oxidation incineration and catalytic oxidation

Tài liệu Báo cáo khoa học: Critical roles of Asp40 at the haem proximal side of haem-regulated phosphodiesterase from Escherichia coli in redox potential, auto-oxidation and catalytic control doc

Ngày tải lên : 19/02/2014, 16:20

... potential and auto -oxidation rates of Ec DOS PAS, and catalytic activities of full-length enzymes We found that the mutations at Asp40 markedly altered the redox potential and auto -oxidation ... potentials, auto -oxidation rates and catalytic activities of Ec DOS Breakage of the salt bridge between Asp40 and Arg85, and the hydrogen bond network consisting of Asp40, two water molecules and His77, ... rates, redox potentials and auto -oxidation rates of the Asp40Ala and Asp40Asn mutants of Ec DOS PAS Cyanide binding rate, experimental errors are within 20%; kox, autoxidation rate; t1/2, Half...

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Báo cáo " Study on the characteristics and catalytic properties of Pt/SBA-15 in the selective oxidation of D-Glucose " potx

Ngày tải lên : 05/03/2014, 11:21

... 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 ... Synthesis and characterization of Bimetallic Pt-Au clusterderived catalyst Catalysis Today, 125, 269-274, 2006 [5] A.Corma and Hermenegilldo Garcia Nanoparticles and catalysis Wiley-VCH Verlag GmbH and ... 88.62 Ǻ (24h) to 93.87Ǻ (48h) and 97.43Ǻ (72h) In these XRD patterns, we also see that two weak peaks indexed as (110) and (200) diffractions of 24h sample are not clear and the intensity of these...

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Báo cáo hóa học: " Preparation of Pt Ag alloy nanoisland/graphene hybrid composites and its high stability and catalytic activity in methanol electro-oxidation" potx

Ngày tải lên : 20/06/2014, 22:20

... nanoisland/ graphene hybrid composites and its high stability and catalytic activity in methanol electro -oxidation Nanoscale Research Letters 2011 6:551 Submit your manuscript to a journal and beneﬁt ... density, the ease of handling a liquid, low operating temperature, and their possible applications to micro-fuel cells Electrocatalytic materials restricted the performance and application of DMFCs ... electro -oxidation For Au@Pt nanorods graphene hybrids materials (sample b), no obvious oxidation reduction peak was detected, indicating a poor catalytic performance for methanol electrooxidation...

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Tài liệu Chapter 8: Catalytic oxidations in aqueous media - recent developments ppt

Ngày tải lên : 23/12/2013, 07:19

... In an ethanol/water mixture 88 % yield of 2-hexanone and 92 % yield of 2-hexadecanone was obtained in and h, respectively, with a Catalytic oxidations in aqueous media - recent developments 259 ... oxidants in a biphasic Catalytic oxidations in aqueous media - recent developments 261 catalytic process, preferably with water as one of the phases, for easy product isolation and catalyst recovery ... and sulfonated batophenanthroline (see Scheme 8.1 above) This catalyst was found to oxidize primary and secondary, as well as benzylic and allylic alcohols with close to quantitative yields and...

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Tài liệu Báo cáo khoa học: Tryptophan tryptophylquinone cofactor biogenesis in the aromatic amine dehydrogenase of Alcaligenes faecalis Cofactor assembly and catalytic properties of recombinant enzyme expressed in Paracoccus denitriﬁcans pptx

Ngày tải lên : 19/02/2014, 07:20

... 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 ... cells and media The bacterial strains and plasmids used in this study are listed in Table For strain stocks and DNA isolation, E coli and A faecalis were cultured with Luria–Bertani media at 37 and ... sequence (accession AF302652), shown in emboldened and underlined text, and are as follows: T835 is now C835, C836 is now T836 and an extra T between A1376 and T1377 Underlined amino acid residues denote...

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Báo cáo khoa học: Ibuprofen binding to secondary sites allosterically modulates the spectroscopic and catalytic properties of human serum heme–albumin doc

Ngày tải lên : 06/03/2014, 01:20

... high-afnity and 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 ... (1971) Hemoglobin and Myoglobin in their Reactions with Ligands North Holland Publishing Co., Amsterdam and London Goldstein S, Lind J & Merenyi G (2005) Chemistry of peroxynitrites and peroxynitrates ... nal ibuprofen concentration ranged between 1.0 ã 10)6 and 1.0 ã 10)2 m Peroxynitrite was synthesized from KO2 and NO or from HNO2 and H2O2, and stored in small aliquots at )80.0 C [29,30] The peroxynitrite...

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Báo cáo khoa học: Improving thermostability and catalytic activity of pyranose 2-oxidase from Trametes multicolor by rational and semi-rational design pdf

Ngày tải lên : 07/03/2014, 03:20

... Concomitantly, Phe454 rotates and moves some A to ll the active site and pack against the FAD cofactor In the loop between b-strand B6 in the substrate-binding domain and strand E2 in the hinge domain, ... to synthesize various carbohydrate derivates and rare sugars [12] Amongst others, the oxidation of d-glucose and d-galactose to 2-keto-d-glucose and 2-keto-d-galactose is of applied interest ... interface The A and C subunits are colored yellow and red, respectively For clarity, subunits B and D have been omitted (A) Model 2IGO with Leu537 at the dyad axis between monomers A and C in the...

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Báo cáo khoa học: Replacement of two invariant serine residues in chorismate synthase provides evidence that a proton relay system is essential for intermediate formation and catalytic activity docx

Ngày tải lên : 07/03/2014, 05:20

... the presence of oxidized FMN and EPSP (catalytically inactive ternary complex) has provided the first insight into the binding and relative orientation of the cofactor and the substrate in the active ... available and obtained from Sigma or Fluka (Buchs, Switzerland) DEAE Sephacel was from Amersham Biosciences, and cellulose phosphate (P11) was from Whatman (Kent, UK) DNA restriction and modification ... bacterial, fungal, plant and protozoan origin, of the crystal structure of the enzyme with bound EPSP and of the flavin cofactor, revealed two invariant serine residues – Ser16 and Ser127 – interacting...

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Báo cáo khoa học: Characterization of structural and catalytic differences in rat intestinal alkaline phosphatase isozymes pdf

Ngày tải lên : 07/03/2014, 17:20

... Distances were calculated between OE1 and the metal in hPLAP, and between OE2 and the metal in the rIAPs The metal position was based on the M3 position of hPLAP rIAP-I and rIAP-II are expressed in the ... blotting (Fig 3) In the jejunum, one rIAP band, with an apparent molecular mass of 70 kDa, was present, but two bands of 88 kDa and 75 kDa were detected as rIAP-II and rIAP-I in the duodenum The molecular ... placental alkaline phosphatase (hPLAP) sequence number H153 and H317 in hPLAP are homologous to D153 and K328 in Escherichia coli and to H149 and H316, respectively, in shrimp AP The alkaline phosphatase...

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Báo cáo khoa học: The lactate dehydrogenases encoded by the ldh and ldhB genes in Lactococcus lactis exhibit distinct regulation and catalytic properties ) comparative modeling to probe the molecular basis pdf

Ngày tải lên : 16/03/2014, 05:20

... kinetic parameters (A) and relative activity (B) of LDHB and LDH puriﬁed from L lactis FI9078 and MG1363, respectively Assays were performed in 100 mM Mes ⁄ KOH at the mentioned pH and 30 °C All components ... different between LDH and LDHB Regarding the catalytic differences between LDH and LDHB, namely the strong dependence of kinetic parameters on pH for the latter, for both pyruvate and NADH, the equilibrium ... residues (Ala253 and Val254 in LDH are replaced by Val253 and Ile254 in LDHB) The histidine and arginine residues directly involved in catalysis are identical in the two enzymes, and NADH binding...

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Báo cáo Y học: Puriﬁcation and catalytic properties of a CO-oxidizing:H2-evolving enzyme complex from Carboxydothermus hydrogenoformans doc

Ngày tải lên : 23/03/2014, 21:20

... puriﬁcation and catalytic properties of a membrane-bound enzyme complex from C hydrogenoformans composed of a hydrogenase and a CO dehydrogenases The complex catalyzes the conversion of CO to CO2 and ... Nikon) and protein bands were quantiﬁed using the IMAGEQUANT software (Molecular Dynamics) Alternatively, Coomassie-stained protein bands were excised from SDS gels In general protein bands from ... amino-terminal sequences of the 89- and 62-kDa protein bands were found to be identical Since the 89-kDa band was not observed in boiled samples, this may indicate that this protein band is the dimer of the...

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Báo cáo khoa học: A single intersubunit salt bridge affects oligomerization and catalytic activity in a bacterial quinone reductase pptx

Ngày tải lên : 30/03/2014, 01:20

... Steady-state and rapid reaction parameters for wild-type YhdA and protein variants Turnover measurements were carried out with NADPH and oxygen as substrates The rate of reduction and oxidation ... collection, processing and structure reﬁnement are summarized in Table Molprobity Ramachandran plots [31] showed no outliers in the higher resolution structures (D137L and K109D ⁄ D137K) and 0.6% outliers ... molecular mass estimation by molecular sieve chromatography and DLS and apparent unfolding temperatures Tm in °C as determined by CD spectroscopy and DSC The void volume of the column was determined...

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Báo cáo khoa học: Ribonuclease H: molecular diversities, substrate binding domains, and catalytic mechanism of the prokaryotic enzymes ppt

Ngày tải lên : 30/03/2014, 02:20

... 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 B are also shown ... Eco-RNase HI) and the backbone atoms of Cys148, Ser150, Asn151 and Met212 (Cys13, Gly15, Asn16 and Gln72 for Eco-RNase HI) Similar contacts are observed between Bha-RNase HI and the RNA strand of the ... HI and human RNase H1 C domain are shown in green and gold, respectively The active-site residues are shown as red balland-stick models The basic protrusion and the phosphate binding pocket and...

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Báo cáo khoa học: Expression, puriﬁcation and catalytic activity of Lupinus luteus asparagine b-amidohydrolase and its Escherichia coli homolog potx

Ngày tải lên : 30/03/2014, 15:20

... 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 have ... and asparagine result in unexpected covalent inhibtions and suggests an unusual catalytic triad ThrTyr-Glu Biochemistry 39, 1199–1204 10 Sugimoto, H., Odani, S & Yamashita, S (1998) Cloning and ... diagnostics and future therapeutic interventions Scand J Clin Laboratory Invest 53, 19–27 Geiger, T & Clarke, S (1987) Deamidation, isomerization, and racemization at asparaginyl and aspartyl...

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Báo cáo hóa học: " Shape-tailoring and catalytic function of anisotropic gold nanostructures" doc

Ngày tải lên : 20/06/2014, 22:20

... 10, and 25 wt.% concentrations of detergent; and mM and wt.% concentrations of Au precursor and detergent, respectively (Table 1) Transmission electron microscopy (TEM) image (0.4 mM Au salt and ... azacryptand and their applications in SERS and catalysis J Colloid Interface Sci 2007, 316:476-481 doi:10.1186/1556-276X-6-547 Cite this article as: Premkumar et al.: Shape-tailoring and catalytic ... 2.7 used for the synthesis of triangle and spherical nanoparticles, and the final concentration between the Au precursor and detergent was maintained at mM and wt %, respectively Interestingly,...

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Báo cáo hóa học: "Inﬂuence of Rare Earth Doping on the Structural and Catalytic Properties of Nanostructured Tin Oxide" docx

Ngày tải lên : 22/06/2014, 01:20

... Sn#1000, Y-doped SnO2 samples calcined at 550 and 1,000 °C, SnY#550 and SnY#1000, respectively, and Ce-doped SnO2 samples calcined at 550 and 1,000 °C, SnCe#550 and SnCe#1000, respectively) were previously ... strength distribution, and catalytic activity/selectivity, were inﬂuenced by the rare earth doping of SnO2 and also by the annealing temperatures Doping led to chemical and microstructural variations ... detector (TCD), Porapak-Q, and a 5A molecular sieve column with Ar as the carrier gas Reaction data were recorded for h Results and Discussion The characterization of undoped and rare earth-doped tin...

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Báo cáo vật lý: "Synthesis, Characterisation and Catalytic Performance of Porous Nafion Resin/Silica Nanocomposites for Esterification of Lauric Acid and Methanol" potx

Ngày tải lên : 07/08/2014, 14:20

... potassium bromate, ground homogenously and converted into pellet form 2.3 Catalytic Performance The reagents used for catalytic tests were methanol (J.T Baker, 100%) and lauric acid (POFAC 1299) Esterification ... molecular water, and the band at around 3400 cm–1 corresponded to structural hydroxyl groups and also OH stretching of physically absorbed water There were two peaks at 1216 and 1148 cm–1 for ... NR/S-5, 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...

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PetroleumThermal and catalytic processes in petroleum refining 2003

Ngày tải lên : 22/08/2014, 10:06

... coking) The second part studies catalytic processes on acidic catalysts (catalytic cracking, alkylation of isoalkanes, oligomerization) The third and fourth parts analyze catalytic processes on metal ... many years of work in the petrochemical industry, and in research, and of university teaching It sums up my technical and scientiﬁc background and reﬂects the concepts that I developed over the ... among quite different sciences and phenomena (chemistry, hydraulics, heat transfer, etc.) This situation requires a multifaceted competence and the full understanding and control of the entire complex...

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PURIFICATION AND CATALYTIC REFORMING OF METHANE a NEW INSIGHT INTO CARBON ADSORBENT AND MEIC MEMBRANE REACTOR

Ngày tải lên : 09/09/2015, 10:13

... CGO and CGO60-LBFZ40 95 Figure 5.3 XRD patterns 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 ... between catalytic activity and performance stability of POM catalyst is also crucial to this membrane reactor Some factors such as coke deposition, sintering of metal crystallites and oxidation ... cryogenic air separation to produce oxygen, coking and sulphur susceptibility of the Ni-based POM catalyst, and the sintering of the supported Ni catalytic sites at high temperatures This PhD research...

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DEVELOPMENT OF NI BASED CATALYTIC, CERIA NANO STRUCTURES AND CATALYTIC MEMBRANE REACTOR OF HIGH TEMPERATURE WATER GAS SHIFT REACTION

Ngày tải lên : 09/09/2015, 11:22

... Mr Boey, Mr Toh and Mr Rajamohan) and undergraduate students in chemical and biomolecular engineering department for their help, guide and assist in conducting the experiments and teach me plenty ... of hydrocarbon/alcohol and WGS reaction For instance, the toggle between the oxidation state of Cu (Cu2+ to Cu+/Cuo) and Ce (Ce3+ to Ce4+) are the main routes in oxidation and reduction process ... 5Ni5Cu/CeO2 and 5Ni5Cu@CeO2 Figure 7.5 XPS pattern for (i) Bimetallic Ni-Cu (a) Cu2p (b) Ni2p, (ii) Reduced Catalyst 5Ni5Cu/CeO2 and 5Ni5Cu@CeO2 (a) O1s, (b) Cu2p, (c) Ni2p and (d) Ce3d Figure 7.6 (a) Catalytic...

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