universidade Federal de Juiz de Fora (UFJF), 2018. https://repositorio.ufjf.br/jspui/handle/ufjf/8076.

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Na última década, o interesse (acadêmico e comercial) em torno da Comunicação por Luz Visível (VLC) aumentou consideravelmente, devido a fatores como a crescente demanda por recursos sem fio na Internet e às vantagens oferecidas pela transmissão de dados através da luz visível. Entretanto, a utilização da luz como meio de comunicação, principalmente em ambientes internos, oferece diversos desafios, como interferência e bloqueios criados por obstáculos. Ao mesmo tempo, este tipo de ambiente oferece uma rica infraestrutura de fontes de luz, que podem ser utilizadas para auxiliar na comunicação através de mecanismos multi-hop. A maioria dos trabalhos presentes na literatura adotam técnicas simples para construção de mecanismos multi-hop em redes VLC, focando principalmente em aumento de distância. Neste trabalho, foi desenvolvido um protocolo de roteamento dinâmico, DYRP-VLC (DynamicRoutingProtocolforVisibleLightCommunication),quetemcomoobjetivo aumentar o desempenho de sistemas VLC em ambientes dinâmicos, enquanto reage à obstáculos construindo rotas alternativas na rede. A avaliação do protocolo foi realizada em um ambiente real, utilizando a plataforma embarcada OpenVLC 1.0 e métricas adotadas para problemas de roteamento. Os resultados obtidos mostram que, usando o DYRP-VLC, a rede foi capaz de se adaptar a mudanças dinâmicas na comunicação, como sombras e obstáculos, com pouca sobrecarga.
In the last decade, the interest in Visible Light Communication (VLC) has increased considerably, from both academic and commercial perspectives, due to factors such as the growing demand for wireless resources and the advantages offered by the transmission of data through visible light. However, the use of light as a communication medium, especially in indoor environments, offers several challenges, which includes shadowing and interference caused by obstacles. At the same time, this type of environment offers a rich infrastructure of light sources, which can be used to aid communication through multi-hop mechanisms. Most of the works present in the literature adopt simple techniques to construct multi-hop mechanisms in VLC networks, focusing mainly on increasing distance. Inthisthesis,wedevelopedDYRP-VLC(DynamicRoutingProtocolforVisibleLight Communication), a reactive routing protocol which aims to increase the performance ofVLCsystemsindynamicenvironments,whilereactingtoobstaclesbyconstructing alternative routes in the network. The evaluation of the protocol was performed in a real environment, using OpenVLC 1.0 embedded platform and adopting metrics for routing problems. The results show that, by using DYRP-VLC, the network was able to adapt to dynamic changes in communication, such as shadows and obstacles, with low overhead.
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Neukermans, Jenny. "Interactions between light, CO2 and oxidative stress in Arabidopsis." Thesis, Paris 11, 2012. http://www.theses.fr/2012PA112054.

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Au cours de l’évolution, les plantes ont développé des mécanismes pour percevoir et s'adapter aux conditions de stress. Les formes actives de l'oxygène (FAO) sont des facteurs importants de l'état redox cellulaire et sont impliquées dans ces réponses. Le peroxyde d'hydrogène (H2O2), une FAO majeure des voies de signalisation oxydative, peut être produit rapidement dans la photorespiration. Chez Arabidopsis, le H2O2 produit dans la photorespiration est métabolisé notamment par la CATALASE2 (CAT2). Dans le contexte du mutant cat2 déficient pour cette catalase, les réponses au stress oxydatif induit par la production conditionnelle du H2O2 sont fortement dépendante de la photopériode. En particulier, la formation de lésions, accompagnée de réponses similaires à celles d' attaques pathogènes, sont spécifiques des conditions de culture en jours longs (JL). Ces effets ne sont pas observés en jours courts (JC) malgré un stress oxydant qui semble être aussi prononcé qu’en JL. Une approche transcriptomique globale a été utilisée pour explorer les patterns d’expression génique associées à ces effets. Elle a permis de mettre en évidence des interactions entre photopériode et H2O2 ou entre photopériode et CO2. En particulier, la majorité des gènes répondant à l' H2O2 dans le mutant cat2 sont induits lorsque les plantes sont cultivées en JC alors que un plus petit nombre sont induits par l’ H2O2 spécifiquement en JL. De façon générale, ces analyses ont mis en évidence des relations étroites entre les ressources carbonées, la lumière et l'état redox cellulaire dans les réponses aux changements environnementaux. Un gène induit par le H2O2 spécifiquement en JL, l’AZELAIC ACID INDUCED 1 (AZI1), a été sélectionné pour des analyses fonctionnelles à l’aide d’approches génétique, biochimique et transcriptomique. L’analyse de mutants cat2 azi1 a révélé que AZI1 ne semble pas jouer un rôle majeur dans les réponses des plantes à un stress oxydatif durable. Cependant, ce gène semble jouer un rôle important lorsque le stress oxydatif est déclenchée de façon abrupte par le transfert des plantes de conditions de culture en fort CO2 vers l'air ambiant. De plus, cette étude montre que la communication de feuille à feuille est impliquée dans la régulation de l'expansion de la mort cellulaire en réponse a l'H2O2 issue de la photorespiration. Dans la régulation de l'expansion des lésions, nous proposons que AZI1 agirait d'une part localement pour induire la mort cellulaire et d'autre en inhibant la mort cellulaire d'une façon systémique. Dans des fonds génétiques sauvage Col-0 ou mutant cat2, l’analyse comparative de mutants d'insertion ADN-T pour les principaux photochromes (phyA , phyB) et cryptochromes (cry1, cry2) a permis d'étudier les interactions entre les stress et les fonctions des photorécepteurs. Il est apparu que, la mutation des gènes PHY comme CRY conduit a une stimulation de l’accumulation de glutathion H2O2 dépendante. En revanche, dans le fond génétique cat2 contrairement à la perte des fonctions PHY, la mutation des gènes cry conduit a une modulation du profil transcritomique induit par l’ H2O2. De plus, un criblage de conditions de stress sur les simples mutants cry a révélé une plus forte sensibilité de ces génotypes au stress osmotique, a l’ H2O2 et au paraquat. Globalement, ces données indiquent que l’ensemble des photorécepteurs et plus particulièrement les cryptochromes peuvent jouer un rôle dans la réponse à l’ H2O2 intracellulaire suggérant ainsi l’existence d’un réseau complexe permettant l’intégration de conditions environnementales et la détermination de réponses appropriées au stress
During evolution, plants have developed mechanisms to perceive and respond to stress conditions. Reactive oxygen species (ROS) are important components of cell redox state that have been implicated in these responses. H2O2, an important ROS molecule in oxidative signalling, can be produced rapidly in photorespiration. In Arabidopsis, photorespiratory H2O2 is notably metabolized by CATALASE2 (CAT2). Responses to oxidative stress induced conditionally by photorespiratory H2O2 in the catalase-deficient mutant, cat2, are highly determined by growth daylength. In particular, lesion formation, accompanied by induction of a range of pathogenesis responses, is specific to the long day (LD) photoperiod: these responses are not observed in short days (SD), even though oxidative stress seems to be as marked as in LD. A whole-genome transcriptomics approach was used to explore gene expression patterns underlying these effects, and identified interactions between daylength and H2O2 and between daylength and CO2. In particular, the majority of H2O2-responsive genes in cat2 were up-regulated more strongly in SD air, though a subset of H2O2-induced genes showed a LD-specific response. Overall, this analysis indicates close networking between carbon status, light, and redox state in environmental responses. The most strongly H2O2-induced gene in LD was azelaic acid induced 1 (AZI1) and this gene was chosen for functional analysis using a genetic, biochemical and transcript profiling approach. Analysis of cat2 azi1 mutants revealed that AZI1 does not seem to play an important role in the plant response to sustained, continuous oxidative stress, but is influential when oxidative stress is abruptly induced, in this case, by transferring plants from high CO2 to air. Moreover, this study provided evidence that leaf-to-leaf communication is involved in regulating cell death spread in response to photorespiratory H2O2. In the regulation of this lesion spread, it is proposed that AZI1 acts both locally to promote cell death as well as systemically to inhibit it. Using a comparative analysis of T-DNA insertion mutants for the major phytochromes (phyA, phyB) and cryptochromes (cry1, cry2) introduced into the Col-0 or cat2 background, interactions between stress and photoreceptor function were analyzed. A stimulatory effect of both phy and cry mutations on H2O2-triggered glutathione accumulation was apparent. In contrast to loss of PHY function, both cry mutations modulated daylength-dependent H2O2-triggered transcriptome profiles in cat2. In addition, stress screening of single cry mutants revealed effects on osmotic, H2O2 and paraquat sensitivity. Overall, these data show that both kinds of photoreceptor, but particularly cryptochromes, can play a role in the response to intracellular H2O2, suggesting that there is an intricate network allowing integration of environmental information to determine appropriate responses to stress
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Messenger, David James. "Impact of UV light on the plant cell wall, methane emissions and ROS production." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/4347.

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This study presents the first attempt to combine the fields of ultraviolet (UV) photobiology, plant cell wall biochemistry, aerobic methane production and reactive oxygen species (ROS) mechanisms to investigate the effect of UV radiation on vegetation foliage. Following reports of a 17% increase in decomposition rates in oak (Quercus robur) due to increased UV, which were later ascribed to changes in cell wall carbohydrate extractability, this study investigated the effects of decreased UV levels on ash (Fraxinus excelsior), a fast-growing deciduous tree species. A field experiment was set up in Surrey, UK, with ash seedlings growing under polytunnels made of plastics chosen for the selective transmission of either all UV wavelengths, UV-A only, or no UV. In a subsequent field decomposition experiment on end-of-season leaves, a significant increase of 10% in decomposition rate was found after one year due to removal of UV-B. However, no significant changes in cell wall composition were found, and a sequential extraction of carbohydrate with different extractants suggested no effects of the UV treatments on cell wall structure. Meanwhile, the first observations of aerobic production of methane from vegetation were reported. Pectin, a key cell wall polysaccharide, was identified as a putative source of methane, but no mechanism was suggested for this production. This study therefore tested the effect of UV irradiation on methane emissions from pectin. A linear response of methane emissions against UV irradiation was found. UV-irradiation of de-esterified pectin produced no methane, demonstrating esters (probably methyl esters) to be the source of the observed methane. Addition of ROS-scavengers significantly decreased emissions from pectin, while addition of ROS without UV produced large quantities of methane. Therefore, this study proposes that UV light is generating ROS which are then attacking methyl esters to create methane. The study also demonstrates that this mechanism has the potential to generate several types of methyl halides. These findings may have implications for the global methane budget. In an attempt to demonstrate ROS generation in vivo by UV irradiation, radio-labelling techniques were developed to detect the presence of oxo groups, a product of carbohydrate attack by ROS. Using NaB3H4, the polysaccharides of ash leaflets from the field experiment were radio-labelled, but did not show any significant decrease in oxo groups due to UV treatments. However, UV-irradiation of lettuce leaves showed a significant increase in radio-labelling, suggesting increased UV irradiation caused an increase in the production of ROS. The study shows that the use of this radio-labelling technique has the potential to detect changes in ROS production due to changes in UV levels and could be used to demonstrate a link between ROS levels and methane emissions.
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Books on the topic "Reactive light"

1

York, Rebecca. Chain reaction. Toronto: Harlequin, 2006.

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Indian women from darkness to light: Stories of oppression, exploitation, reaction, resistance, and choice. Calcutta: Parumita Publications, 2000.

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Mireille, Raccurt, ed. PCR/RT-PCR in situ light and electron microscopy. Boca Raton, Fla: CRC Press, 2003.

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Light scattering detectors for size exclusion chromatography: Assessment and applications in reactive processing. Ottawa: National Library of Canada = Bibliothèque nationale du Canada, 1991.

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Advanced Materials for Energy Conversion II: Proceedings of a Symposium Sponsered by the Reactive Metals Committee of the Light Metals Division (LMD) of TMS (The Minerals, Metals and Materials So. Minerals, Metals, & Materials Society, 2004.

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Fong, Francis K. Light Reaction Path of Photosynthesis. Springer, 2011.

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Light, Molecules, Reaction and Health. Elsevier, 2020. http://dx.doi.org/10.1016/c2016-0-01959-9.

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Mittal, Sajjan. Amyloidosis. Edited by Patrick Davey and David Sprigings. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780199568741.003.0181.

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Amyloidosis is a multisystem disease caused by the extracellular deposition of insoluble abnormal fibrils that injure tissues and organs. The fibrils are formed by the aggregation of misfolded, normally soluble proteins. Systemic amyloid light-chain (AL) amyloidosis (primary amyloidosis) is the commonest type of amyloidosis in the developed world, accounting for 80% of cases. The remainder are due to AA amyloidosis (secondary or reactive amyloidosis), familial amyloidosis, or other rare types of amyloidosis. The most common clinical features at diagnosis are nephrotic syndrome, heart failure (typically with predominant right heart failure), sensorimotor and/or autonomic peripheral neuropathy, and hepatosplenomegaly.
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Dark Matters: Nature's Reaction to Light Pollution. Red Deer Press, 2017.

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C, Liddell KNona, Bautista Renato G, Orth R. J, TMS Reactive Metals Committee., and Materials Week '94 (1994 : Rosemont, Ill.), eds. Metals and materials waste reduction, recovery and remediation: Proceedings of a symposium organized by the Reactive Metals Committee of the Light Metals Division of TMS held during Materials Week, October 3-6, 1994, in Rosemont, Illinois. Warrendale, Pa: Minerals, Metals & Materials Society, 1994.

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Book chapters on the topic "Reactive light"

1

Chmela, Š., and P. Hrdlovič. "Reactive Oligomeric Light Stabilizers." In Advances in Chemistry, 473–82. Washington, DC: American Chemical Society, 1996. http://dx.doi.org/10.1021/ba-1996-0249.ch030.

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Ringelberg, Joop. "Light-Induced, Reactive Swimming." In Diel Vertical Migration of Zooplankton in Lakes and Oceans, 25–48. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-3093-1_3.

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Bick, A., and Th Dorfmüller. "A Light Scattering Study of Epoxy Resin Polymerization." In Reactive and Flexible Molecules in Liquids, 389–98. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1043-0_19.

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Versmold, H., and T. Palberg. "Electrophoretic Light Scattering Revisited: The Role of Electro-Osmosis." In Reactive and Flexible Molecules in Liquids, 439–53. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-1043-0_22.

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Hietanen, Eino. "Reactive Oxygen Species and Other Mediators of Phototoxic Damage." In Light in Biology and Medicine, 273–79. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-0709-9_37.

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de Jager, T. L., A. E. Cockrell, and S. S. Du Plessis. "Ultraviolet Light Induced Generation of Reactive Oxygen Species." In Advances in Experimental Medicine and Biology, 15–23. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56017-5_2.

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Landgraf, Peter, Maria Doege, Erich Ohmann, and Henning Tschiersch. "Light Stress and Reactive Oxygen Species: Consequences for Photosynthesis in Euglena Gracilis." In Photosynthesis: from Light to Biosphere, 3429–32. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-009-0173-5_807.

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Scholz, Peter. "A light-weight formalism for the specification of reactive systems." In SOFSEM'96: Theory and Practice of Informatics, 425–32. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/bfb0037426.

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Arachchige, Shamindri M., and Karen J. Brewer. "Mixed-Metal Supramolecular Complexes Coupling Polyazine Light Absorbers and Reactive Metal Centers." In Macromolecules Containing Metal and Metal-Like Elements, 295–368. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2009. http://dx.doi.org/10.1002/9780470527085.ch7.

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Jou, Mei-Jie, Shuo-Bin Jou, Mei-Jin Guo, Hong-Yueh Wu, and Tsung-I. Peng. "Mitochondrial Reactive Oxygen Species Generation and Calcium Increase Induced by Visible Light in Astrocytes." In Mitochondrial Pathogenesis, 45–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-41088-2_5.

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Conference papers on the topic "Reactive light"

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Hymavathi, B., B. Rajesh Kumar, and T. Subba Rao. "Studies on optoelectronic properties of DC reactive magnetron sputtered chromium doped CdO thin films." In LIGHT AND ITS INTERACTIONS WITH MATTER. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4898222.

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Kumar, B. Rajesh, and T. Subba Rao. "Structural and optical properties of DC reactive magnetron sputtered zinc aluminum oxide thin films." In LIGHT AND ITS INTERACTIONS WITH MATTER. AIP Publishing LLC, 2014. http://dx.doi.org/10.1063/1.4898229.

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Stoev, Petar, and Angel Pachamanov. "Dimming of street lighting systems with current reactive energy control." In 2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior). IEEE, 2019. http://dx.doi.org/10.1109/blj.2019.8883555.

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Olthof, Selina. "Reactive interfaces: perovskite degradation at metal-oxide interfaces probed by photoelectron spectroscopy." In Organic and Hybrid Light Emitting Materials and Devices XXV, edited by Tae-Woo Lee, Franky So, and Chihaya Adachi. SPIE, 2021. http://dx.doi.org/10.1117/12.2595286.

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Hsiao, Ching-Lien, Elena Alexandra Serban, Justinas Palisaitis, Muhammad Junaid, Lars Hultman, Per O. Å. Persson, and Jens Birch. "Self-assembled and selective-area growth of GaN nanorods by liquid-target reactive magnetron sputter epitaxy (Conference Presentation)." In Light-Emitting Devices, Materials, and Applications XXIV, edited by Martin Strassburg, Jong Kyu Kim, and Michael R. Krames. SPIE, 2020. http://dx.doi.org/10.1117/12.2550015.

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Kleiber, P. D., A. M. Lyyra, K. M. Sando, V. Zafiropulos, and W. C. Stwalley. "Dynamics of reactive collisions by far wing laser light scattering." In AIP Conference Proceedings Volume 146. AIP, 1986. http://dx.doi.org/10.1063/1.35935.

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OKUYAMA, Masanori, Kohji INOUE, Masanori MICHIMORI, and Yoshihiro HAMAKAWA. "SiO2 Photo-CVD Using Reactive Oxygen by Double Light Excitation." In 1985 Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 1985. http://dx.doi.org/10.7567/ssdm.1985.a-3-7.

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Chen, Aaron Chi-Hao, Ying-Ying Huang, Praveen R. Arany, and Michael R. Hamblin. "Role of reactive oxygen species in low level light therapy." In SPIE BiOS: Biomedical Optics, edited by Michael R. Hamblin, Ronald W. Waynant, and Juanita Anders. SPIE, 2009. http://dx.doi.org/10.1117/12.814890.

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Zeng, Wei-Yin, Tsung-Cheng Chen, Hui-Ling Liu, Yu-Ping Chen, and Chia-Ming Yang. "Thin silicon light-addressable potentiometric sensor by Deep reactive-ion etching." In 2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS). IEEE, 2017. http://dx.doi.org/10.1109/transducers.2017.7994353.

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Macrae, Michael X., Steven Blake, Thomas Mayer, Michael Mayer, and Jerry Yang. "Reactive derivatives of gramicidin enable light- and ion-modulated ion channels." In SPIE NanoScience + Engineering, edited by Manijeh Razeghi and Hooman Mohseni. SPIE, 2009. http://dx.doi.org/10.1117/12.827686.

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Reports on the topic "Reactive light"

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Suzuki, Tsuyoshi, Takaki Itaya, Daisuke Kadowaki, Koji Yoshida, and Hideo Shoji. Combustion Analysis of Preflame Reaction Light Emission Behavior by Using Light Emission Measurement. Warrendale, PA: SAE International, September 2005. http://dx.doi.org/10.4271/2005-08-0514.

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Weber, S., J. R. Norris, T. Berthold, E. Ohmes, G. Kothe, and M. C. Thurnauer. Nuclear coherences in photosynthetic reaction centers following light excitation. Office of Scientific and Technical Information (OSTI), July 1997. http://dx.doi.org/10.2172/515524.

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Okayasu, Yuichi. Spectroscopic study of light Lambda hypernuclei via the (e,e'K+) reaction. Office of Scientific and Technical Information (OSTI), September 2008. http://dx.doi.org/10.2172/956075.

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Doyle, Barney L. Development of eXternal Nuclear Reaction Analysis (XNRA) Detection Technique for Quantifying Light Isotope Concentrations. Office of Scientific and Technical Information (OSTI), October 2019. http://dx.doi.org/10.2172/1571550.

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Klengel, Susanne. Pandemic Avant-Garde Urban Coexistence in Mário de Andrade’s Pauliceia Desvairada (1922) after the Spanish Flu. Maria Sibylla Merian Centre Conviviality-Inequality in Latin America, December 2020. http://dx.doi.org/10.46877/klengel.2020.30.

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The radical aesthetic of the historical avant-garde movements has often been explained as a reaction to the catastrophic experience of the First World War and a denouncement of the bourgeoisie’s responsibility for its horrors. This article explores a blind spot in these familiar interpretations of the international avant-garde. Not only the violence of the World War but also the experience of a worldwide deadly pandemic, the Spanish flu, have moulded the literary and artistic production of the 1920s. In this paper, I explore this hypothesis through the example of Mário de Andrade’s famous book of poetry Pauliceia desvairada (1922), which I reinterpret in the light of historical studies on the Spanish flu in São Paulo. An in-depth examination of all parts of this important early opus of the Brazilian Modernism shows that Mário de Andrade’s poetic images of urban coexistence simultaneously aim at a radical renewal of language and at a melancholic coming to terms with a traumatic pandemic past.
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Gomez del Campo, J., D. Shapira, E. Chavez, M. E. Ortiz, A. Dacal, A. D`Onofrio, and F. Terrasi. Coincidences between light particles, evaporation residues, and complex fragments emitted in the reaction {sup 58}Ni + {sup 58}Ni at 500 MeV bombarding energy. Office of Scientific and Technical Information (OSTI), March 1996. http://dx.doi.org/10.2172/206569.

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Mahadevan, Sankaran, Sarah Miele, Kyle Neal, Yanqing Bao, Vivek Agarwal, Binh T. Pham, and Douglas Adams. Light Water Reactor Sustainability Program Interrogation of Alkali-Silica Reaction Degraded Concrete Samples using Acoustic and Thermal Techniques to Support Development of a Structural Health Monitoring Framework. Office of Scientific and Technical Information (OSTI), April 2017. http://dx.doi.org/10.2172/1408495.

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