Academic literature on the topic 'Methylene oxidation'
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Journal articles on the topic "Methylene oxidation"
Urgoitia, Garazi, Raul SanMartin, María Herrero, and Esther Domínguez. "Recent Advances in Homogeneous Metal-Catalyzed Aerobic C–H Oxidation of Benzylic Compounds." Catalysts 8, no. 12 (December 8, 2018): 640. http://dx.doi.org/10.3390/catal8120640.
Full textLupaşcu, T., M. Ciobanu, V. Boţan, and A. Nistor. "Catalytic Oxidation of Methylene Blue." Chemistry Journal of Moldova 5, no. 2 (December 2010): 37–40. http://dx.doi.org/10.19261/cjm.2010.05(2).04.
Full textZhao, Jinpeng, Takeshi Nanjo, Emilio C. de Lucca, and M. Christina White. "Chemoselective methylene oxidation in aromatic molecules." Nature Chemistry 11, no. 3 (December 17, 2018): 213–21. http://dx.doi.org/10.1038/s41557-018-0175-8.
Full textLupaşcu, T., M. Ciobanu, O. Bogdevici, and V. Boţan. "Products Derived from Catalytic Oxidation of Methylene Blue." Chemistry Journal of Moldova 6, no. 1 (June 2011): 77–80. http://dx.doi.org/10.19261/cjm.2011.06(1).07.
Full textKANG, M. "Methylene chloride oxidation on oxidative carbon-supported chromium oxide catalyst." Applied Catalysis A: General 266, no. 2 (July 2004): 163–72. http://dx.doi.org/10.1016/j.apcata.2004.02.041.
Full textStoyanova, Maria, and Stoyanka Christoskova. "Catalytic degradation of methylene blue in aqueous solutions over Ni- and Co- oxide systems." Open Chemistry 9, no. 6 (December 1, 2011): 1000–1007. http://dx.doi.org/10.2478/s11532-011-0086-7.
Full textPerez-Benito, Joaquin F., and Donald G. Lee. "Oxidation of hydrocarbons. 15. A study of the oxidation of alkenes by methyltributylammonium permanganate." Canadian Journal of Chemistry 63, no. 12 (December 1, 1985): 3545–50. http://dx.doi.org/10.1139/v85-582.
Full textSodeau, John R., and Lynden J. Whyte. "Oxidation of methylene in low-temperature matrices." Journal of the Chemical Society, Faraday Transactions 87, no. 23 (1991): 3725. http://dx.doi.org/10.1039/ft9918703725.
Full textCasarotto, Marco G., and Gerald J. Smith. "Methylene-blue-sensitized photo-oxidation of terpenes." Journal of Photochemistry 40, no. 1 (September 1987): 87–91. http://dx.doi.org/10.1016/0047-2670(87)87047-8.
Full textShafikova, Elza U., Elena M. Tsyrlina, Leonid V. Spirikhin, Alsu A. Balandina, Shamil K. Latypov, Marat S. Yunusov, and Oleg G. Sinyashin. "Oxidative Transformations of Lappaconitine and 19-Oxolappaconine, Structural Revision of an obtained 8,9-Seco Product." Natural Product Communications 3, no. 10 (October 2008): 1934578X0800301. http://dx.doi.org/10.1177/1934578x0800301001.
Full textDissertations / Theses on the topic "Methylene oxidation"
Smith, Kristen Colleen. "Surface processes ruthenium film growth, silicon nanocrystal synthesis, and methylene partial oxidation /." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3035980.
Full textMeyer, Jerry Christopher. "Oxidation chemistry and kinetics of model compounds in supercritical water : glucose, acetic acid, and methylene chloride." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/12396.
Full textAcerson, Mark Jeffrey. "Synthesis of 4'-Ester Resveratrol Analogues, Chromium Trioxide Oxidation of Terpenes, and Synthesis of Mimics of (-)-Englerin A." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/5458.
Full textPolshakov, Dmitrii Arkadyevich. "Ultrafast spectroscopy and dynamics of nitrenes and carbenes." Columbus, Ohio : Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1130968887.
Full textMuritu, John Waititu. "Oxidative addition reactions and methylene-bridged diiridium complexes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0013/MQ59855.pdf.
Full textDias, Gustavo Carvalho. "Geração de linhagens celulares HEK293 knockdown para as proteínas p53, ATM, mTOR e PGC1α e estudo do papel de p53 na resposta ao estresse oxidativo provocado por azul de metileno." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/46/46131/tde-29042014-143702/.
Full textDNA is constantly being chemically modified, which results in activation of the DNA damage response program. The mitochondrial DNA (mtDNA), a circular molecule of 16.6 kb in length, is primary target of reactive oxygen species (ROS) due its proximity to the electron transport chain, in the mitochondrial inner membrane. Almost all known DNA damage repair pathways operating in the nucleus were also found in the mitochondrion; however, their regulation remains not well understood. The proteins p53, ATM, mTOR e PGC1α have many cellular functions, including control of energy metabolism and cell fate after stress. Thus, we hypothesized that those proteins could participate in maintaining of mtDNA, through direct or indirect roles. To test this hypothesis, we generated isogenic knockdown cell lines to further use them to study their role in the mtDNA damage response. For that, were generated HEK293 knockdown cell lines that stably express target-specific shRNAs. Efficient knockdown was checked using western blotting. Here, we also studied the role of p53 in the cellular response to mitochondrial oxidative stress induced by methylene blue (MB). MB is a photoactive dye that crosses biological membranes due to its lypophylic character and, in mammalian cells, accumulates in organelles such as mitochondria; however, its cytotoxic mechanism is not well understood. As the p53 protein participates in several cellular functions and translocates to mitochondria under stress conditions, where it can induce apoptosis or modulate mtDNA repair, we investigated whether p53 was involved in MB + light-induced cell death using p53 knockdown clones selected from the cell lines generated in the first phase of this work. Under normal conditions, p53 knockdown caused a decrease in mtDNA copy number and stimulated cellular growth supported by either glucose or galactose. After MB treatment, p53-kd cells showed a slight decrease in cell death compared to scrambled shRNA controls. Evaluation of cell death after MB treatment, using flow cytometry analysis, indicated that MB was able to induce significant levels of apoptotic cell death, which was dependent on p53 levels. Taken together, our results suggest that MB induces cell death, probably via apoptosis, in a p53 dependent manner. This effect may be mediated by p53 directly or by its role in mtDNA copy number maintenance.
Okolongo, Gauthier Nganda. "Advanced oxidative water treatment process using an electrohydraulic discharge reactor and TiO2 immobilised on nanofibres." Thesis, University of Western Cape, 2013. http://hdl.handle.net/11394/3329.
Full textThe aim of this study was to design and build an electrohydraulic discharge reactor in such a way that the synthetic immobilized TiO2 nanophotocatalytic components could be integrated, for the production of active species such as OH radicals, ozone and hydrogen peroxide, as a cocktail to clean drinking water without the addition of chemicals. The research objectives include: • To design and construct the different AOP prototypes based on various electrode configurations and compare their operation. • To optimize the discharge parameters and conditions of the best AOP system. • To determine the effectiveness of the best prototype for the degradation of methylene blue as model pollutant. • To compare the designed AOP system with the Sodis method for the disinfection of contaminated river water. • To prepare supported TiO2 nanoparticles via electro spinning, followed by combustion and study the effect on the morphology of TiO2 nanoparticles. • To determine the stability and robustness of composite nano-crystalline TiO2 photocatalysts by sonication • To determine the enhanced effect of combining the composite TiO2 in the AOP system on degradation of methylene blue under the same conditions. • To detect the active species promoting disinfection.
Barin, Luisa Machado. "PAPEL DA TERAPIA FOTODINÂMICA ANTIMICROBIANA ADJUVANTE AO TRATAMENTO PERIODONTAL SOB PARÂMETROS DE ESTRESSE OXIDATIVO PLASMÁTICO E COMPORTAMENTO VASCULAR." Universidade Federal de Santa Maria, 2015. http://repositorio.ufsm.br/handle/1/6159.
Full textThe aim of this study was to evaluate the effects of methylene blue (MB) photosensitizer (PS) solubilized in ethanol in antimicrobial photodynamic therapy (aPDT) as an adjuvant periodontal treatment, at oxidative stress (OS) parameters and vascular behavior in rat model. Besides, investigate greater involvement of angiogenesis at the destruction or healing stages of periodontal disease (PD). One hundred and twenty male adult Wistar rats were divided randomly into five groups. The control groups were negative control (NC) (no PD, n=15) and positive control (PC) (with PD, without any treatment, n=15). The other groups had PD and underwent different types of treatment, such as scaling and root planing (SRP) and irrigation with 1mL of saline solution (SRP, n=30); SRP and aPDT with MB solubilized in water (aPDT I, n=30); SRP and aPDT with MB containing ethanol (aPDT II, n=30). The PD was induced via the installation of a ligature around the mandibular right first molar. After 7 days, the ligature was removed and animals received treatment. At 7, 15 and 30 days, rats were euthanized and the gingival tissue surrounding the induction area was removed for histomorphometric analysis of the number and diameter of blood vessels by staining with hematoxylin and eosin (H&E). The collected blood was centrifuged and the plasma was used to determine lipid peroxidation by quantifying thiobarbituric acid reactive substances (TBARS), vitamin C (VIT C) and glutathione reduced (GSH) levels. The oxidative status showed higher TBARS levels in PC group in 7, 15 and 30 days, and indicated a protective influence of aPDT II on plasma observed from lower lipid peroxidation. GSH levels were consumed in PC, aPDT I and aPDT II groups throughout the experiment. Furthermore, aPDT II also increased antioxidant defenses in plasma: i) higher levels of GSH, and ii) increased levels of VIT C. Interestingly, the VIT C plasmatic levels were restored in the aPDT II group in the 30th experimental day. Histomorphometric findings in 7 days showed that treated groups (SRP, aPDT I and aPDT II) showed higher number of blood vessels, and the aPDT II group showed the highest values among them. From these results, aPDT modifies PD course, reducing oxidative systemic damage and stimulating the antioxidant defense system, thus protecting the areas closely affected by PD in rats. Moreover, was observed a relationship between increased expression of angiogenesis and repair stage of the PD. In summary, we suggest that the aPDT with MB solubilized in ethanol provides better therapeutic responses in periodontal treatment.
O objetivo deste estudo foi avaliar os efeitos do fotossensibilizador (Fs) azul de metileno (AM) solubilizado em etanol na terapia fotodinâmica antimicrobiana (TFDa) como um tratamento periodontal adjuvante, sob parâmetros de estresse oxidativo (EO) e de comportamento vascular em modelo de rato. Bem como, investigar o maior envolvimento da angiogênese no estágio de avanço ou reparo da doença periodontal (DP). Cento e vinte ratos Wistar adultos machos foram randomizados e divididos em cinco grupos. Os grupos controles eram controle negativo (CN) (sem DP, n = 15) e controle positivo (CP) (com DP, sem qualquer tratamento, n = 15). Os demais grupos apresentavam DP e foram submetidos a diferentes tipos de tratamentos, como raspagem e alisamento radicular (RAR) e irrigação com 1 mL de solução salina (RAR, n = 30); RAR e TFDa com AM solubilizado em água (TFDa I, n = 30); RAR e TFDa com AM contendo etanol (TFDa II, n = 30). A DP foi induzida através da colocação de uma ligadura ao redor do primeiro molar inferior direito. Após 7 dias, a ligadura foi removida e os animais receberam tratamento. Aos 7, 15 e 30 dias, os ratos foram eutanasiados e o tecido gengival circundante à área de indução foi removido para análise histomorfométrica do número e diâmetro dos vasos sanguíneos através da coloração com Hematoxilina e Eosina (HE). O sangue recolhido foi centrifugado e o plasma foi utilizado para determinar os níveis de peroxidação lipídica mensurados pelas substâncias reativas ao ácido tiobarbitúrico (TBARS), vitamina C (VIT C) e glutationa reduzida (GSH). O status oxidativo demostrou maiores níveis de TBARS no grupo CP em 7, 15 e 30 dias, e indicou uma influência protetora da TFDa II no plasma observada a partir de menor peroxidação lipídica. Níveis de GSH foram consumidos nos grupos CP, TFDa I e TFDa II durante o experimento. Ainda, TFDa II também aumentou as defesas antioxidantes no plasma: a) níveis mais elevados de GSH, e b) aumento dos níveis de VIT C. Interessantemente, os níveis plasmáticos de VIT C foram restaurados no grupo TFDa II no trigésimo dia experimental. Os achados histomorfométricos mostraram em 7 dias que os grupos tratados (RAR, TFDa I e TFDa II) apresentaram elevado número de vasos sanguíneos, e o grupo TFDa II apresentou os maiores valores entre eles. A partir destes resultados, fica evidente que TFDa modifica a DP, reduzindo o dano oxidativo sistêmico, e estimula o sistema de defesa antioxidante, protegendo, assim, as zonas afetadas intimamente pela DP em ratos. Além disso, foi observado uma relação entre a maior expressão da angiogênese e o estágio de reparo da DP. Em síntese, sugerimos que a TFDa com AM solubilizado em etanol proporciona melhores respostas terapêuticas no tratamento periodontal.
Santos, Nayra Fernandes. "Relação entre estresse oxidativo fotoinduzido e morte celular autofágica." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/46/46131/tde-01102014-090745/.
Full textPhotodynamic Therapy (PDT) is a promising therapeutic modality that has shown effective clinical outcomes and benefits in terms of costs to the national health system. Although PDT is associated with induction of cell death by necrosis or apoptosis, recent data suggest the activation of autophagy. In order to understand the relationship between reactive oxygen species (ROS), generated after light activation of photosensitizers (PSs), and the autophagic cell death induction, we have used two phenothiazines with similar structure - methylene blue (MB) and 1,9-dimethyl methylene blue (DMMB); HaCaT and HeLa cells were used as biological models and LEDs emitting at 633 nm were used as light source. Cell viability assays as function of light dose and PS concentration showed that the increase in cell death was directly proportional to the PS concentration and light dose, to the both PSs. At IC50 was verified that DMMB concentration (10 nmol/L) is lower than MB concentration (2,0 µmol/L) in two order of magnitude, and this difference is reflected in degree of oxidative stress promoted by photosensitizers . Only for MB the amount of detected ROS is highly correlated with loss of cell viability, while for DMMB this correlation is weak, because there is loss of viability without large generation of ROS. Nevertheless, the viability decreased for DMMB is highly correlated with the increase of autophagy, indicating occurrence of autophagic cell death in both HaCaT cells and in HeLa cells. The analyses of damaged cell organelles indicated that both PSs, after be photoactivated, induce lysosomal and mithochondrial damage in HaCaT cells. And the subcellular localization assay confirmed that DMMB and MB are localized in these organelles. Because the subcellular localization of PSs influences cell death mechanisms, this research identified that MB, in the same nanomolar concentration of DMMB, does not induce autophagy, because it is photochemically inactive in mitochondria due the reducing coenzymes present in this organelle. DMMB has a lower reduction potential than MB, which hinders PS reduction in mitochondria, and possibly generate a mild oxidative stress that compromise the integrity of mitochondria and lysosomes, and justify autophagy induction as a cell death mechanism. The conditions that MB is not fully reduced in the cellular environment are at higher concentrations, in which was detected high level of oxidative stress and autophagic cell death was not observed after photosensitization. These results show that the efficiency of cell death induced by PDT is not necessarily related with oxidative stress level, since the oxidative stress induced by DMMB was lesser than by MB, however, the cell death was greater. This research confirms the concept that more effective photosensitizers for PDT means greater specificity of photosensitization reactions, and not only improvement of the efficiency of ROS generation.
Checchia, Robert Garcia. "Estudo de propriedades biofísicas de membrana sob estresse oxidativo e a interação com proteínas formadoras de poros." Universidade de São Paulo, 2019. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-21032019-171115/.
Full textIn this work we investigate the effects of photoirradiation and toxins on mimetic cell membranes. As a model of lipid membranes, giant unilamellar vesicles (GUVs) composed of oxidized and oxidized pro-lipids were observed by optical phase contrast microscopy. Initially we studied the photo-response of membranes composed of POPC and POPG dispersed in solution containing methylene blue (MB). Following, we studied the effect of pore-forming toxins, Sticolysin I (ST I) and Sticolysin II (ST II), on membranes containing oxidized and non-oxidized lipids. The results of MB (10 M) dispersed in solution of membranes composed of POPC and the anionic lipid POPG indicated that the increase in the negative charge density in the membranes of GUVs, which favors the binding of positively charged molecules as MB in the membranes, consequently increases membrane permeability in regard to membranes composed only of POPC. This is due to the fact that the preferred location of the MB in the POPC: POPG membrane favors the formation of singlet oxygen near the double bond of the alkyl chain, initiating the lipid peroxidation reaction more effectively than in the POPC membrane. The results of the action of the STI and STII toxins (21 nM) on GUVs containing non oxidised lipids PC and sphingomyelin show that only STII is able to permeate these membranes at this concentration. Moreover, our results suggest that the existence of fluid-gel phase separation in the lipid bilayer composed of PC:SM (molar ratio 1:1) favors the action of the StII toxin. When analyzing membranes containing hydroperoxidized lipids (POPC-OOH) dispersed in solution containing STII (21 nM) we observed an increase in membrane permeability in a set of GUVs, associated with pore formation, only in lipid bilayers formed by mixtures of oxidized lipids (POPC-OOH) and non-oxidized ones. The higher the concentration of oxidized lipids in the membrane, the faster the permeability increases.
Book chapters on the topic "Methylene oxidation"
Shaw, Henry, Yi Wang, Tia-Chiang Yu, and Anthony E. Cerkanowicz. "Catalytic Oxidation of Trichloroethylene and Methylene Chloride." In ACS Symposium Series, 358–79. Washington, DC: American Chemical Society, 1993. http://dx.doi.org/10.1021/bk-1993-0518.ch017.
Full textMarrone, Philip A., Russell P. Lachance, Joanna L. DiNaro, Brian D. Phenix, Jerry C. Meyer, Jefferson W. Tester, William A. Peters, and K. C. Swallow. "Methylene Chloride Oxidation and Hydrolysis in Supercritical Water." In Innovations in Supercritical Fluids, 197–216. Washington, DC: American Chemical Society, 1995. http://dx.doi.org/10.1021/bk-1995-0608.ch013.
Full textHamidani, Meriem, Souad Djerad, and Lakhdar Tifouti. "Oxidation of Methylene Blue by Copper via a Heterogeneous Fenton-Like Process." In Recent Advances in Environmental Science from the Euro-Mediterranean and Surrounding Regions (2nd Edition), 219–23. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-51210-1_37.
Full textTallapaka, Ajit Kumar, Jyothi Thati, and Sailu Chintha. "Oxidative Photocatalytic Degradation of Methylene Blue in Wastewater." In Recent Trends in Waste Water Treatment and Water Resource Management, 119–27. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-0706-9_12.
Full textSobkowiak, Andrzej, Aimin Qiu, Xiu Liu, Antoni Llobet, and Donald T. Sawyer. "Copper(I)/(t-BuOOH)-Induced Activation of Dioxygen for the Ketonization of Methylenic Carbons." In The Activation of Dioxygen and Homogeneous Catalytic Oxidation, 481. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-3000-8_72.
Full textLandais, Y., and J. M. Vincent. "Oxidation of Active Methylene Compounds." In Ketones, 1. Georg Thieme Verlag KG, 2005. http://dx.doi.org/10.1055/sos-sd-026-00591.
Full textBlack, D. StC. "Oxidation of α-Methylene Substituents." In Fully Unsaturated Small-Ring Heterocycles and Monocyclic Five-Membered Hetarenes with One Heteroatom, 1. Georg Thieme Verlag KG, 2001. http://dx.doi.org/10.1055/sos-sd-009-00660.
Full textMurphy, P. J. "Oxidation of 4-Methylene-4-telluropyrans." In Six-Membered Hetarenes with One Chalcogen, 1. Georg Thieme Verlag KG, 2003. http://dx.doi.org/10.1055/sos-sd-014-01179.
Full textTaber, Douglass F. "Oxidation and Reduction." In Organic Synthesis. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199965724.003.0011.
Full textTaber, Douglass F. "Best Synthetic Methods: Oxidation." In Organic Synthesis. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199965724.003.0009.
Full textConference papers on the topic "Methylene oxidation"
Zhang, Yi, Yan Luo, Jian-Qiang Hu, Tao Zhang, and Yun-Yun Xu. "Study on Antioxidation Properties of the Complex of Dithiocarbamate With Tolutriazole Antioxidant." In ASME/STLE 2007 International Joint Tribology Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ijtc2007-44020.
Full textQing, Li. "Kinetic Mechanism of Photo-catalytic Oxidation for Soluble Methylene Blue by Iron-doped TiO2." In 2012 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring (CDCIEM). IEEE, 2012. http://dx.doi.org/10.1109/cdciem.2012.99.
Full textRokhima, Ummu, Henry Setiyanto, Muhammad Zulfikar, Vienna Saraswaty, and Nandang Mufti. "Study of Methylene Blue Degradation Using Mediated Electrochemical Oxidation With Ce (IV) Ions: Effect of Supporting Electrolyte, Ce (III) Concentration, and Oxidation Potential." In Proceedings of the 7th Mathematics, Science, and Computer Science Education International Seminar, MSCEIS 2019, 12 October 2019, Bandung, West Java, Indonesia. EAI, 2020. http://dx.doi.org/10.4108/eai.12-10-2019.2296387.
Full textChou, P., K. Lee, and IM Adcock. "Oxidative Stress Induces Nuclear Export of the Histone Methylase Suv39H1 a Glucocorticoid Receptor Co-Repressor Protein." In American Thoracic Society 2009 International Conference, May 15-20, 2009 • San Diego, California. American Thoracic Society, 2009. http://dx.doi.org/10.1164/ajrccm-conference.2009.179.1_meetingabstracts.a1957.
Full textLei, Wen, Chao Ren, Tao Huang, and Lei Lei. "Enhancement of thermo-oxidative aging resistance of ramie fiber/HDPE composites using tetrakis[methylene(3,5-di-tert-butyl-4-hydroxyhydrocinnamate)]methane as antioxidant." In 2011 International Conference on Consumer Electronics, Communications and Networks (CECNet). IEEE, 2011. http://dx.doi.org/10.1109/cecnet.2011.5769261.
Full textZheng, Mary Minyi, Britney Harris, James Woods, David Colby, and Julia Kirshner. "Abstract B30: 15-Methylene-Eburnamonine: A preventative agent against breast to brain metastases by targeting circulating tumor cells and cancer stem cells through induction of oxidative stress." In Abstracts: Twelfth Annual AACR International Conference on Frontiers in Cancer Prevention Research; Oct 27-30, 2013; National Harbor, MD. American Association for Cancer Research, 2013. http://dx.doi.org/10.1158/1940-6215.prev-13-b30.
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