Relevant bibliographies by topics / Chlora nitrone

Academic literature on the topic 'Chlora nitrone'

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Published: 18 May 2024

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Journal articles on the topic "Chlora nitrone"

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Humbert, Guillaume, Mathieu Sebilo, Marion Chorin, Véronique Vaury, and Anniet M. Laverman. "Analytical pitfalls when using inhibitors in specific nitrification assays." Environmental Chemistry 18, no. 7 (2021): 295. http://dx.doi.org/10.1071/en21118.

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Environmental contextSpecific inhibitors of biological reactions in the nitrogen cycle can be used to determine the origin of reactive nitrogen species; these nitrogen species potentially degrade water quality or influence climate. However, inhibitors can potentially interfere with methods for the analysis of stable isotope ratios and concentrations of ammonium, nitrite and nitrate. The effect of this interference on several commonly used methods was investigated. These findings should help avoid the use of inappropriate analytical methods and improve data quality in studies of the nitrogen cycle.AbstractCharacterisation of the reaction steps involved in nitrification can help determine the processes that produce potentially harmful environmental pollutants such as nitrite, nitrate and nitrous oxide (N2O). The use of nitrification inhibitors can uncouple the reactions and therefore assist in their mechanistic and isotopic characterisation. However, nitrification inhibitors can interfere with the methods for determining the concentrations and stable isotope ratios of ammonium, nitrite and nitrate. The interference of allylthiourea, hydrazine or sodium chlorate in colorimetric methods and stable isotope measurements were assessed. Ammonium concentrations were measured with the salicylate method. Nitrite and nitrate were measured with the Griess reaction, with nitrate first being reduced to nitrite with vanadium (III) chloride. For the stable isotope analysis, nitrite was reduced to N2O in a 1 : 1 sodium azide and acetic acid buffer solution; preceded, when necessary, by ammonium oxidation to nitrite by hypobromite or nitrate reduction to nitrite on an activated cadmium column. Sodium chlorate did not interfere with any of the analyses and none of the inhibitors interfered with the stable isotope ratios determination of nitrate. Allylthiourea interfered with ammonium and nitrate quantification. Both allylthiourea and hydrazine also clearly interfered in the determination of the nitrogen stable isotope ratio of ammonium, while only allylthiourea interfered in the determination of nitrogen and oxygen stable isotope ratios of nitrite. Although we suggest methods to overcome some of these interferences, our study demonstrated that the analytical methods used in combination with allylthiourea or hydrazine as nitrification inhibitors should be considered with caution when designing experiments.
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Klittich, C., and J. F. Leslie. "Nitrate reduction mutants of fusarium moniliforme (gibberella fujikuroi)." Genetics 118, no. 3 (March 1, 1988): 417–23. http://dx.doi.org/10.1093/genetics/118.3.417.

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Abstract Twelve strains of Fusarium moniliforme were examined for their ability to sector spontaneously on toxic chlorate medium. All strains sectored frequently; 91% of over 1200 colonies examined formed chlorate-resistant, mutant sectors. Most of these mutants had lesions in the nitrate reduction pathway and were unable to utilize nitrate (nit mutants). nit mutations occurred in seven loci: a structural gene for nitrate reductase (nit1), a regulatory gene specific for the nitrate reduction pathway (nit3), and five genes controlling the production of a molybdenum-containing cofactor that is necessary for nitrate reductase activity (nit2, nit4, nit5, nit6, nit7). No mutations affecting nitrite reductase or a major nitrogen regulatory locus were found among over 1000 nit mutants. Mutations of nit1 were recovered most frequently (39-66%, depending on the strain) followed by nit3 mutations (23-42%). The frequency of isolation of each mutant type could be altered, however, by changing the source of nitrogen in the chlorate medium. We concluded that genetic control of nitrate reduction in F. moniliforme is similar to that in Aspergillus and Neurospora, but that the overall regulation of nitrogen metabolism may be different.
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Fischer, Marco, Jesse Alderson, Geertje van Keulen, Janet White, and R. Gary Sawers. "The obligate aerobe Streptomyces coelicolor A3(2) synthesizes three active respiratory nitrate reductases." Microbiology 156, no. 10 (October 1, 2010): 3166–79. http://dx.doi.org/10.1099/mic.0.042572-0.

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Streptomyces coelicolor A3(2) synthesizes three membrane-associated respiratory nitrate reductases (Nars). During aerobic growth in liquid medium the bacterium was able to reduce 50 mM nitrate stoichiometrically to nitrite. Construction and analysis of a mutant in which all three narGHJI operons were deleted showed that it failed to reduce nitrate. Deletion of the gene encoding MoaA, which catalyses the first step in molybdenum cofactor biosynthesis, also prevented nitrate reduction, consistent with the Nars being molybdoenzymes. In contrast to the triple narGHJI mutant, the moaA mutant was also unable to use nitrate as sole nitrogen source, which indicates that the assimilatory nitrate reductases in S. coelicolor are also molybdenum-dependent. Analysis of S. coelicolor growth on solid medium demonstrated that Nar activity is present in both spores and mycelium (hypha). Development of a survival assay with the nitrate analogue chlorate revealed that wild-type S. coelicolor spores and mycelium were sensitive to chlorate after anaerobic incubation, independent of the presence of nitrate, while both the moaA and triple nar mutants were chlorate-resistant. Complementation of the triple nar mutant with the individual narGHJI operons delivered on cosmids revealed that each operon encoded an enzyme that was synthesized and active in nitrate or chlorate reduction. The data obtained from these studies allow a tentative assignment of Nar1 activity to spores, Nar2 to spores and mycelium, and Nar3 exclusively to mycelium.
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Chapyshev, Sergei V., Denis V. Korchagin, Patrik Neuhaus, and Wolfram Sander. "High-spin intermediates of the photolysis of 2,4,6-triazido-3-chloro-5-fluoropyridine." Beilstein Journal of Organic Chemistry 9 (April 16, 2013): 733–42. http://dx.doi.org/10.3762/bjoc.9.83.

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In contrast to theoretical expectations, the photolysis of 2,4,6-triazido-3-chloro-5-fluoropyridine in argon at 5 K gives rise to EPR peaks of just two triplet mononitrenes, two quintet dinitrenes, and a septet trinitrene. EPR spectral simulations in combination with DFT calculations show that observable nitrenes can be assigned to triplet 2,4-diazido-3-chloro-5-fluoropyridyl-6-nitrene (D T = 1.026 cm−1, E T = 0), triplet 2,6-diazido-3-chloro-5-fluoropyridyl-4-nitrene (D T = 1.122 cm−1, E T = 0.0018 cm−1), quintet 4-azido-3-chloro-5-fluoropyridyl-2,6-dinitrene (D Q = 0.215 cm−1, E Q = 0.0545 cm−1), quintet 2-azido-3-chloro-5-fluoropyridyl-4,6-dinitrene (D Q = 0.209 cm−1, E Q = 0.039 cm−1) and septet 3-chloro-5-fluoropyridyl-2,4,6-trinitrene (D S = −0.1021 cm−1, E S = −0.0034 cm−1). Preferential photodissociation of the azido groups located in ortho-positions to the fluorine atom of pyridines is associated with strong π-conjugation of these groups with the pyridine ring. On photoexcitation, such azido groups are more efficiently involved in reorganization of the molecular electronic system and more easily adopt geometries of the locally excited predissociation states.
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Oosterkamp, Margreet J., Farrakh Mehboob, Gosse Schraa, Caroline M. Plugge, and Alfons J. M. Stams. "Nitrate and (per)chlorate reduction pathways in (per)chlorate-reducing bacteria." Biochemical Society Transactions 39, no. 1 (January 19, 2011): 230–35. http://dx.doi.org/10.1042/bst0390230.

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The reduction of (per)chlorate and nitrate in (per)chlorate-reducing bacteria shows similarities and differences. (Per)chlorate reductase and nitrate reductase both belong to the type II DMSO family of enzymes and have a common bis(molybdopterin guanine dinucleotide)molybdenum cofactor. There are two types of dissimilatory nitrate reductases. With respect to their localization, (per)chlorate reductase is more similar to the dissimilatory periplasmic nitrate reductase. However, the periplasmic, unlike the membrane-bound, respiratory nitrate reductase, is not able to use chlorate. Structurally, (per)chlorate reductase is more similar to respiratory nitrate reductase, since these reductases have analogous subunits encoded by analogous genes. Both periplasmic (per)chlorate reductase and membrane-bound nitrate reductase activities are induced under anoxic conditions in the presence of (per)chlorate and nitrate respectively. During microbial (per)chlorate reduction, molecular oxygen is generated. This is not the case for nitrate reduction, although an atypical reaction in nitrite reduction linked to oxygen formation has been described recently. Microbial oxygen production during reduction of oxyanions may enhance biodegradation of pollutants under anoxic conditions.
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Nelson, J. A., and P. A. Lefebvre. "Targeted disruption of the NIT8 gene in Chlamydomonas reinhardtii." Molecular and Cellular Biology 15, no. 10 (October 1995): 5762–69. http://dx.doi.org/10.1128/mcb.15.10.5762.

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We have used homologous recombination to disrupt the nuclear gene NIT8 in Chlamydomonas reinhardtii. This is the first report of targeted gene disruption of an endogenous locus in C. reinhardtii and only the second for a photosynthetic eukaryote. NIT8 encodes a protein necessary for nitrate and nitrite assimilation by C. reinhardtii. A disruption vector was constructed by placing the CRY1-1 selectable marker gene, which confers emetine resistance, within the NIT8 coding region. nit8 mutants are unable to grow on nitrate as their sole nitrogen source (Nit-) and are resistant to killing by chlorate. One of 2,000 transformants obtained after selection on emetine-chlorate medium contained a homologous insertion of five copies of the disruption plasmid into the NIT8 gene, producing an emetine-resistant, chlorate-resistant Nit- phenotype. The mutant phenotype was rescued by the wild-type NIT8 gene upon transformation. Seven other mutations at the nit8 locus, presumably resulting from homologous recombination with the disruption plasmid, were identified but were shown to be accompanied by deletions of the surrounding genomic region.
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Ye, Miaomiao, Tuqiao Zhang, Zhiwei Zhu, Yan Zhang, and Yiping Zhang. "Photodegradation of 4-chloronitrobenzene in the presence of aqueous titania suspensions in different gas atmospheres." Water Science and Technology 64, no. 7 (October 1, 2011): 1466–72. http://dx.doi.org/10.2166/wst.2011.531.

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The photocatalytic degradation of 4-chloronitrobenzene (4-CNB) was carried out using Degussa P25 TiO2 as photocatalyst in three different gas atmospheres: nitrogen, oxygen, and ozone. The total organic carbon (TOC) and inorganic anions including chloride, nitrite, and nitrate anions were measured to monitor the mineralization processes, while the degradation of 4-CNB and the formation of intermediates were followed by liquid chromatography–mass spectrometry (LC/MS). Results showed that the photocatalytic efficiency followed the order of TiO2/UV/N2 < TiO2/UV/O2 < TiO2/UV/O3, which was further proved by evaluating the reaction activities using electron paramagnetic resonance (EPR) spin trapping technique. Chlorine atom, nitro group and hydrogen atom of the benzene ring could be displaced by hydroxyl radical (•OH) leading to the formation of chloride, nitrite (III) anions and a variety of phenols, then the nitrite (III) anions were further oxidized to nitrate (V) anions. 4-Nitrophenol and 5-chloro-2-nitrophenol were identified and quantified in both of the TiO2/UV/N2 and TiO2/UV/O2 processes while no aromatic intermediates were monitored in the process of TiO2/UV/O3.
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Ren, Tie, R�al Roy, and Roger Knowles. "Production and Consumption of Nitric Oxide by Three Methanotrophic Bacteria." Applied and Environmental Microbiology 66, no. 9 (September 1, 2000): 3891–97. http://dx.doi.org/10.1128/aem.66.9.3891-3897.2000.

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ABSTRACT We studied nitrogen oxide production and consumption by methanotrophs Methylobacter luteus (group I),Methylosinus trichosporium OB3b (group II), and an isolate from a hardwood swamp soil, here identified by 16S ribosomal DNA sequencing as Methylobacter sp. strain T20 (group I). All could consume nitric oxide (nitrogen monoxide, NO), and produce small amounts of nitrous oxide (N2O). OnlyMethylobacter strain T20 produced large amounts of NO (>250 parts per million by volume [ppmv] in the headspace) at specific activities of up to 2.0 � 10−17 mol of NO cell−1 day−1, mostly after a culture became O2 limited. Production of NO by strain T20 occurred mostly in nitrate-containing medium under anaerobic or nearly anaerobic conditions, was inhibited by chlorate, tungstate, and O2, and required CH4. Denitrification (methanol-supported N2O production from nitrate in the presence of acetylene) could not be detected and thus did not appear to be involved in the production of NO. Furthermore, cd1 and Cu nitrite reductases, NO reductase, and N2O reductase could not be detected by PCR amplification of the nirS,nirK, norB, and nosZ genes, respectively. M. luteus and M. trichosporiumproduced some NO in ammonium-containing medium under aerobic conditions, likely as a result of methanotrophic nitrification and chemical decomposition of nitrite. For Methylobacter strain T20, arginine did not stimulate NO production under aerobiosis, suggesting that NO synthase was not involved. We conclude that strain T20 causes assimilatory reduction of nitrate to nitrite, which then decomposes chemically to NO. The production of NO by methanotrophs such as Methylobacter strain T20 could be of ecological significance in habitats near aerobic-anaerobic interfaces where fluctuating O2 and nitrate availability occur.
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PÉREZ, M. Dolores, Celedonio GONZÁLEZ, Julio ÁVILA, Nélida BRITO, and José M. SIVERIO. "The YNT1 gene encoding the nitrate transporter in the yeast Hansenula polymorpha is clustered with genes YNI1 and YNR1 encoding nitrite reductase and nitrate reductase, and its disruption causes inability to grow in nitrate." Biochemical Journal 321, no. 2 (January 15, 1997): 397–403. http://dx.doi.org/10.1042/bj3210397.

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DNA sequencing in the phage λJA13isolated from a λEMBL3 Hansenula polymorphagenomic DNA library containing the nitrate reductase- (YNR1) and nitrite reductase- (YNI1) encoding genes revealed an open reading frame (YNT1) of 1524 nucleotides encoding a putative protein of 508 amino acids with great similarity to the nitrate transporters from Aspergillus nidulansand Chlamydomonas reinhardtii. Disruption of the chromosomal YNT1copy resulted in incapacity to grow in nitrate and a significant reduction in rate of nitrate uptake. The disrupted strain is still sensitive to chlorate, and, in the presence of 0.1 mM nitrate, the expression of YNR1 and YNI1 and the activity of nitrate reductase and nitrite reductase are significantly reduced compared with the wild-type. Northern-blot analysis showed that YNT1 is expressed when the yeast is grown in nitrate and nitrite but not in ammonium solution.
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Hemissi, Hanene, Sonia Abid, and Mohamed Rzaigui. "5-Chloro-2-methoxyanilinium nitrate." Acta Crystallographica Section E Structure Reports Online 64, no. 5 (April 4, 2008): o801. http://dx.doi.org/10.1107/s1600536808008805.

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Dissertations / Theses on the topic "Chlora nitrone"

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Kafley, Saurav. "Synthesis and 1, 3 -dipolar cycloaddition reaction of N-phenyl £ chlora nitrone." Thesis, University of North Bengal, 2010. http://hdl.handle.net/123456789/1419.

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Yu, Jiefei. "Coupled Nitrate Reduction and Ammonium Oxidation in Electrochemical Treatment for Nitrate Brine Wastes." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1289943689.

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Sharma, Prawin Kumar. "Greener approach to the synthesis of some novel class of isoxazolidine and isoxazoline derivatives using N-methyl and N-phenyl-a-chloro nitrones." Thesis, University of North Bengal, 2016. http://ir.nbu.ac.in/handle/123456789/1884.

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Feldman, Kenneth A. "Isolation and characterization of chlorate-resistant mutants in Arabidopsis thaliana /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487260135358163.

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Dasgupta, Jhinuk. "Investigation on some 2-Alkylamido 6-chloro/Nitro-4H-1, 3, 2-Benjodi-oxaphosphorin-2 - Sulphides having pesticidal activities." Thesis, University of North Bengal, 1988. http://hdl.handle.net/123456789/1130.

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BENAHMED-ALI, NACERA. "Comportement du chrome, du titane et du titane nitrure vis-a-vis du chlore gazeux sec a haute temperature." Paris 6, 1988. http://www.theses.fr/1988PA066642.

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L'etude de la chloruration seche du titane et du chrome effectuee dans une atmosphere statique de chlore a permis d'etablir les diagrammes temperature-pression delimitant les differents domaines de cinetiques reactionnelles. La finalite de l'etude est d'acceder au comportement d'alliages resistants a la corrosion par le chlore a partir des connaissances acquises sur les metaux purs. Dans le cas du titane, l'etude a ete etendue au titane nitrure par plasma d'ammoniac expose a la corrosion par le chlore sec et a la corrosion humide par l'acide sulfurique
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Matta, Roger. "Oxydation chimique in situ de polluants organiques : application aux nitro-aromatiques et aux organochlorés." Aix-Marseille 1, 2009. http://www.theses.fr/2009AIX11010.

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Ce mémoire est consacré à l’étude de l’oxydation chimique des polluants organiques dans le cadre général de la dépollution des sols. L’oxydation chimique de trois polluants organiques appartenant à deux familles différentes (organochlorés et nitroaromatiques) par : le peroxyde d’hydrogène (réaction de Fenton et de Fenton modifiée), le persulfate (activé ou non activé) et le permanganate a été étudiée. L’oxydation du PCP, du TCE et du TNT par le peroxyde d’hydrogène et les phases minérales contenant le fer (Fenton hétérogène) s’est avérée applicable à pH 7. L’activité des oxydes de fer (notamment la magnétite) est préservée lorsque cet oxyde est contenu dans des structures à base de silicates ou d’argile, indiquant que la présence du fer endogène du sol pourrait être exploitée pour le traitement ISCO de ces polluants. Les rendements d’oxydation à un pH proche de la neutralité augmentent en présence des agents chélatants du fer comme l’EDTA et la CMCD. Le persulfate s’est montré capable d’oxyder le PCP et le TCE sans aucune activation chimique alors qu’il n’a montré aucun effet sur la transformation du TNT. Les espèces minérales du fer (goethite et magnétite) n’ont montré aucune réactivité vis-à-vis du persulfate. Toutefois, l’ajout de l’EDTA contribue à la mise en solution du fer et à une réaction d’oxydation du polluant en solution. Le permanganate s’est avéré capable d’oxyder le PCP avec une cinétique supérieure à celle du TCE. Cependant l’efficacité de l’oxydation du TNT est beaucoup plus faible. Une voie de dégradation du PCP a été proposée pour la première fois. Les résultats obtenus en colonne ont confirmé ceux obtenues en batch et ont montré la faisabilité de l’oxydation chimique dans des conditions proches à celles rencontrées sur le terrain. Pour des recherches ultérieures concernant l’application de l’ISCO, le permanganate s’impose comme oxydant pour les organochlorés alors que le Fenton hétérogène pour les nitroaromatiques
This memory deals with the chemical oxidation of organic pollutants within the general framework of soil remediation. The chemical oxidation of three organic pollutants belonging to two different families (organochlorines and nitroaromatics) by: hydrogen peroxide (Fenton’s reaction and modified Fenton), persulfate (activated or not) and permanganate were studied. The oxidation of PCP, TCE and TNT by hydrogen peroxide and iron containing minerals (heterogeneous Fenton) proved to be applicable tat pH 7 and the activity of iron oxides (in particular magnetite) is preserved when incorporated into mineral assemblages with silicates or clay. These results indicate that the presence of the soil endogenous iron could be exploited for ISCO treatment process. The yields of oxidation with a pH close to neutrality increase in the presence of iron chelating agents like EDTA and CMCD. Persulfate was able to oxidize the PCP and the TCE without any chemical activation whereas it did not show any effect on the transformation of TNT. The iron minerals (goethite and magnetite) did not show any reactivity with respect to persulfate. However, the effectiveness of oxidation was increased by the activation of persulfate with EDTA iron chelates. Permanganate was able to oxidize PCP with a higher rate than that of TCE. However the effectiveness of the oxidation of TNT is much lower. A degradation pathway of PCP was proposed for the first time. The results obtained in column confirmed those obtained in batch and showed the feasibility of chemical oxidation under conditions similar to those found at field. For further research concerning the application of ISCO, pemanganate is the oxidant of choice for the organochlorine compounds and heterogeneous Fenton for the nitroaromatics
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Stepien, Christelle. "Etude de réactions ion-molécule impliquées dans la détection stratosphérique du nitrate de chlore par spectrométrie de masse à ionisation chimique." Orléans, 2001. http://www.theses.fr/2001ORLE2059.

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Les espèces minoritaires stratosphériques peuvent être mesurées in-situ par spectrométrie de masse à ionisation chimique. Cette méthode employée par l'instrument MACSIMS (Measurement of atmospheric constituents by selective ion mass spectrometry) consiste à faire réagir des espèces minoritaires avec des ions générés dans la source de l'instrument. Les ions spécifiques produits sont détectés par spectrométrie de masse. Le projet MACSIMS avait pour objectif de développer une méthode de mesure simultanée de HNO3, CIONO2, HCI et N2O5. Les spectres de vol de MACSIMS ont révélé une chimie ionique plus complexe que prévu. Des études en laboratoire, dans deux réacteurs à écoulement couplés à des spectromètres de masse quadripolaires ont été effectuées pour obtenir des données cinétiques et mécanistiques sur les réactions ion-molécule impliquées dans les mesures de MACSIMS. Les expériences concernent principalement le nitrate de chlore, CIONO2, un des réservoirs du chlore stratosphérique. Quasiment toutes les réactions d'ions avec CIONO2 procèdent à une vitesse proche de la limite de collision.
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Claudel, Arnaud. "Elaboration et caractérisation de couches de nitrure d'aluminium AlN par CVD haute température en chimie chlorée." Grenoble INPG, 2009. http://www.theses.fr/2009INPG0122.

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En optoélectronique, l'avènement des technologies basées sur les nitrures du groupe III permettront une diminution de la consommation d'électricité dédiée à l'éclairage. Le nitrure d'aluminium, AlN, est particulièrement attractif pour la fabrication de diodes électroluminescentes UV. L’objectif de ce travail de thèse est d’étudier la faisabilité d'un procédé de croissance de monocristaux d'AlN à haute température à partir d'une phase gazeuse chlorée (HTCVD). Les dépôts d’AlN sont réalisés à partir de NH3 et AlCl3 synthétisé in-situ par chloruration de l’aluminium métallique par le chlore. Une étude thermodynamique préliminaire du système Al-N-Cl-H est réalisée afin de mettre en évidence les possibilités d'utilisation des matériaux, de montrer les mécanismes chimiques globaux et certains paramètres propices à l’élaboration d'AlN par CVD. Des conditions propices à l'élaboration de couches épitaxiées sont recherchées. Les dépôts polycristallins et épitaxiés réalisés sont étudiés structuralement et leurs propriétés sont caractérisées
In optoelectronics, group III nitride semiconductors technologies will allow to reduce the electrical energy required for lighting. Aluminium nitride, AlN, is a very attractive substrate for UV LEDs manufacturing. The goal of this PhD thesis is to study the development of a growth process toi produce AlN single crystals at high temperature from a chloride gas-phase (HTCVD). AlN layers are deposited using NH3 and AlCl3 which is synthetized by the in situ reaction between aluminium and chlorine. A preliminary thermodynamic study is carried out in order to investigate materials incompatibilities at high temperature, the global chemical mechanisms and the optimized parameters useful for the development of AlN growth by CVD. An experimental parametric study is performed in order to understand the influence of operating conditions on AlN growth rate, surface morphology and crystalline state. Optimized conditions to achieve epitaxial growth are also investigated. Both, polycrystalline and epitaxial layers are structurally studied and their properties are investigated
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El, Dib Gisèle. "Dégradation atmosphérique des composés organiques volatils carbonyles (amides, aldéhydes aromatiques) par le radical nitrate et l’atome de chlore et réactivité atmosphérique du radical benzylperoxyle." Reims, 2006. http://theses.univ-reims.fr/exl-doc/GED00000952.pdf.

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L’objectif de la thèse est de définir le devenir atmosphérique de quelques COV utilisés dans différents secteurs industriels ou produits directement dans la troposphère lors de l’oxydation d’autres COV. Nous avons étudié la dégradation du radical benzylperoxyle, d’une série d’amides (N-diméthyl formamide, N-diméthyl acétamide, N-méthylpyrrolidinone, N-diméthyl proprionamide) et d’une série d’aldéhydes aromatiques (2,4-diméthyl benzaldéhyde, 2,5-diméthyl benzaldéhyde, 2,6-diméthyl benzaldéhyde, 3,4-diméthyl benzaldéhyde et 3,5-diméthyl benzaldéhyde). Pour réaliser ce travail différentes techniques expérimentales ont été utilisées. Nous avons déterminé le spectre d’absorption UV du radical benzylperoxyle et les constantes de vitesse des réactions mutuelle et croisée avec HO2 en fonction de la température (298-353 K) en utilisant la technique de photolyse laser couplée à une détection spectroscopie UV-visible. La constante de vitesse de la réaction des amides avec le radical NO3 a été déterminée en fonction de la température (277-353 K), en utilisant la même technique. Ce travail présente la première étude cinétique des amides avec NO3 en fonction de la température. Les sections efficaces d’absorption des aldéhydes ont été mesurées par spectrométrie d’absorption UV-Visible. La constante de vitesse de la réaction des aldéhydes avec l’atome Cl a été déterminée à température ambiante en utilisant la Chambre de Simulation Atmosphérique. Les analyses ont été réalisées par Chromatographie en Phase Gazeuse (CPG). Il s’agit d’une première détermination de ces constantes de vitesse. L’ensemble des résultats est discuté et nous a permis d’évaluer les implications atmosphériques de ces COV (durée de vie et impact sur l’environnement)
The purpose of this thesis is to determine the atmospheric fate of a number of VOCs widely used in different applications or directly produced into the troposphere by degradation of other VOCs. We have studied the degradation of benzylperoxy radical, a series of amides (N-dimethyl formamide, N-dimethyl acetamide, N-methylpyrrolidinone, N-dimethyl proprionamide) and a series of aromatic adehydes (2,4-dimethyl benzaldehyde, 2,5-dimethyl benzaldehyde, 2,6-dimethyl benzaldehyde, 3,4-dimethyl benzaldehyde and 3,5-dimethyl benzaldehyde). This work has been realised using several experimental techniques. We have determined the UV spectrum of benzylperoxy radical and the rate constants of the self reaction and the cross reaction with HO2 as a function of temperature (298-353 K) by using the laser photolysis technique with time resolved absorption UV-visible spectroscopy. The reaction rate constants of amides with NO3 radical have been determined as a function of temperature (277-353 K), by using the laser photolysis technique. This work provides the first kinetic study for the reaction of amides with NO3 as function of temperature. The absorption cross sections of aldehydes have been measured by UV-Visible spectrometry. The rate constants of the reaction of aldehydes with Cl atom have been determined at room temperature by using smog chambers. The analyses have been realized by Gas phase chromatography. This work represents the first reported kinetic study of the reaction of Cl atoms with these aldehydes. The whole results are discussed in order to assess the atmospheric implications of the compounds investigated (lifetimes and environmental impact)
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Books on the topic "Chlora nitrone"

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Vsesoi͡uznyĭ Bakhovskiĭ kollokvium (9th 1995 Moscow, Russia). 9-ĭ Bakhovskiĭ kollokvium po azotfiksat͡sii, posvi͡ashchennyĭ pami͡ati chlena-korrespondenta RAN V.L. Kretovicha: Tezisy dokladov, Moskva, 24-26 i͡anvari͡a 1995 g. Pushchino: ONTI PNT͡S RAN, 1995.

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Conkling, John A. Chemistry of pyrotechnics: Basic priniciples and theory. New York: M. Dekker, 1985.

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9-i Bakhovskii kollokvium po azotfiksatsii, posviashchennyi pamiati chlena-korrespondenta RAN V.L. Kretovicha: Tezisy dokladov, Moskva, 24-26 ianvaria 1995 g. ONTI PNTS RAN, 1995.

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McKenzie, Alistair G. The history of anaesthesia. Edited by Philip M. Hopkins. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199642045.003.0031.

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Even though ether was prepared in 1540 and nitrous oxide in 1774, it was not until the 1840s that these agents were used to induce anaesthesia to enable painless surgery. Modern inhalation anaesthesia has evolved from the public demonstration of ether anaesthesia by William Morton at the Massachusetts General Hospital, Boston, United States, on 16 October 1846. In the United Kingdom, from 1847 John Snow applied scientific principles to develop safer anaesthetic practice. Newer and safer agents have replaced ether in most countries. Successful intravenous anaesthesia began with chloral hydrate in 1874; progress was hesitant until the wide acceptance of thiopental from 1934—in turn superseded by propofol from 1985. Regional anaesthesia has evolved from the first use of the local anaesthetic, cocaine, to enable awake eye surgery by Carl Koller in 1884. This progressed to nerve blocks, spinal and epidural anaesthesia with a high degree of sophistication, through provision of better and safer local anaesthetics: lidocaine and bupivacaine. The introduction of neuromuscular blocking agents into anaesthetic practice began with the use of curare by Griffith and Johnson in Montreal in 1942. Muscle relaxation became a component of ‘balanced anaesthesia’—necessitating advances in airway management, including tracheal intubation and safe mechanical ventilation of the lungs. The modern anaesthetic workstation for inhalation anaesthesia has evolved from the early anaesthetic machines over 100 years. Of all the advances in anaesthesia during the past 50 years, developments in monitoring techniques—particularly pulse oximetry and capnography—have probably made the greatest contribution to patient safety. Anaesthetists have embraced enhanced postoperative recovery.
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Conkling, John A. Chemistry of Pyrotechnics: Basic Principles and Theory, Second Edition. 2nd ed. CRC, 2015.

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Book chapters on the topic "Chlora nitrone"

1

Winkelmann, J. "Diffusion of chloro-ethene (1); nitrogen (2)." In Gases in Gases, Liquids and their Mixtures, 879. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-49718-9_585.

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Winkelmann, J. "Diffusion of nitrogen (1); chloro-methane (2)." In Gases in Gases, Liquids and their Mixtures, 1490. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-49718-9_1120.

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Collman, J. P., N. W. Hoffman, J. W. Hosking, and George W. Parshall. "trans -Chloro(nitrogen)-bis(triphenylphosphine)iridium (I)." In Inorganic Syntheses, 8–11. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470132432.ch2.

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Winkelmann, J. "Diffusion of chloro-difluoro-methane (1); nitrogen (2)." In Gases in Gases, Liquids and their Mixtures, 778. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-49718-9_500.

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Black, Stephen. "The sulphur, phosphorus, nitrogen and chlor-alkali industries." In The Chemical Industry, 189–213. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1318-2_6.

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Browning, D. R. "The Chlor-Alkali, Sulphur, Nitrogen and Phosphorus Industries." In The Chemical Industry, 126–68. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4615-8541-1_4.

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Demaison, J. "280 C3H4ClNO (1E)-1-Chloro-2-nitroso-1-propene." In Asymmetric Top Molecules. Part 2, 61. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-10400-8_28.

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Bährle-Rapp, Marina. "2-Chloro-5-Nitro-N-Hydroxyethyl P-Phenylenediamine." In Springer Lexikon Kosmetik und Körperpflege, 104. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_1904.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of nickel(II) chloro complex with nitrogen donor macrocyclic ligand." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 3, 487–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2021. http://dx.doi.org/10.1007/978-3-662-62470-8_208.

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Abramovich-Bar, Sara, Yair Bamberger, Mark Ravreby, and Shlomo Levy. "Applications of Ion Chromatography for Determination and Identification of Chlorate, Nitrite and Nitrate in Explosives and Explosive Residues." In Advances in Analysis and Detection of Explosives, 41–54. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-017-0639-1_5.

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Conference papers on the topic "Chlora nitrone"

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Zelenskaya, Veronika, Ruslan Baichurin, Vladislav Sergeev, and Sergey Makarenko. "FEATURES OF THE INTERACTION OF 1-ACETYL-1-NITRO-4-PHENYL-1,3-BUTADIENE WITH 4-METHYL(CHLORO)THIOPHENOLS." In Chemistry of nitro compounds and related nitrogen-oxygen systems. LLC MAKS Press, 2019. http://dx.doi.org/10.29003/m785.aks-2019/322-324.

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Kepeňová, Martina, Michaela Benediková, Mária Vilková, Miroslava Litecká, and Ivan Potočňák. "Ionic palladium(II) complexes with nitro and halogen derivatives of 8-hydroxyquinoline." In 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.443k.

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Four commercially unavailable derivatives of 8-hydroxyquinoline with different functional groups (nitro and halogen) in positions 5 and 7 were prepared: 5-nitro-7-iodo-8-hydroxyquinoline (HNIQ), 5-nitro-7-bromo-8-hydroxyquinoline (HNBrQ), 5-iodo-7-bromo-8-hydroxyquinoline (HIBrQ) and 5-chloro-7-bromo-8-hydroxyquinoline (HClBrQ). Their characterization was performed by IR and NMR spectroscopy, elemental analysis and in the case of HIBrQ and HClBrQ by single crystal X-ray structure analysis. Prepared compounds were used for the synthesis of new palladium(II) complexes NH2(CH3)2[PdCl2(XQ)], where XQ = NIQ (1), NBrQ (2), IBrQ (3) and ClBrQ (4). IR and NMR spectroscopy, elemental and X-ray structure analysis were used for their characterization. Bidentate chelate coordination of one molecule of XQ through nitrogen and oxygen atoms in square planar complexes was found. These complexes represent a group of compounds in which biological activities were found and will be used for the following biological study.
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Potočňák, Ivan, Miroslava Litecká, Jitka Prachařová, Monika Hreusová, and Jana Kašpárková. "Anticancer gallium(III) complexes with halogen- and nitroderivatives of 8- hydroxyquinoline." In 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.451p.

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Six gallium(III) complexes with halogen- or nitroderivatives of 8-hydroxyquinoline, [Ga(ClQ)3] (1), [Ga(BrQ)3] (2), [Ga(dIQ)3] (3), [Ga(CQ)3] (4), [Ga(NQ)3] (5) and [Ga(ClNQ)3]·MeOH were prepared as possible anticancer drugs (HClQ = 5-chloro-8-hydroxyquinoline, HBrQ = 7-bromo-8-roxyquinoline, HdIQ = 5,7-diiodo-8-hydroxyquinoline, HCQ = 5-chloro-7-iodo-8-ydroxyquinoline, HNQ = 5-nitro-8-hydroxyquinoline and HClNQ = 5-chloro-7-nitro-8-hydroxyquinoline). X-ray single crystal structure analysis of [Ga(ClQ)3]·MeOH (1 – MeOH) and 5 showed that both complexes are molecular complexes with Ga(III) coordinated in mer-fashion by N- and O-donor atoms of three ClQ and NQ ligands, respectively. The in vitro antiproliferative activity of 1 and 5 was evaluated against the human ovarian carcinoma cisplatin-sensitive A2780, breast carcinoma MDA-MB-231, and human colorectal carcinoma HCT-116 cell lines and their selectivity was verified on MRC5 pd30 cells from normal lung tissue. Complexes 1 and 5 display higher antiproliferative activity (IC50 values in the range 2.1–7 μM) compared to the respective ligands, used Ga(III) salts, cisplatin and oxaliplatin, and a significant selective antiproliferative potency (IC50 = 149 and 32 μM, respectively for MRC5pd30 cell line).
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Wang, Caolin, Yiqiang Ouyang, and Zhou Lan. "Synthesis of N-(3-chloro-4-fluorophenyl)-6-nitro-7-((tetrahydrofuran-3-yl) oxy) quinazolin-4-amine." In 2016 7th International Conference on Education, Management, Computer and Medicine (EMCM 2016). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/emcm-16.2017.115.

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Mátyus, Péter, Olivér Éliás, Lázló Károlyházy, Géza Stájer, Veronika Harmath, and Orsolya Barabás. "Ring Closure Reactions of 4-Chloro-5-hydroxyalkylamino-6-nitro-3(2H)- pyridazinones: Synthesis of Novel Pyridazino-Fused Ring Systems." In The 4th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland: MDPI, 2000. http://dx.doi.org/10.3390/ecsoc-4-01820.

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Ibrahim, Mohamed Mustafa, Hapipah Mohd Ali, and Mahmood Ameen Abdullah. "Synthesis, Characterization And Antiulcerogenic Activity Of Zinc (Ii), Copper (Ii) And Nickel (Ii) Complexes With Schiff Base Ligands Derived From Tryptamine And 5-Chloro, 5-Nitro, 3,5 Ditertiarybutyl Salicylaldehyde." In Annual International Conference on Chemistry, Chemical Engineering and Chemical Process. Global Science & Technology Forum (GSTF), 2015. http://dx.doi.org/10.5176/2301-3761_ccecp15.25.

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