... 5:1387–1392 length of nanowires is up to several tens of micrometers Au particle can be found on the top of each nanowire, and the diameter of the nanowire is consistent with the size of Au particle, ... growth of 1-D nanostructures In order to guide the growth of the teeth of nanocombs, Au nanoparticles are introduced in our experiment A thin layer of Au was deposited on the surface of as-grown ... the side surface of Ga2O3 nanowires, which may derive from the difference of surface energy of Ga2O3 crystal planes Orderly arrange of Au nanoparticles on the specific plane of Ga2O3 nanowire...
... nontoxic nature 1.2 Supported metals in nanocatalysts An important group of heterogeneous catalysts is the group ofsupportedmetal catalysts, generally containing small metal particles dispersed ... properties of the supportedmetal particles.[59] It has been well documented that by manipulating the properties of oxide substrate, the stability and catalytic performance ofsupportedmetal clusters ... properties and performance of nanocatalysts, much remains to be learned Research in nanocatalysts by using supportedmetal is challenging for several reasons First, as supportedmetal clusters or nanoparticles...
... diacetate (10) 40 4.7 Synthesisof Folate-NHS (11) 41 4.8 Synthesisof Folate-DOTA (13) 42 4.9 Synthesisof Folate-DO3tBu (12) 43 4.10 Synthesisof Mannich Salt (14) 46 4.11 Synthesisof Bis-disulfide ... Bis-disulfide (15) 47 4.12 Synthesisof Bis-sulfone (16) 48 4.13 Synthesisof Bromoethyl-bis-sulfide (18) 50 4.14 Synthesisof Piperazine-bis-sulfide (23) 52 4.15 Synthesisof Tert-butyl 4-(2-aminoethyl) ... department of NUS for giving me the opportunity to undertake this project i Table of Contents TABLE OF CONTENTS Acknowledgements i Table of Contents ii List of Figures v List of Schemes vi Index of Abbreviations...
... presence of 0.02 mM [a-32P]ATP While confirming the adenylylation of these compounds and the absence ofsynthesisof poly(A) by the E coli poly(A) polymerase, we did not observed adenylylation of guanosine, ... independent synthesisof poly(A) In order to understand why dinucleoside polyphosphates activated the primer independent synthesisof poly(A), the effect of 0.01 mM Gp4G or Ap4A on the synthesisof poly(A) ... taken and analyzed by HPLC as indicated in Materials and methods Relative activity of GpnGs as effectors of the synthesisof poly(A) Based on the above results, the effect of several diguanosine...
... fraction of magnetite In this paper, we report a facile one-pot synthesisof PANI/magnetite nanorod composites through DBSA micelleassisted synthesisby in situ self-assembly method The presence of ... scheme of the possible synthesis mechanism of the composite particles is shown in Fig By taking advantage of the micelle reaction system, we firstly obtained colloidal PANI doped with DBSA by the ... the decomposition of PANI As seen from the TGA curves, the rate of weight loss of PANI (curve a) is much fast, the residue of PANI is 44.06%; while the rate of weight loss of PANI/magnetite nanocomposites...
... formation of Pd nanoparticles [21] But, in the current procedure, reduction of Pd by oxalate occurs so rapidly and of UV irradiation is sufficient for the complete reduction of PdCl2 (20 mL of mM) ... morphology in the synthesisofmetal nanoparticles [30] Synthesisof Pd nanoparticles from PdCl2 and potassium oxalate is schematically explained in Fig The optimized geometry of oxalate di anion ... is the intensity of the (hkl) reflection of the sample under analysis, Io(hkl) is the intensity of the (hkl) reflection of a polycrystalline bulk sample and ‘n’ is the number of Nanoscale Res Lett...
... and good quality of MWCNTs obtained by mechanothermal makes it a suitable promising method ofsynthesis for the production of MWCNTs or other graphitic nanocarbons Indeed, because of the simplicity ... determination of the surface areas of solid materials and involves the use of the BET equation: 1 CÀ1 P ¼ þ W½ðP0 =PÞ À 1 Wm C Wm C P0 wherein W is the weight of gas adsorbed at a relative pressure of ... carbon-coated copper gird A drop of alcohol was first added to the nanofiber film Then, the film was scratched by a pair of tweezers attached to the carbon-coated copper gird Most of the nanotubes are Fig...
... characterized and the bimetallic catalysts were evaluated in D-glucose hydrogenation Chapter is the details ofsynthesisof the mesoporous carbon microfiber supported Ru catalystsby Chapter Introduction ... migration of the Ru particles (Maris et al., 2006) 1.4 Carbon -supported catalysts for hydrogenation reactions Many heterogeneous hydrogenation catalysts consist of metals or metal compounds supported ... Physicochemical properties of bimetallic Ru-Cu catalysts Table 5.2 The chemisorption results of the catalysts Chapter Table 6.1 Physicochemical properties of Ru catalysts Table 6.2 Metallic dispersions...
... reduction, as characterized by IC50s of 10.7 lm and 81.4 lm for inhibition of OmcA and OmcB, respectively Modes of inhibition of either OmcA or OmcB by V(V) The modes of inhibition of either OmcA- or ... undefined metal specificity To address these latter issues, we constructed omcA, omcB and omcA ⁄ omcB insertion mutants of MR-1, and analyzed them in terms of dissimilatory reduction of a variety of metals, ... accessibility of the presented metal play crucial roles in terms of binding efficiencies and subsequent reduction by the appropriate enzyme The identification and characterization of alternative terminal metal...
... optima The spectrum of antibacterial action of endolysins is determined by the enzyme type, composition of the cell wall components of the target bacterium, and configuration of the substrate (peptidoglycan) ... induced synthesisof a protein product of the expected size (about 15 kDa) The sequence of the lys gene in the plasmid was checked by sequencing both DNA strands Inside the cell, all of the protein ... reaction was initiated by the addition of a chloride of the corresponding metal The activity was calculated as a percentage of the initial activity, measured in the absence of chelators Values represent...
... activity of three-way catalysts based on mixed metal oxides for the treatment of exhaust gases from internal combustion engine EXPERIMENTAL 2.1 Synthesisof the catalysts 2.1.1 Sol-gel synthesisof ... 2.1.2 Catalystssupported on γ-Al2O3 In order to compare the activity of metallic oxide and precious metal, the metallic oxide catalysts were impregnated on commercial γ-Al2O3 A suitable amount of ... ACObypass 100% AC3 H6bypass AC3 H6 outlet AC3 H 6bypass ANObypass ANOoutlet ANObypass 100% 100% Synthesize and investigate the catalytic activity of three-way catalysts based on mixed metal...
... Pd-Cu-Ni-O etc The presence of sulphur and carbon in the metal oxides was avoided by using non-sulphur, non-carbon containing metalprecursors The synthesisof Pd- based metal oxides by this sonochemical ... to this reactor was provided by an aquarium pump Method ofSynthesisofmetal oxides Fig Flow diagram of the synthsis process of Pd+CuO 92 Inorganic Nanomedicine: Synthesis, Characterization ... copper oxide [21] Inorganic (metal) salt precursors The type of inorganic precursors used in the synthesis depends on the metallic oxides to be synthesized, which includes precursors with organic...
... which acted as bridges connecting metal ions and CNMs Our methods can be applicable for a large variety ofmetal ions By adopting bi -metal or even tri -metal precursors in a certain mole ratio, ... Nanotubes for Detection of Every Nanotube by Surface-Enhanced Raman Spectroscopy J Am Chem Soc 2009, 131:14310 13 Li J, Tang SB, Lu L, Zeng HC: Preparation of Nanocomposites of Metals, Metal Oxides, and ... were seldom observed by TEM observation The sizes and loading ratio of NPs on SWNTs can be controlled by altering temperature, the ligand, and the initial concentrations of the metal ions It is worth...
... burning of graphitic layers of nanotubes and a slight weight gain at 850 °C of Ni-encapsulated MWNB may be due to the formation of higher oxides ofmetal after complete burning of graphitic layers of ... concentrated on the synthesisof SWNT, MWNT and metal- filled MWNT, addressing various key issues such as scale up, reproducibility and low cost Several methods of filling of CNTs by foreign metal nanowires ... properties of metal- filled MWNB have been studied using a PAR vibrating sample magnetometer up to a magnetic field of 10 kOe, and the results have been discussed by comparing with those of metal- filled...
... deposition of SWNTs Various bimetallic catalysts have been used as catalysts for the production of hydrogen [23] Carbon nanofibers possessing a platelet structure were obtained by Wang et al., by decomposition ... alloy used for the preparation of hydride catalysts Figure 2b shows the EDX spectra of Nifilled MWNT TEM and HRTEM images of SWNTs obtained at a growth temperature of 950°C are respectively shown ... TEM images of Zr-based AB2 alloy filled MWNTs grown at a temperature of 850°C, (c) HRTEM image of Ni-filled MWNT grown at 875°C, (d) TEM image of MWNTs grown at 900°C optical mode E2g of two-dimensional...
... removal of RO16 dye by Cu-AC4 catalyst in the presence of UV, H2O2 and H2O2 /UV Journal of Physical Science, Vol 21(2), 29–40, 2010 37 The presence of H2O2 and H2O2/UV enhanced the colour removal by ... oxide supported on Al2O3 and active carbon Mater Lett., 17(5), 297–302 Wang, S & Lu, M G Q (1997) Effects of oxide promoters on metal dispersion and metal- support interactions in Ni catalystssupported ... corresponding Cu -supported catalyst on the decolourisation of Reactive Orange 16 (RO16) dye The chemical structure of RO16 dye is shown in Figure Figure 1: The chemical structure of RO16 dye Journal of Physical...
... control of all of them; The synthesisof Ag@AgAu metal core alloy shell nanoparticles with tunable shell composition This type of bimetallic nanoparticles was formed by carefully controlling the synthesis ... nanoparticles is determined by the mole ratio of metals atoms to dendrimer molecules One unique feature of nanoparticles stabilized by dendrimers is that they are confined primarily by steric effects, ... In addition to the reduction ofmetal ions, thermal decomposition of organometallic compounds in the presence of surfactants is another approach to the synthesisofmetal 20 Chapter nanoparticles...
... DEVELOPMENT OF SEMICONDUCTOR METAL OXIDE GAS SENSORS MODIFIED BY MESOPOROUS SILICA MATERIALS YANG JUN (PhD, NUS) A THESIS SUBMITTED FOR THE DEGREE OF PH.D OF ENGINEERING DEPARMENT OF CHEMCIAL ... 1000 ppm of H2 by SnO2(40%)/SBA-15 sensor and (b) 1000 ppm of CO by SnO2(45%)/SBA-15 sensor at different operating temperatures Fig 4.6 Effect of SnO2 content on the sensitivity at 250oC of SnO2/SBA-15 ... ppm of H2 and 1000 ppm of CO on SnO2(45 wt%)/MCM-41 composite gas sensor Fig 6.8b Effect of SnO2 content on the sensitivity of SnO2/MCM-41 composite sensors to 1000 ppm of H2 and 1000 ppm of CO...