aromaticity reactions of benzene
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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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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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 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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Báo cáo Y học: Production and chemiluminescent free radical reactions of glyoxal in lipid peroxidation of linoleic acid by the ligninolytic enzyme, manganese peroxidase pot
... reaction, 0.5 mL of aqueous PFBHA (0.05 M , 200 mL) was added and reacted at 35 8C for 0.5 h [17] To this solution, 10 mL of a 10-mM methanol solution of decafluorobenzene (DFB) and a drop of 18-N-sulfuric ... width of 1.0 mm The wavelength range of the spectrometer was 370– 820 nm Experimental conditions are described in the legend of each figure R E S U LT S Formation of glyoxal in the reaction of linoleic ... 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...
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metal catalysed reactions of hydrocarbons fac
... OF INDUSTRIAL CATALYSTS Lawrie Lloyd METAL-CATALYSED REACTIONS OF HYDROCARBONS Geoffrey C Bond METAL–OXYGEN CLUSTERS: The Surface and Catalytic Properties of Heteropoly Oxometalates John B Moffat ... Temperature-Inversion of Rates 10.2.5 Hydrogenation of Benzene Over Bimetallic Catalysts 10.2.6 Exchange of Aromatic Hydrocarbons with Deuterium 10.2.7 Hydrogenation of Benzene to ... 598 599 599 601 CONTENTS 14.2.3 Reactions of Linear Alkanes with Hydrogen 14.2.4 Reactions of Branched Alkanes with Hydrogen 14.2.5 Reactions of Cyclic Alkanes with Hydrogen...
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Báo cáo hóa học: " Catalytic ozone oxidation of benzene at low temperature over MnOx/Al-SBA-16 catalyst" pdf
... oxidize benzene As shown in Figure 6, the consumption of ozone had a good correlation with the conversion of benzene: a higher benzene conversion was obtained at a higher consumption of ozone ... the extent of reduction was larger for Al-SBA-16-MN15% Figure shows the benzene conversions and yields of COx (CO2 + CO) obtained for 80 of reaction time using two catalysts Both the benzene conversion ... investigate the effect of Mn precursors on the catalytic ozone oxidation of benzene Experimental details Synthesis of MnOx/Al-SBA-16 catalysts The detailed procedure for the synthesis of mesoporous silica...
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The jealous reactions of one person to the success potx
... both of them were inseparable It so happened that a student from Primary Six needed to be chosen as the assistant secretary of the school’s sports department She was to represent the students of ... four, five and six at any meeting held in preparation of the school’s coming sports meet The teachers had unanimously chosen Diana because of her popularity among the other students Besides, she ... mention of her name made her strain her neck and try to catch a few words from their conversation What a shock she had when she finally pieced the information together Liza was actually jealous of...
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Báo cáo y học: " Pathological studies on postvaccinal reactions of Rift Valley fever in goats" pptx
... be concluded that the use of live attenuated vaccine of RVF (Smithburn strain) for immunization of live stock in Egypt is danger As the use of live attenuated vaccine of RVF (Smithburn strain) ... degeneration of hepatocytes showing kid Liver of in group-1, animal sacrificed two weeks P.V., Liver of kid in group-1, animal sacrificed two weeks P.V., showing diffuse vacuolar degeneration of hepatocytes ... disconfiguration of the hepatic parenchyma was seen Some bile ducts showed hyperplasia of the epithelial lining Large number of mononuclear cells infiltration was Figure hyperplasia of animal sacrificed...
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Reactions of pyridazine and some gaseous oxides on the GE(100) surface
... 1.4.3.1 Reactions of halogens 31 1.4.3.2 Reactions of hydrogen halides 32 Reactions of gaseous oxides 32 1.4.4.1 33 1.4.3 1.4.4 Reactions of ... image of Ge(100) 1.4.3 Reactions of halogens and halides Reactions of halogens on semiconductor surfaces are of both fundamental and industrial interest In semiconductor industry, reaction of halogens ... additions of aromatics on Ge(100) are energetic unfavorable due to the loss of resonance energies of aromatic rings Nevertheless, the [4+2] cycloaddition of benzene is able to occur on Ge(100) Benzene...
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Direct asymmetric vinylogous reactions of furanones and phthalide derivatives with bifunctional and trifunctional organocatalysts
... Table of Contents Summary List of Tables List of Schemes List of Figures List of Abbreviations List of Publications Chapter Introduction 1.1 1.1.1 Introduction 1.1.2 Historical background of organocatalysis ... Derivatizations of the vinylogous aldol adducts 57 2.4.4.1 Preparation of lactone 57 2.4.4.2 Preparation of glycerol derivatives 60 2.4.4.3 Preparation of antifungal agent 62 2.4.5 Analytical data of products ... direct Michael addition of bicyclic -ketoesters to aryl nitroolefins List of Schemes Scheme 1.1 Structures of some representative ligands Scheme 1.2 Early examples of asymmetric reactions using organic...
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Chiral bicyclic guanidine catalyzed diels alder reactions of anthrones
... DIELS–ALDER REACTIONS OF ANTHRONES SHEN JUAN 2008 CHIRAL BICYCLIC GUANIDINE CATALYZED DIELS–ALDER REACTIONS OF ANTHRONES SHEN JUAN (BSc., Suzhou University) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF ... of (+)-epiepoformin and (–)-theobroxide Scheme 2.8 Base-catalyzed reactions of N-tosyl-3-hydroxy-2-pyrone Scheme 2.9 Synthetic route of three validamine type compounds Scheme 2.10 Synthesis of ... constants of Et3N catalyzed Diels–Alder reaction of Anthrone Table 3.2 Order of Et3N Table 3.3 VT-NMR Experiments of Et3N catalyzed Diels–Alder reaction of Anthrone Table 3.4 Kinetic study of chiral...
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Organocatalytic reactions of 3 hydroxy 2 pyrone and n arylsulfonyl 3 hydroxy 2 pyridone 1
... catalyze the Diels-Alder reactions of 3-hydroxy-2-pyrone and electron deficient dienophiles giving cycloadducts in good yields.9 The use of the base varied from a catalytic amount of 0.1 equivalent ... The methods whereby DA reactions are traditionally and conventionally carried out included reflux and the use of Lewis acids as catalysts.2 On the other hand, the use of BrØnsted bases as catalysts ... Chapter 1.1 BrØnsted-Base Catalyzed Diels-Alder Reactions The Diels-Alder (DA) reaction is unarguably one of the most powerful bond forming reactions in organic chemistry as it creates as many...
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Organocatalytic reactions of 3 hydroxy 2 pyrone and n arylsulfonyl 3 hydroxy 2 pyridone 2
... DMSO 0.5 99 All entries employed eq of 1, eq of 4-cyano benzaldehyde, 0.15 eq of TBD and 0.5 ml of solvent 34 Chapter With optimized conditions, the VARs of 3-hydroxy-2-pyrone were attempted ... Scheme 2.22 Protection of one hydroxy group of VAP with a tosyl group 37 Chapter Figure 2.8 Crystal structure of VAP 10 The crystal structure of VAP 10 indicated a γ-attack of the pyrone on the ... reactions However, a large part of 2-pyrone chemistry also involves compounds that contain no hydroxyl group at the 3-position To-date, much of the DA reactions of 2-pyrones (no hydroxyl group...
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Organocatalytic reactions of 3 hydroxy 2 pyrone and n arylsulfonyl 3 hydroxy 2 pyridone 3
... base-catalyzed DA reactions Thus it should come as no surprise that 4a can also be used as a diene in Diels-Alder reactions The study of DA reactions of 4a shall occupy a major part of this chapter ... conveniently There are only a handful of examples in the literature on reactions with using 4a as the substrate Interestingly, most of the examples made use of 4a with N-sulfonyl protecting group ... nitrogen of the pyridone (Scheme 3.1) The sulfonyl group is chosen mainly because of its robustness to most acidic and alkaline conditions in the reactions Attempts to put other types of protecting...
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Organocatalytic reactions of 3 hydroxy 2 pyrone and n arylsulfonyl 3 hydroxy 2 pyridone 4
... methods All reactions were performed in oven-dried round bottom flasks or glass vials The flasks were fitted with rubber septa and reactions were conducted under a positive pressure of nitrogen, ... synthesis of N-arylsulfonyl-3-hydroxy-2-pyridone Pyridones 4b, 4c and 4d were prepared according to the published procedure.2 4.2.6 Procedure for the synthesis of 9a3 To a solution of 4b (219.9 ... C17H22NO4S 336.1264 4.2.10 Procedure for the synthesis of 9e6 The procedure for the protection of the alcohol is the same as for the synthesis of 4b White solid, 85% yield H NMR (500 MHz CDCl3 ppm):...
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First principles study of benzene adsorption on transition metal surfaces
... PRINCIPLES STUDY OF BENZENE ADSORPTION ON TRANSITION METAL SURFACES HONG WON KEON (B Eng.(Hons.), Sungkyunkwan University, Republic of Korea) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING ... Mode for Benzene at High Coverage ············105 3.3.1.2 Chemisorbed Benzene Structure as a Function of Coverage ···············106 3.3.1.3 Benzene Adsorption Energy as a Function of Coverage ... ionization potential of benzene, it significantly underestimates the electron affinity of benzene by 0.82 eV As a result, DFTPBE significantly underestimates the interaction between the benzene LUMO...
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Catalytic fast pyrolysis of biomass the reactions of water and
... during the pyrolysis of the lignin component of biomass; phenols are also formed by reaction of water molecules with aromatic intermediates formed during the transformation of all of the pyrolysis ... Catalytic fast pyrolysis of biomass: the reactions of water and aromatic intermediates produces phenols Green Chemistry Page of 16 View Article Online a reduction in formation of deoxygenated aromatics ... decoupling of aromatization reactions from olefin formation Similar results were also observed during upgrading of wood derived bio-oil,42 upgrading of canola oil to hydrocarbons,43 conversion of ethanol,44...
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