Veronique Montplaisir, Nathaly Chow Lan, Julie Guimond, Céline Savineau, Pangala V. Bhat, Sylvie Mader,
... phenobarbital-induced aldehyde dehydrogenase (PB-ALDH). Oxidation of propanal was observed with both enzymes. On the other ... phenobarbital-induced aldehyde dehydrogenase (PB-ALDH). Oxidation of propanal was observed with both enzymes. On the other ... concentrations of substrate (all-trans, 9-cis, or propanal) were added in 2.5 μl of dimethyl ... NADH formation required both enzyme and substrate. When propanal was the substrate, enzyme activity was quantified by ... is active, we examined its capacity to oxidize propanal, a property described previously for PB-ALDH (24Lindahl ...
Tópico(s): Retinal Diseases and Treatments
2002 - Elsevier BV | Journal of Biological Chemistry
... unravel the reaction pathways and catalytic requirements for propanal deoxygenation over Brønsted acid sites contained within MFI zeolites. Propanal deoxygenation in the absence of external hydrogen source ... CC bond formation that involve bimolecular coupling of propanal and uni-molecular deoxygenation steps, respectively. The inter- ... and its reactive collision frequencies increase with increasing propanal pressure. The reaction is initiated by keto–enol tautomerization of propanal to form small concentrations of propenol. The propenol ...
Tópico(s): Metal-Organic Frameworks: Synthesis and Applications
2014 - Elsevier BV | Journal of Catalysis
Matthew Neurock, Zhiyuan Tao, Ashwin Chemburkar, David Hibbitts, Enrique Iglesia,
... and the corresponding energetics for the interconversion of propanal + H2 to propanol and the subsequent C-C ... esterification of these mixtures over model Cu surfaces. Propanal and hydrogen readily equilibrate with propanol via C- ... steps to form surface propoxide intermediates and equilibrated propanal/propanol mixtures. Surface propoxides readily form via low ... the electrophilic carbon center of the carbonyl of propanal or via a proton transfer from an adsorbed propanol to a vicinal propanal. The resulting propoxide withdraws electron density from the ...
Tópico(s): Catalysts for Methane Reforming
2016 - Royal Society of Chemistry | Faraday Discussions
Yalei Wang, Chang Qi, Ye Ning, Xianshu Lv, Xiaozhe Yu, Xingqing Yan, Yu Jian,
... critical intermediate species in the combustion of hydrocarbons, propanal, as an isomer of acetone and propylene oxide, ... acid production under elevated temperatures and pressures. Unfortunately, propanal reacts readily with air or oxygen, resulting in ... conditions. To reduce the risk, the concentration of propanal and oxygen needs to be controlled strictly. Therefore, ... LFL) and the limiting oxygen concentration (LOC) of propanal at elevated temperatures and pressures need to be ... analyzed. The results show that the oxidation of propanal proceeds slowly during the air injection at 95 ℃. ...
Tópico(s): Combustion and flame dynamics
2022 - Elsevier BV | Fuel
Zhiping Shen, Jenny Kartika Rusli, Luz Sanguansri, Mary Ann Augustin,
Abstract Propanal concentrations in the static headspace (HS) above water, aqueous protein solutions and freshly made tuna oil-in-water emulsions spiked with propanal (an indicator of omega-3 fatty acid oxidation) were compared. In the presence of proteins, HS propanal concentration was reduced and its decrease above aqueous ... results suggested that there was stronger binding of propanal to HWPI compared to WPI. Emulsification decreased the HS propanal concentration even further for both the WPI and ...
Tópico(s): Microencapsulation and Drying Processes
2006 - Elsevier BV | Food Chemistry
Kota V. Ramana, Bharat L. Dixit, Sanjay Srivastava, Ganesaratnam K. Balendiran, Satish K. Srivastava, Aruni Bhatnagar,
... the reduction of glutathiolated aldehydes. Reduction of glutathionyl propanal [γGlu-Cys(propanal)-Gly] was more efficient than that of Gly-Cys(propanal)-Gly and γ-aminobutyric acid-Cys(propanal)-Gly suggesting a possible interaction between α-carboxyl ... in efficiency due to W20F mutation with glutathionyl propanal was not observed with γ-aminobutyric-Cys(propanal)-Gly or Gly-Cys-(propanal)-Gly, indicating that Trp20 is involved in binding ... S302A mutation was less severe when γGlu-Cys(propanal)-Glu rather than glutathionyl propanal was used as ...
Tópico(s): Sulfur Compounds in Biology
2000 - American Chemical Society | Biochemistry
ABSTRACT Propanal is an aldehyde intermediate formed during the hydrocarbon combustion process. Potentially, the use of oxygenated biofuels reduces ... aldehyde by‐products, mainly formaldehyde, acetaldehyde, acrolein, and propanal. These aldehydes are carcinogenic, and therefore it is ... shock waves for stoichiometric (Φ = 1) mixtures of propanal (CH 3 CH 2 CHO) and oxygen (O ... as well as to the predictions of three propanal combustion kinetic models: Politecnico di Milano (POLIMI), National ... was used for measuring methane (CH 4 ) and propanal time histories behind the reflected shock waves during ...
Tópico(s): Combustion and flame dynamics
2016 - Wiley | International Journal of Chemical Kinetics
Anne Peutzfeldt, Erik Asmussen,
... present study was to determine the effect of propanal and diacetyl addition on the quantity of remaining double bonds of chemically cured dental resins. Propanal (propionaldehyde) or diacetyl (2.3‐butanedione) was added ... mixtures were varied with respect to content of propanal or diacetyl. Addition of propanal or diacetyl to chemically curable resins resulted in ... of statistical significance was found between content of propanal and quantity of remaining double bonds, while the ... double bonds was found not to be linear. Propanal was equally effective in reducing the quantity of ...
Tópico(s): Dental Radiography and Imaging
1996 - Wiley | European Journal Of Oral Sciences
Shahid P. Baba, Joseph David Hoetker, Michael L. Merchant, Jon B. Klein, Jian Cai, Oleg A. Barski, Daniel J. Conklin, Aruni Bhatnagar,
... Our studies show that the reduction of carnosine-propanals is catalyzed by the enzyme aldose reductase (AR). Carnosine-propanals were converted to carnosine-propanols in the lysates ... propanols was decreased in AR-null mice. Carnosine-propanals formed covalent adducts with nucleophilic amino acids leading ... unknown metabolic pathway for the removal of carnosine-propanal conjugates and suggest a new role of AR ... Our studies show that the reduction of carnosine-propanals is catalyzed by the enzyme aldose reductase (AR). ...
Tópico(s): Aldose Reductase and Taurine
2013 - Elsevier BV | Journal of Biological Chemistry
Véronique Dias, Jacques Vandooren, Hervé Jeanmart,
Propanal (C2H5CHO) is a crucial intermediate oxygenated species in hydrocarbons and oxygenated fuels combustion, thus motivating a ... In this study, two premixed at flames of propanal/hydrogen/oxygen/argon, a stoichiometric and a rich, ... for the reactants, products, and intermediate species: C2H5CHO (propanal), H2, O2, Ar, H, OH, HO2, CO, CO2, ... UCL) has been extended to the kinetics of propanal and its reliability has been validated against both of these propanal flames, at low pressure and in the temperature ...
Tópico(s): Atmospheric chemistry and aerosols
2016 - Taylor & Francis | Combustion Science and Technology
R. Alcalá, Jeff Greeley, Manos Mavrikakis, J.A. Dumesic,
... the potential-energy diagram for the hydrogenation of propanal and acetone on Pt(111). Calculations for molecularly adsorbed species indicate that acetone and propanal are both weakly bound to the surface through ... an adsorbed hydrogen atom to adsorbed acetone and propanal, leading to adsorbed isopropoxy and n-propoxy species, ... These results would suggest that the rate of propanal hydrogenation over Pt should be faster compared to ... origin for the experimentally observed slower rate of propanal hydrogenation over Pt appears to be related to ...
Tópico(s): Catalysts for Methane Reforming
2002 - American Institute of Physics | The Journal of Chemical Physics
Yoichiro Kamimura, Satoshi Sato, Ryōji Takahashi, Toshiaki Sodesawa, Tetsu Akashi,
... was discussed in comparison with the reactions of propanal and n-propyl propionate over the CeO2–Fe2O3. ... the CeO2–Fe2O3 catalysts at 450 °C, and propanal, 3-hydroxy-2-methylpentanal, and n-propyl propionate ... for the catalytic dehydrogenation of 1-propanol to propanal without losing the ability for the dimerization of propanal. The turnover frequency (TOF) based on a basic ... reactants of 1-propanol at 450 °C and propanal at 400 °C suggest that propanal is an initial intermediate converting into the final ...
Tópico(s): Catalysts for Methane Reforming
2003 - Elsevier BV | Applied Catalysis A General
Giuseppe P. Lepore, Bhuvan C. Pant, Cooper H. Langford,
... text] for the disappearance of 1-propanol and propanal were estimated based on total light intensity entering ... see text], was extrapolated for pure propanol and propanal in both geometries. The high quantum yields were ... with electron–hole recombination, at high surface coverage. Propanal was identified as the primary intermediate generated from ... propanol in both reactor systems, but yields of propanal were systematically 10 times lower than 1-propanol ... indicating that there was an effective pathway for propanal oxidation on the surface prior to desorption. The ...
Tópico(s): Advanced oxidation water treatment
1993 - NRC Research Press | Canadian Journal of Chemistry
Daolai Sun, Yasuhiro Yamada, Satoshi Sato,
... WO3 catalyst shows the highest catalytic activity for propanal formation than other supported catalysts. A high and stable propanal selectivity of 93.5% was attained in H2 ... of 1,2-PDO and the selectivity to propanal over the silica-supported WO3 were significantly affected ... of 1,2-PDO and the selectivity to propanal. The appropriate calcination temperature for silica-supported WO3 ... of 1,2-PDO and the selectivity to propanal were also affected by the reaction temperature, the ... and the amount of catalyst used. A high propanal selectivity of 89.1% with a complete 1, ...
Tópico(s): Catalysis and Oxidation Reactions
2014 - Elsevier BV | Applied Catalysis A General
A. L. Van Wyngarden, Saúl Pérez-Montaño, J. V. H. Bui, E. S. W. Li, Teratology Nelson ', Kwonchul Ha, L. Leong, Laura T. Iraci,
... this study, experiments combining sulfuric acid (H2SO4) with propanal and with mixtures of propanal with glyoxal and/or methylglyoxal at acidities typical ... chemical composition of the films. Films formed from propanal were a complex mixture of aldol condensation products, acetals and propanal itself. The major aldol condensation products were the ... the aqueous phase. Films formed on mixtures of propanal with glyoxal and/or methylglyoxal also showed evidence ... under atmospheric conditions, similar reactions of aldehydes like propanal with common aerosol organic species like glyoxal and ...
Tópico(s): Air Quality and Health Impacts
2015 - Copernicus Publications | Atmospheric chemistry and physics
AbstractPeutzfeldt A Retention of propanal and diacetyl in experimental resins.The degree of evaporation from experimental resins containing 0–40 mol% propanal or diacetyl was determined over a month period ... 7.51% by weight. At low contents of propanal or diacetyl, M, remained unchanged as compared with ... significantly. In resins based on BisGMA and TEGDMA, propanal was retained to a lesser extent than diacetyl. In resins based on UEDMA and HEMA, propanal was retained to a greater extent than diacetyl. ...
Tópico(s): Chemistry and Chemical Engineering
1997 - Informa | Acta Odontologica Scandinavica
Gianluca Capriolo, В. А. Алексеев, Alexander A. Konnov,
Propanal is a critical stable intermediate derived from the oxidation of 1-propanol, a promising alcohol fuel additive. To deepen the knowledge and accurately describe propanal combustion characteristics, new burning velocity measurements at different ... out and a new detailed kinetic mechanism for propanal was proposed. Experiments were performed using the heat ... that, as expected, the important reactions influencing the propanal oxidation in flames are pertinent to H2 and ... the most recent Konnov model, extended to include propanal chemistry subset. Rate constant parameters were selected based ...
Tópico(s): Heat transfer and supercritical fluids
2018 - Elsevier BV | Combustion and Flame
Yalei Wang, Yu Jian, Xingqing Yan, Chang Qi, Ye Ning, Xianshu Lv, Xiaozhe Yu,
Propanal is a crucial intermediate speciates generated from the combustion of biofuels. To understand its formation pathways ... speed at engine-like conditions is essential. Additionally, propanal can be used to produce propionic acid by ... the explosion pressure and laminar burning speed of propanal/air mixtures were investigated. Results show that the ... the major elementary reactions affecting the combustion of propanal were analyzed. From fuel-lean to stoichiometric concentration, the combustion of propanal is dominated by the reaction kinetics of H2 ...
Tópico(s): Combustion and Detonation Processes
2022 - Elsevier BV | Fuel
Keitaro Mori, Yasuhiro Yamada, Satoshi Sato,
... the dehydration of 1,2-propanediol to produce propanal. In particular, silica-supported silicotungstic acid showed the highest catalytic activity in the formation of propanal. At low conversions, however, propanal reacted with another 1,2-propanediol to produce ... dioxolane). Such acetal formation reduced the selectivity to propanal. Under optimum reaction conditions, 100% conversion was attained with propanal selectivity higher than 93 mol% at 200 °C.
Tópico(s): Polyoxometalates: Synthesis and Applications
2009 - Elsevier BV | Applied Catalysis A General
Christoph Lichtenstern, Stefan Hofer, Andrea G. Möllers, Steffi Snyder-Ramos, Dorothee Spies-Martin, Eike Martin, Jan Schmidt, J. Motsch, Hubert J. Bardenheuer, Markus A. Weigand,
... malondialdehyde (MDA), and the volatile aldehydes hexanal and propanal as LPO-markers. Eighteen patients with ARDS, 16 ... those of controls. Blood concentrations of hexanal and propanal, specific by-products of lipid peroxidation, were elevated ... significantly higher only in LTX. Unexpectedly, hexanal and propanal concentrations were significantly higher in LTX than in ... malondialdehyde (MDA), and the volatile aldehydes hexanal and propanal as LPO-markers. Eighteen patients with ARDS, 16 ... those of controls. Blood concentrations of hexanal and propanal, specific by-products of lipid peroxidation, were elevated ...
Tópico(s): Liver Disease and Transplantation
2009 - Elsevier BV | Journal of Surgical Research
... of conversion of double bonds. For this purpose, propanal was added to monomer mixtures, which were then ... with respect to monomer composition and content of propanal. The quantity of remaining double bonds was determined ... dry storage for one week. The addition of propanal resulted in a decrease in the quantity of ... as 89% as compared with the mixtures without propanal. Negative correlations of statistical significance were found between the content of propanal and quantity of remaining double bonds in BISGMA: ...
Tópico(s): Dental Research and COVID-19
1994 - SAGE Publishing | Journal of Dental Research
Sunyoung Choi, Tae Yeon Kang, Kyo‐Won Choi, Song‐Hee Han, Doo‐Sik Ahn, Sun Jong Baek, Sang Kyu Kim,
Two different conformational isomers of propanal, cis and gauche, are investigated by the vacuum-UV mass-analyzed threshold ionization (VUV-MATI) spectroscopy to give accurate adiabatic ionization ... and 9.9516 ± 0.0006 eV, respectively. cis-Propanal, which is the more stable conformer in the ... less stable in the cation compared to gauche-propanal. Vibrational structures revealed in the MATI spectra indicate ... structural changes upon ionization. The ionization of gauche-propanal induces a geometrical change along the conformational coordinate, ...
Tópico(s): Advanced Chemical Physics Studies
2008 - American Chemical Society | The Journal of Physical Chemistry A
Benjamin Akih-Kumgeh, Jeffrey M. Bergthorson,
... temperature ignition behavior of selected C3 oxygenated hydrocarbons, propanal (propionaldehyde, PAL or CH3CH2CHO), acetone (propanone or AC), ... revealed for the ketone, acetone, and the aldehyde, propanal, with propanal portraying shorter ignition delay times than acetone. In ... carbon–oxygen bonds differ in these three fuels. Propanal and ethyl formate have similar ignition delays that ... existing models. Furthermore, a chemical kinetic mechanism for propanal oxidation is proposed and good agreement between the ...
Tópico(s): Combustion and flame dynamics
2011 - Elsevier BV | Combustion and Flame
Sang‐Hyun Pyo, Martin Hedström, Stefan Lundmark, Nicola Rehnberg, Rajni Hatti‐Kaul,
... catalysts for self- and cross-aldol condensation of propanal in aqueous media was investigated. The reaction pathway ... using strong anion-exchange resin, 97% conversion of propanal was achieved with 95% selectivity to 2-methyl- ... exchanger was lower. During cross-aldol condensation of propanal with formaldehyde, 3-hydroxy-2-methyl-2-hydroxymethylpropanal ... conditions. The strong anion-exchange resin provided maximal propanal conversion of 80.4% to the product with ... weak anion-exchange resin, the optimal conversion of propanal was 89.9% after 24 h at 0. ...
Tópico(s): Multicomponent Synthesis of Heterocycles
2011 - American Chemical Society | Organic Process Research & Development
György Keglevich, Tamás Kégl, Irina L. Odinets, Natalya M. Vinogradova, László Kollár,
... formation of the branched aldehyde regioisomer (3-phenyl-propanal), the introduction of ortho- and para-tolyl substituents ... slightly preferred formation of linear aldehyde (2-phenyl-propanal). At the same time, the introduction of tolyl ... formation of the linear aldehyde regioisomer (3-phenyl-propanal) is favoured by the decrease of the temperature. ... la formation de l'aldéhyde branché (2-phenyl-propanal), l'introduction d'un substituant tolyl en ortho- ... faible proportion, à un aldéhyde linéaire (3-phenyl-propanal). En même temps, l'introduction de groupes tolyl ...
Tópico(s): Asymmetric Hydrogenation and Catalysis
2004 - Elsevier BV | Comptes Rendus Chimie
MyatNoeZin Myint, Yushan Yan, Jingguang G. Chen,
The adsorption and reaction of propanal and 1-propanol were compared on Ni(111), Fe/Ni(111), and Cu/Ni(111) surfaces by using density functional theory ( ... calculations predict that the binding energy trend of propanal and 1-propanol is Fe/Ni(111) > Ni(111) > Cu/Ni(111). For propanal the Ni(111) surface shows the highest reforming ... total decomposition activity, attributed to the adsorption of propanal through the O lone pair. For 1-propanol ... the highest reforming and total activity and produces propanal via a selective dehydrogenation pathway while both Fe/ ...
Tópico(s): Electrocatalysts for Energy Conversion
2014 - American Chemical Society | The Journal of Physical Chemistry C
James E. Russo, Song Chung, Kristi Contreras, Brian W. Lian, Jon C. Lorenz, David A. Stevens, Wendy Trousdell,
... N,N-dialkylamino)benzaldehyde analogs as inhibitors of propanal oxidation by mouse liver and human erythrocyte class ... identified as the most potent, reversible inhibitor of propanal oxidation by class I ALDH in spectrophotometric enzyme ... type inhibition with respect to the aldehyde substrates propanal, phenylacetaldehyde, benzaldehyde, and aldophosphamide. DPAB exhibited uncompetitive inhibition ... DPAB, estimated from Dixon plots, were 10 nM (propanal) and 77 nM (phenylacetaldehyde) for mouse ALDH and ...
Tópico(s): Eicosanoids and Hypertension Pharmacology
1995 - Elsevier BV | Biochemical Pharmacology
Sergey A. Krupenko, Conrad Wagner, Robert Cook,
... 2 × 103.Aldehyde dehydrogenase activity was assayed using propanal essentially as described by Lindahl and Evces(23Lindahl ... sodium pyrophosphate buffer, pH 8.5, 5 mM propanal, 1 mM NADP + , and enzyme in a total ... Text PDF PubMed Google Scholar). Kinetic analysis of propanal oxidation by recombinant 10-FTHFDH showed a Km ... The C707A mutant enzyme was unable to oxidize propanal. These results show that the C707A mutant 10- ... C707A mutant also lost the ability to oxidize propanal, while wild type recombinant 10-FTHFDH oxidized propanal ...
Tópico(s): Cancer, Hypoxia, and Metabolism
1995 - Elsevier BV | Journal of Biological Chemistry
Andrew Biaglow, Jelena Šepa, Raymond J. Gorte, Daniel F. S. White,
The adsorption of 2-propen-1-ol and propanal has been studied in H-ZSM-5 using ... product, formed between 400 and 425 K, is propanal, formed through either a secondary cation or an epoxide intermediate. The intact desorption of propanal at low coverages was also observed in this ... 2-propen-1-ol confirm the formation of propanal and condensation products of propanal. Finally, a potential energy model based on gas- ...
Tópico(s): Thermal and Kinetic Analysis
1995 - Elsevier BV | Journal of Catalysis
Mingrui Li, Yuping Zhou, Isaac Nartey Oduro, Yunming Fang,
Comparative study on catalytic conversion of methanol and propanal over Ga/ZSM-5 is reported in this ... detailed characterization and catalytic evaluation in methanol and propanal conversion reactions. It was found that the post- ... days. On the contrast, the catalyst lifetime in propanal conversion was kept constantly at 8 h over ... of zeolite after post-modification in methanol and propanal conversion are due to the reactivity difference between methanol and propanal.
Tópico(s): Catalysis for Biomass Conversion
2015 - Elsevier BV | Fuel