reactions of acid chlorides synthesis of acyl compounds
Báo cáo Y học: Concerted regulation of free arachidonic acid and hormone-induced steroid synthesis by acyl-CoA thioesterases and acyl-CoA synthetases in adrenal cells pdf
Ngày tải lên :
08/03/2014, 09:20
... inhibitor of the AA-CoA synthetase Our results are consistent with the involvement of an acyl- CoA synthetase and an acyl- CoA thioesterase as important regulators of AA release in the mechanism of action ... Regulation of arachidonic acid release in steroidogenesis: role of a new acyl- CoA thioesterase (ARTISt) Endocr Res 26, 653–662 Tomoda, H., Igarashi, K & Omura, S (1987) Inhibition of acyl- CoA synthetase ... IC50 of 50 lM The expression of an acyl- CoA synthetase specific for AA, acyl- CoA synthetase (ACS4), in steroidogenic tissues has been reported [39] Triacsin C has been described as an inhibitor of...
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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
Ngày tải lên :
24/03/2014, 04:21
... instead of linoleic acid (E) As (A) but 1-hexanal was added instead of linoleic acid (F) As (A) but 2,4-nonadienal was added instead of linoleic acid (G) As (A) but MDA was added instead of linoleic ... instead of linoleic acid (D) As (A) but 1-dodecanal was added instead of linoleic acid (E) As (A) but 1-hexanal was added instead of linoleic acid (F) As (A) but 2,4-nonadienal was added instead of ... instead of linoleic acid (D) As (A) but 1-dodecanal was added instead of linoleic acid (E) As (A) but 1-hexanal was added instead of linoleic acid (F) As (A) but 2,4-nonadienal was added instead of...
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combinatorial synthesis of derivatives of bioactive compounds via a sulfone scaffold
Ngày tải lên :
11/09/2015, 08:59
... Combinatorial Synthesis of Derivatives of Bioactive Compounds via a Sulfone Scaffold GAO YONGNIAN (B.Sc., Soochow University) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMISTRY ... Cycloaddition of resin 2-3a to form triazole 2-5a 43 Table 3.1 Synthesis of 3-3b 64 Table 3.2 Synthesis of 3-8a 65 Table 3.3 Cycloaddition of Cyclic Vinylsulfones 3-5b and TosMIC 71 Table 4.1 Oxidation of ... chemistry offers the opportunity to synthesize every combination of compounds A1 to Am with compounds B1 to Bn, thus providing compounds AiBj (where i=1-m, j=1-n) This collection of compounds...
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Cu(II) and Ni(II) complexes of n (2 hydroxybenzyl) amino acid ligands synthesis, structures, properties and catecholase activity 4
Ngày tải lên :
15/09/2015, 17:10
... clusters,1 there is a surge of interest in applying the principles of supramolecular chemistry.2 Consequently, supramolecular chemistry is now at a phase of understanding of various hydrogen-bonded ... transport of water, protons and ions (Figure 4-1) For example, the selective transport of water across cell involves the hydrogen bonded assembly of single H-bonded helical chains of water molecules ... acid, H3Sglu H3Sglu ligand has been synthesized according to the procedure described in Chapter 224 Chapter 4-6-2 Synthesis of complex [(H2O)2⊂{Ni(HSglu)(H2O)2}]⋅ H2O, IV-1 A clear solution of...
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Cu(II) and Ni(II) complexes of n (2 hydroxybenzyl) amino acid ligands synthesis, structures, properties and catecholase activity 3
Ngày tải lên :
15/09/2015, 17:10
... containing natural amino acids while improving the structural insights in terms of hydrogen bonding tendencies of the amino acid components 3-5 Experimental 3-5-1 Synthesis of ligands N -(2-hydroxybenzyl)-L-aspartic ... Figure 3-16 Perspective view of III-7 When the side arm of ligand is modified by incorporating the -CONH2 donor group in the place of COO-, the mode of coordination of the ligand is different from ... 3-13 The TG of III-1 and III-3 displayed the weight loss of 14.8% (calculated, 15.2%) and 15.8% (calculated, 14.2%) respectively corresponding to the loss of three water molecules The TG of III-2...
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Cu(II) and Ni(II) complexes of n (2 hydroxybenzyl) amino acid ligands synthesis, structures, properties and catecholase activity 2
Ngày tải lên :
15/09/2015, 17:10
... Packing diagram of IIA-3a 2-A-2-2-4 Crystal structure of [Cu2(OHScp11)2(H2O)2], IIA-4 Figure 2-20 A perspective view of the dimer IIA-4 The crystal structure of IIA-4 consists of the basic dimeric ... binds to the met state, followed by the oxidation of the substrate to the first quinone and the formation of the reduced state of the enzyme Binding of the dioxygen leads to the oxy state which is ... further side reactions such as ring opening 52 Chapter Figure 2-5 Biomimetic oxidation of 3,5-DTBC catalyzed by dicopper(II) complex Figure 2-6 Formation of 3,5-DTBQ band from the oxidation of 3,5-DTBC...
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Cu(II) and Ni(II) complexes of n (2 hydroxybenzyl) amino acid ligands synthesis, structures, properties and catecholase activity
Ngày tải lên :
15/09/2015, 17:10
... Table of Contents Acknowledgements i Declaration ii Table of Contents iii Abbreviations x Copyrights Permission xiv Summary xv List of Compounds Synthesized xviii List of Figures xxvii List of Tables ... perspective view of IIA-3a 68 Packing diagram of IIA-3a 70 A perspective view of the dimer IIA-4 70 Packing diagram of IIA-4 72 A segment of H-bonded 3D network in IIA-4 72 A perspective view of IIA-6a ... a planar conformation of the tridentate ligand 18-19 Many of the model studies of the metal complexes of Schiff base ligands composed of PLP or salicylaldehyde and amino acids have focused upon...
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Dictionary of food compounds additives, flavors, and ingredients yannai s 2004
Ngày tải lên :
16/09/2013, 21:58
... Society of Chemistry, 1992, A788 Aconitic acid A-108 [499-12-7] 1-Propene-1,2,3-tricarboxylic acid, 9CI Achilleaic acid Citridinic acid Equisetic acid Pyrocitric acid 3-Carboxy-2-pentenedioic acid ... 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 ... 20-Carboxylic acid: [3650-09-7] 11,12-Dihydroxy-8,11,13-abietatrien-20-oic acid Carnosic acid Deoxypicrosalvinic acid Salvin$ C20H28O4 332.439 Isol from Salvia officinalis (sage) and Rosamarinus officinalis...
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Tài liệu ADSORPTION OF ORGANIC COMPOUNDS doc
Ngày tải lên :
14/02/2014, 03:20
... 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...
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Tài liệu NOMENCLATURE OF ORGANIC COMPOUNDS docx
Ngày tải lên :
14/02/2014, 08:20
... with an –oic acid ending Examples: O HCOH methanoic acid (formic acid) O CH3COH ethanoic acid (acetic acid) d) Esters An ester is formed from the combination of a carboxylic acid and an ... diethyl ether (ethoxyethane) Carbonyl Compounds Carbonyl compounds all contain a O This includes several types of compounds: Aldehydes Ketones Carboxylic acids Esters Amides a) Aldehydes O ... 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...
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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
Ngày tải lên :
19/02/2014, 12:20
... 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 ... presence of an acidic residue in the penultimate position reduces the rate of release of the N-terminal residue [23] In onconase, there is an aspartyl residue in position that could reduce the rate of ... nonspecific hydrolysis, of the polypeptide chain When investigating the effect of pH on the cyclization reaction, we expected that an acidic pH might enhance the rate of conversion of (Gln1)-ONC(M23L)...
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Báo cáo khoa học: Functional dissection of Escherichia coli phosphotransacetylase structural domains and analysis of key compounds involved in activity regulation potx
Ngày tải lên :
06/03/2014, 11:20
... ATP PEP 20 25 Ac-P synthesis activity (%) 140 Ac-CoA synthesis activity (%) Pta 140 Ac-P synthesis activity (%) Ac-CoA synthesis activity (%) A Ac-P synthesis activity (%) Ac-P synthesis activity ... 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...
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Báo cáo khoa học: Reactions of gold(III) complexes with serum albumin docx
Ngày tải lên :
07/03/2014, 21:20
... 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]...
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readily prepared from more reactive acyl derivatives (acid chlorides and anhydrides)
Ngày tải lên :
15/03/2014, 23:14
... Natronlauge die Stoffmenge n des eingesetzten Esters berechnet werden 30 Carbonsäureester 2.6 CH-acide Ester Ester verfügen über eine schwache Acidität des α –Wasserstoffatoms Besonders CH-acide Ester ... Verseifung CH-acide Ester Verwendung Ester anorganischer Säuren Schulrelevanz Einleitung Einleitung Stoffgruppe organischer Verbindungen Entstehung durch Reaktion von Sauerstoffsäuren mit ... Carbonsäureester 2.7 Verwendung Aromastoffe: - Nahrungsmittel - Parfüme Lösungsmittel: - Lacke - Klebstoffe - Emulgatoren/ Haushaltsreini Konservierungst ger offe: - Fischkonserven (PHB-Ester) PHB-Ester...
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Báo cáo khoa học: Brain succinic semialdehyde dehydrogenase Reactions of sulfhydryl residues connected with catalytic activity pdf
Ngày tải lên :
16/03/2014, 18:20
... DABIA-Cys (Dys), based on amino acid analysis Of interest, the amino acid sequences of peptides I and II were found to be identical to regions of human SSADH, i.e amino acids 341–350 and 266–279, ... with the amino acid compositions determined after the acid hydrolysis of each DABIA-labeled peptide (data not shown) The stoichiometric study (Fig 3) and the analysis of amino acid sequence (Table ... 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...
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Báo cáo khoa học: Light-induced reactions of Escherichia coli DNA photolyase monitored by Fourier transform infrared spectroscopy pot
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 ... this frequency (trace C of Fig 4) can be attributed to incomplete H«D exchange Again, the impact of deuterium replacement of acidic protons is best observed after subtraction of trace C from trace...
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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
Ngày tải lên :
16/03/2014, 19:20
... 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)...
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DETERMINATION OF ORGANIC COMPOUNDS IN DRINKING WATER BY LIQUID-SOLID EXTRACTION AND CAPILLARY COLUMN GAS CHROMATOGRAPHY/MASS SPECTROMETRY pdf
Ngày tải lên :
22/03/2014, 14:20
... 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...
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PREDICTION OF CHEMICAL REACTIVITY PARAMETERS AND PHYSICAL PROPERTIES OF ORGANIC COMPOUNDS FROM MOLECULAR STRUCTURE USING SPARC pptx
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 ... pKa's in water of 3685 organic compounds The overall RMS deviation was equal to 0.37 This test does not include carbon acid The majority of the molecules are complex, e.g., some of the molecules...
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