Relevant bibliographies by topics / Aromatico

Academic literature on the topic 'Aromatico'

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Published: 11 March 2023

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Journal articles on the topic "Aromatico"

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Lanati, Donato, Dora Marchi, Giacomo Mazza, Desislava Baicheva, and Alberto La Rosa. "Profilo aromatico varietale delle uve Mavrud, Bouquet e Rubin." BIO Web of Conferences 9 (2017): 02035. http://dx.doi.org/10.1051/bioconf/20170902035.

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Tang, Jianhong, Jiarong Li, Lijun Zhang, Shuling Ma, Daxin Shi, Qi Zhang, Liupan Yang, Xiuzhen Wang, Xuan Liu, and Change Liu. "The Divergent Transformations of Aromatico-Aminonitrile with Carbonyl Compound." Journal of Heterocyclic Chemistry 49, no. 3 (May 2012): 533–42. http://dx.doi.org/10.1002/jhet.804.

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Naidu, Devendra, and Stephen W. Ragsdale. "Characterization of a Three-Component Vanillate O-Demethylase from Moorella thermoacetica." Journal of Bacteriology 183, no. 11 (June 1, 2001): 3276–81. http://dx.doi.org/10.1128/jb.183.11.3276-3281.2001.

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ABSTRACT The Moorella thermoacetica aromaticO-demethylase was characterized as an inducible three-component system with similarity to the methanogenic methanol, methylamine, and methanethiol methyltransferases and to theO-demethylase system from Acetobacterium dehalogenans. MtvB catalyzes methyl transfer from a phenylmethylether to the cobalt center of MtvC, a corrinoid protein. MtvA catalyzes transmethylation from MtvC to tetrahydrofolate, forming methyltetrahydrofolate. Cobalamin can substitute for MtvC.
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Machovina, Melodie M., Sam J. B. Mallinson, Brandon C. Knott, Alexander W. Meyers, Marc Garcia-Borràs, Lintao Bu, Japheth E. Gado, et al. "Enabling microbial syringol conversion through structure-guided protein engineering." Proceedings of the National Academy of Sciences 116, no. 28 (June 24, 2019): 13970–76. http://dx.doi.org/10.1073/pnas.1820001116.

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Microbial conversion of aromatic compounds is an emerging and promising strategy for valorization of the plant biopolymer lignin. A critical and often rate-limiting reaction in aromatic catabolism isO-aryl-demethylation of the abundant aromatic methoxy groups in lignin to form diols, which enables subsequent oxidative aromatic ring-opening. Recently, a cytochrome P450 system, GcoAB, was discovered to demethylate guaiacol (2-methoxyphenol), which can be produced from coniferyl alcohol-derived lignin, to form catechol. However, native GcoAB has minimal ability to demethylate syringol (2,6-dimethoxyphenol), the analogous compound that can be produced from sinapyl alcohol-derived lignin. Despite the abundance of sinapyl alcohol-based lignin in plants, no pathway for syringol catabolism has been reported to date. Here we used structure-guided protein engineering to enable microbial syringol utilization with GcoAB. Specifically, a phenylalanine residue (GcoA-F169) interferes with the binding of syringol in the active site, and on mutation to smaller amino acids, efficient syringolO-demethylation is achieved. Crystallography indicates that syringol adopts a productive binding pose in the variant, which molecular dynamics simulations trace to the elimination of steric clash between the highly flexible side chain of GcoA-F169 and the additional methoxy group of syringol. Finally, we demonstrate in vivo syringol turnover inPseudomonas putidaKT2440 with the GcoA-F169A variant. Taken together, our findings highlight the significant potential and plasticity of cytochrome P450 aromaticO-demethylases in the biological conversion of lignin-derived aromatic compounds.
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Yang, Junjuan, Daxin Shi, Mingxing Liu, Lijun Zhang, Qi Zhang, and Jiarong Li. "Structure of the Condensed Product of Aromatico-Aminonitrile with Carbonyl Compound and Its Mechanism." Chinese Journal of Organic Chemistry 34, no. 12 (2014): 2424. http://dx.doi.org/10.6023/cjoc201406007.

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Kancherla, Sindhu, Marianne Lorentzen, Victor Snieckus, and Kåre B. Jørgensen. "Directedortho-Metalation and Anionicortho-Fries Rearrangement of Polycyclic AromaticO-Carbamates: Regioselective Synthesis of Substituted Chrysenes." Journal of Organic Chemistry 83, no. 7 (March 15, 2018): 3590–98. http://dx.doi.org/10.1021/acs.joc.7b03210.

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Shuvaev, Sergey, Ivan S. Bushmarinov, Ilya Sinev, Artem O. Dmitrienko, Konstantin A. Lyssenko, Vladimir Baulin, Wolfgang Grünert, Aslan Yu Tsivadze, and Natalia Kuzmina. "Copper(II) Complexes with Aromatico-Phosphorylated Phenols - Synthesis, Crystal Structures, and X-ray Photoelectron Spectroscopy." European Journal of Inorganic Chemistry 2013, no. 27 (July 10, 2013): 4823–31. http://dx.doi.org/10.1002/ejic.201300540.

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Kudlich, Michael, Malcolm J. Hetheridge, Hans-Joachim Knackmuss, and Andreas Stolz. "Autoxidation Reactions of Different Aromatico-Aminohydroxynaphthalenes That Are Formed during the Anaerobic Reduction of Sulfonated Azo Dyes." Environmental Science & Technology 33, no. 6 (March 1999): 896–901. http://dx.doi.org/10.1021/es9808346.

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Zhao, Kai Yun, Dong Bei Yue, and Ting Yang. "Characterization of Aromatics at Working Surface of a Municipal Solid Waste Landfill." Applied Mechanics and Materials 768 (June 2015): 458–64. http://dx.doi.org/10.4028/www.scientific.net/amm.768.458.

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With the rapid urbanization and economic growth in China especially near 2 decades, the vast amount of municipal solid waste (MSW) were produced annually. Landfills are the predominant disposal sites for MSW in China, receiving more than 75% of the collected MSW every year. While the volume concentration is usually less than 1%, NMOCs are generally considered as the main source of the odorous problem at MSW landfills, because they include many compounds with very low odor thresholds. What’s more, aromatics is vital part of NMOCs for its toxic effect, which contains Benzene. The main objective of this study was to understand the comprehensive behavior of aromatics of landfill gas. In this work we present an integrated evaluation of working surface concentration distribution and emission rate of a municipal solid waste landfill. And in order to understand the transportation of aromatic, a new parameter was introduced to analyze this process. Thus, result shows, the fugitive emission of aromatics in the operating surface may need pay more attention. The highest average concentration for aromatics was found in autumn. Aromatic’s emission rate in winter was larger than autumn, the highest emission rate of aromatics toluene, 0.011g/m2/h. The B:T ratio in winter was significant higher that of other seasons.
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Lu, Zhengyu, Qin Zhu, Yuanting Cai, Zhixin Chen, Kaiyue Zhuo, Jun Zhu, Hong Zhang, and Haiping Xia. "Access to tetracyclic aromatics with bridgehead metals via metalla-click reactions." Science Advances 6, no. 3 (January 2020): eaay2535. http://dx.doi.org/10.1126/sciadv.aay2535.

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The never-ending pursuits for exploring aromatic molecular architectures result in the large libraries of aromatics with fascinating structures, which have greatly broadened the scope of aromaticity. Despite extensive efforts that have been paid to develop aromatic frameworks, the construction of polycyclic aromatics that share a bridgehead atom with more than three rings has never been accomplished. Here, an unprecedented family of aromatics, in which a metal center shared by 4 five-membered aromatic rings, has been achieved by using the metalla-click reactions with excellent yields and remarkable regioselectivity. The distinctive tetracyclic aromatics exhibit a broad absorption in the ultraviolet-visible near-infrared region and excellent thermal stability in air, enabling their potential applications in photoelectric materials and biomedicine. This study now makes it possible to incorporate four aromatic rings with one common sharing metal center by a straightforward strategy that would promote further development of previously unknown polycyclic complex motifs in aromatic chemistry.
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Dissertations / Theses on the topic "Aromatico"

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Oliveira, Alessandra Lopes de. "Extração supercritica de oleo aromatico de cafe torrado." [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/256375.

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Orientadores : Fernando Antonio Cabral, Marcos Nogueira Eberlin
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos
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Doutor em Engenharia de Alimentos
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2

Carrero, Diego Alejandro Silva. "Prospesçao química e farmacológica das folhas de Nicandra physalodes Garent (L)." reponame:Repositório Institucional da UFC, 2016. http://www.repositorio.ufc.br/handle/riufc/22398.

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CARRERO, Diego Alejandro Silva. Prospesçao química e farmacológica das folhas de Nicandra physalodes Garent (L). 2016. 155 f. Dissertação (Mestrado em Química)-Universidade Federal do Ceará, Fortaleza, 2016.
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This work describes the isolation and characterization of nine compounds isolated from dichloromethane and ethyl acetate from leaves of Nicandra physalodes. The study was initiated with extract preparations, followed by successive classics chromatographic fractionations as: chromatography over silica gel, Sephadex LH- 20 gel and C18 cartridge solid phase extraction (SPE), as well as high-performance liquid chromatography (HPLC). The isolated compounds were analyzed by spectroscopic techniques 1H and 13C NMR, one and two-dimensional, and spectrometric techniques as IR and HR-ESI-MS. In total were isolated nine withanolides which are derivates from ergostane skeleton, being four belonging withanolides to group II, named as Np1, Np2, Np7 and Np9 (withanolides with the basic skeleton modified) and five belonging to group I, named as Np3, Np4, Np5, Np6 and Np8 (withanolides with the basic skeleton unmodified). According with a literature survey compounds nic-10 (Np1), nicandrenone (Np2), nic-7 (Np3), nic-2 (Np4) and nicaphysaline B (Np5) were previously reported to this species, but compounds 15 oxo-nicaphysaline B (Np6), 6-7dihidroxy-nicandrenone-10, (Np7), 24 -25dihidroxy-nicandrenone-2 (Np8), and 17-(1-metylpropan-2-one)- nicandrenone-10 (Np9) are being reported for the first time in the literature. Biological assays (antimicrobial, antifungal and larvicidal) were performed for the main compounds; however, the results were either negative or weakly active.
Neste trabalho é descrito o isolamento e caracterização de nove compostos isolados dos extratos diclorometano e acetato de etila, obtidos das folhas de Nicandra physalodes. O estudo foi iniciado com a preparação dos extratos, seguido de sucessivos fracionamentos cromatográficos clássicos como: cromatografia em coluna aberta utilizando sílica gel, gel de dextrana Sephadex LH-20, cartucho C-18 (SPE), além de cromatografia líquida de alta eficiência (CLAE). Os compostos isolados foram caracterizados através de técnicas espectroscópicas como RMN de 1H e 13C, uni e bidimensional, além de técnicas espectrométricas como IV e EMAR-ESI. No total foram isolados nove vitanolidos que são derivados do esqueleto ergostano, sendo quatro pertencentes ao grupo II, denominados Np1, Np2, Np7 e Np9 (vitanolidos com esqueleto base modificado) e cinco pertencentes ao grupo I, denominados Np3, Np4, Np5, Np6 e Np8 (vitanolidos com esqueleto base não modificado). De acordo com pesquisas realizadas na literatura e mediante comparação com dados de RMN de 1H e 13C, os compostos nic-10 (Np1), nicandrenona (Np2), nic-7 (Np3), nic-2 (Np4) e nicafisalina B (Np5), já haviam sido relatados na espécie, enquanto os compostos denominados como 15-oxo-nicafisalina B (Np6), 6-7dihidróxi-nicandrenona-10, (Np7), 24-25dihidróxi-nicandrenona-2, (Np8) e 17-(1-metilpropan-2-ona)-nicandrenona-10 (Np9), estão sendo relatados pela primeira vez. Foram realizados ensaios antimicrobiano, antifúngico e larvicida com os compostos isolados em maiores quantidades, porém os resultados forma negativos, ou fracamente ativos.
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Fernandes, Sergio Antonio. "Aplicação da RMN de 1H para prever regiosseletividade do rearranjo de Claisen aromatico." [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/248652.

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Orientador : Anita Jocelyne Marsaioli
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica
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4

Trivellini, Nicola. "Nuovi copoliesteri aromatico-alifatici da fonte rinnovabile contenenti atomi di zolfo: relazione proprietà-struttura." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13433/.

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To date, in view of the continued growth of the production and use of plastic materials, the exploitation of non-renewable sources for their implementation and subsequent disposal of these huge piers, are extremely current issues and still far from being resolved. In parallel, the world of research, as well as that of industry, are moving more and more towards solutions that reduce the environmental impact as much as possible, both in terms of resource use, that of terrestrial and marine environmental protection. In this direction bioplastics, i.e. plastics from renewable sources or biodegradable (or both) and possibly recyclable, represent a highly sustainable answer to these problems. A monomer from renewable sources which allows the realization of polymers with excellent mechanical and barrier properties is the 2,5-furandicarbossilico acid, whose polyesters are not, however, biodegradable. Conversely, aromatic/aliphatic biodegradable copolymers are already present on the market, but they are not completely obtainable from renewable sources. In this context, the present research work focused on the study of new aromatic/aliphatic copolymers completely bio-based and biodegradable. The synthesized materials were also subjected to several analyzes, in order to study their properties in relation to possible industrial applications as substitutes for Ecoflex. In particular, they have been characterized from the structural, thermal, mechanical, point of view and finally it was evaluated their compostability. The results obtained have been correlated to chemical structure, i.e to copolymer composition.
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Gamberini, Lorenzo. "Effetti del diametro sul profilo aromatico di salami fermentati impiegando due diverse colture starter." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14138/.

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Molti fattori contribuiscono alla formazione delle caratteristiche "tipiche" dei salami e tra questi l’impiego di colture starter e il diametro del budello svolgono un ruolo rilevante. Infatti il tipo di microrganismi presenti e la dimensione del prodotto influenzano importanti eventi che avvengono durante la maturazione (calo peso, attività proteoliche e lipolitiche) e che portano alla formazione di composti volatili. Recentemente, è stata studiata l’influenza del diametro sulle caratteristiche chimico-fisiche e aromatiche di salami a fine maturazione ma questi prodotti provenivano da materie prime differenti ed erano prodotti attraverso processi diversi. A seguito di questo lavoro preliminare, è stato effettuato un lavoro più ampio mirato alla valutazione dell'effetto del diametro e di due diverse colture starter sulla popolazione microbica e sulle caratteristiche chimico-fisiche in salami prodotti industrialmente. I prodotti sono stati periodicamente analizzati e nel corso del mio elaborato abbiamo studiato l’impatto delle variabili considerate (diametro e starter) sul profilo in molecole volatili e sulle caratteristiche organolettiche dei salami ottenuti. Dai risultati è emerso che l’aroma si differenziava principalmente in relazione al diametro e ciò può essere attribuito sia alle diverse tempistiche richieste per arrivare al prodotto finito, sia alla minore disponibilità di ossigeno nei campioni a diametro maggiore. L’influenza dello starter impiegato era invece inferiore. Questo potrebbe essere dovuto al fatto che per tutti i campioni sono state adottate condizioni industriali di fermentazione e maturazione non specifiche e quindi non adatte ad esaltare le peculiarità fisiologiche dei ceppi impiegati. Ciò sottolinea la necessità di ulteriori studi per ottimizzare le prestazioni degli starter in relazione al processo al fine di massimizzare le peculiarità dei prodotti, difendendone la differenziazione come un valore, oltre che economico, anche culturale.
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Quental, Antonio Carlos. "Blendas de PHB e PETG : Formação de um copoliester aromatico/alifatico via processamento reativo." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/248784.

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Orientador: Maria Isabel Felisberti
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Quimica
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Doutorado
Físico-Química
Doutor em Quimica
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Mondati, Giulia. "Profilo aromatico e analitico di vino Sangiovese biodinamico di diverse annate in relazione all'andamento climatico." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/22065/.

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L’obbiettivo che questo studio si pone è quello di correlare gli effetti metereologici con il profilo aromatico e analitico del vino. Per la sua realizzazione sono stati utilizzati sei campioni di vino sangiovese di annate differenti, dal 2012 al 2017, provenienti dalla stessa azienda e con lo stesso uvaggio, a cui sono state applicate le medesime tecniche di vinificazione. In riferimento a questi campioni sono state raccolte le informazioni metereologiche che interessano l’intero anno, per tutti i sei anni consecutivi, e quindi dall’ingresso in dormienza della pianta fino al momento della raccolta. Nello specifico i parametri climatici valutati sono stati: temperatura, precipitazioni, bagnatura fogliare Umidità relativa, radiazione solare. Tali dati sono stati confrontati con i con i parametri enologici di base e con il profilo in molecole volatili di ciascun vino in ciascuna annata. U risultati hanno evidenziato la sussistenza di una relazione tra umidità relativa e tenore alcolico ottenuto dei vini; in particolare l’annata 2014, che ha mostrato i valori di umidità relativa dell’aria più elevata nei mesi di agosto e settembre, è stata caratterizzata da un vino con il minore tenore alcolico. Viceversa le annate più secche nei mesi della maturazione (2016 e 2017) hanno contribuito positivamente al grado alcolico del vino. Per quanto riguarda il profilo in molecole volatili, il confronto delle diverse annate ha evidenziato come, sotto il profilo qualitativo, i vini siano caratterizzati da composti di aromi differenti, presenti in diverse proporzioni e in funzione dell’annata. Nello specifico il campione caratterizzato dal maggiore accumulo di composti ad alto impatto olfattivo è il 2014.
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Antoni, Inaldo de. "Influencia dos microorganismos Staphilococcus xylosus, Lactobacillus plantarum e Staphylococcus carnosus no perfil aromatico de salames de peru." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255239.

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Orientador: Nelson J. Beraquet
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos
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Doutorado
Tecnologia de Alimentos
Doutor em Tecnologia de Alimentos
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DOMENEGHETTI, DANIELE. "Studio del profilo polifenolico ed aromatico di vini rossi da vitigni di antica coltivazione della Valle d'Aosta." Doctoral thesis, Università Cattolica del Sacro Cuore, 2007. http://hdl.handle.net/10280/73.

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La Valle d'Aosta, pur non avendo grandi superfici destinate alla viticoltura, è caratterizzata dalla presenza di un ricco patrimonio ampelografico di cui fanno parte dodici varietà autoctone a bacca rossa: Bonda, Cornalin, Crovassa, Fumin, Mayolet, Ner d'Ala, Petit rouge, Premetta, Roussin, Roussin de Morgex, Vien de Nus e Vuillermin. Malgrado i numerosi vitigni menzionati, nella produzione dei vini a D.O.C troviamo in prevalenza il Petit rouge e poche altre varietà che, nell'insieme, rappresentano circa il 34% della produzione totale. Al fine di implementare la presenza di prodotti tipici che esprimano i caratteri distintivi della zona di provenienza sono state approfondite le conoscenze dei vitigni autoctoni per evidenziarne le attitudini e le potenzialità per la produzione di vini rossi di qualità. Allo stesso scopo sono stati valutati gli effetti dell'applicazione di alcune tecniche di vinificazione alternative sull'espressione dei caratteri qualitativi del Petit rouge, le cui uve sono da tempo vinificate in purezza o in assemblaggi nella produzione di vini a D.O.C.
Aosta Valley has a little viticulture surface and it is characterised by a rich ampelographic collection including the following twelve red grape autochthonous varieties: Bonda, Cornalin, Crovassa, Fumin, Mayolet, Ner d'Ala, Petit rouge, Premetta, Roussin, Roussin de Morgex, Vien de Nus e Vuillermin. Only the 34% of the D.O.C. wine production is represented by some of the above mentioned cultivars, in particular the Petit Rouge, despite of the huge number of cultivars. The Petit rouge is used in purity or in miscellaneous in the D.O.C. wine production. In order to implement the presence of typical products, this study was carried out to evaluate the aptitude of Aosta Valley ancient grapes to produce quality red wines. Moreover to improve quality of the most diffused Aosta Valley red wine the effects of some alternative winemaking were evaluated on the Petit rouge characters.
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DOMENEGHETTI, DANIELE. "Studio del profilo polifenolico ed aromatico di vini rossi da vitigni di antica coltivazione della Valle d'Aosta." Doctoral thesis, Università Cattolica del Sacro Cuore, 2007. http://hdl.handle.net/10280/73.

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La Valle d'Aosta, pur non avendo grandi superfici destinate alla viticoltura, è caratterizzata dalla presenza di un ricco patrimonio ampelografico di cui fanno parte dodici varietà autoctone a bacca rossa: Bonda, Cornalin, Crovassa, Fumin, Mayolet, Ner d'Ala, Petit rouge, Premetta, Roussin, Roussin de Morgex, Vien de Nus e Vuillermin. Malgrado i numerosi vitigni menzionati, nella produzione dei vini a D.O.C troviamo in prevalenza il Petit rouge e poche altre varietà che, nell'insieme, rappresentano circa il 34% della produzione totale. Al fine di implementare la presenza di prodotti tipici che esprimano i caratteri distintivi della zona di provenienza sono state approfondite le conoscenze dei vitigni autoctoni per evidenziarne le attitudini e le potenzialità per la produzione di vini rossi di qualità. Allo stesso scopo sono stati valutati gli effetti dell'applicazione di alcune tecniche di vinificazione alternative sull'espressione dei caratteri qualitativi del Petit rouge, le cui uve sono da tempo vinificate in purezza o in assemblaggi nella produzione di vini a D.O.C.
Aosta Valley has a little viticulture surface and it is characterised by a rich ampelographic collection including the following twelve red grape autochthonous varieties: Bonda, Cornalin, Crovassa, Fumin, Mayolet, Ner d'Ala, Petit rouge, Premetta, Roussin, Roussin de Morgex, Vien de Nus e Vuillermin. Only the 34% of the D.O.C. wine production is represented by some of the above mentioned cultivars, in particular the Petit Rouge, despite of the huge number of cultivars. The Petit rouge is used in purity or in miscellaneous in the D.O.C. wine production. In order to implement the presence of typical products, this study was carried out to evaluate the aptitude of Aosta Valley ancient grapes to produce quality red wines. Moreover to improve quality of the most diffused Aosta Valley red wine the effects of some alternative winemaking were evaluated on the Petit rouge characters.
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Books on the topic "Aromatico"

1

Marcello, I. Composti aromatico polinucleari: Propietà chimico-fisiche, tossicologia, ecotossicologia, epidemiologia, valutazioni. Roma: Istituto superiore di sanità, 1990.

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Zema, Maria. La millenaria storia dell'alloro: Dal santuario di Delfi al rametto aromatico : magia, divinazione, sacralità, virtù terapeutiche. Catanzaro Lido (Catanzaro): Max, 2008.

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Zema, Maria. La millenaria storia dell'alloro: Dal santuario di Delfi al rametto aromatico : magia, divinazione, sacralità, virtù terapeutiche. Catanzaro Lido (Catanzaro): Max, 2008.

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Flanders, Angela. Aromatics. New York: Clarkson N. Potter, 1995.

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Raftery, James P. Primary aromatics. Washington, DC: Office of Industries, U.S. International Trade Commission, 1994.

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Shaw, Robert Burns. Aromatics: Poems. Montrose, Colorado: Pinyon Publishing, 2011.

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Aromatic chemistry. Oxford: Oxford University Press, 1992.

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Abel, E. W., ed. Aromatic Chemistry. Cambridge: Royal Society of Chemistry, 2007. http://dx.doi.org/10.1039/9781847550163.

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Johnson, Darren W., and Fraser Hof, eds. Aromatic Interactions. Cambridge: Royal Society of Chemistry, 2016. http://dx.doi.org/10.1039/9781782626626.

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Sainsbury, M. Aromatic chemistry. Oxford: Oxford University Press, 1992.

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Book chapters on the topic "Aromatico"

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Pessoa, João Costa, Isabel Correia, and Pedro Adão. "Vanadium(IV) Complexes Derived from AromaticO-Hydroxyaldehydes and Tyrosine Derivatives: Catalytic Evaluation in Sulfoxidations." In Advances in Organometallic Chemistry and Catalysis, 227–32. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118742952.ch17.

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Gooch, Jan W. "Aromatics." In Encyclopedic Dictionary of Polymers, 48. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_797.

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van der Linde, P. R., and H. A. J. Oonk. "Aromatics." In Physical Chemistry in Action, 79–106. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-68727-4_5.

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Bährle-Rapp, Marina. "aromatic." In Springer Lexikon Kosmetik und Körperpflege, 46. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_806.

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Scott, L. Ridgway, and Ariel Fernández. "Aromatic Interactions." In A Mathematical Approach to Protein Biophysics, 191–98. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-66032-5_12.

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Leak, David J., Ying Yin, Jun-Jie Zhang, and Ning-Yi Zhou. "Aromatic Oxidations." In Enzyme Catalysis in Organic Synthesis, 1487–533. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527639861.ch34.

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Guisnet, Michel, and Matteo Guidotti. "Aromatic Acetylation." In Catalysts for Fine Chemical Synthesis, 69–94. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470094214.ch3.

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Geneste, Patrick, and Annie Finiels. "Aromatic Benzoylation." In Catalysts for Fine Chemical Synthesis, 95–104. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/0470094214.ch4.

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Reddy, P. Parvatha. "Aromatic Plants." In Biointensive Integrated Pest Management in Horticultural Ecosystems, 213–17. New Delhi: Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-1844-9_16.

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Cleaves, Henderson James. "Aromatic Hydrocarbon." In Encyclopedia of Astrobiology, 85–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11274-4_106.

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Conference papers on the topic "Aromatico"

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Moliere, Michel, and Frederic Geiger. "Gas Turbines in Alternative Fuel Applications: The Utilization of Highly Aromatic Fuels in Power Generation." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-53272.

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Heavy Duty Gas Turbines enjoy a wide fuel capability that makes them increasingly popular power generation tools in several branches of the industry. Among Alternative Fuels for gas turbines is a group of “Aromatic Fuels”. These fuels are presently virtually unknown but they offer interesting prospects namely for captive power in the refining and petrochemistry. Until now there has been a limited awareness of the combustion issues posed by Aromatic Fuels especially in the high temperature, medium pressure conditions of gas turbine combustors. This apparent disinterest is tied to various issues namely: - smoke problems faced by the aviation sector during the 70’s that were caused by “aromatic jet fuels”; - the supremacy of natural gas that monopolizes R&D combustion efforts for power applications. The success of light aromatics in spark engines as substitutes for lead-based RON improvers has been stopped by the ban of aromatics in car fuels. Toxicity is thus another blemish of aromatic fuels. Chemically, aromatic fuels involve a wide diversity of molecules in structure and size, ranging from simple mono-aromatics (one benzene ring) to poly-aromatics (up to 3 condensed benzene rings). The general combustion problem posed by aromatic fuels lies in the high thermal stability of the benzene ring in oxidative conditions and its propensity to condense on itself and to form soot particles. In addition, the high Auto Ignition Temperature and Delay of Aromatic Fuels make them improper for combustion in Diesel engines and require large residence time in atmospheric flames. Interestingly, it appears that, with their hot and lean diffusion flames and relatively oxidizing combustion zones, Heavy Duty Gas Turbines exhibit a remarkable ability to break and cleanly burn out these molecules. The paper presents this new class of gas turbine fuels, outlines their market rationale and offers key combustion considerations to ensure clean utilization. It also summarizes the experience gathered by a gas turbine manufacturer in the combustion of BTX, C9+ and LCO type fuels. It also outlines the chemical mechanisms that underlie the clean combustion of aromatic fuels in gas turbine chambers.
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Cignoli, F., S. Benecchi, S. De luliis, and G. Zizak. "Laser Induced Fluorescence of Aromatic Hydrocarbons in diesel oil laminar premixed flames." In Laser Applications to Chemical and Environmental Analysis. Washington, D.C.: Optica Publishing Group, 1998. http://dx.doi.org/10.1364/lacea.1998.lmc.7.

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Because of the planned limitations on pollutants it is becoming more and more stringent to reduce IC engines emissions. In particular, for diesel oil engines, the reduction of soot emission is mandatory. It is well known that aromatic compounds play an important role in the mechanisms of soot production. It is possible that the different classes of aromatics naturally present in the Diesel fuel lead to the formation of different amounts of soot. For this work a set of seven fuels with calibrated composition of different blend of mono-, di- and tri-aromatics but with total aromatic content of about 27% was made available by ELF (Solaize, France). Soot and aromatic hydrocarbons profiles have been detected on the axis of rich premixed flames in order to find possible correlations.
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Nilsson, Nils G. "Experience From Burning Highly Aromatic Fuels in GT35, 17 MW, Gas Turbine." In ASME 1997 Turbo Asia Conference. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-aa-016.

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The aromatic hydrocarbon content in a gas turbine fuel has a great influence during combustion. The aromatic hydrocarbon content governs the hydrogen content and has an indirect effect on fuel burning characteristics like the luminometer No and the smoke point. ABB Stal got an oportunity to sell a standard GT35 gasturbine set for electrical generation to a refinery in Thailand, provided the customers prefered fuel, a naphtha containing up to 75 vol% aromatics, could be used. A theoretical “state of the art” study indicated that 75 vol% aromatics certainly was in the unexperienced area. Most gas turbine fuel specifications set an upper limit for the aromatic content at 30–35% for industrial GT and at 20–25% for aero engines. Higher values could result in smoke formation during combustion. This paper describes a full scale test with the ABB GT35 standard industrial gas generator operating on a liquid fuel containing up to 75% aromatic hydrocarbon content. The measurements of CO, UHC, NOx and the smoke number, in Bacharach, taken from the exhaust during the test, will be presented as well as the influence of the combustion on the combustor wall temperature. The effect of the unique standard design on the GT35 air and fuel mixing of the primary combustor section (patented 1965) will be discussed to show how a very complete combustion was obtained also with a 75% aromatic content in the fuel. After the test that showed that GT35 was able to burn 75% aromatics whitout smoke formation - the set was sold and delivered.
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Dara, Satyadileep, Ibrahim Khan, Eisa Al Jenaibi, Subhendu Sengupta, Vincent Goveas, Nawal Al Yahyaee, Salisu Ibrahim, Anoop Jagannath, and Abhijeet Raj. "Deployment of a Novel Soft Sensor in the Real Time Optimizer Architecture to Enhance the Integrity and Energy Efficiency of Sulfur Recovery Units." In ADIPEC. SPE, 2022. http://dx.doi.org/10.2118/211303-ms.

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Abstract Commercial analyzers for measuring the aromatics in the Claus furnace exit gas are currently not available and this leads to sub-optimal energy efficiency and poses asset integrity concerns. To address this problem a high-fidelity model is developed to function as a real time analyzer. Objective of this work is to incorporate the soft sensor in the architecture of Real Time Optimizer (RTO) to monitor the presence of aromatics in the Claus furnace exit stream. The soft sensor is incorporated in the RTO server which provides the access to the plant operating data and the DCS (Distributed Control System). Soft sensor function in the RTO involves the following steps: Soft sensor accesses the plant data and collects the needful input data for simulation Simulation software available in the RTO executes the softs sensor model simulation and generates the aromatics composition data Aromatics composition data is written to the DCS interface as a soft measurement Operators monitor the aromatic composition and accordingly adjust the fuel gas firing Aromatic soft sensor is developed as a kinetic model, which is function of rate parameters of several key reactions of the Claus furnace. The kinetic model of the Claus furnace is incorporated in a process simulation model and catalytic convertors are simulated too. Model is validated with large plant data to show that model predicts furnace temperature within +/- 5% error and aromatics composition within +/- 5 ppm. Simulation analysis shows that the furnace temperature can be decreased by at least 5 °C while ensuring no BTEX slip. Such change in furnace temperature leads to a reduction in fuel gas flow by ~200 Nm3/h, which translates to a monetary benefit of 0.5 million $/yr. Deployment of the soft sensor is currently in progress through engagement with RTO licensor. To the best knowledge of authors, currently, there is no simulator in the market which can adequately model aromatics oxidation phenomena and predict the aromatic content in the furnace exit. This soft sensor being deployed is novel and first of its kind and expected to achieve a sustainable energy efficiency.
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"Assessment of Formula-Based Structural Annotation of Humic Substances by Mild Chemical Derivatization and Mass Spectrometry." In Sixth International Conference on Humic Innovative Technologies "Humic Substances and Eco-Adaptive Technologies ”(HIT – 2021). Non-Commercial Partnership "Center for Biogenic Resources "Humus Sapiens" (NP CBR "Humus Sapiens"), 2021. http://dx.doi.org/10.36291/hit.2021.mikhnevich.002.

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Natural organic matter (NOM) plays an important role in the environment and its chemical properties and molecular composition reflect balance between mineralization and sequestration of organic carbon. Ultrahigh resolution mass spectrometry (e.g., FTICR MS) provides essential molecular information about NOM. However, NOM molecular heterogeneity prevents application of tandem MS experiments and direct structural information is ultimately missing leaving opportunities to only ambiguous formula-based annotation. The main aim of this work was to develop a chemical workflow to reliably examine the accuracy of several FTICR MS-derived structural indices with the focus on aromaticity and O-functional groups, which greatly impact compound properties. Four NOM samples of different origin (coal, oxidized lignin, river, and permafrost thaw) were brominated by NBS in acetonitrile for 24 hrs at RT. Carboxylic groups in all samples were determined by selective deuteromethylation using CD 3OD/SOCl2 reaction and by HATU amidation with 15N labeled glycine. Carbonyl groups were reduced by NaBD4. All parent and labeled mixtures were analyzed by ESI FTCR MS. Custom python scripts were developed to treat spectra and enumerate specific structural moieties in individual components. Obtained data was used to assess reliability of exact aromaticity indices (AI)1 and aromaticity equivalents (Xc) 2. Lignin- and coal-derived samples turned out to be the most sensitive to bromination which corroborated with the model phenolic structures. On contrary, permafrost thaw, which is enriched with labile species, was mostly resistant to bromination - 22% of molecular ions were brominated. Moreover, unlike oxidized riverine sample, coal NOM included polybrominated species, which implies that reaction efficiency depends on reactivity (i.e. substituents) of aromatic fragments. Samples were characterized by drastically different bromine distributions on van Krevelen diagrams, which correlated with the distribution of non-carboxylic oxygen atoms. Further, we compared AI and Xc aromaticity indices in terms of the proportion of correctly assigned aromatics. The data on brominated molecules were in good agreement with the AI values; however, apparently AI tends to overestimate the number of non-aromatics in the sample since it describe averaged aromaticity rather than the factual presence of aromatic ring. On the other hand, Xc perfectly recognized non-aromatics. In general, a higher proportion of correctly attributed aromatics was observed for the aromaticity equivalent Xc (up to 68%), which tends to find aromatic moieties in non-aromatic molecules assigned by AI. Still, we observed a number of aromatic- and condensed aromatic-assigned compounds, which were resistant to bromination or included lesser Br-atoms than the evaluated number of aromatic rings. Reaction with NaBD4 and enumeration of labeling series revealed the presence of carbonyl groups in these species, which in case of multiple reducing could be reliably assigned to quinone – condensed non-aromatic compounds. The approach may be of great importance in biogeochemical and medicinal studies of NOM. Acknowledgements. This work was supported by the Russian Science Foundation gran No 21-47-04405. References 1. Zherebker, A., Lechtenfeld, O. J., Sarycheva, A., Kostyukevich, Y., Kharybin, O., Fedoros, E. I. and Nikolaev, E. N. Anal. Chem., 2020, 92 (13), 9032-9038; 2. Yassine, M.M., Harir, M., Dabek-Zlotorzynska, E. and Schmitt-Kopplin, P. Rapid Commun. Mass Spectrom., 2014, 28, 2445-2454.
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Cangussu, Arthur Henrique Magela, and Leonardo Baptista. "Estudo teórico da nitração de anéis aromáticos em fase gasosa." In VIII Simpósio de Estrutura Eletrônica e Dinâmica Molecular. Universidade de Brasília, 2002. http://dx.doi.org/10.21826/viiiseedmol202013.

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Nitro-aromatics compounds are more toxic and cancerous than their aromatics parents. Unfortunately, these compounds were identified in Diesel engines emissions and in particulate matter collected in urban areas. By these reasons, the present project aims to investigate the gas phase mechanism of the aromatic nitration following two proposals found in the literature. The proposed mechanisms have been studied by methods based on density functional theory: M06-2X, B3LYP and B2PLYP. Further, the electronic energy of all molecules that take part in the mechanism has been corrected by CCSD(T) method. All study was performed with cc-pVTZ basis set. The results showed that reactions between phenil radical and NO2 proceeds without a barrier forming a vibrational and rotational excited nitrobenzene. The evaluated Arrhenius parameters indicates that the formation of benzene nitrite is faster than the formation of nitrobenzene, while the reaction path initialized by OH addition to the aromatic ring, it is only important at high temperatures. The partial results indicate the formation of nitrophenol during the combustion, in agreement with experimental evidences.
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Leparoux, Julien, Renaud Lecourt, and Olivier Penanhoat. "Effect of Aromatics in Jet Fuels on Spray Characteristics Downstream of an Aeronautical Pressure Swirl Atomizer." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56565.

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Standard aeronautic fuels have a lower limit of aromatics of 8% (by volume) with about 18% for regular Jet A1. It has been shown that aromatics contained in Jet fuel have an impact on the fine particle emissions. In order to reduce these emissions, alternative fuels with lower aromatic content have been identified as a promising solution. Change Jet fuel composition can have several effects on spray and combustion behaviors, among others: atomization process, droplet evaporation, flame structure, pollutant and particle emissions. Then, it is necessary to evaluate the impact of this change on gas turbine performance and operability. The present study is focused on the spray behavior investigation with different aromatic content. Four Jet fuels are investigated including conventional Jet A1 kerosene, drop-in fuel with a mixture of half conventional Jet fuel and synthetic paraffinic kerosene (SPK), SPK with 8% of aromatics and pure SPK. The tests are performed at atmospheric conditions on the MERCATO testbed located at ONERA (FR). Phase Doppler Anemometry (PDA) measurements are carried out for the four fuels on an injection system composed of a pressure swirl atomizer and an air swirler. In this paper, a spray analysis of liquid velocity and droplet diameter measurements is described and linked to the variations of fuel properties. In the range of parameters covered by the four different fuels, it is shown that the spray behavior of each fuel is similar to the conventional Jet A1.
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Berry, David A., Dushyant Shekhawat, Todd H. Gardner, Maria Salazar, Daniel J. Haynes, and James J. Spivey. "Support Effects for Pt and Rh-Based Catalysts for Partial Oxidation of n-Tetradecane." In ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2006. http://dx.doi.org/10.1115/fuelcell2006-97265.

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Catalytic partial oxidation (CPOX) of liquid fuels is an attractive option for producing a hydrogen-rich gas stream for fuel cell applications. However, the high sulfur content along with aromatic compounds present in liquid fuels may deactivate reforming catalysts. Deactivation of these catalysts by carbon deposition and sulfur poisoning is a key technical challenge. The relationship between catalyst supports and deactivation have been studied here for three catalysts (Rh/Ce0.5Zr0.5O2, Pt/Ce0.5Zr0.5O2, and Pt/Al2O3) in a fixed bed catalytic reactor using a mixture of n-tetradecane, 1-methylnaphthalene, and dibenzothiophene to simulate logistic fuels. Carbon production during CPOX reforming was directly related to olefin formation. Olefins, which are known coke precursors, were observed on the Pt catalysts during CPOX of n-tetradecane with no sulfur (particularly from Pt/Al2O3), but not on Rh/Ce0.5Zr0.5O2. For the Rh/Ce0.5Zr0.5O2, yields of H2 and CO dropped to a stationary level after the introduction of sulfur-containing feed (1000 ppm sulfur) or aromatic-containing feed (5 wt%), however, the catalyst activity was restored after removing the sulfur or aromatics from the feed. For the Pt catalysts, H2 and CO yields dropped continuously over time in the presence of sulfur or aromatics in feed. The superior performance of Rh/Ce0.5Zr0.5O2 can be attributed to the higher oxygen-ion conductivity of the Ce0.5Zr0.5O2 support as well as the activity of the Rh sites.
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Bowden, T. T., and J. H. Pearson. "The Effect of Fuel Composition Upon Combustion Performance in a Rolls Royce Tyne Combustor." In ASME 1985 International Gas Turbine Conference and Exhibit. American Society of Mechanical Engineers, 1985. http://dx.doi.org/10.1115/85-gt-39.

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The combustion performance of a wide range of fuel types has been examined utilizing a single combustor from a Rolls-Royce Tyne gas-turbine engine. The results provide further evidence to suggest that fuel total hydrogen content provides a better indication of fuel combustion perfomance than does aromatic content. However, an even better prediction of fuel combustion performance is given by smoke point, although the acknowledged imprecision of the smoke point test does militate against its use as a primary specification requirement. Analysis of certain fuels by 13C NMR and low resolution mass spectroscopy demonstrates that it is those fuels with high concentrations of polycyclic aromatics whose combustion performance in terms of flame radiation and exhaust emissions, is underpredicted by fuel total hydrogen content. There are indications that low concentrations of high molecular weight polycyclic aromatics may substantially impair combustion performance.
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Matveev, S. S., D. V. Idrisov, and A. S. Semenikhin. "LAMINAR BURNING VELOCITY OF INDIVIDUAL HYDROCARBONS AND KEROSENE SURROGATES." In 9TH INTERNATIONAL SYMPOSIUM ON NONEQUILIBRIUM PROCESSES, PLASMA, COMBUSTION, AND ATMOSPHERIC PHENOMENA. TORUS PRESS, 2020. http://dx.doi.org/10.30826/nepcap9a-25.

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Surrogate fuel blends are often used in laboratory experiments and in combustion modeling to reproduce important characteristics of real transportation fuels. Fuel surrogates usually consist of a few class-representative hydrocarbons such as normal and branched alkanes, aromatics, and cycloalkanes. The complexity of a particular blend depends on the number of combustion properties (targets) taken into account. Most often, binary [1] and ternary blends were suggested as kerosene surrogates; yet, in some cases, a single species, n-decane [2], was used to make comparison with kerosene combustion characteristics such as burning velocity and, for example, to determine the emission of polycyclic aromatic hydrocarbons, complex 4-6 component surrogates.
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Reports on the topic "Aromatico"

1

Krigbaum, William R. Mesogenic Rodlike Aromatic Polyesters. Fort Belvoir, VA: Defense Technical Information Center, December 1987. http://dx.doi.org/10.21236/ada189614.

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Glassman, I., and K. Brezinsky. Aromatic-radical oxidation chemistry. Office of Scientific and Technical Information (OSTI), January 1993. http://dx.doi.org/10.2172/6579384.

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Cesar, J. R., and O. H. Ardakani. Organic geochemistry of the Montney Formation: new insights about the source of hydrocarbons, their accumulation history and post accumulation processes. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329788.

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This study consists of a non-traditional molecular and stable isotope approach to analyze organic matter (soluble bitumen and produced oil/condensate) from the Montney Formation low-permeability reservoirs, with the purpose of identifying source(s) of hydrocarbons, accumulation history and post accumulation processes. The same approach bases on the distribution of compound classes such as aromatic carotenoids, polycyclic aromatic hydrocarbons (PAHs), bicyclic alkanes, and oxygen-polar compounds. The geochemical screening has been enhanced with performing compound specific isotope analysis (CSIA) of n-alkanes and selected aromatic hydrocarbons. Widely spread PAHs, the presence of molecular indicators of euxinia, and hydrocarbon mixtures identified using CSIA profiles, are some of the key findings from this research, which will improve our understanding of the Montney petroleum system(s).
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Lee, S. W. Supercritical fluid chromatographic analysis of aromatic ring type component of diesel fuels for an engine testing program to assess impact of fuel aromatics on diesel emissions. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/304569.

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Lam, H., S. M. Marcuccio, P. I. Svirskaya, S. Greenberg, A. B. Lever, and C. C. Leznoff. Binuclear Phthalocyanines with Aromatic Bridges. Fort Belvoir, VA: Defense Technical Information Center, March 1989. http://dx.doi.org/10.21236/ada205868.

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Sander, Lane C., Lane C. Sander, and Stephen A. Wise. Polycyclic aromatic hydrocarbon structure index. Gaithersburg, MD: National Institute of Standards and Technology, 1997. http://dx.doi.org/10.6028/nist.sp.922.

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Sander, Lane C., and Stephen A. Wise. Polycyclic aromatic hydrocarbon structure index. Gaithersburg, MD: National Institute of Standards and Technology, August 2020. http://dx.doi.org/10.6028/nist.sp.922e2020.

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Scott, L. T. High temperature chemistry of aromatic hydrocarbons. Office of Scientific and Technical Information (OSTI), December 1991. http://dx.doi.org/10.2172/10110066.

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Glassman, I., and K. Brezinsky. Aromatic-radical oxidation chemistry. Progress report. Office of Scientific and Technical Information (OSTI), May 1993. http://dx.doi.org/10.2172/10149531.

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Pavlopoulos, Theodore G., and Joseph H. Boyer. Quasi-Aromatic Heterocyclics as Laser Dyes. Fort Belvoir, VA: Defense Technical Information Center, April 1989. http://dx.doi.org/10.21236/ada207134.

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