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Статті в журналах з теми "Free radical"
Yañez Jaramillo, Lina M., Joy H. Tannous, and Arno de Klerk. "Persistent Free Radicals in Petroleum." Processes 11, no. 7 (July 11, 2023): 2067. http://dx.doi.org/10.3390/pr11072067.
Повний текст джерелаSilaev, Michael M. "Free-Radical Nonbranched-Chain Oxidation of Hydrogen." International Journal of Innovative Research in Computer Science & Technology 6, no. 5 (September 2018): 91–98. http://dx.doi.org/10.21276/ijircst.2018.6.5.1.
Повний текст джерелаStevanovic, Jelka, Suncica Borozan, Slavoljub Jovic, and Igor Ignjatovic. "Physiology of free radicals." Veterinarski glasnik 65, no. 1-2 (2011): 95–107. http://dx.doi.org/10.2298/vetgl1102095s.
Повний текст джерелаKim, Eun-Kyung, and Mi Ryeong Song. "Factors Influencing the Level of Oxygen Free Radicals in Female Nursing Students." Global Journal of Health Science 11, no. 7 (May 15, 2019): 1. http://dx.doi.org/10.5539/gjhs.v11n7p1.
Повний текст джерелаHorgan, John. "Free Radical." Scientific American 262, no. 5 (May 1990): 40–44. http://dx.doi.org/10.1038/scientificamerican0590-40.
Повний текст джерелаSilaev, Michael M. "KINETIC EQUATIONS FOR RADICAL-CHAIN OXIDATION INVOLVING PROCESS-INHIBITING ALKYL (OR HYDRO)TETRAOXYL FREE RADICAL." American Journal of Applied Sciences 05, no. 06 (June 30, 2023): 29–48. http://dx.doi.org/10.37547/tajas/volume05issue06-07.
Повний текст джерелаAdrian, Gerild, Edi Suryanto, and Defny S. Wewengkang. "AKTIVITAS PENANGKAL RADIKAL BEBAS DARI FRAKSI KULIT KAYU SAGU BARUK (Arenga microcarpha Beccari)." PHARMACON 10, no. 1 (February 24, 2021): 762. http://dx.doi.org/10.35799/pha.10.2021.32777.
Повний текст джерелаMikayil Aliyev, Mirza, Ulduz Yunis Safarova, and Shafiqa Jahangir Jafarova. "CHARACTERISTICS AND THERAPEUTIC EFFECTS OF THE NOVEL FREE RADICAL SCAVENGER – EDARAVONE." NATURE AND SCIENCE 04, no. 05 (December 28, 2020): 17–20. http://dx.doi.org/10.36719/2707-1146/05/17-20.
Повний текст джерелаJonsson, M., J. Lind, T. Reitberger, T. E. Eriksen, and G. Merenyi. "Free radical combination reactions involving phenoxyl radicals." Journal of Physical Chemistry 97, no. 31 (August 1993): 8229–33. http://dx.doi.org/10.1021/j100133a018.
Повний текст джерелаReimer, Keith A., Masaru Tanaka, Charles E. Murry, Vincent J. Richard, and Robert B. Jennings. "Evaluation of Free Radical Injury in Myocardium." Toxicologic Pathology 18, no. 4a (January 1990): 470–80. http://dx.doi.org/10.1177/0192623390004part_105.
Повний текст джерелаДисертації з теми "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.
Повний текст джерелаEuapermkiati, Anucha. "Free radical telomerisation reactions." Thesis, University of Bradford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278895.
Повний текст джерелаShooter, Andrew James. "Living free radical polymerisation." Thesis, University of Warwick, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263817.
Повний текст джерелаWood, Geoffrey Paul Farra. "Theoretical Investigations of Radical-Mediated Protein Oxidation." Thesis, The University of Sydney, 2006. http://hdl.handle.net/2123/1413.
Повний текст джерелаWood, Geoffrey Paul Farra. "Theoretical Investigations of Radical-Mediated Protein Oxidation." University of Sydney, 2006. http://hdl.handle.net/2123/1413.
Повний текст джерелаThis 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, and 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.
Повний текст джерелаGrice, I. Darren. "Some New Aspects of Radical Trapping Using an Aminoxyl Radical Trap." Thesis, Griffith University, 1993. http://hdl.handle.net/10072/365216.
Повний текст джерелаThesis (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.
Повний текст джерелаThis 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.
Повний текст джерелаJohansson, 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.
Повний текст джерелаКниги з теми "Free radical"
Coupé, Nez. Free radical. Fayetteville, NC: Croomia Books, 1992.
Знайти повний текст джерелаMurphy, Claire Rudolf. Free radical. New York: Clarion Books, 2002.
Знайти повний текст джерелаMyette, Michael. Free radical. Pittsburgh, PA: Pemberton Mysteries, 2008.
Знайти повний текст джерелаPaulauskas, Irena O. Radical polymerization: New developments. Hauppauge, N.Y: Nova Science Publishers, 2011.
Знайти повний текст джерелаG, Csomós, and Vereckei A, eds. Free radical reactions in medicine. Berlin: Springer-Verlag, 1987.
Знайти повний текст джерелаFehér, J. Free radical reactions in medicine. Berlin: Springer-Verlag, 1987.
Знайти повний текст джерелаBruce, Wallace Kendall, ed. Free radical toxicology. Washington, DC: Taylor & Francis, 1997.
Знайти повний текст джерелаForbes, 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.
Повний текст джерелаForbes, Malcolm D. E., 1960-, ed. Carbon-centered free radicals and radical cations. Hoboken, N.J: Wiely, 2010.
Знайти повний текст джерелаRadical chemistry. New York: Ellis Horwood, 1994.
Знайти повний текст джерелаЧастини книг з теми "Free radical"
Gooch, Jan W. "Free Radical." In 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.
Повний текст джерелаDrăguţan, I., A. Caragheorgheopol, H. Căldăraru, and R. J. Mehlhorn. "Hydrophobic Radical-Ions." In Organic Free Radicals, 47–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73963-7_24.
Повний текст джерелаHayashi, Nariyuki, and Dalton W. Dietrich. "Free Radical Production." In Brain Hypothermia Treatment, 24. Tokyo: Springer Japan, 2004. http://dx.doi.org/10.1007/978-4-431-53953-7_14.
Повний текст джерелаNorman, Richard, and James M. Coxon. "Free-radical reactions." In Principles of Organic Synthesis, 523–60. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2166-8_17.
Повний текст джерелаSerra, Christophe. "Free Radical Polymerization." In Micro Process Engineering, 197–212. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527631445.ch29.
Повний текст джерелаGrossman, Robert B. "Free-Radical Reactions." In 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.
Повний текст джерелаGrossman, Robert B. "Free-Radical Reactions." In 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.
Повний текст джерелаCarey, Francis A., and Richard J. Sundberg. "Free-Radical Reactions." In Advanced Organic Chemistry, 651–727. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4613-9795-3_12.
Повний текст джерелаHess, John L. "Free radical scavenging." In Plant Responses to the Gaseous Environment, 99–120. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1294-9_6.
Повний текст джерелаGuerrero-Santos, Ramiro, Enrique Saldívar-Guerra, and José Bonilla-Cruz. "Free Radical Polymerization." In 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.
Повний текст джерелаТези доповідей конференцій з теми "Free radical"
Lewandowski, Heather J., L. Paul Parazzoli, and Daniel Lobser. "Cold Free-Radical NH Molecules." In Laser Science. Washington, D.C.: OSA, 2006. http://dx.doi.org/10.1364/ls.2006.ltuh1.
Повний текст джерелаLeahy, David J., Douglas R. Cyr, David L. Osborn, and Daniel M. Neumark. "Fast-beam studies of free-radical photodissociation: the CH2NO2 radical." In OE/LASE'93: Optics, Electro-Optics, & Laser Applications in Science& Engineering, edited by Cheuk Yiu Ng. SPIE, 1993. http://dx.doi.org/10.1117/12.143115.
Повний текст джерелаScott, T. W., and S. N. Liu. "Picosecond cage recombination measurements of polyatomic free radical pairs." In International Laser Science Conference. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/ils.1986.thl51.
Повний текст джерелаPfaendtner, Jim, Linda J. Broadbelt, and Q. Jane Wang. "Quantum Chemical Studies of Free-Radical, Hindered Phenol Stabilizers." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64007.
Повний текст джерелаBochinski, J. R., E. R. Hudson, and J. Ye. "Stark manipulation of the free radical OH." In Quantum Electronics and Laser Science (QELS). Postconference Digest. IEEE, 2003. http://dx.doi.org/10.1109/qels.2003.238172.
Повний текст джерелаChen, H., Y. T. Chan, H. V. Poor, and K. Sezaki. "Range-Free Localization with the Radical Line." In ICC 2010 - 2010 IEEE International Conference on Communications. IEEE, 2010. http://dx.doi.org/10.1109/icc.2010.5502304.
Повний текст джерелаLulan, Theodore Y. K., Sri Fatmawati, Mardi Santoso, and Taslim Ersam. "Free radical scavenging activity of Artocarpus champeden extracts." In THE 3RD INTERNATIONAL SEMINAR ON CHEMISTRY: Green Chemistry and its Role for Sustainability. Author(s), 2018. http://dx.doi.org/10.1063/1.5082460.
Повний текст джерелаGirbu, Vladilena, Nicon Ungur, Philippe Renaud, and Veaceslav Kulcitki. "Free radical functionalizations of labdanes and related diterpenoids." In New frontiers in natural product chemistry, scientific seminar with international participation. Institute of Chemistry, 2021. http://dx.doi.org/10.19261/nfnpc.2021.ab20.
Повний текст джерелаHudson, Eric, J. R. Bochinski, H. J. Lewandowski, and Jun Ye. "Cold free radical molecules in the laboratory frame." In International Quantum Electronics Conference. Washington, D.C.: OSA, 2004. http://dx.doi.org/10.1364/iqec.2004.imi5.
Повний текст джерелаJeremić, Svetlana R., Jelena R. Đorović Jovanović, Marijana S. Stanojević Pirković, and Zoran S. Marković. "THERMODYNAMICALLY INVESTIGATIONS OF FREE RADICAL SCAVENGER POTENCY OF 1,2,4-TRIHYDROXYTHIOXANTHONE." In 1st INTERNATIONAL Conference on Chemo and BioInformatics. Institute for Information Technologies, University of Kragujevac, 2021. http://dx.doi.org/10.46793/iccbi21.414j.
Повний текст джерелаЗвіти організацій з теми "Free radical"
Dagdigian, Paul J. Spectroscopic Characterization of Free Radical Intermediates. Fort Belvoir, VA: Defense Technical Information Center, May 2001. http://dx.doi.org/10.21236/ada394529.
Повний текст джерелаWang, M., J. M. Smith, and B. J. McCoy. Free-radical kinetics of coal liquefaction. Office of Scientific and Technical Information (OSTI), July 1994. http://dx.doi.org/10.2172/26601.
Повний текст джерелаCyr, Douglas Robert. Fast beam studies of free radical photodissociation. Office of Scientific and Technical Information (OSTI), November 1993. http://dx.doi.org/10.2172/10148491.
Повний текст джерелаOsborn, David Lewis. Photodissociation dynamics and spectroscopy of free radical combustion intermediates. Office of Scientific and Technical Information (OSTI), December 1996. http://dx.doi.org/10.2172/503521.
Повний текст джерелаMiller, Roger E. The Growth and Characterization of Metastable Free Radical Nanoclusters. Fort Belvoir, VA: Defense Technical Information Center, June 2004. http://dx.doi.org/10.21236/ada424162.
Повний текст джерелаBaer, Tomas, and Roger E. Miller. The Growth and Characterization of Metastable Free Radical Nanoclusters. Fort Belvoir, VA: Defense Technical Information Center, January 2007. http://dx.doi.org/10.21236/ada469731.
Повний текст джерелаBrennecke, Joan F. Studies of Ionic and Free Radical Reactions in Supercritical Water. Fort Belvoir, VA: Defense Technical Information Center, September 2001. http://dx.doi.org/10.21236/ada396304.
Повний текст джерелаJacox, Marilyn E. Free Radical Detection and Reactions in the Decomposition of Energetic Materials. Fort Belvoir, VA: Defense Technical Information Center, July 1987. http://dx.doi.org/10.21236/ada184677.
Повний текст джерелаCurl, R. F., and 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), April 1993. http://dx.doi.org/10.2172/6566601.
Повний текст джерелаLampe, F. W. The free-radical and ion chemistry of volatile silanes, germanes and phosphines. Office of Scientific and Technical Information (OSTI), January 1990. http://dx.doi.org/10.2172/6290400.
Повний текст джерела