Literatura académica sobre el tema "Free radical"
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Artículos de revistas sobre el tema "Free radical"
Yañez Jaramillo, Lina M., Joy H. Tannous y Arno de Klerk. "Persistent Free Radicals in Petroleum". Processes 11, n.º 7 (11 de julio de 2023): 2067. http://dx.doi.org/10.3390/pr11072067.
Texto completoSilaev, Michael M. "Free-Radical Nonbranched-Chain Oxidation of Hydrogen". International Journal of Innovative Research in Computer Science & Technology 6, n.º 5 (septiembre de 2018): 91–98. http://dx.doi.org/10.21276/ijircst.2018.6.5.1.
Texto completoStevanovic, Jelka, Suncica Borozan, Slavoljub Jovic y Igor Ignjatovic. "Physiology of free radicals". Veterinarski glasnik 65, n.º 1-2 (2011): 95–107. http://dx.doi.org/10.2298/vetgl1102095s.
Texto completoKim, Eun-Kyung y Mi Ryeong Song. "Factors Influencing the Level of Oxygen Free Radicals in Female Nursing Students". Global Journal of Health Science 11, n.º 7 (15 de mayo de 2019): 1. http://dx.doi.org/10.5539/gjhs.v11n7p1.
Texto completoHorgan, John. "Free Radical". Scientific American 262, n.º 5 (mayo de 1990): 40–44. http://dx.doi.org/10.1038/scientificamerican0590-40.
Texto completoSilaev, Michael M. "KINETIC EQUATIONS FOR RADICAL-CHAIN OXIDATION INVOLVING PROCESS-INHIBITING ALKYL (OR HYDRO)TETRAOXYL FREE RADICAL". American Journal of Applied Sciences 05, n.º 06 (30 de junio de 2023): 29–48. http://dx.doi.org/10.37547/tajas/volume05issue06-07.
Texto completoAdrian, Gerild, Edi Suryanto y Defny S. Wewengkang. "AKTIVITAS PENANGKAL RADIKAL BEBAS DARI FRAKSI KULIT KAYU SAGU BARUK (Arenga microcarpha Beccari)". PHARMACON 10, n.º 1 (24 de febrero de 2021): 762. http://dx.doi.org/10.35799/pha.10.2021.32777.
Texto completoMikayil Aliyev, Mirza, Ulduz Yunis Safarova y Shafiqa Jahangir Jafarova. "CHARACTERISTICS AND THERAPEUTIC EFFECTS OF THE NOVEL FREE RADICAL SCAVENGER – EDARAVONE". NATURE AND SCIENCE 04, n.º 05 (28 de diciembre de 2020): 17–20. http://dx.doi.org/10.36719/2707-1146/05/17-20.
Texto completoJonsson, M., J. Lind, T. Reitberger, T. E. Eriksen y G. Merenyi. "Free radical combination reactions involving phenoxyl radicals". Journal of Physical Chemistry 97, n.º 31 (agosto de 1993): 8229–33. http://dx.doi.org/10.1021/j100133a018.
Texto completoReimer, Keith A., Masaru Tanaka, Charles E. Murry, Vincent J. Richard y Robert B. Jennings. "Evaluation of Free Radical Injury in Myocardium". Toxicologic Pathology 18, n.º 4a (enero de 1990): 470–80. http://dx.doi.org/10.1177/0192623390004part_105.
Texto completoTesis sobre el tema "Free radical"
Barreto, Joao Pedro Cabaco Moniz. "Dioxygen free radical reactions". Thesis, Oxford Brookes University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389105.
Texto completoEuapermkiati, Anucha. "Free radical telomerisation reactions". Thesis, University of Bradford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278895.
Texto completoShooter, Andrew James. "Living free radical polymerisation". Thesis, University of Warwick, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263817.
Texto completoWood, Geoffrey Paul Farra. "Theoretical Investigations of Radical-Mediated Protein Oxidation". Thesis, The University of Sydney, 2006. http://hdl.handle.net/2123/1413.
Texto completoWood, Geoffrey Paul Farra. "Theoretical Investigations of Radical-Mediated Protein Oxidation". University of Sydney, 2006. http://hdl.handle.net/2123/1413.
Texto completoThis thesis primarily details the application of high-level ab initio quantum chemistry techniques in order to understand aspects of free-radical mediated protein oxidation. Traditionally, product analysis and electron paramagnetic resonance (EPR) spectroscopy are the primary means for elucidating the chemistry of protein oxidation. However, in experiments involving relatively small proteins reacting with a controlled radical-flux, a vast array of compounds can be produced, which are often difficult to analyse. Quantum chemical techniques on the other hand, can calculate the properties of any particular species directly, without suffering from the problems associated with experiment, such as side-reactions and chain processes. The results presented in this thesis are aimed at elucidating mechanistic details of protein oxidation, which might otherwise be difficult to probe experimentally. Chapter 1 gives an overview of the free-radical hypothesis of disease and ageing. Protein-derived radicals can undergo a variety of reactions, with the particular reaction that occurs depending on numerous aspects. Many types of reactions have been identified through radiolysis experiments of amino acids, and these are detailed in this chapter. In addition, the key reactive species are characterized and their different chemistries explained. Chapter 2 details the theoretical tools used throughout this thesis. Species with unpaired electrons (radicals) present unique problems for quantum chemistry to handle, thus an appropriate choice of theoretical technique is needed. The approach taken in this thesis is to use high-level compound methods, many of which have been directly formulated to give improved results for radical species, to provide benchmark quality results by which other less demanding techniques can be assessed. During the course of this study, it became apparent there was a void in the armoury of tools that could be used for the theoretical chemistry calculations. Chapter 3 details the formulation of a new tool in an attempt to fill this gap. Historically, the formulation of this new procedure came after much of the work in this thesis had been carried out. Thus, for the study of many of the reactions of this thesis the new method has not been used. However, it is most appropriate to place its formulation after summarizing the current status of techniques in common use today. Chapters 4 and 5 detail computations carried out on models of peptides containing backbone carbon- and nitrogen-centered radicals. A number of different theoretical techniques are used in these chapters, ranging from the highly accurate and computationally intensive to the less reliable and less demanding. The highly accurate techniques are used to gauge the accuracy of the other less demanding theoretical techniques so that the latter can be used with confidence in larger systems. Not only is the choice of theoretical technique important but also the judicious choice of model is essential. With this in mind, models are incrementally built until convergence of the particular property of interest is reached. Chapters 6 and 7 detail the calculations of β-scission reactions of alkoxyl radicals, which are a particular class of reaction known to occur on peptide backbones. Alkoxyl radicals are particularly difficult for theory to describe correctly. Therefore, Chapter 6 extensively assesses and then identifies the theoretical methods needed to portray them. Chapter 7 uses the techniques identified in the previous chapter in order to predict how the preference for a particular type of β-scission reaction changes.
Grice, I. Darren y n/a. "Some New Aspects of Radical Trapping Using an Aminoxyl Radical Trap". Griffith University. School of Science, 1993. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050915.150556.
Texto completoGrice, I. Darren. "Some New Aspects of Radical Trapping Using an Aminoxyl Radical Trap". Thesis, Griffith University, 1993. http://hdl.handle.net/10072/365216.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Science
Science, Environment, Engineering and Technology
Full Text
Johansson, Erik. "Free radical mediated cellulose degradation". Doctoral thesis, KTH, Chemistry, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3477.
Texto completoThis thesis addresses the mechanisms involved in cellulosedegradation in general and Totally Chlorine Free (TCF) bleachingof pulp in particular. The thesis shows that the cellulosedegradation during high consistency ozone bleaching is explainedby free radical chain reactions.
By simulation, it has been shown that the number, weight andviscosity average of liner polymer chain length can be used tocalculate the number of random scissions in a linear polymer ofany molecular weight distribution, provided that there is acalibrated Mark-Houwink equation. A model describing partialdegradation of molecular weight distributions of linear polymersmeasured with viscometry was developed and verifiedexperimentally. The model predicts viscometric measurement ofchemical cellulose degradation by a rapidly reacting reagent tobe strongly dependent on cellulose accessibility.
The role of free radical reactions in cellulose degradationwas studied by varying the amount of ferrous ions and ozone addedto the cotton linters. The result was compared to the resultsobtained from cellulose of lower crystallinity (cellulose beads)by measuring average chain length. When a ferryl ion reacted withcotton linters in the presence of ozone, the very formation ofone glycosidic radical was more significant to degradation thanthe final step of forming one oxidised glycoside. The inefficientdegradation observed of the oxidation step is explainable by theamount of accessible glycosides being too small to influenceviscometry. The efficient degradation observed in associationwith the glycosidic radical formation is explained by initiationof free radical chain reactions that are propagated as long asthere is ozone in the system. As none of these phenomena werefound in the less crystalline cellulose, cellulose structureappears to be important for how free radical mediated cellulosedegradation develops.
The theory of free radical chain reactions coupled withdiffusion suggests a concentric expansion of the chain reactionsoutwards from the initial site of radical formation duringozonation of carbohydrates. This was confirmed by demonstratingfree radical chain reactions spreading from a spot of initiationoutwards during ozonation of a filter paper, using a pH-indicatorto monitor acid formation. Furthermore, the interior and exteriorof cellulose fibres doped with initiator were shown to bepermeated by small holes after ozonation.
Ethylene glycol was shown to improve the selectivity duringozone bleaching of oxygen bleached kraft pulp at pH 3. Optimalconditions were obtained at pH 3 for 25 wt% ethylene glycol. Theinfluence of ethylene glycol on selectivity is explained by aproportion of the free radical chain reactions being carried bythe ethylene glycol instead of the cellulose during ozonebleaching. The observations were summarised in the form of amodel where the observed degradations for pulp, bleached pulp andcotton fibres during both ozone bleaching and ethylene glycolassisted ozone bleaching were shown to agree with each other.
From g-irradiation of ozonised aqueous solutions of alcohol,the rate constant of superoxide formation from the peroxylradical of methanol was estimated to be 10 s-1. Rate constants of the reactions between ozone andalkylperoxyl radicals were determined to be around 104M-1s-1. The possibility of the reaction betweenalkylperoxyl radicals and ozone contributing significantly tofree radical chain reactions during ozonation of carbohydratesand alcohols could therefore be ruled out.
Cellulose, degradation, free radical, ozone, selectivity,ethylene glycol, alcohol, bleaching, kraft pulp, cotton linters,delignification, fibre, fibril, crystallinity, ferryl ion, freeradical chain reactions, TCF, viscometry, molecular weightdistributions, random scissions.
Hancock-Chen, Tanya. "Biologically relevant free radical reactions". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0019/NQ58282.pdf.
Texto completoJohansson, Erik E. "Free radical mediated cellulose degradation /". Stockholm : Department of Chemistry, Nuclear Chemistry, Royal Institute of Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3477.
Texto completoLibros sobre el tema "Free radical"
Coupé, Nez. Free radical. Fayetteville, NC: Croomia Books, 1992.
Buscar texto completoMurphy, Claire Rudolf. Free radical. New York: Clarion Books, 2002.
Buscar texto completoMyette, Michael. Free radical. Pittsburgh, PA: Pemberton Mysteries, 2008.
Buscar texto completoPaulauskas, Irena O. Radical polymerization: New developments. Hauppauge, N.Y: Nova Science Publishers, 2011.
Buscar texto completoG, Csomós y Vereckei A, eds. Free radical reactions in medicine. Berlin: Springer-Verlag, 1987.
Buscar texto completoFehér, J. Free radical reactions in medicine. Berlin: Springer-Verlag, 1987.
Buscar texto completoBruce, Wallace Kendall, ed. Free radical toxicology. Washington, DC: Taylor & Francis, 1997.
Buscar texto completoForbes, Malcolm D. E., ed. Carbon-Centered Free Radicals and Radical Cations. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2009. http://dx.doi.org/10.1002/9780470584118.
Texto completoForbes, Malcolm D. E., 1960-, ed. Carbon-centered free radicals and radical cations. Hoboken, N.J: Wiely, 2010.
Buscar texto completoRadical chemistry. New York: Ellis Horwood, 1994.
Buscar texto completoCapítulos de libros sobre el tema "Free radical"
Gooch, Jan W. "Free Radical". En Encyclopedic Dictionary of Polymers, 325–26. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_5286.
Texto completoDrăguţan, I., A. Caragheorgheopol, H. Căldăraru y R. J. Mehlhorn. "Hydrophobic Radical-Ions". En Organic Free Radicals, 47–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73963-7_24.
Texto completoHayashi, Nariyuki y Dalton W. Dietrich. "Free Radical Production". En Brain Hypothermia Treatment, 24. Tokyo: Springer Japan, 2004. http://dx.doi.org/10.1007/978-4-431-53953-7_14.
Texto completoNorman, Richard y James M. Coxon. "Free-radical reactions". En Principles of Organic Synthesis, 523–60. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2166-8_17.
Texto completoSerra, Christophe. "Free Radical Polymerization". En Micro Process Engineering, 197–212. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527631445.ch29.
Texto completoGrossman, Robert B. "Free-Radical Reactions". En The Art of Writing Reasonable Organic Reaction Mechanisms, 212–55. New York, NY: Springer New York, 1999. http://dx.doi.org/10.1007/978-1-4757-3030-2_5.
Texto completoGrossman, Robert B. "Free-Radical Reactions". En The Art of Writing Reasonable Organic Reaction Mechanisms, 283–339. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-28733-7_5.
Texto completoCarey, Francis A. y Richard J. Sundberg. "Free-Radical Reactions". En Advanced Organic Chemistry, 651–727. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4613-9795-3_12.
Texto completoHess, John L. "Free radical scavenging". En Plant Responses to the Gaseous Environment, 99–120. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1294-9_6.
Texto completoGuerrero-Santos, Ramiro, Enrique Saldívar-Guerra y José Bonilla-Cruz. "Free Radical Polymerization". En Handbook of Polymer Synthesis, Characterization, and Processing, 65–83. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118480793.ch4.
Texto completoActas de conferencias sobre el tema "Free radical"
Lewandowski, Heather J., L. Paul Parazzoli y Daniel Lobser. "Cold Free-Radical NH Molecules". En Laser Science. Washington, D.C.: OSA, 2006. http://dx.doi.org/10.1364/ls.2006.ltuh1.
Texto completoLeahy, David J., Douglas R. Cyr, David L. Osborn y Daniel M. Neumark. "Fast-beam studies of free-radical photodissociation: the CH2NO2 radical". En OE/LASE'93: Optics, Electro-Optics, & Laser Applications in Science& Engineering, editado por Cheuk Yiu Ng. SPIE, 1993. http://dx.doi.org/10.1117/12.143115.
Texto completoScott, T. W. y S. N. Liu. "Picosecond cage recombination measurements of polyatomic free radical pairs". En International Laser Science Conference. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/ils.1986.thl51.
Texto completoPfaendtner, Jim, Linda J. Broadbelt y Q. Jane Wang. "Quantum Chemical Studies of Free-Radical, Hindered Phenol Stabilizers". En World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64007.
Texto completoBochinski, J. R., E. R. Hudson y J. Ye. "Stark manipulation of the free radical OH". En Quantum Electronics and Laser Science (QELS). Postconference Digest. IEEE, 2003. http://dx.doi.org/10.1109/qels.2003.238172.
Texto completoChen, H., Y. T. Chan, H. V. Poor y K. Sezaki. "Range-Free Localization with the Radical Line". En ICC 2010 - 2010 IEEE International Conference on Communications. IEEE, 2010. http://dx.doi.org/10.1109/icc.2010.5502304.
Texto completoLulan, Theodore Y. K., Sri Fatmawati, Mardi Santoso y Taslim Ersam. "Free radical scavenging activity of Artocarpus champeden extracts". En THE 3RD INTERNATIONAL SEMINAR ON CHEMISTRY: Green Chemistry and its Role for Sustainability. Author(s), 2018. http://dx.doi.org/10.1063/1.5082460.
Texto completoGirbu, Vladilena, Nicon Ungur, Philippe Renaud y Veaceslav Kulcitki. "Free radical functionalizations of labdanes and related diterpenoids". En New frontiers in natural product chemistry, scientific seminar with international participation. Institute of Chemistry, 2021. http://dx.doi.org/10.19261/nfnpc.2021.ab20.
Texto completoHudson, Eric, J. R. Bochinski, H. J. Lewandowski y Jun Ye. "Cold free radical molecules in the laboratory frame". En International Quantum Electronics Conference. Washington, D.C.: OSA, 2004. http://dx.doi.org/10.1364/iqec.2004.imi5.
Texto completoJeremić, Svetlana R., Jelena R. Đorović Jovanović, Marijana S. Stanojević Pirković y Zoran S. Marković. "THERMODYNAMICALLY INVESTIGATIONS OF FREE RADICAL SCAVENGER POTENCY OF 1,2,4-TRIHYDROXYTHIOXANTHONE". En 1st INTERNATIONAL Conference on Chemo and BioInformatics. Institute for Information Technologies, University of Kragujevac, 2021. http://dx.doi.org/10.46793/iccbi21.414j.
Texto completoInformes sobre el tema "Free radical"
Dagdigian, Paul J. Spectroscopic Characterization of Free Radical Intermediates. Fort Belvoir, VA: Defense Technical Information Center, mayo de 2001. http://dx.doi.org/10.21236/ada394529.
Texto completoWang, M., J. M. Smith y B. J. McCoy. Free-radical kinetics of coal liquefaction. Office of Scientific and Technical Information (OSTI), julio de 1994. http://dx.doi.org/10.2172/26601.
Texto completoCyr, Douglas Robert. Fast beam studies of free radical photodissociation. Office of Scientific and Technical Information (OSTI), noviembre de 1993. http://dx.doi.org/10.2172/10148491.
Texto completoOsborn, David Lewis. Photodissociation dynamics and spectroscopy of free radical combustion intermediates. Office of Scientific and Technical Information (OSTI), diciembre de 1996. http://dx.doi.org/10.2172/503521.
Texto completoMiller, Roger E. The Growth and Characterization of Metastable Free Radical Nanoclusters. Fort Belvoir, VA: Defense Technical Information Center, junio de 2004. http://dx.doi.org/10.21236/ada424162.
Texto completoBaer, Tomas y Roger E. Miller. The Growth and Characterization of Metastable Free Radical Nanoclusters. Fort Belvoir, VA: Defense Technical Information Center, enero de 2007. http://dx.doi.org/10.21236/ada469731.
Texto completoBrennecke, Joan F. Studies of Ionic and Free Radical Reactions in Supercritical Water. Fort Belvoir, VA: Defense Technical Information Center, septiembre de 2001. http://dx.doi.org/10.21236/ada396304.
Texto completoJacox, Marilyn E. Free Radical Detection and Reactions in the Decomposition of Energetic Materials. Fort Belvoir, VA: Defense Technical Information Center, julio de 1987. http://dx.doi.org/10.21236/ada184677.
Texto completoCurl, R. F. y G. P. Glass. Infrared absorption spectroscopy and chemical kinetics of free radicals. [HCCN; CCH-H[sub 2] reaction; propargyl radical recombination]. Office of Scientific and Technical Information (OSTI), abril de 1993. http://dx.doi.org/10.2172/6566601.
Texto completoLampe, F. W. The free-radical and ion chemistry of volatile silanes, germanes and phosphines. Office of Scientific and Technical Information (OSTI), enero de 1990. http://dx.doi.org/10.2172/6290400.
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