thermal and catalytic conversion of gas impurities

... studies of the reductive half-reaction of AADH Studies of the reductive half-reaction were performed to allow comparison of kinetic parameters for native and recombinant AADH Reduction of the TTQ cofactor ... orf-4 and hemE) all putatively transcribed in the same direction [7] The second and fifth genes (aauA and aauB) encode the large and small subunits of AADH, respectively The genes aauD and aauE ... analysed and intermediates of the reaction identified by global analysis and numerical integration methods using prokin software (Applied Photophysics) In studies of the temperature dependence of bond...

Ngày tải lên: 19/02/2014, 07:20

... existence of a 2-D hexagonal structure of a p6mm symmetry The distance between two pore centres is about 6nm and the high wall thickness (6-7nm) is beneficial to thermal and hydrothermal stabilities of ... Figure of PS-1 (1% Pt/ SBA-15) sample displays typical peaks of Si and Pt and the result from the quantitative estimation of peak areas gives 0,98% weight content of platinum This means that most of ... activity and selectivity in the oxidation of glucose When increasing the content of Pt loading, most Pt nanoparticles aggregated outside the channels of SBA-15 with size of 10-15nm and catalytic...

Ngày tải lên: 05/03/2014, 11:21

... [20]: koff ẳ koff2ị ẵibuprofen=K2 ẵibuprofenị ỵ koff3ị ẵibuprofen=K3 ẵibuprofenịị ỵ kỵ off 7ị where koff(2) and koff(3) indicate values of koff occurring at K2 < [ibuprofen] < K3, and at ... functional and structural properties of domains I and II [i.e of the 1382 region of (t)HSA] l The values of the Hill coefcients (n1, n2, and n3) for ibuprofen binding to tHSAheme and HSAheme ... low-afnity sites of tHSAheme-Fe(III) and HSAheme-Fe(III) [represented by a and (1 a), respectively, in Eqn (1)] are 0.18 and 0.82, and 0.14 and 0.86, respectively (Table 1) Effect of ibuprofen on peroxynitrite...

Ngày tải lên: 06/03/2014, 01:20

... head domain of up to 4.3 A, and of exposed parts of the Rossmann domain of up to 2.7 A, are observed For the rest of the homotetrameric assembly, only smaller backbone displacements of up to ... Data processing and evaluation were performed using the origin 7.5 software Crystallization, data collection and renement of the E542K and L537G mutants Crystals of the E542K, L537G and E542K L537W ... was measured for wild-type P2Ox and TmP2Ox variants at different temperatures and at a constant pH of 6.5, and the inactivation constants, kin, and half-life of denaturation, s1 2, were determined...

Ngày tải lên: 07/03/2014, 03:20

... GdnHCl-induced midpoints were 1.7 and 1.6 M GdnHCl after h of incubation and 1.1 and 1.0 M GdnHCl after 24 h of incubation for 80 and 10 lM FdTt, respectively Thermally induced FdTt unfolding ... nm, characteristic of the presence of secondary structure Both CD bands lose intensity as the protein unfolds (Fig 2C), and the CD spectrum on unfolding resembles that of a random-coil polypeptide ... Understanding and probing protein stability at high temperatures and extreme conditions is relevant for a variety of biochemical and biotechnological applications Intriguingly, the stability of a...

Ngày tải lên: 16/03/2014, 23:20

... densitometric analysis revealed a molar ratio of CooS to CooH, the catalytic subunit of the hydrogenase, of 2.1 ± 0.1 : and a molar ratio of CooF to CooH of 1.9 ± 0.1 : The same results were obtained ... mass of a complex containing a single copy of each hydrogenase subunit (CooM, K, L, X, U and H) and two copies of each CO dehydrogenase subunit (CooF and CooS) with a calculated molecular mass of ... concentration of CooS and CooF being % twofold higher than the concentration of CooH, the catalytic subunit of the hydrogenase A hydrogenase preparation containing a lower or zero content of CO dehydrogenase...

Ngày tải lên: 23/03/2014, 21:20

... structure of Bha-RNase H with the substrate and metal ions (yellow) The positions of the RNA strand of the substrate with the scissile phosphate group between R()1) and R(0) and two metal ions A and ... type RNases H However, Arg118 of Sto-RNase HI is located in the same position as His124 of Eco-RNase HI, His539 of HIV-1 RNase H and Glu188 of Bha-RNase H Mutation of this residue to Ala considerably ... Prokaryotic RNases H T Tadokoro and S Kanaya Fig Stereoview of the active site structures of RNases H The side chains of the active site residues of Sto-RNase HI (salmon) and HIV-1 RNase H (green)...

Ngày tải lên: 30/03/2014, 02:20

... According to Parry and Clark [37], expression of the ybiK gene responded to the presence of cysteine and to defects in the cysB gene, and the ybiK knockout mutation impaired the use of glutathione ... in the presence of a-ketoglutarate, and (c) formation of NAD+ after malate dehydrogenase (MDH)-mediated reduction of oxaloacetate to malate with NADH as cofactor The decrease of NADH concentration ... identification of Thr179 (and its Thr193 analog in LlA) as the catalytic nucleophile and the classification of both enzymes as Ntn-hydrolases The kinetic experiments demonstrate that LlA and EcAIII...

Ngày tải lên: 30/03/2014, 15:20

... carried out the reduction reaction of 4-nitrophenol by NaBH4 Figure Nanoflower and satellite-like structures of AuNPs (a) “Nanoflower” and (b, c) “satellite structures” of AuNPs Premkumar et al Nanoscale ... spectra of the reduction of 4-nitrophenol in the presence of AuNPs UV-visible absorption spectra of (a) 4nitrophenol and (b) successive UV-vis absorption spectra (1-min interval) of the reduction of ... the Ministry of Education, Science and Technology (MEST) of Korea (Project no R31-10026) Author details Department of Materials Science and Engineering, Gwangju Institute of Science and Technology...

Ngày tải lên: 20/06/2014, 22:20

... ultrasonication time effects on sediment and the thermal conductivity of the carbon nanotubeethylene glycol nanofluids and found that thermal conductivity of the nanofluids increased with sonication ... B and n are constants, and t is the sonication time The data in Figures 13 and 14 were fit to curves of the forms given by (Equations and 2) The values of the constants and the coefficients of ... effects on -2- the size of agglomerates and the length of the nanotubes, which are significant factors affecting the thermal conductivity and the viscosity of the nanofluids The results are compared...

Ngày tải lên: 21/06/2014, 17:20

... Sn#1000 Conversion/ Selectivity (%) Conversion/ Selectivity (%) ð1Þ The effects of the process of segregation and de-mixing of these rare earths on the SnO2 catalytic properties were studied and compared ... 200 250 Time (min) 100 Conversion/ Selectivity (%) Fig Catalytic performances of undoped and Y- and Cedoped SnO2 samples in the steam reforming of ethanol Legends: j = C2H5OH conversion; d = H2; ... also by acidic sites of the oxide catalysts Thus, it may be suggested that the control of surfaces and modifications of the nanostructures of the tin oxide particles, undoped and doped with rare...

Ngày tải lên: 22/06/2014, 01:20

... CTBN and the EP, and to investigate the thermal, mechanical, and morphological properties of the modified EP EXPERIMENTAL 2.1 Materials The clear epoxy 331, with an epoxide equivalent weight of ... gel temperature, and cure temperature) of the EP are influenced by the amount of CTBN A predetermined amount of the EP was cured with a stoichiometric content of the curing agent and various CTBN ... flexural strength and modulus of modified EPs A similar trend was found in the case of the tensile properties; the flexural strength and modulus of modified EPs are lower than those of the unmodified...

Ngày tải lên: 07/08/2014, 14:20

... 13, 20, 40 and 60 nanocomposites 3.1 Influence of Nafion Resin Load Figure 7(a) shows the catalytic activity of unsupported Nafion resin, and Figure 7(b) shows the catalytic activity of NR/S nanocomposites ... Amount of Nafion resin on silica (wt%) (b) Figure 7: Conversion (●), selectivity (○) and yield (▼) of methyl laurate from the esterification of lauric acid and methanol as a function of (a) Nafion ... the formation of Journal of Physical Science, Vol 20(2), 23–36, 2009 31 Catalytic Performance (%) hydrogen bonds between the sulphonic groups of the resin and the alcohol molecules of the reaction...

Ngày tải lên: 07/08/2014, 14:20

... properties of porous AC and preparation methods of mesoporous AC, and mixed conductive ceramic membrane including the background of mixed conduction, mechanism of oxygen separation, POM into syngas and ... of LBFZ, YSZ60-LBFZ40 and 99 xii CGO60-LBFZ40 membranes as a function of temperature Figure 5.7 O2-TPD profiles of LBFZ, YSZ60-LBFZ40 and CGO60-LBFZ40 samples 101 Figure 5.8 SEM micrographs of ... of LBFZ, YSZ and YSZ60-LBFZ40 96 Figure 5.4 TPR profiles of LBFZ, CGO60-LBFZ40 and YSZ60-LBFZ40 98 Figure 5.5 XRD patterns of LBFZ, CGO60-LBFZ40 and YSZ60-LBFZ40 samples before and after TPR...

Ngày tải lên: 09/09/2015, 10:13

... the preparation of a broad range of NSHC- and NNHC-complexes and a study of their catalytic activity, and includes a comprehensive introduction (Chapter 1) as well as the reviews of the relevant ... Structure and Catalytic Application of Novel Carbene Complexes with Benzothiazolin-2-ylidene Ligands Chapter One: Introduction The Comparison of NSHC- and NNHC- Metal Complexes hydrogenation of the ... Structure and Catalytic Application of Novel Carbene Complexes with Benzothiazolin-2-ylidene Ligands Chapter One: Introduction The Comparison of NSHC- and NNHC- Metal Complexes carbon resonances of...

Ngày tải lên: 14/09/2015, 08:43

... Formation and Structures of Pd(II) NSHC-Pyridyl Mixed-Ligand Complexes Section 2.8: Benzothiazolin-2-ylidene and Azole Mixed-Ligand Complexes of Pd(II) Section 2.9: Structures and Suzuki-Coupling of ... of PEPPSI and selected examples of other dinuclear complexes with mixed ligands of NSHC and bipyridyl or pyrazine-based heterocycles The use of nitrogen 79 Synthesis, Structure and Catalytic ... Synthesis, Structure and Catalytic Application of Novel Carbene Complexes with Benzothiazolin-2-ylidene Ligands Chapter two: Results and Discussion Part I 2.3 Synthesis of Mono-, Bis- and Dinuclear...

Ngày tải lên: 14/09/2015, 08:43

... cyclohexyl rings of complex 2.10(a) have relatively high thermal parameters and one of them is disordered into two positions at a 50:50 ratio 161 Synthesis, Structure and Catalytic Application of Novel ... asymmetric unit of the cell The two terminal carbon atoms of the propyl substituents of both molecules of C are disordered into two positions of occupancy ratio 55/45 The hydrogen atoms of complex ... Synthesis, Structure and Catalytic Application of Novel Carbene Complexes with Benzothiazolin-2-ylidene Ligands Chapter Three: Experimental Experimental 3.2.4 Synthesis of Complexes 2.2(b) and 2.9-2.11...

Ngày tải lên: 14/09/2015, 08:43

... Chapter Four Conclusion and Summary coupling of aryl bromides and activated aryl chlorides and give good conversions of diaryl products Complexes 2.1-2.4, cis-2.5, 2.6-2.7 ... synthesis and characterization of a range of mixed-NSHC-L Pd(II) complexes (L = phosphine, aromatic N-heterocycles, pyridyl and azole ligands (2.9-2.27)) They are obtained from bridge cleavage of dinuclear ... NSHC complexes of type [PdBr2(NSHC)]2 (2.2(a)2.2(b) and 2.17) complexes with different nucleophilic ligands Complexes 2.9-2.16 are active in the Suzuki–Miyaura coupling reactions of selected aryl...

Ngày tải lên: 14/09/2015, 08:43

... spectrum of formaldehyde, one of the products of C-C bond dissociation of CF3CH2O was not observed under a range of nitrite and argon buffer gas pressures Similar results were obtained when thermal ... vibrational bands of both reactants and products 1.2 Reactions of O(3P) atoms with CS2 Reactions of oxygen atoms are very important in basic chemical kinetics and dynamics and are of relevance ... photolysis of nitrite species results in the formation of OH radical [24] and hence their uses as precursors of OH radicals in the studies of kinetics and mechanisms of the reactions of OH radicals...

Ngày tải lên: 15/09/2015, 17:11

... dependence on the thermal, physical and chemical properties of ultra-thin films of selected polymers In the first part of our study, we investigate the thermal and physical properties of hydrophilic ... thermal and transport properties when the film thickness approaches the bulk radius of gyration (Rg).9 Thus with important factors such as thickness of the films and the chemical properties of ... One disadvantage of spin coating is it requires the use of solvents and the choice of solvent often must fulfill the following considerations: environmental issues, miscibility, and its effects...

Ngày tải lên: 05/10/2015, 19:04