metabolic reactions of polycyclic aromatic hydrocarbon epoxides
determination of polycyclic aromatic hydrocarbon pahs and aliphatic hydrocarbons in oysters by gc msms
... characterize the source of hydrocarbon contamination 10.2 PAHs The occurrence of one or more of any of the 16 PAHs of food safety concern is indicated by the presence of transition ions (quantifier ... to these offices, Thermo Fisher Scientific maintains a network of representative organizations throughout the world Figure 5: Comparison of hydrocarbon distribution of different type of oils showing ... matched against that of crude oil sample from the Gulf of Mexico The composition of crude oil from the Gulf of Mexico is given in Table indicating relatively high levels of n-hexadecane, n-heptadecane...
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báo cáo khoa học: " Transcriptional responses to polycyclic aromatic hydrocarbon-induced stress in Arabidopsis thaliana reveal the involvement of hormone and defense signaling pathways" pdf
... phytotoxicity and polycyclic aromatic hydrocarbon contamination in Salicornia fragilis Sci Total Environ 2007, 381:146-156 Oros DR, Ross JRM, Spies RB, Mumley T: Polycyclic aromatic hydrocarbon (PAH) ... higher plants exposed to polycyclic aromatic hydrocarbons and their N-heterocyclic derivatives Environ Toxicol Chem 2006, 25:3238-3245 Burritt DJ: The polycyclic aromatic hydrocarbon phenanthrene ... well as the suggested follow-on research, will be of great value in breeding and engineering plants for phytoremediation of polycyclic aromatic hydrocarbons Conclusions The microarray experiments...
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Effect of Surfactant on Degradation of Polycyclic Aromatic Hydrocarbons (pahs) in Thermophilic Anaerobic Co-Digestion of Sludge from Kim-Ngưu River and Organic Waste
... Biodegradation aspects of Polycyclic Aromatic Hydrocarbons (PAHs): A review, Journal of Hazardous Materials 169 (2009) 1-15 Bach Quang Dung, Enhancement of intrinsic bioremendiation of PAHs-contaminated ... aromatic hydrocarbon (PAH) content of archived sewage sludges Chemosphere 20 (1990) 703-716 F Busetti, A Heitz, M Cuomo, S Badoer, P Traverso, Determination of sixteen polycyclic aromatic hydrocarbons ... analysis of polycyclic aromatic hydrocarbons in sewage sludge from wastewater treatment plants, Journal of Chromatography A 938 (2001) 57-65 S.R Wild, S.P McGrath, K.C Jones, The polynuclear aromatic...
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Báo cáo khoa học: Adventitious reactions of alkene monooxygenase reveal common reaction pathways and component interactions among bacterial hydrocarbon oxygenases ppt
... reaction with the alkyne, at a range of concentrations, in the presence of NADH (100 lm) The decay of enzyme activity as a function of 2667 Adventitious reactions of alkene monooxygenase time was ... activity was measured as a function of the time between the start of the reaction (addition of NADH) and removal of the alkyne by flushing with nitrogen First-order decay of enzyme activity was observed, ... underestimated The positive deviation of the latest data points from the extrapolated linear 2663 Adventitious reactions of alkene monooxygenase Fig Kinetics of inactivation of AMO by (A) propyne and (B)...
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Design of a promoter to enhance the stability of catalysts for hydrocarbon reactions 1
... energy of –760 kJ/mol, white circles indicate unsaturated edge atoms with a carbon binding energy of –635 kJ/mol 79 Figure 4.13 The total energy of cluster as a function of the number of atoms ... Saeys, “Effect of boron on the stability of Ni catalysts during steam methane reforming”, Journal of Catalysis, in press Jing Xu, Mark Saeys “First principles study of the effect of carbon and ... molecular level understanding of the coking mechanism on Ni catalysts, the stability of different forms of carbon that can exist on Ni catalyst and the kinetics of carbon diffusion were studied...
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Design of a promoter to enhance the stability of catalysts for hydrocarbon reactions 2
... analysis of the effect of carbon and boron on the activity of a Ni catalyst is presented in chapter In chapter 6, an experimental validation of the proposed effect of boron on the stability of a ... adsorption of CH4 is the rate-limiting step of the steam reforming process (Besenbacher et al., 1998) The breaking of the C-H bond in the adsorption of CH4 occurs on top of a Ni atom, with a barrier of ... consists of a two-dimensional rectangular cluster of about 10 atoms and 3-5 atom layer thickness with a large vacuum layer on top of it, resulting in a model consisting of an infinite 2D slab of 3-5...
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The influence of surfactants on the solubilization, extraction and biodegradation of model polycyclic aromatic hydrocarbons
... EFFECTS OF SURFACTANT ON BIODEGRADATION OF MODEL POLYCYCLIC AROMATIC HYDROCARBONS LI JINGLIANG (M Eng TIANJIN UNIV) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMICAL ... of wt% Tergitol 15-S-5 101 5.4 Cloud point of Tergitol 15-S-7 as a function of surfactant concentration 102 5.5 Effect of Inorganic Salts on Cloud Point of wt%Tergitol 15-S-7 104 5.6 Effect of ... of interest There are many factors that can affect the partition of solutes Several authors have studied the effect of various experimental factors on the partition mainly of polar aromatic hydrocarbons...
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Tài liệu Ambient air pollution by Polycyclic Aromatic Hydrocarbons (PAH). Position Paper pptx
... KH-41-01-373-EN-N Ambient air pollution by Polycyclic Aromatic Hydrocarbons (PAH) Position Paper ISBN 92-894-2057-X OFFICE FOR OFFICIAL PUBLICATIONS OF THE EUROPEAN COMMUNITIES L-2985 Luxembourg ... acknowledged Ambient Air Pollution by Polycyclic Aromatic Hydrocarbons (PAH) Position Paper July 27th 2001 Prepared by the Working Group On Polycyclic Aromatic Hydrocarbons PAH Position Paper July ... are often based on a limited number of samples The factors often exhibit a wide range of values - consequently their use can lead to widely differing estimates of emissions from the same type of...
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Tài liệu Báo cáo khoa học: Metabolic control of mitochondrial properties by adenine nucleotide translocator determines palmitoyl-CoA effects Implications for a mechanism linking obesity and type 2 diabetes pdf
... method of Metabolic Control Analysis To assess the control of fluxes and intermediates, we took a modular approach (Fig 5) B Metabolic control of fluxes Fig Effect of palmitoyl-CoA on the kinetics of ... for 68% of the decrease in Jo, 68% of the decrease in Jp, 56% of the increase in the QH2 ⁄ Q ratio, 70% of the increase in Dw, 72% of the increase in the ATPin ⁄ ADPin ratio, and 59% of the decrease ... analysis, we established that the primary cause of the effects of palmitoyl-CoA was inhibition of the ANT Assessment of the metabolic control of fluxes and intermediate concentrations by the ANT...
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Tài liệu Báo cáo khóa học: Quantitative analysis, using MALDI-TOF mass spectrometry, of the N-terminal hydrolysis and cyclization reactions of the activation 2 process of onconase pdf
... using the purified recombinant protein, the conversion of reagents and products of the exopeptidasecatalyzed hydrolysis of Met1 and cyclization of Gln1 to pyroglutamyl were monitored at different ... of saturated sinapinic acid in the same solvent of the matrix, and 0.5 lL of the mixture was immediately applied to a sample probe spot Protein expression Cyclization reaction as a function of ... and expressing it as the fraction of hydrolyzed (Met1)-ONC (M23L) Figure shows the results of the characterization of the hydrolysis reaction as a function of guanidinium chloride concentration...
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Tài liệu Báo cáo khoa học: A novel coupled enzyme assay reveals an enzyme responsible for the deamination of a chemically unstable intermediate in the metabolic pathway of 4-amino-3-hydroxybenzoic acid inBordetellasp. strain 10d doc
... peak of the purified enzyme at 266 nm The typical protein absorption peak of 280 nm shifts to 265 nm if the protein contains a flavin-type cofactor [28] We failed to identify the cofactor of the ... enzymes (A) The reaction mixture consisted of 2.9 mL of 100 mM sodium/potassium phosphate buffer (pH 7.5), 0.1 mL of mM 4-amino-3-hydroxybenzoic acid, and 0.05 mL of the crude extract (35–75% ammonia ... every (B) The reaction mixture consisted of 2.9 mL of 100 mM sodium/potassium phosphate buffer (pH 7.5), 0.1 mL of mM 4-amino-3-hydroxybenzoic acid, 0.1 mL of purified 4-amino-3-hydroxybenzoate 2,3-dioxygenase...
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Báo cáo khoa học: Increased NADPH concentration obtained by metabolic engineering of the pentose phosphate pathway in Aspergillus niger docx
... is a general feature of all the PPP genes of A niger still remains to be shown Transformations of A niger to obtain overexpression of gndA, gsdA and tktA With the purpose of overproducing the ... square (PLS) regressions For future metabolic engineering of strains with the purpose of obtaining increased NADPH levels and for the understanding of the regulation of the NADPH level it is important ... third quadrant of Fig 4A have a tendency to a high erythritolI level, because this variable is in the third quadrant of Fig 4B A total of 85% of NADPH is explained on the basis of two principal...
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Báo cáo khoa học: Reactions of gold(III) complexes with serum albumin docx
... addition of a solution of 1,2-ethylendiamine monohydrate in ether to a solution of HAuCl4 in ether; the yellow precipitate was dissolved in water giving an orange solution A white precipitate of [Au(en)2]Cl3 ... stoichiometric excess of cyanide The UV-Vis spectra were recorded before and immediately after the addition of a concentrated solution of sodium cyanide Reaction with imidazole The interaction of [Au(bipyc-H)(OH)][PF6] ... [Au(bipyc-H)(OH)][PF6] Further information on the reactions of gold(III) complexes with BSA was gained by the application of classical biochemical separation techniques The main goal of these experiments was to provide...
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Ambient Air Pollution by Polycyclic Aromatic Hydrocarbons (PAH): Position Paper Annexes pptx
... 1994 Polycyclic Aromatic Hydrocarbons in U.K Urban Air Environ Sci Technol 28: 2380-2386 MENICHINI E., MONFREDINI F & MERLI F 1999 The temporal variability of the profile of carcinogenic polycyclic ... 4-nitroacenapthylene 1-nitrofluorene 2-nitrofluorene 3-nitrofluorene 4-nitrofluorene two nitroisomers 1-nitroanthracene 2-nitroanthracene 2-nitrofluoranthene 7-nitrofluoranthene 8-nitrofluoranthene 2-nitropyrene ... Environmental Health Criteria 202, Selected Non-heterocyclic Aromatic Hydrocarbons, 1998 and NIST Special Publication 922, Polycyclic Aromatic Hydrocarbon Structure Index, Lane C Sander and Stephen...
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Tropospheric Air Pollution: Ozone, Airborne Toxics, Polycyclic Aromatic Hydrocarbons, and Particles potx
... Academy of Sciences, Polycyclic Aromatic Hydrocarbons: Evaluation of Sources and Effects (National Academy Press, Washington, DC, 1983) 102 G Grimmer, Ed., Environmental Carcinogens: Polycyclic Aromatic ... 99 National Academy of Sciences, Particulate Polycyclic Organic Matter (National Academy Press, Washington, DC, 1972) 100 A Bjørseth, Ed., Handbook of Polycyclic Aromatic Hydrocarbons (Dekker, ... is formed by the oxidation of NO (the major nitrogenous byproduct of combustion) after dilution in air This conversion of NO to NO2 occurs as part of the oxidation of organic compounds, initiated...
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Báo cáo khoa học: Brain succinic semialdehyde dehydrogenase Reactions of sulfhydryl residues connected with catalytic activity pdf
... deletions in the genomic level would be causative of SSADH deficiency [11,12] Despite the importance of SSADH in the metabolism of GABA, the structural studies of the enzyme have not yet been well investigated ... for the inactivation of DABIA was 168 M)1Æmin)1, as determined from the slope of this plot In an effort to demonstrate that DABIA is bound to sulfhydryl groups of SSADH, lM of SSADH was incubated ... extinction coefficient of 29 000 M)1Æcm)1 at 436 nm DABIA gave overall incorporation values of about 7.5 mol per enzyme tetramer, indicating that mols of sulfhydryl groups of SSADH were masked...
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Báo cáo khoa học: Light-induced reactions of Escherichia coli DNA photolyase monitored by Fourier transform infrared spectroscopy pot
... aimed at an elucidation of a detailed molecular picture of the light-driven DNA repair process Results Construction of a DNA photolyase E109A mutant MTHF, the second cofactor of E coli DNA photolyase, ... photolyase to a level of about 15% of total cell protein Purification by published procedures afforded the blue radical form of the mutant enzyme The yield of isolated protein was about twofold higher ... redox-active cofactor [15–17] Both 5,10-methenyltetrahydrofolylpolyglutamate (MTHF) and 8-hydroxy-5-deazaflavin serve as light-harvesting cofactors in DNA photolyases [18–20] DNA photolyase of E coli...
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Báo cáo Y học: DNA supercoiling in Escherichia coli is under tight and subtle homeostatic control, involving gene-expression and metabolic regulation of both topoisomerase I and DNA gyrase docx
... weak the effect of topoisomerase I on supercoiling actually was, can be quanti®ed in terms of the control coef®cient of metabolic control analysis [20,21] With respect to the control of DNA supercoiling ... derivative gyrase of the ®tted curve at each point of the graph with the quotient of the respective x/y coordinates At wild-type level of supercoiling an elasticity coecient of )1.6 was calculated ... factor of perhaps 500 required to counteract the effect of topoisomerase I and explain that supercoiling only varied by 50% (Fig 2) This lack of response of gyrase expression to the modulation of...
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