Bibliografias temáticas / Homolyse

Literatura científica selecionada sobre o tema "Homolyse"

Autor: Grafiati

Publicado: 25 de maio de 2024

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Artigos de revistas sobre o assunto "Homolyse"

Wismach, Cathleen, Wolf-Walther du Mont, Peter G. Jones, Ludger Ernst, Ulrich Papke, Govindasamy Mugesh, Wolfgang Kaim, Matthias Wanner e Klaus D. Becker. "Selenol-Nitrosierung undSe-Nitrososelenol-Homolyse: ein Reaktionspfad mit möglichen biochemischen Implikationen". Angewandte Chemie 116, n.º 30 (26 de julho de 2004): 4061–64. http://dx.doi.org/10.1002/ange.200453872.

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Abderrazak, Youssef, Aditya Bhattacharyya e Oliver Reiser. "Durch sichtbares Licht induzierte Homolyse unedler, gut verfügbarer Metallsubstratkomplexe: Eine komplementäre Aktivierungsstrategie in der Photoredoxkatalyse". Angewandte Chemie 133, n.º 39 (18 de junho de 2021): 21268–84. http://dx.doi.org/10.1002/ange.202100270.

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Herberg, Clemens, Hans-;Dieter Beckhaus, Tamas Kürtvelyesi e Christoph Rüchardt. "Thermolabile Kohlenwasserstoffe, 32. Konkurrierende Cope-;Umlagerung und Homolyse vonmeso- undDL-3,4-Di(1-cyclohexen-1-yl)-2,2,5,5-tetramethylhexan". Chemische Berichte 126, n.º 1 (janeiro de 1993): 117–27. http://dx.doi.org/10.1002/cber.19931260119.

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Embo-Ibouanga, Ange W., Michel Nguyen, Lucie Paloque, Mathilde Coustets, Jean-Patrick Joly, Jean-Michel Augereau, Nicolas Vanthuyne et al. "Hybrid Peptide-Alkoxyamine Drugs: A Strategy for the Development of a New Family of Antiplasmodial Drugs". Molecules 29, n.º 6 (21 de março de 2024): 1397. http://dx.doi.org/10.3390/molecules29061397.

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The emergence and spread of drug-resistant Plasmodium falciparum parasites shed a serious concern on the worldwide control of malaria, the most important tropical disease in terms of mortality and morbidity. This situation has led us to consider the use of peptide-alkoxyamine derivatives as new antiplasmodial prodrugs that could potentially be efficient in the fight against resistant malaria parasites. Indeed, the peptide tag of the prodrug has been designed to be hydrolysed by parasite digestive proteases to afford highly labile alkoxyamines drugs, which spontaneously and instantaneously homolyse into two free radicals, one of which is expected to be active against P. falciparum. Since the parasite enzymes should trigger the production of the active drug in the parasite’s food vacuoles, our approach is summarized as “to dig its grave with its fork”. However, despite promising sub-micromolar IC50 values in the classical chemosensitivity assay, more in-depth tests evidenced that the anti-parasite activity of these compounds could be due to their cytostatic activity rather than a truly anti-parasitic profile, demonstrating that the antiplasmodial activity cannot be based only on measuring antiproliferative activity. It is therefore imperative to distinguish, with appropriate tests, a genuinely parasiticidal activity from a cytostatic activity.

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Andrianasolo, Eric H., Douglas Goeger e William H. Gerwick. "Mitsoamide: A cytotoxic linear lipopeptide from the Madagascar marine cyanobacterium Geitlerinema sp." Pure and Applied Chemistry 79, n.º 4 (1 de janeiro de 2007): 593–602. http://dx.doi.org/10.1351/pac200779040593.

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A new cytotoxic and linear peptide (IC50 460 nM to NCI-H460 human lung tumor cells) was isolated from the marine cyanobacterium Geitlerinema sp. The planar structure of mitsoamide was deduced by 1D and 2D NMR experiments in combination with MS analyses. The structure of mitsoamide contains an unusual polyketide unit (3,7-dimethoxy-5-methyl-nonanedioic acid, DMNA), incorporates a homolysine (HomoLys) residue and possesses a highly unusual piperidine aminal moiety. The configurations of the relatively common amino acids present in mitsoamide (Ala, Ile, N-Me-Ile, Phe, Val) were determined by chiral HPLC analysis of the acid hydrolysate.

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Nguyen, Thu Anh, Hui Ming Lim, Kenji Kinashi, Wataru Sakai, Naoto Tsutsumi, Satoko Okubayashi, Satoru Hosoda e Tetsu Sato. "Spin Trapping Analysis of Radical Intermediates on the Thermo-Oxidative Degradation of Polypropylene". Polymers 15, n.º 1 (30 de dezembro de 2022): 200. http://dx.doi.org/10.3390/polym15010200.

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The purpose of this study is to investigate the thermo-oxidative degradation behavior of polypropylene (PP) by comparing three types of pristine PP granules (consisting of homopolymer, random copolymer, and block copolymer) with their corresponding oxidized analogues. These analogues were intensely oxidized under oxygen at 90 °C for 1000 h by using the electron spin resonance (ESR) spin trapping method that can detect short-lived radical intermediates during the degradation. The degrees of oxidation could be evaluated by chemiluminescence (CL) intensity, which was related to the concentration of hydroperoxide groups generated in the PP chain. In the pristine PP samples, a small amount of hydroperoxides were found to be formed unintentionally, and their homolysis produces alkoxy radicals, RO•, which then undergo β-scission to yield chain-end aldehydes or chain-end ketones. These oxidation products continue to take part in homolysis to produce their respective carbonyl and carbon radicals. On the other hand, in the oxidized PP granules, because of their much higher hydroperoxide concentration, the two-stage cage reaction and the bimolecular decomposition of hydroperoxides are energetically favorable. Carbonyl compounds are formed in both reactions, which are then homolyzed to form the carbonyl radical species, •C(O)–. PP homopolymer produced the largest amount of carbonyl radical spin adduct; thus, it was found that the homopolymer is most sensitive to oxygen attack, and the presence of ethylene units in copolymers enhances the oxidation resistance of PP copolymers.

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Albalat, Muriel, Gérard Audran, Maxence Holzritter, Sylvain R. A. Marque, Philippe Mellet, Nicolas Vanthuyne e Pierre Voisin. "An enzymatic acetal/hemiacetal conversion for the physiological temperature activation of the alkoxyamine C–ON bond homolysis". Organic Chemistry Frontiers 7, n.º 19 (2020): 2916–24. http://dx.doi.org/10.1039/d0qo00559b.

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Enzymatic trigger. Upon enzymatic hydrolysis by Subtilisin A, highly stable alkoxyamines are transformed into highly labile alkoxyamines able to homolyze spontaneously in less than 500 seconds, at 37 °C.

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Edeleva, Mariya, Gerard Audran, Sylvain Marque e Elena Bagryanskaya. "Smart Control of Nitroxide-Mediated Polymerization Initiators’ Reactivity by pH, Complexation with Metals, and Chemical Transformations". Materials 12, n.º 5 (26 de fevereiro de 2019): 688. http://dx.doi.org/10.3390/ma12050688.

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Because alkoxyamines are employed in a number of important applications, such as nitroxide-mediated polymerization, radical chemistry, redox chemistry, and catalysis, research into their reactivity is especially important. Typically, the rate of alkoxyamine homolysis is strongly dependent on temperature. Nonetheless, thermal regulation of such reactions is not always optimal. This review describes various ways to reversibly change the rate of C–ON bond homolysis of alkoxyamines at constant temperature. The major methods influencing C–ON bond homolysis without alteration of temperature are protonation of functional groups in an alkoxyamine, formation of metal–alkoxyamine complexes, and chemical transformation of alkoxyamines. Depending on the structure of an alkoxyamine, these approaches can have a significant effect on the homolysis rate constant, by a factor of up to 30, and can shorten the half-lifetime from days to seconds. These methods open new prospects for the application of alkoxyamines in biology and increase the safety of (and control over) the nitroxide-mediated polymerization method.

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Peuker, A., W. Hitzl, T. Jäger, B. Maier e A. Staudach. "Homologe intrauterine Insemination". Gynäkologische Endokrinologie 5, n.º 2 (maio de 2007): 97–101. http://dx.doi.org/10.1007/s10304-007-0184-y.

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Decher, H. "Radikalhöhlenverkleinerung durch homologe Knorpelchips*". Laryngo-Rhino-Otologie 64, n.º 08 (agosto de 1985): 423–26. http://dx.doi.org/10.1055/s-2007-1008172.

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Mais fontes

Teses / dissertações sobre o assunto "Homolyse"

Carré, Christiane. "Étude des réactions photoinduites de l'octahydro-1,2,3,4,6,7,8,9 phénazine en solution ou la voie des diazines vers la photo-homolyse de l'eau". Paris 11, 1985. http://www.theses.fr/1985PA112084.

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Certaines diazines-1,4 - en particulier la phénazine – sont susceptibles de provoquer la photo-homolyse de l’eau. Ce travail porte sur les réactions photoinduites de l’octahydro-1,2,3,4,6,7,8,9 phénazine. Après étude par R. P. E. Des diverses espèces radicalaires formées par transfert d’un électron sur cette molécule, nous avons pu montrer que par irradiation des solutions d’octahydrophénazine dans l’eau ou dans l’alcool, c’est le radical cation qui se forme très rapidement : il résulte de l’arrachement d’un atome d’hydrogène par la molécule monoprotonée excitée. C’est surtout l’octahydrophénazine qui fournir cet atome d’hydrogène en milieu aqueux, tandis qu’en milieu alcoolique, c’est le solvant qui est le principal donneur. Le radical résultant de la perte d’un atome d’hydrogène par la molécule de départ redonne principalement le produit initial en arrachant un atome d’hydrogène au solvant, ce qui conduit à la formation d’eau oxygénée ou d’une cétone. Il peut également donner des produits d’addition ou évoluer vers la tétrahydro-1,2,3,4 phénazine. Le mécanisme proposé met en évidence le rôle particulier joué par les hydrogènes cyclohexaniques en α du noyau pyrazinique de la molécule.

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Havot, Jeffrey. "Synthèse et étude d'alcoxyamines inédites : de la théranostique à l'activation par résonnance plasmonique". Electronic Thesis or Diss., Aix-Marseille, 2022. http://www.theses.fr/2022AIXM0080.

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Les alcoxyamines sont des molécules connues pour leur capacité à produire des radicaux via l’homolyse de leur liaison C-ON. Cette homolyse peut être produite par diverses méthodes d’activation, comme par voie thermique, photocatalysée ou encore enzymatique. De plus, il est possible de modifier leur structure de manière exhaustive, afin d’en modifier les propriétés. Toutes ces possibilités permettent d’envisager pour cette famille de composés de nombreuses applications dans des domaines extrêmement variés. Cette thèse présente la synthèse et l’étude physico-chimique d’un certain nombre d’alcoxyamines inédites. Ces dernières ont été développées dans l’objectif d’une meilleure compréhension de leurs modes d’action et d’une amélioration des propriétés recherchées vis-à-vis d’applications innovantes comme la théranostique ou encore des moyens d’activation plus exotiques comme la résonnance plasmonique
Alkoxyamines are molecules well-known for their abilities to generate radicals from C-ON bond homolysis. This homolysis can be induced by various methods like thermally, by photocatalysis or by enzymatic activation. In addition, it is easy to modulate their chemical properties by modifying their structure. Thus we can imagine many various applications for these compounds. Here we will describe the synthesis of new alkoxyamines and investigations about their properties. These alkoxyamines have ben developed in order to acquire new knowledge about their reactivity, but also to improve their structures with respect to innovative applications like theranostic, or some new homolysis pathways like localized plasmon resonance

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Neugebauer, Alexander. "Methoden- und Basissatzabhängigkeit von Dichtefunktional- und Post-Hartree-Fock-ab-initio-Methoden zur Berechnung und Vorhersage genauer Gleichgewichtsabstände in organischen Molekülen sowie die Einführung eines energetischen Klassifizierungsschemas für organische Verbindungsklassen homologer Funktionalitäten auf quantenchemischer Grundlage". [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965907597.

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Kenklies, Janet. "Walk-through-Rekombination: Entwicklung einer neuen Methode zur homologen In- vitro-Rekombination und Optimierung des diagnostischen Enzyms Creatinase". [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974145572.

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Leichter, Michael. "Analyse der CAP-Homologe in der Maus". [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965643891.

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Maier, Holger. "Der murine Chemokinrezeptor CCR2 : Herstellung von Null-Mutanten durch homologe Rekombination in embryonalen Stammzellen /". [S.l. : s.n.], 2001. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB9075760.

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Schmidt, Nike Coelestina. "Bestimmung der Kopienzahl der FoxN1,4-Homologe in Lampetra fluviatilis". [S.l. : s.n.], 2005.

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Mägdefrau, Marion. "Ortsgerichtete Rekombination in Chlamydomonas reinhardtii am Beispiel des Cre/lox-Systems". kostenfrei, 2007. http://www.opus-bayern.de/uni-regensburg/volltexte/2008/880/.

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Lee, Jeung-Eun. "Hefe-Erv1-Protein und das homologe Säugerprotein sind essentielle mitochondriale Sulfhydryloxidasen". [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=963938142.

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Neef, Klaus. "Homologe archaeale Holliday-Struktur-auflösende Endonukleasen und ihre spezifischen Reaktionen mit cruciformer DNA". [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=970672233.

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Mais fontes

Livros sobre o assunto "Homolyse"

Milojković, Ratko. Homolje se dati neće. Beograd: NNK Internacional, 2021.

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Turovsʹkyĭ, A. A. Non-valency interaction in organic peroxides homolysis reactions. Hauppauge, N.Y: Nova Science Publishers, 2011.

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Čeliković, Borisav. Mlava, Homolje, Zvižd: Naselja, poreklo stanovništva, običaji. Beograd: Službeni glasnik, 2012.

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Giede-Jeppe, Antje. Generierung und Charakterisierung rekombinanter Cytomegaloviren mit Mutation der UAP56-Bindungsstelle sowie RNA-Bindungsdomäne des viralen mRNA-Exportfaktors pUL69. 2011.

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Giede-Jeppe, Antje. Generierung und Charakterisierung rekombinanter Cytomegaloviren mit Mutation der UAP56-Bindungsstelle sowie RNA-Bindungsdomäne des viralen mRNA-Exportfaktors pUL69. 2011.

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Bledowski, Jerzy. Pieniny polskie i slowackie, mapa turystyczna 1:25 000: Przelom Dunajca, Wawoz Homole. Wydawn. Kartograficzne Eko-Graf, 2000.

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Rettig, H. Biomaterialien und Nahtmaterial : Kongreßthemen: Kerasmiche Implantate-Implantate Aus Kohlenstoff-Metallimplantate-Homologe und Heterologe Implantatmaterialien-Kunststoffmaterialien-Nathmaterialien-Freie Vorträge. Springer London, Limited, 2013.

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Capítulos de livros sobre o assunto "Homolyse"

Cleaves, Henderson James. "Homolysis". In Encyclopedia of Astrobiology, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_733-3.

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Cleaves, Henderson James. "Homolysis". In Encyclopedia of Astrobiology, 1117. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_733.

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Cleaves, Henderson James. "Homolysis". In Encyclopedia of Astrobiology, 761–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_733.

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Cleaves II, Henderson James. "Homolysis". In Encyclopedia of Astrobiology, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-642-27833-4_733-4.

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Cleaves II, Henderson James. "Homolysis". In Encyclopedia of Astrobiology, 1343–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-65093-6_733.

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Arnemann, J. "Homologe Rekombination". In Springer Reference Medizin, 1143. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-48986-4_3504.

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Arndt, T. "Substanzen, homologe". In Springer Reference Medizin, 2237. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-48986-4_3748.

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Arnemann, J. "Homologe Rekombination". In Lexikon der Medizinischen Laboratoriumsdiagnostik, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2018. http://dx.doi.org/10.1007/978-3-662-49054-9_3504-1.

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Arndt, T. "Substanzen, homologe". In Lexikon der Medizinischen Laboratoriumsdiagnostik, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49054-9_3748-1.

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König, Dietmar P. "Homologe Knochentransplantation struktureller Allografts". In Fortbildung Osteologie, 90–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-05385-6_21.

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Trabalhos de conferências sobre o assunto "Homolyse"

Miljković, Đurđa, e Dajana Bjelajac. "GEOHERITAGE PROMOTION TOWARDS SUSTAINABLE TOURISM: "KUČAJ-BELJANICA MOUNTAINS" NATIONAL PARK IN THE HOMOLJE AREA (EASTERN SERBIA)". In Tourism in Southern and Eastern Europe 2023: Engagement & Empowerment: A Path Toward Sustainable Tourism. University of Rijeka, Faculty of Tourism and Hospitality Management, 2023. http://dx.doi.org/10.20867/tosee.07.19.

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Purpose – One of the main aims of this research is to highlight those elements that favour certain geosites within the Kučaj-Beljanica Mountains National Park as particularly valuable and attractive phenomena of the overall geodiversity of this part of Eastern Serbia. Since geoheritage protects only authentic geosites, they must be adequately protected and rationally used. Such nature values should be appropriately promoted towards sustainable tourism and geotourism, which is one of the reasons for this research. Methodology – This paper presents a review of representative geosites within the Kučaj-Beljanica National Park in the Homolje area. Interpretation of geosites is based on scientific, aesthetic, touristic and other values that make them authentic and specific concerning others. These criteria of values are based on Vujičić et. al (2011) geosite assessment model (GAM). ArcGIS software was used as a basic method tool to present the research area. Findings – Geotourism aims to develop and spread public awareness of geosites that has scientific and cultural values and will be discussed possible solutions for developing this part of tourism. It will be analyzed what are the main issues of not recognizing the natural worth and how should they be better preserved and adequately used in the future. Contribution – The main task and contribution of this study are to indicate what can be done to adequately develop sustainable tourism on the natural phenomenon. In that way, this study will have an impact on public education and consciousness about the vulnerability and multiple significance of geoheritage as an essential component of the environment.

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Relatórios de organizações sobre o assunto "Homolyse"

Lee, Shaoyung. Kinetic study of the reaction of ferrocenes and ferrocenium ions with ground and excited states of tris(2,2-bipyridine)chromium ions and the preparation and homolysis of organocobalt complexes. Office of Scientific and Technical Information (OSTI), janeiro de 1990. http://dx.doi.org/10.2172/6835414.

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