chromatography electrochemistry on peroxidase redox polymer coated electrodes
Báo cáo Y học: The Fe-only nitrogenase and the Mo nitrogenase from Rhodobacter capsulatus A comparative study on the redox properties of the metal clusters present in the dinitrogenase components doc
... according to Chen & Mortenson [25] Redox titrations Redox titrations were performed in a modified redox titration cell similar to that described by Dutton [26] The redox potential was measured ... broad resonance in the spectrum The pH-dependent occurrence of the two EPR signals is due either to subtle conformational differences in the cluster environment or to protonation/deprotonation effects ... Mortenson, L.E (1977) Inhibition of methylene blue formation during determination of the acid-labile sulfide of ironsulfur protein samples containing dithionite Anal Biochem 79, 157–165 Dutton, P.L...
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Báo cáo khoa học: Effects of the antioxidant PycnogenolÒ on cellular redox systems in U1285 human lung carcinoma cells docx
... primarily at the transcription level, effects on translation may also occur One example is the strictly redox- regulated translation factor SBP2, which is required for incorporation of selenocycstein ... of PycnogenolÒ on redox enzymes, with emphasis on the regulation of TrxR Results Effects of PycnogenolÒ on cellular TrxR enzyme activity To investigate the effects of PycnogenolÒ on the TrxR, GPx ... including reduction of thioredoxin and other low molecular weight substances, and reduction and detoxification of hydroperoxides [9] This reduction may be direct or by regeneration of antioxidants...
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báo cáo hóa học: " Fabrication of flexible UV nanoimprint mold with fluorinated polymer-coated PET film" docx
... manuscript to a journal and benefit from: Convenient online submission Rigorous peer review Immediate publication on acceptance Open access: articles freely available online High visibility within the ... nano-sized patterns, the contact angle of the unpatterned fluorinated polymer surface was 105° After the hot embossing process, the contact angle of the fluorinated polymer- coated flexible PET mold ... processes were done on large size substrates without any noticeable defects SEM micrographs Figure Fabrication of UV nanoimprint template Fabrication using hot embossing process of PET film coated with...
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Báo cáo hóa học: " Electrical Conductivity Studies on Individual Conjugated Polymer Nanowires: Two-Probe and Four-Probe Resu" potx
... localization length of electrons Lc (Lc * 20 nm for conducting polymers close to the metal–insulator transition [31]); therefore, localization of electrons induced by Coulomb interaction or small ... by R2P = Rlead1 ? Rcon1 ? R4P ? Rcon2 ? Rlead2 = Rlead ? Rcon ? R4P, where Rlead = Rlead1 ? Rlead2 is the resistance of the two microleads and Rcon = Rcon1 ? Rcon2 is the contact resistance of ... intrinsic electronic transport properties of single polymer nanowires and how the nanocontacts can affect the results These questions are very important for the fabrication and characterization of nanodevices...
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Lead–acid batteries with polymer-structured electrodes for electric-vehicle applications potx
... weight distribution Electric conductivity by means of the resistance map of the grids, in comparison with conventional grid designs, gravity cast and expanded Distribution of conductive materials, ... temperature conditions: partial melting of PNS substrate During the project, new grids including modifications in the polymer substrate, knitting design and copper and lead electrodeposition conditions, ... process conditions defined in the project The process conditions of the pre-tinning step are also critical: Fig shows that long immersion times can lead to the partial melting of the polymer and...
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A study of detection of enantiomers and chemical analogues by molecular imprinted polymer coated quartz crystal microbalance technique
... interactions between specific functional groups on the polymerizable monomers and the template in order to position the monomers in a specific spatial orientation prior to polymerization After polymerization ... functional monomers…………………………………… 49 3.2.2 Effect of PVAc on the adsorption and thickness of MIPs………….53 3.2.3 Sorption characterization of SMZ-sensor………………………… 57 3.2.4 Characterization of polymer ... technique Table 1.2 Functional monomer and template utilized in the combination technique Functional monomer Template Reference Polyanion and polycation Adenosine [113] 5’-monophospate Methacrylic...
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Fabrication of metal tetraamine phthalocyanine polymer modified electrodes for nitric oxide sensing studies
... activity was not very strong” 1.3.2 Electropolymerized MTAPc modified electrodes as NO Sensor As mentioned earlier, studies on NO sensing based on electropolymerized MTAPc modified electrodes4 4-46 have ... Nafion -coated Electropolymerized Poly-MTAPc modified GCE 70 3.2.1 Electropolymerization of MTAPc through Cyclic Voltammetry …………………………………………………………………72 3.2.2 DPV response of Nafion/poly-PtTAPc/GCE ... electrode 87 3.4 Comparison of Electrodes (Nanotube Array vs Thin Film): DPA Calibration of NO concentration between 0.1 – 1.0μM 92 Chapter 4: Conclusion 4.1 4.2 4.3 4.4 Two-Step Microwave...
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Fabrication of metal tetraamine phthalocyanine polymer modified electrodes for nitric oxide sensing studies
... activity was not very strong” 1.3.2 Electropolymerized MTAPc modified electrodes as NO Sensor As mentioned earlier, studies on NO sensing based on electropolymerized MTAPc modified electrodes4 4-46 have ... Nafion -coated Electropolymerized Poly-MTAPc modified GCE 70 3.2.1 Electropolymerization of MTAPc through Cyclic Voltammetry …………………………………………………………………72 3.2.2 DPV response of Nafion/poly-PtTAPc/GCE ... electrode 87 3.4 Comparison of Electrodes (Nanotube Array vs Thin Film): DPA Calibration of NO concentration between 0.1 – 1.0μM 92 Chapter 4: Conclusion 4.1 4.2 4.3 4.4 Two-Step Microwave...
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Evaluation of sterilization possibility in water environment of activated nano mno2 coated on calcined laterite
... Unlike methods that rely on firewood, it has low impact on the environment [6] 1.2.7 Photocatalysis on semiconductors The processes of heterogeneous photocatalysis on semiconductors, developed during ... turned into application of the heterogeneous photocatalytic methods to water detoxification [6] 1.2.8 High speed water sterilization using one-dimensional nanostructures One-dimensional nanostructures ... of sterilization of MnO2 coated on calcined laterite in water There are two main purposes in this part: One is to examine whether the mechanism of sterilization of MnO2 coated on calcined laterite...
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Tài liệu Báo cáo khoa học: Binding of ligands originates small perturbations on the microscopic thermodynamic properties of a multicentre redox protein pptx
... Catarino T, Baptista AM, Soares CM, Carrondo MA, Turner DL & Xavier AV (2001) Conformational component in the coupled transfer of multiple electrons and protons in a monomeric tetraheme cytochrome J ... 49 50 51 in regulation of the cytochrome c oxidation–reduction equilibrium Biochemistry 28, 3188–3196 Zhou H-X (1994) Effects of mutations and complex formation on the reduction potentials of cytochrome ... electrons and protons in a monomeric cytochrome c3: the importance of mechano-chemical coupling for energy transduction Chembiochem 2, 831–837 Dutton PL (1978) Redox potentiometry: determination...
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Tài liệu Báo cáo khoa học: Coordination chemistry of iron(III)±porphyrin±antibody complexes In¯uence on the peroxidase activity of the axial coordination of an imidazole on the iron atom ppt
... ligands on the iron atom, and the only one that enters the active site bind on the less hindered face of the porphyrin which bears only one ortho-COOH substituent (Fig 7C) The inhibition of the peroxidase ... imidazoles to the iron(III) of Fe(ToCPP) and Fe(ToCPP))13G10 The second part of our results concerns the binding of imidazole derivatives on the iron of Fe(ToCPP) either alone in solution or inside ... reactions with imidazole, a further 15 incubation at 19 °C with 50 mM imidazole was done; 0.2 mM ABTS was then added and the reaction was started by the addition of H2O2 at concentrations ranging...
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Báo cáo khoa học: Spectroscopic and kinetic properties of the horseradish peroxidase mutant T171S Evidence for selective effects on the reduced state of the enzyme potx
... Experimental conditions: cm)1 resolution; 441.6 nm excitation wavelength; concentration of 50 lM, 10 s 0.5 cm)1 collection interval, 20 mW laser power at the sample (wild type, pH 6.8); concentration of ... absorption spectroscopy For resonance Raman and electronic absorption spectroscopy the experimental conditions were as reported in the captions to gures Samples of ferrous enzymes for electronic ... concentration L, binding to a total protein concentration P, was determined, while allowing the remaining Kd and maximum absorbance change at saturation (A1) to oat Resonance Raman and electronic...
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Báo cáo Y học: Functional studies of the Synechocystis phycobilisomes organization by high performance liquid chromatography on line with a mass spectrometer docx
... additional information that two adjacent multiply charged ions differ by one charge Once M and z are determined for one pair of peaks, all other m/z signals can be deconvoluted into one peak on ... hydrophilic region of the protein, a region rich in amino acids with a higher than average contribution to the UV optical absorption and protonation of amino groups by electrospray ionization, leading ... separation of phycobilisomes upon injection of entire subcomplexes [14] The nondisruptive nature of this method has made it possible to collect information on the composition of each subcomplex and on...
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Báo cáo " Preparation of nano-structural MnO2 in ethanol-water media coated on calcinated laterite and study of its arsenic adsorption capacity " docx
... Percentage concentration of ethanol in MnSO4 solution and EP2: Percentage concentration of ethanol in KMnO4 solution Table showed strong effect of ethanol concentration in reagents’ solution on MnO2 ... aqueous acetone solution, Analytical Chemistry (1986) 31 [7] Tran Hong Con, Nguyen Phuong Thao, Phuong Thao, Investigation of arsenic adsorption property of metals hydroxide film coated on calcinated ... reformation of nanoparticles or inactivation… Arsenic adsorption equilibrium investigation gram adsorbent was dropped into 250 ml arsenic solution of 1000 ppb concentration The solution was stirred continuously...
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effects of dimensions on the sensitivity of a conducting polymer microwire sensor
... dimension The outline of this work is as follows Section discusses the detection principle of the conducting polymer film and microwire sensors In Section 3, the fabrication of the conducting polymer ... sheet Before coating the conducting polymers over the PMMA, all polymer solutions were kept in an ultrasonic bath for h to remove any aggregate formation in solution from prolonged storage The top ... 2.5 3.5 4.5 Acetone concentration (ppth) 5.5 Fig Sensitivity responses of the PEDOT–PSS sensors at various concentrations of acetone sensors not show higher sensitivities They considered this...
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Vertically Aligned WO3Nanowire ArraysGrown Directly on Transparent ConductingOxide Coated Glass: Synthesis andPhotoelectrochemical Properties
... direction of hexagonal nanowires was indexed along [001], which gave the strongest peak intensity in the XRD pattern The monoclinic nanoflakes were found to grow along [020] and [200] (zone axis ... resulting clear solution was diluted using deionized water to 100 mL with a molar concentration of 0.05 M Nanowire array growth was achieved using a mL portion of H2WO4 (0.05 M) solution, with 0.5 mL ... arrays were grown only with addition of HCl to the water and acetonitrile solution, while oxalic acid plays a key role in formation of the nanoflake films A change from wire to ribbon morphology was...
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Báo cáo khoa học: Redox reaction between amino-(3,4-dihydroxyphenyl)methyl phosphonic acid and dopaquinone is responsible for the apparent inhibitory effect on tyrosinase doc
... favor the redox reaction between dopaquinone and the phosphonic diphenol Because of the irreversibility of the systems (cyclization of dopaquinone and decomposition of the phosphonic o-quinone) the ... Retention of the benzylic proton in D2O demonstrates that the decomposition of the o-quinone (at least the one generated chemically) does not proceed via the quinone methide tautomer of the phosphonic ... the reactions were monitored by oxygen consumption, a substantial drop in oxygen concentration was also registered only for the diphenolic derivative (compound 1) To identify the oxidation product(s)...
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electrochemistry at metal and semiconductor electrodes
... 8.4 Complexation and Adsorption in Electron Transfer Reactions 8.4.1 Complexation shiffs the redox electron level 8.4.2 Contact adsorption shifts the redox electron level 8.5 Electron Transfer ... Dissolution of ionic semiconductors 9.2.4 Oxidative and reductive dissolution of ionic semiconductors 9.3 Ion Adsorption on Metal Electrodes 9.3.1 Ion adsorption equilibrium 9.3.2 Electron levels of ... Electron levels of adsorbed ions 9.4 Ion Adsorption on Semiconductor Electrodes 9.4.1 Ion adsorption equilibrium 9.4.2 Electron levels of adsorbed ions 9.4.3 Proton levels on electrode surfaces References...
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highly active photocatalytic zno nanocrystalline rods supported on polymer fiber
... crystals on the ZnO coated silicon and PBT substrates The silicon wafer was held face-down in the solution to prevent the precipitation of any ZnO particles that may have formed in the solution bulk ... resulting in calcination of the polymer After calcination, the resulting materials were dispersed in methanol, sonicated for min, and then transferred by pipette onto carbon film -coated TEM grids (Ted ... vial containing the control PBT fiber shows little degradation, and the vial with ALD ZnO coated PBT shows improved degradation compared to the vial with the uncoated PBT substrate The vial containing...
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Báo cáo hóa học: "Comparison of anti-CD3 and anti-CD28-coated beads with soluble anti-CD3 for expanding human T cells: Differing impact on CD8 T cell phenotype and responsiveness to restimulation" pot
... stimulation (Figure 5) T cell response to restimulation On occasion, the number of cells generated by one cycle of T cell expansion may be insufficient for the desired purpose, and further expansion ... selection using CD8+ Memory T Cell Isolation and CD8 + Naive T Cell Isolation Kits purchased from Miltenyi Biotech Monitoring T cell division and early expansion using CFSE labeled cells To monitor ... cells, our studies demonstrate substantial differences in their impact on CD8 cells that merit consideration in Page of 15 situations where preservation of the CD8 T cell response in important Methods...
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