substitution reactions of aromatic compounds

... groups of anaerobic bacteria in aromatic biodegradation 11  Table 2-6 Bacterial utilization of aromatic compounds 14  Table 2-7 Enzymes associated with biodegradation of aromatic compounds ... ANALYSIS OF PSEUDOMONAS PUTIDA IN BIODEGRADATION OF AROMATIC COMPOUNDS CAO BIN (B Eng., Beijing University of Aeronautics and Astronautics, China) A THESIS SUBMITTED FOR THE DEGREE OF DOCTER OF PHILOSOPHY ... and objectives of this thesis Published research in biodegradation of aromatic compounds and the current status of the state -of- the-art techniques in proteomics and the applications of proteomics...

Ngày tải lên: 12/09/2015, 08:19

Ngày tải lên: 13/11/2014, 16:04

... PRESENTATION are of six types The selection of compounds for DFC is broad Included Structural headings (WA) classify naturally occurring are all compounds or group of compounds of interest or food ... indication of crystal form and of recrystallisation solvent is often given but these are imprecise items of data; most compounds can be crystallised from several solvent systems and the crystal form often ... consists of a letter of the alphabet followed by a number, e.g., A-124 All index entries THE TYPE OF COMPOUND INDEX refer to the DFC number This is a most important feature of DFC Every compound of...

Ngày tải lên: 16/09/2013, 21:58

... presence of nonadsorbable compounds, the biodegradation of compounds in a biologically active column, slow adsorption of a fraction of the molecules present, and the critical depth of the column ... ADSORPTION OF ORGANIC COMPOUNDS 13.17 FIGURE 13.12 Effect of biodegradation and the presence of nonadsorbable compounds on the shapes of breakthrough curves steam and CO2 at temperatures of 800 to ... heterogeneous mixture of compounds The small fraction of strongly adsorbable compounds is often overlooked when determining an isotherm because of the analytical difficulty of obtaining good data...

Ngày tải lên: 14/02/2014, 03:20

... III Naming Aromatic Compounds Aromatic Compounds are cyclic hydrocarbons containing a benzene structure Benzene can be represented by the resonance structures: The actual structure of benzene, ... chemical and physical properties of another class of compounds A Halogen Derivatives of Hydrocarbons Functional Group: - X (F, Cl, Br, I) General Formula: R-X Naming of Halides Halogens attached ... alkanes are straight chained compounds, as shown in the previous table, they can have side chains or branches These variations of compounds which have the same number of carbon and hydrogen atoms,...

Ngày tải lên: 14/02/2014, 08:20

... 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...

Ngày tải lên: 19/02/2014, 12:20

Ngày tải lên: 19/02/2014, 15:20

... (ASA) of individual residues in the API variants were calculated with the INSIGHT II/DISCOVER software The radius of the solvent ˚ probe was 1.4 A Measurement of 1H-NMR The pH-dependent 1H-NMR of ... effect of the size of the residue at position 169 may be related to the solvent accessibility of the side-chain of His210 (Fig 3C) When the accessibility of the side-chain of His210 increased, ... the side-chain of residue 210 Molecular mechanism of aromatic stacking for the optimum pH shift Fig shows the charged state of key residues involved in the catalytic activity of API For wild-type...

Ngày tải lên: 21/02/2014, 03:20

... Activation of the acetyl phosphate synthesis activity of E coli Pta by different concentrations of pyruvate and PEP Results are presented as percentage of activity in the presence of PEP or pyruvate ... high acetate concentration (B) Regulation of the forward and reverse Pta reactions Pta catalyzes both the synthesis and degradation of acetyl-CoA These two reactions are differentially regulated ... in part, the inhibitory effects of both NADH and ATP (Fig 5A) In the case of pyruvate, although partial reversal of NADH inhibition was observed, total reversal of ATP inhibition was found (Fig...

Ngày tải lên: 06/03/2014, 11:20

... 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 ... elemental analysis; in all cases, the purity of the compounds was higher than 98% Further evidence for the correct identification of the obtained compounds is provided by electronic spectra and ... 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]...

Ngày tải lên: 07/03/2014, 21:20

... Furthermore, a prediction of the secondary structure of TK1 [30–32] places Val106 in the middle of an a-helix which aligns in CLUSTAL [33] with one of the interface helices (a-helix 4) of HSV1TK This may ... and V106T We then characterized the enzymatic properties of the mutant enzymes The apparent native sizes of the –ATP forms of V106WT and of the mutant recombinant enzymes (subunit size 24 kDa, ... were eluted essentially as V106WT: a substantial part of each of these enzymes was Fig Gel filtration of rLy-TK166)136 proteins About 100 lg of rLyTK166)136(Val106) (d) and rLy-TK166)136(Met106)...

Ngày tải lên: 16/03/2014, 16:20

... 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...

Ngày tải lên: 16/03/2014, 18:20

... 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 ... disappeared A more detailed assessment of the impact of 15N substitution is possible by inspection of the double difference in trace E which is obtained by subtraction of trace B from trace A in Fig...

Ngày tải lên: 16/03/2014, 18:20

... 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)...

Ngày tải lên: 16/03/2014, 19:20

... base, and generating a list of tentatively identified compounds with their retention times and scan numbers The software must also allow integration of the ion abundance of any specific ion between ... leach organic compounds into the eluting solvent One liter of water should pass through the cartridge in about two hours with the assistance of a slight vacuum of about 13 cm (5 in.) of mercury ... acetone at a concentration of 500 µg/mL of each This solution is used in the preparation of the calibration solutions Dilute a portion of this solution by 10 to a concentration of 50 µg/mL and use this...

Ngày tải lên: 22/03/2014, 14:20

... properties to Program Offices (e.g., Office of Water, Office of Solid Waste and Emergency Response, Office of Prevention, Pesticides and Toxic Substances) and Regional Offices Also, SPARC has been used ... interactions of the P with the two states δrespKa describes the change in the delocalization of π electrons of the two states due to P This delocalization of π electrons is assumed to be into or out of ... chemical constants of chemical compounds has greatly accelerated both in industry and government as assessments are made of potential pollutant exposure and risk Although a wide variety of approaches...

Ngày tải lên: 22/03/2014, 14:20

... potential of CO2† – , the radical catalyzes reduction of Fe(III) [12] and reductive dehalogenation of recalcitrant aromatic halides [31] O2† – catalyzes oxidation of Mn(II) and reduction of Fe(III) ... products of pentafluorobenzyl oxime [26] (data not shown) The reactions of MnP in four different buffers clearly demonstrate that the formation of glyoxal was significantly stimulated by the presence of ... linoleic Fig Mass chromatograms of PFBO derivatives of products of lipid peroxidation by C subvermipora MnP and soybean lipoxygenase at m/z 181 (A) Products of the oxidation of linoleic acid by MnP in...

Ngày tải lên: 24/03/2014, 04:21

... where N ¼ the number of strand breaks per molecule of PM2, I ¼ the percentage of supercoiled PM2 DNA, and II ¼ the percentage of open circular PM2 DNA The overall number of strand breaks per ... concentrations of the respective selenium compounds Furthermore, no inhibition was observed with up to mM methionine Effect of selenium compounds on XPA-DNA binding Results Effect of selenium and ... concentrations of selenocystine (lanes 3–10), the intensity of band decreased Nevertheless, instead of free oligonucleotide, which would be expected in the event of diminished XPA–DNA binding, a new band of...

Ngày tải lên: 30/03/2014, 15:20

... Decahydronaphthalene~ Aromatic phenols Thiophenols Aromatic amine" 11 N itrobenzenf'll 10 12 13 14 15 16 Ii 18 19 20 21 22 Aromatic alcohols (Phenyl ethyl alcohols) Aromatic ketones Aromatic esters ... Density at 20° C., etc., g./ml a, b: Constants of Law of Rectilinear Diameters, dv + dL = a + bt d = density of the vapor, g./ml.; dL = density of the liquid, g./ml ng', etc.: Refractive index ... = I/Vg Inserting these values of vapor density we then solve the two equations for the values of A'· and B /• as in the case of A· and B· Ac, Bc, Cc: Constants of the Antoine vapor pressure equation...

Ngày tải lên: 01/04/2014, 10:10

... chemical compounds exist To make the study of these compounds easier, chemists divide them into a number of categories Nearly all compounds can be classified as either organic or inorganic Organic compounds ... form of an element with the usual number of protons in the nucleus but more or less than the usual number of electrons • K KREBS CYCLE A series of chemical reactions in the body that form part of ... range of physiological functions, such as control of blood pressure, contraction of smooth muscles, and modulation of inflammation PROTEIN A large, complex compound made of long chains of amino...

Ngày tải lên: 01/04/2014, 10:13