Relevant bibliographies by topics / Volatile Carbonyl Compounds

Academic literature on the topic 'Volatile Carbonyl Compounds'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Volatile Carbonyl Compounds.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Volatile Carbonyl Compounds"

1

Liu, Xingyun, Wei Xing, Zhaoyang Xu, Xiaomin Zhang, Hui Zhou, Kezhou Cai, Baocai Xu, and Conggui Chen. "Assessing Impacts of Additives on Particulate Matter and Volatile Organic Compounds Produced from the Grilling of Meat." Foods 11, no. 6 (March 14, 2022): 833. http://dx.doi.org/10.3390/foods11060833.

Full text
Abstract:
Cooking fumes are an important source of volatile organic compounds (VOCs), particulate matter (PM), and carbonyl compounds. The additive is wildly applied in grilling meat for flavor improvement. However, the effects of additives on cooking fumes emissions, such as volatile organic compounds (VOCs), particulate matter (PM), and carbonyl compounds, in meat grilling have not been studied. The impact of four additives, including white pepper, salt, garlic powder, and compound marinade, on the emission characteristics of cooking fumes from the grilling meat was investigated. The concentrations of VOCs and carbonyl compounds in the cooking fumes were analyzed by TD-GC/MS and HPLC, respectively. The PM emission characteristics (mass concentration and size distribution) were measured by DustTrak DRX aerosol monitor in real-time. Results showed that the application of white pepper, salt, garlic powder, and mixed spices could significantly reduce the total particles mass concentration (TPM) emissions during meat-grilling by 65.07%, 47.86%, 32.87%, and 56.01%, respectively. The mass concentration of PM during meat-grilling reached maximum values ranging from 350 to 390 s and gradually fell at the final stages of grilling. The total concentration of 22 representative VOCs emitted from the grilling was significantly increased in grilling meat marinated with compound additives. Aromatic hydrocarbons were the predominant VOCs species, followed by ketone compounds. During the grilling process, formaldehyde, acetaldehyde, propionaldehyde, and acetone were major carbonyl compounds. The low molecular weight carbonyl compounds (C1–C3) in cooking fumes were dominant carbonyl compounds.
APA, Harvard, Vancouver, ISO, and other styles
2

Vázquez-Pateiro, Iván, Uxía Arias-González, José Manuel Mirás-Avalos, and Elena Falqué. "Evolution of the Aroma of Treixadura Wines during Bottle Aging." Foods 9, no. 10 (October 8, 2020): 1419. http://dx.doi.org/10.3390/foods9101419.

Full text
Abstract:
Aroma is a crucial attribute for wine quality, particularly in white wines. Traditionally, the consumption of young white wines is recommended over the year following grape harvest due to potential aroma losses that would worsen wine quality. This study aimed to investigate the evolution of volatile compounds, odor activity value-based aroma notes, and sensory perception in Treixadura (Vitis vinifera L.) dry white wines during a 24-month bottle-aging period. Volatile composition was determined by gas chromatography, and wine sensory evaluation was performed by experts. Wine samples had similar volatile compositions at the time of bottling. The volatile contents of the wines were respectively 322.9, 302.7, 323.0, and 280.9 mg L−1 after 6, 12, 18, and 24 months of bottle storage. Most of the volatiles tended to maintain constant concentrations, or with slight increases in all families of volatiles except for acetates and carbonyl compounds, until two years after harvest (18 months of bottle storage) and, then, concentrations reduced sharply. After 24 months of storage in the bottle, the concentrations of terpenes, C6 compounds, higher alcohols, ethyl esters, fatty acids, acetates, carbonyl compounds, and volatile phenols were reduced by 32%, 47%, 11%, 39%, 50%, 74%, 41%, and 54%, respectively. The 18-month bottle-aged wines showed the highest concentrations of volatiles, as well as the best performance in the sensory evaluation, suggesting that a good balance of the aroma attributes was achieved on this date. In conclusion, the current study suggests that Treixadura wines expressed their maximum aroma potential two years after grape harvest.
APA, Harvard, Vancouver, ISO, and other styles
3

Shi, Wen Zheng, Qing Yun Chen, Xi Chang Wang, and Jin Qing Wan. "Research on Predominant Volatile Compounds of Grass Carp Meat." Advanced Materials Research 781-784 (September 2013): 1852–55. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.1852.

Full text
Abstract:
In this paper, the dorsal meat of grass carp was used as research object. The volatile compounds of grass carp were extracted and concentrated by headspace solid phase micro-extraction (HS-SPME). Then the volatiles were identified by gas chromatography-mass spectrometry (GC-MS). The results showed that SPME-GC-MS was effective to analysis of the volatiles in grass carp meat. According to GC-MS, 42 volatile compounds were detected in dorsal meat of grass carp. The volatile components are mostly carbonyl compounds and alcohols, and the relative contents are 95.74%. The method of odor activity value was applied to determine predominant volatile components of grass carp. There are 12 predominant components were determined in dorsal meat of grass carp, including: 1-Octen-3-ol, 2,6-Nonadienal, Nonanal, (E,E)-2,4-Decadienal, (E,Z)-2,4-Decadienal, Hexanal, 2-Nonenal, Octanal, 2-Decenal, Heptanal, Heptanol and 2-Octenal etc. The study will enrich the theoretical knowledge of flavor chemistry .
APA, Harvard, Vancouver, ISO, and other styles
4

Shi, Wen Zheng, Xi Chang Wang, Miao Miao Ying, Yao Zhou Zhu, Ning Ping Tao, and Yuan Liu. "Effect of Seasons on Volatile Compounds of Dorsal Meat in Grass Carp." Advanced Materials Research 236-238 (May 2011): 2739–43. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.2739.

Full text
Abstract:
In this paper, the volatile compounds of the dorsal meat of cultured grass carp in different seasons were identified by SPME(solid phase micro-extraction)-GC (gas chromatography)-MS (mass spectrometry). The results showed that SPME was effective to analysis of the volatiles in grass carp. According to GC-MS, 21, 43, 42 and 42 volatile compounds were detected in dorsal meat of grass carp in spring, summer, autumn and winter respectively. The volatile components are mostly carbonyl compounds and alcohols, the respective relative contents are above 90%. The relative content of the volatile compounds of cultured grass carp in different seasons has the significance difference by ANOVA. Seasons have greater effect on the volatile compounds of dorsal meat of grass carp. The study will enrich the theoretical knowledge of flavor chemistry and provide an effective solution to the current situation of low proportion of fish processing.
APA, Harvard, Vancouver, ISO, and other styles
5

Shi, Wen Zheng, Miao Miao Ying, and Xi Chang Wang. "Effect of Seasons on Volatile Compounds in Grass Carp Meat." Advanced Materials Research 554-556 (July 2012): 1565–71. http://dx.doi.org/10.4028/www.scientific.net/amr.554-556.1565.

Full text
Abstract:
In this paper, the volatile compounds of the belly meat and red meat of cultured grass carp in different seasons were identified by SPME(solid phase micro-extraction)-GC (gas chromatography)-MS (mass spectrometry). The results showed that SPME was effective to analysis of the volatiles in grass carp meat. According to GC-MS, 26, 44, 41 and 26 volatile compounds were detected in belly meat of grass carp in spring, summer, autumn and winter respectively; 48, 46, 43 and 53 volatile compounds were detected in red meat of grass carp in spring, summer, autumn and winter respectively. The volatile components are mostly carbonyl compounds and alcohols, the respective relative contents are above 90%. The relative content of the volatile compounds of cultured grass carp in different seasons has the significance difference by ANOVA. Seasons have great effect on the volatile compounds of grass carp meat and the impact on red meat is smaller than belly meat The study will enrich the theoretical knowledge of flavor chemistry and provide an effective solution to the current situation of low proportion of fish processing.
APA, Harvard, Vancouver, ISO, and other styles
6

Wang, Kai, Bowen Ma, Tao Feng, Da Chen, Linyun Yao, Jun Lu, and Min Sun. "Quantitative analysis of volatile compounds of four Chinese traditional liquors by SPME-GC-MS and determination of total phenolic contents and antioxidant activities." Open Chemistry 19, no. 1 (January 1, 2021): 518–29. http://dx.doi.org/10.1515/chem-2021-0039.

Full text
Abstract:
Abstract The aim of this work was to investigate the volatile compositions of four Chinese functional liquors. For this purpose, volatile compounds of four liquors were extracted with head-space solid-phase microextraction (HS-SPME) and analyzed with gas chromatography-mass spectrometry (GC-MS) along with the determination of odor activity value (OAV) and relative odor contribution (ROC). Sixty volatiles were tentatively identified and categorized into the following seven groups: alcohols, esters, fatty acids, carbonyl compound, hydrocarbons, phenols, and other components. The differences in chemical composition of volatile compounds were visualized with heat maps. Odorants were compared with different samples using a statistical analysis of Venn diagrams and a multivariate principal component analysis, and ethyl hexanoate, ethyl acetate, and ethyl octanoate were found to be the key odorants. Besides, abundant phenolic contents and high antioxidant ability of four Chinese functional liquors could potentially bring better health-boosting effects.
APA, Harvard, Vancouver, ISO, and other styles
7

Lin, Y., S. R. Dueker, A. D. Jones, S. E. Ebeler, and A. J. Clifford. "Protocol for collection and HPLC analysis of volatile carbonyl compounds in breath." Clinical Chemistry 41, no. 7 (July 1, 1995): 1028–32. http://dx.doi.org/10.1093/clinchem/41.7.1028.

Full text
Abstract:
Abstract This noninvasive method for collection and analysis of a wide range of aldehydes and ketones in human breath may enable assessment of lipid peroxidation and metabolic status in vivo. Breath samples are drawn through silica cartridges impregnated with 2,4-dinitrophenylhydrazine, which traps carbonyls as their hydrazone derivatives. The hydrazone derivatives are eluted from the cartridges with acetonitrile, separated by reversed-phase HPLC, and quantified spectrophotometrically. Using this method, we have measured formaldehyde, acetaldehyde, acetone, propanal, 2-butanone, butanal, pentanal, and hexanal. Recoveries of carbonyls added to Douglas bags were > 90%, except for 2-butanone, which was 86.2%. The overall CVs for sampling plus analyzing duplicate aliquots of breath were < 11%. The results indicate that this protocol can be used to monitor changes of carbonyl production by analyzing expired air, which may, with further study, indicate physiological and pathological status.
APA, Harvard, Vancouver, ISO, and other styles
8

Hellén, H., H. Hakola, A. Reissell, and T. M. Ruuskanen. "Carbonyl compounds in boreal coniferous forest air in Hyytiälä, Southern Finland." Atmospheric Chemistry and Physics Discussions 4, no. 3 (June 3, 2004): 2991–3011. http://dx.doi.org/10.5194/acpd-4-2991-2004.

Full text
Abstract:
Abstract. A variety of C1-C12 carbonyl compounds were measured in the air of a boreal coniferous forest located in Hyytiälä, Southern Finland. 24-h samples were collected during March and April in 2003 using DNPH (2,4-dinitrophenyl hydrazine) coated C18-cartridges and analyzed by liquid chromatography-mass spectrometry (LC-MS). Altogether 22 carbonyl compounds were quantified. The most abundant carbonyls were acetone (24-h average 1340 ng/m3), formaldehyde (480 ng/m3) and acetaldehyde (360 ng/m3). In contrast, scaling of concentrations against reactivity with the hydroxyl (OH) radical significantly increased the contribution of larger aldehydes and ketones (e.g. decanal, octanal and 6-methyl-5-hepten-2-one). Concentrations of monoterpene reaction products nopinone (9 ng/m3) and limona ketone (5 ng/m3) were low compared to the most abundant low molecular weight carbonyls. The total concentration of carbonyl compounds in Hyytiälä in April/March 2003 was much higher than the concentration of aromatic hydrocarbons and monoterpenes in April 2002. Lifetimes of the measured carbonyls with respect to reactions with OH radicals, ozone (O3), and nitrate (NO3) radicals as well as photolysis were estimated. The main sinks for most of the carbonyl compounds in Hyytiälä in springtime are expected to be reactions with the OH radical and photolysis. For 6-methyl-5-hepten-2-one and limona ketone also reactions with ozone are important. The sources of carbonyl compounds are presently highly uncertain. Due to the relatively short lifetimes of aldehydes and ketones, secondary biogenic and anthropogenic sources, that is oxidation of volatile organic compounds, and primary biogenic sources are expected to dominate in Hyytiälä.
APA, Harvard, Vancouver, ISO, and other styles
9

Sidorenko, G. V. "Volatile technetium carbonyl compounds: Vaporization and thermal decomposition." Radiochemistry 52, no. 6 (December 2010): 638–52. http://dx.doi.org/10.1134/s1066362210060159.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Li, Mingxiao, Souvik Biswas, Michael H. Nantz, Richard M. Higashi, and Xiao-An Fu. "Preconcentration and Analysis of Trace Volatile Carbonyl Compounds." Analytical Chemistry 84, no. 3 (January 20, 2012): 1288–93. http://dx.doi.org/10.1021/ac2021757.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Volatile Carbonyl Compounds"

1

Cosseron, Anne-Flore. "Evaluation et traitement des polluants émis par un moteur thermique fonctionnant avec des biocarburants." Phd thesis, Université de Haute Alsace - Mulhouse, 2012. http://tel.archives-ouvertes.fr/tel-00860233.

Full text
Abstract:
Les biocarburants présentent une alternative prometteuse à l'utilisation de carburants fossiles. Cependant, l'augmentation de la quantité de biocarburants introduite dans les carburants nécessite de connaître leur impact sur les émissions de polluants. Le travail réalisé lors de cette thèse peut être décrit en deux parties : La première traite de l'évaluation des émissions de polluants réglementés et non réglementés émis par la combustion de biocarburants dans un moteur diesel. Différents biocarburants ont été testés : des esters méthyliques d'huile de soja et de colza, des esters éthyliques d'huile usagée et un carburant de référence exempt de tout biocarburant. Les résultats montrent que la nature des biocarburants ainsi que leur teneur ont un impact sur les polluants émis. Par exemple, une diminution de la taille des particules émises a été observée avec l'utilisation des esters méthyliques d'huile de soja. Le deuxième objectif de cette thèse concerne le piégeage des polluants Diesel, notamment des composés organiques volatils par des zéolithes. Plusieurs zéolithes ont été synthétisées puis caractérisées. Des tests d'adsorption par thermogravimétrie ont ensuite été réalisés au laboratoire avec différentes molécules sondes représentatives des polluants émis par les moteurs Diesel (le n-hexane, le p-xylène et l'acétone). Certaines zéolithes comme les zéolithes faujasite présentent des capacités d'adsorption intéressantes. Toutefois, la plupart des résultats montrent une diminution de la capacité d'adsorption avec l'augmentation de la température. Ces zéolithes ont ensuite été placées en sortie d'échappement d'un moteur diesel afin d'étudier leur capacité d'adsorption.
APA, Harvard, Vancouver, ISO, and other styles
2

Jiang, Zhaohui. "Atmospheric measurements of a series of volatiles organic compounds." Thesis, Orléans, 2014. http://www.theses.fr/2014ORLE2014.

Full text
Abstract:
Les composes carbonyles et BTEX (benzène, toluène, éthylbenzène et xylène) sont deux groupes importants de composés organiques volatils (COV) présents dans l'atmosphère. Ils ont une contribution significative à la formation d'oxydants tels que l'ozone, PAN et d'autres photo-oxydants dans la troposphère. En outre, ils ont des effets néfastes sur la santé humaine. Dans ce travail, les concentrations atmosphériques de carbonyles et d’hydrocarbures aromatiques ont été mesurées et quantifiées en utilisant des techniques HPLC et GC-MS sur un site de mesure semi-urbain à Orléans (ICARE, France), de juin 2010 à août 2011. D’autres mesures ont été conduites à Pékin (CAS-RCEES, Chine) du 6 au 28 Juin 2013 en utilisant les mêmes techniques expérimentales. Les résultats obtenus dans ces deux sites sont présentés, comparés et discutés
Carbonyls and BTEX (benzene, toluene, ethyl-benzene and xylene) are two important groups of Volatile Organic Compounds (VOCs) present in the atmosphere. They have a significant contribution to the formation of oxidants such as ozone, PAN and other photooxidants in the troposphere. In addition, they have adverse effects on human health. In this work, atmospheric concentrations of carbonyls and aromatic hydrocarbons were measured and quantified using GC-MS and HPLC techniques at a semi-urban site in Orleans (ICARE, France), from June 2010 to August 2011. Urban ambient air sampling was also performed in 6-28th June 2013 in Beijing (RCEES-CAS, China). It has been conducted in order to compare the measured concentrations of the investigated species in two different sites using the same analytical techniques. All results are presented and discussed
APA, Harvard, Vancouver, ISO, and other styles
3

Petroni, Ivan Alexandre. "Poluição do ar por compostos orgânicos voláteis (COV) em ambiente interno hospitalar." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/46/46133/tde-05102009-100831/.

Full text
Abstract:
A quantificação de 11 compostos carbonílicos (formaldeído, acetaldeído, acetona, acroleína, propionaldeído, crotonaldeído, butiraldeído, benzaldeído, isovaleraldeído, valeraldeído e 2,5-dimetilbenzaldeído) e a identificação de outros 43 compostos orgânicos voláteis (alcanos, alcenos, aromáticos, halogenados e nitrogenados) foram feitas em 9 ambientes diferentes de trabalho localizados em áreas internas do Hospital Universitário, USP, São Paulo. Dentre os compostos carbonílicos, os mais abundantes em ordem decrescente foram formaldeído, acetona, acetaldeído e acroleína. As maiores razões de mistura de formaldeído foram observadas nas salas de Macroscopia (169,9 e 90,2 ppbv) e Técnicas Histológicas (11,7 e 58,7 ppbv), em decorrência da atividade desenvolvida nos locais. Na sala de Macroscopia, os níveis de formaldeído encontrados foram acima do limite (100 ppbv) estabelecido por órgãos internacionais que controlam a qualidade do ar em ambientes internos não industriais. As razões de mistura entre o ambiente interno e o ambiente externo, razões I/E, permitiram indicar a predominância dos compostos carbonílicos nos ambientes internos. A acroleína foi encontrada na faixa de 6,4 a 9,3 ppbv nos ambientes internos estudados. Na área externa, entretanto, foram encontrados valores similares (6,4 e 6,8 ppbv) aos dos ambientes internos obtendo razões I/E próximas de 1. Os compostos podem ter sido emitidos por materiais de construção e acabamento, fumaça do tabaco, adesivos, via metabolismo microbiano e bacteriano ou podem ter sido transportados por correntes de ar do ambiente externo para o ambiente interno
The quantification of 11 carbonyl compounds (formaldehyde, acetaldehyde, acrolein, acetone, propionaldehyde, crotonaldehyde, butiraldehyde, benzaldehyde, isovaleraldehyde, valeraldehyde and 2,5-dimethylbenzaldehyde) and the identification of another 43 volatile organic compounds (alkanes, alkenes, aromatic, halogenated and nitrogenated compounds) have been done with samples of 9 different indoor places inside the University Hospital at USP in São Paulo. Among the carbonyl compounds, there where found higher quantities of formaldehyde, acetone, acetaldehyde and acrolein in this order. The highest ratios of formaldehyde mixture have been observed at the Macroscopic room (169.88 and 90.2 ppbv) and Histological Techniques (11.7 and 58.7 ppbv), due to the routine activities of these places. At the Macroscopy room, the level of formaldehyde identified (100 ppbv) was above the international limits established to non-industrial internal places. The ratios of the mixture of indoor and outdoor places, I/O, indicate the biggest presence of carbonyl compounds in internal places. Acrolein has been identified (6.4 to 9.3 ppbv) at indoor places. At the external area, there where found similar values (6,4 to 6,8 ppbv), and the ratio I/O obtained is near to 1. The origin of these compounds is possibly construction materials, smoke of cigarettes, adhesives, metabolism of microorganisms or they may have come from the outdoor to the indoor
APA, Harvard, Vancouver, ISO, and other styles
4

Conte, Ludivine. "Emissions océaniques de gaz d’intérêt pour la chimie atmosphérique - Modélisation des dynamiques océaniques du CO, de l’isoprène et du DMS." Electronic Thesis or Diss., université Paris-Saclay, 2020. http://www.theses.fr/2020UPASV007.

Full text
Abstract:
L’activité phytoplanctonique est à l’origine de la production dans l’océan de composés volatils, qui, une fois émis dans l’atmosphère, ont un impact sur sa capacité oxydante, la formation d’aérosols et la régulation du climat. Les émissions océaniques de la plupart de ces composés sont néanmoins mal connues en raison d’un faible nombre d’observations in situ et d’un manque de connaissance dans les processus océaniques en jeu. Dans un premier temps, je me suis intéressée aux cycles océaniques du monoxyde de carbone (CO) et de l’isoprène (C5H8). Afin de ré-évaluer leurs émissions vers l’atmosphère, les processus de production et de consommation de ces gaz dans la colonne d’eau ont été intégrés au modèle 3-D de circulation océanique et de biogéochimie marine NEMO-PISCES. En parallèle, des compilations de concentrations océaniques mesurées in situ et de résultats de laboratoire ont été réalisées à partir de la littérature afin de mieux contraindre ces processus océaniques. J'ai obtenu les premières spatialisations des émissions de CO et isoprène basées sur un modèle 3-D de l'océan et ne faisant pas appel à des données satellites pour le calcul des concentrations. Pour le CO, les émissions globales sont estimées à 4,0 Tg C an-1, avec une dynamique spatiale qui reflète principalement sa source photochimique. Cette dynamique est très différente de celle produite dans les années 80, qui était la seule disponible pour la communauté de chimistes de l’atmosphère. Pour l’isoprène, j'ai montré l’importance de la température de l’eau dans la régulation de sa production phytoplanctonique. Les émissions globales sont estimées à 0,66 Tg C an-1, avec une dynamique spatiale qui reflète cette source. Pour les deux composés, j’ai également montré l’importance des effets de la circulation et du mélange océaniques dans la détermination des concentrations de surface et donc des émissions vers l’atmosphère. Dans un second temps, je me suis intéressée aux réponses des émissions océaniques de CO, isoprène et sulfure de diméthyle (DMS) au changement climatique. Celui-ci conduit à une augmentation des émissions des 3 gaz (+9,4, +4,2 et +6,5% pour le CO, l’isoprène et le DMS en 2100 pour un scénario à fortes émissions de gaz à effet de serre). Les émissions ont tendance à augmenter aux hautes latitudes et à diminuer aux basses latitudes. Les changements globaux sont principalement contrôlés par les changements de température de l'eau, alors que les changements dans la distribution spatiale sont contrôlés par une redistribution de la production phytoplanctonique. Même si les incertitudes sur la modélisation de ces cycles est encore importante, ce travail devrait permettre à terme d’intégrer ces cycles dans un modèle du système terre, couplant biogéochimie marine et chimie atmosphérique, afin de mieux quantifier le rôle potentiel de ces interactions sur l’évolution de la chimie atmosphérique et du climat
Phytoplankton activity is responsible for the oceanic production of volatile compounds which, once released into the atmosphere, have an impact on its oxidative capacity, on aerosol formation and on climate evolution. The oceanic emissions of most of these compounds are, however, poorly known because of a low number of in situ observations and a lack of knowledge in the oceanic processes involved. In a first step, I studied the oceanic cycles of carbon monoxide (CO) and isoprene (C5H8). In order to re-evaluate their emissions to the atmosphere, the sources and sinks of these gases in the water column have been embedded into the 3-D ocean circulation and marine biogeochemistry model NEMO-PISCES. In parallel, I compiled in situ measured oceanic concentrations and laboratory results from the literature to better constrain these oceanic processes. I produced the first spatialization of CO and isoprene emissions based on a 3-D ocean model and not relying on satellite data for the calculation of concentrations. For CO, global emissions are estimated to 4.0 Tg C yr-1, with a spatial dynamic reflecting its photochemical source. This dynamic is very different from the one produced in the 80s, which was the only one available to the atmospheric chemistry community. For isoprene, I showed the importance of water temperature in regulating the phytoplankton production. Global emissions are estimated to 0.66 Tg C yr-1, with a spatial dynamic reflecting this source. For both compounds, I also showed the importance of ocean circulation and mixing in determining surface concentrations and therefore emissions to the atmosphere. In a second step, I studied the responses of oceanic emissions of CO, isoprene and dimethyl sulfide (DMS) to climate change. This leads to an increase in the emissions of the 3 gases (+9.4, +4.2 and +6.5% for CO, isoprene and DMS in 2100 for a scenario with high emissions of greenhouse gases). Emissions tend to increase at high latitudes and decrease at lower latitudes. Global changes are mainly controlled by changes in water temperature, while changes in spatial distribution are controlled by a redistribution of phytoplankton production. Even if the uncertainties in modeling these cycles are still important, this work should allow integrating these cycles into an Earth System model coupling marine biogeochemistry and atmospheric chemistry, in order to better quantify the potential role of these interactions on the evolution of atmospheric chemistry and climate
APA, Harvard, Vancouver, ISO, and other styles
5

Zhang, Yujie. "Atmospheric measurements and degradation mechanisms of a number of volatile organic compounds." Thesis, Orléans, 2012. http://www.theses.fr/2012ORLE2048.

Full text
Abstract:
Les composés organiques carbonylés et les BTEX (Benzène, Toluène, Éthylbenzène et Xylènes) représentent une classe importante de composés organiques volatils dans l’atmosphère. Ils sont émis par des sources anthropogénique et biogéniques. Leur dégradation atmosphérique conduit à la formation d’ozone, de phooxidants et d’aérosols organiques affectant ainsi la qualité de l’air aux échelles locales et régionales ainsi que la santé humaine. Il est donc important de mesurer leurs concentrations et évaluer leur devenir atmosphérique. Dans la présente thèse, nous avons conduit une étude systématique qui a permis de mesurer les concentrations de ces composés et identifier leurs sources à Pékin (Juillet 2008-Août 2010) et évaluer l’importance des caractéristiques météo. Nous avons aussi mené des études sur la dégradation atmosphérique de trois formates (isoproyle, isobutyle et n-propyle) en utilisant la chambre de simulation atmosphérique d’ICARE (CNRS, Orléans)
Carbonyls and BTEX (Benzene, Toluene, Ethylbenzene, and Xylenes) represent an important class of VOCs (volatile organic compounds) in the atmosphere. They are emitted into the atmosphere through anthropogenic and biogenic sources. Their atmospheric degradation leads to the formation of ozone, photooxidants and organic aerosols affecting the air quality at the local and regional scales and human health. It is, hence, of importance to measure their atmospheric concentrations and investigate their fate. In the present thesis, we have conducted a systematic measurement study of carbonyls and BTEX in Beijing during the period of Jul 2008-Aug 2010 in order to evaluate their ambient levels, possible sources and the influence of characteristic weather conditions. In a separate work, we performed a series of experimental studies on the OH-initiated oxidation of isopropyl formate, isobutyl formate, and n-propyl isobutyrate using the ICARE-CNRS (Orleans) simulation chamber from which we derived the product yields. The data obtained are presented and discussed
APA, Harvard, Vancouver, ISO, and other styles
6

Velasco, Saldaña Hector Erik. "Urban flux and concentration measurements of volatile organic compounds and CO₂ in Mexico City." Online access for everyone, 2005. http://www.dissertations.wsu.edu/Dissertations/Fall2005/h%5Fvelasco%5F121305.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Szabó, Emese. "Atmospheric kinetics and photochemistry of oxygenated volatile organic compounds." Thesis, Lille 1, 2011. http://www.theses.fr/2011LIL10099/document.

Full text
Abstract:
Les composés organiques volatils oxygénés (COVOs) sont des espèces chimiques importantes de l’atmosphère. Ils incluent, par exemple, les alcools aliphatiques, les aldéhydes, les cétones et les acides organiques. Dans la troposphère libre, l’abondance des COVOs est plus importante que celle des hydrocarbures non méthaniques et leur réactivité globale avec OH est comparable avec celle du méthane. En revanche le méthane est présent à une concentration plus élevée. La dégradation des COVOs dans l’atmosphère s’effectue soit par la réaction avec le radical OH, soit par photolyse. La dégradation des COVOs produit des radicaux libres qui vont influencer la capacité oxydante de l’atmosphère, les concentrations en oxydes d’azotes, en radical OH et en ozone troposphérique. L’ozone est le troisième plus important gaz à effet de serre dans l’atmosphère et est l’un des composants toxiques principaux des pollutions urbaines et intervient donc dans des problèmes environnementaux graves comme le réchauffement climatique et la dégradation de la qualité de l’air. L’objectif de ce travail est de contribuer à la compréhension du comportement atmosphérique de quelques COVOs en mesurant leurs paramètres cinétiques et photochimiques apportant des donnés afin de permettre la réalisation de modélisations informatiques et l’amélioration de la connaissance des mécanismes chimiques ayant lieu dans l’atmosphère
Oxygenated volatile organic compounds (OVOCs) are important constituents of the atmosphere. They include, e.g., aliphatic alcohols, aldehydes, ketones, and organic acids. In the free troposphere, the abundance of OVOCs is higher than that of the non-methane hydrocarbons and their overall reactivity with OH is comparable with that of methane, in contrast that methane is present in much higher concentration. Degradation of OVOCs in the atmosphere takes place via the reaction with OH radicals and, in the case of photochemically active molecules, via photolysis. Free radicals are formed in the photooxidative degradations of the oxygen containing organics which basically determine the oxidative capacity of the atmosphere, the transformation of nitrogen oxides and the concentration of OH radicals and tropospheric ozone. Ozone is the third most important greenhouse gas in the atmosphere, it is one of the toxic components of urban smog and so it is related to such grave environmental problems as global warming and the quality of air. The aim of this work is to contribute to the understanding of the atmospheric behaviour of a few OVOCs by measuring their kinetic and photochemical parameters. One of the major goals of a laboratory basic research in atmospheric chemistry is to provide kinetic and photochemical data for computer modelling and to deduce atmospheric transformation mechanisms in the case of some important chemicals
APA, Harvard, Vancouver, ISO, and other styles
8

Ying, Fang. "Au/CeO₂ based catalysts for catalytic oxidation of volatile organic compounds and carbon monoxide." HKBU Institutional Repository, 2010. http://repository.hkbu.edu.hk/etd_ra/1185.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Miguet, Marianne. "Adsorption de COV issus d'eaux souterraines et régénération des charbons actifs par voie solaire." Thesis, Perpignan, 2015. http://www.theses.fr/2015PERP0029/document.

Full text
Abstract:
Ce manuscrit s’intéresse à une filière globale et durable de dépollution des eaux souterraines. Le polluant cible, le tétrachloroéthylène, est un composé organique volatil. La première étape de cette filière est la séparation du contaminant de l’eau. Elle a été réalisée par adsorption sur charbons actifs dans une colonne en lit fixe. Les résultats obtenus en laboratoire sur les capacités et les cinétiques d’adsorption ont permis de montrer l’efficacité de ce procédé. Un modèle issu de ces expériences a représenté correctement des conditions opératoires variées correspondant à celles utilisées dans l’industrie. Ce modèle a été validé par un pilote préindustriel installé sur site et fonctionnant en conditions réelles. La gestion des charbons actifs chargés en polluant a été étudiée. La régénération thermique a été privilégiée. Cette opération présente l’intérêt de rétablir les capacités d’adsorption des carbones activés et de récupérer les polluants en phase liquide. Bien que préférable à la production d’adsorbants, elle pourrait encore être plus durable et compétitive économiquement en effectuant le traitement thermique par voie solaire. Il a été montré que le taux de régénération est le même pour les régénérations solaire et classique. Il est donc possible, dans le cas du tétrachloroéthylène, de remplacer une source d’énergie fossile par le soleil. La solution de distillat obtenue lors de la régénération peut être minéralisée par photocatalyse hétérogène. Cette opération a été réalisée en laboratoire avec une lampe reproduisant le spectre solaire. La faisabilité de la photocatalyse solaire sur le résidu issu de cette filière de dépollution a ainsi été montrée
This manuscript focuses on a comprehensive and durable treatment of polluted groundwater. The target contaminant, tetrachlorethylene, is a volatile organic compound. The first step in the treatment is the separation of contaminants. It was carried out by adsorption on activated carbons in a fixed bed column. The results obtained in the laboratory on the adsorption capacity and kinetics have shown the efficiency of this process. A mathematic model represented properly the various operating conditions corresponding to those used in the industry. This model has been validated by a pre-industrial pilot installed onsite and operating in real conditions. Management of spent activated carbons was studied. The thermal regeneration was chosen because it has the interest to restore the adsorption capacity of adsorbents and to collect the pollutants in a liquid phase. Although preferable to the production of activated carbons, it could still be economically more competitive and more sustainable by performing the heat treatment by solar means. It has been shown that the regeneration rate is the same for the solar and classical regenerations. It is therefore possible, in the case of tetrachlorethylene, to replace a fossil energy source by the sun.The distillate solution obtained during the regeneration can be mineralized by heterogeneous photocatalysis. This operation was carried out in the laboratory with a lamp reproducing the solar spectrum. The feasibility of solar photocatalysis on the final residue of the water treatment has been shown
APA, Harvard, Vancouver, ISO, and other styles
10

Dib, Hadi. "Traitement catalytique des émissions issues de la combustion de la biomasse." Thesis, Littoral, 2019. https://documents.univ-littoral.fr/access/content/group/50b76a52-4e4b-4ade-a198-f84bc4e1bc3c/BULCO/Th%C3%A8ses/Toxicologie/These_DIB_Hadi.pdf.

Full text
Abstract:
La combustion de la biomasse et en particulier du bois constitue une alternative intéressante à l'utilisation des combustibles fossiles pour l'approvisionnement en énergie. Elle présente l'avantage de pouvoir être renouvelable sans contribuer à une émission supplémentaire de CO₂. Cependant, il est connu que les appareils de chauffage utilisant la biomasse comme combustible peuvent générer certains polluants gazeux dont notamment les Composés Organiques Volatils (COV) et le monoxyde de carbone (CO). Le post-traitement catalytique se révèle comme une des technologies les plus prometteuses pour limiter ces émissions de polluants. Ce projet vise donc à développer des matériaux catalytiques actifs, sélectifs en dioxyde de carbone et stables, assurant une décomposition complète du mélange de COV et de CO. Les catalyseurs à base de métaux nobles, étant reconnus pour leur bonne activité pour ce type de réaction d'oxydation, engendrent cependant un coût important pour le développement d'un tel procédé. L'objectif de nos travaux sera donc basé sur la synthèse et le développement de nouveaux matériaux catalytiques peu onéreux à base d'oxydes de métaux de transition qui seront utilisés comme alternatifs aux catalyseurs à base de métaux nobles. Afin d'obtenir des oxydes performants, la synthèse des matériaux en utilisant la voie hydrotalcite a été choisie. Nous avons montré l'effet bénéfique de l'ajout du cérium dans les oxydes MgAl-O et CuAl-O vis-à-vis de l'oxydation du toluène et/ou du CO. Une relation entre la réductibilité et l'activité de ces solides pour ces réactions a été observée. Pour les catalyseurs MgAlCe-O, aucun effet sur la conversion du toluène n'a été observé, cependant un effet significatif sur la conversion du CO en présence de toluène a été mis en évidence. Ainsi, un oxyde du type CuAlCe-O s'est avéré actif et stable pour la destruction de mélanges de COV et de CO. De plus, l'intérêt d'utiliser la voie hydrotalcite pour synthétiser ces oxydes CuAlCe-O a été vérifié par comparaison avec d'autres voies de synthèses. L'activité supérieure du catalyseur CuAlCe-O peut être corrélée à un effet de synergie entre les éléments cuivre et cérium
Biomass burning, in particular wood, is an attractive alternative to the utilization of fossil fuels for energy supply, as it is renewable and does contribute to any additional CO₂ emission into atmospher. However, it is known that heating appliances using biomass generate large amounts of Volatile Organic Compounds (VOCs) and carbon monoxide (CO) during the combustion cycle. A catalytic post-treatment is one of the most promising technologies to limit the emissions of these pollutants. This project aims to develop active and selective catalytic materials with enhanced redox properties in order to achieve the total oxidation of VOCs and CO at low temperature. Noble metals based catalysts are considered as good candidates for such types of reactions. However, these catalysts are very expensive for adaptation to domestic heating device. The objective of our work is focused on the synthesis and development of innovative and cheaper catalytic materials composed of transition metal oxides that could be used as alternatives to noble metal catalysts. In order to obtain efficient oxides, the hydrotelcite route was chosen for the synthesis of the catalysts. The beneficial effect of adding cerium to MgAl-O and CuAl-O oxides towards the oxidation of toluene and/or CO was demonstrated. A relationship between the reducibility and activity of these solids for these reactions has been also identified. For MgAlCe-O catalysts, a beneficial effect on the conversion of toluene in presence of CO was observed. Indeed, the temperature of toluene oxidation was shifted at lower temperatures in presence of CO. In contrary, no effect on toluene conversion was observed for the CuAlCe-O materials. However, a significant effect on the conversion of CO in presence of toluene was revealed. Briefly, a CuAlCe-O type oxide with high activity and stability has been synthesized for the destruction of VOCs and CO mixtures. In addition, the advantage of using the hydrotalcite route to synthesize these CuAlCe-O oxides has been verified by comparison with other synthetic routes. The high activity of the CuAlCe-O catalyst can be attributed to the synergic effect between copper and cerium elements
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Volatile Carbonyl Compounds"

1

Control, Massachusetts Division of Air Quality. Massachusetts 1990 base year emission inventories: Volatile organic compounds, nitrogen oxides, carbon monoxide. Boston, Mass: Massachusetts Dept. of Environmental Protection, Bureau of Waste Prevention, Division of Air Quality Control, 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Smith, Neil A. Metabolism of dimethyl disulphide, carbon disulphide and other volatile sulphur compounds by chemolithoautotrophic sulphur bacteria. [s.l.]: typescript, 1988.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Choosing an adsorption system for VOC: Carbon, zeolite, or polymers? Research Triangle Park, N.C: The Center, 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

J, Giddings T., and European Commission, eds. Reduction of volatile organic compound emissions from industrial coating of metallic surfaces using carbon based materials. Luxembourg: Office for Official Publications of the European Communities, 1994.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Stefanoff, James G. Prediction of volatile organic compound fate during remediation of contaminated groundwater utilizing the powdered activated carbon treatment process. 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Louisiana. Dept. of Environmental Quality. Technical Services., ed. Summary of the 1990 base year ozone emission inventory for volatile organic compounds, oxides of nitrogen, and carbon monoxide emissions for Baton Rouge and Calcasieu, Louisiana nonattainment areas, September, 1994. Baton Rouge, La: The Services, 1994.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Literature review and research scoping study on the treatment of volatile organic carbon compounds in the off-gas from contaminated groundwater and soil remedial technologies. Burlington, ON: Burlington Environmental Technology Office, Canada Centre for Inland Waters, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Volatile Carbonyl Compounds"

1

Ciccioli, Paolo, and Michela Mannozzi. "High-Molecular-Weight Carbonyls and Carboxylic Acids." In Volatile Organic Compounds in the Atmosphere, 292–341. Oxford, UK: Blackwell Publishing Ltd, 2007. http://dx.doi.org/10.1002/9780470988657.ch8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Kumar, Bhupinder, Vaneet Kumar, Saruchi, and Ashvinder Kumar Rana. "Volatile Organic Compounds Detection Using Carbon Nano Composites." In Environmental Remediation Through Carbon Based Nano Composites, 123–34. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-6699-8_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Severo, Ihana Aguiar, Pricila Nass Pinheiro, Karem Rodrigues Vieira, Leila Queiroz Zepka, and Eduardo Jacob-Lopes. "Biological Conversion of Carbon Dioxide into Volatile Organic Compounds." In Conversion of Carbon Dioxide into Hydrocarbons Vol. 2 Technology, 45–73. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-28638-5_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Coelho, J. A. P., R. L. Mendes, M. C. Provost, J. M. S. Cabral, J. M. Novais, and A. M. F. Palavra. "Supercritical Carbon Dioxide Extraction of Volatile Compounds from Rosemary." In ACS Symposium Series, 101–9. Washington, DC: American Chemical Society, 1997. http://dx.doi.org/10.1021/bk-1997-0670.ch008.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Balanay, Jo Anne G. "Application of Activated Carbon Fibers in Respiratory Protection for Volatile Organic Compounds." In Handbook of Respiratory Protection, 293–332. Boca Raton : Taylor & Francis, CRC Press, 2018.: CRC Press, 2017. http://dx.doi.org/10.1201/9781351109079-15.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Tomcej, Ray A. "Prediction of Acid Gas Dew Points in the Presence of Water and Volatile Organic Compounds." In Carbon Dioxide Sequestration and Related Technologies, 1–12. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118175552.ch1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Mocho, Pierre, and Pierre Cloirec. "Regeneration by Induction Heating of Granular Activated Carbon Loaded with Volatile Organic Compounds." In Environmental Technologies and Trends, 124–40. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-59235-5_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Salomón, Roberto L., Jesús Rodríguez-Calcerrada, and Michael Staudt. "Carbon Losses from Respiration and Emission of Volatile Organic Compounds—The Overlooked Side of Tree Carbon Budgets." In Tree Physiology, 327–59. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-69099-5_10.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Rudolph, J. "Stable Carbon Isotope Ratio Measurements: A New Tool to Understand Atmospheric Processing of Volatile Organic Compounds." In Global Atmospheric Change and its Impact on Regional Air Quality, 37–42. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0082-6_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Calvert, Jack, Abdelwahid Mellouki, John Orlando, Michael Pilling, and Timothy Wallington. "Rate Coefficients and Mechanisms for the Atmospheric Oxidation of the Ketones." In Mechanisms of Atmospheric Oxidation of the Oxygenates. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199767076.003.0008.

Full text
Abstract:
Ketones are emitted directly to the atmosphere, and their sources were discussed in detail in chapter I. In the U.K. acetone and butanone comprise about 7% and 5%, respectively, of the total anthropogenic emissions of oxygenated compounds, and 1.6% and 1.1%, respectively, of the total anthropogenic emissions of nonmethane volatile organic compounds. Ketone emissions from solvents (both industrial and personal) are substantial; emissions from both gasoline- and diesel-fueled vehicles also contribute. Ketones are also formed extensively in the atmosphere in the oxidation of other compounds. Acetone, for example is formed in the OH-initiated oxidation of propane, iso-butane, iso-pentane, and neopentane and from a number of higher hydrocarbons. It is also formed in the oxidation of terpenes. The distribution, sources, and sinks of acetone in the atmosphere have been analyzed by Simpson et al. (1994). Methyl vinyl ketone is an important first generation product in the OH-initiated oxidation of isoprene. In this chapter, we discuss the rate coefficients and the mechanisms of oxidation of ketones. The classes covered include alkanones, hydroxyketones, diketones, unsaturated ketones, ketenes, cyclic ketones, ketones derived from biogenic compounds, and halogen-substituted ketones. Photolysis is a major atmospheric process for many ketones, and will be discussed in chapter IX. The major bimolecular reactions removing ketones from the atmosphere are with OH. Although less important than the OH reactions, reactions with Cl have been studied quite extensively. Other than for unsaturated ketones, reactions with NO3 and O3 are unimportant in tropospheric chemistry and have been studied little. The carbonyl group deactivates the α-position with respect to reaction with OH, but activates the β-position, and possibly more distant sites as well. The net result is that the overall rate coefficient of an alkanone generally exceeds that of the equivalent alkane. The temperature dependences of the rate coefficients can be quite complex, with acetone and possibly butanone showing a minimum in the rate coefficient at ∼250 K, while the higher alkanones show negative temperature dependences across the more limited temperature ranges that have been investigated. The most likely explanation of this behavior is the formation of a pre-reaction, hydrogen-bonded complex.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Volatile Carbonyl Compounds"

1

Yuan, Wenhui, Qiuyan Chen, and Jianyu Guan. "REMOVAL OF VOLATILE ORGANIC COMPOUNDS BY ACTIVATED CARBON." In Proceedings of the Third Asia-Pacific Conference. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812791924_0051.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Han, Muyue, Jing Zhao, and Lin Li. "Emissions of Volatile Organic Compounds From 4D Printing and Associated Control Strategies Towards Workplace Safety." In ASME 2021 16th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/msec2021-63540.

Full text
Abstract:
Abstract The integration of additive manufacturing technologies with stimuli-responsive shape memory materials allows the dynamic self-adaptation of fabricated parts upon exposure to external stimulations. The additional dimension of time inspires the concept of four-dimensional printing technology. However, the emerging feedstock materials and the employment of external stimuli in 4D printing are also associated with new workplace hazards and occupational health concerns. Current evaluation studies on additive manufacturing are mainly focused on the safety and health effects that originated from the part production phase and cannot be directly applied in 4D printing processes. In this study, the emissions of volatile organic compounds from stereolithography-based 4D printing process with thermo-responsive materials are targeted as the potential safety concern. Real-time total volatile organic compound monitoring is conducted during various production phases to align the emission sources with critical operating activities, including both operator interventions and machine operations. Comparative experiments are performed to evaluate the effectiveness of proposed emission control strategies. In particular, alterations in operation procedures such as stirring speed in material mixing and post-printing stimulation method can contribute positively to air emission control during manual operations. In addition, the installation of activated carbon fiber filters inside the machine build chamber can lead to a significant reduction of air emissions during part fabrication with an overall total volatile organic compound concentration reduction of 58.91%.
APA, Harvard, Vancouver, ISO, and other styles
3

Hafaiedh, I., W. El Euch, P. Clement, A. Abdelghani, and E. Llobet. "Functionalized carbon nanotubes for the discrimination of volatile organic compounds." In 2013 Transducers & Eurosensors XXVII: The 17th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS & EUROSENSORS XXVII). IEEE, 2013. http://dx.doi.org/10.1109/transducers.2013.6626963.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Chen, Weibin, Ariel Nunez Garcia, Elodie Passeport, Denis O’CARROLL, and Barbara Sherwood Lollar. "Compound Specific Stable Carbon Isotope Analysis Evaluation of Remediation of Chlorinated Volatile Organic Compounds at a Sulfidated Nanozerovalent Injection Field Site." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.397.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Yin, Jun, Geoffroy Lesage, Etienne Paul, Mathieu Sperandio, Fangming Jin, Qi Zhou, and Bing Wu. "Volatile Aromatic Compounds Removal in SBR: Study of Molecule Transfer and Conversion by Volatilisation and Degradation." In 2nd International Symposium on Aqua Science, Water Resource and Low Carbon Energy. AIP, 2010. http://dx.doi.org/10.1063/1.3529347.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

"POLYISOPRENE – NANOSTRUCTURED CARBON COMPOSITE (PNCC) MATERIAL FOR VOLATILE ORGANIC COMPOUND DETECTION." In International Conference on Biomedical Electronics and Devices. SciTePress - Science and and Technology Publications, 2009. http://dx.doi.org/10.5220/0001557301170122.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Ku, Yi-Hang, and Che-Hsin Lin. "Novel porous polyimide film doped with carbon black for volatile organic compounds detection." In 2011 IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS). IEEE, 2011. http://dx.doi.org/10.1109/nems.2011.6017563.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Shimizu, Tsuyoshi, and Hiroshi Tani. "Behavior of Chemical Reaction Between Siloxane Compounds and Surface on Carbon Materials." In ASME 2017 Conference on Information Storage and Processing Systems collocated with the ASME 2017 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/isps2017-5424.

Full text
Abstract:
Among many organic vapor contaminations released from structural components of hard disk drives, organic sioloxanes are particularly ominous, as they can be released in a relatively large quantity. Adherence of organic pollutants to the disk surface is a factor that hinders the normal operation of the head and the disk surface. It is known that volatile siloxane oligomers such as D4 (octamethyl cycletetrasiloxane) often form cyclic polydimethylsiloxane polymers in the presence of acidic catalysts. We investigated the reaction between D4 and some carbon materials such as diamond-like carbon in hard disk and graphite. The effect of the protection of carbon materials by Perfluoropolyether (PFPE) lubricants was observed.
APA, Harvard, Vancouver, ISO, and other styles
9

Wang, Jian, Bo Feng, and Wengang Wu. "Conductive-carbon-black filled PDMS chemiresistor sensor for the detection of volatile organic compounds." In 2011 IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS). IEEE, 2011. http://dx.doi.org/10.1109/nems.2011.6017389.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Lahoti, Raj. "Methane and other Volatile HC Gasses in Produced-Water." In SPE Eastern Regional Meeting. SPE, 2021. http://dx.doi.org/10.2118/201799-ms.

Full text
Abstract:
Abstract Getting correct estimates for Volatile Organic Compounds (VOCs) and greenhouse gases (GHGs) from water storage tanks is not only important for maintaining emission compliance for state and national regulatory authorities, but also crucial in designing the capital-intensive systems for economic use of methane and other Natural Gas Liquid (NGL) gasses. This paper highlights the significance of gas liberated from produced water tanks in the fields. The paper presents a laboratory method to estimate such emissions from produced-water storage tanks by virtue of the in-situ water getting depressurized and releasing VOCs, and other emission gasses such as Hydrogen Sulfide (H2S) and Carbon Dioxide (CO2). Further, the paper provides qualitative and quantitative assessment of the gas liberated from produced-water by analyzing the gas liberated from produced-water from gas-condensate reservoir wells from the Marcellus region.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Volatile Carbonyl Compounds"

1

Hoffman, F. Retardation of volatile organic compounds in ground water in low organic carbon sediments. Office of Scientific and Technical Information (OSTI), April 1995. http://dx.doi.org/10.2172/39598.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Sullivan, Patrick D., Mark J. Rood, and K. J. Hay. Volatile Organic Compound Recovery Using Activated-Carbon Fiber-Cloth with Rapid Electrothermal Desorption. Fort Belvoir, VA: Defense Technical Information Center, January 1999. http://dx.doi.org/10.21236/ada380281.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Dudareva, Natalia, Alexander Vainstein, Eran Pichersky, and David Weiss. Integrating biochemical and genomic approaches to elucidate C6-C2 volatile production: improvement of floral scent and fruit aroma. United States Department of Agriculture, September 2007. http://dx.doi.org/10.32747/2007.7696514.bard.

Full text
Abstract:
The specific objectives of approved proposal include to: 1. Elucidate the C6-C2 biochemical pathways leading to the biosynthesis of phenylacetaldehyde, phenylethyl alcohol and phenylethyl acetate in floral tissues of ornamentally important plants, pefunia and roses. 2. Isolate and characterrze genes responsible for the production of these C6-C2 compounds and those involved in the regulation of the pathway using genomic and transcriptomic tools. 3. Determine whether altering the expression of key genes of this pathway can result in changing the aroma characteristics of flowers. Aldehydes are intermediates in a variety of biochemical pathways including those involved in the metabolism of carbohydrates, vitamins, steroids, amino acids, benzylisoquinoline alkaloids, hormones, and lipids. In plants they are also synthesized in response to environmental stresses such as salinity, cold, and heat shock or as flavors and aromas in fruits and flowers. Phenylacetaldehyde along with 2-phenylethanol and its acetate ester, are important scent compounds in numerous flowers, including petunias and roses. However, little is known about the biosynthesis of these volatile compounds in plants. We have shown that the formation PHA and 2-phenylethanol from Phe does not occur via trans-cinnamic acid and instead competes with the key enzyme of phenypropanoid metabolism Pheammonia-lyase (PAL) for Phe utilization. Using functional genomic approach and comparative gene expression profiling, we have isolated and characterized a novel enzyme from petunia and rose flowers that catalyzes the formation of the Ca-Czcompound phenylacetaldehyde (PHA) from L-phenylalanine (Phe) by the removal of both the carboxyl and amino groups. This enzyme, designated as phenylacetaldehyde synthases (PAAS), is a bifunctional enzyme that catalyzes the unprecedented efficient coupling of phenylalanine decarboxylation to oxidation, generating phenylacetaldehyde, CO2, ammonia, and hydrogen peroxide in stoichiometric amounts. Down-regulation of PAAS expression via RNA interference-based (RNAi) technology in petunia resulted in no PHA emission when compared with controls. These plants also produced no 2-phenylethanol, supporting our conclusion that PHA is a precursor of 2-phenylethanol. To understand the regulation of scent formation in plants we have also generated transgenic petunia and tobacco plants expressing the rose alcohol acetyltransferase (RhAAT) gene under the control of a CaMV-35S promoter. Although the preferred substrate of RhAAT in vitro is geraniol, in transgenic petunia flowers, it used phenylethyl alcohol and benzyl alcohol to produce the corresponding acetate esters, not generated by control flowers. These results strongly point to the dependence of volatile production on substrate availability. Analysis of the diurnal regulation of scent production in rose flowers revealed that although the daily emission of most scent compounds is synchronized, various independently evolved mechanisms control the production, accumulation and release of different volatiles. This research resulted in a fundamental discovery of biochemical pathway, enzymes and genes involved in biosynthesis of C6-C2s compounds, and provided the knowledge for future engineering plants for improved scent quality.
APA, Harvard, Vancouver, ISO, and other styles
4

Last, G. V., and V. J. Rohay. Carbon tetrachloride contamination, 200 West Area, Hanford Site: Arid Site Integrated Demonstration for remediation of volatile organic compounds. Office of Scientific and Technical Information (OSTI), May 1991. http://dx.doi.org/10.2172/5882995.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Last, G. V., and V. J. Rohay. Carbon tetrachloride contamination, 200 West Area, Hanford Site: Arid Site Integrated Demonstration for remediation of volatile organic compounds. Office of Scientific and Technical Information (OSTI), May 1991. http://dx.doi.org/10.2172/10120982.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Last, G. V., and V. J. Rohay. Refined conceptual model for the Volatile Organic Compounds-Arid Integrated Demonstration and 200 West Area Carbon Tetrachloride Expedited Response Action. Office of Scientific and Technical Information (OSTI), March 1993. http://dx.doi.org/10.2172/10151709.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Tawfik, Aly, Deify Law, Juris Grasis, Joseph Oldham, and Moe Salem. COVID-19 Public Transportation Air Circulation and Virus Mitigation Study. Mineta Transportation Institute, June 2022. http://dx.doi.org/10.31979/mti.2021.2036.

Full text
Abstract:
COVID-19 may have forever changed our world. Given the limited space and air circulation, potential infections on public transportation could be concerningly high. Accordingly, this study has two objectives: (1) to understand air circulation patterns inside the cabins of buses; and (2) to test the impact of different technologies in mitigating viruses from the air and on surfaces inside bus cabins. For the first objective, different devices, metrics and experiments (including colored smoke; videotaping; anemometers; pressure differentials; particle counts; and 3D numerical simulation models) were utilized and implemented to understand and quantify air circulation inside different buses, with different characteristics, and under different operating conditions (e.g. with windows open and shut). For the second objective, three different live prokaryotic viruses were utilized: Phi6, MS2 and T7. Various technologies (including positive pressure environment inside the cabin, HEPA filters with different MERV ratings, concentrated UV exposure with charged carbon filters in the HVAC systems, center point photocatalytic oxidation technology, ionization, and surface antiviral agents) were tested to evaluate the potential of mitigating COVID-19 infections via air and surfaces in public transportation. The effectiveness of these technologies on the three live viruses was tested in both the lab and in buses in the field. The results of the first objective experiments indicated the efficiency of HVAC system designs, where the speed of air spread was consistently much faster than the speed of air clearing. Hence, indicating the need for additional virus mitigation from the cabin. Results of the second objective experiments indicated that photocatalytic oxidation inserts and UVC lights were the most efficient in mitigating viruses from the air. On the other hand, positive pressure mitigated all viruses from surfaces; however, copper foil tape and fabrics with a high percentage of copper mitigated only the Phi6 virus from surfaces. High-temperature heating was also found to be highly effective in mitigating the different viruses from the vehicle cabin. Finally, limited exploratory experiments to test possible toxic by-products of photocatalytic oxidation and UVC lights inside the bus cabin did not detect any increase in levels of formaldehyde, ozone, or volatile organic compounds. Implementation of these findings in transit buses, in addition to the use of personal protective equipment, could be significantly valuable for protection of passengers and drivers on public transportation modes, possibly against all forms of air-borne viruses.
APA, Harvard, Vancouver, ISO, and other styles
8

Tawfik, Aly, Deify Law, Juris Grasis, Joseph Oldham, and Moe Salem. COVID-19 Public Transportation Air Circulation and Virus Mitigation Study. Mineta Transportation Institute, June 2022. http://dx.doi.org/10.31979/mti.2022.2036.

Full text
Abstract:
COVID-19 may have forever changed our world. Given the limited space and air circulation, potential infections on public transportation could be concerningly high. Accordingly, this study has two objectives: (1) to understand air circulation patterns inside the cabins of buses; and (2) to test the impact of different technologies in mitigating viruses from the air and on surfaces inside bus cabins. For the first objective, different devices, metrics and experiments (including colored smoke; videotaping; anemometers; pressure differentials; particle counts; and 3D numerical simulation models) were utilized and implemented to understand and quantify air circulation inside different buses, with different characteristics, and under different operating conditions (e.g. with windows open and shut). For the second objective, three different live prokaryotic viruses were utilized: Phi6, MS2 and T7. Various technologies (including positive pressure environment inside the cabin, HEPA filters with different MERV ratings, concentrated UV exposure with charged carbon filters in the HVAC systems, center point photocatalytic oxidation technology, ionization, and surface antiviral agents) were tested to evaluate the potential of mitigating COVID-19 infections via air and surfaces in public transportation. The effectiveness of these technologies on the three live viruses was tested in both the lab and in buses in the field. The results of the first objective experiments indicated the efficiency of HVAC system designs, where the speed of air spread was consistently much faster than the speed of air clearing. Hence, indicating the need for additional virus mitigation from the cabin. Results of the second objective experiments indicated that photocatalytic oxidation inserts and UVC lights were the most efficient in mitigating viruses from the air. On the other hand, positive pressure mitigated all viruses from surfaces; however, copper foil tape and fabrics with a high percentage of copper mitigated only the Phi6 virus from surfaces. High-temperature heating was also found to be highly effective in mitigating the different viruses from the vehicle cabin. Finally, limited exploratory experiments to test possible toxic by-products of photocatalytic oxidation and UVC lights inside the bus cabin did not detect any increase in levels of formaldehyde, ozone, or volatile organic compounds. Implementation of these findings in transit buses, in addition to the use of personal protective equipment, could be significantly valuable for protection of passengers and drivers on public transportation modes, possibly against all forms of air-borne viruses.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Volatile Carbonyl Compounds' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography